DIGITAL TRIPLE AXIS EMF METER WITH DATA LOGGING MICRO SD CARD USER’S MANUAL

EMF1394DL Please read this manual carefully and thoroughly before using this product.

TABLE OF CONTENTS Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Key Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 What’s In the Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 – 5 Setup Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 – 6 Install Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 – 6 Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 – 12 Measuring Real-time EMF Intensity . . . . . . . . . . . . . . . 6 – 8 Displaying Maximum and Minimum Triaxial Readings . . . 8 Storing and Recalling Readings Manually . . . . . . . . . . 8 – 9 Automatic Data Logging . . . . . . . . . . . . . . . . . . . . . . . 9 – 12 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Operating & Maintenance Tips . . . . . . . . . . . . . . . . . . . . . . . . . 14 Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 – 15 Return for Repair Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

INTRODUCTION Thank you for purchasing General Tools & Instruments’ EMF1394DL Digital Triple Axis EMF Meter with Data Logging MicroSD Card. Please read this user’s manual carefully and thoroughly before using the product. The EMF1394DL is ideal for measuring the intensity of electromagnetic and magnetic fields produced by power lines, industrial machinery, and home appliances (computer and TV monitors). Although some studies suggest a link between long-term exposure to electromagnetic fields—especially extremely low-frequency (ELF) fields—and cancer or childhood leukemia, there are currently no standards defining recommended or permissible exposure levels. However, until evidence disproves the health risk of EMF/ELF exposure, common sense suggests minimizing exposure on a daily basis. 2

KEY FEATURES • Uses three orthogonal sensors to measure field intensity independent of angle • Displays readings in microTeslas (μT) or milliGauss (mG) • Internal memory for manual storage of up to 99 three-axis readings • Included 4GB MicroSD card for automatic logging of thousands of readings • Triple readout 3-1/2 digit LCD • Autoranging or manual ranging • Min/Max memory + data hold • 15-minute Auto Power Off (can be disabled for data logging) • Flip-up stand • CE and RoHS approved • 1-year limited warranty

WHAT’S IN THE PACKAGE The EMF1394DL comes in a box along with Windows-compatible data logging software on CD, a pre-installed 4GB MicroSD card, a cable with a full-size USB plug at one end and a mini-USB plug at the other, six “AAA” batteries and this user’s manual.

PRODUCT OVERVIEW The figure on the next page shows the locations of the meter’s front-panel controls and indicators, two jacks on top, and battery compartment and MicroSD card on the back. Familiarize yourself with the locations and functions of these components before moving on to the Setup Instructions and Operating Instructions.

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BACK OF UNIT



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 Triple readout LCD. In normal display mode, upper readout shows total (triaxial) EMF intensity and lower readouts show current day and hour and current minute and second. In alternate display mode, upper readout shows field intensity on x axis and lower readouts show field intensity on y and z axes.  (Power) button. Press and hold for at least 3 seconds to power meter on and off.  H button. “Freezes” displayed EMF reading(s). Also used to disable Auto Power Off (APO) function.  MX/MN button. Used to show highest (maximum) and lowest (minimum) value of triaxial EMF intensity measured since meter was last powered on.  G/T button. Toggles between microTeslas (μT) and milliGauss (mG) units of EMF intensity.  Range button. Used to exit Autoranging mode and select one of three available manual ranges.  SET button. Toggles between normal and alternate display modes. Also used to set data logging sampling time as well as currrent day and time. 4

MEM button. Used to: a) Manually store displayed reading(s) in meter’s internal memory at indicated location number; b) Begin automatic logging of three-axis EMF readings onto MicroSD card at selected sampling time, and c) Erase contents of meter’s internal memory and contents of MicroSD card.

READ button. Recalls manually stored EMF readings in chronological or reverse chronological order.  Arrow (
,   and ) buttons and ↵ (enter) button. Arrow buttons used to: a) Navigate memory locations; b) Change sampling time and day and time values; and c) Move left and right between day and time fields. Enter button used to: a) Save settings; b) Enter day and time setting mode; and c) Exit automatic data logging and internal memory read modes. Mini-USB jack. For exporting data logs stored on MicroSD card to PC.

Jack for optional AC adaptor  4GB MicroSD card (under batteries)  Battery compartment  Hinges of flip-up stand

SETUP INSTRUCTIONS INSTALL BATTERIES

1. Turn the meter over and lift the flip-up stand. Carefully squeeze its arms toward each other just below the stand’s hinges (Callout 15 of figure on the previous page) until the pin at the end of each arm comes out of its mounting hole on the housing. Remove the stand and set it aside. 2. Use a coin (a dime or a penny) or a flat-head screwdriver to loosen the single screw securing the battery compartment cover (Callout 14). Remove the screw and cover and set them aside. Take care not to lose the screw. 3. Before you install the batteries, carefully lift the top half of the paper strip with battery markings exposed by the removal of the battery compartment cover (see top right photo). Note the MicroSD card pre-installed in a metal bracket underneath (see right photo).

