TB 9-6625-2243-35
Table 9. Model 77 Series II Specifications
Performance specifications
Test instrument parameters
(% of reading + counts)
Dc voltage
Range:
Accuracy:
(0.3% + 1)
320 mV to 320 V
(0.4% + 1)
1000 V
Ac voltage
Range:
Accuracy:
(2.0% + 2)
3.2 V, 45 to 500 Hz
(2.0% + 2)
32 to 750 V, 45 Hz to 1 kHz
Dc Current
Range: 32 mA, 320 mA and 10 A
Accuracy: (1.5% + 2)
Ac Current
Range: 0 to 10 A, 45 Hz to 1 kHz
1
Accuracy: (2.5% + 2)
Range:
Accuracy:
320 Ω
(0.5% + 2)
3200 Ω to 3.2 MΩ
(0.5% + 1)
32 MΩ
(2.0% + 1)
Ac current verified by dc current checks because both use the same shunt resistors.
1
Table 9a. Model 77 Series II Dc Voltage
Performance Checks
Test
Test instrument indications
instrument
Calibrator
range settings
output settings
Min
Max
320 mV
300 mV
299
301
3.2 V
3V
2.99
3.01
1
32 V
30 V
29.9
30.1
320 V
300 V
299
301
1000 V
900 V
895
905
Set function switch to V dc.
1
Table 9b. Model 77 Series II Ac Voltage
Performance Checks
Calibrator output
Test
settings
Test instrument indications
instrument
Voltage
range settings
(V)
(Hz)
Min
Max
3.2 V
3
45
2.938
3.062
3.2 V
3
500
2.938
3.062
32 V
30
45
29.38
30.62
32 V
30
1000
29.38
30.62
320 V
300
1000
293.8
306.2
320 V
300
45
293.8
306.2
750 V
700
45
684
716
750 V
700
1000
684
716
14
