Teledyne GFC-7000T - Trace CO2 Analyzer - manual - Manual (Page 58)

Getting Started Model GFC7000TA Carbon Dioxide Analyzer
Teledyne Analytical Instruments 40
3.8.1. Initial O
2
Sensor Calibration Procedure
If your instrument has an O
2
sensor option installed that should be calibrated as well.
3.8.1.1. O
2
Calibration Setup
The pneumatic connections for calibrating are as follows:
C
a
li
bra
ted N
2
at
HI
GH
Span
Co
nc
ent
rat
ion
C
a
lib
ra
te
d
O
2
at
20.
8%
Sp
an
C
on
cen
tr
at
io
n
VE
NT
Figure 3-16: O2 Sensor Calibration Set Up
O
2
SENSOR ZERO GAS: Teledyne Instruments’ recommends using pure N
2
when calibration the zero
point of your O
2
sensor option.
O
2
SENSOR SPAN GAS: Teledyne Instruments’ recommends using 21% O
2
in N
2
when calibration the
span point of your O
2
sensor option.
3.8.1.2. O
2
Calibration Method
STEP 1 – SET O
2
SPAN GAS CONCENTRATION :
Set the expected O
2
span gas concentration.
This should be equal to the percent concentration of the O
2
span gas of the selected reporting range
(default factory setting = 20.8%; the approximate O
2
content of ambient air).