Yokogawa RAKD Bedienungsanleitung PDF herunterladen (Seite 21)

<4. START OF OPERATION>

4-1

IM 01R01B30-00E-E 5th edition January 01, 2013 -00

4. Start of operation

4.1 Hints on ow rate measurement

The measured uid should neither consist of a multi-phase mixture nor contain ferrite ingredients or large solid

mass particles.

The RAKD scale is adjusted to the state of operation/aggregation of the measured uid by the manufacturer. If

the state of operation changes, it might become necessary to establish a new scale.

This depends on several factors:

- If the RAKD is operated in the given viscosity independent range, only the density of the oat as well as the

operational density of the previous and new substance have to be considered. In case the operational

density only changes marginally (≤ 0.5%), the present scale can be used.

- If the RAMC is operated outside the given viscosity independent range, the viscosities at the previous and

new state of operation as well as the mass and diameter of the oat have to be taken into account.

To establish a new scale, please refer to the folder “Anweisung zur Skalenumrechnung” (Instructions for

Scale Conversion) as well as the conversion table or order a new scale.

4.2 Pulsation and pressure shock

Strong pressure impact or ow pulsations can impair measuring operation considerably and should be avoided

open valves slowly, raise operating pressure slowly).

4.3 Start of operation of electronic transmitter

Ensure that the device has been connected correctly according to section 3-2 and that the used power supply

meets the requirements indicated on the scale.

Switch on the power supply..

The RAMC is now ready for operation..

The transmitter is prepared and calibrated according to its model code as a 2 wire unit.

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Yokogawa RAKD Bedienungsanleitung Seite 21