Digital Power Meter 66203/66204 User’s Manual
2-2
Accuracy
Requirements
1. Temperature: 23°C±5°C
2. Humidity: 80%RH.
3. Input waveform: Sine wave
4. Power factor: 1.
5. Warm-up time: ≧30 minutes.
6. Connect the power cord to a three-prong power outlet with proper grounding.
Voltage / Harmonics Specifications
DC, 10Hz-1kHz 1kHz-10kHz Temperature Coefficient
% reading + % range (ppm of reading + ppm of range) /°C
0.1+0.08 (0.1+0.05*kHz)+0.08 120+150
Note:
1. The temperature coefficient accuracy is used for the situation when the
ambient is beyond the accuracy-permitted temperature. This accuracy should
be added into the voltage accuracy written above.
2. The permitted frequency of voltage harmonics is up to 6 kHz.
Current / Harmonics Specifications
DC, 10Hz-1kHz 1kHz-10kHz Temperature Coefficient
% reading + % range (ppm of reading + % of range) /°C
0.1+0.1 (0.1+0.05*kHz)+0.1 120+0.05
Note:
1. When measuring current, the voltage of 1/10 larger than the voltage range has
to be inputted for frequency generation, voltage calculation and current
measurement.
2. The temperature coefficient accuracy is used for the situation when the
ambient is beyond the accuracy-permitted temperature. This accuracy should
be added into the voltage accuracy and the current accuracy written above.
3. The power meter should be in a thermally stable environment with power
turned-on for at least 30 minutes before performing auto-calibration (Cali).
4. The permitted frequency of current harmonics is up to 6 kHz.
Specifications of the External Current Sensor input
DC, 10Hz-1kHz 1kHz-10kHz Temperature Coefficient
% reading + % range (ppm of reading + % of range) /°C
0.1+0.1 (0.1+0.05*kHz)+0.1 120+0.05
Note:
Add DC values 50uV to accuracies for the external current sensor range.
Active Power Specifications
DC 47Hz-63Hz 10Hz-1kHz 1kHz-10kHz
% reading+% range
0.1+0.1 0.1+0.1 0.1+0.18 (0.1+0.1*kHz)+0.18
Note:
1. The temperature coefficient is same as the temperature coefficient for voltage
and current.
2. Influence of power factor: Add the power reading × (0.0015/PF*Hz)% when
0<PF<1
Power Factor Specifications
Range Range : 0.0000-1.0000
Accuracy 0.001+(15ppm/PF)*Hz
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