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User Manual - Bacharach, Inc.

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1. The Measurable Difference MGS 550 Fixed Gas Detector User Manual Installation e Operation e Configuration e Troubleshooting P N 1100 1000 August 21 2015 Version O Product Leadership e Training e Service e Reliability MGS 550 Fixed Gas Detector 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 numbe
2. Sensor Microprocessor Board Sensor Connector J2 Connector J1 Connector J3 Standoff Hole RELAY 1 NG Pin 10 Ai Pin 9 RELAY 10 MC Relay Wiring a B ANALOG our 2 Power and Signal Wiring Terminal Block T2 E Terminal Block T1 t we 4 CN d Pin 18 Vr Sla n e Pin 1 Standoff Hole Standoff Hole Buzzer Connection Description Pin Label Wiring Termination 1 24VDC AC 24 VAC line 24 VAC PWR GND 24 VAC neutral Power z 24VDC AC 24 VDC positive 24 VDC PWR GND 24 VDC ground ANALOG 1 GND Analog output 1 ground Analog Output 1 ANALOG OUT 1 Analog output 1 signal Analog Output ANALOG 2 GND Analog output 2 ground Analog Output 2 ANALOG OUT 2 Analog output 2 signal 7 RS 485 GND RS 485 shield A RS 485 A non inverted B RS 485 B inverted For 3 wire single sensor DC installations connect pins 1 and 2 of 24 VDC and connect pin 4 to the analog input of the control system For 4 wire dual sensor DC installations connect pins 1 and 2 of 24 VDC connect pin 4 to one analog input of the control system and connect pin 5 to another input of the control system Modbus Network Digital Output Communications e f central monitoring or a PLC is used connect the signal cable shielding at the controller only e fan analog output is unused and configured as a 4 to 20 mA output then the corresponding output connectors must be shorted
3. 410 can take an 410 10 of A1 04 output below zero full scale 40027 Analog Output 1 Full Scale PPM Va 40028 Analog Output 2 Source 1 Sensor 1 2 Sensor 2 40029 Analog Output 2 Type 0 0t05V 121t05V oS A1 03 A2 01 A2 02 2 0to 10V 3 2t0 10V 4 4t020mA 40030 Analog Output 2 Scaling 20 to 100 of full scale 40031 Analog Output 2 Offset 410 can take an 410 10 of A2 04 output below zero full scale 40032 Analog Output 2 Full Scale PPM ee 40033 Relay 1 Contact Behavior Failsafe 0 NO 1 Failsafe 40034 Relay 2 Contact Behavior Failsafe 0 NO 1 Failsafe 40035 Relay 3 Contact Behavior Failsafe 0 NO 1 Failsafe 40036 Relay 1 Source See 4 4 2 Relay 40037 Relay 2 Source UN eee XX on page 32 40038 Relay 3 Source 40039 A2 03 o o R1 01 R2 01 R3 01 R1 02 R2 02 R3 02 B1 01 See 4 4 7 Buzzer Designation B1 Xx on page 35 Buzzer enable and source D Q o 8 y Z pa IE e e E e e e c D n le 3 e MGS 550 Fixed Gas Detector Reg Description Range Units Menu 40040 Critical Fault Latch ee 40041 Instrument electronics fault code See 5 3 4 Non D 01 Critical E300 Faults on page 42 and 5 3 3 Critical Faults on page 41 Instrument electronics last fault See 5 3 4 Non D 02 Critical E300 Faults on page 42 and 5 3 3 Critical Faults on page 41 40043 Power supply voltage 15 5 28 5
4. I I I N I I PY IPS IPS l lalla e ss P N 1100 1000 Version 0 Internal Display Bezel Top Layer Processor Middle Layer iddle Layer with Keyed Ribbon Cable Interface Board Bottom Layer Sensor Connector J3 r J 24VDC AC 47 MGS 550 Fixed Gas Detector 5 4 5 Adding a Second Sensor Description Power down the instrument Open the housing For the GP housing e Loosen the four screws of the lid using an M5 hex key and remove the lid im Using a flat head screwdriver loosen the three screws and carefully pull out the bezel from the enclosure Remove an unused plug from the enclosure if necessary Feed the connector end of the sensor assembly into the enclosure For the GP housing e Screw cable gland with attached gasket into the housing and tighten maintain IP rating Plug the new sensing head connector into the open sensor connector socket on the interface board Place the bezel back into the enclosure and secure with the three screws to the standoffs Replace the enclosure lid as appropriate Power up the instrument The instrument will prompt to start the sensor registration e g rEg 2 Acknowledge with ENTER The instrument will then indicate successful registration e g PASS 2 Sensor Connector J2 48 SCREW LOCATIONS ELECTRONICS CIRCUIT BOARD BENEATH BEZEL SHOWING RIBBON CABLE TO I
5. R1 02 Relay 1 Source 1 Sensor system 01 Relay 2 Contact Behavior normally open Failsafe P N 1100 1000 Version 0 57 MGS 550 Fixed Gas Detector Parameter Name Factory Default Changed To Relay 3 Contact Behavior 0 normally open Failsafe BL et Nam ON Delay vae 00 nodelay Nam OFF Delay vawe 00 nodelay Cric FautLatching reei Aarm Acknowedge Timeout somis J Favalog Output 1 Source iSense FAnalog Ouput Type 4 4 3mk Analog Output Offset Jozo J Analog Output 2 Source i Semai oooo Mnao Output2Type azam Analog Output 2 Scaling rooz tutscale Analog Output 2 ots Lozo J BEEN Asdessionais li BEEN BEEN BEEN Modbus slave termination Buzzer enable and source 14 any alarm or sensor fault or critical instrument fault 58 P N 1100 1000 Version 0 MGS 550 Fixed Gas Detector SECTION 7 SENSOR PRINCIPLE 7 1 Electrochemical Sensors Electrochemical sensors measure the partial pressure of gases under atmospheric conditions The monitored ambient air diffuses through a membrane into the liquid electrolyte in the sensor The electrolyte contains a measuring electrode a counter electrode and a reference electrode An electronic potentiostat circuit ensures a constant electrical voltage between measuring electrode and reference electrode Voltage electrolyte and electrode material are selected to suit the gas being monitored so that it is transformed electro
