Measure harmonics and view the results graphically on the
high contrast 240 x 64 graphic display. The two channels are
normalized to Channel 1 fundamental phase, so you can see,
for example, the relationship between current waveform
distortion and voltage phase.
Other key functions include a timer / counter for measuring
relay operating times, elapsed test times, or for counting
input rates and events, The 931A include a full three-phase
input section, for automated three-phase measurement
sequences, complete with multiple display modes:
Vector Display ― View
voltages, currents and phase angles with their vector
Voltage /Current Sequence Display
― view voltage, current and phase along with positive,
negative and zero sequence values.
Energy Display ― view voltage, current, phase,
frequency and energy quantities on one convenient display.
Trend Monitor and Recording System
― verify phase relation, phase rotation,
power direction, load balance.
• Transducer Calibration
• CT / PT Ratios.
• Extended Measurement Ranges.
Supports two main measurement channels. Channel 1 and
channel 2. Any voltage or current input signal may be
selected for either channel. For basic measurements
(voltage, current, frequency, phase angle) any combinations
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. For
three-phase measurements, the input configuration is
selected automatically, based on the measurement type (foe
example, 3-phase 4-wire 3-element)..