YOKOGAWA WT310EH User Manual

5-12
IM WT310E-01EN
Data Correction When the Auto Range Feature Switches the
Range
Measurement does not take place while the range is being switched by the auto range feature. After
the measurement range is determined, the first measured data for the period of time over which
measurement did not take place is added to the integrated value.
• WhentheRangeIsIncreased
Each time the range is increased, up to three of the first items of data measured after the
determination of the measurement range is added to the integrated value immediately before the
conditions for increasing the range were met.
• WhentheRangeIsDecreased
Each time the range is decreased, up to two of the first items of data measured after the
determination of the measurement range is added to the integrated value immediately before the
conditions for reducing the range were met.
Checking Whether the Range Has Been Changed by the Auto
Range Feature
During integration, when the measurement range is changed by the auto range feature, a hyphen is
added to the measurement range information that is output through communication.
Computation of the Integrated Value When the Measured Value
Exceeds the Measurement Limit (for Fixed Ranges)
Whenthesampledinstantaneousvoltageorcurrentvalueexceedsapproximately333%(approximately
666%whenthecrestfactorissetto6or6A)ofthemeasurementrange,thevalueisprocessedas
ifitwereapproximately333%(approximately666%whenthecrestfactorissetto6or6A)ofthe
measurement range.
Integration When the Applied Current Is Small
WhenthemeasurementmodeisRMSorVOLTAGEMEANandtheappliedcurrentislessthanor
equalto0.5%(1%whenthecrestfactorissetto6or6A)oftheratedrange,integrationtakesplaceas
if the current value were zero.
Valid Frequency Ranges for Integration
The sample rate is approximately 100 kHz. The voltage and current signal frequencies that are valid
for integration are indicated below.
Integrated Item ValidFrequencyRangeforIntegration
Active power DCto45kHz
Current WhenthemeasurementmodeisRMS DC or the lower frequency limit determined by the data update
intervaltoapproximately45kHz
When the measurement mode is
VOLTAGEMEAN
DC or the lower frequency limit determined by the data update
intervaltoapproximately45kHz
When the measurement mode is DC DCto45kHz
5.4 Notes about Using Integration

YOKOGAWA WT310EH Specifications

General

Brand	YOKOGAWA
Model	WT310EH
Category	Measuring Instruments
Language	English