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19-2 Calibration

Introduction

Use the procedures in this section to calibrate both the Model 6430 mainframe and the

Remote PreAmp. These procedures require accurate test equipment to measure precise DC

voltages and currents.

NOTE Mainframe and Remote PreAmp calibration are performed separately. The main-

frame must be calibrated before the Remote PreAmp.

WARNING This information in this section is intended for qualiﬁed service personnel

only. Do not attempt these procedures unless you are qualiﬁed to do so.

Some of these procedures may expose you to hazardous voltages.

The Remote PreAmp connectors carry hazardous voltage. To prevent risk

of electric shock, connectors must be fully mated or safety covers must be

placed over the open connectors. Proper installation requires that the oper-

ator is protected from exposed voltages by insulation or barriers.

Environmental conditions

Temperature and relative humidity

Conduct the calibration procedures at an ambient temperature of 18-28°C (65-82°F) with

relative humidity of less than 60% unless otherwise noted.

Warm-up period

Allow the Model 6430 to warm up for at least one hour before performing calibration.

If the instrument has been subjected to temperature extremes (those outside the ranges stated

above), allow additional time for the instrument’s internal temperature to stabilize. Typically,

allow one extra hour to stabilize a unit that is 10°C (18°F) outside the speciﬁed temperature

range.

Also, allow the test equipment to warm up for the minimum time speciﬁed by the

manufacturer.

Line power

The Model 6430 requires a line voltage of 100 to 240V at line frequency of 50 or 60Hz. The

instrument must be calibrated while operating from a line voltage within this range.

Keithley 6430 User Manual

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