Teledyne OLCT 10 N User manual

NPO10NGB-Revision J.1
OLCT 10 N
DIGITAL GAS DETECTOR
USER
MANUAL

OLCT 10 N
DIGITAL GAS DETECTOR
USER MANUAL
II
NPO10NGB
Revision J.1
User Manuals in other languages are available on
Website https://teledynegasandflamedetection.com
Copyright August 2022 by TELEDYNE OLDHAM SIMTRONICS 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 TELEDYNE OLDHAM SIMTRONICS 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.
TELEDYNE OLDHAM SIMTRONICS S.A.S.
Rue Orfila
Z.I. Est – CS 20417
62027 ARRAS Cedex

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Thank you for choosing this TELEDYNE OLDHAM SIMTRONICS 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
TELEDYNE OLDHAM SIMTRONICS 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 TELEDYNE OLDHAM
SIMTRONICS, even though they may be involved in the sale of TELEDYNE OLDHAM
SIMTRONICS products.
TELEDYNE OLDHAM SIMTRONICS 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 TELEDYNE OLDHAM SIMTRONICS
ACCORDING TO THE APPLICATION.
Ownership clauses
The drawings, specifications, and information herein contain confidential information that is the
property of TELEDYNE OLDHAM SIMTRONICS.
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 TELEDYNE OLDHAM SIMTRONICS equipment, or for any other reason
without the prior written consent of TELEDYNE OLDHAM SIMTRONICS.
Warnings
This is not a contractual document. TELEDYNE OLDHAM SIMTRONICS 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 TELEDYNE OLDHAM
SIMTRONICS, by TELEDYNE OLDHAM SIMTRONICS personnel, or by personnel authorized
by TELEDYNE OLDHAM SIMTRONICS.

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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.

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Table of Contents
1Overview........................................................................................... 1
1.1 Purpose..................................................................................................................1
1.2 Composition of the Detector Assembly ...................................................1
1.3 Type of detector available............................................................................2
2Installation ........................................................................................ 3
2.1 Regulations and conditions of use .............................................................3
2.2 Location of the detector................................................................................3
2.3 Detector positioning.........................................................................................4
2.4 Connection..........................................................................................................4
2.5 Configuration of communication...............................................................5
2.6 Scope of use........................................................................................................7
3Maintenance ................................................................................... 9
3.1 Maintenance Frequency ...............................................................................9
3.2 Semi-automatic calibration ..........................................................................11
3.3 Sensor replacement .........................................................................................13
3.4 Manual calibration ...........................................................................................14
4Part Numbers and Accessories................................................... 17
5Spare Parts........................................................................................ 19
6UE Declaration ................................................................................. 21
7Specifications .................................................................................. 23
7.1 Detector................................................................................................................23
7.2 Sensor specifications........................................................................................24
7.3 Line length (use with MX 16) .........................................................................25
7.4 Line length (use with MX 32v2).....................................................................26
7.5 Line length (use with MX 43) .........................................................................28

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7.6 Line length (use with MX 256) .......................................................................30
8Specific instructions for use in explosive atmospheres in
accordance with European ATEX Directive 94/9/EC............ 31
8.1 General comments ..........................................................................................31

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1Overview
1.1 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 TELEDYNE OLDHAM
SIMTRONICS MX 43 or MX32v2 or MX16 or MX256controller.
1.2 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
Figure 1: Component parts of an OLCT 10N

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1.3 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

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2Installation
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).
2.1 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 TELEDYNE OLDHAM SIMTRONICS MX 16
or MX32v2 or MX 43 or MX 256 measurement and alarm controller.
Only catalytic versions are certified to use in ATEX II 3GD zone
O2, Toxics and CO2versions are not certified to use in ATEX area
2.2 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.

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2.3 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 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)
2.4 Connection
As a reminder, the OLCT 10N can only be connected to the TELEDYNE OLDHAM
SIMTRONICS MX 16 or MX32v2 or MX 43 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 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.

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The 120 Ωend-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).
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.
Before connecting the detector to the control unit, please disable any installation alarms to avoid
unexpected triggering during operation.
The connection of the cable between the detector and controller should be made
with the power off. The site should be at equal potential.
Connection is made according to the following schematic:
Figure 3: Schematic for connecting modules on a MX 43 or MX 32v2 line
2.5 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)
Controller line terminal
Ground
terminal
Detector terminal

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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)
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.

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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”
2.6 Scope of use
The OLCT 10N may be used only with the TELEDYNE OLDHAM SIMTRONICS 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.

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3Maintenance
Maintenance primarily involves sensor calibration and changing any sensors that no longer meet
their initial performance characteristics.
Since they are liable to affect detection reliability, the tasks described in this
chapter are reserved for authorized trained personnel only.
Inspection and maintenance shall be carried out in accordance with standard
EN/IEC 60079-17. The instructions contained in the ATEX marking shall be
observed (see Chapter 8).
When first powered up or after a sensor replacement, wait for 1 hour before
performing a calibration.
It is impossible to calibrate an OLCT 10N within 10 minutes after a power cycle.
3.1 Maintenance Frequency
Gas detectors are safety devices. TELEDYNE OLDHAM SIMTRONICS recommends the regular
testing of fixed gas detection installations. This type of test consists of injecting the calibration gas
into the detector at a sufficient concentration to activate the pre-set alarms. It is to be understood
that this test is in no way a replacement for a detector calibration.
The frequency of gas tests depends on the industrial application where the detector is in use.
Frequent inspections should be made in the months following the commissioning of the installation,
and should then become more widely spaced provided that no significant deviation is observed.
If a detector should fail to react in contact with the gas, calibration is essential. The frequency of
calibrations shall be appropriate according to the results of the tests (humidity, temperature, dust,
etc.); however, it must not exceed one year.
The general manager should put safety procedures in place on-site. TELEDYNE OLDHAM
SIMTRONICS cannot be held responsible for their enforcement.
The OLCT 10N can be calibrated either:
•Manually
•Automatically
The manual calibration must be done only after each sensor or detector
replacement.
A manual calibration must be followed by an automatic calibration.
Please find below the different calibration gas concentrations.

