Siemens SIPROCESS GA700 Operating Manual page 38

Description
3.6 Combined operation
Depending on the analyzer module, sample gas restrictors or clamping screws can be
mounted at the connections:
● The sample gas restrictor is used to dampen pressure fluctuations in the sample gas path
of an analyzer module.
– The sample gas restrictor is included with OXYMAT 7 analyzer modules and is pre-
– ULTRAMAT 7 analyzer modules are neither equipped with clamping screws nor
– CALOMAT 7 analyzer modules are always supplied with clamping screws.
● Depending on the application, however, you may also need to remove the sample gas
restrictor or move it to another module. The sample gas restrictor is screwed (grub screw)
onto the bushing of the gas path.
● If no sample gas restrictors are installed, the clamping screws take on the role of length
compensation for the gas connections.
Sample gas restrictors as well as clamping screws ensure a gas-tight connection of fitting
and gas line.
NOTICE
Leaky gas connections
A gas-tight connection cannot be achieved if you install the clamp ring screwed glands
before a sample gas restrictor or clamping screw was screwed onto the connecting socket.
The gas connection is irreversibly leaky.
• Observe the information provided by the manufacturer of the clamp ring screwed
• Before you install the clamp ring screwed glands, make sure that the connecting socket
Distinction between sample gas restrictors and clamping screws
Note
Distinction between sample gas restrictor and clamping screw
The sample gas restrictor and clamping screw differ in the bolt head and at the outlet
diameter at the bottom end.
• Sample gas restrictor: Slotted screw. Outlet diameter 0.5 mm
• Clamping screw: Cross-tip screw. Outlet diameter 2 mm
38
assembled at the factory.
sample gas restrictors. Retrofitting is not possible.
glands. Observe the corresponding installation guidelines.
is either equipped with a sample gas restrictor or with a clamping screw.
Operating with the Local User Interface
Operating Manual, 06/2017, A5E31930478-05