Special ASX Series Operating Features
Continuous Self Calibration
Provides for exceptional accuracy of the AC output Voltage. When enabled, accuracy
improves to ±0.1% referenced to the power source internal voltmeter.
Programmable Dynamic Output Impedance - Prog-Z (optional on UPC1/3)
Programmable Output Impedance provides the operator with the ability to dynamically
control the output impedance of the AC Power Source. Using the output current term
as conditioned feedback signal to the output voltage circuits, positive or negative
impedance may be programmed. This control simulates the effects of, or compensates
for high peak current, distribution, or transformer losses of up to ±10%
of the output voltage.
This feature creates positive, negative, or zero output impedance (Zo)
• Compensates for line distribution or transformer losses.
• Simulates a soft power line for product testing. Compensation range is ±10%
of the output voltage.
Waveform Library
Up to 22 different waveforms can be stored in the waveform library for execution
as part of a steady state program or for substitution in any output phase as part
of a transient test program. Memory location #1 is a non-editable high resolution
sine wave. Locations 2-22 are editable and can be substituted in any output phase.
An unlimited number of waveforms may be stored on the computer for those using a
programmable UPC.
Waveform Edit
A full-featured editor permits modification of a stored waveform in both time and
frequency domains. This method can be used to quickly create spikes, dropouts, notches
and other sub-cycle wave conditions. The resulting modified waveform is stored for
execution in steady-state or transient programs.
Waveform Analysis (optional on UPC1/3)
Provides both graphic (using LabView for Windows®) and numeric displays of the harmonic
structure of a voltage or current waveform. Each waveform is analyzed for its harmonic
content up to the 51st harmonic. Amplitude and phase are reported to the local display.
The LabVIEWT instrument driver displays numeric values as well as a graphic summary
of the harmonic spectrum.
Waveform Synthesis (optional on UPC1/3)
Quickly create virtually any AC test waveform by building it out of harmonics. The
process is as simple as keying in the magnitude and phase angle of each desired
harmonic up through the 51st. Additionally, waveforms can be created by downloading
from a host PC.
Time Based Transients
Create and execute transients that occur over a specified time segment to modify
the output waveform, voltage, and frequency for any or all phases. An output trigger
is provided for synchronizing external test equipment to the actual transient event.
Cycle Based Transients
Create and execute transients that substitute a waveform in any or all phases for
1 to 100 cycles. The waveform being substituted can be selected and/or modified
from the waveform library.
Power Source Specifications
Output Frequency
15 to 1,200 Hz. Full Power
Line Regulation:
0.1% max for a ±10% line change.
Load Regulation:
0.25% 15 to 400 Hz., 0.50% 400 to 1,200 Hz. With external sense enabled. Improves
to less than 0.1% with external sense and CSC enabled.
Output Distortion:
0.25% THD 15 to 200 Hz., 0.50% THD 200 to 1,200 Hz.
Ripple and Noise:
-66 dB
Response Time:
60 microseconds typical, 10-90% load step.
Mechanical Specifications
All models are designed for operation in 19 inch equipment racks. Models 4 kVA and
higher have side handles for ease of handling.
Mounting:
Standard 19 inch rack. Slide rails are available as an option for all models.
Height:
See model table above for panel height.
Depth:
Approximately 24 inch, from the front panel to the rear of the chassis.
Cooling:
Front or side forced air intake with rear exhaust. Automatic Fan Speed Control for
low acoustic noise and extended fan life.
Dual Range Output Magnetics Options
ASX Series Power Sources can be equipped with output transformers to provide an
alternate output voltage range. Selection of direct or transformer coupled range
is performed by the controller via front panel or bus command. The standard frequency
range for transformer coupled outputs is 45 to 1,200 Hz. Standard output ratios
are 1.5:1, 2.0:1, and 2.5:1. Transformer outputs are supplied internally or externally
via a Magnetics Module as listed in the above table. Consult the factory for additional
information regarding special output ranges not listed above.
UPC Series Controller Specifications
The latest additions to Pacific’s SmartsourceT family of UPC Controllers are the
UPC-1M, UPC-3M, UPC-1 and UPC-3. The UPC Controller is a modular component of the
ASX Series and is available in four configurations ranging from 1 Phase to 3 Phase
and Manual Control to Programmable Control. The table below lists each model according
to key features.
All UPC Controllers include precise metering functions with data displayed via a
160 character LCD display. This, along with the 30-key front panel, provides the
industry's most powerful and user-friendly controller.
The UPC-1 and UPC-3 controllers are available with either the RS-232 or GPIB remote
interface. Commands are structured in accordance with SCPI (Standard Commands for
Programmable Instruments). The RS-232 serial port operates up to 38.4 Bps. The GPIB
interface is compatible with the IEEE-488.2.
Frequency:
Range: 15 to 1,200 Hz. Resolution: 4 significant digits, eg. 50.00, 400.0, etc.
Accuracy: ±0.01%, 15 to 1,200 Hz
Voltage:
Range: 0 to Vmax in 0.1 VAC steps. Accuracy: Executive voltage is within ±50
mVAC (0.05%) of command voltage referenced to the internal voltmeter with CSC engaged.
Phase Angle:
Phase Separation of Phases B and C are programmable 0 to 360° relative to phase
A on the UPC-3 controller. Phase separation is fixed at 120° and 240°, respectively,
on the UPC-3M controller.
Programmable Current Limit:
Programmable Current limit is provided on the UPC-1 and the UPC-3 controllers. Programmable
range is from 0 to Ipeak, max of the power source.
Output Voltmeter:
The Output Voltmeter is true RMS reading and each phase is measured independently.
Line to neutral and line to line voltages are displayed. Range: 0-354 VACL-N, 0-708
VACL-L. Resolution: 0.1 VAC to front panel, 0.001 VAC to remote interface. Accuracy:
±0.2% of range + cal. ref.
Output Ammeter:
Output Ammeter is true RMS reading and each phase is measured independently. RMS
and peak currents along with Crest factor are displayed. Range: 300% of system current
rating. Resolution: 0.01 AAC to front panel, 0.001 AAC to remote interface. Accuracy:
±0.2% of range + cal ref.
Power:
Measures True Power (kW), Apparent Power (kVA) and power factor. Range: Based on
ammeter. Resolution: 1.0 watts or VA to front panel, 1.0 watts or VA to remote interface.
Power Factor:
Calculated and displayed to three significant digits.