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4. Return the top half of the paper strip to its original, flat position. 5. Insert the six included “AAA” batteries into the compartment, using the battery markings on the paper strip as a guide. 6. Replace the battery compartment cover and secure it by reinserting the screw and tightening it with a coin or screwdriver. 7. Carefully re-install the flip-up stand by squeezing the top of its arms together and re-inserting the pins at the top of each arm into the mounting holes. Complete Setup by carefully removing the plastic film protecting the LCD.

OPERATING INSTRUCTIONS MEASURING REAL-TIME EMF INTENSITY

To power on the EMF1394DL, press and hold the green button (Callout 2) for at least 3 seconds. The unit will sound a long beep and the LCD will illuminate. The LCD will briefly show, in the following sequence: 1) All display indications 2) The term EEP on the upper readout and 1 on the lower right readout 3) Auto on the upper readout and OFF on the lower right readout (to indicate that the meter’s Auto Power Off (APO) function is enabled) 4) The term SdHC on the upper readout and 2.0 on the lower left readout The meter will then power on with a clock icon in the lower left corner of the LCD to further confirm that the APO function is enabled. Next, the meter will automatically enter “normal” display mode. In this mode, the upper readout shows total (triaxial) EMF intensity (indicated by the text X Y Z at the upper left of the LCD) and the two lower readouts show the current day and hour and current minute and second. To set the current day and time, follow the procedure on pages 10 and 11. If you never intend to automatically log EMF measurements, you need not enter day, hour, minutes and seconds values (which together serve as a time stamp). To enter alternate display mode, press the SET button (Callout 7). In this mode, the LCD shows the x-axis field intensity on the upper readout (with an X at the upper left of the reading) and the field’s y- and z-axis intensities on the lower readouts (with a Y and a Z below the readings). 6

To make a measurement: 1. Hold the meter in your hand far from the power line, machine or appliance whose EMF intensity you wish to measure. Note that the meter’s upper readout may show a value other than zero, due to random EMF generation in the local environment. 2. Move slowly towards the target. Note how the intensity increases as you move closer, and peaks as you physically touch the target. 3. When measuring the EMF produced by a machine or appliance, power off the device and take a new reading of residual environmental EMF. Subtract the peak reading from the residual reading to determine the actual EMF intensity produced by the machine or appliance. Experiment using alternate display mode to measure the axial EMF intensities produced by a device. A label on the back of the meter indicates how to orient it to measure and display the X, Y and Z components of a three-dimensional EMF. To change the measurement unit of EMF intensity, press the G/T button (Callout 5). The button toggles between microTeslas (μT) and milliGauss (mG) units. μT or m G appears at the right of the value displayed on the upper readout. The EMF1394DL automatically enters Autoranging mode when powered on. To switch to one of the three available manual ranges, press the Range button (Callout 6). Pressing the button causes the symbol R to appear in the upper left corner of the LCD. • Pressing the Range button once enters the narrowest measurement range—0 to 20 mG (0 to 2μT). In this range, both kind of readings (the combined triaxial reading and the separate x-, y- and z-axis readings) have 0.01 mG (0.001 μT) resolution. • Pressing the button again enters a middle measurement range—0 to 200 mG (0 to 20μT). In this range, readings have 0.1 mG (0.01 μT) resolution. • Pressing the Range button a third time enters the widest measurement range—0 to 2000 mG (0 to 200μT). In this range, readings have 1 mG (0.1 μT) resolution. To exit Manual ranging mode and re-enter Autoranging mode, press and hold the Range button for at least 3 seconds. This will cause the R symbol to disappear from the upper left corner of the LCD.

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To hold a reading or readings (the combined triaxial EMF intensity reading on the upper readout or the separate axial readings on the three readouts), press the H button (Callout 3). To release the reading(s), press the H button again. To power off the EMF1394DL, press and hold the button for at least 3 seconds. DISPLAYING MAXIMUM AND MINIMUM TRIAXIAL READINGS

