Oldham OLCT 60 User manual

OLCT 60
User manual
Part Number: NPO60GB
Revision: D.2
Fixed Point
Gas Monitor
The Fixed Gas Detection Experts

2
OLCT 60
User manual
Copyright June 2018 by Oldham S.A.S.
All rights reserved. No reproduction of all or part of this document, in any
form, is permitted without the written consent of Oldham S.A.S..
All of the information that is provided in this document is accurate to the best
of our knowledge.
As a result of continuous research and development, the specifications of
this product may be changed without prior notice.
Oldham S.A.S.
Rue Orfila
Z.I. Est –C.S. 20417
F –62027 ARRAS Cedex
Tel: [phone]
Fax: [phone]

Contents
3
Contents
Chapter 1 | Overview 9
Purpose........................................................................................................ 9
Operating principle.....................................................................................10
Composition of the Detector.......................................................................11
External view..............................................................................................12
Internal view...............................................................................................14
Labels and pictograms...............................................................................14
Visual indication .........................................................................................15
Chapter 2 | Installation 19
Regulations and conditions of use.............................................................19
Necessary equipment ................................................................................ 19
Location of the detector..............................................................................19
Detector positioning ...................................................................................20
Electrical Specifications .............................................................................22
Connecting cable .......................................................................................22
Cable connection .......................................................................................23
Scope of use ..............................................................................................27
Transfer curve............................................................................................27
Chapter 3 | Commissioning and operating modes 29
Purpose of control......................................................................................29
Necessary equipment ................................................................................ 29
Commissioning...........................................................................................30
Stabilization time........................................................................................30
Display of the gas measurement................................................................31
Checking Zero............................................................................................32
Checking gas sensitivity.............................................................................33
Chapter 4 | Preventive maintenance 35
Maintenance schedule ............................................................................... 35
Actions........................................................................................................36
Chapter 5 | Maintenance 37
Possible errors ...........................................................................................37
Replacing sensor block (Explo, O2, Tox, XPIR).........................................38
Replacing the OLCT IR –integrated version.............................................39

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OLCT 60
User manual
Replacing the OLCT IR –remote version..................................................39
Initialization of the sensor block.................................................................40
Zeroing and sensitivity adjustment (calibration).........................................42
Adjusting the optical zero (Ir-0)..................................................................47
Applicable coefficients for explosive gas calibration..................................49
Checking the line current ...........................................................................52
Chapter 6 | Accessories 53
Chapter 7 | Spare parts 55
Explosionproof sensor block......................................................................55
Intrinsically safe sensors............................................................................57
Chapter 8 | Declaration of EU Conformity 59
Chapter 9 | Technical Specifications 63
Dimensional characteristics .......................................................................63
Complete detector......................................................................................65
Measuring sensors.....................................................................................67
Chapter 10 | Special instructions for use in explosive
environments and functional safety 69
General comments..................................................................................... 69
Metrological performance for the detection of flammable gases or
oxygen........................................................................................................69
Threaded joints...........................................................................................70
Functional Safety .......................................................................................70
Reliability data............................................................................................ 70
Chapter 11 | Fault and error codes 73
Errors (E xx)...............................................................................................73
Faults (dEF xx)...........................................................................................73

Limitation of Liability
5
Thank you for choosing this OLDHAM instrument.
All of the necessary actions have been taken to ensure your complete satisfaction with
this equipment.
It is important that you read this entire manual carefully and thoroughly.
Limitation of Liability
OLDHAM shall not be held responsible for any damage to the equipment or for any
physical injury or death resulting in whole or in part from the inappropriate use or
installation of the equipment, non-compliance with any and all instructions,
warnings, standards and/or regulations in force.
No business, person or legal entity may assume responsibility on behalf of
OLDHAM, even though they may be involved in the sale of OLDHAM products.
OLDHAM shall not be responsible for any direct or indirect damage, or any direct or
indirect consequence, resulting from the sale and use of any of its products
UNLESS SUCH PRODUCTS HAVE BEEN SELECTED BY OLDHAM
ACCORDING TO THE APPLICATION.
Ownership clauses
The drawings, specifications, and information herein contain confidential
information that is the property of OLDHAM.
This information shall not, either in whole or in part, by physical, electronic, or any
other means whatsoever, be reproduced, copied, divulged, translated, or used as
the basis for the manufacture or sale of OLDHAM equipment, or for any other
reason without the prior written consent of OLDHAM.

