B&K Precision 1730A - Manual - Manual (Page 24)

23
1710A/1730A CALIBRATION
If readjustment is required, use the following procedure.
Locations of the adjustments are shown in Fig. 11. The meters
may be mechanically zeroed through their front panel access
holes prior to any calibration.
1. Set the front panel controls as follows:
Coarse and Fine VOLTAGE controls fully clockwise.
CURRENT control fully clockwise.
High-Low switch to Low.
Power switch to On.
2. Connect the multimeter to measure the voltage at pin 7 of
IC2 with respect to the front panel red (+) output jack.
Adjust R21 for -5.00 volts on the multimeter.
3. Connect the multimeter to measure the voltage at pin 1 of
IC2 with respect to the front panel red (+) output jack.
Adjust R63 for 0 ±10 mV on the multimeter.
4. Connect the multimeter to measure the DC voltage
between the black (-) and red (+) output jacks. The
voltage should be 30 to 32 volts, the green CV indicator
should be lit, and the red CC indicator should be off.
5. Set the front panel Fine VOLTAGE control for a reading
of 30.0 volts on the multimeter. Adjust upper R54 for a
front panel meter reading of 30.0 volts on the
VOLTAGE meter.
6. Set the front panel Coarse VOLTAGE control for a reading of
10 volts on the VOLTAGE meter.
7. Set High-Low switch to High.
8. Connect the multimeter to read the DC current between the
black (-) and red (+) output jacks, using the 10 amp range. The
red CC indicator should light and the green C V indicator
should go off.
9. Set the front panel CURRENT control for a reading of 1.00
amps on the multimeter for the Model 1710A, or 3.00 amps
for the Model 1730A. Adjust R56 for a front panel meter
reading the same as the multimeter.
10. Set the High-Low switch to Low, the multimeter should read
0.25 ± 2 counts for the Model 1710A, or 0.50 ± 2 counts for
the Model 1730A.
INSTRUMENT REPAIR SERVICE
Because of the specialized skills and test equipment required for
instrument repair and calibration, many customers prefer to rely
upon B+K Precision for this service. We maintain a network of
B+K Precision authorized service agencies for this purpose. To use
this service, even if the instrument is no longer under warranty,
follow the instructions given in the WARRANTY SERVICE
INSTRUCTIONS section of this manual. There is a nominal charge
for instruments out of warranty.
MAINTENANCE