CO/SO2 Zero Baseline
and Response Check/Adjustment
Purpose: The CO/SO2 zero baseline and response
check/adjustment assures that the CO and SO2 analyzers have the correct gas
calibration. This can be accomplished by
introducing a known quantity of gas to the inlet and checking the response on
the instrument. The terminology for this
type of check is GRC (Gas Replacement Calibration). Each GRC has a RF (Response Factor). This RF value should be 1.000.
Required Equipment: Precision flat head screwdriver
Reference: SOPMAN Pages XX-XX
CO Analyzer Zero Baseline Check/Adjustment
1.
Open the Gas
Calibration worksheet.
2.
On DataView go to
the tools tab and select Trigger Cals.
3.
In the trigger
cals menu select CO Zero and press Start Calibration.
4.
Under the tools
tab select Query 1-Minute Data. In the
query data tool menu select CO.
5.
Enter the
Background (BKG) number onto the Gas Calibration worksheet in the Zero Baseline
Adjustment section. The number should be
entered in the as found column.
6.
To find the BKG number
on a 48CTL analyzer scroll down to Calibration Factors and press enter. Then scroll to CO BKG PPM and press
enter. The top number is the PPM (Parts
Per Million) number for the analyzer and the bottom number is the BKG number. (Note:
The analyzer reads in PPM and the DAS reads in PPB. If the analyzer is 0.500 PPM the DAS should
read 500 PPB.)
7.
Wait 7-10 minutes
or until the CO number is stable. Press
Get Data on the query data tool. If the
query data numbers are larger or approximately equal to the number on DataView
then the data is stable and an average can be taken.
8.
Enter the CO data
in the as found Zero Baseline Adjustment section of the Gas Calibration worksheet. The DAS number should be approximately 200
PPB and the analyzer should be approximately 0.200 PPM. If it isn’t, adjust the BKG or Zero Pot.
9.
The 48CTL
analyzer should already be in the adjustment screen (follow step 6). Use the up and down arrows to adjust the
Background number so that the DAS CO number is ~200 PPB or the analyzer is
~0.200 PPM. When this is complete press
enter on the analyzer.
10.
Record the final
BKG and/or Zero Pot number in the as left cell of the Gas Calibration worksheet.
11.
On the query data
tool press Get Data and enter the CO number in the as left cell of the Gas
Calibration worksheet.
12.
Press Run or Auto
on the analyzer and close the Trigger Cals Menu.
SO2 Analyzer Zero Baseline Check/Adjustment
1.
Open the Gas
Calibration worksheet.
2.
On DataView go to
the tools tab and select Trigger Cals.
3.
In the trigger
cals menu select CO/SO2 Zero and press Start Calibration.
4.
Under the tools
tab select Query 1-Minute Data. In the
query data tool menu select SO2.
5.
Enter the
Background (BKG) or Zero Potentiometer (Zero Pot) number onto the Gas
Calibration worksheet in the Zero Baseline Adjustment section. The number should be entered in the as found
column.
a.
To find the BKG
number on a 43CTL analyzer scroll down to Calibration Factors and press enter. Then scroll to SO2 BKG PPB and press
enter. The top number is the PPB (Parts
Per Billion) number for the analyzer and the bottom number is the BKG number.
b. On a 43S analyzer the Zero Pot is on the front of the
instrument. Read the number in the
window then the number on the hash marks and then count the number of hash
marks from the main number to the pointer.
(Ex.: window = 2, main hash mark
number = 7, the number of hash marks from the main number to the pointer = 4 –
From this information the Zero Pot number is 2.74.)
6.
Wait 7-10 minutes
or until the SO2 number is stable. Press
Get Data on the query data tool. If the
query data numbers are larger or approximately equal to the number on DataView
then the data is stable and an average can be taken.
7.
Enter the SO2
data in the as found Zero Baseline Adjustment section of the Gas Calibration worksheet. The PPB number should be approximately
1.00. If it isn’t, adjust the BKG or
Zero Pot.
a.
If you have a
43CTL analyzer it should already be in the adjustment screen (follow step
6). Use the up and down arrows to adjust
the Background number so that the SO2 PPB number is ~1.00. When this is complete press enter on the
analyzer.
b. On a 43 S analyzer adjust the Zero Pot until the SO2
PPB reading is approximately 1.00.
8.
Record the final
BKG and/or Zero Pot number in the as left cell of the Gas Calibration worksheet.
9.
On the query data
tool press Get Data and enter the SO2 number in the as left cell of the Gas
Calibration worksheet.
10. Press Run or Auto on the analyzer and close the
Trigger Cals Menu.
