SERVO
PRO NANOCHROME Gas Analyser
82
04416001A / Revision 7
The calibration procedure is described below.
1.
Check that there is no cycle currently running. Click on
Run-Real Time
Chromatogram
, then select
the
Manual Injection
option.
Click on the
Calibration-Calibration
menu (see Figure 39).
2.
Enable the
Noise Threshold Calibration
with the
Enable
(F2)
button.
3.
Select
Calculate Threshold for
All peaks
or
Selected peaks
by changing
the corresponding slider state. When
Selected peaks
is selected, only
peaks that have a
YES
in the
Select
column of the grid
will be
considered.
4.
Click on
Start (F4)
button to start calibration
5.
After one cycle in manual injection has completed, press the
Calculate
Threshold
button. The RMS value will be shown in the
THRSH
column
of the grid.
6.
When the
Noise Threshold Calibration
is completed,
YES
is displayed
in the
TRS done
column of the grid.
7.
Disable the
Noise Threshold Calibration
with the
Disable (F2)
button
(one button performs dual functions Enable or Disable, depending on the
active mode).
4.7.2 Span Calibration
The
dilution factor
represents the internal dilution ratio and is set to 1 unless the
analyser is fitted with an internal dilution system.
If the analyser is fitted with an internal dilution system:
Sample inlet 1 is used for the process gas, and sample inlet 2 is used for the
span gas.
Pressing the
Click for Span
button will select analyser sample inlet 2.
Diluted Value:
equals the
Calib Gas Value
column divided by the
dilution
factor
(see
Each chassis in a multiple chassis analyser may be fitted with an internal
dilution system and the associated dilution factor can differ depending on the
impurity to be analysed. This information is provided with each analyser in
the Test Results Sheet (TRS).
Refer to section “
Internal dilution system setup
”
for more information.
