High--Resolution Thermometer; The Use Of A Thermometer With Wetting Expansion Liquid - Thermo Scientific HAAKE Instruction Manual

Spare Parts
13.3 High- -resolution thermometer
Control thermometers:
222--2322 --35 to 1 C, scaling 0.2 C, accuracy 0.2 C
222--2323 --1 to 26 C, scaling 0.1 C, accuracy 0.1 C
222--2324 24 to 51 C, scaling 0.1 C, accuracy 0.1 C
222--2325 49 to 76 C, scaling 0.1 C, accuracy 0.1 C
222--2326 74 to 101 C, scaling 0.1 C, accuracy 0.1 C
222--2327 50 to 150 C, scaling 0.5 C, accuracy 0.5 C
*Delivery with control thermometer from June 2017;
Delivery with mercury thermometer up to the end of May 2017,
please refer to the instruction manual with version 2.2.
13.3.1 The use of a thermometer with wetting expansion
liquid
This thermometer, which you purchased, is a measuring
device of high quality. Since it works with an expansion
liquid which wets glass, there have to be observed the fol-
lowing operating instructions in order to avoid wrong mea-
surement results.
a. A thermometer with a range not exceeding 115
1
should be warmed carefully till the thermometer fil-
ling enters into the safety chamber at the upper end
of the capillary tube and fills it to about a third.
During this procedure also possible separated liquid
parts are rejoined with the liquid column.
b. An instrument with a range above 115
1
med carefully till the highest temperature of the
range is achieved (possibly separated liquid parts
are rejoined before by strong swinging).
Afterwards let the thermometer cool down very
2
slowly to achieve the wetting liquid flows down as
completely as possible. For most exact temperature
determinations the speed of the cooling should be
about 1
which shall be measured.
After the cooling process measurement can be car-
3
ried out. Should be worked afterwards at higher tem-
C per minute down to the temperature at

24
C

C is war-
