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GENERAL DESCRIPTION
The 4700 AC Watt Meter Calibration System
consists of two chassis. It provides independent
control of voltage amplitude, current amplitude, phase angle (power factor), frequency
and disk
revolution count. The 4700 System can be remotely programmed over the GPIB
Bus or it can be
operated manually via front panel controls. This is a direct, controlled calibration
procedure which
is preferred to the substitution method or the “existing power” comparison technique.
It provides
calibrated inputs with minimal, controlled distortion.
SPECIFICATIONS
OUTPUT
Output Voltages (Amplitudes)*: 100Vac to 130Vac, 200Vac to 280Vac,
480Vac to 490Vac in
1V increments accomplished in 12 ranges.
Output Currents*: 100A, 50A, 30A, 15A, 10A, 5A, 2.5A and 10A, 5A,
3A, 1.5A, 1.0A, 0.5A,
0.25A (light load).
*Certain other voltages, between 50V and 600V and certain other
currents, between 2.5A and
100A can be substituted. Details available on request.
Creep Test: Zero current is settable to provide for creep tests.
Selectable Output Frequencies: 50Hz, 60Hz and 400Hz.
Phase Angle Control: The phase angle is settable ±70° in 1° increments.
This provides control
for the power factor measurements.
System Accuracy: The overall system accuracy at unity power factor
is ±0.05%. N.I.S.T.
traceable certification is provided.
Distortion: 0.5%.
Load Regulation: 0.005%.
Line Regulation: 0.0025%.
Elapsed Time Calculation: The system accepts a pulsed input. This
may be from an electronic
watt-hour meter output or from an optical pick-up observing the rotating disk. The
revolution count
of the meter’s disk is selectable in either the local or the remote mode. The elapsed
time is
displayed.
Programming: System 4700 may be operated in the local mode or in remote
via the GPIB
Interface Bus. All locally controlled functions can be controlled in the remote
mode as well.
GENERAL
Power (Switch Selectable): 115Vac or 220Vac, 50Hz to 60Hz.
Power Consumption: 4701, 200W; 4702, 200W; total system, 400W.
Temperature Coefficient: 50ppm/°C.
Operating Temperature: 10°C to 50°C.
Dimensions: 4701, 19" (48.3cm) wide, 3.5" (8.9cm) high; 18" (45.8cm)
deep. 4702,
19" (48.3cm) wide, 7" (17.7cm) high, 14" (34.9cm) deep.
Weight: 4701, 20lbs. (9.1kg) net; 25 lbs. (11.3kg) shipping. 4702,
40 lbs. (18.1kg) net; 45 lbs.
(20.4kg) shipping. Total system 60 lbs. (27.2kg) net; 70 lbs. (31.7kg) shipping.
Specifications and prices are subject to change without
notice.
Copyright ©
February 23, 2006 Krohn-Hite Corporation.
All rights reserved.
15 Jonathan Drive, Unit 4, Brockton, MA 02301-5566 U.S.A.
Tel: (508) 580-1660; Fax: (508) 583-8989; info@krohn-hite.com
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