ThermoWorks 9141 HART SCIENTIFIC FIELD DRY-WELL TEMPERATURE CALIBRATORS - Manual (Page 21)

Controller Keypad - The four button keypad allows easy setting of the
set-point temperature. The control buttons (SET, DOWN, UP, and EXIT) are
used to set the calibrator temperature set-point, access and set other operating
parameters, and access and set calibration parameters.
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.
DOWN – Used to decrement the displayed value of parameters.
UP – Used to increment the displayed value.
EXIT – Used to exit a function and skip to the next function. Any changes
made to the displayed value are ignored.
5.3 Constant Temperature Block Assembly
Figure 4 on page 17.
5.3.1 Constant Temperature Block
The “Block” is made of aluminum-bronze and provides a relatively constant
and accurate temperature environment for the sensor that is to be calibrated. A
28.6 mm (1.125-inch) diameter well is provided that may be used for sensors of
that size or may be sleeved down with various sized multi-hole probe sleeves.
Heaters surround the block assembly and provide even heat to the sensor. A
high-temperature platinum RTD is imbedded at the base of the block assembly
to sense and control the temperature of the block. The entire assembly is sus-
pended in an air cooled chamber thermally isolated from the chassis and
electronics.
17
5 Parts and Controls
Constant Temperature Block Assembly
Interchangeable Insert Options
1/4"
3/16"
1/8"
1/2"
1/16"
3/8"
Insert “A”
3/8"
3/8"
1/4"
1/4" 3/16"
3/16"
Insert “B”
1/4"
Insert “C”
6 mm
Insert “D”
4 mm
6 mm
3 mm
3 mm
4 mm
Figure 4 Inserts available for the 9141 block assembly