AMC 1ACO Instructions Manual
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AMC 1ACO Instructions Manual

One-channel gas monitor
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Installation and Operation of the
Gas Monitor 1ACO One-Channel Monitor
IMPORTANT:
Please read these installation and operating instructions completely
and carefully before starting.
Filename: 3221405A.doc
215 Colonnade Road South, Ottawa, Ontario, Canada K2E 7K3
Tel: (613) 225-9531 • Fax: (613) 225-6965 • Canada & U.S. Toll Free: 1-800-465-5777
E-mail: gas@armstrongmonitoring.com • Internet: www.armstrongmonitoring.com
Gas Monitor
1ACO
One-Channel Gas Monitor
INSTRUCTIONS
The Armstrong Monitoring Corporation
Copyright © July 2009, AMC

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  • Page 1 Gas Monitor 1ACO One-Channel Gas Monitor INSTRUCTIONS Installation and Operation of the Gas Monitor 1ACO One-Channel Monitor IMPORTANT: Please read these installation and operating instructions completely and carefully before starting. Filename: 3221405A.doc Copyright © July 2009, AMC The Armstrong Monitoring Corporation 215 Colonnade Road South, Ottawa, Ontario, Canada K2E 7K3 Tel: (613) 225-9531 •...

  • Page 3: Table Of Contents

    Gas Monitor 1ACO One-Channel Monitor TABLE OF CONTENTS Section Title Page WARRANTY..........................3 LIABILITY ........................3 PRODUCT RETURN ......................3 MODIFICATIONS AND SUBSTITUTIONS..............3 PRODUCT INFORMATION....................4 PRODUCT DESCRIPTION ....................5 GENERAL DESCRIPTION .....................5 3.1.1 MONITOR FEATURES ...................5 INSTALLATION ........................8 MOUNTING INSTRUCTIONS ..................8 WIRING ..........................9 4.2.1 MONITOR WIRING ....................9...
  • Page 4 Gas Monitor 1ACO One-Channel Monitor...

  • Page 5: Warranty

    Gas Monitor 1ACO One-Channel Monitor 1 WARRANTY The AMC-1ACO one-channel monitor is warranted against defects in material and workmanship for a period of two (2) years from date of shipment (except electrochemical sensor elements, catalytic elements and portable monitors – one (1) year – refer to individual spec sheets for additional exceptions).

  • Page 6: Product Information

    Gas Monitor 1ACO One-Channel Monitor 2 PRODUCT INFORMATION Monitor Serial Number. ………………..……………….. AMC-S2e Serial Number………………………………… Alarm Trip Points…………………………………………. Warning _______________________ Alarm________ _________________ Full Scale Concentration………………………………… Power Supply Requirement. ………………….……..… 120 VAC, 60 Hz, 30 VA Operating Temperature.…….………………….……..… -20°C to +40°C (-4°F to +104°F) Operating Pressure..…………….…………….……..…..

  • Page 7: Product Description

    3 PRODUCT DESCRIPTION 3.1 GENERAL DESCRIPTION The Gas Monitor 1ACO monitor is a one channel gas monitoring system incorporating state of the art sensing technology using micro-controller based design to provide continuous, reliable surveillance of surrounding air for traces of hazardous gases (listed in Section 2). The monitor comes with the following features, see Figures 1 and 2.
  • Page 8 Allows user to configure the alarm delay and timer SWITCHES: circuits, audio alarm activation, sensor mode selection, fault threshold, and acknowledge switch function 12. RELAYS: 2 alarm DPDT relays are provided 13. ON-BOARD AMC-S2e Sensor allows local detection of gas SENSOR: FIGURE 1: Gas Monitor 1ACO, Front Cover.
  • Page 9 DIP SWITCHES JUMPERS 13. ON-BOARD AMC-S2e SENSOR 9. TEST SWITCH 10. TRIP POINT ADJUSTMENT 7. AUDIO ALARM INDICATOR 5. TRANSFORMER (UNDER PCB) 6. INTERNAL WIRING HEADER 12. RELAYS 4. POWER TERMINAL BLOCK FIGURE 2: Internal Features of the Gas Monitor 1ACO.

