More than you expect...

No. 48 / 2007

RTD temperature probe with built-in transmitter for the pharmaceutical and food industry: JUMO DtransT100

New controller/transmitter series for water analysis measurements: JUMO Aquis 500

JUMO across the Oresund bridge

Content Editorial A customer magazine

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Topics

Important to know

New controller/transmitter series for water analysis measurements: JUMO Aquis 500

Too many choices – Choosing the right diaphragm for pH/Redox measurement

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Increased operational safety in melting baths – automatic changeover to backup controller 10

“Temperature sensors are becoming smarter and smarter” Wireless temperature measurement for diverse applications in the meat industry: JUMO Wtrans

From the field

Paperless recorder with integrated web server – new web technology for online display of 12 process data 4

JUMO across the Oresund bridge

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Mona Lisa’s smile (secret revealed?) – JUMO ensures a comfortable climate!

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Events JUMO at fairs and exhibitions

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Imprint

Products + Services

The JUMO Wtrans wireless temperature sensor T01.G1 and the multifunction receiver T01.EC1 were developed for wireless transfer of temperature readings. The transmitter is located in the sensor handle and is protected by a waterproof housing. The radio frequencies used are largely insensitive against external damaging influences. The transmitter is designed as an insertion probe. RTD temperature probe assembly with built-in transducer. for the pharmaceutical and food industry: JUMO DtransT100

JUMO SVS3000 Plant visualisation software JUMO heatTHERM-AT new thermostat series

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Published by: JUMO GmbH & Co. KG

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Responsible: Heinz Hauer

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Layout: Rolf Heinrich, Manfred Seibert Photo: Merz Tricot GbR, Steinau a. d. Straße

JUMO di308 the new digital display instrument

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Product expansion JUMO BlackLine LF-GT

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Product expansion JUMO Multitrode

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JUMO CTI-750 now with insertion probe made of PVDF

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Group of Companies The system is fully encased in a sensor housing and with its EHEDG approval corresponds to the high requirements of these industries.

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Two international workshops

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25 years of electronic manometers from JUMO

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Print: Hoehl-Druck Medien + Service GmbH Bad Hersfeld, Germany Reprint with source information required against specimen copy. All information is to the best of our knowledge, we assume no liability

JUMO GmbH & Co. KG Street address: Moltkestraße 13-31 36039 Fulda, Germany Postal address: 36035 Fulda, Germany Phone: +49 661 6003-0 Fax: +49 661 6003-607 e-mail: [email protected] Internet: www.jumo.net

Editorial

A customer magazine

creates completely new areas of application for transfer and analysis of temperature data, e.g. in the food processing or the chemical and pharmaceutical industry. The JUMO Dtrans T100, a RTD temperature probe assembly with sanitary process connections and integrated digital two-wire temperature transmitter is likewise at home in these sectors. We are always there for you, with Quality and Service - and last but not least with this Customer Magazine. We wish you plenty of joy while reading the latest issue of our new JUMOinfo!

Bernhard Juchheim CEO

Dear Reader, Hot off the press - in your hands you find the latest redesigned issue of our JUMOinfo – the content tailored to your needs and expectations. How do we know? Because you told us what to change - ultimately it is a customer magazine. Solid reader interests have crystallized from an extensive survey. Our customers would like a magazine preferably with practical content, especially application reports of JUMO products in the field, simple topics for measurement and control technology with tips and tricks for the practical user and less plain product information.

Therefore, we have changed our information layout and introduced fixed categories for a better overview. At the same time, we gave JUMOinfo a new refreshed look. As before, it is published twice a year and provides valuable information on important market topics, customer solutions and knowledge, new products and further developments and innovations from our company.

Michael Juchheim CEO

The cover story in this issue is about “smart temperature sensors”. The wireless measuring system – JUMO Wtrans – presents an effective and convenient alternative to hardwired solutions. It

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Topics

Wireless temperature

for multiple applications in the meat industry: JUMO Wtrans The JUMO Wtrans wireless temperature sensor T01.G1 for mobile and/or stationary temperature measurement at portable or fixed measuring locations as well as the multifunction receiver type T01.EC1 from the JUMO series Wtrans were developed for wireless transfer of temperature measurement values. The transmitter is located in the sensor handle and is protected by a waterproof housing. The radio frequencies used are largely insensitive to external interference and allow for transmission even in a rough industrial environment. The transmitter is designed as an insertion probe. The sensor is available with an insertion length of 50 to 100 mm and has an RTD chip as measuring element. On the transmitter side, an application temperature range of –30…+260°C was achieved. The possible ambient temperature range of the electronics is –30…+85°C. By considering the current applicable laws and by complying with the existing industry standards, a wireless solution with a very high interference resistance protocol in the ISM band at the frequency of 868 MHz (Europe) and 915MHz (USA, Canada, Australia, New Zealand) was selected for the JUMO-Wtrans system. The rail mounted receiver provides the measured values through four analog outputs [0(4) … 20 mA, 0…10 V] and via a RS 485 interface with MOD Bus

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protocol. Up to 16 transmitters (insertion temperature probes) can be managed per receiver via the RS 485 interface. Beneficial functions provide for a user friendly use in many different applications. An easy to use setup software allows changes to the system parameters and settings. In addition, all functions can be viewed, accessed and changed through the receiver unit display and buttons. Therefore, for each analog output, parameters such as linearization, scale start and end,

The author Dipl.-Ing. Michael Braun is Product Manager in Temperature Sensor Division filter constant and Min or Max value memory function can be defined separately. The option to select the above mentioned or other parameters as trigger for an alarm opens a wide spectrum of versatile applications and monitoring options for the user. All outputs from the device are isolated. During temperature measure-

Topics

ments, we strived for a real time behavior of the individual measured values. With the use of our innovative wireless transmission technology, installation work is greatly reduced, because long

connection lines in wired systems are always a hindrance for the user. Compared to wired solutions, wireless temperature sensors offer a convenient and cost efficient alternative. The advantages of using wireless solutions are obvious. Expensive and interference prone cable connections are no longer necessary, the wireless temperature sensor technology even works in rough industrial environments. In comparison to the wired measured data transmission, the costs for maintenance, repair and reinstallation is reduced. Complete new areas of tem-

perature sensing applications are possible with the JUMO-Wtrans wireless technology.

