User Manual

5
Features
 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. alarm relay connects to warning devices or control panels
 4-20 mA Current Loop
 TX-12-ND mounts on a standard 4x4 electrical box and becomes cover for the box
 Supervised system: any internal detector problem will cause the fan & alarm relay to activate
 Calibration kit is available. One screw allows access for calibration or gas test
Specifications
 Power: 100-240VAC (50 TO 60 HZ)
 Current: 1.0 A MAX
 Shipping Weight: 1 pound (0.45 kg)
 Size: 4 1/2 x 4 x 2 3/4 in. (11.4 X 11.4 X 7.0 cm)
 Color: Dark gray
 Connections: plugs/terminals
 Mounting box: (not included) 4x4 electric
 Fan relay: 5 A, 240 VAC, pilot duty, SPDT
 Fan relay actuation: selectable at OFF, 0.5, 0.7, 1.0, 1.2, 1.5, 1.7, 2.0, 2.2, 2.5 (default), 2.7, 3.0, 3.2, 3.5, 3.7, 4.0, 4.2,
4.5, 4.7, 5.0 ppm
 Fan Delay Settings of 0, 1, 3 (default), 5 and 10 minutes
 Fan Minimum Run Time settings are OFF (default), 3, 5, 10 or 15 minutes
 Fan relay latching or not latching (default) selectable
 Alarm relay: 0.5A 120 V, 60 VA
 Alarm relay actuation: selectable N.O. (default) or N.C.
 Alarm relay settings: OFF, 1, 2, 3, 4, 5 (default), 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 ppm
 Current Loop: 4-20 mA for 0-20ppm NO
2, selectable to off (default) or on
 Buzzer: 85 dBA at 10cm settable to off (default) or on
 Digital display: 3 digit LED selectable to off (default) or on.
 Operating Environment: 0°F to 125°F (-18C to 52C).10 to 90% RH
 Operating altitude: Up to 5,000m (16,404ft)
INSTALLATION AND OPERATING INSTRUCTIONS
The following instructions are intended to serve as a guideline for the use of the Macurco TX-12-ND Nitrogen Dioxide 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
applicability of the equipment to your situation, consult an industrial hygienist or call Technical Service at 1-877-367-7891.