B - Verification and Calibration

Table B-1. Equipment Required

Equipment

Digital Voltmeter

Current Monitor1

Ratio Transformer2

Load Resistor

Impedance Resistor

GPIB Controller

Characteristics

Resolution: 10 nV @ 1 V

Readout: 8.5 digits

Accuracy: >20 ppm

0.01 Ω, ±200 ppm, 10 Watts

30:1 ratio, 50 ppm, 45 Hz to 1 kHz

20 Ω, 10 A, 1800 Watts min.

1Ω, 100 Watts min.

Full GPIB capabilities

Recommended Model

Agilent 3458A

Guildline 7320/0.01

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 current-monitoring terminals inside the load connection terminals. Connect the voltmeter directly to these current-monitoring terminals.

2A ratio transformer is required only when verifying output voltage readback to MIL-STD-45662A 4:1 test equipment ratio requirements.

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 2).

Agilent 3458A

DMM

Rs

R L

S1

Agilent 6811B/6812B/6813B

 

SENSE

 

01

01 COM

COM

Agilent 3458A

30

1

DMM

 

RL = Load resistor for CC test (20 ohms)

RZ

Rs = Current Monitor resistor ( 0.01 ohms )

 

Rz = Impedance resistor ( 1 ohm )

 

S1 = Switch is for convenience (not required).

 

Figure B-1. Verification & Calibration Test Setup

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Agilent Technologies 6813B, 6811B, 6812B manual Test Setup, Table B-1. Equipment Required, Recommended Model

6812B, 6811B, 6813B specifications

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