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www.acornfiresecurity.com CTX 300 User manual Analogic Gas Detector Part Number: NP300GB Revision: N.0 → 04/2019 The Fixed Gas Detection Experts www.acornfiresecurity.com...
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April 2019 All rights reserved. No reproduction of all or part of this document, in any form, is permitted without the written consent of Oldham Simtronics S.A.S. All information provided in this document is accurate to the best of our knowledge.
www.acornfiresecurity.com 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 ........
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www.acornfiresecurity.com Chapter 9 | Annex ..............45 Indications for calibrating the CTX 300 SC ..........45 CTX 300 overview ..................46 CTX 300 User manual www.acornfiresecurity.com...
The aim of this manual is to supply simple and accurate information to the user. 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.
www.acornfiresecurity.com 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.
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 Simtronics has been informed of such damage. 1 – General information...
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www.acornfiresecurity.com CTX 300 User manual www.acornfiresecurity.com...
Chapter 2 | Introduction General Information CTX300 gas detectors are designed to measure toxic gases, CO 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.
www.acornfiresecurity.com 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. ■...
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www.acornfiresecurity.com 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). CTX 300 User manual www.acornfiresecurity.com...
Screw CHC LI2 6902218 Stainless Electrical connections Wiring specifications If needed, consult the grounding instructions for Oldham Simtronics instruments and related connection materials in Annex 1. Connections for the various types of sensors Wire CTX 300 (TOX/OX) CTX 300 (TOX/OX)
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Terminal number (+) V DC power supply: Output signal: Both wires are the 4-20 mA 2-wire loop. +24 VDC Control unit Detector Signal Figure 6: connection of a 2-wire sensor to an Oldham Simtronics control unit. CTX 300 User manual www.acornfiresecurity.com...
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Other control unit +24 VDC Detector Signal Figure 7: Connection of a 3-wire CTX300 sensor to a non-Oldham Simtronics control unit. Maximal load = 200 Ω. Power supply 15 ≤ Vcc ≤ 32. 18 ≤ Vcc ≤ 30 for CO sensor.
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Operating mode 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 ■...
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www.acornfiresecurity.com 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 3 - Installation and connection www.acornfiresecurity.com...
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www.acornfiresecurity.com Chapter 4 | Powering up and use 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.
www.acornfiresecurity.com 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. ≥...
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. OLDHAM SIMTRONICS cannot be held responsible for their enforcement. Calibration...
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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 Oldham Simtronics technician or use another sensor pack recently pre-calibrated at a factory.
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www.acornfiresecurity.com ■ Wait for the measurement to stabilize (displayed on screen) and adjust the zero using 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. ■...
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www.acornfiresecurity.com case: CTX 300 without display (except for O et SC) ■ The sensor is operating. ■ Verify that the sensor is located in a clean-air environment. calibration follow recommendations. ■ Connect a voltmeter to the AF+ and AF- terminals (caliber mV/DC). Figure 18 ■...
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www.acornfiresecurity.com ■ 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.
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- 0 mV for 0% O Figure 21 Note: 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).
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www.acornfiresecurity.com CTX 300 calibration (for Semiconductor) This is a Semiconductor type sensor. ■ Flip the switch (rep. 1) into the CAL position. Figure 23 ■ Ensure that the sensor is in clean air, otherwise inject synthetic air into it using the calibration kit and referring to the recommendations below.
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www.acornfiresecurity.com ■ Connect a voltmeter as indicated and adjust, using potentiometer p5 (ref. 1). The output signal must be equal to 880 mV. ■ Next, inject the calibration gas at a flow rate of 30 l/h (refer to paragraph Indications for calibrating the CTX 300 SC, on page 45).
www.acornfiresecurity.com Replacing a sensor Sensors must be replaced: ■ When calibration is no longer possible (no sensitivity); ■ During preventative maintenance. The replacement sensor should be identical to the original sensor (same gas, same range). After a sensor has been replaced, a calibration or test (for pre-calibrated sensors) must be conducted.
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www.acornfiresecurity.com CTX 300 User manual www.acornfiresecurity.com...
Chapter 6 | Spare parts List of spare parts for different detectors. Replacement parts must imperatively be guaranteed origin Oldham Simtronics. Otherwise, material safety could be jeopardized. CTX/COX 300 toxic or oxygen sensors Description Picture 6147868 CTX 300 tool kit.
www.acornfiresecurity.com Chapter 7 | Certification The following page reproduces the EC declaration of conformity. 7 - Certification www.acornfiresecurity.com...
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www.acornfiresecurity.com CTX 300 User manual www.acornfiresecurity.com...
(outer diameter 6 to 11 mm) 15 to 32 V DC Power supply CTX 300 (Tox and O ) without display unit: 27 mA CTX300 CO2 without display: 60mA Power consumption CTX 300 with display unit: 110 mA CTX 300 semiconductor versions: 100mA -20°C to + 50°C, -4°F to + 122°F with display (sensor...
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www.acornfiresecurity.com 30.0% -20°C to +50°C 10% to 95% RH +/-1.5% 30.0% -40°C to +50°C 10% à 95% RH +/-1.5% 100% +5°C to +40°C 10% to 95% RH +/-1.5% <20 -20°C to +50°C 10% to 95% RH +/-1.5% -20°C to +50°C 10% to 95% RH +/-1.5% 1000...
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www.acornfiresecurity.com 3.00 -20°C to +50°C 10% to 95% RH +/-2% COCl 3.00 -20°C to +40°C 10% to 95% RH +/-1.5% Methylene -20°C to +55°C 10% to 95% RH chloride Methyl chloride -20°C to +60°C 10% to 95% RH -20°C to +50°C 10% to 95% RH Toluene 2000...
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www.acornfiresecurity.com Chapter 9 | Annex Indications for calibrating the CTX 300 SC This information relates to the CTX 300 semiconductor. Measurement After sale service Gas types Test gas range standard gas Methyl Chloride 2000 ppm H = 190 6313545 500 ppm 50 ppm CH ppm ±...
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www.acornfiresecurity.com CTX 300 overview Figure 27: CTX 300 with sensor pack and display – overview. CTX 300 User manual www.acornfiresecurity.com...