The Arbiter Systems^®, Inc. Model 928A Power System Multimeter^™ 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.

1 to 660 Vrms

1.2 megohm, differential

0.01 to 1.2 Arms or 0.01 to 1.2 Vrms

to < 1 mA or 1 mV

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

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

0.1% of reading or ±5 mV, whichever is greater (voltage)
0.1% of reading + CT errors (current)
1% of reading + CT errors (low current range)

0 to 360° or ±180°

0.1°

< 1° typical

50 or 60 Hz ±5 Hz

0.005% of reading

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)

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

128 x 64 graphic LCD

30 key keypad

USB

512 KB flash

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

4-AA Cells, alkaline or NiMH (not included)

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

+7 Vdc, unregulated (not included)

< 100 mA

5.5 x 2.0 mm, center positive

200.0 x 104.2 x 37.4 mm (7.9 x 4.1 x 1.5 in.)
381 x 305 x 299 mm (15 x 12 x 9 in.), shipping

1 kg (2.2 lbs), net
2.5 kg (5.5 lbs), shipping

Operating: 0 °C to +50 °C
Nonoperating: -40 °C to +75 °C

Noncondensing