User Instructions

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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).
8. When testing is completed reassemble the unit or units.
Manual Operation Test
This option gives the user the opportunity to manually initiate an individual test for each relay, the analog output and the sensor
response to gas. From normal operation mode press the Next button 2 times to get to the Test Mode (tSt). Press the Enter button once
to get into the Test Menu. Press the Next button to scroll through the five test options and press Enter to initiate the selected test. Note
that if the relay or 4–20 mA output has been disabled, the test selection will not be displayed in the test menu.
BUZ – Buzzer Test, 3 seconds
Art - Alarm Relay Test, 5 seconds
Frt - Fan Relay Test, 60 seconds
42t - 420 loop test, 130 seconds
gtS - Gas Test, 3 minutes (no output to the panel during the gas test)
The display will flash during the test, or in the case of the gas test, the gas level will alternate with gtS. Once the test is complete, the
display will return to steady display. To exit the test menu, press the Next button until “End” is displayed, then press Enter to return to
normal mode.
Ammonia Gas Test
The following steps must be performed when conducting a calibration or calibration verification test (bump test) to ensure proper
performance of the monitor. Failure to do so may adversely affect product performance and result in sickness or death.
 When performing a calibration or calibration verification test (bump test) only use certified calibration gas at the
required concentration level. Do not calibrate with expired calibration gas.
 If the instrument cannot be calibrated, do not use until the reason can be determined and corrected.
 Do not cover or obstruct display or visual alarm cover.
 Ensure sensor inlets are unobstructed and is free of debris
General
The TX-12-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
 AM-FCK: (1) Gas Cylinder, 25 ppm Ammonia gas in air
 Gas regulator with about two feet of plastic tubing
 Gas test hood
! WARNING