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Summary of Contents for PureAire TX-KE
- Page 1 PureAire Monitoring Systems, Inc. 2/22/2000 Models TX-KE and TX-KP Toxic Gas Transmitters Instruction Manual PureAire Monitoring Systems, Inc. 557 Capital Dr. Lake Zurich, IL. 60047 Phone: 847-726-6000 Fax: 847-726-6051 Toll-Free: 888-788-8050 www.pureairemonitoring.com...
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Page 2: Table Of Contents
PureAire Monitoring Systems, Inc. 2/22/2000 Table of Contents 1: Introduction ....................2 1.1 Model TX-KE ..................2 1.2 Model TX-KP ..................2 2: Specifications ....................5 2.1 Performance Specifications ..............5 2.2 Signal Outputs ..................5 2.3 Electrical Requirements ................. 5 3: Installation .................... -
Page 3: 1: Introduction
These systems may be used as either stand-alone detection systems, linked to dedicated controllers, or connected to facility-wide surveillance systems. The main difference between the TX-KE and TX-KP are the components used to make them suitable for use in hazardous areas. - Page 4 4-20 mA output and 24 VDC power cable. WARNING: This connection must be made using an explosion-proof cable gland or connector to seal the inlet if the TX-KE is being installed in a hazardous area. 5. Cable Connection Terminal Block — The 4-20 mA output and 24 VDC connections are made on this terminal block.
- Page 5 PureAire Monitoring Systems, Inc. 2/22/2000 1.2.2 Component Identification GAS DETECTOR Common TX-KP Bionics I n strument Co. , Ltd. 1 2 3 4 1. Concentration Display — A local analog or digital readout which displays the measured concentration of the target gas.
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Page 6: 2: Specifications
2.1 Performance Specifications Sensor Type: Diffusion type electrochemical sensors: TX-KE — Type DP and Type HP sensors TX-KP — Type MP, KP, and TP sensors Accuracy: ±5% full scale. Operating Temperature: -20° to +50°C (-4° to +122°F). -
Page 7: 3: Installation
6. Replace the transmitter cover. 3.1.2 Model TX-KE (Intrinsically Safe) CAUTION: If the Model TX-KE is installed in a hazardous area, it must be wired through a safety barrier installed outside of the hazardous area. PureAire Monitoring Systems recommends the use of the Model MTL788+ Safety Barrier for intrinsically safe wiring. - Page 8 500 Ω Shield Shield Shield Intrinsically Safe Earth TX-KE Transmission Cable Wiring — Hazardous Areas In the event that the TX-KE is installed in a non-hazardous area, it may be wired as follows: + (White) - (Black) Shield Transmission Cable Inlet NPT 3/4"...
- Page 9 PureAire Monitoring Systems, Inc. 2/22/2000 3.1.3 Model TX-KP (Explosion-Proof) The transmission cable should be connected to terminal block CN3 in the explosion-proof housing. The white (+) wire connects to terminal #1, the black (-) to terminal #2, and shield (S) to terminal #3.
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Page 10: Sensor Installation
PureAire Monitoring Systems, Inc. 2/22/2000 3.2 Sensor Installation 3.2.1 Shorting Plug Some sensors are shipped with a shorting plug between the “W” and “C” pins on the sensor cell. This must be removed prior to installation. Short Pin Sensor Cell — Top View 3.2.2 Sensor Installation... - Page 11 PureAire Monitoring Systems, Inc. 2/22/2000 Sensor Cable Type Wire Color Location 3-electrode sensor Black Terminal 1 White Terminal 2 Terminal 3 Open Terminal 4 2-electrode sensor Open Terminal 1 White Terminal 2 Black Terminal 3 Shield Terminal 4 SENSOR CABLE...
