EXTECH EX380942 [4/6] Advanced features

380942-EU-EN v2.2 07/13

Advanced Features

Relative Measurements

1) Press the ZERO key. The displayed reading will zero and the word ZERO will appear on the

upper portion of the LCD.

2) All subsequent measurements will now be displayed with respect to the zeroed reading. For

example, if a 20A reading is zeroed and a 30A reading is subsequently measured, the LCD will

display 10A.

3) To return to normal operation, press and hold the ZERO key for 2 seconds until the word ZERO

switches off.

4) Note that Relative mode is not available if MIN/MAX mode is enabled.

Data Hold

To freeze the current reading on the LCD, press the Data Hold key. The word HOLD will appear on

the LCD while the meter is in the Data Hold mode. To release the Data Hold function and return the

meter to normal operation, press the Data Hold key again. The word HOLD will switch off.

MIN/MAX Readings

Pressing the MIN/MAX key allows the meter to display the highest and then the lowest readings

encountered. Press the MIN/MAX key once to view the minimum reading, press it again to view the

maximum reading. Note that the meter will only change its displayed reading when a measurement

is taken higher than the previous MAX or lower than the previous MIN readings. The HOLD display

icon (along with the MIN or MAX icon) will appear on the LCD in MIN/MAX mode. Pressing the

MIN/MAX key a 3

time returns the meter to normal operation.

Auto Power Off

To extend battery life, the meter will auto power off after 30 minutes of operation. To resume

operation, either turn the meter OFF and then ON again, or press the HOLD button. To disable the

auto power off function, press down the “HOLD” key while turning the meter on.