Clark Hess Communication Research Corp 6000 Level Meter
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Model:
6000
Date:
1987
Category:
Group:
Description:
Phase Meter
Information
GENERAL DESCRIPTION
The Model 6000 Phase Meter is a precision instrument which
measures the phase angle difference between two similar
voltage waveforms with the same frequency in the range from
5Hz to 500kHz with a typical accuracy of 0.02° and with a
resolution of 0.01°. The voltage waveforms may have
independent amplitudes anywhere in the range from lOmV to
350V RMS which the Meter accommodates automatically by
autoranging. A peak to peak voltage waveform less than 56mV
or greater than 882V is indicated respectively by the
illumination of an UNDERRANGE or OVERRANGE LED lamp.
The phase angle is displayed in Degrees on a 5 Digit High
Efficiency LED display over the span from -180° to +360°
which is covered by two ranges of 0° to 360° and -180° to
+180°. The Model 6000 autoranges from one range to the other
whenever the phase angle approaches within 10° of the range
limit. Phase angle discontinuities of ±360° are only
apparent when autoranging occurs from the high end of the 0°
to 360° range and from the low end of the -180° to +180°
range. A RANGE toggle key on the front panel of the Meter
permits manual transitions from one range to the other. The
current range is always indicated by the illumination of an
appropriate LED lamp. The RANGE toggle permits operation to
be kept on the 0° to 360° range when the phase difference
between two pulse waveforms is being measured.
An OFFSET toggle key is also located on the front panel. An
LED lamp indicates the active or ON state of the OFFSET.
Pressing this key once activates the OFFSET and causes the
current phase angle indication to be subtracted from all
subsequent phase angle indications with the result that a
new "Phase Origin" is established. A new range of ±180°
about this origin is also established. Within this range no
±360° discontinuities occur even if internal autoranging
takes place. At ±180° discontinuities do however occur.
Pressing the key a second time returns the Meter to its
normal operating mode. The Offset toggle may be used to
refine the calibration of the Phase Meter at higher
frequencies. If the same signal is placed into both the
SIGNAL and the REFERENCE INputs and the OFFSET is activated,
small constant phase errors are removed.
The Model 6000 also allows the user to deactivate the
internal low pass filtering to obtain higher accuracy when
measuring the phase angle between two square waves of
unequal amplitudes. The filtering is toggled by holding down
the LOCAL key and then pressing the RANGE key. When the
filtering is removed
Manual type:
Service and User Manual
Pages:
104
Size:
31.81 Mbytes (33351973 Bytes)
Language:
english
Revision:
Manual ID:
Date:
1987 01 01
Quality:
Scanned document, all readable.
Upload date:
2017 04 16
MD5:
a62701cce6c48ed0d6fd0029b57009c2
Downloads:
643