Specifications; General; Dc Voltage; Ac Voltage - HP 974A User Manual

Specifications

Calibration period: six months minimum. Specifications apply at 23°C ± 5°C, < 80% RH
Accuracy = ± (% of reading + number of digits)
Temperature Coefficient = Accuracy 0.1/° C (0° C to 18° C; 28° C to 55° C)

General

Do not expose product to moisture or rain. Do not use product in flammable atmosphere.
Operating Temperature: 0° to 40°C / 80% RH max (no condensation).
Storage Temperature: -25°C to 60°C / 20% to 70°C RH (no condensation).
Display reading rate: Approximately 2 — 4 times/second
Display rate for frequency measurements: Approximately 1 times/second
Battery life: Approximately 120 hours on DCV

DC Voltage

Range
500 mV
5 V
50 V
500 V
1000 V
Normal Mode Rejection Ratio: (NMR) > 60 dB @ 50 or 60 Hz
Effective Common Mode Rejection Ratio (CMR) 1 kΩ imbalance: > 120 dB @ 50 or 60 Hz
AC Voltage (RMS responding, calibrated to display rms)
Range Resolution
10 µV
500 mV
100 µV
5 V
± (1% + 30)
50 V 1 mV
500 V 10 mV
± (1% + 30) 20 Hz to 1 kHz
750 V 100 V
Resolution
10 µV
100 µV
± (0.05% + 2)
1 mV
10 mV
100 mV
20 Hz to 50 Hz to
50 Hz 10 kHz
± (0.7% +30)
± (0.5% + 30)
Accuracy Input Resistance
> 1000 MΩ
11 MΩ (nominal)
10 MΩ (nominal)
Accuracy
10 kHz to 30 kHz to
30 kHz 50 kHZ
± (2% + 50)
Not Specified
± (1% + 40) ± (2% + 70)
Not Specified
Input
Impedance
50 kHz to
(nominal)
100 kHz
11 M Ω
< 50 pF
± (3% + 300)
10 M Ω
< 50 pF
1-17