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  TM 11-6625-3056-12
4-5
. PORTABLE INSTALLATIONS
The TS-3981 can be used as a portable test set inside a shelter:
1.
Ground
·
On rear panel, press in cap on ground lug to expose internal slot.
Connection
·
Place heavy-gage ground wire (not supplied) in slot and release pressure on cap.
·
Connect the other end to suitable ground. In the shelter this ground can be an equipment
rack. Outside the shelter this ground can be a ground rod.
2.
Power
·
Connect power cable to a 115-volt power source.
Connection
4-6.
MONTHLY PREVENTIVE MAINTENANCE
Introduction
Item No: Order in which check or service is performed. The number in this column shall also be
used as a source of item numbers for the TM Number Column on DA Form 2404, Equipment
Inspection and Maintenance Worksheet, when recording results of PMCs.
Item To Be Inspected: The portion of the TS-3981 to which the check or service applies.
Procedure: Procedure to be followed for the check or service.
Equipment
a. Cleaning compound, trichlorotrifluoroethane.
Required
b. Cheesecloth.
c.
Banana patch cords (2 ea), 6 in. minimum length patch cords terminated in banana plugs.
Field wire may be substituted.
Trouble-
Items 4 thru 10 (end) are also troubleshooting procedures.
shooting
Each item serves as a foundation for the next. Therefore,
Procedure
items 4 thru 10 must be performed in the order given. If
t
hey are not, the probable cause information is invalid.
Item
Item To Be
Procedure
No.
Inspected
1.
MWO
·
Compare the Modification Work Order in DA PAM 310-1 for the TS-3981, if any, to that on the
TS-3981.
If latest modification(s) has (have) not been installed:
Perform or request the modification.
4-2
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