Clark Hess Communication Research Corp - 255 - Digital Multimeter
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Gerät:
255
Datum:
1983
Kategorie:
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Informationen
The Model 255 digital V-A-W meter provides TRUE RMS
measurements of VOLTAGE, CURRENT, and POWER. These
measurements are essentially independent of the waveshape
and of the power factor from DC up to frequencies of hundreds
of kilohertz. Voltage and current readings are typically
within 1°/o
to 400 kHz for sine waves. The power in a 100 kHz square wave
may normally be measured within 2%.
WIDE MEASUREMENT RANGE
AMPLE RESOLUTION
The Model 255 provides FOUR full scale current ranges from
5 mA to 5 A, THREE full scale voltage ranges from 20 V to 1000
V., TWELVE full scale power ranges from 100 mW to 5000 W
and TWELVE, increased resolution POWER X10 ranges from
10.00 mV to 500.0 W.
A full four digit display provides ± 1 digits of resolution
for full
scale ranges corresponding to 1000, 2000, or 5000 digits.
ISOLATED OUTPUTS AND PROGRAMMING
The meters have optically isolated, digital options of:
A. Parallel, four digit BCD output
B. Remote control of FUNCTIONS
C. IEEE-488 Talker/Listener Board.
The meters have an optional isolated ANALOG output. One
volt output for a Full Scale display reading.
CURRENT OR VOLTAGE RANGE EXTENSION
Full Scale CURRENT ranges down to 50.00 pA or VOLTAGE
ranges down to 1.000 V or 2.000 V are possible. External broad
band shunts or transformers allow CURRENT extension to
50.00 A or 500.0 A. External voltage dividers allow VOLTAGE
extension to 3500 V. Full Scale POWER for each case is equal
to the VOLTAGE X CURRENT product.
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DEALS WITH MANY
DIFFICULT MEASUREMENTS
The Model 255 is ideally suited to measuring almost any non-
sinusoidal and/or low power factor waveshape. Typical uses are
in connection with SW ITCHING POWER SUPPLIES,
TRANSFORMER LOSSES, FLUORESCENT LAMP
BALLASTS, R-C FILTER RECTIFIER CIRCUITS, SCR CIR
CUITS, MERCURY-ARC LAMP CIRCUITS, SERVO
SYSTEMS, MOTOR TESTING, ULTRASONICS, MOV LOSS
TESTING, AUTOMATIC TEST EQUIPMENT, SODIUM LAMP
BALLASTS, FERRITE CORE LOSSES, TELEVISION SET
LOSSES, AND ELECTRIC AUTOMOBILE EFFICIENCY
MEASUREMENTS.
EASY TO USE/HARD TO DAMAGE
The Model 255 is an all solid state, digital readout instrument.
The V-A-W meter is complete, self contained instrument that is
easy to use, hard to damage, easy to service, and easy to
maintain.
LOW CIRCUIT LOADING
An imput impedance of five Megohms for the VOLTAGE
terminals coupled with a full scale voltage drop of 100
millivolts
across the CURRENT terminals cause negligible circuit loading
or errors in most practical cases.
PACKAGING/PROTECTION
The Model 255 is housed in a heavy duty aluminum case. The
three lowest current range shunts are also diode and fuse
protected.
1 Handbuch
Reparatur und Bedienungsanleitung
Dokumenttyp:
Reparatur und Bedienungsanleitung
Seitenanzahl:
98
Größe:
3,3 MB
Sprache:
Englisch
Revision:
Dokument-ID:
255-2940
Datum:
Januar 1983
Qualität:
Gescanntes Dokument, alles ist lesbar.
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