Manual Zero/Span Check Or Cal With Zero/Span Gas In The Sample Port; Table 7-2: Manual Zeroc - Teledyne 9110AH Instruction Manual

Nitrogen oxides analyzer
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TELEDYNE Model 9110AH NO
7.1 Manual Zero/Span Check or Cal With Zero/Span Gas in
the Sample Port
The calibration of the instrument can be checked or adjusted using gas coming in the sample
port. This method is often used when the calibration gas is supplied from the stack sample
probe or external tank and valve system. This is the calibration method to use if the instrument
is purchased without the Zero/Span Valve option.
Table 7-2 details the zero calibration procedure with zero gas coming in through the sample
port.
Table 7-2: Manual Zero Calibration Procedure - Zero Gas Thru Sample Port
Step Number
1.
2.
3.
4.
5.
6.
7.
Analyzer Operator Manual, 01620, Rev. F
X
Action
Comment
Check "Before
Check "Before Calibration" Section 7 above before
Calibration"
proceeding.
Press CAL
The M9110AH enters the calibrate mode from sample mode.
The zero gas must come in through the sample port.
Select LO or HI
If AutoRange is enabled you will be prompted for which
Range
range to calibrate. Select the LO or Hi range, then press
ENTR.
Wait 10 min
Wait for reading to stabilize at zero value.
Press ZERO
If you change your mind after pressing ZERO, you can still
press EXIT here without zeroing the instrument.
Press ENTR
Pressing ENTR actually changes the calculation equations.
Press EXIT
M9110AH returns to sampling. Immediately after calibration,
data is not added to the DAS averages.
7-3

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