Filter
Top Products
10 - 1
MEASUREMENT/SWITCHING OFF
MEASUREMENT
ETC00781(1) Series 100 e 10/2001
10. Measurement / Switching Off
10.1 Measurement
Analyzer warming-up after switching on takes about 15 to 50 minutes,
depending on the installed detectors !
P Supply sample gas to the gas inlet fitting (chapter 5.3).
P Switching on optional sample gas pump (c.f. chapter 7.4).
P Adjust the gas flow rate (with optional needle valve) within the specified rate.
The analyzer must be in the “analysis mode”, i. e. the displays must show
Note !
If another mode has been selected, the analyzer will automatically return to the analysis display when a
period of 60 - 120 seconds has elapsed after the last key actuation or after the last completion of an
operation !
The analyzer will remain at analysis display until another mode is selected.
Note for analyzers with electrochemical O
2
cell!
On account of the measuring principle the electrochemical O
2
cell needs a minimum internal
consumption of oxygen (residual humidity avoids the cell running dry). Continuously supplying cells
with dry sample gas of low grade oxygen concentration or with oxygen-free sample gas could result
a reversible change of O
2
sensitivity. The output signal will become unstable.
For correct measurement the cells have to be supplied with O
2
concentrations of at least 0.1 Vol.-%.
We recommend to use the cells in intervall measurement (purge cells with conditioned (removal of dust
but no drying) ambient air during measurement breaks).
If it is necessary to interrupt oxygen supply for several hours or days, the cell has to regenerate (supply
cell for about one day with ambient air). Temporary flushing with nitrogen (N
2
) for less than 1 h (e.g.
analyzer zeroing) does not influence the measuring quality.
10.2 Switching Off