3 Introduction
The "OTT PLS plug-in type" is equipped with a plug-in pressure probe cable, in
contrast to the standard model. In the case of damage to the device, the pressure
probe can thus be replaced more easily and deinstalling the pressure probe cable
is not necessary. In the same way, during the initial installation, first the pressure
probe cable (without pressure probe) can be pulled into an empty pipe. The plug-
in pressure probe cable also simplifies maintenance work.
The function of the pressure compensation capillary is maintained by an axial air
permeability in the plug-in connection. The connection must only be carried out in
a dry state above the water! The OTT PLS version with SDI-12 interface is not
available with a plug-in pressure probe cable.
4 Please note – important information
䊳Only transport and store while connected and screwed together!
䊳Before separating the plug-in connection, carefully clean and dry the pressure
probe and connector.
䊳When disconnected, avoid the entry of contamination and damp. Always
cover the connector and pressure probe with the protective caps supplied.
䊳Protect the thread, O-ring, sealing surfaces and the contacts for the pressure
probe and connector from mechanical damage.
䊳Do not use any tools to separate/connect the plug-in connection.
Only loosen/tighten by hand.
䊳Do not apply force to the connector. Where necessary, use cable grip to pull
on the pressure probe cable.
䊳Do not push the connector sleeve off the connector body.
䊳Do not remove grease in the connector applied at the factory.
䊳If the pressure probe cable is not installed: always protect the prefabricated
cable end against the entry of damp using the supplied transport protection
container!
5 Separating/inserting plug-in connection
The principle installation of the OTT PLS plug-in type is carried out as described
in the "Operating instructions OTT PLS Pressure Probe". Only separate the plug-in
connection in situations where this is absolutely necessary (limited number of
connection cycles). The gray wire in the pressure probe cable (SDI-12 data) is
not present with the OTT PLS plug-in type. (Compare Fig. 3 of the operating
instructions.)
Caution! Danger of damaging the device:
Avoid the entry of damp or contamination into the pressure probe and connector
when separating/joining the plug-in connection! Damp entering the device can
condense in the pressure compensation capillary if there are temperature variations
and lead to unusable measurement results.
How to separate the plug-in connection:
䡵Remove the pressure probe from the water, clean thoroughly and dry.
䡵Hold the pressure probe tight and turn the connector counter-clockwise until
the pressure probe can be pulled off.
䡵Immediately put the supplied protective cap onto the connector and pressure
probe (if necessary, secure the protective cap with adhesive tape).
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