Display; Audio - HP 974A User Manual

Display

Low Battery indicator
Replace batteries when on.
Main Display
(Not all annunciators shown)
Number of digits is set by range and function
Displays O.L to indicate an overload condition
Entire display flashes if input overvoltage

Audio

Power on
First beep at power on.
Second beep when beginning to make measurements.
Single beep
Indicates any valid function key press.
Indicates a new High or Low value recorded when in Min/Max function.
Steady repeating beep
Indicates when measurement is steady when using Auto-Hold function.
Rapid repeating beeps
Indicates wrong input terminals used for function selected.
Indicates an overload condition at the measurement terminals.
Continuous tone
Indicates a resistance of < 100 Ω when using the Continuity function.
Auto Power Off
Pairs of beeps for 30 seconds.
Long beep just before power off.
Cancel by changing function switch position or pressing any key.
Operation
Secondary Display
Shows:
Range (most functions)
except for
Elapsed time (Min/Max)
1-13