AMC AMC-1228 Instructions Manual Download Page 4 | Manualshive

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AMC AMC-1228 Instructions Manual Download Page 4

AMC-1228 Multidrop

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Summary of Contents for AMC-1228

Page 1: ...stallation and operating instructions completely and carefully before starting Filename 3075405B Revised Apr 17 2007 Copyright September 1996 The Armstrong Monitoring Corporation 215 Colonnade Road South Ottawa Ontario Canada K2E 7K3 Tel 613 225 9531 Fax 613 225 6965 U S CANADA Toll Free 800 465 5777 E mail gas armstrongmonitoring com Internet www armstrongmonitoring com gas ...

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Page 3: ...OCATION AND MOUNTING 7 4 2 CABLE SELECTION AND WIRING 7 4 2 1 MULTI UNIT INTERCONNECTION 7 4 2 2 TERMINATION 7 5 OPERATION AND CALIBRATION 10 5 1 OPERATION 10 5 1 1 ALARM CONDITIONS 10 5 1 2 FAULT SUPERVISION 10 5 2 CALIBRATION 10 5 2 1 Span Adjustment 10 5 2 2 Alarm Adjustment 11 6 MAINTENANCE 12 6 1 GENERAL 12 6 2 VERIFICATION OF OPERATION 12 6 3 SENSOR REPLACEMENT 12 7 ADDENDUM 13 7 1 AMC MULTI...

Page 4: ...AMC 1228 Multidrop 2 ...

Page 5: ...he installation and operation of this equipment AMC shall have no liability for labour or freight costs or any other costs or charges in excess of the amount of the invoice for the products THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES EXPRESSED OR IMPLIED AND SPECIFICALLY THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE THERE ARE NO WARRANTIES THAT EXTEND BEYOND THE DESCR...

Page 6: ...ly Requirement 6 to 18 VDC Operating Temperature 0 to 40 C Operating Pressure Ambient atmospheric pressure Relative Humidity 0 to 99 RH non condensing Sensor Warranty 2 2 FACTORY CALIBRATION Gas Type Low Alarm Setting High Alarm Setting Calibration Adapter Part Number Note All Armstrong Monitoring systems must be installed and maintained according to instructions to ensure proper operation Only qu...

Page 7: ...adjustment trimmers and connection terminal blocks as listed and described below 1 SENSOR Electrochemical cell factory calibrated 2 HIGH ALARM INDICATOR High conditions of gas are indicated by a red LED 3 LOW ALARM INDICATOR Low conditions of gas are indicated by a yellow LED 4 POWER FAIL INDICATOR Power is indicated by an illuminated green LED A sensor failure causes the green LED to turn OFF 5 H...

Page 8: ...AMC 1228 Multidrop 6 FIGURE 1 Internal Features of the AMC 1228 sensor module ...

Page 9: ...n in Figure 2 NOTE Turn off the power supply before removing or replacing the sensor Connection should be made using 3 conductor shielded cable shield must be grounded at the monitor Run cable through steel conduit for best signal transmission and maximum noise rejection A maximum length of 150 feet of 18 AWG size cable is allowed between each unit as well as between the monitor and first unit s F...

Page 10: ...AMC 1228 Multidrop 8 FIGURE 2 Detail wiring of sensor modules ...

Page 11: ...AMC 1228 Multidrop 9 FIGURE 3 Typical system configuration layouts ...

Page 12: ... is equipped with fault detection circuitry This condition is indicated by turning OFF the green Power LED viewed through the front panel The condition will exist until the fault is corrected 5 2 CALIBRATION The AMC 1228 sensor module is factory calibrated at levels based on set standards Calibration of the unit should last for the life of the sensor with few periodic adjustments unless the alarm ...

Page 13: ...g Alarm Voltage to the appropriate fraction of full scale gas concentration Alarm Voltage can be measured from TB3 to Low test point and high test point see Figure 4 for location I E Full Scale 10ppm 3VDC Full Scale X alarm Trip Point Alarm Trip Point 1ppm 3VDC 10ppm X 1ppm 3VDC FIGURE 4 Span and alarm adjustment CAUTION Only qualified personnel should perform the actual calibration Users are advi...

Page 14: ...t once every 6 months for safety reasons and for highly demanding applications monthly verification is recommended 6 3 SENSOR REPLACEMENT The sensor should be replaced when the green LED turns OFF while the unit is powered or when the sensor no longer adequately responds to test gas CAUTION Turn off the power supply before attempting the following When the sensor needs replacing reorder the Part N...

Page 15: ...t time delay and reset switch on the front panel The latching module itself is located inside the Multidrop under the main circuit board 7 1 2 OPERATION The unit will operate as per a standard Multidrop with the additional feature When there is a high alarm the latching high alarm red LED will turn ON and stay on To turn this LED OFF the reset button has to be pushed NOTE When first powered up the...

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