EMDEX II Meter
EMDEX II is a powerful magnetic field measurement system based on EPRI's original power frequency magnetic field exposure meter. The EMDEX II can be used for exposure assessment, research projects, and general measurements. Its flexibility and ease of use make it suitable for both simple and complex measurement protocols. The EMDEX II's on-board computer records field levels based upon user-defined parameters and interfaces with a PC for easy analysis and output. The battery operated unit is small (6.6" x 2.6" x 1.5" [16.8 cm x 6.6 cm x 3.8 cm]), light-weight (12 oz [341 g]), and records magnetic fields in the range of 0.1 mG to 3.0 Gauss, with a minimum resolution of 0.1 mG and typical measurement accuracy of +2%. Up to twenty distinct data sets can be collected prior to downloading the data. The unit price includes documentation and EMCALC2007 software for transfer, storage, and analysis of data files on a personal computer. Accessories are also available for the EMDEX II, including LINDA (LINear Data Acquisition wheel which permits accurate mapping of fields in a particular area with contours and 3-D maps), AMP-LOGGER (a clamp-on type ammeter which plugs into the auxiliary jack to record current), and E-PROBE (a parallel-plate electric field sensor).
Also available in a high field version: 4 mG to 120 Gauss (4 mG resolution).
EMDEX II AMP-LOGGER Measurement System
The EMDEX II Amp-Logger is a very useful addition to the family of EMDEX II products. The Amp-Logger, complete with its clamp-on current probe, plugs into the EPRI EMDEX II magnetic field meter's auxiliary port to monitor or continuously record current flow on various types of low voltage conductors (water pipes, secondary circuits, service drops, industrial or commercial building and house wiring, neutrals, ground rods, etc.). Rated at 200 amps (with a 0.1 amp resolution), the Amp-Logger provides an ideal addition to the EMDEX II measurement system. EMCALC2007 software, included with the EMDEX II meter, produces statistical analysis of current variations, plots current versus time graphs, and will show simultaneous magnetic field readings taken with the EMDEX II meter. The unit is small (1.6" x 2.2" x 2.2" [4.0 cm x 5.5 cm x 5.5 cm]) and light-weight (2.2 oz [63 g]).
EMDEX II E-Probe Measurement System
The E-Probe is an accessory to the EMDEX II meter which enables the EMDEX II to make electric field measurements. The E-Probe consists of two aluminum plates, calibrated to produce an induced current which the EMDEX II meter can read and convert to determine an equivalent electric field measurement value. This process allows the EMDEX II to be used as a recording electric field meter. Electric field data collected with the E-Probe can be displayed in EMCALC as field versus distance graphs, contour maps, or three-dimensional field plots. The fiberglass pole which accompanies the E-Probe is designed to isolate the user from the sensor (so the user does not act as a ground path for the sensor). The E-PROBE has a range of 0.010 to 13 kV/m (10 to 13,000 Volts per meter), with an accuracy of about +/- 5 % and resolution of about 1 V/m (this conforms to the IEEE Standard).
LINDA Measurement Wheel
The Linear Data Acquisition (LINDA) System is an accessory for the EMDEX II magnetic field measurement system. LINDA uses a customized measurement wheel and an EMDEX II meter to measure the magnetic field along a specified path. The LINDA measurement wheel is 38 inches high [95 cm], 9 inches wide [22.5 cm], and weighs only 6.5 pounds [3 kg] (with an EMDEX II meter). A magnetic switch mounted on LINDA's wheel sends a signal to the REMOTE jack on the EMDEX II every 1 foot of travel. The user may walk slowly with the LINDA wheel to produce detailed measurements over a short distance or may walk quickly (or run) to produce more generalized measurements over longer paths. There are no limitations on how quickly the LINDA wheel may travel other than the mechanical restrictions of the wheel itself. Angular changes in direction are easily measured and entered into the EMDEX II using the built-in magnetic compass. Special functions included in the EMCALC2007 software allows statistical analysis, field versus distance graphs, enhanced contour, and 3-D plotting capabilities.
EMDEX LITE Meter
EMDEX LITE is a smaller, lighter version of the EMDEX II, the powerful magnetic field measurement system. It is optimized for personal magnetic field exposure monitoring. Although it has no survey mode, menuing or mapping functions, it's on-board computer records field levels based upon user-defined parameters and interfaces with a PC for easy analysis and output. The battery operated unit is small (4.7" x 2.4" x 1.0" [12 cm x 6 cm x 2.5 cm]), light-weight (6 oz [170 g]), and records magnetic fields in the range of 0.1 mG to 700 mG, with a minimum resolution of 0.1 mG and typical measurement accuracy of +4%. Although the EMDEX LITE can only collect one data set at a time, this low-power unit can operate continuously for over 10 months on a single 9-volt battery. The unit price includes documentation and EMCALC2007 software for transfer, storage, and analysis of data files on a personal computer.
Also available in a high field version: 5 mG to 70 Gauss (5 mG resolution).
EMDEX SNAP Meter
The EMDEX SNAP is another addition to the popular family of EMDEX magnetic field meters. The EMDEX SNAP is an easy to use three-axis digital survey meter. Controlled by a MotorolaTM microprocessor, the SNAP displays resultant magnetic field levels every 0.5 seconds. Operation is initiated by one simple power switch. The battery operated SNAP is small (1.5" x 2.8" x 4.6" [3.8 cm x 7.1 cm x 11.7 cm]), light-weight (6 oz [170 g]), and measures magnetic fields in the range of 0.1 mG to 1,000 mG, with a minimum resolution of 0.1 mG and accuracy at full scale of +1% (typical accuracy is about +3%). The SNAP is a low-power unit that can operate continuously for over 50 hours on a single 9-volt battery.
Also available in a high field version: 5 mG to 50 Gauss (5 mG resolution).
EMDEX MATE Meter
The EMDEX MATE represents a breakthrough in price and performance. The EMDEX MATE is a cumulative exposure meter which provides reliable three-axis results that are displayed at the end of the measurement session. Time-Weighted-Average, Minimum, Maximum, Standard Deviation, Percent of Time in Six Different Exposure Ranges, and Cumulative Exposure Time are the principle quantities displayed (other quantities are available with custom internal software). This instrument extends the capability of all investigators to perform exposure assessment studies for workers (during entire work periods or for individual tasks), home owners, children, and for all others where magnetic field exposure is to be evaluated.
The EMDEX MATE is simple to operate. Once the power switch has been turned on, data collection is initiated by setting a second switch to RUN. The MATE then displays resultant magnetic field levels every 0.5 seconds as it accumulates exposure data (individual measurement values are not recorded). To end data collection and view exposure results, set the second switch to DISPLAY RESULTS. The MATE continuously scrolls the statistical exposure measurement results until power is turned off.
The battery operated MATE is small (1.5" x 2.8" x 4.6" [3.8 cm x 7.1 cm x 11.7 cm]), light-weight (6 oz [170 g]), and measures magnetic fields in the range of 0.1 mG to 1,000 mG, with a minimum resolution of 0.1 mG and accuracy at full scale of +1% (typical accuracy is about +3%). The MATE is a low-power unit that can operate continuously for over 50 hours on a single 9-volt battery.
Also available in a high field version: 5 mG to 50 Gauss (5 mG resolution).
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