Maintenance; Inspection - ABB EasyLine EL3060 Series Instructions For Installation Start-Up And Operation

60 EasyLine EL3060 Series Commissioning Instructions

Maintenance

Inspection

Regular Inspection
Checking the Seal Integrity of the Gas Feed Paths
Measures Taken after Opening the Gas Paths inside the Gas Analyzer
Proceed in accordance with the checklist "Checking the installation" (see
page 43).
The seal integrity of the sample gas feed path and, if applicable, the ref-
erence gas feed path should be checked during operation at least once a
year. The seal integrity of the gas feed path must always be checked after
the gas feed path inside the gas analyzer has been opened (see below).
If measured values are output slowly during operation (e.g. after feed in
of the test gas) or implausible measured values are obtained, a leak in
the sample gas feed path is a possible cause.
A simple procedure for testing the seal integrity of the gas feed paths is
described in the section "Checking the seal integrity of the gas feed
paths" (see page 62).
All components of the case of the control unit and the analyzer unit
EL3060-Uras26 must be completely bolted together and locked against
rotation with the socket-head hex screws.
If the gas feed path or reference gas path inside the gas analyzer has
been opened, the seal integrity should be tested with helium at a leak
–4
rate of < 2 ´ 10
hPa l/s. As an alternative to the helium leak test, the
pressure drop method described in the section "Checking the seal integ-
rity of the gas feed paths" (see page 62) can be used. In this respect, the
test pressure is increased to p
duration to 15 minutes. The maximum excess pressure p
500 mbar).
Initial purging of the gas feed paths is required for the initial start-up and
each time the gas feed paths inside the gas analyzer have been opened
before the power supply is switched on. A potentially explosive mixture
gas/air mixture in the gas feed paths is thereby removed.
Purge gas for
non-flammable sample gas
Purge gas for
flammable sample gas
Purge gas volume
Purge gas flow
Purging time
The purge gas for purging the EL3060-Uras26 analyzer unit may not
contain any fractions of the sample components.
» 400 hPa (= 400 mbar) and the test
e
Clean instrument air from non-hazardous
areas
Inert gas
5x volume of the gas feed paths
approx. 30 l/h
at least 3 min
= 500 hPa (=
e