53
B
Verification and Calibration
Introduction
This appendix includes verification and calibration procedures for the Agilent 66332A and Agilent
6631B/6632B/6633B/6634B dc source. Instructions are given for performing the procedures either from
the front panel or from a controller over the GPIB.
The verification procedures do not check all the operating parameters, but verify that the dc source is
performing properly. Performance Tests, which check all the specifications of the dc source, are given in
the applicable dc source Service Manual.
Important Perform the verification procedures before calibrating your dc source. If the dc source
passes the verification procedures, the unit is operating within its calibration limits and
does not need to be recalibrated.
Equipment Required
The equipment listed in the following table, or the equivalent to this equipment, is required for
verification and calibration.
Table B-1. Equipment Required
Equipment Characteristics Recommended Model
Digital Voltmeter
Resolution: 10 nV @ 1 V
Readout: 8.5 digits
Accuracy: >20 ppm
Agilent 3458A
Current Monitor
1
15 A (0.1
Ω
),
±
0.04%, TC=5ppm/
°
C
Guildline 9230/15
Load Resistor
(3 W min. TC=20ppm/°C)
400
Ω
(Agilent 6631B calibration, used for
verification of all models)
1.1 k
Ω
(Agilent 6632B/66332A calibration)
2.5 k
Ω
(Agilent 6633B calibration)
5 k
Ω
(Agilent 6634B calibration)
p/n 0811-2878
Power Supply 8 V @ 10 A Agilent 6631B
GPIB Controller
Full GPIB capabilities HP Series 200/300 or
equivalent
1
The 4- terminal current shunt is used to eliminate output current measurement error caused by voltage drops in the
load leads and connections. It has special current-monitoring terminals inside the load connection terminals. Connect
the voltmeter directly to these current-monitoring terminals.
Test Setup
Figure B-1 shows the setup for the tests. Be certain to use load leads of sufficient wire gauge to carry the
full output current (see chapter 3).
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