Further info: Internet: http://JI48_01GB.jumo.info e-Mail: [email protected] Transmitter: JUMO-Wtrans wireless insertion temperature sensor T01.G1 with a free field range of 300 m

Areas of application The transmitter is especially suitable for temperature measurements in various food processing steps. For example, during cooking and curing processes, the core temperature of, e.g. meat, is monitored without having to intervene in the process. The JUMO wireless technology is ideal for this type of application. With the temperature acquisition and transmission via wireless technology, the customer always has access to all measured data within each single process step with different curing zones in smokehouses. With subsequent chambers for intensive cooling of foodstuff, loss of weight

Receiver: JUMO-Wtrans multifunction receiver T01.EC1 with four analog outputs and RS 485 interface with MOD Bus protocol

is prevented and the minimum preservability is increased. Even in this process step, the JUMOWtrans wireless temperature sensor enables precise process control in the temperature range of –30...+260°C. In the food processing industry this product processing sequence is applied very often. In the first step, the product is dried, cured and cooked in different temperature chambers and levels. In the second step, the goods are intensively cooled and removed from the process. As the different trucks are individually coded in the food processing industry to guarantee exact allocation of goods to the process steps, the Wtrans transmitters too can be coded. On one hand through the color rings supplied by the customer, on the other hand, through a unique five-digit code. With the help of this code, each transmitter of the Wtrans system can be identified and “linked” with a receiver.

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Topics

RTD temperature probe assembly with built-in transmitter for the pharmaceutical and food industry: JUMO Dtrans T100 With the Dtrans T100, JUMO has developed a new RTD temperature probe with multiple advantages for the user. The system is fully enclosed in a sensor housing and with its EHEDG approval corresponds to the high requirements of these industries. The thread type RTD temperature probe in very compact style consists of a protective tube with integrated temperature sensor, a process connection

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and an attached housing for the transmitter electronics. The following process connections are available: threaded well, Tri-Clamps, adjustable

union styles, flush mount, ball welded sleeve, Varivent® connection. The protective pipe is made of special steel and the protection type of the device complies with the DIN EN 60 529 with inserted machine plug IP 67. The integrated digital two-wire transmitter converts the resistance value into a current signal. The measurement

Topics

range and other necessary or optional parameters can be configured with the help of a setup program. The output signal 4...20mA or reverse 20...4mA is available (temperature linear). The device is designed for industrial use and corresponds to the European standards for guaranteeing electromagnetic compatibility (EMC).

The author Dipl.-Ing. Michael Braun is Product Manager in Temperature Sensor Division An available high temperature model of the Dtrans T100 with thermal extension tube with built-in transmitter can measure up to 260°C (500 °F) – without thermal extension tube –50...+20°C (–58…+392°F). Another model without thermal extension tube and without built-in two-wire transmitter is used for measuring temperatures in the range of –50...+150 °C (–58...+302°F). The electrical connection is provided with a 4-pin plug M12 x1. As sensor elements, Pt100 or Pt1000 temperature sensors are used in two or four-wire configuration. A customer specified factory setting allows the customer to select individual parameters by default.

Areas of application

The RTD temperature probe assembly JUMO Dtrans T100 comes with the EHEDG certification and therefore is well suited for the pharmaceutical and food processing industry. Temperatures must be permanently monitored during the mixing process of individual components for drugs.

Even in breweries and dairies, the devices are a vital requirement for the high product quality demanded in this business sector to manufacture products with a shelf life as long as possible and free of bacteria /contaminants for packaging of products for transportation. Due to extremely precise measured temperatures with the JUMO Dtrans T100, the shelf life of products is determined in the range common for the industry and guarantees a product quality wellknown and appreciated by all of us in the pharmaceutical and food processing industry.

This is where the JUMO Dtrans T100 RTD temperature probe assembly accomplishes its task.

Further info: Internet: http://JI48_02GB.jumo.info e-Mail: [email protected]

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From the field

New controller/ transmitter series for water analysis measurements: JUMO Aquis 500 It is a fact that water is one of the most valuable assets of humankind. It does not matter whether you are talking about drinking water or the water that is a key part of in many technical applications. In all technical applications, it is taken for granted that the water used is of a certain quality in order to accomplish the tasks for which it is intended. In this context, we like to mention rinsing processes and applications where the water is used as heat transfer media in cooling towers. During rinsing processes, special emphasis is put on the

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end and intermediary product. Therefore, for the rinsing result, it is vital that the water has a definite quality and preserves it. These rinsing processes are most applied in basins that are constantly loaded with fresh water. In such processes, often the water quality is measured before and after the rinsing to be able to decide whether all

impurities have been cleaned from a product, or whether there is still some left. Example applications here are those in the semiconductor, pharmaceutical and optical industries, and during the manufacture of parts for the automobile industry. It is obvious that in all these industries water must be very pure.

From the field Electrolytic Conductivity – a measure with many values In drinking water applications it is important to stay within a defined range.

bility to measure the water quality with a simple measurement of the electrolytic conductivity. This procedure is used in many areas, e.g. for the monitoring of drinking water treatment plants and verifying the specifications of bottled water in the Midlle East or in Asia. The importance with which drinking water is evaluated is evident by the fact that organisations such as the WHO (World Health Organisation) and the USEPA (United States Environmental Protection Agency) are doing a lot of work in this area.

