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Summary of Contents for PureAire Monitoring Systems BC TX-FM
- Page 1 Model TX-FM/FN Sensor Head Instruction Manual PureAire Monitoring Systems, Inc. 1140 Ensell Road Lake Zurich, Illinois 60047 Phone: 847-726-6000 Fax: 847-726-6051 Toll-Free: 888-788-8050 Pureairemonitoring.com Rev 1.0 August 2023...
- Page 2 That’s just one way PureAire takes that extra step to ensure your complete satisfaction. Thank you again for investing in PureAire Monitoring Systems for your monitoring needs and I’m proud to welcome you to our family of valued and satisfied customers.
- Page 3 PureAire Monitoring Systems, Inc.
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Page 4: Table Of Contents
PureAire Monitoring Systems, Inc. Table of Contents 1: Introduction................... 3 1.1 Component Identification ............. 3 1.2 Component Identification TX-1100FK ........4 2: Specifications ..................6 2.1 Performance Specifications ............6 2.2 Gas Detection System ..............6 2.3 Signal Outputs ................6 2.4 Electrical Requirements ............... -
Page 5: 1: Introduction
PureAire Monitoring Systems, Inc. 1: Introduction TX-FM/FN series sensor heads are self-contained gas detection systems suitable for a wide range hazardous gases, including ammonia, chlorine, HCl, and hydrogen. Each system consists of an amperometric, electrochemical sensor cell and two-wire transmitter. TX-FM/FN series sensor heads may be used as stand- alone gas detectors or linked to an optional controller (RX-1G) or your own centralized control and surveillance system. -
Page 6: Component Identification Tx-1100Fk
PureAire Monitoring Systems, Inc. 3. Sensor Cable Terminal Block — This terminal is used to connect the sensor cable. 4. Span Potentiometer — This potentiometer is used to adjust the sensitivity of the sensor cell. It should only be adjusted when calibrating the instrument. - Page 7 PureAire Monitoring Systems, Inc. 1 & 2 1.2.2 Front View 1. Sensor Cover — This cover protects the gas sensor. It fastens directly to the transmitter Nema 4X enclosure. 2. Gas Sensor — An amperometric, electrochemical sensor which detects and measures the target gas.
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Page 8: 2: Specifications
PureAire Monitoring Systems, Inc. 2: Specifications NOTE: Due to our commitment to continual product improvement, all specifications are subject to change without notice. 2.1 Performance Specifications Models: TX-FM — Single point, with local analog display. TX-FMD — Single point, with local digital display. -
Page 9: Physical Characteristics
PureAire Monitoring Systems, Inc. 2.5 Physical Characteristics Dimensions: 4.9 (W) x 6 (H) x 2.54 (D) inches; 125 x 177 x 75 mm Weight: 1.1 pounds (0.5 kg) Enclosure Type: General purpose IP 65 NEMA 4X; not intended for explosive atmospheres. -
Page 10: 3: Installation
PureAire Monitoring Systems, Inc. 3: Installation 3.1 Site Requirements The TX-FM/FN/FK Sensor Head should be mounted in an area free of vibration and electrical noise or interference. If possible, avoid areas with high temperatures or relative humidity. The unit should be installed in a location where gas leaks are likely to occur or where released gases may accumulate. - Page 11 PureAire Monitoring Systems, Inc. NOTE: The terminal block may be removed from the printed circuit board to make these connections. Be sure to replace the terminal block securely once all connections have been made. Sensor Cable Type Wire Color...
