Vega VEGADIF 65 Operating Instructions Manual page 59

4 ... 20 ma differential pressure transmitter with metallic measuring diaphragm

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Measurement setup

for closed vessels with

steam overlay

Prepare the adjustment

VEGADIF 65 • 4 ... 20 mA

III

Fig. 48: Preferred measurement setup for closed vessels with steam overlay

VEGADIF 65

3-fold valve block

III Separator

IV Condensate vessel

1, 5 Drain valves

2, 4 Inlet valves

Breather valve

6, 7 Vent valves on VEGADIF 65

A, B Blocking valves

Proceed as follows:

1. Fill the vessel to just above the lower tap

2. Fill measuring system with medium

Open valve A and B: Open block valves

Fill the minus effective pressure line on the height of the conden-

sation pot

3. Remove air from instrument:

Open valve 2 and 4: Discharge medium

Open valve 3: Equalisation plus and minus side

Briefly open valve 6 and 7, then close again: Fill the measuring

instrument completely with the medium and remove air

4. Put measurement loop into operation:

Close valve 3: Separate plus and minus side

Open valve 4: Connect minus side

Now:

Valve 3, 6 and 7 are closed

Valves 2, 4, A and B are open.

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7 Setup

III

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