Oldham OLCT10N User manual

x
P/N : NPO10NGB
Rev A
Digital
Transmitter
OLCT10N

2OLCT10N
Manual
Copyright 2010 by Industrial Scientific – Oldham S.A.S
First edition, English version
All rights reserved. No reproduction of all or part of this document, in any
form, is permitted without the written consent of Industrial Scientific –
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.
Industrial Scientific Oldham S.A.S
Rue Orfila
Z.I. Est – BP 20417
F–62027 ARRAS Cedex
Tel.: [phone]
Fax: [phone]

3
Contents
Chapter 1 | Presentation.........................................................6
Composition of the detector .......................................................................6
Type of detector available..........................................................................7
Chapter 2 | Installation............................................................8
Regulations and conditions of use .............................................................8
Location of the detector..............................................................................8
Detector positioning ...................................................................................8
Connection .................................................................................................9
Configuration of communication ..............................................................10
Scope of use ............................................................................................12
Chapter 3 | Maintenance.......................................................13
Frequency of maintenance ......................................................................13
Automatic calibration................................................................................14
Sensor replacement .................................................................................17
Manual calibration ....................................................................................18
Chapter 4 | Part numbers and accessories......................... 20
Chapter 5 | Spare Parts.........................................................22
Chapter 6 | Declaration of EC conformity ...........................23
Chapter 7 | Specifications .................................................... 25
Detector....................................................................................................25
Sensor specifications ...............................................................................26
Line length (use with MX43) ....................................................................26

4OLCT10N
Manual
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
INDUSTRIAL SCIENTIFIC 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.
INDUSTRIAL SCIENTIFIC OLDHAM does not support or authorize any
business, person, or legal entity in assuming responsibility on behalf of
INDUSTRIAL SCIENTIFIC OLDHAM, even though they may be involved in the
sale of INDUSTRIAL SCIENTIFIC OLDHAM products.
INDUSTRIAL SCIENTIFIC 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 INDUSTRIAL SCIENTIFIC OLDHAM
FOR THE USE THAT THEY ARE INTENDED.
Ownership clauses
The drawings, specifications, and information herein contain confidential
information that is the property of INDUSTRIAL SCIENTIFIC 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 INDUSTRIAL SCIENTIFIC
OLDHAM equipment, or for any other reason without the prior consent of
INDUSTRIAL SCIENTIFIC OLDHAM.

5
Warning
This is not a contractual document. In the best interest of its customers and
with the aim of improving performance, INDUSTRIAL SCIENTIFIC 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 INDUSTRIAL SCIENTIFIC OLDHAM by INDUSTRIAL
SCIENTIFIC OLDHAM personnel or by personnel authorized by INDUSTRIAL
SCIENTIFIC 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.

6OLCT10N
Manual
Chapter 1 | Presentation
Purpose
The OLCT10N is a digital detector designed to detect a particular gas depending
on the type of sensor used.
Composition of the detector
An OLCT10N detector comprises the following elements:
Rep. Description
1. Enclosure
2. Cable gland
3. PCB
4. Sensor
5. Terminal
6. Gas input
7. Led
8. Cover

7
050
Figure 1 : component parts of an OLCT10N.
Type of detector available
Gas Range
Oxygen (O2) 0-30% vol
Carbone monoxide (CO) 0-300 ppm
0-1000 ppm
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

8OLCT10N
Manual
Chapter 2 | Installation
Regulations and conditions of use
The 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.
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.
Detector positioning
The detectors shall preferably be positioned in an accessible place to facilitate the
operations of inspection and maintenance as well as the absolute safety of the
operators. The detectors must not be obstructed by anything that will prevent
them from measuring the ambient environment to be checked.
The detector shall be installed with the cable gland pointing downwards.
For explosive gas detectors only, any tilt of more than 45° from the vertical will
lead to an inaccurate measurement.

