Table 4-3. Control Module Output Voltage for ppm-CONT.

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Table 4-3. Control Module Output Voltage for ppm

TM-55-1905-223-24-18-2 Landing Craft Utility (LCU) NSN 1905-01-154-1191 Basic Craft Part II Manual

Repair Motorized Oil Pump Assembly

TM 55-1905-223-24-18-2

n. Hold calibration check switch (10) in CHECK position. Observe the reading on the digital display (2)

and observe that this number is the same (within 2 + ppm) as the number recorded on the label (6)

affixed to the interior of the control module.

NOTE

This number, the calibration check number, is used as the standard reference until

the OCA is recalibrated or serviced and a new calibration check number is

established. Although the ppm value of the effluent may vary during normal

system operation, the calibration check remains constant. The calibration check

number is equal to the difference between the digital reading obtained when the

Calibration Check Switch is in the CHECK position and effluent ppm digital read

out.

o. Release the Calibration Check Switch (10) and observe that the Digital Display (2) still reads zero

(00).

p. Close and secure side panel cover (4) of control module (3) with two machine screws (5).

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