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 TM 55-1905-220-14-9
4-66.1. TANK LEVEL INDICATION - RECEIVER - MAINTENANCE INSTRUCTIONS (Continued).
LOCATION
ITEM
ACTION
REMARKS
ADJUSTMENTS AND ALIGNMENTS (Cont)
d.
Alarm Adjustments.
(1)
General. Following the calibration of the meters of the receiver modules and receiver panels during
installation or corrective maintenance procedures and whenever a 'repair is made to an alarm circuit in a
receiver module or receiver panel control module, the TLI system is adjusted to establish the levels of
operation of high-and low-level alarms. The procedure for the adjustment of high- and low-level alarm operation
is determined by whether the receiver being adjusted is a receiver module or a receiver panel. Procedures for
each adjustment type follow. In both procedural types, it is assumed that the indication level at which alarms
are to be operated have been determined and marked or recorded during the calibration of the meter.
(2)
Receiver Module Adjustment. To perform the installation (alarm) adjustments for reciver modules,
proceed as follows:
(a)
Place the ON-OFF-FULL REF switch on the front panel of the receiver being calibrated in the ON
position.
(b)
Place the NORMAL-SIMULATE switch on the side of the receiver module in the SIMULATE
position.
(c) Adjust the FLOAT SIMULATOR control to bring meter deflection to the desired low-level alarm
setting marked on the meter face.
NOTE
If a low-level alarm occurs in a tank in which a level link is used,
adjust the FLOAT SIMULATOR control to bring meter deflection
to a point slightly (3/16 to 1/4 inch) below the alarm setting
marked on the meter.
(d) Adjust the LOW ALARM control until the alarm just begins sounding at the alarm box, alarm bell, or
other alarm indicating device.
(e) Adjust the FLOAT SIMULATOR control to bring meter deflection to the desired high-level alarm
setting marked on the meter face.
4-1420
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