CO/SO2 Analyzer Response Check
1.
This procedure will
obtain the initial or current RF value for the CO and SO2 analyzers.
2.
Open the Gas
Calibration Worksheet and enter the correct CO and SO2 concentrations (found on
the gas cylinder) in the blank provided.
3.
On DataView go to
the tools tab and select Trigger Cals.
4.
In the Trigger Cals
menu, select CO/SO2 Zero and press Start Calibration.
5.
Under the tools
tab select Query 1-Minute Data. In the
query data tool menu select Air MFC, Gas MFC, CO and SO2.
6.
Wait 20 minutes
or until the data for CO isn’t changing by more than 3 PPB per minute and the
SO2 isn’t changing by more than 0.05 PPB per minute. This is so that the instruments can equalize
before going on to the next step.
7.
Press Get Data on
the query data tool. If the query data
numbers are approximately equal to the number on DataView then the data is
stable and an average can be taken.
8.
Enter the Air MFC,
CO and SO2 data in the as found section of the Gas Calibration worksheet.
9.
Go to Trigger Cals
and push Stop Calibration then select CO/SO2 GRC Point 1 and press Start Calibration.
10.
Wait 7-10 minutes
or until the data for CO and SO2 are stable.
Press Get Data on the query data tool.
11.
Enter the Air MFC,
Gas MFC, CO and SO2 data in the as found section of the Gas Calibration
worksheet. Also enter the COEF and/or
Span Pot number.
a.
To find the COEF
(Coefficient) on a 48CTL CO analyzer scroll down to Calibration Factors and press
enter. Then scroll to CO COEF and press
enter. The top number is the PPM (Parts
Per Million) number for the analyzer and the bottom number is the COEF number.
b.
To find the COEF
(Coefficient) number on a 43CTL analyzer scroll down to Calibration Factors and
press enter. Then scroll to SO2 COEF and
press enter. The top number is the PPB
(Parts Per Billion) number for the analyzer and the bottom number is the COEF
number.
c.
On a 43S analyzer
the Span Pot is on the front of the instrument.
Read the number in the window then the number on the hash marks and then
count the number of hash marks from the main number to the pointer. (Ex.:
window = 2, main hash mark number = 7, the number of hash marks from the
main number to the pointer = 4 – From this information the Zero Pot number is
2.74.)
12.
Go to Trigger Cals
and press Stop Calibration then select CO/SO2 Zero and press Start Calibration.
13.
Wait 7-10 minutes
or until the data for CO and SO2 are stable.
Press Get Data on the query data tool.
14.
Enter the Air MFC,
CO and SO2 data in the as found section of the Gas Calibration worksheet.
15.
The Actual
Expected value is calculated by adding the final Zero Value and Calculated
Expected Value.
16.
The RF is now
displayed at the far right of the worksheet.
If the RF is between 0.98 and 1.02, the calibration check is
complete.
17.
Close the trigger
cals window and query data window.
18.
Save the Gas
calibration worksheet, and then print the CO and SO2 Response information and
fax to
19.
If either RF is
not within the specified range continue with the Analyzer Response Adjustment.
CO/SO2 Analyzer Response Adjustment
1.
This procedure
will be used to adjust the analyzers and obtain a corrected RF value for the CO
and SO2 analyzers.
2.
Using the as
found data for the CO/SO2 Zero, enter the Air MFC, CO and SO2 values in the as
left section.
3.
On DataView go to
the tools tab and select Trigger Cals.
4.
In the Trigger Cals
menu, select CO/SO2 GRC Point 1 and press Start Calibration.
5.
Under the tools
tab select Query 1-Minute Data. In the
query data tool menu select Air MFC, Gas MFC, CO and SO2.
6.
Wait 7-10 minutes
or until the data for CO and SO2 are stable.
7.
Adjust the
instruments.
a.
On 48CTL CO analyzers
push menu. Scroll down to CAL FACTORS
and push ENTER. Go to the CO COEF and
press enter. The top number is the PPM
(Parts Per Million) number for the analyzer and the bottom number is the COEF
number. Use the up and down arrows to
adjust the COEF number so that the DAS CO PPB number approximately equal to the
Actual Expected value from the as found section. When this is complete press enter on the
analyzer.
b.
On 43CTL analyzers
push menu. Scroll down to CAL FACTORS
and push ENTER. Go to the SO2 COEF and
press enter – Set the SO2 COEF to 1.0.
The PMT can be adjusted by taking the top off of the analyzer. With the top of the analyzer off, look on
the left side of the bulkhead at the front.
