YOKOGAWA WT500 User Manual page 102

4.3 Selecting Independent Input Element Configuration
Explanation
4-6
In the wiring system settings, you can select whether to set the measurement range
or synchronization source of input elements in the same wiring unit collectively or
independently.
Turning Independent Input Element Configuration On or Off
For example, assume that the wiring system on a model with three input elements is set
as follows:
Input elements 1 to 3: Three-phase, four-wire system (3P4W). Input elements 1 to 3 are
assigned to a single wiring unit Σ.
• ON
The measurement range and synchronization source can be set independently for
each input element included in the wiring unit.
• OFF
The measurement range and synchronization source of input elements 1 to 3 are set
to the same setting. This is convenient in that the settings of the measurement range
and synchronization source of all input elements included in the wiring unit can be
made simultaneously when measuring a three-phase device.
Settings That Are Shared between Input Elements When Independent
Input Element Configuration Is Turned Off
• Measurement range (including auto range on or off)
• Synchronization source setting
Settings That Can Be Configured Independently Even When Independent
Input Element Configuration Is Turned Off
• Scaling values (VT ratio, CT ratio, and power factor)
• Input filters (line filter and frequency filter)
These settings can be configured independently for each input element regardless of
whether independent input element configuration is turned on or off.
When independent input element configuration is switched from on to off,
the measurement range and synchronization source settings of each input
element in wiring unit
• The measurement range of all input elements included in the wiring unit is set to the
highest range among all input elements. The external current sensor input range has
precedence over the direct input current range.
• The auto range settings are changed to match the setting of the input element whose
measurement range is highest. If multiple input elements are set to a common highest
measurement range, the settings of the input element with the smallest input element
number take precedence.
• The synchronization source setting is changed to match the setting of the input
element with the smallest input element number among the input elements included in
the wiring unit.
are changed as follows:
Σ
IM 760201-01E