Data Recording; Comparator Utility - Extech Instruments MG320 User Manual

6.7.5 Comparator Utility

Read and understand all operations and safety information contained in the Insulation Resistance
and Continuity measurement sections and the Safety section before continuing.
In Comparator mode the meter compares measurement to a preset reference values and
displays PASS (measured value greater than reference value) or NG (measured value lower than
reference value).
1. Connect the meter to the device under test as shown in the test section above.
2. Press the COMP button momentarily and the COMP icon will appear on the lower left, next to
the comparison resistance value. Use the COMP button to step to the desired reference value.
3. Press the TEST button to start the test. If the measurement is greater than the reference,
then the test passes and PASS will be displayed; if the measured value is lower than the
reference then the test fails and NG is displayed.
4. The Resistance comparator preset options are: 100k, 200k, 300k, 400k, 500k, 1M, 2M, 3M,
4M, 5M, 10M, 20M, 30M, 40M, and 50M.
5. The Continuity comparator preset options are: 1, 2, 5, 10, and 20Ω.
7. Data Recording
The MG320 can store, recall, and clear up to 99 readings (01-99).
1. Press the
2. The displayed counter increments to the next available memory location.
3. To recall a reading, press the
buttons to scroll through the stored readings. The stored reading counter keeps track of the
memory location (01-99). Press
4. Press and hold the
button to save a displayed reading.
button (RECALL will be displayed). Use the arrow
button for 2 seconds to erase all memory data.
again to return to the normal mode.
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