TB 9-6625-2146-35
Table 1. Calibration Description - Continued.
Test instrument
Manufacturer and model
Parameter
Performance specifications
TS-443/U (horizontal position)
Dc volts
Range: 0 to 150 V dc
0.25% of FS
Accuracy:
Weston, Model 155 (horizontal
Ac amps
Range: 0 to 50 A
position)
0.5% of FS, 25 to 500 Hz
Accuracy:
Weston, Model 430
Dc amps
Range: 100 A to 50 A
(horizontal position)
0.5% of FS
Accuracy:
Dc volts
Range: All ranges
0.5% of FS
Accuracy:
Weston, Model 433
Ac volts
Range: 0 to 750 V
(horizontal position)
0.75% of FS, 25 to 125 Hz
Accuracy:
1.25% of FS, 125 to 2500 Hz
Weston, Model 455
Dc volts
Range: 0 to 750 V
(horizontal position)
0.5% of FS
Accuracy:
Ac volts
Range: 0 to 750 V
0.5% of FS, 25 to 1000 Hz
Accuracy:
Weston, Model 538
Ac volts
Range: 0 to 600 V
(horizontal position)
2% of FS, 25 to 125 Hz
Accuracy:
Ac amps
Range: 0 to 50 A
2% of FS, 25 to 500 Hz
Accuracy:
Weston, Model 622 Series
Dc volts
Range: 0 to 1000 V
(horizontal position)
0.5% of FS
Accuracy:
Dc amps
Range: 0 to 500 mA
0.5% of FS
Accuracy:
Weston, Model 633 Series
Ac volts
Range: 0 to 700 V at 60 Hz
(horizontal position)
3% of FS
Accuracy:
Ac amps
Range: 0 to 1000 A at 60 Hz
3% of FS
Accuracy:
Weston, Model 749
Ac volts
Range: 0 to 600 V
(horizontal position)
3% of FS at 60 Hz
Accuracy:
5% of FS at 400 Hz
Ac amps
Range: 0 to 300 A
3% of FS at 60 Hz
Accuracy:
5% of FS at 400 Hz
Weston, Model 901
Dc volts
Range: 0 to 1000 V
(horizontal position)
0.5% of FS
Accuracy:
Dc amps
Range: 100 A to 50 A
0.5% of FS
Accuracy:
Weston, Model 904
Ac volts
Range: 0 to 750 V
(horizontal position)
0.5% of FS, 50 to 125 Hz
Accuracy:
1% of FS, 125 to 450 Hz
Ac amps
Range: 0 to 200 A, 25 to 500 Hz
0.5% of FS
Accuracy:
Weston, Model 931
Dc volts
Range: 0 to 750 V
(horizontal position)
0.5% of FS
Accuracy:
Dc amps
Range: 0 to 50 A
0.5% of FS
Accuracy:
ME-79/USM-33
Ac volts
Range: 0 to 600 V
ME-79A/USM-33
5% of FS, 50 to 1000 Hz
Accuracy:
Ac amps
Range: 0 to 600 A
5% of FS, 50 to 1000 Hz
Accuracy:
3
