AFRISO Unitel, Operating Instructions Manual, Page: 43 / 169

18
Operation
EN
Unitel
6 Operation

Precise measurements are not possible during filling of the tank. The
pointer does not provide a stable reading during filling.
The product provides semi-permanent indication. The pump closes off the
measuring line when it reaches the upper dead end. The pointer stays tem-
porarily at its last reading and then drops back very slowly. As a result of this,
the gauge mechanism is protected by an air cushion.
1. Pull out the pump plunger all the way to the stop.
2. Then release the pump plunger.
3. Repeat the pumping procedure until the indicated value no longer
changes.
4. Read the level on the scale.
- If the measuring line has been installed airtight, the pointer of the gauge
will continue to show the last reading for a long period of time. In order
to obtain an accurate reading, operate the pump before a reading is
taken.
The red reference pointer can be adjusted manually, for example to the level
after the last filling. The red reference pointer lets you compare the current
level to a previous level for consumption monitoring.
6.1 Use in flood hazard areas
The product is suitable for use in flood hazard areas; it is watertight up to
10 m water column (1 bar pressure).
The product does not have to be replaced after a flood.