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15
Parts and Controls
Constant Temperature Block Assembly
4.3 Front Panel
Well Block - Located on the right side of the front panel is the well opening where
a block (Figure ) designed to accept different probe sizes is installed. Each block is
designed to accept different diameter temperature sensors. Four different blocks are
available. See Section , Constant Temperature Block Assembly for details.
Controller Display - The digital display is an important part of the temperature
controller because it not only displays set and actual temperatures but also various
calibrator functions, settings, and constants. The display shows temperatures in units
according to the selected scale °C or °F.
Controller Keypad - The four button keypad allows easy setting of the set-point
temperature. The control buttons (SET, d, u, and EXIT) are used to set the
calibrator temperature set-point, access and set other operating parameters, and access
and set calibration parameters.
Figure 3 Front panel
Setting the control temperature is done directly in degrees of the current scale. It can
be set to one-tenth of a degree Celsius or Fahrenheit.
The functions of the buttons are as follows:
SET – Used to display the next parameter in the menu and to store parameters to the
displayed value.
d (down arrow) – Used to decrement the displayed value of parameters.
u (up arrow) – Used to increment the displayed value.
EXIT – Used to exit a function and to skip to the next function. Any changes made to
the displayed value are ignored.
4.4 Constant Temperature Block Assembly
The “Block” is made of aluminum and provides a relatively constant and accurate
temperature environment in which the sensor that is to be calibrated is inserted. A
high-temperature platinum RTD imbedded in the block assembly senses and controls
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