Oldham OLCT 60 User manual

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

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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.

1 - Overview
11
Composition of the Detector
OLCT 60 detectors contain the following parts:
Id.
Description
1.
Label
2.
Cover
3.
Display board
4.
Terminal board
5.
On-board sensor
6.
Enclosure
7.
M25 cable gland (until August 2014)
8.
Remote sensor
9.
Cable for remote sensor
10.
Adapter
11.
On-board OLCT IR infrared sensor
12.
Remote OLCT IR infrared transmitter
004
Figure 1: Main components of OLCT 60 detectors

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OLCT 60
User manual
External view
Overview
Id.
Description
1.
Digital display. See Figure 3 for more details.
2.
Ground terminal
3.
Cover fixation screw
4.
Cable gland (until August 2014)
5.
On-board sensor. See 9 for more details.
6.
Remote sensor. See 9 for more details.
7.
On-board OLCT IR infrared sensor head. See 9 for more details.
8.
Remote OLCT IR infrared transmitter. See 9 for more details.
012A
OLCT 60 OLCT 60D with remote sensor block
012B
OLCT 60/OLCT IR on-board OLCT 60/OLCT IR remote
012
Figure 2: OLCT 60 overview

1 - Overview
13
Difference between FLP and IS sensors
Although they have different ATEX marking, intrinsically safe and flameproof sensors
are distinguished by the color of the sensor block as following:
Flameproof sensor: unpainted stainless steel enclosure equipped with a flame
arrestor,
Intrinsically safe sensor: blue painted stainless steel enclosure equipped a PTFE
membrane.
Display and LEDs
Id.
Description
1.
Digital display indicates:
- Gas concentration and gas type alternately with gas unit. If an error occurs, the
respective error code is displayed and Fault LED is lit on. Please revert to section
Readings on the display, page 16.
- Maintenance menus. Please revert to section Menus, page 16.
2.
Magnetic switch
3.
Fault LED (orange)
4.
Power LED (green)
5.
Magnetic switch
6.
Magnetic wand
018
Figure 3: General Status Screen

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OLCT 60
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Internal view
Id.
Description
1.
Electronic circuit board
2.
Terminal block
006
Figure 4: Detector internal view (with display board removed)
Labels and pictograms
The detector has two identification labels, as shown below:
Certification label
Id.
Description
008
Figure 5: Certification label
1.
ATEX marking
2.
Type of product
3.
Manufacturer's name
4.
IECEx marking and ATEX certification
temperature range (is not the operating
temperature range)
5.
Warning
6.
CE and ATEX marking

1 - Overview
15
P/N label
This label is located on the side of the enclosure and contains the following
information:
Id.
Description
010
Figure 6: Side label
1.
Part Number of the OLCT 60 without
sensor
2.
Disposal icon
3.
Serial Number
Visual indication
At startup
Display shows:
Initialization screen. All LCD segments and LEDs
turn on
L_00
Firmware version
L_02
Batch number
L_04
Serial Number
L_06
Gas concentration reading once initialization and
stabilization are completed
L_008
Figure 7: Warm-up screen

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OLCT 60
User manual
In normal operation
In normal operation, the display alternately shows the gas concentration, the type of
gas and the gas unit. The OK green indicator is lit on; the FAULT indicator is turned off.
Indicator
Lit
Off
OK
OLCT 60 is powered
OLCT 60 is not powered
FAULT
Detector in fault or in maintenance
mode
See Fault mode screen
Normal Operation
L_010A
L_010B
Figure 8: OLCT 60 in normal operating mode
Fault mode screen
The display indicates DEF or the fault code (see page 73 for more warning code
information). Simultaneously, the FAULT indicator lights on and the icon is
displayed.
L_014A
L_014B
Figure 9: OLCT 60 in fault mode
Maintenance Menus
Access
You can access the menus without opening the
enclosure thanks to a magnet (rep. 1) that must
be placed over (rep. 2).
034
Figure 10: place the magnet over
‘VALID’to access the menus

1 - Overview
17
Gas calibration menu
The menu is different depending on whether the OLCT 60 is equipped with an OLCT
IR infrared sensor.
L_022_A
Normal operating mode
(page 31)
(page 42)
(page 39)
(page 47)
L_022B
Figure 11: Gas calibration menu (on the right: OLCT 60 equipped with an OLCT IR
infrared sensor)
•CAL: zero and span calibration. See page 42.
•Init: sensor replacement. See page 40.
•Ir-0: OLCT IR zeroing. See page 47.

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OLCT 60
User manual

2 - Installation
19
Chapter 2 | Installation
Please read the guidelines on the installation, use and maintenance of
detectors for detection of flammable gases and oxygen (standard EN/IEC
60079-29-2) and toxic gases (standard EN 45544-4).
Regulations and conditions of use
The installation will be done according to current standards for installation in
explosive areas especially regulations IEC/EN 60079-14 and IEC/EN 60079-17
(current editions) or according to other national standards.
The equipment is authorized for use in Zones 1, 2, 21 and 22 and is certified for
ambient temperatures from -20 °C to + 60 °C. Note that this is not the operating
temperature which, by the way, is sensor dependent.
Regarding the OLCT 60D-id version, the remote sensor can be used in zones 0, 1,
2, 20, 21 and 22. The transmitter itself is for use in zones 1, 2, 21 and 22 only.
The detector must always be in contact with the ambient air. Thus:
- Do not cover the sensor,
- Do not paint the sensor,
- Avoid dust deposits.
Necessary equipment
•Complete detector assembly
•Cable
•Tools
•Fixing hardware
•Multimeter (intrinsically safe certified when needed)
Location of the detector
Depending on the density of the gas to be detected or the application, the detector
shall be positioned at ground level, or on the ceiling at the same height as the airflow,
or near air extraction ducts. Heavy gases may be detected at the ground level, while
light gases will be found at ceiling height. Gas densities are found on page 48.

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OLCT 60
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Detector positioning
All versions excluding OLCT IR
The OLCT 60 will be installed with the sensor pointing downwards. Any tilt of more
than 45° from the vertical will lead to an inaccurate measurement.
Fixing the enclosure will be performed by using 2 x M6 screws and the appropriate
plugs for the supporting material. A special holder is available for mounting the detector
on the ceiling (see chapter Accessories).
016
Figure 12: installation of an OLCT 60 with on-board sensor
036
Figure 13: installation of an OLCT 60D with remote sensor
OLCT 60 with local or remote OLCT IR
The infrared sensor shall be installed horizontally with the arrow on the splashguard
pointing upwards.