fann 210194, Manual

Page: 33 / 56

Stirring Fluid Loss Manual
100031980 Revision F 33
10. Check parts thoroughly for wear and erosion.
11. Reassemble parts in reverse order of disassembly.
7.3 Temperature Controller and Heating Jacket
Use this procedure to test the temperature controller and heating jacket.
1. Connect a water supply of at least 40 psi to the test unit.
2. Release the heating jacket lock and rotate the sample chamber to verify the
pressure lines are not binding.
3. Connect the coolant lines to the heating jacket. Rotate the coolant valve to flow
water through the heating jacket. Check for leaks at all fittings. Rotate the
coolant
valve to Off position (up).
4. Set the temperature controller set point to 150
o
F (65.5
o
C). Do NOT turn on the
heater switch. Feel the outside of the heating jacket for an increase in
temperature. It should remain cold.
5. Turn the heater s witch to On .
6. Observe the rate of temperature increase on the controller present value (PV)
display.
7. Set the temperature controller set point to 250
o
F (121
o
C).
Do NOT allow the heating jacket to rise above 200
o
F (93
o
C).
8. Observe the rate of temperature increase on the controller present value (PV)
display.
9. Feel the heating jacket and note a steady temperature increase.
10. When the present value (PV) reaches 175
o
F (79
o
C), set the temperature
controller to Off
11. Slowly rotate the coolant valve to flow water through the heating jacket until
the present value (PV) is below 100
o
F (38
o
C). Then rotate the coolant valve to
the closed position (up).