Ac Current Calibration - QuadTech Guardian 5000 Instruction Manual

4.3.5 AC Current Calibration

Connect a load resistor (10 Mohms) between the Hipot H.V. OUTPUT of the Guardian 5000
and the High terminal of the AC ammeter. Connect the Low terminal of the AC ammeter to
the LOW DRIVER terminal (black) of the Guardian 5000.
Press
Display
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[UP] or [DOWN] key as necessary to display
CL OFST 2.99
[OFF] key to display
1 1.2KV 2.999mA
[STOP] [START]
[0] [.] [1] [2] [4] [ENTER]
[STOP]
[DOWN] key to display
CL FULL 2.99
[OFF] key to display
1 1.2KV 2.999mA
[STOP] [START]
[2] [.] [9] [0] [3] [ENTER]
[STOP]
[DOWN] key to display
CL OFST 30.0
[OFF] key to display
1 1.2KV 30.0mA
[STOP] [START]
[2] [.] [9] [0] [3] [ENTER]
[STOP]
[DOWN] key to display
CL FULL 30.0
[OFF] key to display
1 1.2KV 30.0mA
[STOP] [START]
[2] [4] [.] [5] [0] [ENTER]
[STOP]
ACA
0.0 sec
; read out the ammeter value
; example 0.124mA
; stop ACA 2.99mA range offset
calibration and change the dummy load
resistor to 420 kohms
ACA
0.0 sec
; read out the ammeter value*
; example 2.903A
; stop ACA 2.99mA range full scale
calibration
ACA
0.0 sec
; read out the ammeter value
; example 2.903mA
; stop ACA 30.0mA range offset
calibration and change the dummy load
resistor to 50 kohms
ACA
0.0 sec
; read out the ammeter value*
; example 24.50mA
; stop ACA 30mA range full scale
calibration
* it may be necessary to
add resistance in series
with the load to maintain
current below the limit
Maintenance & Calibration 4-5