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7102
User's Guide
8-8
Warning:
Do not mix water and oil when exceeding temperatures of 90 °C
Table 4. Nominal Stirrer Motor Settings with Different Liquids
Liquid Stir Motor Setting Temperature
Distilled Water 15 5 °C to 90 °C
(41 °F to 194 °F)
Ethylene Glycol 15 −5 °C to 90 °C
(25 °F to 194 °F)
200.05 Oil 15 −5 °C to 125 °C
( −23 °F to 258 °F)
200.10 Oil 15 25 °C to 125 °C
(77 °F to 258 °F)
8.5 Power
Power to the bath is provided by an AC mains supply and passes through a filter
to prevent switching spikes from being transmitted to other equipment. Refer to
Section 3.1, Specifications, for power details.
To turn on the bath, switch the control panel power switch to the ON position.
The stir motor will turn on, the LED display will begin to show the bath
temperature, and the heater will turn on or off until the bath temperature reaches
the programmed set-point.
When powered on the control panel display will briefly show a four digit number.
This number indicates the number of times power has been applied to the bath.
Also briefly displayed is data which indicates the controller hardware
configuration. This data is used in some circumstances for diagnostic purposes.
8.6 Thermal Electric Devices (TED)
The power to the bath is precisely controlled by the temperature controller to
maintain a constant bath temperature. Power is controlled by periodically
switching the TEDs on for a certain amount of time using power transistors.
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