6. be sure to de register the sensor s first and then register them one at a time Refer to the following sections e 4 3 8 De register All Sensors and Reset Node Address F 08 on page 27 e 4 3 7 De register One Sensor F 07 on page 27 e 4 3 6 Register Sensor F 06 on page 26 Item Description Replacement Instructions See figure above See figure above See figure above See figure above 5 Sensor control board 5 4 3 Replacing the Sensor Control Board on page 46 Sensor module sensor 5 4 2 Replacing the Sensor Module on page 45 Eat PCB See igs above used with SC combustible and SC VOC sensors 2 2 I 9 Sensingheadcap Seefigure above 44 P N 1100 1000 Version 0 5 4 2 Replacing the Sensor Module See illustration in section 5 4 1 Components Overview on page 44 o e 0 Ke Description Power down the instrument Unscrew M40 locknut item 10 Pull sensor cap item 9 down Remove sensor spacer optional on certain sensors if it is in place Remove foam gasket item 8 if it is adhered to the sensor module Remove the sensor module item 6 from sensor control board item 5 With flat edges of PCBs aligned plug new sensor module into sensor control board sensors is in place if applicable Ensure that the round foam gasket is in place and not deformed Slide the sensing head cap back on the sensing head base Ensure that O Ring item 4 is in
7. otherwise a fault will occur For unused analog output 1 configured as 4 to 20 mA output wire pin 3 to pin 4 For unused analog output 2 configured as a 4 to 20 mA output wire pin 5 to pin 6 These jumper wires are installed at the factory but should be removed for voltage outputs or if connections are made to the analog outputs 14 P N 1100 1000 Version 0 MGS 550 Fixed Gas Detector 3 4 3 Relay Wiring At voltages 30 VAC or 42 2 VDC the relay cables must be enclosed in protective conduit or double insulated cables must be used WARNING e Using appropriate cable glands and or conduit connect the wires for relay 1 relay 2 and relay 3 to the terminals see previous wiring figure as indicated in the following wiring table Note that any one of 6 alarms or 3 fault types may be mapped to any relay Function Pin Label Wiring Termination To change relay designations see section 4 4 2 Relay Designation RX xx on page 32 For default values see section 6 Factory Default Settings on page 57 When configured according to the factory default settings the relays are de energized during normal operation not fail safe Fail safe mode can be configured See section 4 4 2 Relay Designation RX xx on page 32 The terminal designators in the previous wiring table show factory defaults and normal operation mode To ensure that a fault is easily recognized that is without needing to look directly at the instrum
8. several faults may be reported at the same time see section 5 3 1 Hexadecimal Format on page 39 for more information For example fault code 0003 is a combination of fault codes 0001 No sensor signal and 0002 sensor board hardware fault See D 07 through D 10 42 P N 1100 1000 Version 0 MGS 550 Fixed Gas Detector If a last fault attribute D 08 or D 10 indicates that a fault has occurred at some point in time but the corresponding current fault attribute D 07 or D 09 shows no fault then the problem has self healed and no service action is required NOTICE Code Sensor Fault Possible Causes Remedy 0001 No sensor signal Cannot detect sensor Check all connections in the sensing head Check connections to the interface board 0002 Sensor board hardware Cannot read EEPROM or analog Check all connections in fault front end the sensing head 0004 EEPROM checksum fault Error reading EEPROM Replace sensor module 0008 Zero adjust out of range Field zero adjustment exceeds Perform zero adjustment limits 0010 Span adjustment out of Field span adjustment exceeds Perform span adjustment range limits 0020 Input voltage fault Power supply voltage out of range 0040 Microprocessor fault MPU clock fault 0080 Software fault Firmware error Power cycle If it re occurs then call service 0100 RS485 receiver fault Receiver buffer full message too Power cycle If it re long to receive buffer oc
