Instruction Manual

245364-V May 2002

Model 755A

f.Corrosive Gases

In applications where the sample stream contains corrosive gases, a complete drying of the sample is desirable, as most of these gases are practically inert when totally dry.

For corrosive applications, consult the factory.

WARNING

RADIOACTIVE SAMPLE GASES

Radioactive sample gases require the stainless steel tubing option.

Leaks must be corrected before introduction of flammable sample and/or application of electrical power. Liberally cover all fittings, seals, and other possible sources of leakage with a suitable leak test liquid such as SNOOP (PN 837801). Bubbling or foaming indicates leakage. Checking for bubbles will locate most leaks but could miss some because some are inaccessible to application of SNOOP. For positive assurance that system is leak-free, use the flow stoppage test.

2-7 LEAK TEST

WARNING

POSSIBLE EXPLOSION HAZARD

This analyzer is of the type capable of analysis of sample gases which may be flammable. If used for analysis of such gases, the instrument must be either in an explosion-proof enclosure suitable for the gas, or, protected by a continuous dilution purge system in accordance with Standard ANSI/NFPA-496 (Chapter 8) or IEC Publication 79-2-1983 (Section Three)

If explosive gases are introduced into this analyzer, the sample containment system must be carefully leak-checked upon installation and before initial start-up, during routine maintenance and any time the integrity of the sample containment system is broken, to ensure the system is in leak-proof condition.

Internal leaks resulting from failure to observe these precautions could result in an explosion causing death, personal injury and/or property damage.

Supply air or inert gas, such as nitrogen, at 10 psig (69 kPa) to analyzer via a flow indicator with range of 0 to 250 cc/min. Set flow at 125 cc/min. Plug sample outlet. Flow reading should drop to zero. If not, system is leaking.

2-10 Installation

Rosemount Analytical Inc. A Division of Emerson Process Management