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Gas
Range
Calibration gas concentration
Methane (CH4) 0-100% LEL (5% vol.)
0-100% LEL (4.4% vol.)
2.5% CH4/Air (50% LEL)
2.2% CH4/Air (50% LEL)
Hydrogen (H2) 0-100% LEL 2.0% H2/Air (50% LEL)
Butane (C4H10) 0-100% LEL 0.9% C4H10/Air (60% LEL)
Propane (C3H8) 0-100% LEL 1.1% C3H8/Air (55% LEL)
Oxygen (O2) 0-30% vol. 20.9% O2
Carbone monoxide (CO) 0-300 ppm
0-1000 ppm
100 ppm CO
300 ppm CO
Carbone dioxide (CO2) 0-5000 ppm
0-5% vol.
0-100% vol.
3000 ppm CO2
2.5% CO2
50% CO2
Hydrogen sulfide (H2S) 0-30 ppm
0-100 ppm
25 ppm H2S
25 ppm H2S
Nitrogen monoxide (NO) 0-100 ppm
0-300 ppm
50 ppm NO
50 ppm NO
Nitrogen dioxide (NO2) 0-10 ppm
0-30 ppm
10 ppm NO2
10 ppm NO2
Ammonia (NH3) 0-100 ppm
0-1000 ppm
100 ppm NH3
1000 ppm NH3

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3.2 Semi-automatic calibration
While the OLCT 10N is calibrating, the MX 43 or the MX 32v2 inhibits alarms triggered by the
detector and displays a maintenance code. Up to 32 sensors can be calibrated at the same time.
Cal ON
Attachment of gas injection device
Cal OFF
Removal of gas injection device
Cal
OFF
LED is OFF
GREEN blinking
GREEN steady
RED blinking
RED steady
LED sensor status
START
END
Normal
Inject zero air
(Nitrogen in the case of an
OLCT 10N O2)
Zero is stable
Internal
LED turns off as it
passes or blinks as
it fails
Cal ON
Calibration is
complete and
LED turns off as it
passes or blinks
as it fails
Zeroing is
l d
Remove the cap
and apply it
Inject span gas
and wait for
Signal is stable
Internal
Cal
OFF
Cal OFF
Cal ON

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Semi-automatic calibration device (P/N 6331163)

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3.3 Sensor replacement
Sensors should be replaced as a part of regular preventative maintenance or following a failed
calibration test.
After a sensor replacement, both manual and automatic calibrations must to be
conducted.
To change the sensor:
1. Remove the detector cover
2. Push and hold down the sensor replacement button (1) for 5 seconds until the solid green
3. LED (2) is on.
4. Release the button
5. Replace the sensor and conduct both manual and automatic calibrations (This is a mandatory
step)
Figure 6: Sensor replacement
In order to comply with the ATEX rules, the sensor of LEL detectors is soldered to
the card and cannot be changed separately. The entire OLCT 10N detector will
need to be replaced. As the detector is factory calibrated, there is no point
attempting manual calibration. However, a sensor change must be declared using
the maintenance menu of the MX 16 or MX 32v2 or MX 43 or MX 256 controller
(see MX 16 or MX 32v2 or MX 43 or MX 256 manual).

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3.4 Manual calibration
A voltmeter and the female connector provided by TELEDYNE OLDHAM SIMTRONICS (P/N
6116291) are required.
1. Remove the detector cover.
2. Connect the connector to the circuit’s male connector
3. Connect the voltmeter between S+ and S- (value in mV)
Zero the sensor
1. Ensure that the sensor is in clean air (in absence of O2 in the case of OLCT 10N O2). If not,
inject zero air (Nitrogen in the case of an OLCT 10N O2) into the sensor at a flow rate of 1
l/min, then wait for voltmeter signal to stabilize (use the calibration gas kit: zero air cylinder,
calibration cap, tube).
2. Adjust the zero with the potentiometer’s ZERO until the voltmeter reads 0 mV.
Sensitivity
1. Now inject the calibration gas (1 l/min) into the sensor. Wait for the voltmeter signal to
stabilize (use the calibration gas kit: calibration gas cylinder, calibration cap, tube).
2. Adjust the sensitivity if necessary with the potentiometer “SENS” until the signal value (in mV)
corresponds to the concentration in the reference gas used. Use the following formula to
calculate the correct value for the signal.
3. Stop injecting gas (remove the calibration pipe from the sensor).
4. Wait for the voltmeter to “return to zero”.
U
(mV)
=
1600
x
reference gas concentration
measurement scale
OLCT 10N
OLCT 10N connector - P/N 6116291
GND
S+
VCC
V
SENS
ZERO
S-