9. 08 Two sensors connected to the instrument that have the same node address will result in a fault Function F 08 can be used to recover from this situation by resetting the registration of all sensors and resetting their node addresses to 100 Tap ENTER The instrument will show Reset Tap ENTER to confirm reset Instrument will show a second confirmation sure Tap ENTER again to reset the node address Pass will be displayed Unplug the sensors Plug in one sensor and register it See section 4 3 6 Register Sensor F 06 on page 26 Plug in second sensor and register it Be sure to plug in the sensors and re register them one at a time to avoid address conflicts P N 1100 1000 Version 0 27 MGS 550 Fixed Gas Detector Before unplugging ANY sensor it must be de registered using function F 07 Failure to do this will require you to de register all sensors using F 08 with the sensors still connected to the main electronics remove the sensors and then re install and re register the sensors one at a time using function F 06 CAUTION lf the sensors are not connected when an F 08 is performed then their node addresses will not be reset 4 3 9 Diagnostics System Information and Fault Data F 09 This function will display any diagnostics and fault codes e Tap ENTER to initiate the function e Use the UP DOWN keys to select a diagnostics code e After tapping ENTER the respective code wi
10. 1000 Version 0 59 MGS 550 Fixed Gas Detector Certain substances in the environment to be monitored may impair the sensitivity of the Sensors 1 Materials containing silicone or silicone rubber putty 2 Corrosive gases such as hydrogen sulfide sulfur oxide chlorine hydrogen NOTICE chloride etc 3 Alkaline metals salt water spray 7 4 Infrared Sensors The infrared IR gas sensor is designed to measure the concentration of combustible gases and vapors in the ambient air The sensor principle is based on the concentration dependent absorption of infrared radiation in measured gases The monitored ambient air diffuses through a sintered metal material into the housing of an optical bench The broadband light emitted by an IR source passes through the gas in the optical bench and is reflected by the walls from where it is directed towards a dual element detector One channel of the detector measures the gas dependent light transmission while the other channel is used as a reference The ratio between measurement and reference signal is used to determine the gas concentration Internal electronics and software calculate the concentration and produce an output signal 60 P N 1100 1000 Version 0 MGS 550 Fixed Gas Detector SECTION 8 DISPOSING OF THE INSTRUMENT 8 1 Disposing of Electrical and Electronic Equipment EU wide regulations governing the disposal of electrical and electronic appliances which have been defined in th
11. 8000 MGS 550 Instrument ONLY IP66 For remote sensor applications order sensing heads below 10 2 MGS 550 Gas Detector IP66 with IP66 Sensor MGS 550 Gas Detector IP66 with IP66 Sensor Installed at the Factory 6600 8016 MGS 550 Gas Detector IP66 IR Butane 0 100 LEL 6600 8017 MGS 550 Gas Detector IP66 IR Methane 0 100 LEL 6600 8018 MGS 550 Gas Detector IP66 IR Propane 0 100 LEL 6600 8024 MGS 550 Gas Detector IP66 EC NO 0 20 ppm 6600 8025 MGS 550 Gas Detector IP66 EC O2 0 30 Vol 6600 8026 MGS 550 Gas Detector no IP rating EC Cl 0 10 ppm 6600 8027 MGS 550 Gas Detector no IP rating EC F2 0 1 ppm 6600 8028 MGS 550 Gas Detector no IP rating EC Os 0 1 ppm MGS 550 Gas Detector IP66 CT NHs 0 100 LEL 6600 8035 MGS 550 Gas Detector IP66 CT LPG 0 100 LEL 6600 8036 MGS 550 Gas Detector IP66 CT Methane 0 100 LEL 6600 8037 MGS 550 Gas Detector IP66 CT Toluene Xylene Jet Fuels heavy hydrocarbons 0 100 LEL 6600 8038 MGS 550 Gas Detector IP66 CT Propane 0 100 LEL 72 P N 1100 1000 Version 0 MGS 550 Fixed Gas Detector P MGS 550 Gas Detector IP66 with IP66 Sensor Installed at the Factory P N 1100 1000 Version 0 73 MGS 550 Fixed Gas Detector 10 3 MGS 550 Ex d Instruments with Sensing Heads In the descriptions below MGS 550 Gas Detector includes an instrument and one sensing head mounted directly to the instrument housing Remote
12. Char 3 4 Oto9 atoz ASCII Text 82 02 30050 PET Instrument electronics UID Char ASCII Text 30041 30047 30051 Sensor 1 Module SID Char 1 2 ASCII Text 30052 Sensor 1 Module SID Char 3 4 ASCII Text 30053 Sensor 1 Module SID Char 5 NULL ASCII Text 30054 Sensor 2 Module SID Char 1 2 Oto9 atoz ASCII Text D e o o P N 1100 1000 Version 0 MGS 550 Fixed Gas Detector Reg Description Range Units Param 30055 Sensor 2 Module SID Char 3 4 ASCII Text 30056 Sensor 2 Module SID Char 5 NULL ASCII Text 9 3 2 Analog Output Registers Analog output registers are readable using function code 03 and writable using function code 06 Reg Description Range Units Menu 40001 Display Mode oomen lt PION 40002 RS 485 Node Address itozso gt MBOi 40009 audi Ratt__ o eso0 i is200 MO xw soms Tio WBos 2 Even 40011 Sensor 1 Low Alarm ppb ppm LEL or 0 to sensor full Unit Vol Note LEL and Vol sensors scale dependent are always displayed as x 10 the actual value For example a reading of 205 is 20 5 Sensor 1 Med Alarm ppb pom LEL or 0 to sensor full Unit Vol Note LEL and Vol sensors scale dependent are always displayed as x 10 the actual value For example a reading of 205 is 20 5 Sensor 1 High Alarm ppb ppm LEL or 0 to sensor full Unit Vol Note LEL and Vol sensors scale depen
