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MAN0530 Issue 10 - 11/09
2104M0506
For the Ethylene version of Excel, the following gas concentrations are suggested
Gas type
Ethylene
Propylene
Butadiene
To get the best accuracy when using the gassing cell:
(1)
Connect the gassing cell to the Searchline Excel.
(2)
Zero Searchline Excel with the empty gassing cell.
(3)
Apply the test gas to the gassing cell and allow sufficient time to fully flush the cell without
pressurising it and check that the Searchline Excel output stabilises.
(4)
Check the Searchline Excel output is as indicated in the above table ±5% fsd.
(5)
Remove the gassing cell.
(6)
Re-zero Searchline Excel.
Note: Pentane cannot be used with the gassing cell. At normal temperatures, these substances
do not vapourise sufficiently to give a useful signal in the short path of the gassing cell.
4.4 DISPLAY GAS READING
This procedure displays details about the current gas/gas table. Carry out the following
procedure:
(1)
Connect the SHC1 Handheld Interrogator to the gas detector.
See Connecting the Interrogator to the Searchline Excel Gas Detector in section
3.7.6.
(2)
Switch on the SHC1 Handheld Interrogator.
See Powering Up in section 3.7.6.
(3)
Select DISPLAY from the Main menu by pressing the
keypad to navigate through the menu options.
(4)
Press
on the Interrogator keypad to display the Display menu.
(5)
Select GAS READING from the Display menu.
(6)
Press
on the keypad.
A display similar to the following is now displayed.
4. MAINTENANCE
LEL
Concentration
applied
2.7%
54%
2.0%
50%
2.1%
42%
WARNING
These gases are flammable and/or toxic.
Take appropriate precautions when handling.
Calculated
Response
3 LELm
3.75 LELm
3 LELm
(up) and
58
Searchline Excel
4-20mA output
13.6mA
16mA
13.6mA
(down) keys on the
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