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Page 12: 4: Normal Operation
PureAire Monitoring Systems, Inc. 2/22/2000 4: Normal Operation Model TX-KE and TX-KP gas detectors are designed for use with a PureAire controller or other control system capable of receiving a 4-20 mA signal. During normal operation, the instrument will display the measured gas concentration on its local analog or digital readout and output a corresponding 4-20 mA analog signal. -
Page 13: Loss Of Power Indicator
4.3 Loss of Power Indicator In the event the TX-KE or TX-KP loses VDC power, the 4-20 mA analog output signal drops to 0. The green LED on the face of the instrument will also go out. -
Page 14: 5: Maintenance & Calibration
5: Maintenance & Calibration Maintenance and calibration should be performed only by qualified personnel. 5.1 Sensor Cell Removal and Installation Model TX-KE and TX-KP gas detectors use a plug-in sensor cell which is extremely simple to remove and install. 5.1.1 Sensor Cell Removal 1. -
Page 15: Calibration
WARNING: Before performing a calibration, it is the user’s responsibility to confirm that they area is free of combustible gas. IMPORTANT: If the TX-KE or TX-KP is connected to an external alarm or control system, the alarm or control system should be disabled or placed in a standby mode during calibration to avoid an accidental alarm. - Page 16 Bion ics Ins tru m ent Co ., L td . Bion ics Ins tru ment Co ., L td . Bion ics Ins tru m ent Co ., L td . Calibration Adapter — Model TX-KE GAS DETECTOR GAS DETECTO R...
- Page 17 CAUTION: Be sure to observe all safety guidelines when generating and using calibration gases. NOTE: Gas generation kits are available through PureAire. These kits include instructions and materials for generating calibration gases and precise methods for accurately measuring the concentration of these gases.
- Page 18 PureAire Monitoring Systems, Inc. 2/22/2000 11. Adjust the instrument’s span potentiometer until the displayed gas reading matches the concentration value of the calibration gas. Note: Depending on the gas sensor a clockwise or counterclockwise rotation increases the value; a counterclockwise or clockwise rotation decreases the value.
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Page 19: Electrolyte Replenishment
PureAire Monitoring Systems, Inc. 2/22/2000 5.3 Electrolyte Replenishment Renewable sensor cells CAUTION: Be sure to adhere to your facility’s chemical handling guidelines and procedures. 1. Remove the sensor as outlined in Section 5.1.1. 2. Remove nut, membrane retainer ring, membrane, O-ring, and silicon sheet (depending on sensor model). - Page 20 PureAire Monitoring Systems, Inc. 2/22/2000 4. Hold the sensor in your hand with the sensing electrode up. Pour 10 cc’s of fresh electrolyte into the sensor and rinse. Discard into the beaker. Nozzled Electrolyte Bottle Sensing Electrode Electrolyte Pressure Compensation Port Place the sensor over the beaker as shown and pour the rinsed electrolyte into the beaker.
- Page 21 PureAire Monitoring Systems, Inc. 2/22/2000 Refill the sensor cell with fresh electrolyte until it reaches ½ the MAX mark. Fill level ½ the MAX mark . Nozzled Electrolyte Bottle Sensing Electrode Electrolyte Pressure Compensation Port 7. Wipe the sensing electrode and the surrounding area with a dry paper tissue.
- Page 22 PureAire Monitoring Systems, Inc. 2/22/2000 8. Place a new silicone sheet (if used) and O-ring on the sensor. Make sure that the area is dry of electrolyte. O-ring Silicon Sheet 9. Apply a drop of electrolyte on the sensing electrode.
- Page 23 PureAire Monitoring Systems, Inc. 2/22/2000 11. Place the retainer ring over the membrane and then place the box nut over the retainer ring. Turn box nut clockwise until hand tight; continue tightening until the box nut can no longer be moved by hand.
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Page 24: Sensor Calibration Kits
Six months has passed without membrane, electrolyte, or sensor replacement. The PureAire Calibration Kit (optional) is recommended for calibration. 5.4.1 Gas Generation and Calibrating Kits For generating a calibrating gas, the following PureAire Gas Generation Kits are recommended. They are available by separate order. Calibration Kit Model... - Page 25 PureAire Monitoring Systems, Inc. 2/22/2000 5.4.2 Optional Calibration Equipment The following equipment is available from PureAire Monitoring Systems to facilitate gas calibration: Part Number Description Quantity PUMP2N High Flow Sampling Pump 690100 Calibration Cap for “D” Type Sensor Cells 690200 Calibration Cap for “FPN”...
- Page 26 PureAire Monitoring Systems, Inc. 2/22/2000...
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