Start-Up; Liquid Level Measurement; Flow Rate Measurement - Samson Media 6 Z Mounting And Operating Manual

Start-up

7 Start-up
See Fig. 2, Fig. 3 and Fig. 4.
Based on the following valve positions on the
valve block upon delivery:
− Open high-pressure shut-off valve (+)
and low-pressure shut-off valve (–)
− Closed equalizing valve
NOTICE
!
In cryogenic applications, the process medi-
um circulates during measurement when the
equalizing valve is opened, causing the
valve block to ice up.
If necessary, check zero at the dp cell (see
section 8.3) and put the device back into op-
eration.
NOTICE
!
During measurement, the equalizing valve
must be closed and the shut-off valves open.
22

7.1 Liquid level measurement

1. Slowly open the low-pressure line.
2. Close the equalizing valve or bypass of
the valve block.
3. Slowly open the high-pressure line.

7.2 Flow rate measurement

Measurement of steam
Make sure that the steam does not have di-
rect contact with the measuring diaphragm
of the device. To prevent this, screw off the
differential pressure lines below the shut-off
valves or valve block and fill the device with
water. Alternatively, make sure the shut-off
and equalizing valves or valve block are
shut off and wait approx. 20 min after start
up of the plant (steam in the system) until
condensate has collected in the differential
pressure lines above the valve and up to the
orifice plate.
1. Slowly open the high-pressure line.
2. Close the equalizing valve or bypass of
the valve block.
3. Open the low-pressure line.
4. Wait a while. Open both vent screws of
the dp cell one after the other until the
escaping condensate is free of bubbles.
Retighten the screws.
Vent the compensation chambers in the
same way. Lightly tap the housing of the
indicating unit or the compensation
chambers to help let the air escape.
5. Check zero (see section 8.3), and put the
device back into operation.
EB 9527-3 EN