Number of displayed digits Select 5 or 4 digits.
Data update interval Select 0.1 s, 0.25 s, 0.5 s, 1 s, 2 s, or 5 s.
Response time Data update rate × 2 or less
(The time it takes to reach the accuracy of the final value when the displayed value changed from 0
to 100% or 100 to 0% of the rated range)
Auto range monitor The indicator illuminates when the input signal meets the conditions for auto range switching.
Overrange display Overrange “- - - oL -” is displayed for the following conditions.
When the measured value exceeds 140% of the rated range
* WT310HC:40 A range
When the measured value exceeds 110% of the rated range
Hold Holds the displayed value.
Single update Updates the displayed value once each time the SINGLE key is pressed during Hold.
MAX hold Holds the maximum displayed value of U, I, P, S, Q, U±pk, I±pk, and P±pk.
7.4.7 Internal Memory
Item Specifications
Measured data Recall the stored measurement data by a communication command.
Storage interval
Data update interval or in the range of 1 s to 99 hrs 59 min 59 s.
There is no backup function for stored measurement data.
Setup information Saves/Loads four patterns of setup information.
Number of blocks which can be stored
Model normal measurement normal +harmonic measurement
WT310/WT310HC 9000 700
WT332 4000 300
WT333 3000 200
* Harmonic Measurement (/G5 Option)
Harmonic measurement function is turned ON.
7.5 External Current Sensor Input
(/EX1 and /EX2 options)
Item Specifications
Allows input of voltage output type current sensor signal. For detailed input specifications, see section 7.1, “Input.”
• Measurement range of the /EX1 option
Crest factor 3: 2.5 V, 5 V
, 10 V
Crest factor 6: 1.25 V, 2.5 V, 5 V
• Measurement range of the /EX2 option
Crest factor 3: 50 mV, 100 mV
, 200 mV, 500 mV, 1 V, 2 V
Crest factor 6: 25 mV, 50 mV, 100 mV, 250 mV, 500 mV, 1 V
7.6 D/A Output (/DA4, /DA12 Options)
Item Specifications
Output voltage ±5 V FS (approx. ±7.5 V maximum) against each rated value
Number of output channels 4 outputs for products with the /DA4; 12 outputs for products with the /DA12 option
Output items Set for each channel.
U,
I,P,S,Q,λ,Φ,fU,fI,Upk,Ipk,WP,WP±,q,q±,MATH
Accuracy ±(accuracy of each measurement item + 0.2% of FS) (FS = 5 V)
D/A conversion resolution 16 bits
Minimum load 100kΩ
Update interval Same as the data update interval.
T
emperature coefficient ±0.05%/°C of FS
7.4 Features
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