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If a contact is to be controlled by several functions, the same procedure applies for each func-
tion, without forgetting the combining operator OR or AND. To input a pickup or dropout time
delay (contact #4 or #8 only), press ENTER with the cursor positioned on the appropriate time
delay. Press ENTER again to accept the desired time delay.
4.11 ROUTINE VISUAL INSPECTION
With the exception of Routine Visual Inspection, the REL300 relay assembly should be main-
tenance-free for one year. A program of Routine Visual Inspection should include:
• Condition of cabinet or other housing
• Tightness of mounting hardware and fuses
• Proper seating of plug-in relays and subassemblies
• Condition of external wiring
• Appearance of printed circuit boards and components
• Signs of overheating in equipment
4.12 ACCEPTANCE TESTING
The customer should perform the REL300 Performance Tests (see Appendix A) on receipt of
shipment.
4.13 NORMAL PRECAUTIONS
Troubleshooting is not recommended due to the sophistication of the Microprocessor unit.
With the exception of checking to insure proper mating of connectors,
or setting jumpers, the following procedures are normally not recom-
mended. (If there is a problem with the REL300, it should be returned to
the factory. See PREFACE.)
4.14 DISASSEMBLY PROCEDURES
a. Remove the inner chassis from the outer chassis, by unscrewing the center lockscrew (on
the front panel), and unsnapping the two covers from the (optional) FT-14 switches, if the
FT-14 switches are a part of the REL300 system.
NOTE:
The inner-chassis (sub-assembly) slides in and out of the outer chassis from the front.
Mating connectors inside the case eliminate the need to disconnect external wiring
when the inner chassis is removed.
b. Remove the (optional) FT-14 switches, mounted by two screws on the side walls.
!
CAUTION
I.L. 40-385.7
4-11
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