8-8 Maintenance and Calibration PLZ-4W
CC mode calibration (calibration number 1, 2, and 3)
Carry out calibration on the low range items first according to steps A to D. Then,
carry out calibrations for Mid range and High range.
Table 8-2 Overview of the procedure
■ Low range calibration
Step A: Calibration of the offsets of internal reference voltage for out-
put setting and measured value
1.
Connect a shunt resistor that matches the value corresponding to 10 %
of the low range full scale.
2.
Press the or CURSOR key to select the calibration number “1. CC
(Low)”.
3.
Connect a CV power supply to the load input terminal and apply 5 V.
Set the current of the power supply approximately in the range of 2 % to
5 % of the rated current of the load device.
4.
Press the ENTER key.
The load automatically turns on, and the offset calibration (CC (Low) Offset
Adjustment) screen appears.
Procedure
Current
range
Percentage with
respect to the full
scale (%)
Calibration item
Internal reference
voltage for output set-
ting
Measured value
Internal reference
voltage for protection
function setting
Offset Gain Offset Gain Offset Gain
A
Low
10
––––
B –––– –
C
100
––––
D –––––
A
Mid
10
––––
B –––– –
C
100
––––
D –––––
A
High
10
––––
B –––– –
C
100
––––
D –––––
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