YOKOGAWA WT110 User Manual page 69

7.4 Precautions Regarding Use of Integrator Function
Backup During Power Failures
Operating Restrictions during Integration
Integration Computation when the Measured Value Exceeds Measurement
Limits
7-8
• If there is a power failure while integration is in progress, the integrated value and integration
elapsed time 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
Wiring method (only WT130)
Measurement mode
Filter
Measurement range
Scaling
Averaging
Display function
Input element (only WT130)
Hold
Trigger
Integration mode
Integration timer
Integration start
Integration stop
Integration reset
Harmonic analysis function (option)
Store/recall
Ο
⋅ :Settings can be changed
×
⋅ :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
Ο Ο
×
Ο
×
Ο
×
Ο
Ο Ο
×
Ο
Ο Ο
Ο Ο
Ο Ο
Ο Ο
Ο
Settings cannot be changed, but can be
displayed
Ο
Settings cannot be changed, but can be
displayed
×
Ο
×
Ο
×
Ο
×
Ο
×
Ο
Store possible
Integration
interrupted
Not lit
Lit
Ο
×
×
×
Ο
×
Ο
Ο
Ο
Ο
Ο
×
Ο
×
×
Store possible
IM 253401-01E