Model NGA2000 HFID

Instruction Manual

748297-E June 2003

SECTION 2

INSTALLATION

2-1 UNPACKING

Carefully examine the shipping carton and contents for signs of damage. Immediately notify the shipping carrier if the carton or its contents are damaged. Retain the carton and packing material until the instrument is operational.

2-2 ASSEMBLY

If the Analyzer Module requires assembly with other components, do so at this time.

Connect the network cable to either the NETWORK 1 or NETWORK 2 connection on the Analyzer Module. Connect the power cable to the Analyzer Module front panel and an electrical +24VDC power supply.

2-3 LOCATION

Install the Analyzer Module in a clean, weather-proofed, non-hazardous, vibration-free location free from extreme temperature varia- tions. For best results, install the Analyzer Module near the sample stream to minimize sample transport time.

WARNING

INSTALLATION RESTRICTIONS

For safety, the Analyzer Module should be installed in a non-confined, ventilated space. Do not block any of the rear panel outlets as they are part of the safety system.

Operating ambient temperature is 15°C to

35°C, limited to temperature changes of less than 10°C/hr. Acceptable dew point range is less than 95% relative humidity, but not in excess of 45°C wet bulb temperature.

The cylinders of fuel, air, and calibration gas(es) and the source of purge and regulated air

should be located in an area of relatively constant ambient temperature.

2-4 GASES

a.Overview

During normal operation, the Analyzer Module requires fuel and air to maintain the burner flame as well as suitable standard gases for calibration and in- strument air for purge requirements. In addition, instrument air for regulated air in is required to control the sample pressure at the sample capillary. Crite- ria for selection of these gases follow in this section.

After initial startup or after startup fol- lowing a prolonged shutdown, the ana- lyzer may display baseline drift for a considerable period of time, particularly on the most sensitive range. Com- monly, the drift is caused by small amounts of hydrocarbons in the inner walls of the tubing in both the internal flow system and the external gas supply system. Drift results from any factor in- fluencing the equilibrium of these ab- sorbed hydrocarbons, such as temperature or pressure.

Note that this type of drift occurs only when the flame is burning. If drift occurs when the flame is extinguished, the electronic circuitry is at fault. To mini- mize drift, use clean fuel and air, keep the analyzer clean, and locate the gas cylinders in an area of relatively con- stant ambient temperature.

The cylinders supplying all gases each should be equipped with a clean, hy- drocarbon-free, two-stage regulator and a shutoff valve.

Rosemount Analytical Inc. A Division of Emerson Process Management

Installation

2-1