3.2 Configuring Settings
50
If the SYNC lamp (ERROR) lights up, change the zero-cross filter setting.
When the synchronization source is set to voltage (U) or current (I), the SYNC lamp (ERROR) will light up if
the synchronization signal cannot be acquired. When the SYNC lamp (ERROR) is lit up, the instrument will
not be able to perform accurate measurement.
The instrument incorporates 100 Hz, 500 Hz, 5 kHz, and 100 kHz low-pass filters for use in switching the cut-
off frequency (i.e., as a zero-cross filter). These filters also vary with the frequency measurement range.
Additionally, accurate measurement also cannot be performed when using input of a low frequency of less
than 10 Hz (with a repeating period of greater than 0.1 sec.) because each input cycle will exceed the instru-
ment’s calculation processing interval (causing a timeout). The SYNC lamp (ERROR) will also light up at this
time. In this case, set the instrument’s timeout setting to 1 sec. (for an input frequency of less than 10 Hz) or
10 sec. (for an input frequency of less than 1 Hz). (p.54)
3.2.5 Setting the Frequency Measurement Range
(Zero-cross filter)
The zero-cross filter is linked to the frequency measurement
range. If you are unable to perform frequency measurement,
change this zero-cross filter setting. The default setting is 500
Hz. Setting it to 100 Hz, 5 kHz, or 200 kHz will cause the FREQ
lamp to light up.
Accurate measurement cannot be performed if the SYNC lamp
(ERROR) is lit up.
Setting the timeout to 1 sec. to 10 sec. will cause the TIME OUT
lamp to light up. The default value is 0.1 sec.
Setting Description FREQ lamp
100 Hz
Use this setting primarily when measuring standard AC power
supply equipment (50 Hz, 60 Hz) and when using the fundamen-
tal wave (100 Hz or less) on the secondary side of an inverter as
the synchronization signal.
on
500 Hz (Default setting)
Use this setting primarily when measuring standard AC power
supply equipment (50 Hz, 60 Hz, 400 Hz) and when using the fun-
damental wave on the secondary side of an inverter as the syn-
chronization signal.
off
5 kHz
Use this setting when using frequency input in excess of 500 Hz
as the synchronization signal.
on
100 kHz
Use this setting when using frequency input in excess of 5 kHz as
the synchronization signal.
on
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