Hioki PW3336-01, Инструкция по эксплуатации

Страница: 59 / 206

3.2 Configuring Settings
53
When the synchronization source is set to voltage (U) or current (I), the SYNC. ERROR lamp will light up if the
synchronization signal cannot be acquired. When the SYNC. ERROR lamp is lit up, the instrument will not be
able to perform accurate measurement.
The instrument incorporates 100 Hz, 500 Hz, 5 kHz, and 200 kHz low-pass filters for use in switching the cut-
off frequency (i.e., as a zero-crossing filter). These filters also vary with the frequency measurement range. If
the
SYNC. ERROR lamp lights up, change this zero-cross filter setting.
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. ERROR lamp 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).
* Setting the frequency measurement range to 100 Hz or 5 kHz requires that the firmware with the version
number 1.10 or later be installed.
See "2.4 Turning On the Instrument" (p.35) on how to check the installed firmware version number.
Example: 1P2W×3
3.2.6 Setting the Frequency Measurement Range
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 value is 500
Hz. Setting it to 100 Hz, 5 kHz, or 200 kHz will cause the lamp
to light up.
Accurate measurement cannot be performed if the SYNC. ER-
ROR lamp is lit up.
Setting the timeout to 1 sec. to 10 sec. will cause the lamp to
light up. The default value is 0.1 sec.
Zero-cross filter setting
Description
100 Hz *
Use this setting primarily when measuring standard AC power supply equipment (50 Hz, 60
Hz) and when using the fundamental wave (100 Hz or less) on the secondary side of an in-
verter as the synchronization signal.
FREQ. 200kHz
lamp on
500 Hz
Use this setting primarily when measuring standard AC power supply equipment (50 Hz, 60
Hz, 400 Hz) and when using the fundamental wave on the secondary side of an inverter as
the synchronization signal. (Default setting)
FREQ. 200kHz
lamp off
5 kHz *
Use this setting when using frequency input in excess of 500 Hz as the synchronization signal.
FREQ. 200kHz
lamp on
200 kHz
Use this setting when using frequency input in excess of 5 kHz as the synchronization signal.
FREQ. 200kHz
lamp on
1
Press
.