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9.13 Temperature measurement
Install the HERMetic equipment as per 9.9
"Installation of the instrument".
Open the valve by turning the handle.
Switch on the unit: a control beep is audible
every 2 seconds.
Put the tape cleaner on the "DOWN" position.
Disengage the knob of the crank handle and
lower the sensing probe to the deepest
reading desired. Make sure that the tape does
not rub on any sharp edge when lowering; its
insulation might be damaged.
The position of temperature sensor coincides
with zero of tape, so the tape index reading
shows directly level at which temperature is
measured
When the desired temperature ullage level is
reached,
joggle
approximately 300 mm (1 foot) above and
below the desired measurement level until the
displayed temperature reading settles. For
heavy crude oils which have a low thermal
conductivity and a viscous nature, the joggling
procedure is a necessity to assure an accurate
temperature reading in a minimum amount of
time.
When temperature has settled, record it.
Engage the tape cleaner on "UP" position.
Raise the probe to the next ullage level to be
measured and repeat the procedure a.m. To
joggle the sensing probe the tape cleaner must
be on the "DOWN" position.
When the measurements are completed,
switch off the unit, engage the tape cleaner on
"UP" position and wind up the tape until the
sensing probe is in the storage tube. The
reading on the tape shall be less than 420 mm
or 1 ft 5 inch.
Close the valve and disconnect the instrument
from the nipple.
Put the end cap back on the valve.
50461/GTEX MMC/1111
the
sensing
probe
IMPORTANT NOTE
As mentionned in 9.6 "Muting the buzzer" it is
easy to mute the buzzer during the temperature
measurement by pressing on "-".
Recall that after 5 minutes have elapsed or each
time the probe detects a change of the medium
(air, liquid, water), the buzzer will reactivate
automatically. To keep it muting, press on "-"
again.
34
UTImeter Gtex MMC
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