Mounting variants of the JUMO AQUIS 500 CR

offers individual solutions. By simply selecting the “TDS measurement” function, the JUMO AQUIS 500 CR – a transmitter/controller for liquid analysis – is switched to this special measurement mode. Contrary to low-cost devices that utlize only a fixed factor, this factor can be freely entered into the JUMO AQUIS 500 CR and therefore adjusted exactly to the actual available conditions. The available temperature compensation (linear or according to “natural water” in compliance with DIN EN 27888 ISO 7888) that can be adjusted to the real conditions quite easily, enables an exact measurement even at different temperatures.

The author Dipl.-Ing. Reinhard Manns is Product Manager for measuring transducers and applications in the Water Analysis and Measurement Engineering division The drinking water must not be tasteless and must not pose problems during daily use (washing clothes, rinsing). In such cases, the water hardness is used for this analysis. Hard water causes problems when washing clothes, it is “hard” to work with it. On the other hand, too soft water can cause corrosion. All these issues can be controlled by measuring a parameter. This parameter is the electrolytic conductivity. In the European market for example the unit of measure uS/cm or mS/cm is widely used. In the American-dominated area, the TDS measurement (Total Dissolved Solids) is achieved with the unit ppm or mg/l. This entails all soluble conductible substances (e.g. mobile charged ions, minerals, salts and dissolved metals) in a defined volume of water. The higher the concentration of these substances, the higher the electrolytic conductivity or the TDS value. The relationship between electrolytic conductivity and TDS value is given through a factor. This factor fluctuates in the range of approx. 0.55 to 1.0. As the actual factor depends on the real composition of the water, it is ideally determined through a lab test. A general, normal value for drinking water is 0.67. This relationship opens up the possi-

These organisations recommend the following values for drinking water: WHO < 1000mg/l USEPA < 500 ppm

The solution: Transmitter/controller JUMO AQUIS 500 CR The JUMO product line “Water Analysis measurement technology” also Water

User friendly programming by simply following displayed text messages and a flexible hardware structure make this device especially suitable for such applications. Of course, besides the TDS measurement even the other methods of measuring/controlling electrolytic conductivity and resistivity are possible.

Further info: Internet: http://JI48_03GB.jumo.info e-Mail: [email protected]

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From experience

Automatic changeover to backup temperature controller During temperature control of an electrically heated melting bath, faults must be taken care of without interruption and without affecting the process. This means that the process is not affected by the failure of a temperature sensor, controller or thyristor power regulator.

Solution In this application, three dual thermocouple elements are used for the temperature control. The electric heating is divided into four separately fused thyristor power regulators on the power supply side. For the temperature control, two JUMO IMAGO 500 multi PID loop controllers are used. One controller actively takes over the control action. The other controller stands by as backup controller for automatic continuation of the regulation in case of fault. The customer uses the term Master for the main controller and Slave for the backup controller.

an external relay with single pole double throw contact with the four thyristor power regulators. Therefore, the output of the active controller acts in parallel to the four thyristor power regulators. As a result, if a regulator fails, 75 % of the regulating range is still available. Via two separate single pole single throw at the external relay, Master and Slave are toggled between automatic and manual operation. In standard mode, the Master controller is in automatic mode and takes over the control action.

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Conditions for automatic changeover to Slave controller: auf ■ Failure of more than one temperature sensor ■ The (selected) temperature signals with the shortest difference differ from each other too much ■ Power failure or internal fault in Master controller ■ Failure of output signal from Master controller (detected by Master)

Description of function From the two JUMO IMAGO 500, separately from each other, a two-outof-three selection will be made with ultimate mean value computation. This means: Of the two temperature sensor signals with the lowest difference to each other, the arithmetical mean value is calculated and transmitted as actual value to the controller. The setpoint of the Master controller is retransmitted to a 2-10 Volt analog output signal for monitoring purposes and in addition is transmitted as manual setpoint to an analog input signal of the slave. The controller outputs of Master and Slave are connected via

put signal of the Master as manual control input signal. Thus, the control action can be taken over from the Slave controller without interruption in case of fault. The relay outputs from the master, which actuate the external relay, automatically switch over to the Slave controller in case of a fault.

The author Martin Schaub is in Technical Support and is responsible for controllers, regulators, system and recording/data acquisition and water analysis measurement technology The Slave controller is in manual mode and constantly receives the control out-

If the changeover condition is no longer necessary, it automatically switches back to the Master controller. The changeover output of the Master controller is turned on delayed to guarantee a correct control output signal transfer by the Slave controller even if there is power failure in the Master. To achieve higher safety, the changeover from Master is enabled via two outputs that are switched in series externally. Master and Slave controllers signal when an error occurs through relay outputs. Consequently, an easier error that does not as yet affect the process can be detected and rectified.

From the field Display views

Controller in standard mode

Controller with fault

Meaning of logic signals: Reg M or S displays who is acting as controller right now. Fault If there is a fault that renders impossible a control action, an alarm bell appears. In addition, a warning message is triggered via relay output. If there is no fault, a smiley appears. Warning A warning triangle indicates a fault that has not yet affected the regulation. If everything is OK, a smiley appears.

Block diagram

Conditions for error message by Master controller: ■ The three measured temperatures vary from each other too much ■ A temperature signal is outside the measurement range ■ Control output signal from Slave is outside 2...10V ■ Control output signal from Slave varies too much and too long from the retransmitted output signal of the Master

Conditions for error message by Slave controller: ■ The three measured temperatures vary from each other too much ■ A temperature signal is outside the measurement range ■ Power failure or internal fault in Slave controller ■ Retransmitted control output signal from Master is outside 2...10 V

E1 to E3 Besides the codes E1 to E3 for the inputs, a green circle is displayed in standard mode. In case of fault, the color of the circle changes to red for the affected input. Therefore, you can immediately detect which input signal is in fault.

