AR 2000 Operator's Manual
74
3. Connect the GAS /
LIQUID outlet port on
the CCU to the Coolant
Inlet port on the Upper
Heated Plate using the
4-mm outer diameter
tubing (blue) and the 4-
mm to 6-mm adaptor
provided.
4. Connect the Coolant
Outlet port on the Upper
Heated Plate to drain, if
mains water is the
supply, or to return, if a
fluid circulator is used.
Use the 4-mm outer
diameter tubing (blue)
for this port. A 4-mm to
6-mm adaptor and 6-mm "Y" piece are provided for the connection to the fluid circulator.
5. Connect the EVENT socket on the CCU to the EVENT B socket on the rear of the AR 2000 Rheometer, using
the cable provided.
6. Set the purge air flow rate to 1 Liter per minute (L/min). Note that the reading is taken from the center of the
float. To set the flow rate, it may be necessary to raise the temperature of the Upper Heated Plate using
Rheology Advantage™ software, to ensure continuous air flow.
Using Circulating Fluids Other Than Water
For low temperatures, circulating fluids other than water must be used. These should be fluids of the silicone
type, as recommended by the supplier of the fluid circulator. A separate kit is available for use with these fluids.
WARNING: Flammable fluids such as ethanol or mineral oils should NOT be used with
the Upper Heated Plate. Circulating fluids should NOT be used outside the ranges
given by the supplier.
ATTENTION: Des fluides inflammables tels que l’éthanol ou les huiles minérales ne
devraient pas être employés avec l’Upper Heated Plate. Des fluides de circulation ne
devraient pas être employés en dehors des gammes données par le fournisseur.
Silicone fluids are usually higher in viscosity than water, and the required flow rates cannot be achieved with
the standard CCU described above. The special low temperature kit should replace this. As when water is used
as the circulating fluid, it is suggested that separate sources should be used for the cooling fluid supplied to the
Peltier plate and the Upper Heated Plate. Then water may be used for the Peltier, and a silicone fluid for the
Upper Heated Plate, for example. However, the same supply may be used for both units, provided that sufficient
pressure is available to ensure adequate flow through both. Note that if a single supply is used, the Peltier and
Upper Heated Plate should always be connected in parallel, never in series.
Figure 7.13
Coolant and Inert Gas Connections for the UHP
Coolant Inlet Port
Inert Gas Port
Coolant Outlet Port
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