Siemens GC..M.. Manual de instalación descargar pdf (Pagina 34)

Refer to the comments on Hazardous gases on page 3.

Maxum II Initial Startup Procedures,

Continued

 Continuing with the main power still off, open the

oven door and carefully remove all material, if

present. If columns were removed for shipment,

these should be installed in the oven.

 Check for any crimped or broken tubing.

 Finger test fittings to make sure they are tight.

Establish Utility Gas Flows

 Unblock the instrument air supply. If oven air

regulators are set to their setpoints, adjust them to 0

psig to turn off the oven heaters.

 Set Valve gas, if used, to the pressure specified in the Maxum II factory documentation. If valve

gas is not air, first open the valves on the cylinder providing the gas. Note: the Maxum II has a

shutdown program based on valve gas pressure. A pressure switch is set at a decreasing

setpoint of 100 psig (700 kPa.) If supply line pressure drops below this setpoint, analyzer mode is

set to hold, and all EPCs and heaters are disabled. EPCs and heaters must then be manually

enabled through the MMI before restarting the analyzer.

 Unblock the carrier gas and set the cylinder regulators at least 25 psi (175 kPa) above the factory

carrier gas setpoints.

 If used, unblock the flame detector fuel and air supplies and set the cylinder regulators at least 25

psi (175 kPa) above the factory setpoints.

Establish Power to the Maxum II

 Turn on power to the Maxum II. Wait for the system to boot up.

 On the MMI, the system boots up to the Monitor menu. Select the Maintenance menu by pressing

Select menu > 2.

 In the Maintenance menu, press 8 > 6 to display the EPCs.

Leak Check the Column Oven Connections

 Confirm the EPCs are enabled and that the pressure indicated

matches the setpoint.

 Use a foaming liquid leak detector and leak test the fittings in the

oven. Do not use a foaming liquid detector on connections made with

fused silica capillary columns; instead, use isopropyl alcohol.

 Tighten any leaking fitting with the appropriate wrench until no leaks

are detected.

 Clean up any excess leak check fluid with absorbent paper towels.

 Check sample line(s) by blocking return or vent line and pressuring

with air or non-combustible and non-toxic gas to check for sample line

leaks in the oven.

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Siemens GC..M.. Manual de instalación Pagina 34