Extech Instruments MP510A User Manual page 9

9
CAUTION
Using resistance and continuity function in a live circuit will produce false results and
may damage the instrument. In many cases the suspected component must be
disconnected from the circuit to obtain an accurate reading
Ω
Ω
A
A
3 Sec
Auto leads resistance calibration
When entering the 50Ω range manually by RANGE button for high precision low
resistance measurement, this feature will prompt to short the inputs for calibration. The
display shows "Shrt". Simply short the leads for 3 seconds until the display shows zero,
then the resistance in the leads and in the internal protection circuitry of the meter is
compensated automatically. The compensation value can be as much as 5Ω. If a
compensation value that is higher than that is needed, Relative mode is recommended.
The shortcut is to short the test leads in auto-ranging resistance mode until the meter
Ω
enters the lowest 50 range automatically, press the RANGE button momentarily to
get the "Shrt" prompt, then wait 3 more seconds until the display shows zero.
Note: The calibration stays until the range is changed, the function is changed, or auto-
ranging mode is selected.