Specifications - YOKOGAWA WT200 User Manual

15.2 Calibration
15-6
Calibration
Regarding the combination of voltage and current ranges, we recommend applying the
following.
• Test the current ranges with the voltage range set to 150 V;
• Test the voltage ranges with the current range set to 5 A.
Of course testing can be carried out using other combinations as well.
1. Set the voltage or current range of this instrument to the testing range.
2. Set the output voltage of the DC voltage standard to the rated range value of
this instrument, and output the voltage.
3. Set the output current of the DC current standard to the rated range value of this
instrument, and output the current.
4. Fine adjust the output setting value of the voltage standard so that the voltage or
current value displayed on this instrument shows the rated range.
5. Read the output voltage or current setting value of the voltage standard and
treat this as the reference.
6. Verify that the power factor value displayed on this instrument shows the rated
value. The product of the voltage setting value and the current setting value of
the voltage standard is the calibrated power factor value.
Note
Before carrying out the calibration described above, verify that this instrument performs within
its accuracy specifications.
• Set the output of the DC voltage standard to the rated range of this instrument, read this
voltage or current value on the display on this instrument and verify that this value lies
within this instrument's accuracy.
• Set the output of the DC voltage standard to the rated range of this instrument, read the
power factor value on the display on this instrument and verify that this value lies within
this instrument's accuracy.
IM 253421-01E