Spare Parts
24
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.
1
a. A thermometer with a range not exceeding 115
C
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.
1
b. An instrument with a range above 115
C is war-
med carefully till the highest temperature of the
range is achieved (possibly separated liquid parts
are rejoined before by strong swinging).
2
Afterwards let the thermometer cool down very
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
C per minute down to the temperature at
which shall be measured.
3
After the cooling process measurement can be car-
ried out. Should be worked afterwards at higher tem-
