TB 9-6625-2243-24
Table 9c. Model 77 Series II Resistance
Performance Checks
Calibrator
Test instrument
Error
Output
range settings
display indications
settings
( )
(%)
( )
1
320
100
0.7
3200
1k
0.6
32
k
10 k
0.6
2
320
k
100 k
0.6
3.2 M
1M
0.6
32
M
10 M
2.1
1
Set calibrator 2 wire Comp ON.
2
Set calibrator 2 wire Comp OFF.
Table 9d. Model 77 Series II Dc Current
Performance Checks
Test instrument
Test instrument indications
range settings
Calibrator
output settings
Min
Max
32 mA
30 mA
29.53
30.47
320 mA
300 mA
295.3
304.7
1
10 A
5A
4.9
5.1
1
Connect calibrator amplifier CURRENT OUTPUT HI and LO to TI 10A and COM.
Table 10. Model 77 Series III 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)
1
Ac Current
Range: 0 to 10 A, 45 Hz to 1 kHz
(2.5% + 2)
Accuracy:
Range:
Accuracy:
(0.5% + 3)
320
(0.5% + 1)
3200 to 3.2 M
(2.0% + 1)
32 M
1
Ac current verified by dc current checks because both use the same shunt resistors.
15