Mounting The Measuring Instrument; Required Tools - Endress+Hauser IO-Link Dosimag Operating Instructions Manual

Electromagnetic flowmeter

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Table Of Contents

Table of Contents

Dosimag IO-Link

Endress+Hauser

Zero adjustment

The Sensor adjustment submenu contains parameters required for zero adjustment.

Detailed information on the "Sensor adjustment submenu": Device parameters

→  66

NOTICE

All Dosimag measuring instruments are calibrated in accordance with state-of-the-

art technology. Calibration takes place under reference conditions .

Zero adjustment is therefore not required for the Dosimag as a general rule.

‣

Experience shows that a zero adjustment is advisable only in special cases.

‣

When maximum measurement accuracy is required and flow rates are very low.

Detailed information on reference operating conditions →  57

Prerequisites for zero adjustment

Note the following points before performing the adjustment:

• A zero adjustment can be performed only with fluids that contain no gas or solid

contents.

• Zero adjustment is performed with the measuring tubes completely filled and at zero

flow (v = 0 m/s (0 ft/s)). Shutoff valves, for example, may be provided for this purpose

or existing valves and sliders can be used.

• Normal operation → Valve 1 open

• Zero adjustment → Valve 1 closed

 4

Performing the zero adjustment

1. Let the system run until normal operating conditions are present.

2. Stop the flow (v = 0 m/s (0 ft/s)).

3. Check the shutoff valves for leaks.

4. Perform adjustment using the Zero point adjustment control function.

6.2