KROHNE OPTIWAVE 5200 cFMus - Manual (Page 5)

ADDENDUM
2
5
OPTIWAVE 5200 C/F
www.krohne.com 12/2013 - 4003298801 - AD cFMus OPTIWAVE5200 R01 en
2.1 System design
There are 2 seals in the housing:
• The primary seal primary seal primary seal primary seal at the bottom of the housing. This is a wetted part that is made of FKM/FPM,
Kalrez
®
6375, EPDM or PFA. The primary seal material used depends on the options selected
in the customer order.
• The secondary seal secondary seal secondary seal secondary seal between the the electronics block compartment and the terminal / user
interface compartment.
2.2 Operating principle
An annunciation annunciation annunciation annunciation (pressure relief) valve valve valve valve is attached to one of the cable entries on the housing. It
has a red indicator that shows if the primary seal is damaged.
The valve opens when there is a difference of more than 1 bar / 14.5 psi between the pressure
inside the electronics block compartment and atmospheric pressure. The annunciation valve has
2 positions:
WARNING!
Make sure that the process fluid in the tank is compatible with the primary seal material.
INFORMATION!
No maintenance is necessary.
The device is supplied with the annunciation valve in its "CLOSED" position. Inspect the
annunciation valve carefully for damage or signs of rough handling. Report damage to the
carrier and to the local office of the manufacturer.
Annunciation
valve position
Relative pressure in the
electronics block compartment
Condition
[psi] [bar]
Closed < +14.5 < +1 The red indicator is in. The primary seal is in
good condition. The device is safe to use.
The red indicator is in. Possible failure of the
primary seal. The process fluid is in the housing
but cannot flow out of the valve. The device is
safe to use.
Open > +14.5 > +1 The red indicator is out. Failure of the primary
seal. The process fluid is in the housing and can
flow out of the valve.