13. Instrument electronics UID Char 3 4 0to9 atoz ASCII Text 1 02 30030 E Instrument electronics UID Char ASCII Text 30031 Sensor 2 Type Code 52 09 1 ppm Displ 2 isplay units Sensor 3 Vol S2 10 4 9eL EL Full Scale in ppb ppm LEL or Vol Sensor 2 Note LEL and Vol sensors Unit are always displayed as x 10 the actual 0 to 65535 Senda value For example a reading of 205 is p 20 5 30034 Sensor 2 Gas Type Text Char 1 2 ASCII Text 30035 Sensor 2 Gas Type Text Char 3 4 ASCII Text S2 01 30036 Sensor 2 Gas Type Text Char 5 NULL ASCII Text LEL Vol Conversion Factor 10 Sensor 2 Unit 30037 This is the factor to convert the integer gas 0 to 65535 Wissen output level from LEL or Vol to ppm P 30038 Alarm Low Set Point Sensor 2 O to 100 96 Full scale 30032 30033 52 11 30039 Alarm Medium Set Point Sensor 2 30040 Alarm High Set Point Sensor 2 Concentration ppb ppm LEL or Vol Sensor 2 Note LEL and Vol sensors Unit are always displayed as x 10 the actual 0 to 65535 den ndani value For example a reading of 205 is p 20 5 30044 ppm Hours Sensor 2 upper long integer ppm Hours 30045 ppm Hours Sensor 2 lower long integer 30046 Temperature Deg C Sensor 2 40 to 80 See 5 3 5 16 bit Fault Code Sensor 2 Sensor Faults on page 42 30048 Sensor 2 Instrument electronics UID Char 1 2 Oto 9 atoz ASCII Text 30049 Sensor 2 Instrument electronics UID
14. MAINTENANCE lia 36 Sil Maintenance IMenNal S snenia a a e a lubed 36 P N 1100 1000 Version 0 3 MGS 550 Fixed Gas Detector 5 2 Making Adjustments to SEnSors 36 dii ANOANO sever accessors orn ela 36 See General PFOGGOUre rcsrr ala 37 9 2 9 Zero AGIUSIMENI lena 38 S Moi Eie DE UU aap daueneneBaradeaesceeaesebanecwecisenAuetenes 38 9 2 5 SySieMtBUmp TesL adele ib 38 dis TroubIESsheGCliig ille 39 93 1 Hexadecimal FONTAN nerais aa A a 39 5 32 Diagnostics AUAIDUES arr ear 39 5 3 3 Instrument Electronics Critical E100 Faults i eececccesseeeeseeeeeseseeesseeeeeeneaeees 41 5 3 4 Non Critical E300 Faults nnns 42 5 3 05 Sensor FaullsS 2 1 e ati rr 42 5 4 Sensor Maintenance General Purpose HOUSINGs 44 5 4 1 Components Overview ei 44 5 4 2 Replacing the Sensor Module e 45 5 4 3 Replacing the Sensor Control Board i 46 5 4 4 Replacing the Local Sensing Head ASSemMDIY i 47 545 Adding a Second Sensor c aero 48 5 4 6 Replacing the Remote Sensing Head Assembly sseesesessss 49 5 5 Sensor Maintenance Explosion Proof HOUSINgs i 50 551 Components OVelVIQW s richieda 50 5 5 2 Replacing the Sensor Module ccccccccccssseeeeeeeeeeeceeecaueeceeeseeeeeceessaeaeeseeeeaaageeees 51 5 5 3 Replacing the Se
15. control board requires sensor registration See section 4 3 6 Register 6 Sensor F 06 on page 26 16 Verify calibration 46 P N 1100 1000 Version 0 MGS 550 Fixed Gas Detector 5 4 4 See illustration in section 5 4 1 Components Overview on page 44 Replacing the Local Sensing Head Assembly Description Deregister the old sensor see section 4 3 7 De register One Sensor F 07 on page 27 2 Power down the instrument 3 Loosen the four screws of the lid using an M5 hex key and remove the lid Using a flat head screwdriver loosen I Kr Ke the three screws and carefully pull out the bezel from the enclosure 5 Unplug the old sensing head Unscrew the old sensing head Screw sensing head with attached gasket into the housing and tighten maintain IP rating ELECTRONICS CIRCUIT BOARD BENEATH BEZEL SHOWING RIBBON CABLE TO INTERFACE Plug new sensing head connector into socket Place bezel back into the enclosure and secure with the three screws to the standoffs 10 Put lid back on and tighten the four SCrews 11 Power up instrument The instrument will prompt to start the sensor registration e g rEg 1 Acknowledge with ENTER The instrument will then indicate successful registration e g PASS 1 Microprocessor Board Connector J1 Sensor Connector J2 ENSE d X X 12 ES g i L LT a fl RELAY 1 NC I
16. display PCB Assembly MGS 550 GP XP Ribbon Cable MGS 550 GP XP Connects top and bottom PCBs Accessory Kit MGS 550 GP Includes spare cable glands and blanking plugs gaskets Sensing Head Common Control PCBA MGS 550 GP XP Sensing Head Front End Kit MGS 550 GP IP66 Includes lock nut nosepiece with membrane O ring sensor foam spacers and splash guard with calibration port Also included are gaskets to be used as follows Gasket Gasket Sensor P N Thickness Type Applicable Sensor s 6600 8406 CO O2 SO 1100 0031 9 5 mm NH3 LPG Methane Propane Butane Toluene Xylene Jet Fuels 1100 0030 EC SC All other sensors HCI and Os instruments Sensing Head Front End Kit MGS 550 GP No IP Rating Includes lock nut nosepiece without 6600 8407 membrane o ring gasket sensor foam spacers splash guard with calibration port For Clo F2 78 P N 1100 1000 Version 0 MGS 550 Fixed Gas Detector SECTION 11 DECLARATION OF CONFORMITY C DECLARATION OF CONFORMITY The manufacturer of the Murco Ltd Trading as Bacharach Inc products covered by this 114a George s Street Lower declaration Dun Laoghaire Ireland Year s conformity is declared 2015 06 15A The undersigned hereby declares that the above referenced product s are in conformity with the provisions of the following standards and are in accordance with the following directives Standard s IEC 61010 1 2010 3rd Edition EN 61010 1 2010 3rd
