User’s Manual Smart Digital Power Meter
Instruments.uni-trend.com
16
/
34
The four window display as shown in the following figure.
3.2.2 Alarm for Over Range
These situations will be regarded as over range.
1. The measured value of voltage and current exceeds 120% of the rated range;
2. The peak value of voltage and current exceeds 170% of the rated range
；
“--OL-”will be appear when the range is exceeded.
3.2.3 Alarm for the Lower Measured Value
The alarm will be appear if the measured value of voltage is less than 3V or the measured value of current is
less than rated value 0.1%.
1. Voltage, current, power displays “0”.
2. Power factor displays “-----”.
3.2.3 Alarm for Break Off
When switch measurement range and function, “-----”will be appear for a while.
3.2.4 Hold (Data-Hold)
Press Hold key and the indicator will be illuminated, the measurement value will keep display and the data will
not refresh. Press it again, the indicator will be extinguished and the data will be update.
3.2.5 Lock (Key Lock)
To prevent from error operating during measurement, key lock function can set other key be invalid (Lock
state). Press Lock key and the indicator light will be illuminated. This key will be no response. It need to long
press Lock key for 1s and the indicator light will be extinguished. After that, the key will turn to enable state.