Further info: Internet: http://JI48_04GB.jumo.info e-Mail: [email protected]

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From the field

New web technologies for online visualisation of process data

With further development of the LOGOSCREEN nt, JUMO is offering a paperless recorder with web server for the first time, which will allow the user online visualisation of process functionality data on the PC, in addition and independent of on-site visualization right on the unit display. What we would like to show here is that the programmers did not come up with a new game, but rather a highly valuable functional extension to the benefit of the user. For visualisation of process data, the LOGOSCREEN nt has a 5.5" TFT display with a resolution of 320 x 240 pixels and 256 colors. Well readable and easy to use with a single turn & push knob, the device meets all requirements for onsite visualisation. Until now, online visualisations of process data were outside the production process and always associated with considerable effort. With the inclusion of a web server in the device, now it is pos-

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sible to recreate the entire visualisation of a paperless recorder in a web browser (Internet Explorer 6.0 or 6.1). By simply selecting the website saved in the device, the online visualisation, i.e. the display of current measured data on the PC, is started. The visualisation on PC essentially corresponds to that on the device and even the operation greatly resembles that on the device. Both measured value curves and bar

graph and text images are displayed, whereby unlike the solutions until now, no screenshots, rather only measured data is transmitted, which considerably reduces the transmitted data quantity. This enables a quick query of the measured values and results in less load on the network, which network administrators will be happy to learn. With the networking of one or more LOGOSCREEN nt with a PC, the current measured data can be tracked directly on the PC, without affecting individual devices on site. Many users will also find interesting the display of various applications on one screen, through which various processes can be monitored simultaneously. Changes in the online visualisation in

From the field the display of the measured data on PC is likewise handled completely by the browser. Even here, the transmitted data volume is reduced, because no screenshots need to be downloaded, rather only process data for the current display. While other manufacturers have the operation on PC in parallel to operation on the device, in JUMO devices, the use on PC and on the device is possible simultaneously and independent of each other. Thereby, access via Ethernet of a maximum of five users is permitted simultaneously.

All this is possible with web technologies such as Java Script®, Ajax® and the likewise web-based graphics format SVG® (Scalable Vector Graphics). The core of the JUMO online visuali-

sation lies in the fact that on starting the online visualisation, first the configuration part required for forming the window is read from the device. This configuration part is saved in the browser and is available for the duration of use (need not be downloaded). After reading the configuration, which takes only a few seconds, the browser can use the same settings as in the device. This enables quick changeover between the display types without a waiting period (curve display, bargraph, text etc.) and the groups. The desired group or display is shown after selection and can be immediately filled with the current process data. Notes on installation of online visualisation using setup software are available on request at www.jumo.net.

Further info: Internet: http://JI48_05GB.jumo.info e-Mail: [email protected]

The authors

Dipl.-Ing. Helmut Lysniak is Product Manager for recording/ data aqcuisition devices in the area of measurement technology

Sebastian Schäfer is studying at the Fulda Elektrotechnik University and during his traineeship at JUMO worked with this topic

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DAN

From the field

MARK

Oresund bridge In winter, there are numerous problems with ice deposits on the protective casing of the rope made of high-density polyethylene, as during sunshine, ice pieces fall on the road. For a test project, JUMO temperature sensors were selected. They help measure the surface temperature of the rope and to determine the temperature influence on the air temperature and relative humidity. For the future, one has zeroed in on setting up

Climber fixing JUMO temperature sensors

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a safety warning system. Now, instead of placing the temperature sensor on the ropes, a model was prepared that had the same angle and size as the rope. This was placed on the tip of one of the towers (see above picture). Then, holes were drilled in the safety casing and a number of temperature sensors were fixed at various starting angles to the surface. In addition, holes were drilled in the concrete floor and temperature sensors too were installed on it, which are aligned in all directions of the sky. The temperature sensors are connected with a measured data logger that saves the temperature for subsequent analysis. It is possible that in future, the data logger will transmit the temperature information for evaluation via the glass fibre cable on the mainland. As a result of this test phase, we expected information for an action plan that will stipulate how formation of ice on the main rope can be prevented and what to do if this occurs. JUMO Sweden supplied all 31 sensors for this project. The rope model is fixed on the tip of the left tower in the direction of Sweden (see red circle).

In 1991, the governments of Denmark and Sweden agreed to build a bridge across the Oresund to connect the two countries. The 16 km long Oresund link between Denmark and Sweden is now complete. The project was opened for traffic in the Summer of 2000. The Oresund bridge is the longest single bridge in the world designed for both road and rail traffic. During construction, the concept of repetition was successfully realised, as the biggest section of the bridge consists of identical widths. The viaduct with the record-breaking main rope span of 490m is so built that it is structurally and aesthetically in harmony with the approach bridges. Thanks to the generous use of prefabricated parts and the installation of large units, the activities on site could be completed in only 2 ½ years. Technical Data Main span: Total length: Viaduct length: Distance: Tower height: Width:

490 m 7845 m 1092 m 57 m 203,5 m 23,5 m

From the field FRA N C E

“JUMO ensures a comfortable climate!” In the “State room” of the Louvre museum in Paris, where the famous “Mona Lisa” by Leonardo da Vinci is exhibited, the room temperature and humidity is measured with JUMO devices.

Did you know?

In all, 12 humidity and temperature transmitters are installed in the room in stem version. In each corner of the room, at two and four meter height respectively, two humidity and temperature transmitters, type 907021/40 with 0-10-V-output have been installed. In the Mona Lisa showcase, four humidity and temperature transmitters are installed. This model was preferred due to its precision and reliability.

In addition, these combined devices for humidity and temperature are distinguished by excellent longterm stability and high humidity performance and good chemical resistance. The output signals are connected to a Johnson Control automatic device that handles the air-conditioning for the room. Mona Lisa’s smile is probably because she feels quite comfortable – thanks to the JUMO devices.

