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2.2
METERING SPECIFICATIONS
2.2.1 VOLTMETER SPECIFICATIONS
Three voltmeter inputs are provided, one per phase. Both Voltage Line-to-Neutral (VLN) and Voltage
Line-to-Line (VLL) voltages are metered.
Vrms Meter Range:
Display Resolution:
Accuracy (50-500 Hz):
Accuracy (20-5000 Hz):
NOTE: Some load voltage may be displayed with NO LOAD attached due to the sensitivity of the
metering circuits.
NOTE: Power source voltmeter scaling is internally fixed at 50:1
e.g. 50 VAC at load = 1 VAC input to UPC = 50 VAC displayed.
2.2.2 AMMETER SPECIFICATIONS
Three ammeter inputs are provided, one per phase. Both Peak and RMS values are displayed. Current
crest factor is displayed as the ratio: Ipk/Irms.
Amp Meter range:
DISPLAY Range:
DISPLAY Resolution:
Accuracy (50-500 Hz):
Accuracy (20-5000 Hz):
NOTE: The AMPS TO VOLTS RATIO is set via a DIP-switch located on the UPC METERING PCB. See
section 3.4.2. This ratio may be displayed with the UPC STATUS display (fn,3,3).
NOTE: Some load current may be displayed with NO LOAD attached due to the sensitivity of the
metering circuits.
2.2.3 kVA METER SPECIFICATIONS
kVA metering is provided by multiplying the metered volts times the metered amps values. Display
range and resolution is XXX.XXX kVA. The Remote interface may provide 3 digits of precision (digits to
the right of the decimal point).
Accuracy is ± 1% of full scale over the full range of ambient conditions.
354 VLN, 708 VLL A.C.
0.1 VAC rms.
The Remote interface may provide up to 3 digits of precision
(digits to the right of the decimal point).
± 0.25% of reading + 0.1% F.S. @ 25ºC
± 0.5% F.S. @ 25º to 50ºC.
Amps to Volts ratio x 10 (divided by 3 if 3 Φ form is used)
XX.XX Amps rms or Peak
0.01 Amps rms or Peak. The Remote interface may provide 3
digits of precision (number of digits to the right of the decimal
point).
± 0.25% of reading + 0.1% F.S. @ 25ºC
± 0.5% F.S. @ 25º to 50ºC.
13
SECTION 2
SPECIFICATIONS
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