The EMF1394DL automatically keeps track of the maximum and minimum (largest and smallest) EMF values recorded over a measurement “session”— the time during which the meter is used to measure the EMF intensity at multiple distances from a device and/or the intensity of multiple devices. The session begins when you power on the EMF1394DL; it typically ends 15 minutes after you finish making measurements with the activation of the meter’s APO function. The value of being able to quickly determine the largest and smallest EMF generator of a group of machines or appliances, or the locations where the EMF intensity of a particular device are higher (highest) and lower (lowest), should be obvious. To display the maximum triaxial EMF value recorded by the EMF1394DL since it was last powered off, switch the meter to operate in normal display mode and press the MX/MN button (Callout 4). The term MAX will appear on the top line of the LCD. To display the minimum triaxial EMF value recorded over the same period, press the MX/MN button again. The term MIN will replace MAX on the top line. The EMF1394DL cannot display Max and Min values of single-axis measurements. To exit Max/Min mode and re-enter normal, real-time EMF measurement mode, press and hold the MX/MN button for at least 3 seconds. STORING AND RECALLING READINGS MANUALLY

The EMF1394DL incorporates enough fixed, internal memory to store up to 99 three-axis EMF readings. To store a displayed reading, briefly press (but do not hold) the MEM button (Callout 8). The upper readout will briefly flash a number from 1 to 99 indicating the number of the memory location where the currently displayed reading will be stored. When you release the button the meter will return to displaying triaxial or single-axis EMF intensity readings. 8

To recall one or more stored readings, begin by pressing the READ button (Callout 9). A small R will appear at the lower left of the LCD to indicate that the meter is now operating in memory read mode. To correlate displayed readings with their memory location number, begin by pressing the
or  button several times. With each press, the upper readout will briefly show a new memory location number, followed by the display on the three readouts of the individual x-, y- and z-axis values of EMF intensity stored at that location. To view the next-oldest reading, press the  button. The displayed memory location number will decrease by one, and the three readouts will then show the individual axial values recorded at that location. To view the next-newest reading, press the
button. Note that although you may have been viewing a combined triaxial reading when you stored it, upon recall the three readouts show the individual axial components of that reading. In other words, in memory read mode the meter defaults to operating in alternate display mode. In addition, while the meter is operating in memory read mode you can combine individual axial readings into a triaxial reading by pressing the SET button, in effect returning to normal display mode. To exit memory read mode and resume operation in the display mode last used (normal or alternate), press the ↵ button (Callout 10). Doing so will cause the small R at the left of the lower readouts to disappear. To clear the meter’s internal memory: 1) Press and hold the button for 3 seconds to power off the meter. 2) Press and hold the MEM button while pressing the button once. After a brief display of the term EEP on the upper readout and 1 on the lower right readout, the three readouts will together spell out the term rEC CLr NO. 3) Press the  button to change NO to yES on the lower right readout. 4) Press the ↵ button to execute the yES command—that is, delete the entire contents of the meter’s internal memory. AUTOMATIC DATA LOGGING

In addition to manually storing up to 99 readings, the EMF1394DL can automatically log thousands of triaxial EMF intensity readings on its preinstalled 4GB MicroSD card.

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Before beginning to data log, you should: 1) Disable the meter’s APO function so the meter will not shut itself down after 15 minutes of front-panel inactivity. To disable APO: a) Power off the meter; b) Power it back on in a special way by pressing and holding the H button while pressing and holding the button for at least 3 seconds. You should release the H and buttons precisely when SdHC 2.0 appears on the LCD. If you release the H button too soon, Auto OFF will appear before SdHC 2.0. The meter will power on, but the APO function will not be disabled. If you release the button too late, the meter will fail to power on. Unlike the display that follows a normal power on sequence detailed on page 6, if you have successfully disabled the APO function you will not see the clock icon that normally appears in the lower left corner of the LCD to indicate that the APO function is enabled. 2) Set the data logging sampling time. To set the sampling time, press and hold the SET button for at least 3 seconds. A number from 1 to 255 will appear, flashing, on the upper readout and the term INTV (for interval) will appear at the bottom right of the LCD. The number represents the data logging sampling time, in seconds. Use the
and  buttons to set the sampling time to any value from 1 to 255 seconds and then press the ↵ button to save your selection. The meter will resume operating in normal display mode. Choosing a sampling time requires making a tradeoff. Choose a small number if you want to capture many EMF values over a short period of time. The downside of using a short sampling time (such as 1 second) is that you will fill up the MicroSD card with data within a few hours. By comparison, choosing a long sampling time (such as 60 seconds) avoids filling up the MicroSD card’s capacity prematurely, but at the risk of missing key changes in EMF intensity that may occur within the samples, one-minute apart. As a compromise, consider an intermediate sampling time value on the order of 15 seconds. 3) Set the current day, hour, minute and second to serve as a time stamp for your data logs. To set the day and clock, press and hold the SET button for at least 3 seconds, as you did to set the sampling time. When the currently selected sampling time begins flashing, press the ► button. The upper readout will go blank and the number above day in the lower left readout will begin flashing. Use the
and buttons to change the value to that of the current day, and then press the ↵ button to save your 10

