SECTION VI
6.0
CARE AND MAINTENANCE:
Proper care and maintenance should be practiced to maintain long, trouble free and accurate
service and to maximize battery life, as follows:
6.0.1 When not in use, make sure power is off as evidenced by display being extinguished.
6.0.2 Store sensor head assembly in the fully wound position and store in a dry location. Do
not allow the instrument to remain for long periods in direct sunlight, or store in
temperature above 125
°
F, or in temperature below freezing. Such temperatures may
damage the liquid crystal display.
6.0.3 Make sure before lowering the sensor into a tank, that the tank product level is known, so
that the sensor is not immersed int the product. Before lowering the oxygen sensor,
always obtain an accurate ullage reading by using an MMC ullaging tape or similar
device. (See Section 5.0).
6.0.4 Each time the sensor is raised from the tank, place the spring-loaded tape wiper switch in
the “ON” position, to clean gauging tape of product smears.
6.0.5 Lubricate drum shaft and bearing with light machine oil to keep it free turning.
6.0.6 Never permit tape and sensor head to unwind freely (control speed of descent by use of a
restraining force on tape reel crank).
6.1
BATTERY REPLACEMENT
(In Safe Area Only!)
The battery should be replaced whenever the “LO BAT” symbol appears at the upper left corner
of the display. If the sensor is used to obtain oxygen level readings when the battery is low, large
errors may result.
Before replacing battery, turn power off by depressing “ON/OFF” switch. Always replace
battery in a gas free atmosphere. Remove the six machine screws from the outside retaining ring
on the hub cover. Lift the bezel faceplate cover with its attached P.C. Board. The battery is
retained within the reel by a spring clip battery holder under the modular faceplate assembly.
Remove the battery from the battery cap connector. Replace the battery with a fresh battery of
the type listed on the approval label only. Make sure the battery is inserted with correct polarity.
Positive (+) side of battery to positive (red) side of battery cap. Take care to align the viton cover
casket, and machine screw fasteners when re-assembling to tape reel hub.
IMPORTANT!
After battery is replaced, it is necessary to re-calibrate the oxygen sensor using the simple push
button procedure given in Section 7.0.
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