Oldham OLCT 10N User Manual
OLCT 10N
User Manual
Part Number: NPO10NGB
Version: I.1
Digital Gas
Detector
The Fixed Gas Detection Experts
2
OLCT 10N
User Manual
Copyright 2019 by OLDHAM S.A.S
March 2019
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 information 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: +33 (0)3 21 60 80 80
Fax: +33 (0)3 21 60 80 00
3
Contents
Chapter 1 | Overview .............................................................. 7
Purpose ...................................................................................................... 7
Composition of the Detector Assembly ...................................................... 7
Type of detector available .......................................................................... 8
Chapter 2 | Installation ........................................................... 9
Regulations and conditions of use ............................................................. 9
Location of the detector.............................................................................. 9
Detector positioning ................................................................................... 9
Connection ............................................................................................... 10
Configuration of communication .............................................................. 12
Scope of use ............................................................................................ 14
Chapter 3 | Maintenance ...................................................... 15
Maintenance Frequency........................................................................... 15
Semi-automatic calibration ....................................................................... 16
Sensor replacement ................................................................................. 18
Manual calibration .................................................................................... 20
Chapter 5 | Spare Parts ........................................................ 25
Chapter 6 | UE Declaration ................................................... 27
Chapter 7 | Specifications .................................................... 29
Detector .................................................................................................... 29
Sensor specifications ............................................................................... 30
Line length (use with MX 32) ................................................................... 32
Line length (use with MX 43) ................................................................... 35
Chapter 8 | Specific instructions for use in explosive
atmospheres in accordance with European ATEX Directive
94/9/EC 39
General comments ................................................................................... 39
Marking for LEL versions ......................................................................... 39
Marking for toxic gas or oxygen detector versions (except CO2 versions)
40
4
OLCT 10N
User Manual
Thank you for choosing this OLDHAM instrument.
All 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.
5
Warnings
This is not a contractual document. OLDHAM reserves the right to alter the
technical features of its equipment at any time and for any reason without prior
notice.
READ THESE INSTRUCTIONS CAREFULLY BEFORE USING FOR THE
FIRST TIME: 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.
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.
Destruction of equipment
European Union only. This symbol indicates that, in conformity with
directive DEEE (2002/96/CE) and in accordance with local regulations,
this product must not be discarded with household waste.
It must be disposed of in a collection area that is designated for this purpose, for
example at a site that is officially designated for 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.
6
OLCT 10N
User Manual
1- Overview
7
Chapter 1 | Overview
Purpose
The OLCT 10N is a digital detector designed to detect a particular gas, depending
on the type of sensor used. This range of digital detectors is compatible only with
the Oldham MX 43 or MX32v2 controller.
Composition of the Detector Assembly
An OLCT 10N detector contains the following parts:
Rep.
Description
1.
Enclosure
2.
Cable gland
3.
PCB
4.
Sensor
5.
Terminal
6.
Gas input
7.
LED
8.
Cover
8
OLCT 10N
User Manual
Figure 1: Component parts of an OLCT 10N
Type of detector available
Gas
Range
Methane (CH4)
0-100% LEL (5% vol.)
0-100% LEL (4.4% vol.)
Hydrogen (H2)
0-100% LEL (4% vol.)
Butane (C4H10)
0-100% LEL (1,5% vol.)
Propane (C3H8)
0-100% LEL (2% vol.)
Oxygen (O2)
0-30% vol.
Carbone monoxide (CO)
0-300 ppm
0-1000 ppm
Carbon dioxide (CO2)
0-5000ppm
0-5%vol.
0-100% vol.
Hydrogen sulfide (H2S)
0-30 ppm
0-100 ppm
Nitrogen monoxide (NO)
0-100 ppm
0-300 ppm
Nitrogen dioxide (NO2)
0-10 ppm
0-30 ppm
Ammonia (NH3)
0-100 ppm
0-1000 ppm
2- Installation
9
Chapter 2 | Installation
Please read the guides on 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).
Regulations and conditions of use
Where applicable, the installation should meet all the regulations currently in
force for installations in explosive atmospheres, in particular standards IEC/EN
60079-14 and IEC/EN 60079-17 (current editions).
Generally speaking, the ambient temperatures, supply voltages and power
outputs that are mentioned in this document relate to explosion safety. They
do not relate to the detector’s operating temperatures.
The equipment is authorized for use in ATEX zones 2 and 22 at ambient
temperatures between -20°C and +55°C.
The sensor in the transmitter should always be in contact with ambient air.
Therefore:
- Do not cover the detector
- Do not paint the detector
- Avoid dust
The OLCT 10N may be used only with the OLDHAM MX 43 or MX 32v2
measurement and alarm controller.
CO2 versions are not certified to use in ATEX area
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.
Detector positioning
The detectors shall preferably be positioned in an accessible place to facilitate
inspection and maintenance as well as ensure the safety of the operators. The
detectors shall be protected against shock hazards and must not be obstructed by
10
OLCT 10N
User Manual
anything that will prevent them from measuring the ambient environment for which
they are intended.
