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VARTEK Corporation

  SPECIFICATIONS
MODEL W950
SINE/SQUARE WAVE WHEEL/MOTOR SUPPLY
 		  
OUTPUT VOLTAGE MODES:   Front panel selected via a four position rotary switch.
 
          START MODE:   Adjustable from 100% to 150% of the set run voltage via a separate front panel mounted 10-turn potentiometer.
 
          RUN MODE:   5.00 to 80.00VRMS L-N, in four ranges. These ranges are continuously adjustable via a front panel ten turn potentiometer.
 
     ON-STANDBY MODE:   Front panel mounted switch that removes the output from the rear panel output connector and places the instrument in the internal sense mode. THIS FEATURE MAY BE USED FOR GYRO BACK EMF TESTING.
 
START-RUN DECAY:   Wide range of timing is available by selecting an external capacitor which may be mounted on rear panel binding posts and adjusting a ten turn rear panel potentiometer. This feature permits controlling the rate of timing when ramping from the start mode to the run mode of operation.
 
OUTPUT CONFIGURATION:   Two phase or three phase front panel switch selected.
          NOTE: Three phase is a four wire wye configuration
 
WAVEFORM:   Sine Wave or Square wave front panel switch selected.
 
SINE WAVE:
          Distortion:		  
0.5% max THD
 
          SQUARE WAVE:
          Rise and Fall Time:
          Overshoot & Ringing:
          Tilt:
          DC Output:		  
15 usec, 10% to 90%
5% max
2% max
None due to transformer coupling.
 
OUTPUT CURRENT:
                       VOLTAGE RANGE
RANGE 1:     5.00 to 10.00
RANGE 2:     10.00 to 20.00
RANGE 3:     20.00 to 40.00
RANGE 4:     40.00 to 80.00
OUTPUT CURRENT/PHASE START OR RUN
2.0 amps
2.0 amps
1.0 amps
500 ma
 
OUTPUT FREQUENCY RANGE:   350Hz to 10KHz
(Sine Wave Operation Only)
 
FREQUENCY ACQUISITION TIME:   The automatic timing circuitry will require 15 seconds maximum to lock on any signal in the given frequency range.
 
EXTERNAL INPUT REQUIREMENTS:
          INPUT VOLTAGE:
          WAVE SHAPE:
          INPUT IMPEDANCE
 		  
5 to 15V Pk to Pk
Sine or symmetrical square wave or TTL.
100K OHM Nominal
 
          FREQUENCY:
                    SINE WAVE MODE:
                    SQUARE WAVE MODE:
                              2 PHASE
                              3 PHASE		  
Same frequency as derived output

4 times the desired output frequency.
6 times the desired output frequency.
 
LOAD:   Inductive, such as Gyro motors
 
AMPLITUDE STABILITY:
          Vs LOAD: SINE WAVE
                             SQUARE WAVE
          Vs LINE:
          Vs TIME:
          Vs TEMP:		  
+/-0.01% NL-FL with remote sense
+/-0.05% NL-FL with remote sense
+/-0.01% 105 to 125V line
+/-0.01%/week under constant conditions.
+/-0.005%/deg C average from 15 to 40 deg C.
NOTE: Measurements made with an average sensing voltmeter in the run mode. Specifications are in percent of the full range voltage as measured L-N.
 
AMBIENT TEMPERATURE:   0 to 50 deg C.
 
OVERLOAD PROTECTION:   The output may be short circuited indefinitely, recovery is automatic when the short is removed.
 
FRONT PANEL TEST POINTS:   Voltage and current for all phases are provided on the front panel. The current test points are transformer isolated and have a scale factor of 1 amp = 1 volt.
 
PHYSICAL SIZE:   15.75" max high standard 19" rack panel mount.
 
LINE POWER:   15V +/-10VAC,50/60 Hz, or 220/230/240 VAC, 50/60 Hz
 
Power Suplies RFQ
Power Suplies Application Note
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Vartek Corporation
420 South Perry Lane - Suite 5
Tempe, Arizona 85281 U.S.A.