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Orion 796 Iss.08 – 01/14
USING THE CONTROLLER
FRONT PANEL LAYOUT
The Temperature Controller
The controller has a dual display, the upper display indicates the nominal block temperature, and the lower display
indicates the desired temperature or setpoint.
Altering the Setpoint
To change the setpoint of the controller simply use the UP and DOWN keys to raise and lower the setpoint to the
required value. The lower display changes to indicate the new setpoint.
ADVANCED CONTROLLER FEATURES
Setpoint Ramp Rate
By default the bath is configured to heat (and cool) as quickly as possible. There may be some calibration
applications where it is advantageous to limit the heating (or cooling rate).
An example might be when testing bimetallic thermostats; by forcing the bath to heat at a controlled rate it is
easier to determine the temperature at which the thermostat changes state.
The bath can have its heating rate limited with the Setpoint Ramp Rate feature. This feature is accessed from the
Scroll key. Depress the key until the display shows,
OFF
SP.RAT
The upper display will show the current value and is adjustable from OFF to 999.9. The units are °C/min and are
adjustable via the UP/DOWN keys.
When the SP.RAT is active the lower setpoint display will now automatically update with the current value, known
as the working setpoint. The setpoint can be seen by pressing either the UP and DOWN key.
The Setpoint ramp rate operates when the bath is heating and cooling.