17. limited to 1 Polymerizing substances such as acrylonitrile butadiene and styrene NOTICE 2 Corrosive compounds such as halogenated hydrocarbons releasing halogens such as bromine chlorine or fluorine when oxidized and halogen hydride acids as well as acidic gaseous compounds such as sulfur dioxide and nitrogen oxides 3 Catalyst poisons such as sulfurous and phosphorous compounds silicon compounds especially silicones and metal organic vapors It may be necessary to check the calibration if the sensor has been exposed for a long time to a high concentration of flammable gases vapors or the above mentioned contaminating substances 7 3 Semiconductor Sensors Semiconductor or metallic oxide sensors MOSs are among the most versatile of all broad range sensors They can be used to detect a variety of gases and vapors in low ppm or even combustible ranges The sensor is made up of a mixture of metallic oxides They are heated to a temperature between 150 and 300 C depending on the gas es to be detected The temperature of operation as well as the recipe of mixed oxides determines the sensor selectivity to various toxic gases vapors and refrigerants Electrical conductivity greatly increases as soon as a diffusion process allows the gas or vapor molecules to come in contact with the sensor surface Water vapor high ambient humidity temperature fluctuations and low oxygen levels can result in higher readings P N 1100
18. new sensor module into sensor control board Screw on the sensing head cap to the sensing head base hand tight Tighten the set screw in the sensing head cap Power up the instrument 10 Verify calibration 52 P N 1100 1000 Version 0 MGS 550 Fixed Gas Detector 5 5 4 Replacing the Local Sensing Head Assembly See illustration in section 5 5 1 Components Overview on page 50 Power down the instrument Loosen the set screw 1 5 mm hex key and unscrew lid from instrument Step Description Using a flat head screwdriver loosen the three screws and carefully pull out the bezel from the enclosure Unplug the old sensing head ELECTRONICS J CIRCUIT BOARD Unscrew the old sensing head BENEATH BEZEL SHOWING Screw sensing head into the RIBBON CABLE housing and tighten maintain Ex d rating 4 5 TO INTERFACE 7 Plug new sensing head connector into socket Internal Display Bezel Place bezel back into the Top Layer enclosure and secure with the borar three screws to the standoffs Board Middle e Screw on lid until it is seated m A Keye ibbon Cable then tighten the set screw maintain Ex d rating 10 Power up instrument The instrument will prompt to start the sensor registration e g rEg 1 Acknowledge with ENTER The instrument will then indicate successful registration e g PASS 1 Interface Board Bottom Layer Sensor Microprocessor Bo
19. of Interface Board in E Place bezel and attached Processor Board back into the enclosure and secure with the three screws to the t em Interface Board standoffs Bottom Layer 10 Power up instrument Register the sensor s both sequentially if applicable See section 4 3 6 Register Sensor F 06 on page 26 12 Place bezel back into the enclosure and secure with the three screws to the standoffs Replace the housing lid maintain IP or Ex d rating e For general purpose GP enclosure tighten the four screws of the lid using an M5 hex key e For the explosion proof XP enclosure screw on the lid until it is seated then tighten the set screw 1 5 mm hex key Check settings of the parameters see section 4 4 Parameters on page 29 perform an instrument test see section 4 3 4 Instrument Test F 04 on page 25 and check calibration see section 5 2 4 Span Adjustment on page 38 P N 1100 1000 Version 0 55 MGS 550 Fixed Gas Detector 5 7 Replacing the Interface Board This product uses semiconductors which can be damaged by electrostatic discharge ESD When handling the PCB care must be taken so that the electronics are not damaged CAUTION Description Power down the instrument Remove the housing lid e For general purpose GP enclosure loosen the four screws of the lid using an M5 hex key and remove the lid e For the explosion proof XP enclosure loosen the set screw 1 5
