Honeywell SEARCHLINE EXCEL PLUS Guide De Démarrage Rapide page 7

3. Zero the receiver with the empty gassing test cell.
4. Apply the test gas to the gassing test cell. Avoid pressurising
the test cell. Wait for the receiver output to stabilise.
5. Check if the receiver output is as indicated in the table above,
±5% FSD.
6. Remove the test gas from the gassing test cell.
7. Remove the gassing test cell.
8. Re-zero the receiver.
Note
Field calibration is not supported. If result is not as expected contact
an authorized service centre.
(7)