9100A/9200A/9400
Maintenance and Performance Checks 3-2
Environmental
Conditions
Tests should be performed under laboratory conditions having an
ambient temperature of 25
°
C,
±
5
°
C and at relative humidity of less
than 80%. If the instrument has been subjected to conditions outside
these ranges, allow at least one additional hour for the instrument to
stabilize before beginning the adjustment procedure.
Warm-up Period
Most equipment is subject to a small amount of drift when it is first
turned on. To ensure accuracy, turn on the power to the 9400 and
allow it to warm-up for at least 30 minutes before beginning the
performance test procedure.
Initial Instrument
Setting
To avoid confusion as to which initial setting is to be used for each
test, it is required that the high voltage be turned off prior to each test.
To turn the high voltage off, hit on the top of the latch and observe that
the High Voltage On light turns off.
Recommended
Test Equipment
Recommended test equipment for troubleshooting, calibration and
performance checking is listed in Table 3-1 below. Test instruments
other than those listed may be used only if their specifications equal or
exceed the required characteristics.
Table
3-1, Recommended Test Equipment
Equipment
Model No.
Manufacturer
Oscilloscope LT342
LeCroy
Distortion Analyzer
6900B
Krohn Hite
Digital Multimeter
2000
Keithley
Waveform Generator
WW2572
Tabor Electronics
100:1 High voltage Probe
6498
Pomona Electronics
4 k
Ω
/20W Load Resistance
Tabor
Electronics
Test Procedures
Use the following procedures to check the Model 9400 against the
specifications. A complete set of specifications is listed in Appendix A.
The following paragraphs show how to set up the instrument for the
test, what the specifications for the tested function are, and what
acceptable limits for the test are. If the instrument fails to perform
within the specified limits, the instrument must be calibrated or tested
to find the source of the problem.
