Amprobe AM-540 User Manual page 13

AM-550 / AM-550-EUR Function Buttons
Button Measurement Function
Press the yellow SELECT button to select alternate
SELECT
measurement functions on the rotary switch.
Manual or Auto range switching for voltage current,
resistance and capacitance. The default setting is Auto
ranging, press to switch to manual ranging. Press for 2 sec
RANGE /
to return to auto ranging.
AUTO T1-T2
T1 or T2 or T1-T2 function switching for temperature
measurement.
Relative mode / Press >2 sec to turn ON or turn OFF
REL /
flash light.
Press to enter Maximum / minimum reading memory
mode. Press again for Maximum reading; press again
for minimum reading. Press > 2 sec to exit maximum/
minimum reading mode.
MAX/MIN /
PEAK(1ms)
Press > 2sec to enter Peak MAX/ Peak MIN mode. Press
again for Peak Maximum reading; press again for Peak
minimum reading. Press > 2 sec to exit Peak MAX/ Peak
MIN reading mode.
Display freezes present reading / press > 2 sec to turn ON or
HOLD /
turn OFF LCD backlight.
For voltage measurement functions only. Press and hold
the button to change the input impedance of V and COM
Low imp. 400kΩ terminal to 400kΩ. Release 400kΩ button to return to
normal input impedance of V and COM terminal (around
10MΩ).
7