B
Verification and Calibration
Introduction
This appendix includes verification and calibration procedures for the HP 66332A and HP 6631B/6632B/6633B/6634B dc source. Instructions are given for performing the procedures either from the front panel or from a controller over the
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 | HP 3458A |
| Readout: 8.5 digits |
|
| Accuracy: >20 ppm |
|
Current Monitor1 | 15 A (0.1 Ω ), ±0.04%, TC=5ppm/°C | Guildline 9230/15 |
Load Resistor | 400Ω (HP 6631B calibration, used for |
|
(3 W min. TC=20ppm/°C) | verification of all models) | HP p/n |
| 1.1 kΩ (HP 6632B/66332A calibration) |
|
| 2.5 kΩ (HP 6633B calibration) |
|
| 5 kΩ (HP 6634B calibration) |
|
Power Supply | 8 V @ 10 A | HP 6631B |
Full | HP Series 200/300 or | |
|
| equivalent |
1The 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
Test Setup
Figure
53