102
MAN0530 Issue 10 - 11/09
Searchline Excel
2104M0506
An open path alarm set at 1 LEL.m would be triggered by any of the situations shown below:
100% 50%
10%LEL
LEL LEL
1m
2m
10m
LEL.m monitoring is particularly beneficial while the Excel gas detector is protecting the perimeter
of a plant or process, often reducing the quantity of point detectors required. The open path
LEL.m system has the ability to detect leaks that point detectors may miss due to prevailing
or changing wind directions, and can provide early warning of a dilute gas cloud when point
detectors may not register any gas presence.
B.3 ABBREVIATIONS
ATEX
European Hazadous Area Approval
CSA
Canadian Standards Association
DSP
Digital Signal Processor
EMC
Electro-Magnetic Compatibility
IAA
Instrument Assisted Alignment
IECEx
International Hazadous Area Approval
IP
Ingress Protection
IR
Infrared
IS
Intrinsically Safe
FM
Factory Mutual
LEL
Lower Explosive Limit
LR
Long Range
MR
Medium Range
NPT
National Pipe Thread
RFI
Radio Frequency Interference
SHC
Sieger Handheld Calibrator
SR
Short Range
UL
Underwriters Laboratories
APPENDIX B - GLOSSARY