TELEDYNE OLDHAM SIMTRONICS CTX 300 User manual

NP300GB-Rev.O.0
CTX 300
ANALOGIC GAS DETECTOR
USER
MANUAL

CTX 300
ANALOGIC GAS DETECTOR
USER MANUAL
II
NP300GB
Rev.O.0
User Manuals in other languages are available on
Website https://teledynegasandflamedetection.com
Copyright January 2021 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 January be
changed without prior notice.
TELEDYNE OLDHAM SIMTRONICS S.A.S.
Rue Orfila
Z.I. Est – CS 20417
62027 ARRAS Cedex

CTX 300
ANALOGIC GAS DETECTOR
USER MANUAL
NP300GB
Revision O.0
III
Table of Contents
1General Information....................................................................... 1
1.1 User Manual.........................................................................................................1
1.2 Symbols used.......................................................................................................1
1.3 Safety instructions..............................................................................................2
1.4 Important information......................................................................................2
1.5 Liability limits........................................................................................................2
2Introduction...................................................................................... 3
2.1 General Information.........................................................................................3
2.2 Composition ........................................................................................................3
3Installation and connection......................................................... 5
3.1 Installing the detectors....................................................................................5
3.2 Electrical connections.....................................................................................7
4Powering up and use..................................................................... 11
4.1 Powering up.........................................................................................................11
4.2 4-20 mA analog output...................................................................................11
5Maintenance ................................................................................... 13
5.1 Calibration ...........................................................................................................13
5.2 Replacing a sensor ...........................................................................................18
5.3 Disposal..................................................................................................................18
6Spare parts ....................................................................................... 19
6.1 CTX/COX 300 toxic or oxygen sensors.......................................................19
6.2 CSC 300 semiconductor sensors .................................................................22
7UE declaration of conformity....................................................... 23
8Technical specifications ............................................................... 25
9Annex................................................................................................. 29
9.1 Indications for calibrating the CTX 300 SC ..............................................29
9.2 CTX 300 overview ..............................................................................................30

CTX 300
ANALOGIC GAS DETECTOR
USER MANUAL
IV
NP300GB
Revision O.0

CTX 300
ANALOGIC GAS DETECTOR
USER MANUAL
NP300GB
Rev.O.0
1
|
1General Information
1.1 User Manual
The instructions given in this manual must be read thoroughly before installation and start-up,
particularly those concerning the points related to the safety of the end-user. This user manual
must be made available to every person involved in the activation, use, maintenance, and repair
of the unit. The information, technical data, and diagrams contained in this manual are based on
the information that is available at a given time. In case of doubt, contact TELEDYNE OLDHAM
SIMTRONICS for additional information.
The aim of this manual is to supply simple and accurate information to the user . TELEDYNE
OLDHAM SIMTRONICS cannot be held liable for any misinterpretations in the reading of this
manual. In spite of our efforts to produce an error-free manual, it may nonetheless contain some
unintentional technical inaccuracies.
In the client’s interest, TELEDYNE OLDHAM SIMTRONICS reserves the right to modify the
technical characteristics of its equipment to increase their performance without prior notice. The
present instructions and their content are the inalienable property of TELEDYNE OLDHAM
SIMTRONICS .
1.2 Symbols used
Icon
Significance
This symbol indicates useful additional information.
This symbol indicates:
This equipment must be connected to ground.
This symbol indicates:
Protective earth terminal. A cable of the adequate diameter must be connected to
ground and to the terminal having this symbol.
This symbol indicates:
You must refer to the instructions.
This symbol indicates:
Warning! In the present mode of use, failure to adhere to the instructions
preceded by this symbol can result in a risk of electric shock and/or death.

CTX 300
ANALOGIC GAS DETECTOR
USER MANUAL
2
NP300GB
Revision O.0
European Union (and EEA) only. This symbol indicates that this product must not be
discarded with household waste, as per the EEA directive (2002/96/EC) and your
own national regulations.
This product must be disposed of at a collection point that is reserved for this purpose,
for example, an official site for the collection of electrical and electronic equipment
(EEE) in view of their recycling, or a point of exchange for authorized products that
is accessible when you acquire a new product of the same type.
Any deviation as regards these recommendations for the disposal of this type of
waste can have negative effects on the environment and public health, as these
electric and electronic products generally contain substances that can be dangerous.
Your full cooperation in the proper disposal of this product promotes a better use of
natural resources.
1.3 Safety instructions
Labels intended to remind you of the principal precautions of use have been placed on the unit in
the form of pictograms. These labels are considered an integral part of the unit. If a label falls off
or becomes illegible, please ensure it is replaced. The significance of the labels is detailed below.
The installation and electrical connections must be carried out by qualified personnel
according to the instructions of the manufacturer and the standards of the competent
authorities.
Failure to adhere to the instructions can have serious consequences on the safety of
persons. Please be extremely rigorous as regards electricity and assembly (coupling,
network connections).
1.4 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.
1.5 Liability limits
Neither TELEDYNE OLDHAM SIMTRONICS nor any other associated company under any
circumstances can be held liable for any damage, including, without limitations, damages for loss
or interruption of manufacture, loss of information, defect of the MX 43 control unit, injuries, loss
of time, financial or material loss, or any direct or indirect consequence of loss occurring in the
context of the use or impossibility of use of the product, even in the event that TELEDYNE
OLDHAM SIMTRONICS has been informed of such damage.