The painting is 76.8 × 53 cm and was probably created between Spring of 1503 and Summer of 1505. Leonardo sold thezwölf painting to King Insgesamt sind HygrothermoFranz Iinshortly before his death. In geber, Stabausführung, im Raum the following period, the painting fiinstalliert. Versailles part ofin Innally jedercame Ecketodes Raumes,asjeweils the und collection of Ludwig zwei vier Metern Höhe,XIV. sindAfter zwei the French Revolution, Mona Lisa Hygrothermogeber, Typ 907021/40 got0-10-V-Ausgang a new home at the Louvre. Namit montiert. took der it out fromLisa there Inpoleon der Vitrine Mona sindand vier hung it in his bedroom. After his exile, Mona Lisa returned to the Louvre. (Source: Wikipedia)

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Products + Services New

New

New

JUMO SVS3000 Plant Visualisation Software

JUMO heatTHERM-AT new thermostat series

JUMO di308 – The new digital indicating instrument

High application flexibility and PushIn® connection technology are the essential features of this new series of electromechanical thermostats. The housing is suitable for all common mounting types such as wall, immersed thermowell and surface mounting.

The multitext display with programmable color change displays the process alarm in plain text when limit values are exceeded. Alarm text messages can also be displayed with a maximum of 24 characters as a moving display. Two logic inputs / outputs, two relay outputs as well as a setup/configuration interface are already available in the basic version.

Further info:

Further info:

Further info:

Internet: http://JI48_06GB.jumo.info e-Mail: [email protected]

Internet: http://JI48_07GB.jumo.info e-Mail: [email protected]

Internet: http://JI48_08GB.jumo.info e-Mail: [email protected]

“Visualisation and Documentation made easy” is the slogan of the SVS3000. A user-friendly interface and many functions were integrated to achieve this: Application Explorer, continuous recording and batch documentation, alarm and event lists, recipe function etc.

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Innovatio

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Innovatio

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Innovatio

Product expansion JUMO BlackLine LF-GT

Product expansion JUMO Multitrode

After few changes, now all versions of the conductivity measuring cells are available once again. The conductivity transmitter series JUMO ecoTRANS Lf together with these conductivity cells form a powerful and cost efficient measuring system, e.g. for cooling tower monitoring, drinking water control and reverse osmosis systems.

The JUMO Multitrode was fully reworked and now offers the user new options when sensing the values for pH, ORP (redox) and temperature. – Annular gap diaphragm for clog-free measurements – Solid electrolyte with self-cleaning effect – Reliable measurement even under severe conditions

Further info:

Further info:

Further info:

Internet: http://JI48_09GB.jumo.info e-Mail: [email protected]

Internet: http://JI48_10GB.jumo.info e-Mail: [email protected]

Internet: http://JI48_11GB.jumo.info e-Mail: [email protected]

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JUMO CTI-750 now available with conductivity immersion probe made of PVDF The flexibility of the inductive conductivity analyzer / transmitter opens up new areas of application. Before, some of these applications (e.g. immersion in a container) could be accomplished only under limited conditions. These installation specific applications are now possible with the new immersion probe that is fully manufactured from chemically resistant material PVDF (Polyvinylidenfluorid).

Group of Companies AN Y G ERM

The JUMO Group of Companies has 6 branches in Germany, 20 subsidiary companies abroad and over 40 agencies world-wide. Close contact with the foreign subsidiaries and agencies is extremely important for JUMO to specifically strengthen and continuously expand the international markets. Especially because of this, last year, JUMO conducted two international workshops. Participants came from the subsidiaries and agencies in different countries. In September and October, JUMO welcomed employees to a oneweek training session on new products. The participants came predominantly from the Asian and Arab region, the

Baltic States, Russia and USA and the African and European countries. Training Manager, Manfred Schleicher and Managers of individual product lines explained to participants the structure and essential functioning of the latest JUMO products. The workshop included devices and systems for analysis and pressure measurement

technology, controllers and screen recorders. Practical exercises on the devices and their use and application were obviously at the forefront. Because only if the employees understand the areas of application of JUMO devices precisely on site, can they successfully market and sell these products in their own countries. The subsequent increase in export orders helps secure more than 1100 jobs on the long term at the East Hessian unit.

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Group of Companies

Electronic measuring Upon entering the electronic pressure measurement market JUMO established an independent department 25 years ago. Reason enough to take a look at its history once again.

Pressure transducer 4AI-50

Pressure sensor 4AP-26

Today, electronic pressure measurement instruments are taken for granted in several areas of automation technology. But in 1981, entry into this new field was a bold step, which in retrospect proved to be a correct and extremely successful decision. Before 1981, JUMO has been supplying mechanical pressure measurement instruments for a long time (in those days, under the company name M. K. JUCHHEIM). This primarily included pressure gauges. That are still used even today. The introduction of electronic pressure measurement technology was the starting point for establishing an independent department for pressure measurement instruments. By means of some milestones, we can understand the final development of the modern pressure measurement technology.

Innovative sensor technology

Pressure transmitter JUMO dTRANS p02

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The first product of the new type, the pressure transducer 4AI-50, used an inductive measuring system, as is still used today in the modernised form, especially for small measuring ranges. Soon thereafter, a piezoresistive pressure sensor was also used for the first time in the pressure sensor 4AP-26. This was the predecessor of the wellknown pressure transmitter 4AP-30, from which the current success series JUMO dTRANS p30 was created. The piezoresistive sensor technology

based on semiconductor technology over the years has developed into one of the most important measurement technologies. Today, JUMO not only applies this technology in its pressure transmitters / transducers, but also supplies these semiconductor sensors to other manufacturers of pressure measurement instruments and to OEM customers.

The author Dr. Thomas Reus is Product Manager for Pressure Measuring Technology Over the course of time, the clientele has grown and with that also the variety of pressure sensors used. Today, besides piezoresistive and inductive pressure sensors, mainly thin-film sensors, thick-film sensors and ceramic-capacitive sensors are used. With this, JUMO has become a universal supplier that can offer the optimum solution for all types of industrial pressure sensing tasks.

