Current Measurement Calibration - Chroma 61601 User Manual

4.2.2 Current Measurement Calibration

Users can enter CALIBRATION CHOICE page after pressing password, see 4.2. Then,
press , , to do the current measurement calibration.
2 ENTER
CALIBRATION CHOICE = 2
1. V OUT AND MEAS.
3. EXT Vref.
1. CURRENT MEAS. ACCURACY CALI
A. WAIT TWO SECONDS THEN ( ENTER )
In above step A of CURRENT MEAS. ACCURACY CALI., the display shows the offset of Iac
and Idc measured by AC source. They are produced by internal components. Wait two
seconds then press
Then press , then
SHIFT
1. CURRENT MEAS. ACCURACY CALI
B. ( ENTER ) THEN CHECK CURRENT IS 1.6A
C. ( ENTER ) THEN KEYIN CURRENT MEAS. 16A
0.00
In above step B of CURRENT MEAS. ACCURACY CALI., press
output 12.5VAC. The user should apply suitable load to output, to make the output current
measured by current meter ( or power analyzer ) be about 1.6A ( for 61604 ). The different
model shows different current value in display. If the output current is ok after applying load,
press , then AC source will output 125VAC. The output current will be 10 times of
ENTER
step B, 16A. Key in the exact value of current measured by current meter. The output
current of step B. and step C. are shown as below:
61601 (500 VA)
61602 (1000 VA)
61603 (1500 VA)
61604 (2000 VA)
Step C is the final step of CURRENT MEAS. ACCURACY CALI. Press
that page. Then display will show as below. Press
Iac = 0.00 A
, then Iac = 0.00A, Idc = 0.00A.
ENTER

to change to next step.
A
Model
2. I MEAS.
Idc = 0.00 A
Step B. Step C.
0.4 A
0.8 A
1.2 A
1.6 A
to save the calibration result.
ENTER
Calibration
150V RNG

150V RNG

then AC source will
ENTER
4 A
8 A
12 A
16 A
to exit
PAGE/EXIT
4-5