Teledyne 9110TH - Nitrogen Oxides Analyzer - Manual (Page 68)

Model 9110TH NOx Analyzer Getting Started
Teledyne Analytical Instruments 48
3.7.2. BASIC O
2
SENSOR CALIBRATION PROCEDURE
If your instrument has an O
2
sensor option installed, that should be calibrated as well.
3.7.2.1. O
2
Calibration Setup
The pneumatic connections for calibrating are as follows:
C
ali
b
ra
ted N
2
at
HIG
H
S
pan
Co
nc
e
nt
rat
io
n
C
ali
b
ra
ted O
2
at
20
.8
%
Sp
an
Co
nc
en
tr
at
io
n
Source of
SAMPLE GAS
Removed during
calibration
Instrument
Chassis
SAMPLE
EXHAUST
PUMP
VE
N
T
3-way
Valve
Manual
Control Valve
VENT here if input
is pressurized
Figure 3-25: O
2
Sensor Calibration Set Up
O
2
SENSOR ZERO GAS: TAI recommends using pure N
2
when calibration the zero
point of your O
2
sensor option.
O
2
SENSOR SPAN GAS: TAI recommends using 21% O
2
in N
2
when calibration the
span point of your O
2
sensor option.