Bacharach MGS 550 User manual

Fixed Gas Detector
User Manual
Installation ●Operation ● Configuration ● Troubleshooting
March 28, 2016
Version 1
Product Leadership •Training •Service •Reliability
www. .com [e-mail]1.800.561.8187

MGS-550 Fixed Gas Detector
2 P/N: 1100-1000 Version 1
WARRANTY POLICY
Bacharach, Inc. warrants this instrument, excluding sensors, to be free from defects in materials and workmanship for a period of
two years from the date of purchase by the original owner. The sensors have a pro-rated warranty period of 6 to 18 months,
depending on the sensor type. If the product should become defective within this warranty period, we will repair or replace it at our
discretion.
The warranty status may be affected if the instrument has not been used and maintained per the instructions in this manual or has
been abused, damaged, or modified in any way. This instrument is only to be used for purposes stated herein. The manufacturer is
not liable for auxiliary interfaced equipment or consequential damage.
Due to ongoing research, development, and product testing, the manufacturer reserves the right to change specifications without
notice. The information contained herein is based on data considered accurate. However, no warranty is expressed or implied
regarding the accuracy of this data.
All goods must be shipped to the manufacturer by prepaid freight. All returned goods must be pre-authorized by obtaining a return
merchandise authorization (RMA) number. Contact the manufacturer for a number and procedures required for product transport.
SERVICE POLICY
Bacharach, Inc. maintains an instrument service facility at the factory. Some Bacharach distributors/agents may also have repair
facilities; however, Bacharach assumes no liability for service performed by anyone other than Bacharach personnel. Repairs are
warranted for 90 days after date of shipment (sensors, pumps, filters and batteries have individual warranties). Should your
instrument require non-warranty repair, you may contact the distributor from whom it was purchased
NOTICES
This manual is subject to copyright protection; all rights are reserved under international and domestic copyright laws. This manual
may not be copied or translated, in whole or in part, in any manner or format, without the written permission of Bacharach, Inc.
All software utilized and/or distributed by Bacharach is subject to copyright protection. All rights are reserved. No party may use or
copy such software in any manner or format, except to the extent that Bacharach grants them a license to do so. If this software is
being loaded onto more than one computer, extra software licenses must be purchased.
© 2016 Bacharach, Inc.
www. .com [e-mail]1.800.561.8187

MGS-550 Fixed Gas Detector
P/N: 1100-1000 Version 1 3
TABLE OF CONTENTS
SECTION 1. SAFETY ............................................................................................................................5
1.1 Definition of Alert Icons..............................................................................................................5
1.2 General Safety Statements .......................................................................................................5
1.3 Safe Connection of Electrical Devices ......................................................................................5
SECTION 2. DESCRIPTION..................................................................................................................6
2.1 Product Overview ......................................................................................................................6
2.2 Key Product Features................................................................................................................7
2.3 General Purpose Option............................................................................................................8
2.4 Explosion Proof Option..............................................................................................................9
2.5 Sensor Styles...........................................................................................................................10
SECTION 3. INSTALLATION..............................................................................................................11
3.1 General Information for Installation .........................................................................................11
3.2 Installation Restrictions............................................................................................................11
3.3 Mechanical Installation ............................................................................................................12
3.4 Electrical Installation................................................................................................................12
3.4.1 Preparations ...............................................................................................................12
3.4.2 Power and Signal Wiring............................................................................................14
3.4.3 Relay Wiring ...............................................................................................................15
3.4.4 Installation of Remote Sensing Head.........................................................................16
3.4.5 Connecting One or More MGS-550s to a Bacharach Controller................................17
3.4.6 Modbus RTU Interface ...............................................................................................17
3.4.7 Conclusion..................................................................................................................17
SECTION 4. OPERATION...................................................................................................................18
4.1 Overview of Normal Operation................................................................................................18
4.1.1 Applying Power and the Start-up Sequence ..............................................................18
4.1.2 Verifying Analog Signals.............................................................................................19
4.1.3 Verifying the Digital Modbus Signal............................................................................19
4.1.4 The 5-Digit Display and LEDs ....................................................................................19
4.2 Menus......................................................................................................................................21
4.2.1 General Navigation.....................................................................................................21
4.2.2 Checking Status and Changing Parameter Values....................................................22
4.2.3 Exiting the Menu.........................................................................................................22
4.2.4 Menu Overview...........................................................................................................23
4.3 Functions.................................................................................................................................25
4.3.1 Offline Mode (F-01) ....................................................................................................25
4.3.2 Zero Adjustment (F-02) ..............................................................................................25
4.3.3 Span Adjustment (F-03) .............................................................................................25
4.3.4 Instrument Test (F-04)................................................................................................25
4.3.5 Parameter Menu (F-05)..............................................................................................26
4.3.6 Register Sensor (F-06)...............................................................................................26
4.3.7 De-register One Sensor (F-07)...................................................................................27
4.3.8 De-register All Sensors and Reset Node Address (F-08) ..........................................27
4.3.9 Diagnostics, System Information and Fault Data (F-09) ............................................28
4.3.10 Reset System to Factory Default Setting (F-10) ........................................................28
4.4 Parameters..............................................................................................................................29
4.4.1 Sensor 1 Settings (S1-xx) and Sensor 2 Settings (S2-xx) if Connected....................29
4.4.2 Relay Designation (RX-xx).........................................................................................32
4.4.3 Alarm Configuration (AF-xx).......................................................................................33
4.4.4 Analog Output Configuration (AX-xx).........................................................................34
4.4.5 Modbus Configuration (MB-xx)...................................................................................35
4.4.6 Display Mode (P1-01).................................................................................................35
4.4.7 Buzzer Designation (B1-xx)........................................................................................35
SECTION 5. MAINTENANCE..............................................................................................................36
5.1 Maintenance Intervals .............................................................................................................36
www. .com [e-mail]1.800.561.8187

