Siemens GC..M.. Manual de instalación descargar pdf (Pagina 7)

Site Considerations, Continued

When the Maxum II contains an air bath oven, it will vent in excess of 3 SCFM (85 liters per minute) of

heated air through the oven exhaust. See note below for the recommended approach.

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.

Installation of the unit with a combustible gas coming into the EPC requires that a restriction be placed on

the flow into the Maxum II. This is required to limit the flow of the combustible gas into the unit. The

recommendation is to limit the flow prior to entry into the shelter.

WARNING The Maxum II will be tagged for flow restriction of combustible gases into the

Electronic Pressure Controller. The user/installer must ensure that this flow restriction is

implemented to permit safe operation of the unit.

Intended Use

The Maxum edition II gas chromatograph is used in all branches of the fine chemicals, refining and

hydrocarbon processing industries. It performs chemical composition analysis of gases and liquids that

are present in all phases of production. The Maxum II is built for installation in harsh environments either

directly or nearby in at-line process measurement laboratories. Its application flexibility allows it to

analyze samples of feedstock, partially processed streams, final products and process byproducts

including wastes and environmental hazards.

This product is intended to be used only in conjunction with other devices and components which have

been recommended and approved by Siemens. Appropriate safety standards were used in the

development, manufacture, testing, and documentation of the Maxum II. Under normal operation, this

product is safe for use providing that all safety and handling guidelines are observed with respect to

configuration, assembly, approved use, and maintenance. This device has been designed such that safe

isolation is guaranteed between high and low voltage circuits. Low voltages which are connected must

also be generated using safe isolation.

If any part of the Maxum II is opened, certain parts of the device are accessible which may carry

dangerous voltages. Therefore, only suitably qualified personnel may work on this device as indicated in

the next section which is titled “Qualified Personnel”.

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Siemens GC..M.. Manual de instalación Pagina 7