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OLCT 60
User manual
Warnings
This is not a contractual document. In the best interest of its customers and with the
aim of improving performance, OLDHAM reserves the right to alter the technical
features of its equipment without prior notice.
READ THESE INSTRUCTIONS CAREFULLY BEFORE THE FIRST USAGE:
these instructions should be read by all persons who have or will have responsibility
for the use, maintenance, or repair of the instrument.
This instrument shall only be deemed to be in conformance with the published
performance if used, maintained, and repaired in accordance with the instructions
of OLDHAM, by OLDHAM personnel, or by personnel authorized by OLDHAM.
Important Information
The modification of the material and the use of parts of an unspecified origin shall
entail the cancellation of any form of warranty.
The use of the unit has been projected for the applications specified in the technical
characteristics. Exceeding the indicated values cannot in any case be authorized.
Catalytic sensors are susceptible to poisoning by traces of several substances. This
leads to an inhibition which can be permanent or temporary depending on the
contaminant, the concentration of the contaminant, the duration of exposure to the
contaminant.
Poisoning may result from exposure to substances as:
silicones (e.g. waterproofing, adhesives, release agents, special oils and greases,
certain medical products, commercial cleaning agents)
tetraethyl lead (e.g. leaded petrol, particularly aviation petrol ‘Avgas’)
sulfur compounds (sulfur dioxide, hydrogen sulfide)
halogenated compounds (R134a, HFO, etc.)
organo-phosphorus compounds (e.g. herbicides, insecticides, and phosphate
esters in fireproof hydraulic fluids
Oldham recommends regular testing of fixed gas detection installations (read
Chapter 4 | Preventive maintenance).
Warranty
Under normal conditions of use and on return to the factory, parts and workmanship
are guaranteed for 2 years, excluding consumables such as sensors, filters, etc.

Limitation of Liability
7
Disposal of the equipment
European Union only. This symbol indicates that, in conformity with
DEEE Directive (2002/96/EC) and according to local regulations, this
product may not be discarded together with household waste.
It must be disposed of in a collection area that is set aside for this purpose, for example
at a site that is officially designated for the recycling of electrical and electronic
equipment (EEE) or a point of exchange for authorized products in the event of the
acquisition of a new product of the same type.

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OLCT 60
User manual

1 - Overview
9
Chapter 1 | Overview
Purpose
OLCT 60 gas detectors are 4-20mA and 3-wire transmitters designed for measuring
combustible and toxic gases as well as oxygen.
OLCT 60 is available in two versions:
Flameproof certified enclosure along with flameproof certified sensor block. This
version is listed as OLCT 60d.
Flameproof certified enclosure along with intrinsically safe certified sensor block.
This version is available for electrochemical sensors only. This version is listed as
OLCT 60id.
Available versions are listed below.
OLCT 60d
OLCT 60id
Catalytic sensor
Electrochemical sensor
XPIR Infrared sensor
OLCT IR Infrared sensor
Table 1: Comparison of OLCT 60 detectors
Each version features two options:
OLCT 60 version with on-board sensor. The sensor can either be flameproof or
intrinsically safe certified depending on the version of the detector.
OLCT 60D version with remote sensor. The sensor can either be flameproof or
intrinsically safe certified depending on the version of the detector.

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OLCT 60
User manual
Available combinations are listed below.
Name
Description
Illustration
OLCT 60
Flameproof enclosure with on-
board sensor (FLP or IS*).
044
OLCT 60D
Flameproof enclosure with remote
sensor 15m (FLP or IS*).
046
OLCT 60
/ OLCT IR
Flameproof enclosure with on-
board infrared sensor type OLCT
IR.
048
OLCT 60D
/ OLCT IR
Flameproof enclosure with remote
infrared transmitter type OLCT IR.
050
(*) FLP stands for flameproof, IS stands for intrinsically safe. The IS version is distinguished - among other
features - by the color of its housing which is blue. FLP versions are unpainted stainless steel.
Operating principle
The sensor converts the target gas into current. The current value is amplified,
temperature compensated, linearized, and converted to a 4-20 mA signal proportional
to the gas concentration and then conveyed through a connecting cable to a
centralization system (gas controller or PLC).
Sensor type depends on the gas to be detected and the version of OLCT 60 as shown
in Table 1: Comparison of OLCT 60 detectors on page 9.