selection. This will cause the value above hour in the lower left readout to begin flashing. As before, use the
and  buttons to change the value to that of the current hour (in 24-hour format), and then press the ↵ button to save your selection. Repeat this procedure to set and save the hour and seconds values in the right readout. Use the  and  arrows to skip over any fields that do not need changing, or to go back and change any field that you may have missed or set incorrectly. When you are finished setting the day and clock, remember to press the ↵ button to save your selections. To begin logging data at the selected sampling time, press and hold the MEM button for at least 3 seconds. Three things will happen in the following order: 1) All three readouts will flash; 2) The term SD iNit will appear on the lower right readout to confirm that the MicroSD card is installed and ready to accept data; and 3) A small M will appear at the left of the lower left readout. While the meter is data logging, all front-panel buttons except , MEM and ↵ are disabled. To stop data logging and return to normal display mode, press the MEM or ↵ button. You have two options for reading the data logs stored on the MicroSD card: • Connect the meter to a PC by inserting the mini-USB plug at one end of the included cable into the mini-USB jack of the meter (Callout 11) and the fullsize USB plug at the other end of the cable into a USB port of the PC. • Remove the MicroSD card from the meter, plug it into an SD card adapter with a USB plug, and then plug the adapter into a USB port of a PC. Before you can remove the MicroSD card, you must gain access to it by removing the meter’s flip-up stand and batteries, as explained in the Setup Instructions on pages 5 and 6. Removing the card requires extracting it from the tiny, hinged metal bracket that holds it in place under the batteries (see upper photo at right). To begin, use your fingernail or a tweezers to slide the bracket toward the top of the meter to unlock it, and then swing the bracket up and toward the top of the meter to expose the MicroSD card (see lower photo at right).

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If you do not carefully note the positions of the MicroSD card and bracket as you move the bracket and remove the card, replacing the MicroSD card in the meter will be difficult. The photos on the previous page should help. If you do not re-install the card correctly, instead of seeing SdHC 2.0 on the LCD during the next meter startup you will see the following message: Sd Card Fail. Whether you choose to read the data logs on the MicroSD card directly or through the USB cable, the next step is to install the included Windowscompatible software on your PC. The CD containing the data logging application also contains a manual in pdf format with instructions to guide you through the installation and operation processes. It’s worth noting here that choosing the USB cable option for reading your data logs has a big benefit— in addition to making it unnecessary to remove and re-install the tiny MicroSD card. The application can exploit the duplex nature of the USB connection to such an extent that it can turn the meter into an instrument that you can remotely control using your computer’s mouse or touch pad. To clear the contents of the MicroSD card, you can bulk-erase it using your PC if you have inserted the card in an SD card reader with a USB jack. Alternatively, you can clear the contents of the card without removing it from the meter by doing the following: 1) Press and hold the button for 3 seconds to power off the meter. 2) Press and hold the MEM button while pressing the button once. After a brief display of the term EEP on the upper readout and 1 on the lower right readout, the three readouts will together spell out the term rEC CLr NO. 3) Press the ↵ button to change rEC CLr NO to Sd CLr NO. 4) Press the  button to change NO to yES on the lower right readout. 5) Press the ↵ button to execute the yES command and delete the entire contents of the MicroSD card. The meter will respond by displaying the term SD iNit, followed by the term dEL to confirm the deletion.

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SPECIFICATIONS Frequency Range Measurement Ranges Measurement Accuracies:

30 to 2000 Hz 0 to 20 mG (0 to 2μT); 0 to 200 mG (0 to 20μT); 0 to 2000 mG (0 to 200μT) In 0 to 20 mG (0 to 2μT) range: ±(3% + 30 digits) from 40 to 200 Hz; ±(3% + 30 digits) -3dB from 30 to 40 Hz and from 200 to 2000 Hz In 0 to 200 mG (0 to 20μT) and 0 to 2000 mG (0 to 200μT) ranges: ±(3% + 3 digits) at 50 and 60 Hz; ±(5% + 3 digits) from 40 to 200 Hz (except at 50 and 60 Hz); ±(5% + 3 digits) -3dB from 30 to 40 Hz and from 200 to 2000 Hz 99 three-axis EMF readings

Internal Memory Storage Capacity: Data Logging Sampling Time: 1 to 255 seconds Auto Power Off Trigger: 15 minutes of front-panel inactivity (can be disabled) Battery Life: 40 hours (typical) Optional AC Adaptor 100mA max @9VDC, center-positive Characteristics: Operating Temperature: 32° to 122°F (0° to 50°C) @