5.3 TEMPERATURE MEASUREMENT PROCEDURE
5.3.1 If power is off, turn unit on by depressing “Off/On” push-button switch.
Unit comes on in Ullage/Interface mode. Depress “Mode” push-button switch to
select temperature.
5.3.2 If unit was on and in Ullage/Interface mode, simply press the “Mode”
push-button to select temperature.
5.3.3 Make sure “LO BAT” does not show at left upper corner of display. If
“LO BAT” appears, replace battery even though the digital display turns on. The
display may continue to operate even though the battery voltage is below normal.
Temperature reading however, may be in error.
5.3.4 Ground the assembly, release the turn handle reel lock. Lower the sensing
sensor to the deepest reading desired. Make sure to exert restraining force while
lowering.
5.3.5 When the desired temperature ullage level is reached, allow the sensor to
at this point for at least two (2) minutes. Then joggle the sensing sensor up and
down, approximately 6” above and below the desired measurement level until the
displayed temperature reading settles. Record this reading. For heavy crude oil
products, the joggling procedure is a necessity to insure accurate readings. The
viscous nature and low thermal conductivity properties of these petroleum products,
makes the joggling procedure a necessity to insure accurate temperature in a
minimum amount of time.
5.3.6 Raise the sensor to the next ullage level to be measured. Repeat step 6.3.5.
Continue raising sensor to all levels at which readings are desired.
5.3.7 When the measurements are complete, push “Off/On” button to turn off
and conserve battery power. Rewind the tape into the carriage reel assembly. Wipe
the tape as it is rewound by placing the spring loaded wiper in the “On” position.
5.3.8 Lock the reel by rotation reel lock crank down, position. Follow the
same final procedure as described in step 5.2.13 above.
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