The Arbiter Systems^®, Inc. Model 928A Power System Multimeter^TM has two identical measurement channels, Channel A and Channel B. Each input channel has a voltage input and a current input. Current inputs are intended for use with external CTs having a nominal output of 0 to 1 Arms or 0 to 1 Vrms. For basic measurements (voltage, current, frequency, and phase angle) any combination of inputs may be used. For power and energy measurements (active power, apparent power, reactive power, and power factor), one voltage and one current must be selected.
 

0 to 660 Vrms

1.2 megohm, differential

Current:

0.01 to 1 Arms (underrange to < 1 mA) (or 0 to 1.2 Vrms)

0.01 ohm maximum (current input style) or 100 kohms nominal (voltage input style)

Operator Interface:

128 x 64 graphic LCD

30 key keypad

USB

512 KB flash

User setups, Real Time Clock, Approximately 400 KB measurement data

Batteries (not included):

4-AA Cells, alkaline or NiMH

30 hours typical with alkaline cells. 60 hours typical with NiMH

External (not included):

+7 Vdc, unregulated

< 100 mA

5.5 x 2.0 mm, center positive

Voltage:

Wideband: True rms, 3 kHz Bandwidth, Narrowband: Fundamental magnitude

0.1% of reading

Current:

Wideband: True rms, 3 kHz Bandwidth, Narrowband: Fundamental magnitude

0.1% of reading (current),

1% of reading (low current range)

Phase Angle, A-B:

0 to 360° or ±180°

0.1°

Underrange < 1° typical

Frequency:

50 or 60 Hz ±5 Hz

0.005% of reading

Harmonics:

Channel A and Channel B, simultaneous

2^nd to 50^th Harmonic (50 or 60 Hz fundamental)

0.1% THD +5% reading

THD; K-factor; Amplitude bar graph; and individual harmonic magnitude and phase (simultaneous)

Channel A and/or Channel B

Power / Energy Quantities:

0 to 99999 MVA or MVAh

±99999 MVAR or MVARh

±99999 MW or MWh

±1.0000 PF, lead or lag

0.1% of VA, for VA, VAR, and W 0.001 PF

Dimensions:

196mm x 101mm x 38 mm (7.75" x 4" x 1.5")

Weight:

1 kg (2.2 lbs.), maximum

-10° to +50° C

 -40° to +75° C

Non-condensing