Fan Relay Delay setting Fan Minimum Runtime setting Fan Relay Latching setting 4-20mA Output setting On Board Diagnostics Sensor Poisons MAINTENANCE End-of-Warranty Signal Sensor Replacement Sensor Life Reset Cleaning Testing Operation Test Ammonia Test Field Calibration Procedure MACURCO GAS DETECTION PRODUCTS WARRANTY...
NH3 concentrations in industrial refrigeration, warehouses, hockey rinks or other commercial applications. The TX-6-AM is a low level meter capable of displaying from 0-100 ppm of Ammonia. The TX-6- AM is factory calibrated and 100% tested for proper operation, but can also be calibrated in the field.
The TX-6-AM is not intended for use in hazardous locations. Do not mount the TX-6-AM where the normal ambient temperature is below 0°F or exceeds 125°F (below -18C or above 52C). The TX-6-AM mounts on a 4x4 electrical box supplied by the contractor. Do not install the TX-6-AM inside another box unless it has good air flow through it.
INSTALLATION AND OPERATING INSTRUCTIONS The following instructions are intended to serve as a guideline for the use of the Macurco TX-6-AM Ammonia Detector. It is not to be considered all-inclusive, nor is it intended to replace the policy and procedures for each facility. If you have any doubts about the...
Location A TX-6-AM is normally mounted high in the room on a wall or column one foot below the ceiling in a central area where air movement is generally good. Use the same spacing as for smoke detectors, 30-foot centers, 900 square feet per detector (465 sq. meters). The coverage depends on air movement within the room or facility.
The Fan Relay can be configured for latching or non-latching (default) when activated (when the gas concentration exceeds fan relay set point). The Fan Relay will engage if the fan setting Ammonia concentration is exceeded for longer than the Fan Relay Delay time. Unless it is configured for latching, the fan relay will disengage once both of these conditions have been met: ...
Power Up The TX-6-AM 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, then count down from 60 to 0 and finally go into normal operation.
The default 4-20mA Output setting is On To change settings, remove the Philips screw on the front of the TX-6-AM. Pull off the front cover of the unit. Selecting Default Configuration – “dEF” To select the Default 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.
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.
Onboard Diagnostics The TX-6-AM monitors all critical functions of the unit through software diagnostics that continuously test and verify unit operations. If a problem is found, the unit will switch to a fail-safe/error mode or trouble condition. In this error mode, the Fan and Alarm relays will be activated, the 4-20 mA current loop will go to 24 mA, the unit will display the error code and the buzzer will chirp intermittently.
MAINTENANCE The TX-6-AM requires periodic maintenance. The unit uses an electrochemical sensor with a 2-3 year life expectancy that can be tested, calibrated and replaced in the field. The TX-6-AM replacement sensor is available through your local representative or from Macurco.
4. Remove the Shorting Spring from the new sensor if installed and insert the new sensor into the socket. 5. Power up the unit. The TX-6-AM steps through an internal self-test cycle for the first 1 minute that it is powered. During the self-test cycle the unit will display the Firmware Version number, then count down from 60 to 0 and finally go into normal operation.
Operation Test Normally this will be the only test required for the TX-6-AM and is the recommended way to test the unit or units after installation. Check that the green TX-6-AM operating LED light is illuminated continuously. If not, do not proceed with the tests. If the unit is in error mode contact your local representative or Macurco technical service representative for information on resolving the problem.
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Push the Test switch once. The TX-6-AM will step through a cycle test: The display progresses through the BUZ (buzzer test), Art (alarm relay test), Frt (fan relay test) then 42t (4-20 mA output test). During the first 3 seconds of the test cycle, the Buzzer will sound During the next 5 seconds of the test cycle, the Alarm relay will be closed, so any devices connected to that relay will be tested.
Ensure sensor inlets are unobstructed and is free of debris General The TX-6-AM can be bump-tested or calibrated with the AM-FCK with Ammonia gas, regulator and test hood, available through your local representative or from Macurco. Contents of the FCK ...
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Turn on the regulator to start the gas flow and wait with the gas applied continuously. With the display function turned “On”, the TX-6-AM will show the current concentration of gas or “0” (zero) in clean air. When the gas concentration reaches the Fan Relay setting (20 ppm, for example) the display will flash back and forth between “FAn”...
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-6-AM (make sure the LED is aligned with the front case hole). 4-20 current loop test is complete.
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To return to Normal Mode press Enter and then press Next until “End” is displayed. Press Enter to return to Normal Mode. Calibration Remove the Philips screw on the front of the TX-6-AM. Pull the front cover of the unit off. Assemble the 25 ppm gas cylinder and regulator together.
MACURCO FIXED GAS DETECTION PRODUCTS LIMITED WARRANTY Macurco warrants the TX-6-AM 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-6-AM), provided it is maintained and used in accordance with Macurco instructions and/or recommendations.
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