CTX 300
ANALOGIC GAS DETECTOR
USER MANUAL
NP300GB
Rev.O.0
3
2Introduction
2.1 General Information
CTX300 gas detectors are designed to measure toxic gases, CO2or vapors and oxygen. With
robust materials, a specifically-adapted design, appropriate accessories, stainless bolts and a
polyamide case (IP54), CTX 300 detectors are designed to withstand the roughest conditions.
Figure 1: overview of a CTX 300 with display (left) and without display (right).
2.2 Composition
Sensor type
CTX 300
Toxic
Oxygen
CO2
Semi-conductor
Gases
detected
Common toxic
gases detected.
Oxygen. CO2
•
Combustible
gas.
•Solvents.
•Some Freons.
Detection
method
Electrochemical
sensors (1).
Electrochemical
sensor.
Infrared
absorption.
Semiconductor sensor.
Type of
sensor pack
Pre-calibrated
removable
sensor pack (2).
Pre-calibrated
removable sensor
pack:
0-30% scale or
0-100% volume.
Pre-calibrated
removable
sensor pack
(2).
Removable sensor
pack, not pre-
calibrated.
Options
With display.
With display. With display.
Certification None. None None None
(1) Specific to each gas.
(2)Choice between several scales.

CTX 300
ANALOGIC GAS DETECTOR
USER MANUAL
4
NP300GB
Revision O.0

CTX 300
ANALOGIC GAS DETECTOR
USER MANUAL
NP300GB
Rev.O.0
5
3Installation and connection
3.1 Installing the detectors
3.1.1 Layout
While the measuring sensor is always located on the underside of the detector, several factors
determine where the detector should be located:
•If the gas being measured is lighter than the air, place the detector near the ceiling.
•If the gas is heavier than the air (CO2and Freons, for example) place the detector close
to the floor.
•Near offtake points.
•Generally, in locations where gas may accumulate, taking into consideration both:
- The effects of temperature;
- The outside winds direction.
3.1.2 Determining the best sensor location
Factors to consider when determining the best placement for the detector are:
•Potential sources for vapor and gas emissions.
•Characteristics of gases and vapors (density).
•Air circulation:
- Inside: mechanical or natural ventilation.
- Outside: wind direction and velocity.
•Effects of temperature.
•Local constraints (air flow, water splash, etc.).
Detectors should always be located in an easily accessible location for maintenance purposes.
Special accessories may be necessary to protect the equipment against any liquid projectiles,
dust, direct sunlight or low temperatures in the area.

CTX 300
ANALOGIC GAS DETECTOR
USER MANUAL
6
NP300GB
Revision O.0
3.1.3 Mechanical installation
Figure 2: overall dimensions of the CTX 300.
Figure 3: drilling diagram for wall mounting (view of the side flatten onto the ceiling).
Figure 4: ceiling mounting with a brace. The fixing drawing is identical to this of the wall mount.

CTX 300
ANALOGIC GAS DETECTOR
USER MANUAL
NP300GB
Rev.O.0
7
Ref.
Qty
Description
Code
Material
1 1 Brace 6132380 Stainless
2 4 Washer A25 ACCD 6905518 Stainless
3 4 Screw CHC LI2 6902218 Stainless
3.2 Electrical connections
3.2.1 Wiring specifications
If needed, consult the grounding instructions for TELEDYNE OLDHAM SIMTRONICS instruments
and related connection materials in Annex 1.
3.2.2 Connections for the various types of sensors
Wire
CTX 300 (TOX/OX)
with display
CTX 300 (TOX/OX)
without display
CTX 300 SC
without display
Output signal 4-20 mA 4-20 mA 4-20 mA
Active wires 3 2 3
Cable entry 1 x 6-11 mm 1 x 6-11 mm 1 x 6-11 mm
Wire
CTX 300 CO2
with display
CTX 300 CO2
without display
Output signal 4-20 mA 4-20 mA
Active wires 3 3
Cable entry 1 x 6-11 mm 1 x 6-11 mm
3.2.2.1 Connection of a 3-wire sensor to an TELEDYNE OLDHAM SIMTRONICS control
unit
Wire
Terminal number
(+) V DC power supply: 3
(-) V DC power supply (masse 0 V): 2
Output signal: 1

