GE Analytical Instruments ©2006 DLM 14291 Rev. A
6-5
C A L I B R A T I O N
Z E R O G A S
C A L I B G A S
S u p p l y g a s w i t h k n o w n
N O c o n c e n t r a t i o n
E N T p r o c e e d C L R e s c
C a l i b r a t i o n g a s h a s
c o n c e n t r a t i o n o f :
4 5 . 0 0 P P
E N T a c c e p t C L R r e j e c t
C A L I B R A T I O N G A S U N I T
P P
P P B
C A L I B R A T I O N G A S C ON C
E n t e r : 9 1 . 5
↓ ↑
s c r o l l d i g i t s
E N T a c c e p t C L R r e j e c t
C a l i b r a t i o n g a s h a s
c o n c e n t r a t i o n o f :
9 1 . 5 0 P P
E N T a c c e p t C L R r e j e c t
C A L I B R A T E
P P
& P P B
P P
A I T t h e c a l i b r a t i o n
i s b e i n g p e r f o r m e d .
9 0 . 0 m V
C L R e s c a p e
containing >1 ppm (typically 10-100 ppm) to
calibrate the ppm response and have the
analyzer automatically calculate the response
for the ppb range. A disposable cylinder
containing 45 ppm NO in N
2
and regulator is
available from Sievers. Connect the gas
sampling line to one leg of the tee (see Figure
7-1) and adjust the gas flow rate to provide
>200 mL/min, so that excess gas flows out the
open leg of the tee. For the Sievers calibration
gas, install the tee on the Luer adapter on the
outlet of the regulator and open the valve on
the cylinder. The flow rate is set at 300
mL/min by the regulator.
To calibrate the response:
• From the Calibration Menu select Calib Gas
to display the instruction screen.
• After the calibration gas has been flowing
for ~5 minutes, press ENTER to display the
gas concentration screen.
The concentration and units for the calibration
gas are stored in the NOA battery-backed RAM.
The default concentration is 45 ppm. If a
different concentration is used, it is necessary
to enter the units and concentration and these
values will be stored for future use.
• If the 45 ppm gas is being used, press ENTER
and skip to the next page. If another
concentration is being used, press CLEAR.
• Select the gas units (PPM) and press
ENTER to display the Calib Gas Conc
Menu.
To Next Page
Loading...
