300 SERIES LEL DETECTOR DETECTOR-TRANSMITTER FOR COMBUSTIBLE, TOXIC GASES AND OXYGEN O P ER A T IO N A N D M A IN T EN A N C E M ANUA L Ref.
GAS DETECTION Thank you for purchasing an INDUSTRIAL SCIENTIFIC instrument. We appreciate your business. We trust that our commitment to the technical excellence of our products will ensure your complete satisfaction. Please read the following document carefully.
CONTENTS I. INTRODUCTION............................................................................................................................5 1. 2. General Information .....................................................................................................................5 Composition .................................................................................................................................5 II. INSTALLATION AND CONNECTIONS.......................................
I. INTRODUCTION 1. General Information 300 Series gas detectors are designed to measure combustible toxic gases or vapors and oxygen. With robust materials, a specifically-adapted design, appropriate accessories, INOX bolts, and a polyamide case (IP66) (IP55 for the CO2 version), 300 series detectors are designed to withstand the roughest conditions. . 2.
Factors to consider when determining the best placement for the detector: ⇒ 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) Detectors should always be located in an easily accessible location for maintenance purposes.
REF. 1 2 3 No. 1 4 4 DESCRIPTION CEX / CTX300 BRACE CHC LI2 SCREW A25 ACCD WASHER OFSA REF 6132380 6902218 6905518 MATERIAL INOX INOX . 2. ELECTRICAL CONNECTIONS 2.1. Wiring specifications If needed: consult the grounding instructions for INDUSTRIAL SCIENTIFIC instruments and related connection materials in Annex 1. 2.2.
a) Connection of a 3-wire sensor to an INDUSTRIAL SCIENTIFIC central controller 1 wire (+) continuous power supply → No. 3 1 wire (-) continuous power supply (0 volt mass) → No. 2 1 output signal wire → No. 1 - Detector Control Unit + 24 Vcc 3 2 1 3 2 1 GND Signal b) Connection of a 2-wire sensor to an INDUSTRIAL SCIENTIFIC central controller - 1 wire (+) → No. 3 1 signal wire → No.
d) Connection of a 2-wire 4-20mA sensor to a non-INDUSTRIAL SCIENTIFIC controller and to an internal power supply. 24 Vcc (+) Control unit « other» + ALIM 3 2 1 (1) signal (1) 15
2.4. Operating mode a) CTX300 with display Ref. 2 Ref. 1 FIG. 1 - Remove the 4 screws (Ref. 1 in Fig. 1) - Remove the cover (Ref. 2 in Fig. 1) Rep33 Ref. Rep44 Ref. FIG. FIG 22 - Gently remove the screw (Ref. 3 in Fig. 2) - Completely remove the screw (Ref. 4 in Fig. 2) Ref. 5 Ref. 6 FIG. 3 - Turn the display circuit as shown above (Ref. 5 in Fig. 3) - Connect the cable (see 2-3: Connections for the various types of sensors) to the connector (Ref. 6, Fig.
III. POWERING UP AND USE 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 1 in Fig 4) and a value will appear on the display screen (Ref. 2 in Fig 4). Ref. 2 Ref. 1 Fig. 4 In case of a problem, verify that the maintenance switch (Ref. 1), located on the main circuit is in the “MES” (measure) position. Ref. 1 CIRCUITBOARD CTX 300 CAL MEAS CIRCUITBOARD CTX 300 SC Fig. 5 Fig. 6 Ref.
CO2 CIRCUIT Fig. 7 2. 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 CO2 sensor can be equipped with a linearization board. • MX 15 and MX 32 central controllers that integrate with the linearization of the CO2 sensor are available upon request • The MX6 2 integrates with the linearization of CO2 sensors.
If a detector does not react upon contact with gas, it must be calibrated. Calibration frequency should be adapted based on test results. However, it should not be greater than one year. Industrial Scientific recommends using a test gas to calibrate detectors. The site manager is responsible for implementing the safety procedures on his site. Industrial Scientific is not respons ible for implementing safety procedures.
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 60l/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 60l/h. Note: When dealing with dangerous gases, you MUST consult a specialized INDUSTRIAL SCIENTIFIC technician or use another sensor pack recently pre-calibrated at a factory.
