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- Sample gas inlet 1 must be closed by a blanking plug. A shut-off valve (e.g. needle valve) of
sufficient tightness must be connected between sample gas outlet 2 and the sample gas dissipation.
- A pressure sensor (measuring range: 50 kPa, resolution :1 hPa) must be connected to the supply
line.
- Proceed similarly for the reference gas path, if present (dashed line, connections 3 and 4).
6.1.3
Carrying out the leak test
- To establish a pressure, carefully open the needle valve until the test pressure has been reached in
the containment system. Then close the valve again.
- Before determining the rate at which the pressure drops, you must allow thermal compensation of
the system. A waiting time of 5 minutes is recommended. The temperature of the sample gas path
must not change during the test!
- Testing for leaks is carried out by determining the pressure change ∆p within a further 5 minutes.
- The gas path is sufficiently tight if the pressure change ∆p in 5 minutes is below the test value listed
in the following table.
OXYMAT 6F
CALOMAT 6F
ULTRAMAT 6F
)
*
The test values have been defined under the assumption that the volume between the shut-off units (valves)
and the containment system is max. 10 ml; this corresponds to a length of approx. 80 cm with a pipe of 4
mm internal diameter.
6.2
EEx p safety device
The diagnostics and elimination of faults is described in the manual of the EEx p safety device
concerned.
The proportional valve controlled by the EEx p safety device is protected by a fuse. This fuse may be
located in an inaccessible part of the control electronics in some EEx p safety devices. The control
electronics must be replaced if the fuse is defective. The manufacturer must be notified of the serial
number to allow the replacement electronics to be provided with the same parameters as when
originally delivered. Repairs may only be made by authorized personnel of the EEx p safety device's
manufacturer.
It is not possible to switch over to the pre-purging phase if the proportional valve or outlet valve fails.
6.3
Analyzers and additional equipment
Maintenance and troubleshooting of the analyzers and additional equipment is described in the
appropriate manuals.
The tightness of the gas line must be checked after any manipulation, e.g. cleaning the sample
chamber. The test can be made according to the procedure described in Section 6.1.
6.4
Spare parts
Only the following spare part may be used in the event of damage to the left-hand door module (with
keyboard and display):
There is a fuse on the rear of the left door. Only the following type may be used as a replacement:
Additional Equipment Manual EEx p
Order No.:
A5E 000
58873-02
Test pressure 2.0 bar (rel.)
Test pressure 0.5 bar (rel.)
Test pressure 0.5 bar (rel.)
with a chamber length in mm
)
Test value*
Left door, complete (Ex), Order No. A5E00063409
Device fuse (Ex),
Test value*
Test value*
0.2...6
∆ ∆ ∆ ∆ p in mbar
20
Order No. A5E00061501
English
)
∆ ∆ ∆ ∆ p = 24 mbar
)
∆ ∆ ∆ ∆ p = 30 mbar
20
60
90
180
16
12
9
6
E-15
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