Heinrichs Messtechnik
BGN Installation and Operating Instructions
Page 5 of 34
Subject to change without notice
5
Packaging, mounting and shipment
Carefully unpack the device to avoid damage. The float is secured against damage in transit depending on the device size.
Remove this transport protection from the fitting. By pressing the float from the bottom upwards (using a wooden stick, for
example), check whether the float can easily be moved upwards and slides back downwards. The pointer position of the indicator
unit must follow the direction of movement of the float.
With the help of the delivery note enclosed in the packaging, check whether all technically relevant data correspond with your
requirements.
Storage and installation must be done in a clean and dry room so that contamination
– especially of the interior of the fitting – is
avoided. Follow the limit values for ambient temperature. When transporting the device to a remote mounting location, we
recommend that you reuse the factory-issued packaging and the transport protection.
6
Operational mode and system design
6.1
Measuring principle
The measuring element consists of a sharp-edged
measuring ring (1)
and a conical
float (2).
A medium flows from the bottom to
the top through the measuring ring, lifting the float until the
buoyancy force (A)
and the weight of the float
establish equilibrium.
As the height of the float varies, an annular clearance proportional to the flow appears between the float and the measuring ring.
The height of the float in the measuring ring is a measure of the flow. The permanent
magnet (3)
embedded in the float then
transmits this measure to the
scale (5)
and the optional electronic evaluators through a
magnet tracking system (4).
6.2
System design
The meter consists of a cylindrical fitting pipe with flange connections on both sides. For measuring ranges from
5 to 50 l/h on, a measuring ring is inserted in the tube in which a conical float can move with vertical freedom. For small measuring
ranges of up to 4
–40 l/h, the measuring cell consists of a conical measuring tube with cylindrical float.
The height of the float resulting from the flow rate is transmitted in a rotary motion by a built-in permanent magnet through a magnet
tracking indicator system in a rotation to the pointer axis of the analog indicator unit.
7
Input
7.1
Measured variable
Volume flow
7.2
Measuring range (lower-range and upper-range value)
The lower-range value is considered 10% of the upper-range value.
Measuring range span: 10-100%
1
Smallest measuring range: 0.5-5.0 l/h water
Largest measuring range: 13.000 - 130.000 l/h water (stainless steel)
1
for water like liquids
1
5
4
3
2
A