Group of Companies

pressure g devices Pressure transmitter JUMO dTRANS p30 Modern semiconductor sensors form the basis for many pressure measurement instruments

Digitalisation In 1999, a new chapter was opened with the pressure transmitter series JUMO dTRANS p02. In this series, for the first time, digital microprocessor technology was used. This meant higher measuring precision, digital interfaces and on site display in LCD technology. In the meantime, microprocessors are also used in other pressure instruments, e.g. in the CANtrans series. Here, the measuring signal is no longer transmitted analog in the form of standard signals, rather it is fed directly into a field bus system digitally.

Miniaturisation The latest success story of the anniversary department is JUMO MIDAS, a new series of smaller and especially more robust pressure transmitters. Since 2002, these devices are being manufactured in large numbers and primarily serve OEM markets, e.g. automotive or compressors. A special technological feature of MIDAS devices

comprises the electronics used which enables a largely automated production and calibration technology. Through this, the highest measure of quality and cost efficiency is achieved for large and small quantities. Otherwise, modern MIDAS production is a fine example of how the use of good ideas ensures that products will continue to be “Made in Germany”.

Pressure transmitter JUMO CANtrans

What does the future bring? This ultimately depends on our customer's wishes, as JUMO develops innovative products according to the market requirements. It cannot be predicted whether or when new technologies, e.g. wireless pressure instruments, will be established, in what scope and in which part of the globalised market. But one thing is certain: With over 25 years of experience in pressure measurement instruments and with the capability to meet the customer's needs, JUMO will remain on the success track even in future.

Pressure transmitter JUMO MIDAS

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Important to know

Too many choices Selecting the suitable diaphragm for the pH/ORP measurement

An important question during pH/ ORP measurement is the right choice of diaphragm for separation of the half cells. Hereby, we can still describe the glass electrode – even in the combination electrode version – as the most effective sensor that can cover the entire bandwidth of the pH scale. Glass electrodes have good chemical and mechanical resistance and can be used in most media. In their modern construction, the sensors are so robust that even the most feared fragility of glass presents no problem for most applications. Because in spite of all technical possibilities, in glass electrodes and ISFET sensors, the diaphragm is still the weak point in measurement. Therefore, below we want to provide the user with information on the correct choice of the diaphragm.

Structure of electrochemical sensors The sensors can consist of simple glass electrodes that must be connected with a reference electrode for measurement. However, this arrangement is not used too often today. In the meanwhile, the use of single stem measuring chains is becoming popular.

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A combination electrode consists of two half cells: the glass or metal electrode and the reference electrode. The glass and metal electrode delivers a potential depending on the measurement solution. The potential of the reference system remains constant. The difference between the two potentials determines the electrical signal of the sensor, which is described as measuring

circuit voltage. The electrical connection between the reference electrolyte, reference system and the measurement solution is produced through the diaphragm.

What is a diaphragm? The word diaphragm is derived from two Greek words Dia (through) and Phragma (fencing, border) and is generally used to describe a porous partition that e.g. separates the anode and cathode space during electrolysis. During pH / ORP measurement the diaphragm has to accomplish the following tasks: ■ the electrical resistance of the diaphragm must be very small ■ it prevents the mixing of the reference electrolyte with the measuring medium

Important to know

The components of electrodes (half cell designs) and combination electrodes

It is not always easy to accommodate these two requirements.

outflow of electrolyte must be as low as possible to maintain the life span of the electrode as long as possible.

as well. In compliance with DIN 19 264, this resistance is limited to 5kOhm.

Diaphragms / Junctions The connection between the reference electrolyte and the measuring medium can be established through diaphragms and open junctions.

Types of diaphragms

Diaphragms

■ Platinum

The use of open junctions is less suitable for application in industrial measurement technology. Although the electrolyte outflow can be adjusted in such a way that you can work an entire day – for use in online measurements, this is not particulary beneficial. A possibility to work with open junctions is provided by the combination with a solid electrolyte. We will talk about this application later in more detail. Open junctions are very reliable, however, they are not suitable for routine and continuous measurements. During continuous measurements, the

■ Slot

Depending on the application, you have the following types of diaphragms: ■ Ceramic

■ Fiber/glass fiber The author Ulrich Braun is Product Manager for sensor technology in the Analysis Measurement Technology division The connection between the reference electrolyte and the measuring medium is separated here with a diaphragm. With the installation of the diaphragm, the electrical resistance increases

■ Plastic ■ Annular gap/perforated ■ Sintered/fritted glass ■ Capillary Sintered/fritted glass and capillary diaphragms are not used in industrial measuring technology. They serve here only to complete the description.

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Important to know Ceramic diaphragm

Slot diaphragm

Ceramic diaphragms are particularly known in industrial measuring technology. You find them exclusively in electrodes with a glass shaft. They consist of about 1mm thick, porous ceramic pin that is fused into the reference electrode or the combination electrode.. Either liquid KCl or KCl gel can be used as reference electrolyte. The electrodes have only a very low outflow of electrolyte solution (approx. 0.05ml/d). A disadvantage of the ceramic diaphragms is that they are prone to impurities. The hollow spaces inside the diaphragm are excellent nesting places for substances that are either produced from chemical reaction or diffused in through the measuring solution. Therefore, ceramic diaphragms are suitable only for clear, aqueous media, e.g. swimming pool water. Electrodes with ceramic diaphragms can also be used for uncontaminated drainage water.

