Oldham OLC 100 User manual

OLC/OLCT 100
USER MANUAL
Gas Detector
Part Number: NPO100GB
Revision: F.1
The Fixed Gas Detection Experts

2
OLC(T) 100
User manual
Copyright 2013 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 –CS 20417
F–62027 ARRAS Cedex
Tel.: [phone]
Fax: [phone]

Content
3
Contents
Chapter 1 | Presentation.........................................................7
Purpose......................................................................................................7
Operating principle.....................................................................................7
Composition of the detector.......................................................................8
Internal elements........................................................................................9
Identifiers..................................................................................................10
Chapter 2 | Ranges ...............................................................11
OLC 100 and OLCT 100 ranges..............................................................11
Chapter 3 | Installation .........................................................13
Regulations and conditions of use...........................................................13
Necessary equipment ..............................................................................13
Electrical power supply ............................................................................14
Location of the detector............................................................................14
Detector positioning .................................................................................14
Connector cable.......................................................................................15
Cable connection .....................................................................................16
Chapter 4 | Calibration..........................................................21
Necessary equipment ..............................................................................21
Commissioning.........................................................................................21
Stabilization time......................................................................................22
Calibrating the OLC 100...........................................................................23
Calibrating the OLCT 100 ........................................................................25
Chapter 5 | Preventive maintenance....................................31
Frequency of maintenance ......................................................................31
Actions......................................................................................................32
Chapter 6 | Maintenance.......................................................33
Opening the cover....................................................................................33
Checking the current generator ...............................................................34
Possible errors .........................................................................................35
Replacing sensor block............................................................................37

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OLC(T) 100
User manual
Chapter 7 | Accessories .......................................................39
Cable gland..............................................................................................42
Chapter 8 | Spare parts.........................................................43
Chapter 9 | Declarations of EC conformity..........................45
Chapter 10 | Technical specifications..................................53
Dimensional characteristics .....................................................................53
General Specifications .............................................................................54
Catalytic sensor (OLCT 100 XP)..............................................................55
Semiconductor sensors (OLCT 100 XP)..................................................59
Infrared sensors (OLCT 100 XP-IR) ........................................................60
Chapter 11 | Specific instructions for use in explosive
atmospheres and operational safety........................................61
General comments...................................................................................61
Cable Entries............................................................................................62
Threaded joints.........................................................................................62
Metrological performance for the detection of flammable gases .............62
Transfer curve..........................................................................................63
Scope of use ............................................................................................63
Functional safety......................................................................................64
Reliability data..........................................................................................64
Special conditions of use .........................................................................65
Appendix | Ordering information.........................................67
Gas List....................................................................................................67

5
Thank you for choosing this OLDHAM instrument.
All of the necessary actions have been taken in order to ensure your complete
satisfaction with this equipment.
It is important that you read this entire manual carefully and thoroughly.
The extent of our responsibility
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, installation, or storage of the equipment, which is the result of not
complying with the instructions and warnings, and/or with the standards and
regulations in force.
OLDHAM does not support or authorise any business, person, or legal entity in
assuming responsibility on behalf of OLDHAM, even though they may be
involved in the sale of OLDHAM products.
OLDHAM shall not be responsible for any damage, direct or indirect, or for
damages and interest, direct or indirect, resulting from the sale and use of any
of its products UNLESS SUCH PRODUCTS HAVE BEEN DEFINED AND
CHOSEN BY OLDHAM FOR THE USE THAT THEY ARE INTENDED.
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 consent of OLDHAM.

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OLC(T) 100
User manual
Warning
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 authorised by
OLDHAM.
Guarantee
Under normal conditions of use and on return to the factory, parts and
workmanship are guaranteed for 3 years, excluding such consumables as
sensors, filters, etc.
Destruction of the equipment
European Union (and EEA) only. This symbol indicates that, in
conformity with directive DEEE (2002/96/CE) 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 as before.

1 - Presentation
7
Chapter 1 | Presentation
Purpose
This range of sensors is designed to detect a particular gas depending on the type
of sensor used.
Operating principle
The measurement sensor converts the target gas into voltage or current. This
electrical parameter is:
either conducted directly via a connecting cable to a dedicated central
measurement unit (as with the OLC 100 explosimeter) that operates on the
principle of the Wheatstone bridge. Such a measurement unit is available in
the OLDHAM range.
or amplified, corrected for temperature, linearised, and converted to a 4-20 mA
signal (as for the OLCT 100) and conducted via a connecting cable to a
centralized unit (measurement unit or industrial automation system).

