147
B

Verification and Calibration

Introduction
This appendix includes verification and calibration procedures for the Agilent 66111A Fast Transient DC
Source, and the Agilent 66311B/D, 66309B/D Mobile Communications DC Sources. 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 re-calibrated.

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 Multimeter Resolution: 10 nV @ 1 V
Readout: 8.5 digits
Accuracy: >20 ppm
Agilent 3458A
Current Monitor115 A (0.1 ), ±0.04%, TC=5ppm/°CGuildline 9230/15
Load Resistor
(3 W min. TC=20ppm/°C) 400 (verification.)
800 (calibration) p/n 0811-0942
p/n 0811-0600
Power Supply 8 V @ 5 A (for current sink verification/calibration)
25 V source (for DVM verification/calibration) Agilent 6611C or Agilent
6631B
Agilent 6631C or Agilent
6633B
GPIB Controller Full GPIB capabilities (only required if you are
calibrating the unit over the GPIB) HP Series 200/300 or
equivalent
1The 4- terminal current shunt is used to eliminate output current measurement error caused by voltage drop s 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).