Macurco™ TX-12-ND Nitrogen Dioxide Detector, Controller and Transducer User Instructions Important: Keep these User Instructions for reference
TABLE OF CONTENTS GENERAL SAFETY INFORMATION Intended Use List of Warnings and Cautions USE INSTRUCTIONS AND LIMITATIONS Use For Do Not Use For General Description Features Specifications INSTALLATION AND OPERATING INSTRUCTIONS Location Connections Installation 4-20 mA Output diagram Rear View Image Alarm Control Panel diagram Multiple Device diagram Alternate Alarm Panel diagram DVP-120 Control Panel diagram Power Up Operation Default – Factory Settings Display setting Buzzer setting Alarm Relay setting Al
GENERAL SAFETY INFORMATION Intended Use The Macurco TX-12-ND is a line voltage, dual relay Nitrogen Dioxide (NO2) detector, controller and transducer. The TX-12-ND utilizes an internal switching power supply that is capable of using line voltage between 100 and 240VAC and 50-60Hz. The TX-12-ND has selectable 4-20 mA output, buzzer and digital display options.
USE INSTRUCTIONS AND LIMITATIONS ! WARNING Each person using this equipment must read and understand the information in these User Instructions before use. Use of this equipment by untrained or unqualified persons, or use that is not in accordance with these User Instructions, may adversely affect product performance and result in sickness or death.
Features Specifications ETL Listed to UL 61010-1 and CAN/CSA C22.2 No 61010-1 Low level meter capable of displaying from 0-20 ppm Nitrogen Dioxide The TX-12-ND meets Uniform Building Code for enclosed garages and OSHA standards for gas exposure Selectable fan and alarm relay activation 5 A SPDT fan relay controls starters of exhaust fans 0.5 A N.O. or N.C.
! WARNING This detector helps monitor for the presence and concentration level of a certain specified airborne gas. Misuse may produce an inaccurate reading, which means that higher levels of the gas being monitored may be present and could result in overexposure and cause sickness or death. For proper use, see supervisor or User Instructions, or call Technical Service at 1-877-367-7891. Location A TX-12-ND is normally mounted at breathing level, about 5 feet (1.
Alarm Relay Connection The external alarm connections (A and B) are available at the Alarm modular connector. There is no polarity for these connections. To install the wiring for the alarm contacts disconnect the connector from the header on the detector. Strip the insulation of each wire back approximately 1/4 in. (6.5 mm), insert the bare wire into the terminal and tighten the screw clamp. Ensure that the wire cannot easily be pulled from the connector.
Typical connection to the Macurco DVP-120 Detection and Ventilation Control Panel Power Up The TX-12-ND steps through an internal self-test cycle for the first 1 minute that it is powered. The unit will execute the test cycle any time power is dropped and reapplied (i.e. power failure). During the self-test cycle the unit will display the Firmware Version number and the gas type, then count down from 60 to 0 (if the display option is “on”) and finally go into normal operation.
Default Configuration – Factory Settings The default Power Up Test setting is On The default Display setting is Off The default Buzzer setting is Off The default Alarm Relay Setting is activation at 5.0 ppm The default Alarm Relay Configuration is Normally Open The default Fan Relay Setting is activation at 2.
Selecting Power Up Test Option – “PUt” To select the Power Up Test Configuration, in normal mode, push the Next button to get to “Con” or the Configuration menu. Then push the Enter button to enter the Con menu. Then push the Next button to get to the second selection “PUt” or Power Up Test setting. Push Enter. If the test is “On” push Next to turn it “OFF” (flashing) then push Enter to confirm the change (solid) and push Enter again to return to “PUt” in the Con menu.
Enter. If the delay is “OFF” (disabled) push Next to change it to 1, 3, 5, or 10 minutes (flashing) then push Enter to confirm the change (solid) and push Enter again to return to “FrD” in the Con menu. Push Next until “End” is displayed then push Enter to get back to normal operation. Selecting Fan Relay Run Time – “Frr” To select the Fan Minimum Runtime setting, in normal mode, push the Next button to get to “Con” or the Configuration menu. Then push the Enter button to enter the Con menu.
Error Codes t01 t02 t04 t10 t20 t40 t80 t100 t200 Sensor missing Temperature compensation failure EEPROM bad checksum Bad EEPROM Bad calibration Factory calibration failure Read ADC failure Under range Sensor warranty expired NOTE: For trouble codes over 080 the display will alternate between t_1 and t00 for t100 and between t_2 and t00 for t200. If the error mode repeats frequently, check for continuous power and proper voltage.
Sensor Replacement 1. Remove power to the unit 2. Remove the Philips screw on the front of the TX-12-ND. Pull the front cover of the unit off. 3. Remove the sensor by pulling it gently from the three pronged socket. 4. Remove the Shorting Spring from the new sensor and insert the new sensor into the socket. 5. Power up the unit. The TX-12-ND steps through an internal self-test cycle for the first 1 minute that it is powered.
Cleaning Cleaning of the external surfaces is best carried out using a damp cloth with a mild detergent or soap. Use a vacuum cleaner with soft brush to remove dust or contamination under the cover. Do not blow out the sensor with compressed air. TESTING ! WARNING Using a certified gas with a concentration other than the one listed for this detector when conducting a calibration or calibration verification test (bump test) will produce inaccurate readings.
8. e) The 4-20mA output will then ramp up from 4 to 16 mA over the next 130 seconds of the test, so if the circuit is wired in the normal manner, the control panel or building automation system should respond. f) At the end of the test cycle, the light will turn green and be on steady (Normal Operation), the Fan & Alarm relay will be in standby mode and the 4-20 mA output will return to 4 mA (in clean air). When testing is completed reassemble the unit or units.
FCK Information Several detectors can be calibrated with one FCK. The only limitation is the amount of gas in the cylinder and the flow of the regulator. The 34 liter cylinder for example with a 0.2LPM regulator has approximately 170 minutes of continuous calibration run time. Replacement cylinders are available. The gas cylinder should be replaced when the pressure gauge on the regulator shows 25-psi or less.
Note: If the Fan relay does not close within 2 minutes, there are four possibilities: a. Gas cylinder is empty, check the pressure gauge. Replace the gas cylinder if 25psi or less. b. Unit needs to be re-calibrated (go through recalibration and re-test). c. Detector is in need of servicing (return unit to factory for servicing). d. Detector has fan relay set to disable (OFF). Set fan relay to 3 ppm and repeat the test. e. Detector has fan relay delay set to 3 minutes.
7. a. Gas cylinder is empty, check the pressure gauge. Replace the gas cylinder if 25-psi or less. b. Unit needs to be re-calibrated (go through recalibration and re-test). c. Detector is in need of servicing (return unit to factory for servicing). d. Detector has 4-20 mA option set to “OFF”. Set 4-20mA option to “On” and repeat the test. Remove the gas from the sensor. Re-assemble the TX-12-ND (make sure the LED is aligned with the front case hole). 4-20 current loop test is complete.
9. 10. 11. 12. If the calibration fails, the display will flash back and forth between the gas concentration and FAL (fail). If this occurs, check the pressure gauge on the regulator. If the pressure is less than 25 psi the flow of gas may not be adequate to properly calibrate the unit. If there is proper pressure in the cylinder repeat steps 4 through 6.
MACURCO FIXED GAS DETECTION PRODUCTS LIMITED WARRANTY Macurco warrants the TX-12-ND gas detector will be free from defective materials and workmanship for a period of two (2) years from date of manufacture (indicated on the inside cover of the TX-12-ND), provided it is maintained and used in accordance with Macurco instructions and/or recommendations.
