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8024B
4-18.
Clean the front panel and case with a mild solution of detergent and water. Clean
dust from the circuit board with low pressure (<20 psi) dry air. Contaminants can be
removed from the circuit board with demineralized water and a soft brush (remove the
Display Assembly before washing, and avoid getting excessive amounts of water on the
switches). Dry with clean, dry air at low pressure, and then bake at 50 to 60°C (124 -
140°F) for 24 hours.
4-19,
Battery/Backup Fuse Replacement
WARNING
BATTERY/FUSE REPLACEMENT SHOULD ONLY BE PERFORMED AFTER
THE TEST LEADS HAVE BEEN REMOVED FROM THE INPUT JACKS, AND
THE POWER
SWITCH
IS SET TO OFF. BACKUP
FUSE REPLACEMENT
PROCEDURE TO BE PERFORMED BY QUALIFIED SERVICE PERSONNEL
ONLY. USE ONLY THE RECOMMENDED
REPLACEMENT TYPE.
1.
Complete the "Backup Fuse and Calibration Access Procedure" located earlier
in this section.
2.
Using a pointed tool such as a probe tip, pry the backup fuse from its holder.
3.
Replace the defective backup fuse with a 3A, 600V type BBS-3 only.
4-21.
PERFORMANCE
TEST
4-22.
The performance tests are used to compare the 8024B performance with the list of
specifications given in Section
| of this manual.
It is recommended
for incoming
inspection, periodic maintenance, and to verify specifications. If the instrument fails any
test, calibration adjustment and/or repair is indicated. The 8024B being tested will be
referred to as the UUT (Unit Under Test).
4-23.
Initial Procedure
4-24,
Each of the performance tests assume that the following conditions exist:
1.
The unit has been allowed to stabilize and will be tested at an ambient
temperature of 23 £5°C (73 + 9°F).
2.
The fuse and battery have been checked and, if necessary, replaced.
3.
Set the UUT switches to the following positions:
POWER
ON
PEAK
HOLD
OFF
All other switches
out
4-6
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