YOKOGAWA WT110 User Manual page 64

Display Resolution during Integration
Display Function of Integrator Values
IM 253401-01E
The display resolution for integrated values is 100000 counts. The decimal point shifts
automatically since the integrated value increases in accordance with the elapsed time.
The decimal point shifting timing is determined automatically according to the selected voltage
and current measuring ranges. After the rated value is set for both voltage and current
measuring ranges, the decimal point shifts when the integrated value exceeds 100000 counts.
However, the minimum measurement unit is 1/1000 times the power range which is determined
by the rated voltage and current ranges, and the maximum measurement unit is MWh (or MAh).
The following shows the watt hour values when rated values are input at a 150V/5A range. The
below mentioned "h", "m" and "s" stand for hour, minutes and seconds respectively.
Elapsed time Integrated value
0s 0.000mWh
2s 416.67mWh
:
4s 833.33mWh
5s 1.0417Wh
:
47 9.7917Wh
48 10.000Wh
:
7m59s 99.792Wh
8m00s 100.00Wh
:
1h00m00s 750.00Wh
2h00m00s 1.5000kWh
:
13h00m00s 9.7500kWh
14h00m00s 10.500kWh
By selecting the display function, you can display the polarity of the integrator values.
Display function Measurement mode
Wh RMS,VMEAN,DC
*1
Wh± RMS,VMEAN,DC
*1
Wh± RMS,VMEAN,DC
Ah RMS,VMEAN
DC
*2
Ah± RMS,VMEAN
DC
*2
Ah± RMS,VMEAN
DC
*1 When the Wh function is selected, pressing the FUNCTION key once or twice will result in Wh±.
Pressing the FUNCTION key once will result in displaying the positive watt hour value, whereas
pressing the FUNCTION key twice will result in displaying the negative watt hour value. In case of
the negative watt hour value, "–" will appear in front of the value.
*2 When the Ah function is selected, pressing the FUNCTION key once or twice will result in Ah±.
Pressing the FUNCTION key once will result in displaying the positive ampere hour value, whereas
pressing the FUNCTION key twice will result in displaying the negative ampere hour value. In case
of the negative ampere hour value, "–" will appear in front of the value.
Note
• When negative integrated values are displayed, the maximum display reading will become –99999MWh/
MAh because of the added minus character.
• When the measurement mode is RMS/VMEAN and the current input drops below 0.5% of the rated
range, the ampere hour value will become zero (0).
• During integration is in progress (until being reset), operation of other functions are restricted. Refer to
page 7-8 for more details.
7.1 Integrator Functions
Display contents
both positive and negative watt hour values
positive watt hour value
negative watt hour value
total ampere hour values
both positive and negative ampere hour values
total ampere hour values (same as Ah)
positive ampere hour value
–0
negative ampere hour value
7
7-3