AMC AMC-1228 Bedienungsanleitung

1228

Multidrop Version

INSTRUCTIONS

Installation and Operation of the

AMC-1228 Electrochemical Sensor Module

For Use With Multidrop AMC Monitors

IMPORTANT:

Please read these installation and operating instructions completely

and carefully before starting.

Filename: 3075405B Revised, Apr. 17 2007

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: [email protected] • Internet: www.armstrongmonitoring.com/gas/

AMC-1228 Multidrop

TABLE OF CONTENTS

Section Title Page

1WARRANTY..........................................................................................................................3

1.1 LIABILITY.......................................................................................................................3

1.2 MODIFICATIONS AND SUBSTITUTIONS.....................................................................3

1.3 PRODUCT RETURN......................................................................................................3

2PRODUCT INFORMATION...................................................................................................4

2.1 SENSOR MODULE........................................................................................................4

2.2 FACTORY CALIBRATION .............................................................................................4

3PRODUCT DESCRIPTION ...................................................................................................5

3.1 GENERAL DESCRIPTION.............................................................................................5

3.1.1 INTERNAL FEATURES ..........................................................................................5

4INSTALLATION ....................................................................................................................7

4.1 LOCATION AND MOUNTING........................................................................................7

4.2 CABLE SELECTION AND WIRING ...............................................................................7

4.2.1 MULTI-UNIT INTERCONNECTION........................................................................7

4.2.2 TERMINATION........................................................................................................7

5OPERATION 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

6MAINTENANCE ..................................................................................................................12

6.1 GENERAL ....................................................................................................................12

6.2 VERIFICATION OF OPERATION ................................................................................12

6.3 SENSOR REPLACEMENT ..........................................................................................12

7ADDENDUM........................................................................................................................13

7.1 AMC MULTIDROP WITH HIGH ALARM LATCHING OPTION....................................13

7.1.1 OVERVIEW...........................................................................................................13

7.1.2 OPERATION.........................................................................................................13

7.1.3 LATCHING MODULE SPECIFICATIONS.............................................................13

AMC-1228 Multidrop

1WARRANTY

The AMC-1228 Module is warranted against defects in material and workmanship for a period of

two years from date of shipment (For sensor warranty see section 2.1). 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.

1.2 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.

1.3 PRODUCT RETURN

All products returned for warranty service will be by prepaid freight and they will only be

accepted with a repair number issued by AMC. All products returned to the client will be freight

collect.

WARNING

USING ELECTRICALLY OPERATED EQUIPMENT NEAR GASOLINE, OR GASOLINE

VAPOURS MAY RESULT IN FIRE OR EXPLOSION, CAUSING PERSONAL INJURY AND

PROPERTY DAMAGE. CHECK TO ASSURE THE WORKING AREA IS FREE FROM SUCH

HAZARDS DURING INSTALLATION OR WHEN PERFORMING MAINTENANCE, AND USE

PROPER PRECAUTIONS.

AMC-1228 Multidrop

2PRODUCT INFORMATION

2.1 SENSOR MODULE

Sensor Module Part Number ………………………….

Sensor Module Serial Number ………………………..

Sensor Element Part Number …………………………

Sensor Element Serial Number ……………………….

Sensor Warranty Period ………………………………. ______ years

Wire Gauge …………………………………………….. 18 AWG @150 ft max between units

Power Supply 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 qualified technicians should install and

maintain the equipment.

AMC-1228 Multidrop

3PRODUCT DESCRIPTION

In this section a general product description is given followed by a detailed list of the AMC-1228

unit's internal features.

3.1 GENERAL DESCRIPTION

The AMC-1228 sensor unit provides continuous, reliable surveillance of surrounding air for

traces of hazardous gases (listed in section 2.2 FACTORY CALIBRATION, page 4). This unit is

designed to allow interconnection in series as in a "daisy chain" configuration (refer to Figure 2)

to a single or multi-channel AMC 1AD Series monitor or so equipped inputs of other AMC

monitors. A maximum of eight (8) sensor modules can be connected to each zone. The units

can also be branched out from the central line allowing maximum flexibility. Each unit produces

Low alarm, High alarm and sensor Fail signals, which are transferred from one sensor to the

next up the line back to the monitor.

3.1.1 INTERNAL FEATURES

Each sensor module features alarm indicators, 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) HIGH ALARM ADJUSTMENT: Sets the high alarm trip point.

6) LOW ALARM ADJUSTMENT: Sets the low alarm trip point.

7) SIGNAL ADJUSTMENT: Sets the sensitivity of the sensor.

8) TERMINATING JUMPERS: Jumper clips are supplied installed on the circuit card.

When connecting additional sensor modules, the jumper clip

corresponding to the terminal block must be removed.

Refer to section 4.2.2 TERMINATION, for more details.

9) OUTPUT TERMINAL BLOCK: The output terminals (labeled –,s,+), connect to the (–,s,+)

terminals in the monitor, or to the input (–,s,+) terminals of

another sensor module.

10) INPUT TERMINAL BLOCKS: The input terminals (–,s,+), are used to connect additional

sensor modules. Each unused input terminal block must be

locked-out using a terminal jumper (see item 8).

AMC-1228 Multidrop

FIGURE 1: Internal Features of the AMC-1228 sensor module.

AMC-1228 Multidrop

4INSTALLATION

This section relates to the proper installation of the AMC-1228 unit. The topics of proper

location, sensor wiring selection, and multi-unit interconnection are all discussed in detail.

4.1 LOCATION AND MOUNTING

Mount the sensor unit on a solid, non-vibrating surface or structure, easily accessible for status

checking and calibration. The unit must be mounted in an area where the local concentration of

gas is unaffected by the presence of ventilation systems.

NOTE:

Mounting arrangement of the housing depends on the location and mounting surface.

Mounting hardware is NOT supplied.

4.2 CABLE SELECTION AND WIRING

To gain access to the terminal blocks, remove the four (4) screws and front panel from the

housing. This will expose the field wiring terminals. The sensor module output (-,s,+) terminal

block, connects to the input terminal block of the previous unit, or to the sensor/transmitter

terminal block in the monitor, as shown 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). For other distances or cable sizes, consult with

The Armstrong Monitoring Corporation.

4.2.1 MULTI-UNIT INTERCONNECTION

Each sensor module is designed to interconnect to other units in series and/or branching

configurations. Various typical configurations are shown in Figure 3, illustrating the versatility of

this type of system. Because each unit is pre-calibrated, additional units can be added to a

system without altering the monitor settings. When multiple units are interconnected, either one

or both jumpers need to be removed (refer to section 4.2.2 TERMINATION and Figure 2).

4.2.2 TERMINATION

For each unused input terminal block, the corresponding jumper MUST be left installed (as

shown in Figure 2). Failure to do so may cause the system to malfunction.

AMC-1228 Multidrop

FIGURE 2: Detail wiring of sensor modules.

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