2/2
H21017a
BIMETAL THERMOMETERS
TYPE: TMT501, TMT502
4 CALIBRATION AND CHECK
As good practice, is better to make a complete check of the instru-
ments twice per year.
The calibration check is normally made by using suitable thermo-
static bath and test instruments.
Check is carried out by checking the accuracy on the main divisions
of the dial. Proceed as follow:
■
Insert both the thermometer bulb and the test instrument into
a stable and uniform thermostatic bath.
■
Verify that immersion length of both instrument into the ther-
mostatic bath are the same.
■
Wait for three minutes for a table indication, then verify that
thermometer shows the same temperature of test instrument,
with foreseen tolerance.
■
Regulate, if necessary, the instrument indication using the ex-
ternal micrometric adjustment on the back side of the case or, in
some cases, using the micrometric adjustment on the pointer.
■
Then remove the thermometer from thermostatic bath.
Figure 3 and table of minimum bulb diameters and length “S” are
in mm
5 MAINTENANCE
The instrument doesn’t need any particular maintenance.
Do not lubricate the moving parts because this could attract dust
and form particles and impurities that could produce malfunctions
or accuracy errors.
6 DISMOUNTING AND DISPOSAL
The instrument is essentially made in stainless steel. Therefore,
after removing transparent, gasket, plugs and after removing all
the process fluid traces from the wetted parts (especially if fluid is
dangerous for persons or environment) the instrument could be
recycled or scrape.
Dispose of instrument components and packaging materials in an
environmentally compatible way and in accordance with the coun-
try-specific waste disposal regulations.
0... 60
150
135
130
0...80
135
110
105
0...100
115
110
105
0...120
110
100
95
0 ...160
100
90
90
Up to
0...500
RANGE °C
Stem Ø
6 or 6.4
Stem Ø
8 or 10
Stem Ø
12
WARNING
In event of accidental breaking of instrument transparent, it is ne-
cessary to replace it immediately, taking care of removing all the
small pieces from the case.
Documents
Instructions
H21017
www.trafag.com/H21017
Data sheet
H20017
H20018
www.trafag.com/H2001X
Additional information
