11066 Searchpoint Optima Plus v2.indd - Merkantile

MAN0551.P65 Issue 06 - 03/042108M05015. COMMISSIONING5.3.4 Final Commissioning (Multimeter)The commissioning process is finished off as describedbelow:-(1) Remove or disconnect any gas testing equipment fromthe unit.(2) Ensure that any test gas used is fully vented from themeasurement chamber or gassing cell. (If the remotegassing cell has been used, ensure that once vented,it’s inlet tubes are sealed with the protective capsprovided (or a suitable alternative).)(3) Verify that after the initialisation and stabilisation period(approximately 1 minute), the 4-20mA output returns to4mA nominal (between 3.8mA and 4.2mA).(4) Remove power from the unit and disconnect themultimeter from the 4-20mA loop. Connect the white 4-20mA wire back directly to the loop terminal. Re-applypower to the unit.(5) Verify that the unit returns to ACTIVE status and thatthe gas reading displayed on the control card is 0.0%LEL.(6) Replace the junction box lid.(7) When all of the relevant steps above are completedsatisfactorily, the unit has been commissioned and isready for operational use.51