Rosemount 755, Инструкция по эксплуатации

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M
ODEL
755 O
XYGEN
A
NALYZER
2-16
748183-H Rosemount Analytical
November 1997
Leakage must be corrected before introduction of flammable sample or application of
electrical power. Liberally cover all fittings, seals, and other possible sources of
leakage with suitable leak test liquid such as Snoop (P/N 837801). Bubbling or
foaming indicates leakage. Checking for bubbles will locate most leaks but could miss
some because some areas are inaccessible to application of Snoop. For positive
assurance that system is leak-free, use the flow stoppage test.
2.8 PURGE KIT (OPTIONAL)
The optional 643108 Purge Kit is designed to equip the Model 755 General Purpose
enclosure with Type Z Air Purge per National Fire Protection Association Standard
NFPA 496-1986, Chapter Two. The kit, along with user-supplied components, when
installed as described in these instructions, is designed to reduce the classification
within the enclosure from Division 2 (normally non-hazardous) to non-hazardous.
The general purpose Model 755 Oxygen Analyzer, catalog number 191102, is for
operation in non-hazardous locations. It is of a type capable of analysis of
sample gases which may be flammable. If used for analysis of such gases, the
instrument must be protected by a continuous dilution purge system in
accordance with Standard ANSI/NFPA-496-1086 (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 leakage of sample resulting from failure to observe these precautions
could result in an explosion causing death, personal injury, or property damage.
This kit is designed only for protection against the invasion of flammable gases into the
enclosure from the outside atmosphere. It does not cover protection from possible
abnormal release (leakage) of flammable gases intentionally introduced into the
enclosure.
This kit consists of the following items:
PART NO. DESCRIPTION
190697 Purge Inlet Fitting
045835 Purge Outlet Fitting
002787 Warning label
856156 Sealant (Duxseal)
Note: To conform to NFPA Type Z requirements, the warning label must be
applied to the analyzer front cover. If the analyzer is ordered factory equipped
with purge kit, this label is applied at the factory.
WARNING: POSSIBLE EXPLOSION HAZARD