Agilent Technologies 4294A Service Manual download pdf (Page 28)

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Performance Test

Introduction

This section provides the test procedures used to verify that the 4294A’s specifications are

met. The performance tests can also be used for incoming inspection, and for verification

after troubleshooting or adjustment. If the performance tests indicate that the 4294A is

NOT operating within the specified limits, check your test setup, then proceed with

troubleshooting if necessary.

Warm Up Time

Allow the 4294A to warm up for at least 30 minutes before you execute any of the

performance tests

Ambient Conditions

Perform all performance tests in ambient conditions of 23 °C ± 5 °C, ≤ 70% RH.

Performance Test Interval

The performance test should be performed periodically. The recommended test interval is

12 months.

NOTE The test interval depends on maintenance of use and the environmental conditions under

which the instrument is used. You may find that the test interval could be shortened or

lengthened; however, such a decision should be based on substantial quantitative data.

Performance Test Record and Calculation Sheet

Performance test record lists all test points, acceptable test limits, test result entry columns,

and measurement uncertainties. The listed measurement uncertainties are valid only when

the recommended test equipment is used.

The calculation sheet is used as an aid for recording raw measurement data, and for

calculating the performance test results.

The procedure for using the calculation sheet and performance test record is;

1. Photo copy the calculation sheet.

2. Follow the performance test procedure and record the measurement values, the

4294A’s reading, etc., into the specified column on the calculation sheet.

3. Calculate the test result using the appropriate equation given on the calculation sheet,

and record the test result into the Test Result column of the performance test record.

Test Equipment

Table 1-1 lists the recommended equipment for performing maintenance on the 4294A.

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Agilent Technologies 4294A Service Manual Page 28