TB 9-6625-2243-24
Table 8a. Model 77 Dc Voltage
Performance Checks
Test
Test instrument indications
instrument
Calibrator
range settings
output settings
Min
Max
320 mV
300 mV
299
301
3.2 V1
3V
2.99
3.01
32 V
30 V
29.9
30.1
320 V
300 V
299
301
1000 V
900 V
896
904
1
Set function switch to V dc.
Table 8b. Model 77 Ac Voltage
Performance Checks
Calibrator output
settings
Test instrument indications
Test
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
Table 8c. Model 77 Resistance
Performance Checks
Calibrator
Test instrument range
Error
Output
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 8d. Model 77 Dc Current
Performance Checks
Test instrument
Calibrator
Test instrument indications
range settings
output settings
Min
Max
32 mA
30 mA
29.53
30.47
320 mA
300 mA
295.3
306.2
10 A1
5A
4.9
5.1
1
Connect calibrator amplifier CURRENT OUTPUT HI and LO to TI 10A and COM.
13