20. place Screw locknut back on until it clicks three times hand tight while compressing the sensor cap against the base Power up the instrument EB Ensure that the spacer optional item 7 on certain Verify calibration P N 1100 1000 Version 0 MGS 550 Fixed Gas Detector 45 MGS 550 Fixed Gas Detector 5 4 3 Replacing the Sensor Control Board See illustration in section 5 4 1 Components Overview on page 44 Step Description 1 Power down the instrument 2 Unscrew M40 locknut item 10 3 Pull sensor cap item 8 down 4 Hemove sensor spacer optional on certain sensors if it is in place if applicable 5 Remove foam gasket item 7 if it is adhered to the sensor module mE Pull out sensor and PCB stack items 5 and 6 from the sensing head base item 3 7 Remove sensor control board item 5 from sensor module item 6 With flat edges of PCBs aligned plug new sensor module into sensor control board Plug PCB stack with sensor back into sensing head base 10 Ensure that the spacer optional on certain sensors is in place if applicable 11 Ensure that the round foam gasket is in place and not deformed 1 Slide the sensing head cap back on the sensing head base 13 Ensure that O Ring item 4 is in place 4 Screw locknut back on until it clicks three times hand tight while compressing the 1 sensor cap against the base 1 1 5 Power up the instrument Replacing the sensor
21. set the output for interface test purposes e g to check the programming of a central controller Tapping ENTER will set the analog output to the level equivalent to zero gas For a 4 to 20 mA configuration this output will be 4 mA for a 1 to 5V configuration this output will be 1 V and so on Use the UP DOWN key to change the value of the zero output After tapping ENTER the analog output will be set to fu scale Use the UP DOWN key to adjust the value of the full scale output Changing the analog outputs can trigger alarms in connected equipment NOTICE 3 Display The display test lights up all segments and LEDs 4 3 5 Parameter Menu F 05 Use this function to access the parameter menu See section 4 2 4 Menu Overview on page 23 and section 4 4 Parameters on page 29 for detailed information 4 3 6 Register Sensor F 06 Function F 06 is used to register a new sensor without having to cycle power In general sensor registration is the association of parameters in the instrument to the set in the sensor Registration occurs at the factory for the local sensor and is based on the sensor configuration that is ordered If the sensor configuration must be changed e g changing a sensor type or adding a second sensor then the new sensor must be registered Before unplugging ANY sensor it must be de registered using function F 07 Failure to do this will require you to de register all sensors using F 0
22. steady signal 0to 5V 1to5V Oto 10 V 2 to 10 V selectable During fault condition 1 to 5 V and 2 to 10 V outputs are 0 V Modbus RTU over Baud rate 9 600 or 19 200 selectable R SANS 1 Dali I vadtoa anti heats e a east 8 Iii None odd even selectable SOO DIIS iii alieni 1 or 2 selectable Retry time 500 ms min time between retries End of message zustiosasbiwii Bebe Dobubet ne silent 3 5 characters Power Supply Operating voltage 19 5 to 28 5 VDC 24 VAC x 2096 50 60 Hz Operating current 0 25 mA at 24 VDC max Relay rating 3 SPDT arbitrary designation 1 A at 24 VAC VDC 0 5 A at 125 VAC resistive load Audible alarm Internal Buzzer 285 dB at 4 10 cm open enclosure Alarm delay 0 to 15 minutes selectable Wiring Power and analog 2 3 or 6 core shielded cable 16 to 20 AWG 0 5 to signal 1 5 mm Modbus network 2 core twisted pair shielded cable 16 to 20 AWG 0 5 to 1 5 mm with 120 Ohm characteristic impedance Cable gland M20x1 5 0 24 to 0 47 6 to 12 mm outer cable diameter Physical Enclosure and General Purpose GP ABS Specifications sensor rem e Proof XP Aluminum Enclosure Enclosure protection IP66 sss Display 5 digit 7 segment LED Enclosure Size General Purpose GP 210x225x85 mm 8 3x8 9x3 1 in WxHxD Approx Explosion Proof XP 125x190x90 mm 4 9x7 5x3 5 in Weight Approx General Purpose GP 1 kg 2 lbs Explosion Proof XP 1 6 kg 3 5 Ibs 62 P N 1100 1
23. weatherproof within environmental specifications and suitable for outdoor installation Each instrument must be installed and operated in an environment that conforms to the specifications listed in section 9 Technical Data on page 62 P N 1100 1000 Version 0 11 MGS 550 Fixed Gas Detector 3 3 Mechanical Installation Select a mounting location that is accessible for maintenance and adjustment Ensure that any targeted gas or vapor has unobstructed access to the sensor Consider implications of the future use of accessories and maintenance equipment Ensure that the mounting surface is flat and plumb Use the drilling template for proper positioning see Installation Guide P N 1100 0999 Ensure that any installed sensor is pointing downwards Bacharach recommendations using M5 bolts or smaller with hex socket caps to mount the device 3 4 Electrical Installation 3 4 1 Preparations Ensure wiring for relays and connections for sensor s are made before applying power CAUTION This product uses semiconductors which can be damaged by electrostatic discharge ESD When handling the printed circuit boards PCBs observe proper ESD precautions so that the electronics are not damaged CAUTION For unused 4 to 20 mA analog outputs ensure that the wire bridge pin 3 to 4 and pin 5 to 6 is installed Otherwise a fault may be displayed if the wiring does not match the configuration The analog outputs are des
