Operation - Extech Instruments SDL900 User Manual

Operation
AC/DC Magnetic Field Measurement
Switch the meter ON by pressing and holding the POWER button for at least two seconds. Press
and hold the FUNCTION button to select either DC or AC magnetic field measurement. Press and
hold the RANGE button until the desired range (1 or 2) is selected. Select the desired unit of
measure (mT or G).
For DC magnetic field measurements, the display will show either the N or S indicator. For the
North Pole, the N indicator will be shown. Similarly, for the South Pole, the S indicator will be
shown. For AC magnetic field measurements, the display will show the AC indicator. The display
will not show the N or S indicator.
Contact and press the testing material to the probe head (see Fig 1). The display will show the
magnetic field value along with the measurement unit (mT or G).
When the meter is powered ON, the display may show a non‐zero value; this is because of
Note:
environmental interference. Before taking a measurement, set the probe at the optimum
position. To Zero the display, press and hold the ▲ and ▼ buttons until the display shows the
"0" value and the display flashes the ZERO indicator. The meter is now zeroed.
Data Hold
During the measurements, press the HOLD button to freeze a displayed reading. The measured
value will be held and the LCD will display the HOLD symbol. Press the HOLD button again to
release the data hold function.
Figure 1
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