Auto-Off Feature; Troubleshooting - AEMC 721 User Manual

5.10 Auto-Off Feature

The Model 721 will automatically shut itself off after 10 minutes during the
following conditions:
• No push button action
• No rotary switch (A ,V) action
• No measurement change
• Not in Record Min/Max mode
A short beep will be heard prior to shutdown. Any control action will re-
power the instrument.
The Auto-Off feature may be disabled by holding down the RANGE push
button, while turning the rotary selection switch from OFF to either Amps
or Volts.
will be displayed in the upper left-hand corner of the LCD when the
Auto-Off feature has been disabled.
The Auto-Off feature will be reset when the Model 721 is turned off.

5.11 Troubleshooting

From time to time, a minor malfunction may occur due to normal operating
events. Below are common events and solutions which should help you
troubleshoot your Model 721.
Symptom
Instrument will not turn on
Missing or inaccurate readings
No function control action;
High frequency beep(s)
40
Recommended Action
Low battery; replacement required
Check that minimum input level is
present;
Check that the transformer mating
surfaces are clean
Exit current mode with push button;
Instrument may be beyond safety or
operating range
Harmonic Meter Model 721