CTX 300
ANALOGIC GAS DETECTOR
USER MANUAL
8
NP300GB
Revision O.0
Figure 5: connection of a 3-wire sensor to an Oldham control unit.
3.2.2.2 Connection of a 2-wire sensor to an TELEDYNE OLDHAM SIMTRONICS control
unit
Wire
Terminal number
(+) V DC power supply: 3
Output signal: 1
Both wires are the 4-20 mA 2-wire loop.
Figure 6: connection of a 2-wire sensor to an TELEDYNE OLDHAM SIMTRONICS control unit.
3.2.2.3 Connection of a 3-wire CTX300 sensor to a non-TELEDYNE OLDHAM
SIMTRONICS control unit with an internal power supply
Figure 7: Connection of a 3-wire CTX300 sensor to a non-TELEDYNE OLDHAM SIMTRONICS control unit.
(R) Maximal load = 200 Ω.
(A) Power supply 15 ≤ Vcc ≤ 32.
18 ≤ Vcc ≤ 30 for CO2 sensor.
I max = 130 mA.
Control unit Detector
Control unit
Detector
+24 VDC
Signal
Other control
unit
Detector
+24 VDC
0V
Signal
+24 VDC
0V
Signal

CTX 300
ANALOGIC GAS DETECTOR
USER MANUAL
NP300GB
Rev.O.0
9
3.2.2.4 Connection of a 2-wire 4-20mA sensor to a non-TELEDYNE OLDHAM
SIMTRONICS control unit and to an internal power supply
Figure 8: Connection of a 2-wire 4-20mA sensor to a non-TELEDYNE OLDHAM SIMTRONICS control unit.
(A) Power supply 15< VCC<32V. I max = 30 mA.
3.2.3 Operating mode
3.2.3.1 CTX300 with display
•Remove the 4 screws (ref. 1).
•Remove the cover (ref. 2).
Figure 9
•
Completely remove the screw (ref. 4).
•Unscrew the screw a few turns (ref. 3).
Figure 10
•
Turn the display circuit as shown (ref. 5).
•Connect the cable (ref. 6) to the connector. Refer to
paragraph Connections for the vari
ous types of
sensors on page 7.
•Return the display circuit to its original position and
replace the cover.
Figure 11
Other control
unit
Detector
+24 VDC
Signal

CTX 300
ANALOGIC GAS DETECTOR
USER MANUAL
10
NP300GB
Revision O.0
3.2.3.2 CTX 300 without display
•Unscrew the 4 screws (ref. 1).
•Remove the cover (rep. 2).
•Proceed to wire the sensor according to the terminal
location.
Figure 12

CTX 300
ANALOGIC GAS DETECTOR
USER MANUAL
NP300GB
Rev.O.0
11
4Powering up and use
4.1 Powering up
•The sensor turns on when connected to a power
supply.
•If the sensor has a display, the green LED will be lit
(ref. 2) and a value will appear on the display screen
(ref. 1).
Figure 13
Figure 14: CTX 300 SC main circuit board.
In case of a problem with CTX 300 SC, verify that the maintenance switch (ref. 1), located on the
main circuit, is in the MES (measure) position.
4.2 4-20 mA analog output
For CTX 300 sensors, the 4-20 mA output current is proportional to the gas level.
The various states of the 4-20 mA output are:
•≤1 mA to indicate a fault.
•Between 4 and 20 mA for measurement values.
•≥ 20 mA if levels exceed measurement range.

CTX 300
ANALOGIC GAS DETECTOR
USER MANUAL
12
NP300GB
Revision O.0

CTX 300
ANALOGIC GAS DETECTOR
USER MANUAL
NP300GB
Rev.O.0
13
5Maintenance
The adjustment operations in this paragraph are reserved for authorized, trained
personnel because they may compromise detection reliability.
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.
5.1 Calibration
5.1.1 Recommendations
Calibration consists of adjusting the zero of the clean air sensor and adjusting sensitivity with a
test gas. Adjustments are made at the sensor level.
Equipment needed to calibrate the detector correctly:
•Flexible plastic tubing (Figure 15, ref. 2).
•Manometer and regulator valve for the compressed gas cylinders (rep. 3).
•0 to 60 l/h flow meter (if the cylinder is not equipped with one).
•Calibration pipe (ref. 1), which may vary depending on the nature of the gas (see pages
19 and following).
•Test gas cylinder (ref. 4).

