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MAN0530 Issue 10 - 11/09 Searchline Excel
2104M0506
For the Ethylene version of Excel, the following gas concentrations are suggested
Gas type LEL Concentration Calculated 4-20mA output
applied Response
Ethylene 2.7% 54% 3 LELm 13.6mA
Propylene 2.0% 50% 3.75 LELm 16mA
Butadiene 2.1% 42% 3 LELm 13.6mA
WARNING
Thesegasesareammableand/ortoxic.
Take appropriate precautions when handling.
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) Applythetestgastothegassingcellandallowsufcienttimetofullyushthecellwithout
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 sufciently 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 (up) and (down) keys on 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
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