210 Series Transmitter with External Electrochemical Sensor INSTRUCTIONS Installation and Operation of the AMC-210 Series Transmitter with External Electrochemical Sensor IMPORTANT: Please read these installation and operating instructions completely and carefully before starting. Filename: Manual_amc210_trx w external electrochemical sensor.doc Revised, Nov.2012 Copyright ©, Feb.
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AMC-210 Transmitter with external electrochemical sensor TABLE OF CONTENTS Section Title Page 1 WARRANTY............................................................................................................. 3 1.1 LIABILITY........................................................................................................... 3 1.2 PRODUCT RETURN ......................................................................................... 3 1.3 MODIFICATIONS AND SUBSTITUTIONS.......................
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AMC-210 Transmitter with external electrochemical sensor 1 WARRANTY The AMC-210 transmitter 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). Calibration is not warranted.
AMC-210 Transmitter with external electrochemical sensor 2 PRODUCT INFORMATION The AMC-210 series sensor/transmitter is designed to provide continuous, reliable surveillance of surrounding air for traces of a specific hazardous gas(es) (listed in section 2.2). This unit provides a 4 to 20 mA, variable current signal, which is proportional to the gas concentration detected. Each sensor/transmitter unit is factory calibrated and is ready for field installation and operation. 2.
AMC-210 Transmitter with external electrochemical sensor 2.2 FACTORY CALIBRATION Gas Type……………………………………………….…..…. Zero Gas, at 4 mA Signal…………….………………..……. Gas Concentration at 20 mA Signal……………………….. Calibration Adapter Part Number…………………………… Note: All Armstrong Monitoring systems must be installed and maintained according to instructions to assure proper operation. Only qualified technicians should install and maintain the equipment.
AMC-210 Transmitter with external electrochemical sensor 2.3 HOUSING OPTIONS The AMC-210 series sensor/transmitter units are available in the housings shown in Figure 1. The explosion proof transmitter housing is rated explosion proof for Class 1, Groups B, C and D locations and can have a corrosion resistant finish (optional). The sensors are also available as standard or explosion proof. PVC HOUSING: Rectangular PVC with cover plate held by four screws.
AMC-210 Transmitter with external electrochemical sensor 3 INSTALLATION 3.1 LOCATION AND MOUNTING Mount the sensor/transmitter on a solid, non-vibrating surface or structure in an area where the local concentration of gas is unaffected by the presence of ventilation systems and away from sources of interference gases. (See Figure 2) Note: Mounting arrangement of the housing depends on location and mounting surface. Mounting hardware is not supplied.
AMC-210 Transmitter with external electrochemical sensor 3.2 CABLE SELECTION AND WIRING Connection should be made using 2-conductor, shielded cable. For best signal transmission and maximum noise rejection, run cable through steel conduit (cable must be grounded at the monitor or power supply). Supply voltage can be measured at the transmitter (–, +) connections at the supply source.
AMC-210 Transmitter with external electrochemical sensor FIGURE 3: Cable selection graph 9
AMC-210 Transmitter with external electrochemical sensor 3.2.1 TRANSMITTER TO MONITOR WIRING The transmitter output (–, +) terminals connect to the (SIG, +) terminals on a channel terminal block of the monitor (one transmitter per channel), as shown in Figure 4. Each transmitter MUST BE CONNECTED TO ITS CORRESPONDING CHANNEL to retain factory calibration of the trip points. FIGURE 4: Transmitter to monitor wiring layout.
AMC-210 Transmitter with external electrochemical sensor 3.2.2 INTERFACING TO COMPUTER, DATALOGGER, OR NON-AMC MONITOR All Armstrong sensor/transmitters can be connected to computers or data loggers through analog-to-digital converters or to non-AMC monitors. The transmitter output (–, +) terminals connect to a filtered 12 to 30 VDC power supply through field wiring, as shown in Figure 5. The signal output from the transmitter is a 4 to 20 mA DC current.
AMC-210 Transmitter with external electrochemical sensor 4 OPERATION AND CALIBRATION 4.1 OPERATION The AMC-210 series sensor/transmitter is factory calibrated for the gas listed in section 2.2 at the beginning of this manual. The sensor/transmitter should not need re-calibration when first installed and powered up, but a test for correct operation is recommended after a stabilization period of 10 minutes.
AMC-210 Transmitter with external electrochemical sensor 5. Extended warranty calibration program For all above options, please contact AMC for details. 4.2.1 EQUIPMENT REQUIRED Digital multimeter with a minimum display range of 20.0 mA. Remote calibration lead provided with the transmitter, available from AMC. Miniature screwdriver trimmer adjustment tool. Calibration adapter, available from AMC. Zero & Span gases and regulator (Contact AMC for information). 4.2.
AMC-210 Transmitter with external electrochemical sensor RECALIBRATION For full recalibration adjustments, follow the Set-Up procedure steps 1 to 9 inclusive. There are two adjustments to be made for periodic recalibration: Zero and Span. Zero: While there is no gas present (clean air), the transmitter output signal current should read 4 mA. This is obtained by adjusting the Zero trimmer on the transmitter. It is possible, under certain conditions, that the Zero current will fall below 4 mA.
AMC-210 Transmitter with external electrochemical sensor 5 PREVENTIVE MAINTENANCE 5.1 GENERAL The sensor/transmitter unit should be brushed or wiped clean of any dust or dirt at least once a year or more, depending on the rate of accumulation. To avoid sensor damage, the unit MUST NOT be submerged in any liquids. Any hosing or splashing of the unit with any liquids must also be avoided. 5.2 SCHEDULED CALIBRATION Scheduled calibration is critical in maintaining proper function of gas sensor/transmitters.
AMC-210 Transmitter with external electrochemical sensor FIGURE 7: Sensor replacement and wiring procedure.
AMC-210 Transmitter with external electrochemical sensor 6 ADDENDUM (FOR OXYGEN ONLY) This AMC-210 Series (2-wire sensor/transmitter with external electrochemical sensor) has been modified and the following information replaces the terminal block & sensor wiring of Figures 4, 5, 6, and 7. The sensor/transmitter shows that the three wires changed to two wires for OXYGEN SENSOR ONLY. Terminal block & sensor wiring configuration are as shown below: Figure 8: Transmitter wiring layout for oxygen only.