9
Figure 2 : OLCT10N dimensions
Connection
RS485 transmission
There are two cable entries on the OLCT10N, one entry is for the input signal and
one is for the output signal – this is used for digitally connecting multiple
transmitters on a single line to the MX43 Controller.
The digital modules are linked by 2 twisted cable pairs of 4 x 0.22 m² minimum,
type MPI-22A, nominal resistance of 120 Ohms. This cable carries the RS485 (A
and B) signal on one pair and the power supply of the modules (0–24 VDC)
connected to the line on the other pair. The + 24 VDC, 0V, A, B terminals are
respectively connected to +24VDC, 0V, A, B terminals of the other modules on the
line and then to the connector of the corresponding line on the central unit. The
cable shielding must be connected to the grounding rod of the MX43.
At the end of the busbar, the 120-Ohm end of line resistor (EOL
RESISTOR/RESISTANCE F.D.L) must be activated (switch n°8 must be set to ON, 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.

10 OLCT10N
Manual
Before connecting the detector to the control unit, please inhibit any installation
alarms to avoid unexpected triggering during operation.
*
Connecting is made according to the following schematic:
Figure 3 : principle of connecting modules on a MX43 line.
Configuration of communication
Detector 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.
004
Figure 4 : Switches of
address configuration.
The connection of the cable between the detector and central unit should be
made with the power off. The site should be at equal potential
MX43 line terminal
Ground
Terminal
Detector terminal

11
Switches
(ON = 1 ; OFF = 0)
Switches
(ON = 1 ; OFF = 0)
Addre ss
1 2 3 4 5
Addre ss
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
the previous module.
■The switch 6 (FRAME FILLING) must be set to OFF (unused option).
■The switch 7 (DELAY) must be set to ON.

12 OLCT10N
Manual
End of line resistance
For the last detector of each, set switch
n° 8 (EOL RESISTOR/RESISTANCE
F.D.L) to ON.
006
Figure 5:End of line resistor switch
in position “ON”.
Scope of use
The sensors have certain limitations; it is essential to fully recognize these
limitations
Presence of specific components
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.
Operation under low oxygen levels
If an electrochemical detector sensor is used in an atmosphere comprising less
than 1% oxygen for over one hour, the measurement may be an
underestimate.
Fig. 10 : IN
T
C
O
SLAVE N
U
NUMERO ESC
L
E.O.L. RESIST
RESISTANCE
FRAME FILLIN
G
REMPLISS TRA
DELAY
TEMPORISATIO
F
S
L
N
U
E.
O
RE
F
R
RE
D
E
TE

13
Chapter 3 | Maintenance
Maintenance primarily comprises sensor calibration and changing any sensors
that no longer meet their initial metrological characteristics.
Since they are liable to affect detection reliability, the tasks
described in this chapter are reserved for authorized trained
personnel only.
Frequency of maintenance
Gas detectors are safety devices. OLDHAM recommends the regular testing of
fixed gas detection installations. This type of test consists of injecting the standard
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. The interval between
tests should not exceed 3 months. If a detector should fail to react when 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 site manager should put safety procedures in place on-site. INDUSTRIAL
SCIENTIFIC cannot be held responsible for their enforcement.

14 OLCT10N
Manual
The OLCT10N can be calibrated either :
- Manually
- Or automatically
The manual calibration have to be made only after each sensor or
detector replacement. A manual calibration has to be followed by
an automatic calibration.
Please find below the different calibration gas concentrations.
Gas Range Calibration gas
cocnentration
Oxygen (O2) 0-30% vol 20.9 %
Carbone monoxide (CO) 0-300 ppm
0-1000 ppm
100 ppm
300 ppm
Hydrogen sulfide (H2S) 0-30 ppm
0-100 ppm
25 ppm
25 ppm
Nitrogen monoxide 0-100 ppm
0-300 ppm
50 ppm
50 ppm
Nitrogen dioxide 0-10 ppm
0-30 ppm
10 ppm
10 ppm
Ammonia 0-100 ppm
0-1000 ppm
100 ppm
1000 ppm
Automatic calibration

