Amprobe PM51A - Manual (Page 7)

5
Frequency Function
Turn the rotary switch to the Hz position to select the frequency function.
This function is set only at the highest input sensitivity mainly for measuring small electronic signals
below 20 V ac rms.
1. Connect the test probes to the signal source.
2. Read the display.
Additional Features
HOLD and 30 ms MAX HOLD Modes
HOLD mode freezes the display for later viewing. Press the HOLD button momentarily to activate or
to exit the Hold feature.
MAX mode captures voltage signals that have durations as short as 30 ms (milliseconds) within a
single range, and has automatic up range capability. This feature is available in V dc and V ac
functions. Press the HOLD button for 1 second or more to activate or exit MAX mode.
$" WARNING
Hazardous voltages present at test leads may not be displayed when in HOLD
mode.
Auto-ranging
If the function selected has more than one range, the meter will auto-range to the best range and
resolution.
Product Maintenance
Maintenance
Do not attempt to repair this meter. It contains no user serviceable parts. Repair or servicing should
only be performed by qualified personnel.
Cleaning
Periodically wipe the case with a damp cloth and mild detergent; do not use abrasives or solvents. If
the meter is not to be used for periods of longer than 60 days, remove the battery and store it
separately
Troubleshooting
If the instrument fails to operate, check battery, leads, and replace as necessary. Double check
operating procedure as described earlier in this manual. Refer to the LIMITED WARRANTY section
for obtaining warranty or repairing service.