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Page 12: Wiring
PureAire Monitoring Systems, Inc. 3.4 Wiring The TX-FM/FN and TX-1100FK uses a three conductor, 18 AWG stranded shielded cable. PureAire recommends the use of a General Cable #E2203S.30.86 or equivalent for analog output and 24 VDC power input. The maximum permissible cable length is 0.62 miles (1 km). -
Page 13: Initial Startup
PureAire Monitoring Systems, Inc. 3.4.2 Hazardous Areas If the TX-FM/FN transmitter is installed in a Class I, Division 1, Group B, C, or D hazardous area, the optional safety barrier must be installed between the transmitter and control panel. CAUTION: The TX-1100FK O system cannot operate in Class 1 environments. -
Page 14: 4: Normal Operation
PureAire Monitoring Systems, Inc. 4: Normal Operation The Model TX-FM/FN Sensor Head is a single point monitor designed for the continuous detection and measurement of hazardous gas leaks. 4.1 Concentration Display and Indicator Lights NOTE: The following applies to Model TX-FM and Model TX-FMD instruments only. -
Page 15: Loss Of Power Indicator
PureAire Monitoring Systems, Inc. 4.2.1 Routine Visual Checks TX-FM TX-FN DISPLAY UNIT NO DISPLAY Items to check Check for power and Check for power and proper operation proper operation Condition / status Should read “0” Unit should be when operating... -
Page 16: 5: Maintenance & Calibration
PureAire Monitoring Systems, Inc. 5: Maintenance & Calibration Maintenance and calibration should be performed only by qualified personnel. 5.1 Sensor Cell Removal and Installation 5.1.1 Sensor Removal 1. Remove the cover from the transmitter housing. 2. Unplug the sensor connection terminal block from the printed circuit board. - Page 17 PureAire Monitoring Systems, Inc. 5.1.2 Sensor Installation NOTE: If sensor is supplied with a shorting wire, it must be removed before installation. IMPORTANT: Be careful not to turn the sensor or touch the membrane on the bottom of the sensor during installation.
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Page 18: Electrolyte Replacement
PureAire Monitoring Systems, Inc. 5.2 Electrolyte Replacement (for renewable type sensor cells only) CAUTION: PureAire recommends wearing protective gloves and safety glasses when replacing sensor electrolyte. Be sure to adhere to your facility’s chemical handling guidelines and procedures. 1. Remove the sensor as outlined in section 5.1.1. - Page 19 PureAire Monitoring Systems, Inc. 4. Hold the sensor in your hand with the sensing electrode up. Hold a piece of paper tissue over the pressure compensation port with your thumb. Pour 10 cc’s of fresh electrolyte into the sensor and rinse. Discard into the beaker.
- Page 20 PureAire Monitoring Systems, Inc. 6. 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 7. Apply a drop of electrolyte on the sensing electrode. Drop of...
- Page 21 PureAire Monitoring Systems, Inc. 9. Place the retainer ring over the membrane and then place the box nut over the retainer ring. Turn box nut clockwise until it is hand tight; continue tightening until the box nut can no longer be moved by hand.
- Page 22 PureAire Monitoring Systems, Inc. 11. Wipe the pressure compensation port and its surrounding area with a dry paper tissue. Pressure Compensation Port Paper Tissue 12. Insert the pressure compensation screw into the port and cover with a new milli seal.
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Page 23: Sensor Calibration
PureAire Monitoring Systems, Inc. 5.3 Sensor Calibration The TX-FM/FN requires periodic calibration with the appropriate standard gas. Calibration should be performed whenever: • The membrane or electrolyte is replaced; • The entire sensor is replaced; • Six months has passed without membrane, electrolyte, or sensor replacement. - Page 24 PureAire Monitoring Systems, Inc. 5.3.2 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” Type Sensor Cells 690400 Calibration Cap for “K”...
- Page 25 PureAire Monitoring Systems, Inc. 4. Adjust the pump’s flowrate potentiometer until a flowrate of 0.5 liters/minute is achieved. A clockwise rotation increases flow; a counter-clockwise rotation decreases flow. 5. Recheck the instrument’s zero reading; adjust as required. 6. Generate the calibration gas within a Tedlar bag.
- Page 26 PureAire Monitoring Systems, Inc. 5.3.6 TX-1100FK Calibration TX-1100FK O system is always indicating ambient oxygen levels of 20.9% and does not require calibration. There are no zero or span pots supplied for adjustment. If required the O system operation may be checked by challenging it with nitrogen.
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Page 27: 6: Diagrams And Schematics
PureAire Monitoring Systems, Inc. 6: Diagrams and Schematics NOTE: Transmitters shown with standard power cable connector. Power cable connection also available as ¾ inch NPT fitting. 6.1 TX-FMD Dimensional Drawing Dimensional information given in millimeters (mm). -
Page 28: Tx-Fm Dimensional Schematic
PureAire Monitoring Systems, Inc. 6.2 TX-FM Dimensional Drawing Dimensional information given in millimeters (mm). -
Page 29: Tx-Fn Dimensional Schematic
PureAire Monitoring Systems, Inc. 6.3 TX-FN Dimensional Drawing Dimensional information given in millimeters (mm). -
Page 30: 7: Appendix
PureAire Monitoring Systems, Inc. 7: Appendix... - Page 31 PureAire Monitoring Systems, Inc.
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