There is a blue box with an orange grommet on the top. Inside the grommet is the PMT adjustment
screw. Slowly adjust the analyzer until
the SO2 ppb on the analyzer, or SO2 on DataView, is approximately equal to the
Actual Expected value from the as found section. The PMT adjustment screw on the inside of the
analyzer is a coarse adjustment and the SO2 COEF is a fine adjustment. The SO2 COEF should always be close to a
standard of 1.00 but it can be used to adjust the instrument to a tighter
tolerance. The SO2 COEF will adjust the
instrument in smaller increments than the PMT adjustment. Replace the top of the analyzer.
c.
On 43S analyzers
set the Span Pot to 5.00. Open the front
door on the analyzer and slowly adjust the PHOTOMULTIPLIER GAIN screw until the
SO2 reading on the analyzer, or SO2 on DataView, is approximately equal to the
Actual Expected value from the as found section. The PMT adjustment screw on the inside of the
analyzer is a coarse adjustment and the Span Pot is a fine adjustment. The Span Pot should always be close to a
standard of 5.00 but it can be used to adjust the instrument to a tighter
tolerance. The Span Pot will adjust the
instrument in smaller increments than the PMT adjustment.
8.
When the analyzer
adjustments are complete, let the analyzers stabilize for 7-10 minutes. Press Get Data on the query data tool.
9.
Enter the Air
MFC, Gas MFC, CO and SO2 data in the as found section of the Gas Calibration
worksheet. Also enter the COEF and/or
Span Pot number.
10.
The Actual
Expected value is calculated by adding the final Zero Value and Calculated
Expected Value.
11.
The RF is now
displayed at the far right of the worksheet.
If the RF is between 0.98 and 1.02, the calibration adjustment is
complete. If the RF is not within spec,
repeat the adjustment part of the procedure again.
20.
Go to Trigger Cals
and press Stop Calibration then select CO/SO2 Zero and press Start Calibration.
21.
Wait 7-10 minutes
or until the data for CO and SO2 are stable.
Press Get Data on the query data tool.
22.
Enter the Air MFC,
CO and SO2 data in the as left section of the Gas Calibration worksheet.
23.
Close the trigger
cals window and query data window.
24.
Save the Gas
calibration worksheet, and then print the CO and SO2 Response information and
fax to
CO/SO2 Audit and Calibration
Purpose: The CO/SO2 audit
and calibration assures that the CO and SO2 analyzers/systems have the correct
response. This can be accomplished by
introducing a known quantity of gas to the inlet and auditing the response on
the instrument. The terminology for this
type of audit is GRC (Gas Replacement Calibration). Each GRC has a RF (Response Factor). The RF value should be 1.00 +/- 2% when
complete.
Required Equipment:
Precision flat head screwdriver
CO Analyzer Zero Audit and Calibration
13.
Open
the Gas Calibration worksheet.
14.
In
Site Manager go to the Tools tab and select Trigger Cals.
15.
In
the Trigger Cals menu select CO Zero and press Start Calibration.
16.
Under
the Tools tab select Query 1-Minute Data.
In the Query DataTool menu select CO.
17.
Enter
the Background (BKG) number into gas calibration worksheet.
18.
To
find the BKG number on a 48iTL analyzers press the Menu button and scroll down
to Calibration Factors and press Enter.
Then scroll to CO BKG PPM and press Enter. The top number is the PPM (Parts Per Million) number for the analyzer and the bottom number
is the BKG number. (Note: The analyzer reads in PPM and the Site
Manager reads in PPB. If the analyzer is
0.500 PPM the Site Manager should read 500 PPB.)
19.
Wait
5 minutes for the CO number to be stable.
Press Get Data on the Query Data Tool.
If the query data numbers are larger or approximately equal to the
number on Site Manager then the data is stable and an average can be taken.
20.
Enter
the CO value into gas calibration worksheet if the CO Zero is not within
specification follow the steps below to calibrate.
21.
Turn
off CO Zero for 5 minutes for First Light to capture audit data point.
22.
To
calibrate turn on the CO Zero and wait 5 minutes for the CO number to be
stable. Press Get Data on the Query Data
Tool. If the query data numbers are
larger or approximately equal to the number on Site Manager then the data is
stable and an average can be taken.
23.
The
48CTL analyzer should already be in the adjustment screen (follow step 6). Use the up and down arrows to adjust the
Background number so that the Site Manager CO number is ~200 PPB or the
analyzer is ~0.200 PPM. When this is
complete press enter on the analyzer.
24.
Enter
the new Background (BKG) number into gas calibration worksheet.
25.
Enter
the new CO value into gas calibration worksheet.