MGS-550 Fixed Gas Detector
4 P/N: 1100-1000 Version 1
5.2 Making Adjustments to Sensors..............................................................................................36
5.2.1 Introduction.................................................................................................................36
5.2.2 General Procedure .....................................................................................................37
5.2.3 Zero Adjustment .........................................................................................................38
5.2.4 Span Adjustment........................................................................................................38
5.2.5 System Bump Test.....................................................................................................38
5.3 Troubleshooting.......................................................................................................................39
5.3.1 Hexadecimal Format ..................................................................................................39
5.3.2 Diagnostics Attributes.................................................................................................39
5.3.3 Instrument Electronics Critical (E100) Faults.............................................................40
5.3.4 Non-Critical (E300) Faults..........................................................................................41
5.3.5 Sensor Faults .............................................................................................................42
5.4 Sensor Maintenance (General Purpose Housings).................................................................44
5.4.1 Components Overview...............................................................................................44
5.4.2 Replacing the Sensor Module ....................................................................................45
5.4.3 Replacing the Sensor Control Board..........................................................................46
5.4.4 Replacing the Local Sensing Head Assembly............................................................47
5.4.5 Adding a Second Sensor............................................................................................48
5.4.6 Replacing the Remote Sensing Head Assembly .......................................................49
5.5 Sensor Maintenance (Explosion Proof Housings)...................................................................50
5.5.1 Components Overview...............................................................................................50
5.5.2 Replacing the Sensor Module ....................................................................................51
5.5.3 Replacing the Sensor Control Board..........................................................................52
5.5.4 Replacing the Local Sensing Head Assembly............................................................53
5.5.5 Replacing the Remote Sensing Head Assembly .......................................................54
5.6 Replacing the Instrument Electronics......................................................................................55
5.7 Replacing the Interface Board.................................................................................................56
5.8 Cleaning the Instrument ..........................................................................................................56
SECTION 6. FACTORY DEFAULT SETTINGS..................................................................................57
SECTION 7. SENSOR PRINCIPLE.....................................................................................................59
7.1 Electrochemical Sensors.........................................................................................................59
7.2 Catalytic Bead Sensors ...........................................................................................................59
7.3 Semiconductor Sensors ..........................................................................................................59
7.4 Infrared Sensors......................................................................................................................60
SECTION 8. DISPOSING OF THE INSTRUMENT .............................................................................61
8.1 Disposing of Electrical and Electronic Equipment...................................................................61
8.2 Disposing of Electrochemical Sensors....................................................................................61
SECTION 9. TECHNICAL DATA.........................................................................................................62
9.1 General Specifications.............................................................................................................62
9.2 Sensor Specifications..............................................................................................................63
9.3 Modbus Registers....................................................................................................................64
9.3.1 Analog Input Registers...............................................................................................65
9.3.2 Analog Output Registers ............................................................................................67
9.3.3 Input Status Flags.......................................................................................................69
9.3.4 Output Status Flags....................................................................................................70
SECTION 10. ORDERING INFORMATION ..........................................................................................72
10.1 MGS-550 Instrument Only.......................................................................................................72
10.2 MGS-550 Gas Detector, IP66 with IP66 Sensor.....................................................................72
10.3 MGS-550 Ex d Instruments with Sensing Heads....................................................................74
10.4 MGS-550 Gas Detector, Ex d Enclosure with Ex d Sensing Head.........................................74
10.5 MGS-550 5m Remote and Second Sensing Heads................................................................75
10.6 MGS-550 Replacement Parts and Accessories......................................................................78
SECTION 11. DECLARATION OF CONFORMITY...............................................................................79
www. .com [e-mail]1.800.561.8187

