Siemens 7MB2335, Operating Instructions Manual, Page: 16 / 168

Installation Guidelines
2-2
Operating instructions ULTRAMAT 23 gas analyzer
C79000-B5276-C216-03
2.1 Safety Information
!
Warning
Certain parts in this analyzer carry dangerous voltages. The housing
must be closed and earthed before switching on the analyzer.
!
Warning
The analyzer must not be used in hazardous areas. Explosive gas
mixtures (e.g. flammable gases together with air or oxygen in a
potentially explosive ratio) must not be measured.
!
Warning
if the sample gas could contain flammable components above the
lower explosion limit (LEL), the analyzer version ’Gas path as pipe’ is
required (see chapter 8.4).
!
Warning
The gas path must be checked for leaks at regular intervals depending
on the corrosivity, toxicity and flammability of the sample gas. When
measuring toxic or corrosive gases, it may occur that sample gas
collects within the analyzer as a result of leaks in the gas path. To
prevent the danger of poisoning or the damaging of analyzer
components, the analyzer or system must be purged with inert gas
(e.g. nitrogen). The gas displaced by purging must be collected using
an appropriate assembly and routed for environment-friendly disposal
via an exhaust line.
The follwoing safety and warning notes apply to all devices, which are
operated according to FM/CSA Class I Div. 2 (hazard locations) and
ATEX zone 2:
!
Warning
Exposure to some chemicals may degrade the sealing properties of
materials used in the following devices:
- Relais on mainboard: W79052-K5001-C5; manufacturer: Axicom,
part V23026-A1001-B20
- IR-Radiation Source: C79451-A3468-B205 or 206;
manufacturer: Siemens AG
FM/CSA Class I
Div. 2 ,
ATEX Zone 2