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OLC(T) 100
User manual
Composition of the detector
A detector comprises the following elements:
Id.
Description
1.
Company label
2.
Cover
3.
PCB protector (for OLCT version).
4.
PCB.
5.
Cable gland inlet.
6.
Enclosure.
7.
Sensor block.
8.
Nozzle.
9.
Ground connection.
10.
LEL sensor (high temperature).
050
Figure 1 : component parts of an OLCT 100 detector

1 - Presentation
9
Internal elements
The following elements are internally accessible to the user:
Id.
Description
1.
Terminal for the cable being connected to the controller (measurement unit,
automation).
2.
Sensor block connector.
3.
Calibration ribbon connector.
4.
4 mA adjustment.
5.
Push button access for 4 mA adjustment.
6.
Zeroing.
7.
Sensitivity adjustment.
OLC 100 detector
OLCT 100 explosimeter
OLCT 100 detector for toxic
gases
006
Figure 2 : internal view of the detectors

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OLC(T) 100
User manual
Identifiers
The enclosure has two identifier labels, as described below:
Company label
This in turn groups the detector features together:
Id.
Description
.
008
Figure 3 : Firmplate
1.
Manufacturer's name.
2.
Type of product
3.
ATEX- IECEx Marking
4.
CE symbol and the number of the
organisation that provided the OLDHAM
production quality certification (INERIS )
5.
Warning..
6.
Type of gas detected and range of
measurement.
7.
Maximum ATEX certification temperature
(excluding metrological performance)
8.
Symbol of Marine Certification and
number of the Approval Agency that
issued the certificate
9.
Recycling symbol.
Side label
This label shows the following :
Id.
Description
1.
Thread diameter and pitch for cable inlet
2.
Detector reference number, less sensor (P/N)
3.
Detector serial number (S/N)
The first two digits (in this case 09) correspond
to the year of manufacture (in this case 2009)
010
Figure 4 : side label
2
3
1
CH4
0-100% LIE
9

2 –Ranges
11
Chapter 2 | Ranges
OLC 100 and OLCT 100 ranges
The OLC 100 range is reserved for the detection of explosive vapor by using a
Wheatstone bridge sensor.
The OLCT 100 range of detectors is provided with an amplifier producing a 2 or 3
wire 4-20 mA analog output. These are transmitter detectors and, therefore, the
letter "T".
(1) Requires the use of a Zener barrier
(2) Sensor can be remote up to 5, 10, or 15 meters using a high temperature cable
(3) mV bridge output, 3 wires
EC : Electrochemical sensor
SC : Semi-conductor sensor.
LEL : Catalytic bead
AP : Poison resistant
Table 1 : comparison of OLC 100 and OLCT 100 series detectors
OLC 100
OLCT 100 XP
OLCT 100
XPIR
OLCT 100 IS
OLCT 100 HT
Features
Explosion
proof
Explosionproof
Explosionproof
Intrinsically
safe (1)
Explosionproof
(2)
Detection
of
explosive
gases
Catalytic
sensor (VQ1)
Catalytic
sensor (VQ1
or AP 4F) or
semi-
conductor
Infrared
sensor
Catalytic
sensor
high
temperature
Detection
of toxic
gases
EC
Or SC
EC
Detection
of oxygen
EC
EC
Detection
of CO2
Infrared
sensor
4-20 mA
output
(3)
2 wires for EC
3 wires for SC
3 wires for LEL
3 wires
2 wires
3 wires

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OLC(T) 100
User manual

3 - Installation
13
Chapter 3 | Installation
It is recommended that the guides relating to the installation, use, and
maintenance of flammable gas and oxygen detectors (standard EN/IEC 60079-
29-2) and toxic gas detectors (standard EN 45544-4) should be clearly
understood.
Installation shall be in accordance with the standards in force, classification of the
zone, and in conformity with standards EN/IEC 60079-14 and EN/IEC 61241-14,
the editions in force, or with other national and/or local standards.
Regulations and conditions of use
The installation should meet all the regulations currently in force for
installations in explosive atmospheres, in particular the standards IEC/EN
60079-14 and IEC/EN 60079-17 (whichever editions are in force) or in
accordance with other national standards.
Generally speaking, the ambient temperature, supply voltage, and power that
are mentioned in this document relate to explosion safety. This has nothing
to do with the operating temperatures of the detector.
The equipment is allowed in zones 0 (IS version only), 1, 2, 20 (IS version
only), 21 and 22 for ambient temperatures ranging from -50 ° C to + 70 °.
The detector sensor in the transmitter should always be in contact with the
ambient air. Therefore:
- Do not cover the detector.
- Do not paint the detector.
- Avoid dust.
Necessary equipment
Complete detector assembly
Requisite connector cable
Multimeter (intrinsically safe, if necessary)
Tools
Fixing hardware

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OLC(T) 100
User manual
Electrical power supply
Type of detector
Supply (V DC)
Maximum
current (mA)
Power consumed
(mW)
OLCT 100 XP HT
OLCT 100 XP LEL
15,5 to 32
15,5 to 32
110
100
1705
1550
OLCT 100 XP IR
15,5 to 32
80
930
OLCT 100 XP EC
10 to 32
23,5
235
OLCT 100 XP SC
15,5 to 32
100
1550
OLC 100
By Oldham
controller
340
(1)
(1) Depends on the central measurement unit.
Location of the detector
Depending on the density of the gas to be detected or the application, the detector
shall be positioned at the ground level, or on the ceiling at the same height as the
airflow, or near to the air extraction ducts. Heavy gases may be detected at the
ground level, while light gases will be found at ceiling height. Gas densities are
provided on page 28.
Detector positioning
The detector shall be installed with the detector sensor pointing downwards.
For explosive gas detectors only, any tilt of more than 45° from the vertical will
lead to an inaccurate measurement.
014
Figure 5 : sensor pointing downwards (left) and maximum tilt angle for an
explosimeter (right)