The ground diaphragm is the most well-known slot diaphragm. The electrolyte here flows through a hole into the ground core between the ground surfaces. Generally, these electrodes are mostly operated with liquid KCl as reference electrolyte. The roughness of surfaces provides for the contact between the reference electrolyte and the measuring solution. The outflow of electrolyte in this type of diaphragm is very high at approx. 2ml/d. Through pressure on the surfaces, the outflow of electrolyte can be influenced. To keep the outflow as constant as possible, it is recommended to fix the surfaces. If the parts are laid out loose, the outflow speed is reproduced rather slow and the measurements can be highly inaccurate. Any contamination here can be removed by loosening the surfaces slightly. Ground diaphragms are used for precision measurements in laboratories. In industrial measurements of the pH value in media with low ion (e.g. highest grade water, VE water), the use of ground diaphragms has been tried and tested.

Platinum diaphragm Plastic diaphragm

The platinum diaphragm is made of fine platinum wires that are twisted together. They have a diameter of only 0.03mm. Unlike ceramic diaphragms, platinum diaphragms have smooth channels and thus necessarily a somewhat larger outflow of electrolyte solution. In section, this is about 0.2ml / d. On average, either liquid KCl or KCl gel is used as electrolyte solution. The risk of contamination is definitely less than in ceramic models. Nevertheless, electrodes with platinum diaphragms must be used only in clear, aqueous, uncontaminated solutions.

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For use in highly contaminated media, the use of plastic diaphragms has proven excellent. Here one mostly works with a circular diaphragm made of Teflon (PTFE). Due to the smooth surface, waste or dust particles can not stick here. As reference electrolyte, KCl gel is particularly suitable. Electrodes with Teflon circular diaphragm are hence especially suitable for application in highly contaminated media (waste water treatment), media containing sulphide or in drainage water

containing varnish (paint pigments). Even here, the JUMO-tecLine series offers suitable electrodes for these measurements. A disadvantage of the Teflon circular diaphragms is that with long term use in a medium that has a memory effect, i.e. when changing from one medium to the other, the electrode notes the old pH value for a long while. This effect can be avoided by soaking the electrode in another medium overnight in 3-molar KCl solution before rense.

Open junctions Annular gap diaphragm

Annular gap and perforated diaphragms are excellent in connection with solid electrolyte electrodes. The reference electrolyte consists of a polymer gel. This gel forms a permanent, compact non-fluid mass. By adding solid KCl to the polymer, you get a supersaturated solution. The leaching effect can be detected from the anti-clouding of the polymer gel. Through contact with the measuring medium, a self-cleaning effect occurs due to the swelling of the gel, which prevents penetration of impurities and electrode toxins into the electrode. Together with the appropriate membrane glass types, annular gap and perforated diaphragm electrodes can also be used in critical media with increased temperature (HT glass) or in media with high contamination and electrode toxins (sulphides, ammonia, coating forming substance etc.). Verdict: The right choice of diaphragm can decide the functioning or non-functioning of pH measurement. Together with the suitable pH electrode, both components form one unit and the user decides on the good interaction of the two. Further info: Internet: http://JI48_12GB.jumo.info e-Mail: [email protected]

Events

JUMO at trade shows and exhibitions NefteGas Kasan/ Tartastan 11 to 13/09/2007

CIBUS TEC Parma/Italy 17 to 20/10/2007

AHR New York City/ USA 22 to 24/01/2008

Miconex 2007 Shanghai /China 13 to 16/09/2007

K Düsseldorf/Germany 24 to 31/10/2007

HANNOVER MESSE Hanover/Germany 21 to 24/04/2008

VA Göteborg/Sweden 18 to 20/09/2007

SCS AUTOMATION & CONTROL Lyon/France 13 to 16/11/2007

interpack Düsseldorf/Germany 24 to 30/04/2008

ELTECH Plovdiv /Bulgaria 24 to 29/09/2007

BRAU Beviale Nuremberg/Germany 14 to16/11/2007

IFAT Munich/Germany 21 to 24/04/2008

MSV Brünn/ Czech Republic 01 to 05/10/2007

POLEKO Posen/Poland 20 to 23/11/2007

SENSOR+TEST 2008 Nuremberg/Germany 06 to 08/05/2008

Elektrotechniek Utrecht/Netherlands 01 to 05/10/2007

NefteGas Perm/ Russia 20/11/2007

TechnoPharm Nuremberg/Germany 30/09 to 02/10/2008

Scanautomatic Göteborg /Sweden 09 to 12/10/2007

Polutec Paris/France 27 to 30/11/2007

PA Lillestrøm /Norway 09 to 11/10/2007

SPS/IPC/DRIVES Nuremberg/Germany 27 to 29/11/2007

Further info: Internet: http://JI48_13GB.jumo.info e-Mail: [email protected]

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International locations Argentina Sensotec SA Av. Avenida de Los Constituyentes 4631 C1431 Exl. Buenos Aires Australia Remtron Pty. Ltd. Unit 12/2 Sibthorpe Street 3195 Braeside Victoria Austria JUMO Mess- und Regelgeräte Ges.m.b.H Pfarrgasse 48 1230 Wien Bangladesh Ahsan Automation LTD. GPO Box no. 3062 14/1, New Eskaton Road (3rd. Floor, west) 1000 Dhaka Belarus System Analysis S Ltd. Mogilyovskaya Str. 14 220039 Minsk Belgium / Luxembourg JUMO Automation S.P.R.L. / P.G.M.B.H. / B.V.B.A. Industriestraße 18 4700 Eupen Brasil DIGITROL Industria e Comercio Ltda. Rua Santo Arcadio, 91 Brooklin Paulista 04707-110 Sao Paulo Bulgaria JUMO Izmervatelni uredi i Regulatori Juryi Gagarin Str. 22 A Office 11113 Sofia Croatia JUMO Mess- u. Regelgeräte Ges.m.b.H predstavnistvo Varazdin Dragutina Domjanica 6 42000 Varazdin Colombia C4 Control de Contaminación Ltda. CL 13 # 27 A 05 Acopi Yumbo Denmark JUMO Mäle- og Reguleringsteknik A/S Fabriksvaenget 16, Postboks 80 4130 Viby SJ Ecuador Elicrom Cia. Ltda. Edificio Professional Center Officina 409 Av. Juan -Tanca marengo Km 1.2 s/n y Av. Joaquín Orrantia Guyaquil Egypt AEE Co. -Advanced Electronic Engineering 26, Rabaa Bldgs – Nozha Str. Nasr City-Cairo Estonia AS SAKALA TÖÖSTUSAUTOMAATIKA Kallaste keskus 9 76901 Tabasalu Finland Kübler Suomi Oy P.O. Box 225 01301 Vantaa (Hakkilankaari 9 01380 Vantaa)