1.3.CTX 300 calibration Method 1: CTX 300 with display (excluding O2 , see page 17) CAL Ref. 2 Ref. 1 Fig. 9 Ref. 3 The sensor is operating: the green light (Ref. 1, Fig. 10) is lit and the display screen shows the measurement level. Flip the maintenance switch (Ref. 2, Fig 9) into the “CAL” (calibration) position: the yellow light (Ref. 3, Fig. 10) will be lit and the sensor will send a 2 mA current to the central controller (maintenance mode).
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). Flip the maintenance switch into the “MES” (measure) position. The yellow light will turn off. CALIBRATION COMPLETE Method 2: CTX 300 without display except for O2 – SC – CO2 The sensor is operating: Flip the maintenance switch (Ref.
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, read the mV value on the voltmeter (Fig. 13, rep 1), with the full scale at 1600 mV, calculate the value to be read as a function of your test gas. Adjust using the potentiometer (Fig. 14, rep 2).
1.5. CSC 300 (semiconductor) calibration Flip the switch (Ref. 1, Fig. 17) into the “CAL” position. Fig. 17 MES Rep 1 CAL Circuit du capteur CTX/CSC 300 Ensure that the sensor is in clean air, otherwise inject synthetic air into it using the calibration kit and referring to the recommendations below: Important: to correctly calibrate a sensor equipped with a semi-conductor cell, use of a humidifier kit is MANDATORY (ref: 6335919) – Fig. 18 Vers capteur To detector Entrée gaz Gas Fig.
(P 5) Ref. 1 Ref. 2 Ref. 3 Fig. 19 V Next, inject the calibration gas at a flow rate of 30 l/h (See Annex 2). Wait for the signal to stabilize and adjust the signal with the sensitivity potentiometer (Ref. 2, Fig. 19). U = 880 mV + 3520 mV Sensor measurement range The output signal should be: EXAMPLE: Sensor measure (% of full range) 0 50 Output signal (mV) 100 4400 880 2640 Stop injecting the calibration gas and verify that the reading returns to zero (880 mV).
! ! WARNING! ! Adjustment If the current loop of the output signal has an impedance of 500 ohms, the power supply should never fall below 23 V DC. OUTPUT SIGNAL ZERO ADJUSTMENT = 4 mA Inject nitrogen at a rate of 30 l/h. On the X1 terminal board, place an ammeter between terminals 1 and 2 (- ). With the potentiometer Z, adjust the current to 4 mA. With the ammeter still connected, inject the test gas at a rate of 60 l/h. Adjust the sensitivity with the potentiometer S (Ref. 1, Fig 21).
CALIBRATION CURVES CO2 – IR Transmitter Output Signal 21
22 DISPLAY Display CO2 DETECTOR 0-10000 ppm (1%) measurement range Concentration in ppm CO2
23 DISPLAY Display CO2 DETECTOR 0-5% CO2 measurement range Concentration in % CO2
24 DISPLAY Display CO2 DETECTOR 0-10% CO2 measurement range Concentration in % CO2
25 DISPLAY Display CO2 DETECTOR 0-50% CO2 measurement range Concentration in % CO2
2. 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. 3.
GAS INTRODUCTION DEVICE 6331141 GAS FLOW HEAD 6327905 DEVICE FOR REMOTE GAS INTRODUCTION 6327906 ANTI-PROJECTION DEVICE 6331166 REPLACEMENT FILTERS PTFE PROTECTOR FILTER ACTIVE CHARCOAL PROTECTOR FILTER 6335953 6335954 REPLACEMENT SENSORS 6313662 Standard explosimetric sensor REPLACEMENT PARTS Metallic cable glands (6-11 mm) Double compression cable gland for armored cable Self-adhesive front panel Sticker labels 6143442 6143395 6815918 6815923 27
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PRE-CALIBRATED TOX SENSOR PACK CTX 300 SENSOR PACK 100 ppm CO – 300 ppm CO – 1,000 ppm 6313627 6313628 6313629 CO – 1% vol CO – 10% vol 6313631 6313632 CTX 300 SENSOR PACK H2S - 30 ppm H2S – 100 ppm H2S – 1,000 ppm 6313633 6313634 6313635 CTX 300 SENSOR PACK NO -100 ppm NO – 300 ppm NO – 1,000 ppm 6313636 6313637 6313638 CTX 300 SENSOR PACK NO 2 -10 ppm NO 2 – 30 ppm 6313639 6313640 CTX 300 SENSOR PACK ETO - 30 ppm 6313645 CTX 300 SENSOR PACK SO 2 -10 ppm SO 2 – 30 ppm SO 2 – 100 ppm 6313646 63
4.3 CSC300 Semiconductor Sensor DESCRIPTION TOOLS OFSA REF CSC 300 TOOL KIT 6147868 ACCESSORIES MOUNTING BRACE + bolts (CSC 300 ceiling mount) 6322420 GAS COLLECTOR (INOX) 6323607 Calibration KIT (humidifier filter + pipe) 6335919 HUMIDIFIER FILTER 6335918 AVAILABLE SENSORS CSC50 FG 318 SENSOR SENSOR SENSOR SENSOR SENSOR WC30CLM WC3050L WC30F22 WC30F13 WC30C0V REPLACEMENT PARTS MOTHERBOARD PG9 CABLE GLAND 4.
