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4. Design and function
The measuring instrument must then immediately be brought back within the
permissible ambient temperature of 0 ... 50 °C [32 ... 122 °F].
4.8 Temperature measurements
For the temperature measurement of the digital thermometer, the correct immersion
depth in the medium to be measured is important.
At high temperatures, this can in turn influence the case temperature on the handle.
The maximum immersion depth in the medium to be measured depends on the
following factors:
Temperature to be measured
■
Medium
■
▶
Liquids, e.g. water, oil, ethanol
▶
Air
▶
Semi-solid (plastic or organic) materials
Probe tube length
■
Duration of measurement
■
Temperature
< 140 °C [284 °F]
> 140 °C [284 °F]
With cold media, < 80 °C [176 °F], the sensor can be immersed up to 10 mm [0.39 in]
below the edge of the case.
WIKA operating instructions, model CTP1500
Probe tube length
150 mm [5.91 in]
170 mm [6.69 in]
300 mm [11.81 in]
500 mm [19.69 in]
150 mm [5.91 in]
170 mm [6.69 in]
300 mm [11.81 in]
500 mm [19.69 in]
Maximum
immersion depth
90 mm [3.54 in]
110 mm [4.33 in]
240 mm [9.45 in]
440 mm [17.32 in]
50 mm [1.97 in]
70 mm [2.76 in]
200 mm [7.87 in]
400 mm [15.75 in]
Minimum
distance to
handle
60 mm [2.36 in]
100 mm [3.94 in]
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