Fluke 9140 Dry-well Calibrator - Manual (Page 21)

EXIT – Used to exit a function and to skip to the next function. Any changes
made to the displayed value are ignored.
5.3 Constant Temperature Block Assembly
Figure 3 on page 15.
5.3.1 Constant Temperature Block
The “Block” is made of aluminum and provides a relatively constant and accu-
rate temperature environment in which the sensor that is to be calibrated is in-
serted. 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 surround the block assembly and provides 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.
CAUTION: The block vent cover may be very hot due to the fan blowing
upward. Please use caution.
5.3.2 Probe Sleeves and Tongs
The calibrator is supplied with a multi-hole aluminum probe sleeve for inser-
tion 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.
One insert, whichever is ordered, is shipped with the unit:
• Insert A (variety block): 1/2”, 3/8”,3/16”,1/8”, and 1/16” holes
• Insert B (comparison block): 2 3/8”,2 1/4”, and 2 3/16” holes
• Insert C (1/4” comparison block): 6 1/4” holes
or
15
5 Parts and Controls
Constant Temperature Block Assembly
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 3 Inserts available for the 9140 block assembly