AMC 350 Manuale utente
350
Sensor/Transmitter
INSTRUCTIONS
Installation, Calibration & Maintenance
of the AMC-350 Sensor/Transmitter
IMPORTANT:
Please read these installations and operating instructions completely
and carefully before starting.
Filename; Manual_amc-350_transmitter.doc Revised, 7/21/2004
Copyright ©, April 1989, AMC
The Armstrong Monitoring Corporation
215 Colonnade Road South, Nepean, Ontario, Canada K2E 7K3
Tel: (613) 225-9531 • Fax: (613) 225-6965 • Canada & U.S. Toll Free: 1-800-465-5777
AMC-350 Sensor/Transmitter
1
TABLE OF CONTENTS
Section Title Page
1WARRANTY.............................................................................................................3
1.1 LIABILITY...........................................................................................................3
1.2 PRODUCT RETURN .........................................................................................3
1.3 MODIFICATIONS AND SUBSTITUTIONS.........................................................3
2PRODUCT INFORMATION......................................................................................4
2.1 SENSOR/TRANSMITTER..................................................................................4
2.2 FACTORY SETTINGS.......................................................................................4
3PRODUCT DESCRIPTION ......................................................................................5
3.1 GENERAL DESCRIPTION.................................................................................5
3.1.1 SENSOR / TRANSMITTER SPECIFICATIONS......................................................5
3.2 HOUSING OPTIONS.........................................................................................6
4INSTALLATION .......................................................................................................7
4.1 LOCATION AND MOUNTING............................................................................7
4.2 CABLE SELECTION AND WIRING...................................................................8
4.3 COMPUTER, DATALOGGER OR NON-AMC INTERFACE..............................9
5OPERATION AND CALIBRATION........................................................................11
5.1 OPERATION....................................................................................................11
5.2 CALIBRATION.................................................................................................11
5.2.1 EQUIPMENT REQUIRED.....................................................................................11
5.2.2 TRANSMITTER CALIBRATION/VERIFICATION PROCEDURE..........................12
5.2.3 RECALIBRATION .................................................................................................12
6PREVENTIVE MAINTENANCE..............................................................................14
6.1 GENERAL........................................................................................................14
6.2 VERIFICATION OF OPERATION....................................................................14
6.3 SENSOR REPLACEMENT..............................................................................14
AMC-350 Sensor/Transmitter
2
NOTE
This page intentionally left blank.
AMC-350 Sensor/Transmitter
3
1WARRANTY
The AMC-350 Series Transmitter is warranted against defects in material and workmanship for
a period of two (2) years from date of delivery. During the warranty period, The Armstrong
Monitoring Corporation will repair or replace components that prove to be defective in the
opinion of AMC. We are not liable for auxiliary interfaced equipment, or consequential damage.
This warranty shall not apply to any product, which has been modified in any way, which has
been repaired by any other party other than a qualified technician or authorized AMC
representative, or when such failure is due to misuse or conditions of use.
1.1 LIABILITY
All AMC products must be installed and maintained according to instructions. Only qualified
technicians should install and maintain the equipment. AMC shall have no liability arising from
auxiliary interfaced equipment, for consequential damage, or the 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
DESCRIPTION ON THE FACE THEREOF.
WARNING
CHECK TO ASSURE THE WORKING AREA IS FREE FROM HAZARDS DURING
INSTALLATION OR WHEN PERFORMING MAINTENANCE, AND USE PROPER
PRECAUTIONS.
1.2 PRODUCT RETURN
All products returned for warranty or service should be shipped by prepaid freight and will be
accepted only with a repair number issued by AMC. All products returned to the client will be
shipped by freight collect.
1.3 MODIFICATIONS AND SUBSTITUTIONS
Due to an ongoing development program, AMC reserves the right to substitute components and
change specifications at any time without incurring any obligations.
AMC-350 Sensor/Transmitter
4
2PRODUCT INFORMATION
2.1 SENSOR/TRANSMITTER
Sensor/Transmitter Unit Order Number..………………………..
Transmitter Part Number…………..……………..……………….
Transmitter Serial Number………...………………………….……
Sensor Part Number…………………………………………….…..
Sensor Serial Number ………….…………………………………..
Power Supply Requirement ………………………………………. 12 to 26 VDC @ 250 mA
Signal Output Load ……………………………………………….. maximum 250 ohms
Sensor Warranty ………………………………………………..
_______________________
2.2 FACTORY SETTINGS
Gas Type. ……………………………………………………………
Range. ……………………………………………………………….
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-350 Sensor/Transmitter
5
3PRODUCT DESCRIPTION
3.1 GENERAL DESCRIPTION
The AMC-350 series sensor/transmitter unit is designed to provide continuous, reliable
surveillance of surrounding air for traces of hazardous gases (listed in Factory Calibration,
section 2.2). It 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 ready for field
installation and operation.
3.1.1 SENSOR / TRANSMITTER SPECIFICATIONS
SENSOR TYPE:
Solid state.
RESPONSE TIME:
90% full scale in less than 30 seconds.
ZERO DRIFT:
Less than 5% per year.
SIGNAL OUTPUT LOAD:
250 Ohms maximum.
OPERATING TEMPERATURE:
-40 to +40 ºC (-40 to +104 ºF)
HUMIDITY:
0 to 99% RH, non-condensing.
OPERATING PRESSURE:
Ambient atmospheric pressure.
EXPECTED SENSOR LIFE
10 years (continuous operation).
ACCURACY/REPEATABILITY
Within 5% of full scale.
Note:
Turn off power supply before removing or replacing the transmitter or sensor.
AMC-350 Sensor/Transmitter
6
3.2 HOUSING OPTIONS
The AMC-350 series sensor/transmitter units are available in the following housings (see
FIGURE 1). The explosion-proof housings are also available with a corrosion resistant finish.
•Explosion-Proof (rated for Class I, Groups B, C, D)
•Explosion-Proof (rated for Class I, Groups A, B, C, D)
FIGURE 1: Explosion-proof housing options.
AMC-350 Sensor/Transmitter
7
4INSTALLATION
4.1 LOCATION AND MOUNTING
Mount the sensor/transmitter unit 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. The
sensor/transmitter housing SHOULD NOT touch the mounting surface. In some cases this may
require the use of a spacer between the mounting surface and the sensor/transmitter housing.
(See FIGURE 2).
Note:
Mounting arrangement of the transmitter housing depends on location of transmitter
and mounting surface. Mounting hardware is not supplied.
FIGURE 2: Mounting of the sensor/ transmitter.
AMC-350 Sensor/Transmitter
8
4.2 CABLE SELECTION AND WIRING
The transmitter output (–, S, +) terminal block connects to the (–, S, +) connections on a
channel terminal block of the monitor (one transmitter per channel), as shown in FIGURE 4.
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 allowable
distances. The maximum permissible distance between the transmitter and monitor is
dependant on wire gauge as shown in the following Cable Selection Chart (FIGURE 3)
FIGURE 3: Cable Selection Chart.
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