Features:
- Phase-Sensitive Null Indicator
- Sensitive AC Electronic Voltmeter
- Precise AC Radiometry
- Impedance Meter
- Power Factor Meter
The North Atlantic 213C Series Phase Angle Voltmeters are solid-state
instrument which combines the ability to measure both phase angle and
magnitude of complex ac signals and vector components with respect to a
reference voltage. Designed for phase sensitive operation at a
pre-specified frequency withing 30 Hz to 10 kHz, it utilizes passive
phase shifter circuits to assure long-term stability and high accuracy
over the spectrum. Front panel controls permit instantaneous selection
of voltage ranges and functions.
As a total voltmeter, the
Model 213C is capable of measuring signals within a frequency range of
10 Hz to 100 kHz. The Model 213C has its frequency response limited to
that if the signal isolation transformer. The signal input voltage, in
the transformer mode, is limited to .75f (f=signal frequency in Hertz).
As a phase-sensitive null meter, the 2 μV nulling sensitivity of the
Model 213C permits high-resolution ratio-metric measurements. This
allows measurement of low-level voltages of the reference frequency in
the presence of noise, hum, and other spurious signals. As a phase
meter, angles are read on a parallax-free scale calibrated in 1°
increments.
The Model 213C also includes a front panel switch
for switching the transformer in or out of signal input circuit thereby
allowing isolation of either the Reference or Signal channel.
Operation Manual (QR Link)
Service Manual (QR Link)
Shorting Link (installed)
