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8-2
EB 9510 EN
Operation
The differential pressure of liquids, vapors and gases are measured by the integrated dp cell
in the Media 7 device. The measured differential pressure is used for the differential pressure
and filling level measurement.
The operating mode (differential pressure or filling level) is set in the [Operating mode| 1.4]
parameter. The differential pressure measurement is the default setting in the differential pres-
sure meter.
1. Press key (in start screen) to go to the main menu.
2.
Select [Start-up| 1] with
or
key and confirm with
key.
3.
Select [Operating menu| 1.4] with
or
key and confirm with
key.
4. Press
key and select differential pressure or filling level with
or key.
5. Press
key to confirm the setting.
8.1
Differential pressure measurement
Two absolute pressures p
1
and p
2
are compared for the differential pressure measurement.
This allows, for example the filters to be monitored by measuring the upstream and down
-
stream pressures at the filter.
8.2
Liquid level measurement
The tank content (function of
hydrostatic pressure, tank ge-
ometry and liquid density of
the stored gas) is displayed
proportionally and the oper-
ating pressure is indicated in
the selected unit on the dis-
play. The adjacent image il-
lustrates the principle of the
liquid level measurement.
Media 7
with valve block
Tank
+
_
Ar, N
2
,
O
2
, CO
2
H
h
h
Measured height (≈ tank content)
H
Measuring range
Fig. 8-1:
Principle of liquid level measurement
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