YOKOGAWA WT3002E User Manual page 218

IM WT3001E-51EN
• Limit on Time Tmax during Which the Relative Voltage Change Exceeds the
Threshold Level
You can set the limit in the range of 1 to 99999 ms.
• Threshold Level
You can set the threshold level in the range of 1.00 to 99.99%.
• Judgement Conditions for Short-Term Flicker Value Pst
• Turning ON/OFF the Judgement of Short-Term Flicker Value Pst
You can select whether to include short-term flicker value Pst in the flicker
measurement judgement.
• ON: Include Pst.
• OFF: Not include Pst.
• Limit on Short-Term Flicker Value Pst
You can set the limit in the range of 0.10 to 99.99.
• Judgement Conditions for Long-Term Flicker Value Plt
• Turning ON/OFF the Judgement of Long-Term Flicker Value Plt
You can select whether to include long-term flicker value Plt in the flicker
measurement judgement.
• ON: Include Plt.
• OFF: Not include Plt.
• Limit on Long-Term Flicker Value Plt
You can set the limit in the range of 0.10 to 99.99.
• Constant N of the Calculating Equation of Long-Term Flicker Value Plt
You can set constant N in the range of 1 to 99.
Note
The long-term flicker value (Plt) is computed using the following equation.
Count
The variable Count in the equation is the measurement count of short-term flicker value (Pst)
that is set in section 12.3).
The variable N in the equation is the constant of the calculating equation of long-term flicker
value (Plt).
In general, set Count and N to the same value.
If N is set greater than Count, the short-term flicker value is measured the number of times
specified by Count. The short-term flicker values that are not measured are substituted with zeroes
in the above equation to calculate the long-term flicker value (Plt). N is set greater than Count such
as when the measured source automatically stops within the specified observation time.
Note
You can change the judgement conditions only when the flicker measurement status is Reset
or Complete.
12.4 Setting the Judgement Conditions
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Index
12-17