Keysight E3630A, Руководство по эксплуатации и обслуживанию

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5 Service Information
60 Keysight E3630A Operating and Service Manual
Adjustment And Calibration
Current limit adjustment
+6 V Supply. To adjust the current limit circuit in the +6 V supply, proceed as
follows:
1 Check the setting of the current limit by performing steps (16) and (17) on
page 51 . (Be sure to set the output voltage to 6 volts.) If reducing the load
resistance permits the current to exceed 2.9 A, stop, turn R6 slightly clockwise,
and repeat the test. If, instead, the current begins to fall before it reaches
2.6 A, turn R6 slightly counter clockwise and repeat the test.
2 Recheck the setting and readjust R6 until the test shows that the current limit
circuit begins to reduce the current when a decreasing load resistance
increases it to 2.75 A ± 5%.
Meter calibration
Panel Voltmeters.
To calibrate voltmeter, proceed as follows:
1 Connect DVM 20 V output terminal and COM terminal of the supply.
2 Turn on the supply.
3 Set the output voltage below 18 V (ex, 15 V), and adjust R11 on the display
board until front panel VOLTS display reads exactly DVM value. Next, set the
output voltage above 20 V (ex, 21 V) and adjust R17 on the display board until
front panel VOLTS display reads exactly DVM value.
Panel Ammeter. To calibrate ammeter for +20 V output and –20 V output,
proceed as follows:
1 Connect R
S
b20 V output terminal and COM terminal and connect
DVM across R
S
.
2 Push +20 V meter switch and turn ±20 V VOLTAGE control fully clockwise.
NOTE
No other voltage output needs to be calibrated after calibrating the voltmeter of
+20 V output.