meibes Rossweiner logoplus Guia De Instalacion página 46

5. Assembly/installation
The free temperature sensors can be fitted in a ball valve or in a labelled pocket tested for conformity for this sen-
sor type. When installed in a pocket, the sensor must be pushed in to the bottom of the sleeve and then secured.
The installation location must be protected by a tampering protection. Ensure that the sensor is installed symmetri-
cally and preferably directly immersed.
Info: For meter assemblies of nominal diameter DN15/20, a temperature sensor is incorporated directly in the cou-
pling housing. With measuring capsules, a temperature sensor is directly tangentially installed in the screw head.
Installation in an immersion sleeve
The German Calibration Regulations (Eichordnung) stipulate that temperature sensors should be directly
immersed when they are installed with pipe diameters ≤ 25 mm.
The immersion sleeves must be identified and labelled in existing systems. Temperature sensors must
ONLY be used in immersion sleeves if they are listed in the PTB sleeve inventory list.
Installation in a ball valve (see Fig. 2, page 7)
1. Close the shut-off valves in the flow and return.
2. Close the ball valve.
3. Unscrew the plug screw or the old temperature sensor with the seal from the ball valve.
4. Place an O-ring from the attached set  on the mounting pin . The second O-ring serves as a replacement.
5. Insert the O-ring into the hole of the plug screw of the ball valve with the mounting pin using turning movements .
6. Position the O-ring in its final position using the other end of the mounting pin .
7. Place the two halves of the plastic screw around the temperature sensor . Press the two halves together so
that the two studs on one half of the plastic screw fit into the holes on the other half.
8. Insert the temperature sensor with the plastic screw into the ball valve and tighten the plastic screw by hand
(2-3 Nm).
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