The detector shall be installed with the cable gland pointing downwards. If
installed at an angle of more than 45° from the vertical or in a horizontal position
(ceiling-type installation), the detector will not measure correctly and will need to
be re-calibrated.
Figure 2: OLCT 10N dimensions (in millimeters)
Connection
As a reminder, the OLCT 10N can only be connected to the OLDHAM MX 43 or
MX 32v2 controller.
RS485 transmission
The OLCT 10N has 2 cable glands that are used for the input cable and the output
cable to the next module.
The detectors must be connected using MPI-22A cable type, minimum core size is
0.22 mm² (RS485 cable with 2 shielded twisted pairs, nominal impedance of
100 Ohm). This cable carries the RS485 signal on one pair and the power supply
for the modules on the other pair. The +24VDC, 0V, A and B terminals are
respectively connected to the +24VDC, 0V, A and B terminals of the other
2- Installation
11
modules in the line and then to the corresponding line connector of the MX 43 or
MX 32v2 controller.
The cable shielding must be connected to a ground terminal.
The 120 end-of-line resistor must be placed at the end of the line. This simply
involves switch #8 being moved to the ON position on the last module (cf. Fig. 5).
Before connecting the detector to the control unit, please disable any installation
alarms to avoid unexpected triggering during operation.
*
Connection is made according to the following schematic:
Figure 3: Schematic for connecting modules on a MX 43 or MX 32v2 line
No portion of the bare end of the terminal wires should be visible. For
protection against any electromagnetic disturbances, the data as well as screen
wires (or braids) must be cut as short as possible.
The connection of the cable between the detector and controller should be made
with the power off. The site should be at equal potential.
Controller line terminal
Ground
terminal
Detector terminal
12
OLCT 10N
User Manual
Configuration of communication
Module address
All the digital modules on a line must be
identified by a unique address.
Switches 1 to 5 of the configuration block of
each module make it possible to establish an
address number (1 to 32) in binary mode.
In the illustration to the right, the address 9
(10010) has been defined.
The Addressing Table below lists the possible
combinations.
Figure 4: Switches for
address configuration
Address
module
Switches
(ON = 1 ; OFF = 0)
Address
module
Switches
(ON = 1 ; OFF = 0)
1 2 3 4 5 1 2 3 4 5
1 1 0 0 0 0
17 1 0 0 0 1 2 0 1 0 0 0
18 0 1 0 0
1
3 1 1 0 0 0
19 1 1 0 0
1
4 0 0 1 0 0
20 0 0 1 0 1 5 1 0 1 0 0
21 1 0 1 0
1
6 0 1 1 0 0
22 0 1 1 0
1
7 1 1 1 0 0
23 1 1 1 0 1 8 0 0 0 1 0
24 0 0 0 1
1
9 1 0 0 1 0
25 1 0 0 1
1
10 0 1 0 1 0
26 0 1 0 1 1 11 1 1 0 1 0
27 1 1 0 1
1
12 0 0 1 1 0
28 0 0 1 1
1
13 1 0 1 1 0
29 1 0 1 1 1 14 0 1 1 1 0
30 0 1 1 1
1
15 1 1 1 1 0
31 1 1 1 1
1
16 0 0 0 0 1
32 0 0 0 0
0
Table 1: Addressing table (address depends on switch positions)
2- Installation
13
Remarks:
■ During module replacement, all the configuration switches of a new module
must be positioned in the same configuration as those of the previous
module.
■ Switch #6 (FRAME FILLING) must be set to OFF (unused option).
■ Switch #7 (DELAY) must be set to ON.
End of line resistance
For the last detector, set switch #8 (EOL
RESISTOR) to ON.
Figure 5: End of line resistor switch
in position “ON”
14
OLCT 10N
User Manual
Scope of use
The OLCT 10N may be used only with the OLDHAM MX 43 or MX 32v2
measurement and alarm controller.
The sensors have certain limitations; it is essential to fully recognize these
limitations.
Presence of specific components
Vapor from components containing silicone or sulfur can affect the
catalytic sensors and thereby distort measurements. If sensors have been
exposed to these types of compound, inspection or calibration will be
necessary.
High concentrations of organic solvents (e.g. alcohols, aromatic solvents,
etc.) or exposure to quantities of gas greater than the specified range of
measurement can damage the electrochemical sensors. Inspection or
calibration is then recommended.
In the presence of high concentrations of carbon dioxide (CO2 > 1% vol.),
the oxygen-measuring electrochemical sensors can slightly overestimate the
concentration of oxygen (0.1 to 0.5% vol. O2 overestimate).
Operation under low oxygen levels
If an electrochemical sensor is used in an atmosphere containing less
than 1% vol. oxygen for over one hour, the measurement may be an
underestimate.
If a catalytic sensor is used in an atmosphere containing less than 10%
vol. oxygen, the measurement may be an underestimate.
Loading...