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- Series VMM
Cleaning, maintenance, storage
Technical changes reserved
- 49 -
9
Cleaning, maintenance, storage
9.1
Cleaning
Clean the VMM with a dry or slightly damp lint-free cloth.
Do not use sharp objects or a
g-
gressive agents for cleaning.
9.2
Maintenance
The VMM is maintenance-free cannot be repaired by the user. In case of a defect, the device
must be replaced or returned to the manufacturer for repair.
The VMM has no parts which have to be replaced or
adjusted regularly.
Even though the units are maintenance-free, it is recommended to check the flow meter for
signs of corrosion, mechanical wear and damages at regular intervals.
We recommend routine checks at least once annually
.
To clean and visually inspect the electrodes and the interior lining, the unit has to be re-
moved from the pipeline.
CAUTION! Risk of injury!
Perform all installation and connection work only when the supply voltage is switched
off.
The connection between sensor and display electronics under voltage must not discon-
nected or short-circuited!
Make sure that the plant is shut down professionally.
CAUTION! Risk of injury or material damage!
When removing the unit from the pipeline, take appropriate safety precautions. Always
use new gaskets during the new installation in the pipeline.
Mains fuse:
The mains fuse is located in the terminal compartment. Before replacing the fuse, the power
has to be switched off. Check carefully that the transmitter is voltage free.
The fuse may only be replaced by the exactly same type of fuse!
Mains fuse:
-
0.2 x 0.8 in(5 x 20 mm) (according to DIN 41571-3)
-
Rated voltage
250 V AC
-
Braking capacity
80 A
@
250 V AC
115/230 V
AC
= 100 mA (T)
24 V
DC
= 1 mA (T)