26.
If
the BKG gives a warning that it has reached the limit and cannot be adjusted,
please see the section below, CO ANALYZER INITIAL S/R RATIO ADJUSTMENT, for a
procedure to bring the BKG back into adjustable limits.
27.
Press
Run or Auto on the analyzer and close the Trigger Cals Menu.
SO2 Analyzer Zero Audit and Calibration
1.
Open
the Gas Calibration worksheet.
2.
In
Site Manager, go to the Tools tab and select Trigger Cals.
3.
In
the Trigger Cals menu select CO/SO2 Zero and press Start Calibration.
4.
Under
the Tools tab select Query 1-Minute Data.
In the Query Data Tool menu select SO2.
5.
Enter the Background
(BKG) number into gas calibration worksheet.
To find the BKG number on a 43CTL analyzer scroll down to Calibration
Factors and press enter. Then scroll to SO2
BKG PPB and press enter. The top number
is the PPB (Parts Per Billion) number for the analyzer
and the bottom number is the BKG number.
6.
Wait
10 minutes for the SO2 number to be stable.
Press Get Data on the Query Data Tool.
If the query data numbers are larger or approximately equal to the
number on Site Manager then the data is stable and an average can be taken.
7.
Enter
the SO2 Zero value into gas calibration worksheet. If the result of the audit is out of
specification a calibration will be needed.
8.
Turn
off CO/SO2 Zero and wait for 5 minutes for First Light to capture data point.
9.
To
calibrate turn back on the CO/SO2 Zero, wait for 5 minutes to adjust the SO2
BKG value to get the SO2 Zero to be within specification. Once the value has been adjusted correctly,
wait 5 minutes for First Light to capture new data point. If you have a 43CTL analyzer it should
already be in the adjustment screen. Use
the up and down arrows to adjust the Background number so that the SO2 PPB number
is ~1.00. When this is complete press
Enter on the analyzer.
10. Enter the new Background (BKG) number into gas
calibration worksheet.
11.
Enter
the new SO2 zero value into gas calibration worksheet.
12.
On
the Query Data Tool press Get Data and enter the SO2 number in the As Left cell
of the Gas Calibration worksheet.
13.
Press
Run or Auto on the analyzer and close the Trigger Cals Menu.
CO/SO2 Analyzer Span Audit
1.
This
procedure will obtain the current RF value for the CO and SO2 analyzers.
2.
Open
the Gas Calibration Worksheet and enter the correct CO and SO2 concentrations
(found on the gas cylinder) in the blank provided.
3.
In
Site Manager go to the Tools tab and select Trigger Cals.
4.
In
the Trigger Cals menu, select CO/SO2 Zero and press Start Calibration.
5.
Under
the Tools tab select Query 1-Minute Data.
In the query data tool menu select Air MFC, Gas MFC, CO and SO2.
6.
Wait
10 minutes for the CO so it is not changing by more than 3 PPB per minute and
the SO2 isn’t changing by more than 0.05 PPB per minute. This is so that the instruments can equalize
before going on to the next step.
7.
Press
Get Data on the Query Data Tool. If the
query data numbers are approximately equal to the number on Site Manager then
the data is stable and an average can be taken.
8.
Enter the CO result in
the gas calibration worksheet.
9.
Enter
the SO2 result in the gas calibration worksheet.
10.
Go to
Trigger Cals and press Stop Calibration then select CO/SO2 GRC Point 1 and
press Start Calibration.
11.
Wait
10 minutes for CO and SO2 to be stable.
Press Get Data on the query data tool.
12.
Enter
the CO data into gas calibration worksheet.
13.
Enter
the AIR MFC, GAS MFC, the previous CO value from the CO/SO2 Zero
14.
Enter
the Air MFC, Gas MFC, CO and SO2 data in the As Found section of the Gas
Calibration worksheet. Also enter the
COEF and/or Span Pot number.
a.
To
find the COEF (Coefficient) on a 48iTL CO analyzers press the Menu button and
scroll down to Calibration Factors and press enter. Then scroll to CO COEF and press enter. The top number is the PPM (Parts Per Million) number for the analyzer and the bottom number
is the COEF number.
b.
To
find the COEF (Coefficient) number on a 43CTL analyzer scroll down to
Calibration Factors and press enter.
Then scroll to SO2 COEF and press enter.
The top number is the PPB (Parts Per Billion)
number for the analyzer and the bottom number is the COEF number.
15.
Go to
Trigger Cals and press Stop Calibration then select CO/SO2 Zero and press Start
Calibration.
16.
Wait
10 minutes for CO and SO2 to be stable.
