MANUAL CW FEATURES
The manual series front panel knobs
(10 turn potentiometers) allow quick
adjustment of voltage, current and
frequency settings. Frequency and
voltage can be programmed remotely
using a 0 to 5V analog signal. LED's
indicate: output-on, voltage or current
mode operation, fault and slave
modes. Models can also be paralleled
in the field or configured for three
phase operation using an optional
factory supplied cable. Current
shutdown or foldback modes can be
selected from a rear panel switch.
PROGRAMMABLE CW FEATURES
Front panel encoder knobs allow
programming of voltage, current and
frequency settings. Programmed or
measured values can be viewed on the
two LED displays through push button
selection. Menu push buttons enable
setting system configuration including
parallel or three phase operation.
This menu also allows setting current
shutdown or foldback modes. Remote
IEEE-488.2 and RS 232 control
interfaces are standard. LED’s
indicate: high or low range output
voltage, measure or program mode,
voltage or current mode operation
and output-on. LED’s indicate
menu/status, remote control, lockout
and fault conditions. Digital Signal
Processing (DSP) based measure-
ments include voltage, current
(amperes, peak amperes, crest
factor), power (watts, VA and power
factor) and frequency.
CW SPECIFICATIONS MANUAL (M) PROGRAMMABLE (P)
OUTPUT
Power
CW 801 800 VA
CW 1251 1250 VA
CW 2501 2500 VA
Power factor of load 0 lag to 0 lead
Phase All models single phase output
Voltage
Ranges 0 to 135 VRMS or 0 to 270 VRMS, user selectable
(consult factory for custom output voltages)
Accuracy ±1% of range (>5 VAC out) ±0.1% of range <100 Hz, ±0.2% of range,
>100 Hz (>5 VAC out)
Resolution 0.1 VRMS
Total Harmonic Distortion 0.25% typical <100 Hz add 0.5%/100 Hz above 100 Hz
AC Noise Level <50 mVRMS typical for CW 801 & CW 1251, <100 mVRMS typical for CW 2501
Amplitude Stability ±0.1% of full scale over 8 hours at constant ±0.05% of full scale over 8 hours at constant
line, load and temperature after 15 minute line, load and temperature after 15 minute
warm-up typical warm-up typical
Load regulation ±0.1% of full scale voltage for a full resistive load to no load
(<10 mVRMS typical, measured at point of sense)
Line regulation ±0.1% of full scale voltage for a ±10% line change from nominal line voltage
(<5 mVRMS typical, measured at point of sense)
Remote voltage sense Compensation for up to 5 VRMS total lead voltage drop
Current
CW 801 6.0 ARMS in 135 VAC range or 3.0 ARMS in 270 VAC range
CW 1251 9.4 ARMS in 135 VAC range or 4.7 ARMS in 270 VAC range
CW 2501 18.6 ARMS in 135 VAC range or 9.3 ARMS in 270 VAC range
Accuracy ±0.5% typical ±0.5% max
Resolution 0.1 ARMS 0.01 ARMS
Frequency
Range 45 to 500 Hz (45 to 1000 Hz optional on programmable unit only)
Accuracy ±0.5% typical ±0.02% max
Resolution 0.1 Hz 0.1 Hz, 0.01 Hz for remote programming
(48 Seiten)
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