Type 8041

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7.

Product operation

7.1. Measuring principle

The E-shaped magnetic system inside the sensor induces a magnetic field into the fluid, which is perpendicular to the direction of flow. Two

electrodes are in galvanic contact with the liquid.

Based on the Faraday law a voltage can be measured between these electrodes once a liquid (min. conductivity of 20 µS/cm) flows along

the pipe. This voltage is proportional to the flow velocity.

Using the K-factor for the individual pipe diameter the speed of flow is converted into volume per time.

7.2. Functional overview

Display on the electronic board (PCB)

The settings needed for operation are made directly on the printed circuit board by means of 5 switches, a push button, a green LED, a red

LED and a bar graph.

Electronic board of the device

No. Description

1 2 3 4 5 6

1 2 3 4 5 6 7 8 910

C

NO

NC

1

3

5

6

2

4

7

1

Terminal strip:

• Operating voltage

• 4…20 mA output

• Frequency output

2

Relay connection

3

Push-button

4

Green LED:

• Flashing once every second: the device is energized.

• Flashing once up to 5 times: to know which parameter the bargraph

is indicating.

5

Red LED:

• Working mode (ON/OFF)

• Error signalling (flashing once up to 5 times)

6

10 LED bar graph to view and set the device parameters

7

• Switches 1 to 5 to configure the flowmeter (mains frequency,

filtering level of the measurements, measuring range)

• Switch 6: unused

The device can be calibrated by means of the K-factor (conversion coefficient), or via the Teach-In function.