CTX 300
ANALOGIC GAS DETECTOR
USER MANUAL
14
NP300GB
Revision O.0
Figure 15: sensor calibration assembly.
Zero adjustment should be performed in a gas and vapor free area. If this is not possible, synthetic
bottled air can be injected at a rate of 60 l/h.
Use a bottle of test gas to adjust sensor sensitivity (concentration close to the alarm threshold or
corresponding to 30% of the measurement range at a minimum). The recommended rate is 60
l/h.
Note: when dealing with dangerous gases, you MUST consult a specialized TELEDYNE
OLDHAM SIMTRONICS technician or use another sensor pack recently pre-calibrated at a
factory.
The detector should be calibrated using the intended flow-
rate. The actual
concentration of gas may be underestimated if the detector was calibrated with too
high of a flow rate.
5.1.2 CTX 300 calibration
5.1.2.1 1st case: CTX 300 with display (excluding O2)
•The sensor is operating: the green light (ref. 1) is lit and
the display screen shows the measurement level.
Figure 16
•
Verify that the sensor is located in a clean-air
environment. If not, inject synthetic air at a flow rate of
30 l/h.
Figure 17
•Wait for the measurement to stabilize (displayed on
screen) and adjust the zero by using the ZERO
potentiometer located on the sensor pack (ref. 2).
•Inject the recommended calibration gas at a flow rate
of 30 l/h.
•
Wait for the measurement to stabilize.

CTX 300
ANALOGIC GAS DETECTOR
USER MANUAL
NP300GB
Rev.O.0
15
•Adjust the sensitivity by using the sensitivity
potentiometer located on the sensor pack (rep. 1).
• Stop injecting the calibration gas.
•Remove the gas injection pipe, then wait and verify that the signal returns to zero. Repeat
procedure if it does not.
•
Calibration is complete.
5.1.2.2 2nd case: CTX 300 without display (except for O2et SC)
•
The sensor is operating.
•
Verify that the sensor is located in a clean-air
environment. Use the calibration kit and follow all
recommendations.
•
Connect a voltmeter to the AF+ and AF- terminals
(caliber mV/DC).
Figure 18
•
Wait for the signal to stabilize and adjust the zero by
using the ZERO potentiometer located on the sensor
pack (Figure 19, ref. 2). The output signal should be
0 mV.
•Now inject the recommended test gas at a flow rate
of 30 l/h. Use the calibration kit and follow all
recommendations.
•Wait until the signal has stabilized.
Figure 19
•
Read the mV value on the voltmeter (
Figure
18), with the full scale at 1600 mV.
Calculate the value to be read as a function of your test gas.
•
Adjust the displayed value using the potentiometer (
Figure
19, rep.1).
Example
- CO sensor.
- Scale 0-300 ppm.
- Standard gas concentration: 100 ppm.
-
Reading: 533 mV.
•
Shut off the calibration gas injection.
•Withdraw the gas injection pipe.
•Then wait and check that the scale has returned to zero. Otherwise, repeat the entire
procedure.

CTX 300
ANALOGIC GAS DETECTOR
USER MANUAL
16
NP300GB
Revision O.0
5.1.3 CTX 300 calibration for O2
This sensor is an Oxygen type.
5.1.3.1 1st case: CTX 300 O2 with display
•See paragraph 1st case: CTX 300 with display, on
page 14. Proceed only with adjusting sensitivity (rep.
1) by injection of test gas.
Figure 20
5.1.3.2 2nd case: CTX 300 O2 without display screen nor LED
•
See paragraph 2nd case: CTX 300 without display on
page 15. Proceed only with adjusting sensitivity (rep.
1) by injection of test gas.
Signal value mV:
- 1600 mV for full scale, means 30 % O2.
- 1115 mV for 20.9 % O2.
- 0 mV for 0% O2.
Figure 21
Note: the signal sent from the CTX300 (toxic or oxygen)
sensor to the control unit can be measured on the main circuit
by connecting a millivoltmeter to the pins designed for this
purpose (Figure 22).
- 400 mV corresponds to 4 mA.
- 2000 mV corresponds to 20 mA.
Figure 22