7-14
IM WT310E-02EN
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, 5 s, 10 s, 20 s or Auto.
* In the case of Auto Update Rate cannot use the Integration function and store the measurement data.
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.
Crest factor 3, 6
• When the measured value exceeds 140% of the rated range
* WT310EH:40 A range
When the measured value exceeds 110% of the rated range
Crest factor 6A
• When the measured value exceeds two times of the above setting.
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.
* In the case of Auto Update Rate cannot store the measurement data.
Setup information
Saves/Loads four patterns of setup information.
Number of blocks which can be stored
Model
normal measurement
harmonic measurement
WT310E/WT310EH
9000
700
WT332E
4000
300
WT333E
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 or 6A: 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 or 6A: 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
100 kΩ
Update interval
Same as the data update interval.
* Approximately the same period as the signal’s period when the data update interval is set to Auto.
But, at least 100 ms.
Temperature coefficient
±0.05%/°C of FS
7.4 Features
