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Verifying of the Harmonic Measurement Function
IM 760401-01E
Connection
Use the same instruments as in case of AC power measurement and connect them in
the same way (refer to page 15-8).
Preparation
1.
Set the voltage range of this instrument to 15 V, and the current range to 1 A.
2.
Turn the harmonic measurement function ON.
Set the crest factor to 3.
Calibrating Currents
1.
Set the voltage signal channel of the synchronizer to 60 Hz, current signal
channel to 900 Hz (15 times) and output these frequencies.
2.
Set the frequency of the voltage standard to 60 Hz, the output voltage to 15 V
and output the voltage.
3.
Set the frequency of the current standard to 900 Hz, the output current to 1 A
and output the current.
4.
Set the displayed number on display A of this instrument to 15.
5.
Set the display function of display B to A and verify that the displayed value lies
within the specifications. On the WT230, change the settings of the element on
which harmonic measurement is to be performed (see section 7.2) and confirm
elements 1, 2, and 3 on display B.
6.
If required, change the current signal channel's setting of the synchronizer and
the frequency of the current standard, and verify another number.
7.
Turn the output of the voltage and current standard OFF.
Calibrating Voltages
1.
Set the voltage siganal channel of the synchronizer to 900 Hz (15 times), current
signal channel to 60 Hz and output these frequencies.
2.
Set the frequency of the current standard to 60 Hz, the output current to 1 A and
output the current.
3.
Set the frequency of the voltage standard to 900 Hz, the output voltage to 15 V
and output the voltage.
4.
Set the displayed number on display A of this instrument to 15.
5
Set the display function of display B to V and verify that the displayed value lies
within the specifications. On the WT230, change the settings of the element on
which harmonic measurement is to be performed (see section 7.2) and confirm
elements 1, 2, and 3 on display B.
6.
If required, change the voltage signal channel's setting of the synchronizer and
the frequency of the current standard, and verify another number.
7.
Turn the output of the voltage and current standard OFF.
15.2 Calibration
15
15-11
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