Burkert 8081 Manuel Utilisateur page 16

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Please be careful to respect the correct direction of fluid
flow in the pipe. It is indicated with an arrow, marked on the
underside of the fitting.
It is advisable to avoid placing the 8081 transmitter near
any source of electromagnetic interference (switch, electric
motor, fluorescent lamp, ...).
16
When horizontally
mounted, the max. fluid
temperature is 90°C.
But the max. fluid tem-
perature must be re-
duced to 80°C when the
electronics (black enclo-
sure) is turned upwards.
When vertically mounted
the max. fluid tempera-
ture is also 80°C.
english
Type 8081
Installationandwiring
Minimum upstream and downstream distances are not necessary.
The 8081 works correctly when the pipe is full and free of any air
bubbles near the transmitter. In presence of bubbles in the pipe, the
left installation no.1 should be avoided.
1 2
If the absence of any air bubbles cannot be guaranteed, the device
should then be fitted on an horizontal pipe, with the electronic enclo-
sure facing down. Thus the bubbles will not interfere with the circu-
lation of ultrasonic waves.
3 4