MGS-550 Fixed Gas Detector
P/N: 1100-1000 Version 1 5
SECTION 1. SAFETY
1.1 Definition of Alert Icons
The following alert icons are used in this document to highlight areas of the associated text that require a
greater awareness by the user.
Alert Icon Description
DANGER
Indicates an imminently hazardous situation which, if not avoided, will
result in death or serious injury.
WARNING
Indicates a potentially hazardous situation which, if not avoided, could
result in death or serious injury.
CAUTION
Indicates a potentially hazardous situation which, if not avoided, could
result in physical injury or damage to the product or environment. It may
also be used to alert against unsafe practices.
NOTICE
Indicates additional information on how to use the product.
1.2 General Safety Statements
•Before using this product, carefully read and strictly follow the instructions in the manual.
•Use the product only for the purposes specified in this document and under the conditions
listed.
•Ensure that product documentation is retained, made available, and appropriately used by
anyone operating the product.
•Comply with all local and national laws, rules, and regulations associated with this product.
•Only trained and competent personnel may use this product.
•Only trained and competent personnel may inspect, repair and maintain the product as
detailed in this manual. Maintenance that is not detailed in this manual must be completed by
Bacharach or personnel qualified by Bacharach.
•Use only genuine Bacharach spare parts and accessories. Otherwise, operation may be
impaired.
•Only operate the product within the framework of a risk-based alarm signaling concept.
1.3 Safe Connection of Electrical Devices
•Before connecting this instrument to electrical devices not mentioned in this manual, consult
the manufacturer or a qualified professional.
www. .com [e-mail]1.800.561.8187

MGS-550 Fixed Gas Detector
6 P/N: 1100-1000 Version 1
SECTION 2. DESCRIPTION
2.1 Product Overview
The Bacharach MGS-550 continuously monitors indoor or outdoor ambient air for the following gases:
•toxic and combustible gases
•oxygen
•refrigerants.
The instrument is housed in one of the following:
•rugged ABS enclosure (general purpose or “GP” housing)
•aluminum enclosure (explosion-proof or “XP” housing).
The instrument can be connected to a Bacharach monitoring system or a Programmable Logic Controller
(PLC). With the integrated alarm relay, the instrument can be operated as a stand-alone unit (with
additional local alarm signaling). The instrument is designed to be installed in non-classified, non-
hazardous, permanent locations.
WARNING
Danger of explosions. This product is neither certified nor approved to be operated in
oxygen-enriched atmospheres.
WARNING
The device is not
intended to be used in areas classified as hazardous.
www. .com [e-mail]1.800.561.8187

MGS-550 Fixed Gas Detector
P/N: 1100-1000 Version 1 7
2.2 Key Product Features
•Enclosure options:
oGeneral-purpose (GP): ABS plastic housing (rectangular)
oExplosion-proof (XP): Aluminum housing (round)
•Power options (refer to section 9.1: General Specifications on page 62):
o24 VAC
o19.5 to 28.5 VDC
•Multi-function, 5-digit LED display
ogas concentrations
ostatus messages
omenu choices
•Diagnostic/status LEDs (3)
•Configurable output signal (based on measured gas concentration):
oAnalog output 4 to 20 mA
oAnalog output 0 to 5 V
oAnalog output 0 to 10 V
oAnalog output 1 to 5 V
oAnalog output 2 to 10 V
oDigital output Modbus RTU signal
•Independently configurable analog outputs (2)
•Redundant sensor mapping option (one sensor can be mapped to both analog outputs)
•Multi-wire signal transmission configurations:
oAnalog1 sensor (2-wire)
oAnalog2 sensors (3-wire or 4-wire)
oDigital Modbus communications (2-wire plus ground)
•Menu navigation options:
oInternal buttons to use if the cover is removed
oNon-intrusive magnetic wand to use on external adjustments points on the cover
•Non-intrusive magnetic wand can be used to configure, calibrate, and maintain the device
www. .com [e-mail]1.800.561.8187

MGS-550 Fixed Gas Detector
8 P/N: 1100-1000 Version 1
2.3 General Purpose Option
www. .com [e-mail]1.800.561.8187

MGS-550 Fixed Gas Detector
P/N: 1100-1000 Version 1 9
2.4 Explosion Proof Option
www. .com [e-mail]1.800.561.8187

MGS-550 Fixed Gas Detector
10 P/N: 1100-1000 Version 1
2.5 Sensor Styles
For General Purpose (GP) Enclosure For Explosion Proof (XP) Enclosure
Local Sensor
5 m (16 ft) Remote Sensor
www. .com [e-mail]1.800.561.8187