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User's Manual
meter to read out the required value, and record the data of the standard meter and UTE310 after the data
is stable, and then calculating the measuring error value to judge whether is within the error range. The
requirements of environment temperature of verification and calibration is shown the following table.
Item
Environment temperature ℃
Environment humidity % RH
Barometric pressure KPa
AC power supply voltage (V)
AC power supply frequency (Hz)
Ac power supply waveform
External electromagnetic field
interference
Notes: The inspect equipment should meet the specifications of the regular metrological verification,
and the measurement period is one year.
Wiring scheme of verification and calibration as shown in the following figure.
Instruments.uni-trend.com
Reference Value or Range
Ventilation
Sunlight
UTE310
23
45～75
86～106
100～240
50/60
Sine waveform
Avoid
Well-condition
Avoid direct sunlight
Calibration of Voltage and Current
Standard Power Meter
Reference Value or Range
± 5
± 2%
± 1%
ß = 0.05
Standard power source
UTE310 Digital Power Meter
94 / 99
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