YOKOGAWA WT200 User Manual page 73

6.4 Precautions Regarding Use of Integrator Function
Backup During Power Failures
Operating Restrictions during Integration
Integration Computation when the Measured Value Exceeds Measurement Limits
6-10
• If there is a power failure while integration is in progress, the integrated value and
elapsed time of integration will be backed up. When the power is restored, the display
will show the integrated results up to the time the power failure occurred.
• To start integration after the power is restored, it is necessary to reset integration first.
Certain key operations are restricted during integration, and are shown below.
(START Indicator)
(STOP Indicator)
Function
Measurement mode
Measurement synchronization source
Filter
Measurement range
Scaling
Averaging
MAX hold
Display function
Number of displayed digits
Hold
Trigger
Integration mode
Integration type
Integration timer
Integration start
Integration stop
Integration reset
Harmonic analysis function (option)
Store/recall
Comparator
Plotter and printer
Zero level compensation
• yes
: Settings can be changed
• no
: Settings cannot be changed. Attempts will result in an error code.
•
When integration is started during auto range, the measurement range will change to manual range.
When the active power, measurement current, instantaneous voltage or current exceeds
the measurement range, the integration computation will be handled as follows.
• When the active power or measurement current exceeds the measurement range by
163.84%, their integrated values become 163.84% of the measurement range.
• When the instantaneous voltage or current exceeds the measurement range by
300%, their integrated values become 300% of the measurement range.
Integration status
Integration Integration in
reset progress
Not lit Lit
Not lit Not lit
yes no
yes no
yes no
yes no
yes yes
yes no
yes yes
yes yes
yes yes
yes yes
yes yes
Settings cannot be changed, but can be
yes
displayed
Settings cannot be changed, but can be
yes
displayed
Settings cannot be changed, but can be
yes
displayed
yes no
no yes
yes no
yes no
yes no (
Store possible)
yes yes
yes yes
yes no
Integration
interrupted
Not lit
Lit
no
no
no
no
yes
no
yes
yes
yes
yes
yes
yes
no
yes
no
no (
Store possible)
yes
yes
no
IM 253421-01E