ThermoWorks 9150-X HART SCIENTIFIC 9150 THERMOCOUPLE FURNACE - Manual (Page 19)

EXIT – Used to exit from a menu. When EXIT is pressed any changes made to
the displayed value are ignored.
6.3 Constant Temperature Block Assembly
The constant temperature block assembly is shown in Figure 3 and consists of
removable inserts.
6.3.1 Constant Temperature Block
The “Block” is made of aluminum-oxide and provides a relatively constant and
accurate temperature environment for the sensor that is to be calibrated. A
1.25-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 sur-
round the block assembly and provide even heat to the sensor. A Type S ther-
mocouple is used to sense and control the temperature of the block. The entire
assembly is surrounded by a heat reflector to thermally isolate the chassis and
electronics.
6.3.2 Probe Sleeves and Tongs
The calibrator is supplied with a multi-hole aluminum-oxide probe sleeve and
insulator sleeve for insertion into the calibrator well and tongs for removing
sleeves. Probe sleeves of various hole sizes are available to allow the user’s
probe to fit snugly into the well whatever the diameter of the probe.
Insert A and an insulator is provided unless otherwise indicated . The inserts
are:
17
6 Parts and Controls
Constant Temperature Block Assembly
Figure 3 Removable Inserts