118
PLZ-4WH
Calibration
The PLZ-4WH is calibrated properly when it is shipped, but we recommend that you calibrate
it regularly to keep it operating at top performance.
What gets calibrated?
The current and voltage values are calibrated.
The current values are calibrated for each of the three current ranges (L, M, and H).
The voltage values are calibrated for each of the two voltage ranges (65 V and 650 V).
The offset and gain values for all the ranges indicated above are calibrated.
Offset value: 10 % of the full scale value
Gain value: 100 % of the full scale value
During operation, the relationship between the current setting and the actual current and the
relationship between the voltage setting and the actual voltage are linear. Therefore, a
straight line is defined by the calibrated offset and gain values. During operation, the
relationships between the current and voltage settings and the actual current and voltage
values are determined by the calibrated straight line.
Calibrated items
The following eight items are calibrated for the three voltage ranges and the two current
ranges.
1. The offset value of the internal reference voltage for current settings.
2. The gain value of the internal reference voltage for current settings.
3. The offset value of the internal reference voltage for voltage settings.
4. The gain value of the internal reference voltage for voltage settings.
5. The offset value for measured values.
6. The gain value for measured values.
7. The offset value of the internal reference voltage for the protection function settings.
8. The gain value of the internal reference voltage for the protection function settings.
The offset values of the internal reference voltages for the settings and of the measured
values are calibrated simultaneously. The same is true for the gain values.
When you press ENTER or NEXT (SHIFT+ ) in the gain calibration screen, the calibration
data is written to the internal memory.
Reference
F.S.
1/10F.S.
Ofst
Gain
0
calibration
calibration
Offset
Gain
Range’s
Range’s
