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3. To engage the drive bar of the slurry cup into the potentiometer, rotate the
cup with the motor for a few seconds while applying slight pressure to the
potentiometer. Note that if the unit is in an alarm condition the motor will
not engage.
4. Choose an o-ring for the cell cap and place it into the test cell in the o-ring
groove. Place the cell cap onto the cell and hand tighten.
Two o-rings are available for the cell cap. The rubber o-ring is easier to
use, but is not suitable for tests involving high temperature or pressure.
The metal o-ring is more durable, but requires extra attention when
tightening the cell cap.
If you are using a metal o-ring for your test, be very careful when you
tighten the cell cap. Tightening the cell cap flattens the o-ring. If you
tighten the cell cap to a certain point for one test, but do not tighten it
as much for the next test, the seal will leak and the test will not provide
accurate results. Once you have tightened the cell cap, mark the test cell
and cell cap so that you know how much to tighten it for the next test. It is
recommended that you hand-tighten the cell until it is close to the mark,
then use a rubber mallet to gently tap the cell cap into position. This will
ensure that you do not accidentally over-tighten.
If you tighten the cell cap past the marked position, you must make
a new mark and refer to it for the next test.
The o-ring (either metal or rubber) must be replaced after any test
above 500°F (260°C).
5. Plug the thermocouple into the port on the side of the unit. Insert the
thermocouple into the hole in the top of the cell cap and tighten the thread
gland finger tight. Then loosen it ⅛ of a turn.
6. Turn on the air supply.
7.
With a ⅝" wrench handy, turn the “Oil Reservoir Valve” to “Fill Cell”.
The test cell will begin to fill with mineral oil from the reservoir below.
Carefully watch the top of the test cell. When oil begins leaking out of the
thermocouple hole, tighten the thread gland with the wrench. This will
ensure that no air remains within the test cell.
8. Turn on the “Motor” and “15 VDC” switches. Switch the “Slurry/Test Cell”
switch to “Slurry”.
This switch determines which temperature the temperature controller will
display. If the switch is set to “Slurry”, it will show the temperature of the
cement slurry via the thermocouple in the cell cap. If it is set to “Test Cell”,
it will show the temperature of the test cell body, via the thermocouple
inside the cabinet.