30
8 Handling
8
Handling
8.1
Transport
Avoid vibrations when transporting the thermometer. Also ensure that the thermometer is not exposed
to humidity.
When the goods are received, check whether the packaging and thermometer are free of transport dam-
age and mechanical damage. If you discover damage, do not use the thermometer.
The devices must be stored properly. Observe the storage temperature of between 10 and 45 °C.
8.2
Mounting
In addition to the criteria listed below, also consult VDI/VDE 3511 sheet 5 and the explanations therein
on the installation process for thermometers.
Before mounting a thermometer, check that it is suitable for the operating conditions. Consider the fol-
lowing key technical data:
•
Measuring and operating temperature range
•
Dimensions (insertion length and protection tube diameter)
•
Maximum pressure resistance in connection with the flow velocity
•
Protection type according to DIN EN 60529
•
The suitability of all the components (seals, protection tubes, etc.) for use in the medium/atmosphere
It is also important to ensure the device is correctly mounted in the installation location. Information on
this is provided in the following subchapters. The plant's process connection must match the thermom-
eter connection.
The probes should be inserted slowly into any processes where the temperature differs from the ambient
temperature. This is particularly important for thermometers with a ceramic protection tube.
When selecting the installation location, ensure that the thermometer will be protected against vibrations
(caused by flows, motors, pumps, etc.). Similarly, do not install it in the vicinity of electromagnetic fields
(such as from motors or transformers).
Observe the recommended measuring current and the maximum current for the sensors of the RTD tem-
perature probes.
Further information and measuring currents for special sensors can be found in data sheet 906121
(PCA sensors), 906022 (PK sensors), 906125 (PCS sensors), 906123 (PCKL sensors), 906124 (PC
sensors in a cylindrical style), etc.
Thermometers with a ceramic tube must not fall to the ground or be subjected to any other impacts
during their entire lifespan. The ceramic tube is brittle and could easily break if subjected to such loads.
Sensor
Recommended measuring
current/mA
Maximum current/
mA
Pt100 (PCA, PCR, PCS, PCSE)
1.0
7.0
Pt500 (PCA, PCR, PCS, PCSE)
0.7
3.0
Pt1000 (PCA, PCR, PCS, PCSE)
0.1
1.0
PK
1.0
20.0
