TB 9-6625-2243-24
Table 11c. Model 77/AN Resistance
Performance Checks
Calibrator
Test instrument
Error
Output
range settings
display indications
settings
( )
(%)
( )
1
320
100
2.2
3200
1k
2.1
32
k
10 k
2.1
2
320
k
100 k
2.1
3.2 M
1M
2.1
32
M
10 M
3.1
1
Set calibrator 2 wire Comp ON.
2
Set calibrator 2 wire Comp OFF.
Table 11d. Model 77/AN Dc Current
Performance Checks
Test instrument
Calibrator
Test instrument indications
range settings
output settings
Min
Max
32 mA
30 mA
29.08
30.92
320 mA
300 mA
290.8
309.2
1
10 A
5A
4.83
5.17
1
Connect calibrator amplifier CURRENT OUTPUT HI and LO to TI 10A and COM.
Table 12. Model 77/BN Specifications
Performance specifications
Test instrument parameters
(% of reading + counts)
Dc voltage
Range: 0 1000 V
Accuracy: (0.5% + 1)
Ac voltage
Range:
Accuracy:
320 mV to 320 V, 45 Hz to 1 kHz (2.0% + 5)
(2.0% + 5)
750 V, 45 Hz to 500 Hz
Dc Current
Range: 0 to 10 A
Accuracy: (2.0% + 3)
1
Ac Current
Range: 0 to 10 A, 45 Hz to 1 kHz
Accuracy: (3.0% + 2)
Range:
Accuracy:
(2.0% + 1)
320
(2.0% + 1)
3200 to 3.2 M
(3.0% + 1)
32 M
1
Ac current verified by dc current checks because both use the same shunt resistors.
Table 12a. Model 77/BN Dc Voltage
Performance Checks
Test
Calibrator
Test instrument indications
instrument
output settings
range settings
Min
Max
320 mV
300 mV
298.4
301.6
3.2 V1
3V
2.984
3.016
32 V
30 V
29.84
30.16
320 V
300 V
298.4
301.6
1000 V
900 V
894
906
1
Set function switch to V dc.
18