3 - Installation
15
Installation of the enclosure shall be secured with 4 x M6 screws and the
appropriate plugs for the supporting material
016
Figure 6 : fixing template for the enclosure
A special holder is available for mounting the detector on the ceiling (see section
on accessories.
In the OLCT 100 HT version, only the OLC20 HT removable detector head can be
used at temperatures from -20°C to + 200°C. The OLCT 100 HT enclosure can
only be used in ambient temperatures from -40°C to + 70°C. The high
temperature cable between the OLCT 100 HT enclosure and the OLC20 HT head
is integral with the instrument and is not user-replaceable.
The cable should be protected mechanically
Connector cable
The detector shall be connected to the controller (measurement and automation
unit) by a shielded instrumentation cable, armoured when necessary. The choice
of cable will be dictated by the particular requirements of the installation, distance,
and type of detector (see table below).
018
Figure 7: the cable connecting the detector to the controller should be chosen with
care
Central unit
Detector
Connector
cable

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OLC(T) 100
User manual
018
Type of detector
Type of sensor
Maximum length(km)for
cableofcross-section as
indicated
Maximum
load
resistancefor
4-20Ma
0,5mm²
0,9mm²
1,5mm²
Upstream linevoltage
(Vcc)
24
24
24
OLCT100XP
Catalytic or
semiconductor
0,8
1,4
2,4
250
OLCT100XP(1)
Electrochemical
<4
<4
<4
OLCT100XPIR
Infra-red
1,4
2,6
4,4
250
OLCT100 IS(2)
Electrochemical
1,8
3,3
<4
OLCT100HT
Catalytic, high
temperature
0,8
1,4
2,4
250
(1) for resistance calculations, the assumed load is 120  for 4-20 Ma.
(2) for resistance calculations, the assumed load is 120  for 4-20 Ma, and a 300  Zener
blocking diode.
Warning: all wiring should meet the installation standards and should be described in a system
document forSIinstallations
The cable must have a braided screen to reduce the influence of electrical and
radio-frequency interference. A cable such as AFNOR M 87-202 01-IT-09-EG-FA
(Nexans) may be used. It shall be selected according to the type of detector and
in accordance with the table shown hereinabove. Below are further examples of
suitable cables:
Non ATEX zone: CNOMO FRN05 VC4V5-F
ATEX zone: GEUELYON (U 1000RHC1)
ATEX zone: GVCSTV RH (U 1000)
ATEX zone: xx-xx-09/15- EG-SF or EG-FA or EG-PF (U 300 compatible with
M87202)
The maximum permissible length will depend on the cross-section of the cable
conductors (see table) and on the minimum supply voltage.
Cable connection
Switch off line power supply
On the controller:
1. Inhibit any installation alarms to avoid unexpected triggering during operation.
2. In accordance with the manufacturer’s instructions, switch off the power to the
module in order to be connected to the detector.

3 - Installation
17
Cable preparation
The cable shall be taken from the controller (measurement and automation) to the
point of measurement (see Figure 8). The passage, support, and protection of the
cable shall be according to best practice.
Cable entry
It is essential that the instructions provided by the manufacturer of the
compression gland are followed and the braided screen is correctly connected.
M20x1.5 flamme proof certified cable gland shall be used (see Chapter 11).
1 - Remove the joint and the two
metal washers found in the
sensor.
2 - Arrange the cable as shown in the
picture.
3 - Spread the braided shield as
shown in the picture.
Avoid creating "pigtails" with the
braided shield.

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OLC(T) 100
User manual
4 - Insert the part back into the
OLCT100.
Cable connection
The connection of the cable between the detector and controller should be made
with the power off. The site should be at equal potential
Connect the cable to the detector side before connecting the controller side.
After the wiring has been completed, connect the cable screen to the ground
terminal of the controller.
022
Figure 8: connections for a 2-wire 4-20 Ma detector

3 - Installation
19
024
Figure 9: connections for an intrinsically safe, 2-wire 4-20 Ma detector with a Zener
diode
023
Figure 10: connections for a 3-wire 4-20 Ma detector
026
Figure 11: connections for a 3-wire OLC 100 type detector

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OLC(T) 100
User manual
Connecting the enclosure to ground
Connect the enclosure ground terminal to earth according to the regulations. This
ground connection may, however, be taken from the terminal on the screw fixing
the PCB to the inside of the housing.
028
Figure 12 : Ground connection terminal
Closing the cover
Before connecting the cable to the terminal on the controller, it is essential that the
cover is completely closed.