Vaisala PTU300 Podręcznik Użytkownika Pobierz pdf (Strona 40)

User's Guide ______________________________________________________________________

38 __________________________________________________________________ M210796EN-A

When there is no alternative but to install the sensor head in the

process vertically, the point of entry must be carefully insulated. The

cable must also be allowed to hang loosely as this prevents any

condensed water from running onto the sensor head along the cable.

0507-022

Figure 21 Vertical Mounting of Probe

Numbers refer to Figure 21 above:

1 = To be sealed.

2 = Insulate the cable.

3 = To be insulated.

4 = Let the cable hang loosely. This prevents condensed water

running to the sensor along the cable.

NOTE

Please do not attach a heated probe (PTU307) to metal structures to

avoid condensation problems caused by heat conduction along the

metal.

If the process temperature is much higher than that of the

environment, the whole sensor head and preferably plenty of cable

must be inside the process. This prevents measuring inaccuracy

caused by heat conduction along the cable.

When mounted on the side of a duct or channel, the sensor head must

be inserted from the side of the duct. If this is not possible and the

sensor head must be inserted from the top, the point of entry must be

carefully insulated.

For Vaisala probe installation kits and some installation examples see

Appendix A below on page 157.

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Vaisala PTU300 Podręcznik Użytkownika Strona 40