ZIROX XS22, Manual

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Measuring system XS22-E2010 1 Introduction
6
XS22_E2010
Symbol for proper handling:
This symbol appears where the manual refers to the adherence to rules,
instructions and proper operation.
In case of disregard damage or destruction of the VMS or its single
components may result.
1.4 Safety instructions
The following safety instructions inform about potential danger during the
operation of the oxygen measuring system (VMS). They must be strictly
followed by the responsible staff.
A failure-free and functional operating of the VMS can only be ensured with
knowledge of this manual. Please read all the chapters of this equipment
manual carefully before the installation and initiation.
The VMS is to be used for the functional operation only (see 1.5).
The VMS is to be installed, operated and serviced by trained staff
only.
Special safety instructions for potential danger in certain working
processes are given in relevant text passages.
1.5 Application of the measuring system
The measuring system is used for in situ measurements of oxygen in gases.
Typical examples are:
•
Measurings in vacuum processes (PVC, CVD, other plasma
processes)
•
Measurings in process gases conducted under non-standard
pressure (e.g. surface treatment processes)
•
Measurings in science and research
The measuring gas can be temporarily reducing
1
. It must by no means
represent an explosive compound since the probe with its heater works as
an ignition source.
A consultation with the manufacturer is required before measurings in
corrosive gases, the danger of condensate formation or failure of carbon.
1
D
ifferent conditions of oxygen in the measuring gas must be distinguished:
Free oxygen: Oxygen molecules in the gas are independent without a bond to other gas components (inert gases
such as N
2
or Ar). In combustion engines this is called “lean mixture”.
Bound oxygen: Free oxygen molecules do not exist in the gas, only in bound form e.g. as water vapor. Higher
temperatures cause a dissociation and oxygen molecules are available. Since the dissociation degree increases
with the temperature, the measurement result depends on
the
temperature. In combustion engines this is called
“rich mixture”.
Possibly, free oxygen can react with potential burnable gases at the hot platinum electrode. The result can be a
reducing gas.
NOTE
attention
danger