4.3 Top Panel
Well Bl ock - The well block openings are located on the top of both the cold
and hot sides. These openings are for insertion of interchangeable inserts. The
inserts are designed to accept probes of varying diameters. For insert details see
Section 4.4, Constant Temperature Block Assembly.
Display Hold - One set of Display Hold connectors are available for each
block. These connectors allow externalswitches to be connected and controlled
by the instrument.
4.4 Constant Temperature Block Assembly
The contant temperature block assemblies provide a relativelyconstant and ac-
curate temperature environmentfor sensors to b e calibrated.High-temperature
platinum RTDsimbedded in the block assemblies senses and control the tem-
perature of the blocks. Inserts for use in the constant temperature block assem-
bliesareshowninFigure3.
Warning:The air over the constant temperature block assembly can reach
temperatures greater that 200°C for high temperature (400°C and higher)
dry-wells. Probes and inserts may be hot and should only be inserted and
removed from the instrument when the instrument is set at temperatures
less than 50°C. Use extreme care when removing hot inserts.
Insert “A” has six holes that accept probe diameters of 1/16", 1/8, 3/16, 1/4",
3/8", and 1/2".
Insert “B” has six holes, twoof each that accept probe diameters of 3/16",
1/4", and 3/8".
Insert “C” has six holes (cold) or eight holes (hot) that accept probe diameters
of 1/4".
Insert “D” has six holes, two that accept probe diameter of 3 mm, two that ac-
cept probes of 4 mm diameter, and two thataccept probes of 6 mm diameter.
15
4 Parts and Controls
Top Panel