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© MECON GmbH BA / mag-flux HTL / EN / 21-04
INSTALLATION AND MODE OF OPERATION
3
INSTALLATION AND MODE OF OPERATION
The operating instructions are to be read in their entirety before installation and com-
missioning. Installation and repair may only be carried out by trained personnel! The
hydrant tester "mag-flux HTL" described in these operating instructions may only be used
for measuring the volume flow and pressure of electrically conductive liquids!
The principle of flow measurement is based on Faraday's Law of Electromagnetic Induc
-
tion, where the sensor converts the flow into a voltage proportional to the flow rate.
The pressure-sensitive element is a piezoresistive silicon chip with high sensitivity. It is
protected from environmental influences by a stainless steel housing.
3.1
System design
The meter consists of a flow sensor, a transducer and a pressure sensor. The flow sensor
is used to measure liquid media. The transducer generates the coil current required for the
magnetic field and creates the conditions to apply the induced voltage to the electrodes.
In the piezoresistive pressure sensor, measurements are made by the variable mobility of
the electrons in the crystalline structure, which has an influence on the resistivity. This is
caused by mechanical stress on the encapsulated sensor.
The nickel-metal-hydride high performance batteries used have a low self-discharge. For
this reason it is advisable that if the hydrant tester is not in operation for a long time, it is
charged regularly (at least once every four weeks).
3.2
Installation notes
Information!
All instruments are carefully checked for proper functionality before shipment.
On receipt, immediately check the outer packing carefully for damage or signs of improper
handling.
Report any damage to the carrier and your local sales staff. In such cases, a description of
the damage, the type and the serial number of the device should be given.
Unpack the unit carefully to avoid damage.
Check the completeness of the delivery against the packing list. Check the nameplate to
ensure that the delivered flow meter meets your order.
