Constant Current Full Scale Calibration; Power Limit Calibration; Resistance Programming Full Scale Calibration - HP 6033A series Service Manual

Constant Current Full Scale Calibration

Note:
This procedure requires that CC PROG ZERO (A8R29) and I-MON F. S. (A2R9) be adjusted within
specifications. If they are not, perform Constant Current Zero and/or Current Monitor Full Scale
Calibration before proceeding.
a. Connect Rm current-monitoring shunt:
(10 milliohm, 6033A)
(100 milliohm, 6038A)
0.05% or better across power supply output terminals.
b. Send string:
"VSET 5; ISET 30; OUT ON" (6033A).
"VSET 5, ISET 10; OUT ON'' (6038A).
c. Attach DVM across Rm. Allow several minutes (3 or more) to ensure thermal settling.
d. Adjust A8R55 (CC PROG F.S.) to:
300mV ±30µV (6033A).
100mV ±100µV (6038A).

Power Limit Calibration

Note:
This procedure requires that CC PROG F. S. (A8R55) be adjusted within specifications. If it is not,
perform Constant Current Full Scale Calibration before proceeding.
a. Connect the power supply to the ac power line through a variable autotransformer which is set to the minimum for your
line voltage (e.g. 104V for nominal 120V line).
b. Turn A2R25 (POWER LIMIT) fully counterclockwise.
c. Connect a electronic load across the output terminals, or use a:
0.25Ω 200W resistor (6033A).
2.3Ω 200W resistor (6038A).
d. Set the electronic load for:
30 amperes (6033A).
10 amperes (6038A).
in the constant Current mode.
e. Turn on power supply and send string:
"VSET 9; ISET 30.5; OUT ON" (6033A).
''VSET 23; ISET 10.2; OUT ON'' (6038A).
f. Adjust A2R25 (POWER LIMIT) clockwise until CV LED on front panel turns on.

Resistance Programming Full Scale Calibration

a. Send string ''OUT OFF".
b. Connect a 2-kilohm calibration resistor from
c. Set rear-panel MODE switches for resistance programming:
P to VP on rear panel.
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