24. with a soft cloth using water and a mild detergent Rinse with water 56 P N 1100 1000 Version 0 MGS 550 Fixed Gas Detector SECTION 6 FACTORY DEFAULT SETTINGS Parameter Name Factory Default Changed To 101 oensor 1 Gas Name oensor dependent 102 Sensor 1 UID 5 digits alohanumeric Sensor 1 Low Alarm Sensor dependent ppb ppm LEL Vol sensor 1 Medium Alarm Sensor dependent ppb ppm LEL Vol Sensor 1 High Alarm Sensor dependent ppb ppm LEL Vol Sensor 1 Low Alarm Behavior 2 non latching S1 07 Sensor 1 Medium Alarm Behavior latching not ande Sensor 1 High Alarm Behavior latching not part Ae Sio Sensori Type Gode digit aipnanumeie St Sensori Unis Sensordepengen Stn Sensori FulSede Sensordepengen siz Sensori Testre O semoOK Sao Sensor2GasName Sensordependen sach SeworzUD sagts alphanumeric _ Sensor 2 Low Alarm Sensor dependent ppb ppm LEL Vol Sensor 2 Medium Alarm Sensor dependent ppb ppm LEL Vol Sensor 2 High Alarm Sensor dependent ppb ppm LEL Vol Sensor 2 Low Alarm Behavior 2 non latching MANN 52 07 Sensor 2 Medium Alarm Behavior latching not sinodo Sensor 2 High Alarm Behavior latching not ariani sie S209 Sensor2Type Code dii alphanumeric S240 Sensor2Unis Sensor dependent Shi Sensor2Ful Scale Sensor dependent se Sensore Tettes o seworok 0 Relay 1 Contact Behavior normally open Ser
25. 000 Version 0 MGS 550 Fixed Gas Detector Category Specifications Environmental 40 to 120 F 40 to 50 C Storage temperature 5 to 100 F 20 to 40 C Humidity 5 to 90 RH non condensing 20 7 to 38 4 in of Hg 700 to 1300 hPa Elevation 0 to 10 000 ft 3050 m altitude See Section 9 2 Sensor Specifications on page 63 Influences For influences on the measurement performance and restrictions of a particular sensor see sensor data sheet Agency CE UL CSA IEC EN 61010 1 Approvals Certifications For instruments assembled in USA TUV SUD For instruments assembled in Ireland NSAI 9 2 Sensor Specifications Sensor Information Electro Chemical Semi Conductor Catalytic Bead Infrared 30 SC CAT IR 20 to 40 C 40 to 402 C 40 to 50 C 40 to 50 C 40 to 50 C Temperature Range 4 to 104 F P o A A s 40 to 1042 F 40 to 122 40 to 122 40 to 122 EC Sensors Formula Measuring Range s Ammonia Nh 009100 0101000 0105000ppm ateneo 0 oeron 000 1 For NH sensor 0 to 100 ppm and 0 to 1 000 ppm only No IP rating not available in Ex d P N 1100 1000 Version 0 63 MGS 550 Fixed Gas Detector IR Sensors Formula Measuring Range 0 to 5 000 ppm 0 to 0 5 Vol 0 to 10 000 ppm Oto 1 Vol 0 to 20 000 ppm 0 to 2 Vol 0 to 30 000 ppm 0 to 3 Vol 0 to 40 000 ppm 0 to 4 Vol 0 to 50 000 ppm 0 to 5 Vol Carbon Dioxide CAT Sensors Formul
26. 1000 Version 0 MGS 550 Fixed Gas Detector 5 3 3 Instrument Electronics Critical E100 Faults Critical faults are indicated by E 100 on the display Critical faults indicate a functional problem that results in the gas detector no longer monitoring reliably See D 01 and D 02 Code Critical Fault Possible Causes Remedy 0200 Sensor 1 No sensor or sensor Replace sensor critical fault defective sensor Sensor removed and Deregister sensor then remove See section 4 3 7 not deregistered De register One Sensor F 07 on page 27 Two with same node De register both sensors and re register them one address at a time See section 4 3 8 De register All Sensors and Reset Node Address F 08 on page 27 and section 4 3 6 Register Sensor F 06 on page 26 0400 Sensor 2 Same as Sensor 1 Same as Sensor 1 See above critical fault See above 0800 Sensor 1 error Sensor is registered Sensor was removed Replace sensor 1000 Sensor 2 error Put not responding Sensor was replaced without re registration correctly or the wrong Register sensor See section 4 3 6 Register sensor installed sensor F 06 on page 26 One or more Input supply power to Correct the input supply voltage to restore normal power supply the MGS 550 is out operation See section 9 1 General Specifications voltages out of range on page 62 of range Micro Internal electronics Cycle power to the instrument processor hardwar
27. 8 with the sensors still connected to the main electronics remove the sensors and then re install and re register the sensors one at a time using function F 06 CAUTION lf the sensors are not connected when an F 08 is performed then their node addresses will not be reset Refer to CAUTION on the following page Generally a new sensor is discovered and registered automatically when the following occurs e power is shut off e the new sensor is connected and e power is then restored For example if you wish to add a second sensor to a previously installed single sensor system simply turn off power add the new sensor to the available previously unoccupied sensor connector and turn on power Upon power up the instrument will recognize and register the new sensor that you installed in the previously unfilled slot If it is inconvenient or impractical to cycle power to automatically register a new sensor then the process is performed manually using the Register Sensor function F 06 26 P N 1100 1000 Version 0 MGS 550 Fixed Gas Detector New sensors all have address 100 The first sensor registered will be sensor 1 and the second sensor 2 Resetting sensor registration through F 08 will reset them all to 100 then they need to be CAUTION 99istered one at a time To register a newly added sensor select F 06 and tap ENTER There are 3 possible scenarios Scenario Description Sensor is already If there is al
