Grant Instruments TXF200 R - Manual (Page 12)

4. Specific examples
ON OFF
4.1 Example 1 - To control the liquid at 10°C, using a GD100 and R1
S set point
S
4.2 Example 2 - A four phase operation using a GP200 thermostat with either of
the following units (R2/R2L, R3/R3L, R4/R4L, R5)
This section provides the user with specific examples of how the unit may be used to
achieve certain requirements.
The refrigeration should not be switched (either or ) more than once during any
five minute period.
Any combination of Refrigeration unit and Thermostat can control a liquid at
10°C. As the refrigeration unit does not need to be switched on or off, the
communications lead is not required.
As we are controlling at 10°C water can be used.
Fill the bath with 4 litres of water.
Using the IEC mains link, connect the Thermostat to the refrigeration unit.
Connect the refrigeration unit to the mains power with the IEC cord. Switch
refrigeration unit ON and switch the thermostat ON.
To set the temperature to 10°C press so that temperature is
flashing. Rotate the knob so that the required temperature is displayed. Press
again to set this temperature.
Phase 1 Reduce the temperature to -20°C in 40 minutes.
Phase 2 Keep the temperature at -20°C for 1 hour.
Phase 3 Increase the temperature to 40°C in 40 minutes.
Phase 4 Keep the temperature at 40°C for 20 minutes.
WARNING Before proceeding with a worked example please ensure you have read and
understood the rest of this instruction manual.
Equipment:
Liquid:
4.1.1 Procedure:
Requirement:
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Page 12
Low temperature bath/circulator
Operating instructions
Version 4 - Jan 2010