France JUMO Régulation SAS Actipôle Borny 7 Rue des Drapiers B.P. 45200 57075 Metz- Cedex 3 Greece/Cyprus UTECO A.B.E.E. 5, Mavrogenous Street 18542 Piraeus Guatemala Prestelectro Apartado Postal 976-A 01909 Ciudad de Guatemala Hong Kong CBH COMBUTECH CO. 23, Lychee Road East Fairview Park Yuen Long Indonesia PT Arianto Darmawan Hegarmanah 63 Bandung-40141 Iran Es Pi Daad Co. Ltd. P.O. Box 11155-4344 15337744931 Tehran Iceland Tölvusalan EHF Skulagata 30, 4.h. 101 Reykjavik Israel Michshur S.Z. (1984) Ltd. Measurement & Control Instruments 24 Hamezuda St. P.O. Box 56 58001 Azur Italy JUMO Italia SRL Via Carducci, 125 20099 Sesto San Giovanni (MI) Jordan Control Links Engineering Co. P.O. Box 2773 11953 Amman Kazakhstan JUMO AB Kazakhstan Gogol street, 86 Office 222 050000 Almaty Kuwait Digitronix Electrical Control Est. P.O. Box 42083 70651 Shuwaikh Industrial Area Latvia KLIVA Ltd. 12/5-16 Ozolciema Str. 1058 Riga Lithuania INKONSA & PARTNERS, Co. Baltupio 101-8 2057 Vilnius Malaysia BAKAT Industri Sdn. Bhd. No. 1, Jalan TPP 5/14, Taman Perindustrian Puchong,Section 5 47100 PUCHONG, Selangor Darul Ehsan Maroc SEMRE-Société d’ÉlectroMécanique et de Régulation 91 Nlle Z.I. Mohamedia Mohamedia/Casablanca

Mexico Romapsa S.A. de C.V. Circuito Valle Hermoso No. 28 Loma de Valle Escondido 52930 Atizapan de Zaragoza

Republic of India Forbes Marshall Pvt. Ltd. A-34/35 MIDC Estate „H“ Block, Pimpri Pune 411 018

Nexon Mexico SA de CV Gonzáles Lobo No. 893 A Esquina con Abasolo, y Valdez Sánchez Colonia República Oriente Saltillo, Coahuila, MEXICO C.P. 25280

Saudi Arabia JUMO GmbH & Co. KG Middle East Office Gold & Diamond Park Bldg. No. 5, Office No. 220 Sheikh Zayed Rd. Dubai

Netherlands JUMO Meet- en Regeltechniek B.V. Rijnkade 18 1382 GT Weesp Norway JUMO AS Postboks 210 Solheimveien 50 1471 Lörenskog People’s Republic of China JUMO Automation Dalian Co. Ltd. Building 9-2, No. 29 Dongbei Sanjie, Dalian Development Zone Dalian 116600 Pakistan M. Khalil Enterprises Distribution & Control Baghpatee Chamber Altaf Hussain Road Karachi 74000 Peru Marvitech Representaciones S.A.C. Av. San Luis 1871 Of. 304 San Borja Lima 41 Philippines Wise-Man Automation & Controls, Inc. No. 715 St. Mary Street, Holy Family Village Bagum Bayan, Taguig City Taguig City 1632 Poland FONSECA S.A. Instrumentacao e Energia Rua Joao Francisco do Casal, n° 87/89 - Esgueira - P.O. Box 3003 3801-997 Aveiro Portugal Marvitech Representaciones S.A.C. Av. San Luis 1871 Of. 304 San Borja Lima 41 Republic of Chile Veto y Cia Ltda. San Eugenio 567/Nunoa Santiago de Chile Republic of Korea JUMO Korea Co. Ltd. # 607 Sinwon Vision Tower 898 Hogye 2 dong, Dongan-Gu 431-836 Anyang-Si, Kyeonggi-Do Romania S.C. JUMO Romania S.R.L. Calea Aurel Vlaicu Nr. 28-32/C 310159 Arad Russia JUMO GmbH Marksistskaya, 34/8 109147 Moscow JUMO Office St. Petersburg P.O. Box 61 198103 St. Petersburg

Sweden JUMO Mät- och Reglerteknik AB Lilla Garnisonsgatan 33 25467 Helsingborg Switzerland JUMO Mess- und Regeltechnik AG Laubisrütistrasse 70 8712 Stäfa Serbia/Montenegro JUMO Mereni i regulacioni uredajaj Petrovaradinska 20/8 11000 Beograd Slovakian Republic JUMO Slovensko s.r.o. Puchovska 8 831 06 Bratislava Slovenia JUMO merilni in regulacijski aparati Podružnica Maribor Pekrska 6 2000 Maribor Spanien JUMO Control S.A. c/ America, 39 08041 Barcelona JUMO Control S.A. Valle de Tobalina, 18 n°1 28021 Madrid South Africa ASSTech Process Electronics Instrumentation cc 2153 Jukskei Park USA JUMO Process Control, Inc. 8 Technology Boulevard Canastota, NY 13032 United Kingdom/Ireland JUMO Instrument Co. Ltd. JUMO House Temple Bank, Riverway Harlow -Essex CM 20 2TT