YOKOGAWA WT310E User Manual

2-12
IM WT310E-01EN
Scaling Constant
The procedure for setting scaling constants varies depending on the setting method that you have
selected. You can set a scaling constant to a value between 0.001 and 9999. The default setting is
10.00. On the WT310E and WT310EH, the scaling constant is set in display C.
• WhentheSettingMethodHasBeenSettoALL
In display D, you can set the scaling constant for all the elements.
• WhentheSettingMethodHasBeenSettoEACH
• IndisplayB,youcansetthescalingconstantforelement1.
• IndisplayC,youcansetthescalingconstantforelement2.Thesettingmenuforelement2is
not displayed on the WT332E.
• IndisplayD,youcansetthescalingconstantforelement3.
External Current Sensor Measurement Range
After you have set the scaling constant, select a measurement range that corresponds to the rated
output of the external current sensor. You can also select to enable the auto range feature.
In menu configuration mode, the measurement range is set from the current measurement range
setting menu. In quick configuration mode, you can set the measurement range while continuing to
display the measured data.
For information about how to select menu configuration mode or quick configuration mode, see section
2.3.
Selecting a Current Range (External Current Sensor Range)
Example 1:
 Ifyouareusingthe96030Clamp-onProbe(whichhasa2.5mV/Aconversionratio)tomeasurea
currentof200A,theoutputvoltageoftheprobewillbe2.5mV/A×200A=500mV.
Therefore, you should set the current range (external current sensor range) this instrument to the
500mVrangethatisavailablewhenthe/EX2optionisinstalled.
Example 2:
 Ifyouareusingthe96030Clamp-onProbe(whichhasa2.5mV/Aconversionratio)tomeasurea
currentof60A,theoutputvoltageoftheprobewillbe2.5mV/A×60A=150mV.
Therefore, you should set the current range (external current sensor range) of this instrument to the
200mVrangethatisavailablewhenthe/EX2optionisinstalled.
Example 3:
 Ifyouareusingthe96031Clamp-onProbe(whichhasa1mV/Aconversionratio)tomeasurea
currentof200A,theoutputvoltageoftheprobewillbe1mV/A×200A=200mV.
Therefore, you should set the current range (external current sensor range) of this instrument to the
200mVrangethatisavailablewhenthe/EX2optionisinstalled.
Example 4:
 Ifyouareusingthe96001Clamp-onProbe(whichhasa10mV/Aconversionratio)tomeasurea
currentof200A,theoutputvoltageoftheprobewillbe10mV/A×200A=2000mV=2V.
Therefore, you should set the current range (external current sensor range) of this instrument to the
2.5Vrangethatisavailablewhenthe/EX1optionisinstalled.
2.4 Setting the Measurement Ranges When Using an External Current Sensor (Option)

YOKOGAWA WT310E Specifications

General

Brand	YOKOGAWA
Model	WT310E
Category	Measuring Instruments
Language	English