Page 78 of 85 Service & Calibration
Table 4-1: Calibration Equipment
Equipment Requirements Equipment Requirements
AC/DC High Voltage Voltmeter Measure: 0 to 6kV, 0.1% accuracy
250kΩ Res. Std
1200V, 5mA, 5W; 1250V 7mA
AC/DC Current Meter Measure: 0 to 40mA, 0.1% accuracy
100kΩ Res. Std
400V, 4mA, 50W; 1200V 12mA
1GΩ Resistance Standard
250V
80kΩ Res. Std
1200V, 15mA, 100W
100MΩ Resistance Standard
500V
1Ω Resistor
0.1A
10MΩ Resistance Standard
1200V, 0.12mA, 0.25W; 500V; 1kV
3Ω Resistor
0.1A
500kΩ Resistance Standard
1200V, 2.4mA, 0.25W
4.3.1 Calibration Parameters
Table 4-2 contains the calibration parameters for the Sentry Plus Series instruments. All tests
points are not required for each of the instruments (10 Plus, 20 Plus & 30 Plus).
Table 4-2: Calibration Parameters
PRODUCT TEST RANGE CAL. POINT
Voltage Calibration
10/20/30 CAL ACV 5kV OFST 0.050kV
10/20/30 CAL ACV 5kV FULL 4.000kV
20/30 CAL DCV 6kV OFST 0.050kV
20/30 CAL DCV 6kV FULL 4.000kV
30 CAL IR 1kV OFST 0.050kV
30 CAL IR 1kV FULL 1.000kV
Current Calibration
10/20/30 CAL ACA 3mA OFST
0.12mA / 10MΩ
10/20/30 CAL ACA 3mA FULL
2.4mA / 500kΩ
10/20/30 CAL ACA 15mA OFST
2.4mA / 500kΩ
10/20/30 CAL ACA 15mA FULL
12mA / 100kΩ
20/30 CAL DCA 3mA OFST
0.12mA / 10MΩ
20/30 CAL DCA 3mA FULL
2.4mA / 500kΩ
20/30 CAL DCA 5mA OFST
2.4mA / 500kΩ
20/30 CAL DCA 5mA FULL
4.8mA / 250kΩ
WAC & WDC Arcing Calibration
10/20/30 CAL AC ARC 15mA Arc 7.00mA
20/30 CAL DC ARC 5mA Arc 5.00mA
IR Resistance Calibration
30 CAL IRR Range1
1000MΩ
Range 1
1000M = 1.00GΩ
30 CAL IRR Range2
100MΩ
Range 2
100.0MΩ
30 CAL IRR Range3
10MΩ
Range 3
10.0MΩ
30 CAL IRR Range4
10MΩ
Range 4
10.0MΩ
Ground Continuity Calibration
10/20/30 CAL GC
1Ω
OFST
1Ω
10/20/30 CAL GC
3Ω
FULL
3Ω
Contrast Calibration
10/20/30 CAL CONTRAST 11 11 13