YOKOGAWA CW140, User Manual, Page: 68 / 292

IM CW140-E
7-16
7.5 Frequency Measurement and Low-
pass Filters
This section describes frequency measurement and settings for a low-pass
filter.
●
Frequency Measurement Range
Normal measurement: 45 Hz to 1 kHz
Harmonics mode: 45 Hz to 65 Hz (fundamental wave frequency)
Three-phase unbalance rate: 45 Hz to 440 Hz
●
Frequency Source Setting
Frequency source can be selected from voltage inputs V1 to V3 and current
inputs CH1 to CH4. The default setting is V1.
The frequency source setting depends on the wiring setting.
Key operation
The frequency source can be set on page 1/2 of the system setting screen
or the last page of setup screen in each measurement mode by pressing
the key.
<Example: Instant mode>
(SETUP): Press this key on the Instant mode.
(NEXT): Press this key to select page 2/3 of setup screen.
(NEXT): Press this key again to select page 3/3 of setup screen.
Using the Cursor key, select the frequency source item.
(It becomes highlighted.)
(CHANGE): Press this key to display selectable items (for wiring) in
the center of the screen.
FREQUENCY SOURDE SETTING
V1 V2 V3 I1 I2 I3
Using the Cursor key, select the desired item.
Confirms the selection.
Confirms the settings.
Return to the measurement screen.