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ctx 300
User Manual
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Oldham ctx 300 User Manual

User manual
CTX 300
Part Number: NP300GB Revision: K.1
The Fixed Gas Detection Experts
2
CTX 300
User manual
Copyright 2015 by Oldham S.A.S. April 2015 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
Contents
3
Contents
Chapter 1 | General Information .............................................. 5
User Manual ............................................................................................... 5
Symbols used ............................................................................................. 5
Safety instructions ...................................................................................... 6
Important information ................................................................................. 6
Liability limits .............................................................................................. 7
Chapter 2 | Introduction ........................................................... 9
General Information ................................................................................... 9
Composition ............................................................................................. 10
Chapter 3 | Installation and connection ................................ 11
Installing the detectors ............................................................................. 11
Electrical connections .............................................................................. 13
Chapter 4 | Powering up and use .......................................... 19
Powering up ............................................................................................. 19
4-20 mA analog output ............................................................................. 20
Chapter 5 | Maintenance ........................................................ 21
Calibration ................................................................................................ 21
Replacing a sensor .................................................................................. 35
Disposal .................................................................................................... 35
Chapter 6 | Spare parts .......................................................... 37
CTX/COX 300 toxic or oxygen sensors ................................................... 37
CSC 300 semiconductor sensors............................................................. 40
CTX 300 – CO2 sensors ........................................................................... 41
Chapter 7 | Certification ......................................................... 43
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CTX 300
User manual
Chapter 8 Technical specifications ....................................... 47
Chapter 9 | Annex ................................................................... 51
Wiring specification .................................................................................. 51
Indications for calibrating the CTX 300 SC .............................................. 53
CTX 300 overview .................................................................................... 54
1 – General information
5
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.
|
Chapter 1 | General Information
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 Oldham for additional information.
The aim of this manual is to supply simple and accurate information to the user. Oldham 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, Oldham 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 Oldham.
Symbols used
6
CTX 300
User manual
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.
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.
Safety instructions
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).
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.
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 – General information
7
Liability limits
Neither Oldham 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 Oldham has been informed of such damage.
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CTX 300
User manual
2 - Introduction
9
Chapter 2 | Introduction
General Information
CTX300 gas detectors are designed to measure toxic gases or 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).
10
CTX 300
User manual
Composition
Sensor type
CTX 300
Toxic
Oxygen
Semi­conductor
CO2
Gases detected
Common toxic gases detected.
Oxygen.
- Combustible gas.
- Solvents.
- Some Freons.
CO2.
Detection method
Electrochemical sensors (1).
Electrochemical sensor.
Semiconductor sensor.
Infrared absorption.
Type of sensor pack
Pre-calibrated removable sensor pack (2).
Pre-calibrated removable sensor pack: 0-30% scale or 0-100% volume.
Removable sensor pack, not pre­calibrated.
Removable sensor pack Infrared column, not pre-calibrated.
Options
With display.
With display.
Certification
None.
None
None
None
(1) Specific to each gas. (2) Choice between several scales.
3 - Installation and connection
11
Chapter 3 | Installation and connection
Installing the detectors
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 (CO
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.
and Freons, for example) place the detector
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.
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CTX 300
User manual
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).
3 - Installation and connection
13
Ref.
Qty
Description
Code
Material
1 1 Brace
6132380
Stainless
2 4 Washer A25 ACCD
6905518
Stainless
3 4 Screw CHC LI2
6902218
Stainless
Wire
CTX 300 (TOX/OX)
with display
CTX 300 (TOX/OX)
without display
CTX 300 SC/CO2
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
Figure 4: ceiling mounting with a brace. The fixing drawing is identical to this of the wall mount.
Electrical connections
Wiring specifications
If needed, consult the grounding instructions for Oldham instruments and related connection materials in Annex 1.
Connections for the various types of sensors
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CTX 300
User manual
Connection of a 3-wire sensor to an Oldham control unit
Wire
Terminal number
(+) V DC power supply:
3
(-) V DC power supply (masse 0 V):
2
Output signal:
1
Wire
Terminal number
(+) V DC power supply:
3
Output signal:
1
Control unit
Detector
Control unit
Detector
+24 VDC
Signal
+24 VDC 0V
Signal
Figure 5: connection of a 3-wire sensor to an Oldham control unit.
Connection of a 2-wire sensor to an Oldham control unit
Both wires are the 4-20 mA 2-wire loop.
Figure 6: connection of a 2-wire sensor to an Oldham control unit.
3 - Installation and connection
15
Other control
unit
Detector
+24 VDC 0V
Signal
Other control
unit
Detector
+24 VDC
Signal
Connection of a 3-wire CTX300 sensor to a non-OLDHAM control unit with an internal power supply
Figure 7: Connection of a 3-wire CTX300 sensor to a non-OLDHAM control unit.
(R) Maximal load = 200 Ω. (A) Power supply 15 ≤ Vcc ≤ 32. 18 ≤ Vcc ≤ 30 for CO2 sensor.
I max = 130 mA.
Connection of a 2-wire 4-20mA sensor to a non-Oldham control unit and to an internal power supply
Figure 8: Connection of a 2-wire 4-20mA sensor to a non-Oldham control unit.
(A) Power supply 15< VCC<32V. I max = 30 mA.
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CTX 300
User manual
Operating mode
■ 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 various types of sensors on page 13.
■ Return the display circuit to its original
position and replace the cover.
Figure 11
CTX300 with display
3 - Installation and connection
17
■ 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 without display
18
CTX 300
User manual
4 – Powering up
and use
19
■ 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 circuit board.
Figure 15: CTX 300 SC main circuit board.
Chapter 4 | Powering up and use
Powering up
In case of a problem, verify that the maintenance switch (ref. 1), located on the main circuit, is in the MES (measure) position.
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CTX 300
User manual
Figure 16: CTX 300 CO2 main circuit board. This card does is not equipped with a MES-CAL switch.
4-20 mA analog output
For CTX 300 sensors, except for the CO2 sensor, the 4-20 mA output current is proportional to the gas level.
Notes:
■ The CO
■ MX 15 and MX 32 control units that integrate with the linearization of the CO
sensor are available upon request.
■ The MX 62 integrates with the linearization of CO
The various states of the 4-20 mA output are:
■ 1 mA to indicate a fault.
■ = 2 mA in Calibration position, except for the CO
calibration function.
■ Between 4 and 20 mA for measurement values.
■ ≥ 20 mA if levels exceed measurement range.
sensor can be equipped with a linearization board.
2
sensors.
2
sensor that does not have a
2
2
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