Siemens GC..M.. Manual de instalación descargar pdf (Pagina 37)

Maxum II Initial Startup Procedures, Continued

Prepare Flame Detectors If Present

 For FID and FPD detectors, disable carrier gas flows and check fuel and air flows. The flows

must be measured separately. Leak check or adjust pressure setpoints if necessary. Record any

changes in pressure setpoints for inclusion in the EZChrom method later.

 Ignite the detectors. The MMI in the EPC screen will include a Detector Manual Ignite entry in the

list of digital outputs (valves, etc.) at the bottom of the screen. The level of abbreviation may

make this difficult to find. The more recent FIDs require the detector to be enabled so the 300V

bias is on, or it will not light (this can be done with the Enable Det or by viewing RT Chrom.)

Push the number corresponding to the Detector Manual Ignite and the detector will undergo it’s

ignite routine.

Alternatively,

press Home > 5 (Detectors and Realtime Chromatograms),

highlight the desired detector

and press the Ignite button at the bottom of the screen.

Establish Sample Flow to the Maxum II

Sample handling is where the process analysis starts. If the sample system is not functioning properly, it

is possible to have a condition in which the analyzer correctly analyzes the sample delivered to it, but that

sample does not adequately represent the composition of the process fluid. Also, inadequate filtration by

the sample system can shorten the life of the analyzer valves.

 Review sample system installation and startup procedures.

 Ensure the sample system has been properly pressure tested at this site.

 Ensure that all SSO (Sample Shut Off) and ARV (Atmospheric Reference Valves) are working

properly.

 Ensure that all sample system vents and drains are properly oriented.

WARNING All vent lines and oven exhaust should be vented outside the shelter. The vents

should be connected to a location where the pressure is atmospheric. Connection of oven or

analyzer vents to a variable pressure source such as a flare header should not be done as

chromatographic performance will be severely affected. Backpressure on the oven vent could

cause the T-rating of the instrument to be exceeded, which might become an ignition source.

Refer to the comments on Hazardous gases on page 3.

 Inspect the sample system to ensure it is in accordance with the sample system documentation.

 Circulate and purge process sample through the sample system for a short period of time before

applying to the analyzer. Ensure there is no vapor visible in liquid streams or liquid visible in

vapor streams at the bypass rotameters.

 Open the valve to the analyzer slipstream and allow sample flow to the analyzer.

Establish Communications with System Manager and EZChrom

 Refer to the section on assigning IP and network Mask Addresses and input the desired address

into the Maxum II.

 Launch System Manager on the workstation.

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Siemens GC..M.. Manual de instalación Pagina 37