Press Get Data on the query data tool.
17.
Enter
the Air MFC, CO and SO2 data in the As Found section of the Gas Calibration
worksheet.
18.
The
Actual Expected value is calculated by adding the final Zero Value and
Calculated Expected Value.
19.
The
RF is now displayed at the far right of the worksheet. If the RF is between 0.98 and 1.02, the
calibration is complete.
20.
Close
the Trigger Cals window and Query Data window.
21.
Save
the Gas Calibration Worksheet.
22.
If
either RF is not within the specified range continue with the Analyzer Span
Calibration.
CO/SO2 Analyzer Span Calibration
12.
This
procedure will be used to adjust the analyzers and obtain a corrected RF value
for the CO and SO2 analyzers.
13.
Using
the Ss Found data for the CO/SO2 Zero, enter the Air MFC, CO and SO2 values in
the As Left section.
14.
In
Site Manager go to the Tools tab and select Trigger Cals.
15.
In
the Trigger Cals menu, select CO/SO2 GRC Point 1 and press Start Calibration.
16.
Under
the Tools tab select Query 1-Minute Data.
In the Query Data Tool menu select Air MFC, Gas MFC, CO and SO2.
17.
Wait
10 minutes for CO and SO2 to be stable.
18.
Adjust
the instruments.
a.
On 48iTL
CO analyzers press menu button. Scroll
down to CAL FACTORS and press Enter. Go
to the CO COEF and press enter. The top
number is the PPM (Parts Per Million) number for the
analyzer and the bottom number is the COEF number. Use the up and down arrows to adjust the COEF
number so that the Site Manager CO PPB number approximately equal to the Actual
Expected value from the As Found section.
When this is complete press Enter on the analyzer.
b.
On
43CTL analyzers press menu. Scroll down
to CAL FACTORS and press ENTER. Go to
the SO2 COEF and press enter – Set the SO2 COEF to 1.0. The PMT can be adjusted by taking the top off
of the analyzer. With the top of the
analyzer off, look on the left side of the bulkhead at the front. There is a blue box with an orange grommet on
the top. Inside the grommet is the PMT
adjustment screw. Slowly adjust the
analyzer until the SO2 ppb on the analyzer, or SO2 on Site Manager, is approximately
equal to the Actual Expected value from the As Found section. The PMT adjustment screw on the inside of the
analyzer is a coarse adjustment and the SO2 COEF is a fine adjustment. The SO2 COEF should always be close to a
standard of 1.00 but it can be used to adjust the instrument to a tighter
tolerance. The SO2 COEF will adjust the
instrument in smaller increments than the PMT adjustment. Replace the top of the analyzer.
19.
When
the analyzer adjustments are complete, let the analyzers stabilize for 5
minutes. Press Get Data on the Query
Data Tool.
20.
Enter
the Air MFC, Gas MFC, CO and SO2 data in the As Found section of the Gas
Calibration worksheet. Also enter the
COEF.
21.
The
Actual Expected value is calculated by adding the final Zero Value and
Calculated Expected Value.
22.
The
RF is now displayed in the worksheet. If
the RF is between 0.98 and 1.02, the calibration adjustment is complete. If the RF is not within specification, repeat
the adjustment part of the procedure again.
23. Go to Trigger Cals and press Stop Calibration
then select CO/SO2 Zero and press Start Calibration.
24.
Wait
10 minutes for CO and SO2 to be stable.
Press Get Data on the query data tool.
25.
Enter
the Air MFC, CO and SO2 data in the As Left section of the Gas Calibration
worksheet.
26.
Close
the Trigger Cals window and Query Data window.
27.
Save
the Gas calibration worksheet.
CO Analyzer Initial S/R Ratio Adjustment
1.
From
the Main Menu, scroll down to INSTRUMENT CONTROL and press Enter.
2.
Scroll
down to SERVICE MOCE, and press the Enter key. Press Enter once again and wait
for the parameters to be saved.
3.
Press
the Menu key twice and scroll down to SERVICE and press enter.
4.
In
the SERVICE menu, scroll down to INITIAL S/R RATIO and press enter.
5.
You
will see values for CURRENT and INIT ZERO with the ability to edit. Use the up
or down arrow to make the INIT ZERO value as close as possible to the CURRENT
and press Enter to save the parameters.
6.
Once
these steps have been completed, go back to the Main Menu and scroll to
INSTRUMENT CONTROL and press Enter.
7.
Scroll
down to Service and press Enter. Press Enter once again and wait for the
parameters to be saved.
8.
Lastly,
go back and reset the BKG using the steps already outlined.