Oldham OLCT 20, User Manual

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Table of Contents iii
Table of Contents
| Overview.............................................................. 1
Limitation of Liability .........................................................................................1
Ownership clauses ...........................................................................................1
Warnings ...........................................................................................................1
Warranty ...........................................................................................................2
Important Information ........................................................................................2
Destruction of equipment ..................................................................................2
Symbols used ...................................................................................................3
| Description .......................................................... 5
Overview ...........................................................................................................5
Main characteristics of the various versions .....................................................5
Mechanical installation of the various versions ................................................6
| Wiring Arrangements ......................................... 7
3-wire version (OLC 20d, OLCT 20d) ...............................................................7
2-wire version (OLCT 20d) ...............................................................................7
2-wire Intrinsic Safety version (OLCT 20i) ........................................................8
| Installation ........................................................... 9
Regulations and operating conditions ..............................................................9
Equipment required ..........................................................................................9
Positioning the detector ....................................................................................9
Mounting the detector .................................................................................... 10
| Maintenance ...................................................... 11
Maintenance frequency ................................................................................. 11
Detector OLC 20 ............................................................................................ 12
Transmitters OLCT 20 ................................................................................... 12
Replacing a sensor on OLCT 20 ................................................................... 14
| Spare Parts ........................................................ 15
Flameproof approved replacement sensors .................................................. 15
Intrinsically-safe approved replacement sensors .......................................... 16
| Accessories ...................................................... 17
| Technical Specifications .................................. 19
Common ........................................................................................................ 19
OLC 20d ........................................................................................................ 19
OLCT 20d ...................................................................................................... 19
OLCT 20i ....................................................................................................... 19
Sensors .......................................................................................................... 20
Cross gas factors for combustible gases ....................................................... 21