Pacific Power Source UPC-32, Руководство по эксплуатации

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SECTION 8 CALIBRATION
98
8.2 MANUAL CA
LIBRATION PROCEDURE (cont’d)
WARNING
OBSERVE THE FOLLOWING WHEN CALIBRATION IS REQUIRED:
1) REMOVE ALL JEWELRY FROM ARMS AND NECK WHEN CALIBRATING EQUIPMENT.
THIS PREVENTS THE POSSIBILITY OF SHORT CIRCUIT THROUGH THE JEWELRY,
CAUSING BURNS TO, OR ELECTROCUTION OF, THE OPERATOR.
2) WEAR SAFETY GLASSES TO PREVENT EYE INJURY DUE TO FLYING
PARTICLESCAUSED BY ACCIDENTAL SHORT CIRCUIT CONDITIONS.
3) DO NOT REMOVE ANY PANELS OR COVERS WITHOUT FIRST OPENING ALL
CIRCUIT BREAKERS AND THEN REMOVING THE INPUT SERVICE.
8.2.1 OSCILLATOR GAIN CALIBRATION
The first step in the MANUAL calibration process calibrates the oscillator. Nominally, the oscillator produces
5.000 VAC
rms
when the system is set for 125.0 VAC
rms
(system configured for DIRECT COUPLED output),
depending on system gain. See ( Figure 8.2 ) for control location. To set this level:
1. Remove top cover of the chassis.
2. Turn on the system. Load and Execute a program with the following parameters:
PROGRAM: #1 FORM=3 COUPLING=DIRECT
FREQ=60 Va=125.0 Vb=125.0 Vc=125.0
WFa=1 WFb=1 WFc=1
#SEGS=0 Ilim=50 PHb=120° PHc=240°
3. Ф A Oscillator: Measure the power source Phase A output voltage to Neutral using the 4½ digit
DVM. Adjust R70, Phase A Oscillator Gain, until the output voltage is 125.00 VAC ±0.05 VAC
rms
.
4. Ф B Oscillator: Measure the power source Phase B output voltage to Neutral using the 4½ digit
DVM. Adjust R70, Phase B Oscillator Gain, until the output voltage is 125.00 VAC ±0.05 VAC
rms
.
5.
Ф
C Oscillator: Measure the power source Phase C output voltage to Neutral using the 4½ digit
DVM. Adjust R70, Phase C Oscillator Gain, until the output voltage is 125.00 VAC ±0.05 VAC
rms
.
6. Verify the output frequency is 60.00 Hz. ± .01%. There is no adjustment for frequency.
7. Turn off the system and replace the top cover of the chassis