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Calibration Procedures
Teledyne API
– T200 NO/NO
2
/NO
X
Analyzer Operation Manual
186
9.3. MANUAL CALIBRATION WITH THE INTERNAL SPAN GAS
GENERATOR
I
MPORTANT
I
MPACT ON
R
EADINGS OR
D
ATA
The internal span
gas generator’s NO
2
permeation tube has a limited accuracy of
about ±5%.
9.3.1. PERFORMING
―PRECISION‖ MANUAL CALIBRATION WHEN
INTERNAL SPAN GAS (IZS) GENERATOR OPTION IS PRESENT
It is necessary to perform a precision calibration using more accurate zero and span gas
standards prior to IZS span calibration or cal check.
To perform a precision calibration of the T200, connect external sources of zero air and
calibrated span gas (Section 9.1.2) and temporarily disconnect the sample gas source as
shown below; then follow the procedures described in Section 9.2.3.
VENT
here if input
is pressurized
Source of
SAMPLE GAS
Removed during
“CAL” calibration
PUMP
MODEL 700E
Gas Dilution
Calibrator
Vent here if output of calibrator
is not already vented.
MODEL 701
Zero Gas
Generator
Enclo
sure Wall
Cal
ibrated N
Ox
at
H
IGH
Span
Concen
tration
External Zero
Air Scrubbe
r
Filter
Chassis
SAMPLE
EXHAUST
ZERO AIR
FROM DRYER
Figure 9-3: Pneumatic Connections for T200 Precision Calibration when IZS Generator Present
I
MPORTANT
I
MPACT ON
R
EADINGS OR
D
ATA
DO NOT USE THE CALZ or CALS buttons even though they will be visible, as this
will cause the instrument to use the internal zero air and span gas.
Instead, press the CAL button. This will cause the analyzer to use the external
calibration gas sources.
06858E DCN7057
Содержание T200
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