Chroma 19053 - IR Voltage Calibration; Current Calibration; AC Current Calibration

Calibration Procedure
8.2.3 IR Voltage Calibration
Connect a DCV HI voltage meter to HI-POT tester.
press [UP] key
display IRV 1kV Offset ( 100V ) ; IR voltage Offset calibration
press [STOP] [START] ; read out HV meter value
; example 0. 105kV
press [UP] or [DOWN] key until display 0. 105 kV
press [ENTER] for saving calibration value.
press [STOP] ; stop IR voltage Offset calibration
press [UP] key to display
display IRV 1kV Full ( 1kV ) ; IR voltage full scale calibration
press [STOP] [START] ; read out HV meter value
; example 1.052kV
press [UP] or [DOWN] key until display 1.052 kV
press [ENTER] for saving calibration value.
press [STOP] ; stop IR voltage full scale calibration
8.3 Current Calibration
Caution! The dummy load must be between HI terminal and ammeter input terminal. Or,
dangerous may be happened.
8.3.1 AC Current Calibration
Connect a dummy load resistor 10MΩ between HI-POT testers. Connect HI terminal to AC
ammeter input HI terminal, connect LO terminal of HI-POT tester to input LO terminal of AC
ammeter.
press [UP] key
display ACA 3mA offset (0.12mA) ; ACA 2.99mA range Offset calibration
press [STOP] [START] ; read out the ammeter value
; example 0.124mA
press [UP] or [DOWN] key until display 0. 124mA
press [ENTER] for saving calibration value.
press [STOP] ; stop ACA 2.999mA range Offset
calibration
Change the dummy load resistor to 500kohm 50watt or higher.
press [UP]
display ACA 3mA Full (2.5mA) ; ACA 2.999mA range full scale
calibration
press [STOP] [START] ; read out the ammeter value
; example 2.503mA]
press [UP] or [DOWN] key until display 2.503mA
press [ENTER] for saving calibration value.
press [STOP] ; stop ACA 2.99mA range full scale
calibration
8-3
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