Siemens SIPROCESS GA700 Quick Start Manual page 27

For rack-mounted and wall-mounted devices, the sample gas connections of the analyzer
modules are 6 mm nozzles. Clamp connections are mounted onto these nozzles which must
be connected tightly to the incoming gas lines and outgoing gas lines.
Depending on the analyzer module, sample gas restrictors or clamping screws can be mounted
at the connections:
● The sample gas restrictor is used to regulate the flow of gas 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 sample
– CALOMAT 7 analyzer modules are only 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 clamping ring connections 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 clamping ring connections.
● Before you install the clamping ring connections, make sure that the connecting socket is
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
Quick Start
Compact Operating Instructions, 05/2015, A5E31805656-03
assembled at the factory.
gas restrictors. Retrofitting is not possible.
Observe the corresponding installation guidelines.
either equipped with a sample gas restrictor or with a clamping screw.
Combination operation
3.3 Gas connections
27