15
Cal ON Magnetic calibration cap ON
Cal OFF Magnetic calibration OFF
Cal OFF
Cal OFF
Cal OFF
Cal OFF
Cal ON
Delay TCALS
30 sec
Réel
Power down if OK
Blinking if fault
Power down if OK
Blinkin
g
if f
au
l
t
GREEN
Blinkin
g
GREEN
Fixed
Power down if OK
Blinking if fault
Power down if OK
Blinking R if fault
RED
Blinking
RE
Blinking
Power down if OK
Blinking R if fault
LED detector status
Calibration beginning
Calibration end
Sensitivity validation
Wait Cal OFF
Cal OFF
Zero stabilization
Zero setting
[ 1 mn ]
Zero validation
Wait Cal OFF
Cal OFF
Sensitivity stabilization
[ 1 mn ]
Stable sensitivity
[20 to 60 s]
Start sensor stabilization
[
1 mn
]
Normal
Stable zero
[20 to 60 s]
Wait Cal ON
Cal ON

16 OLCT10N
Manual
Calibration LED
3
1
2
6 54
Automatic calibration
Slug the gas
With a 1 L/M
discharge
Place the
magnet
horizontally
The magnetic calibration allows for one-man
and non-intrusive calibration.
Manual calibration with zero and span potentiometers
is possible by opening the OLCT10N
Re
f
P/N QTY Description
1 6128 972 1 Support
2 6155771 1 Magnet
3 6325161 1 Handle
4 6331141 1 Calibration cap
5 6902406 3 Screw PCL TZ
M3*10
6 6903305 1 Swivel H M3

17
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
have 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
LED (2) is on.
3. Release the button.
4. Replace the sensor and
conduct both manual and
automatic
calibrations (This is a
mandatory step).
Figure 6: Sensor
replacement

18 OLCT10N
Manual
Manual calibration
The calibration kit provided by ISC must be used (Ref. 6116291 female connector
/ wires / voltmeter connection files).
1. Remove the detector cover
2. Connect the cable (strand) to the circuit’s male connector
Zero the sensor
1. Ensure that the sensor is in clean air. If not, inject air into the sensor at a
flow rate of 1 L/M, then wait for voltmeter levels to stabilize (use the gas
injection device: bottle of synthetic air, calibration pipe, tube).
2. Adjust the zero with the potentiometer’s ZERO until the voltmeter reads 0
mV.
Sensitivity
1. Now inject the known gas (1 L/M) into the sensor. Wait for the voltmeter
signal to stabilize.
2. Adjust the sensitivity if necessary with the potentiometer “SENS” until the
signal value (in mV) corresponds to the amount of 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.”
Measuring scale
1600 Reference gas value
U
(mV)
x
=

19
MAINTENANCE WIRES:
+VCC (red) = + power supply
Signal S (yellow) = signal from 0 mV to 1600 mV for zero and sensitivity settings
Ref 2,5V (brown) = zero reference for signal reading from 0 mV to 1600 mV
GND (black) = electronic circuit ground
Note: Blue and green wires will not be used.

20 OLCT10N
Manual
Chapter 4 | Part numbers and
accessories
Part Number Description
OLCT10N-200 OLCT10N Digital detector, range 0-30% vol O2
OLCT10N-204 OLCT10N Digital detector, range 0-300 ppm CO
OLCT10N-205 OLCT10N Digital detector, range 0-1000 ppm CO
OLCT10N-213 OLCT10N Digital detector, range 0-30 ppm H2S
OLCT10N-214 OLCT10N Digital detector, range 0-100 ppm H2S
OLCT10N-216 OLCT10N Digital detector, range 0-100 ppm NO
OLCT10N-217 OLCT10N Digital detector, range 0-300 ppm NO
OLCT10N-219 OLCT10N Digital detector, range 0-10 ppm NO2
OLCT10N-220 OLCT10N Digital detector, range 0-30 ppm NO2
OLCT10N-231 OLCT10N Digital detector, range 0-100 ppm NH3
OLCT10N-232 OLCT10N Digital detector, range 0-1000 ppm NH3