ABB MEASUREMENT & ANALYTICS PGC5000 Process gas chromatograph

3  Introduction

PGC5000 Series Service Instructions

3.4.1 Liquid version

The liquid version incorporates a liquid sample valve (LSV) as the input to the analysis.    The duration of an analysis depends on

the application and consists of the following:

• The liquid sample valve injects a fixed volume of sample into a vaporizing chamber.

• “Sweep gas” transports sample out of the vaporizing chamber.

• Carrier transports the vaporized sample into the column.

• The column then separates the components and passes them into the detector.

• The detector measures the sample across the range of high to low concentration.

The liquid sample valve is externally mounted on the right side of the Oven Compartment and extends through the isothermal

oven, allowing direct injection.    It is actuated by a solenoid valve located in the Oven Electronics Compartment.    The liquid

sample valve captures a specific volume of liquid sample below its bubble point, injects it into a temperature controlled

(vaporizing) chamber of the LSV, which then sends the vaporized sample into the oven.

3.4.2  Vapor version

The vapor version has a vapor input to the analysis, so it does not require a liquid sample valve.    The duration of an analysis

cycle depends on the applications and consists of the following:

• Carrier gas transports the vaporized sample through the columns.

• The column then separates the components and passes them into the detector.

• The detector measures the sample across the range of high to low concentration.

3.5  Class C oven

The Class C Oven contains the same components as the Class B Oven, but it has the capability to handle more oven

components.    The Class C Oven has a maximum of two detectors and a maximum of six valves.

3.6  Air purge systems

The analyzer is suitable for a Class 1 Division 2 hazardous location, or an Ex Zone 2 area, without purge and pressurization

protection.    Purge and pressurization protection of the electronics enclosure is required for a Class 1 Division 1 location, or an

Ex Zone 1 area.    Refer to the analyzer nameplate for purge and pressurization specifications.

3.7  System variations

This manual supports the basic PGC5000 analyzer.    An appendix to the main manual presents additional instruction for special

applications such as PGC5000TPGC (temperature programmed GC), PGC5007 (fuel sulfur GC), and PGC5009 (fast GC).