V. Particular Specifications for use in Explosive Atmospheres in Accordance with the European ATEX 94/9/CE Directive. The CEX 300 detector meets all requirements of the European ATEX 94/9/EC Directive pertaining to explosive atmospheres. With performance test tested by INERIS (the French National Institute for Industrial Environment and Risks), the CEX 300 is designed to measure explosive gases and is categorized as a security device and is used to limit the risks of explosion.
2.1. Technical Specifications and Particular Instructions for the CEX300 Explosive Gas Detector 2.1.1. Metrological Specifications Sensor type C1000 Max. concentration 100% LEL System Catalytic Life expectancy > 36 months Storage Keep away from extreme temperatures (10°C < T < 35°C ) (10% < Relative Humidity < 60%) 6 months max.
2.1.2 Particular Precautions for Combustible Gas Detectors • The sensors may be desensitized if exposed to certain poisons: silicate vapors at concentrations > 10 ppm, chlorinated or sulfated products at concentrations > 100 ppm A lack of oxygen ( <15% O2 ) or an excess of oxygen ( >23% O2 ) can respectively cause an under estimation or an over estimation of the actual gas measurement. Sensors must be placed upside down during installation. • • 2.1.
Example (first line of the table): calibrate an “Acetone” detector with a 1% volume butane test gas Value to display: 1% (injected butane) x 100 x 0.95 (butane/acetone coefficient) = 63% LEL 1.5% (LEL butane) Note: - 3 LELs vary according to the source. The LEL values reported here come from European standard EN 50054 Coefficients are accurate to ± 15% Markings: OLDHAM 0080 CEX 300 II 2GD IP66 U max.: 2.8V I max.: 0.4 A P max = 0.
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ANNEXES ANNEX 1: GENERAL WIRING SPECIFICATIONS ANNEX 2: INSTRUCTIONS FOR CALIBRTING THE CTX 300 SEMICONDUCTOR ANNEX 3: VIEW OF THE CTX 300 38
ANNEX 1 WIRING SPECIFICATION SUBJECT This specification defines the general principles that apply to the design and manufacture of grounding devices for INDUSTRIAL SCIENTIFIC instrumentation. REFERENCE DOCUMENTS The electrical installation shall comply with French regulations in force, with all European directives, all AFNOR standards and codes in force, insofar as they apply, as well as the client’s general and particular specifications.
The connection to the metal masses grounding network is made with a bare galvanized steel conductor. The loop resistance for the central controller/sensor cable connection will vary according to the type of sensor and type of central controller being used. Refer to the technical manuals appropriate for your use. ACCEPTABLE CABLE TYPES SUBJECT TO ADHERENCE TO THE RECOMMENDATIONS OF THIS SPECIFICATI Examples (yellow/green not included) Non-exhaustive list.
ANNEX 2 CTX 300 SEMI CONDUCTEUR Gas types Sensor type and reference number 6313545 Measurement Ranges Methane CH4 100% LEL Hydrogen H2 100% LEL Butane C4H10 Propane C3H8 SAV test gas 20% LEL – 1 % CH4 100% LEL 20% LEL – 0.8 %H2 100% LEL 20% LEL – 0.37 %C4H10 Methyl Chloride CH3Cl 500 ppm 20 % LIE – 0.
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