Constant Current Zero Calibration; Current Monitor Full Scale Calibration - HP 6033A series Service Manual

Constant Current Zero Calibration

a. Connect the test setup shown in Figure 2-3.
b. Send string ''VSET 5; ISET 0; OUT ON''.
c. Allow several minutes (3 or more) to ensure thermal settling.
d. Adjust A8R29 (CC PROG ZERO) to:
0V ±1mV (6033A).
0V ±350µV (6038A).

Current Monitor Full Scale Calibration

Note:
This procedure requires that I-MON ZERO (A2R8) be adjusted within specifications. If it is not, perform
the Current Monitor Zero 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 from
d. Take initial reading from DVM.
e. Attach DVM across Rm. Allow several minutes (3 or more) to ensure thermal settling. This can be noted as a stable
reading on the DVM.
f. Adjust A2R9 (I-MON F.S.) to:
0.060 x initial reading ±0.4mV (6033A).
0.200 x initial reading ±1.0mV (6038A).
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Figure 2-3. CC Zero Calibration Setup
M to IM on the rear panel. Use six-digit display on HP 3458A DVM.