Kobold DON-05, Руководство по эксплуатации

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DON-H
page 4 DON-H
01/0721
4. Regulation Use
The oval gear meter is a precise positive displacement flowmeter incorporating a
pair of oval geared rotors. These meters are capable of measuring the flow of a
broad range of clean liquids.
Stainless Steel flowmeters are suited to most water-based products and
chemicals and aluminium meters are suitable for fuels, fuel oils, & lubricating
liquids. It is important to ensure that the medium to be measured is compatible
with the materials used in the instrument (see section 10 “Technical Data”). It is
also imperative to comply with the maximum permissible operating parameters
specified in the “Technical Data” section.
The operation of the offered electronics (Zx, 1A…5A) is described in the separate
ZOK- (Ex) operating instructions.
Any use of the oval gear flow meter model: DON, which exceeds the
manufacturer’s specification, may invalidate its warranty. Therefore, any resulting
damage is not the responsibility of the manufacturer. The user assumes all risk
for such usage.
5. Operating Principle
Oval gear flowmeters are categorized as positive displacement flow technology.
When liquid flows through this type of positive displacement flowmeter, two oval
geared rotors measure a constant volume per rotation within a precisely
machined measuring chamber. With each rotation, a constant volume of liquid is
measured. The rotation of the oval gears is sensed via magnets embedded within
the rotors. These magnets transmit a high-resolution pulse output. The output
signal can be process externally via a remote display controller or PLC or via a
variety of output/display options available as accessories attached to the
flowmeters.
The positive displacement flow technology allows for precise flow measurement
of most clean liquids regardless of the media conductivity. Other liquid properties
also have a minimal effect on the performance of this type of meter. Flow profile
conditioning is not required as with alternative flow technology options making
oval gear installations simple to install in tight spaces and at an economical price.