TM5-3820-256-10
Section V.
MAINTENANCE PROCEDURES
3-31.
Preventive Maintenance. Perform preventive maintenance checks and services as described in Chapter 2.
3-32.
Corrective Maintenance. Report all corrective maintenance requirements to your supervisor. Corrective
maintenance should be performed by organizational maintenance or a higher level maintenance activity as authorized by
the Maintenance Allocation Chart (MAC).
3-33.
Maintenance of Logging Equipment.
a. Introduction. It is very important that you keep all plugs and panel connections clean and dry. Moisture on
connections can cause current leakage and result in improper equipment operation, and therefore, inaccurate
formation readings. Also, keep the cable and reel case clean; as you remove the cable from the hole, wipe it
clean before its wound onto the reel case. Do not allow water or mud to accumulate in the reel case.
b. Maintaining the Resistively Instrument.
(1)
Keep the unit clean and replace the batteries when testing indicates the batteries are weak. Access the
battery box by lifting the front panel of the instrument. (See figure 2-42).
(2)
While operating the unit, take care that the Ohmmeter and Self-Potential Potentiometer indicators do not
slam against their zero stops. When the adjust knobs are turned all the way counterclockwise, the
indicators should be exactly at zero. If they are not, use the small hex wrench (provided with unit) to loosen
the two set screws on the knob (located 90 degrees apart) and reset the knob to zero.
c. Maintaining the Cable and Reel. When handling the cable, take care you do not damage the insulation. Always
wipe the cable clean before storing.
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