  • Page 10: Installation

    Gas Monitor 1ACO. 4.1 MOUNTING INSTRUCTIONS Securely fasten the Gas Monitor 1ACO unit on a solid, non-vibrating surface or structure. Install the unit where it is not exposed to rain or water spray. Install in an area where the local concentration of gas is unaffected by the presence of ventilation systems and away from sources of interference gases.

  • Page 11: Wiring

    10Amps@250VAC resistive. For relay contact arrangement, see Figure 5. The Gas Monitor 1ACO is shipped factory configured to be de-energized in the non-alarm state. If the user prefers to have relays in a normally energized (failsafe) state see section 4.4 for jumper configuration.

  • Page 12: Amc-S2E Connection

    FIGURE 5: Relay Contact Arrangement. 4.2.2 AMC-S2e Connection The AMC-S2e sensor is designed to plug into the same socket as the solid state sensor. Plug the sensor into the socket and ensure the green LED on the AMC-S2e illuminates. If the green LED does not illuminate, unplug and rotate AMC-S2e 180º.

  • Page 13: Dip Switch Programming

    Gas Monitor 1ACO One-Channel Monitor MD-V 4-20mA JB10 SENSOR 1 JB10 V+ = SS = +5V = MD-V = 4-20mA = FIGURE 7: Signal input configuration jumpers. 4.3 DIP SWITCH PROGRAMMING The circuit board has two blocks of DlP-switches for configuring the various functions; see Figure 2, item 11.
  • Page 14 Gas Monitor 1ACO One-Channel Monitor Switch Feature Position Description Warning and alarm relays are maintained in alarm state SW1-2, Minimum Run for a minimum time interval following alarm activation, as Timer Description SW2-2 follows: SW1-2 SW2-2 Minimum Run Time 0 minutes...

  • Page 15: Alarm Relay Programming

    Gas Monitor 1ACO One-Channel Monitor 4.4 ALARM RELAY PROGRAMMING The WARNING and ALARM relays may be configured as normally energized or normally de- Table 2 WARNING and ALARM Relay Active energized with the jumper straps identified in State and shown in Figure 2, item 8 .

  • Page 16: Operation And Calibration

    5.4 ALARM/WARNING RELAY ACTIVATION DELAYS The Gas Monitor 1ACO comes standard with 5 min activation time delays for the WARNING and ALARM relay contacts. The activation time delays can help prevent short cycling WARNING/ALARM in some applications. The delays can be enabled by turning ON switches SW2-5 and SW2-6, for WARNING/ALARM respectively.

  • Page 17: Calibration/Service

    5.6 CALIBRATION/SERVICE The Gas Monitor 1ACO and AMC S2e (CO) comes factory calibrated and does not need to be adjusted as part of installation and should be ready for operation after installation and a 30 minute stabilization time.

  • Page 18: Equipment Required

    JB10 FIGURE 8: Gas Monitor 1ACO Test Points and Trimpots. The AMC-S2e supplies a linear 1.0 to 3.3V DC signal to the monitor. This translates to a 0.4 to 1.32 volt DC signal at TP4. The alarms are set to correspond to some fraction of the transmitters full scale calibration.
  • Page 19 Connect the negative lead of the multimeter to TP7 AGND 1) Obtain access to AMC-S2e (CO). Remove cover of 1ACO so gas can be applied directly to the sensor and signal pot can be adjusted. 2) Attach multi-meter to measure the output signal; positive lead to TP4 and negative...
  • Page 20 Gas Monitor 1ACO One-Channel Monitor • = (( 25 PPM / 100 PPM) * (1.320V – 0.380V)) + 0.380V alarm = 0.615V RV5 would be adjusted so that 0.615V is measured at TP5. DIGITAL MULTIMETER CONNECT BLACK MEASURE VOLTAGE ( - ) LEAD TO GND.

  • Page 21: Preventive Maintenance

    Push and hold the test button to verify the audio and WARNING and ALARM relays are operational. It is recommended that the AMC S2e (CO) be calibrated a minimum of twice a year, and 4 times a year is preferable.

  • Page 22: Installation Tips And Tricks

    Gas Monitor 1ACO One-Channel Monitor 7 INSTALLATION TIPS AND TRICKS CABLING • Cabling – use 2 conductor cable with 2 wire transmitter and 3 conductor cable with everything else. Generally, 18 gauge conductors are used (not true in all cases).

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