28. Edition UL 61010 1 3rd Edition Safety Standards CSA C22 2 No 61010 1 3rd Edition Elect ti iia di di Electrical Apparatus for the Detection and Measurement of RARO RIO COMPA Combustible Gases Toxic Gases or Oxygen EMC Standards YS Radio Disturbance Limits and Methods of Measurements for Industrial Scientific and Electrical Equipment for Measurement Control and Laboratory Use Part 1 General Requirements EN 55011 2009 A1 2010 MN Characteristics Medical ISM Radio Frequency Equipment Directive s 2004 108 EC Electromagnetic Compatibility Directive 2006 95 EC Low Voltage Directive Signature Name Philip Hassell Title Engineering Manager Date 13 May 2015 The technical documentation file required by this directive is maintained at the corporate headquarters of Murco Ltd P N 1100 1000 Version 0 79 MGS 550 Fixed Gas Detector World Headquarters 621 Hunt Valley Circle New Kensington Pennsylvania 15068 Phone 724 334 5000 Toll Free 1 800 736 4666 e Fax 724 334 5001 Website www MyBacharach com e E mail helo MyBacharach com NSAI Certified Europe 80 P N 1100 1000 Version 0
29. IRCUIT BOARD BENEATH BEZEL SHOWING RIBBON CABLE TO INTERFACE Internal Display Bezel Top Layer Processor Middle Layer iddle Layer with kd Ribbon Cable Interface Board Bottom Layer Microprocessor Board Sensor Connector J1 Connector J3 r J P N 1100 1000 Version 0 MGS 550 Fixed Gas Detector 5 6 Replacing the Instrument Electronics This product uses semiconductors which can be damaged by electrostatic discharge ESD When handling the PCB care must be taken so that the electronics are not damaged CAUTION Step Description 1 The user should note parameters settings such as alarm setpoints relay configurations etc as the unit will have factory settings after replacement of the processor board Power down the instrument Remove the housing lid e For general purpose GP enclosure loosen the four screws of the lid using an M5 hex key and remove the lid e For the explosion proof XP enclosure loosen the set screw 1 5 mm hex key and unscrew lid from instrument Using a flat head screwdriver loosen the three screws and carefully pull out the bezel and Processor Board as one unit from the enclosure Unplug ribbon cable from Interface Board Internal Display Bezel Remove the bezel from the processor Top Layer Board Processor Board Attach bezel to new Processor Board eme I Middle La ayer e with Keye Plug ribbon cable of new Processor i lt A Ribbon Cable Board into socket
30. NTERFACE BOARD Microprocessor Board Sensor Connector J1 Connector J3 P N 1100 1000 Version 0 MGS 550 Fixed Gas Detector 5 4 6 Replacing the Remote Sensing Head Assembly See illustration in section 5 4 1 Components Overview on page 44 Description Power down the instrument SCREW LOCATIONS Loosen the four screws of the lid using an M5 hex key and remove the lid Step MGS 550 Using a flat head screwdriver loosen the three screws and carefully pull out the bezel from the enclosure 4 Unplug the old sensing head ELECTRONICS CIRCUIT BOARD 5 Unscrew cable gland of old patata sensing head and remove RIBBON CABLE Screw cable gland into the housing and tighten maintain IP rating Plug new sensing head Internal connector into socket Display Bezel i _ Top Layer Place bezel back into the TO INTERFACE N Processor Middle Layer iddle Layer with ted enclosure and secure with the three screws to the standoffs wA Ribbon Cable Put lid back on and tighten the E four screws R E p 10 Power up instrument o AN The instrument will prompt to a E Interface Board start the sensor registration Bottom Layer e g rEg 1 Acknowledge with ENTER The instrument will then indicate successful Microprocessor Board Sensor registration e g PASS 1 Connector J2 Connector J1 Connector J3 RELAY 1 NG M RS485 GND RELAY2NGM j NALOG OU
31. Note The offset can be positive or negative but can t take the output below the zero gas level e g 4 mA for 4 20 mA Analog Output 2 Same as A1 01 but for output 2 see description above Source Analog Output 2 Type Same as A1 02 but for output 2 see description above Analog Output 2 Same as A1 03 but for output 2 see description above Scaling Analog Output 2 Offset Same as A1 04 but for output 2 see description above 34 P N 1100 1000 Version 0 MGS 550 Fixed Gas Detector 4 4 5 Modbus Configuration MB xx Parameter AEU Description MB 01 Modbus Node Address Set the RS 485 node address 001 to 255 NE NL 485 Baud Rate 0 9600 1 19200 MB 03 RS 485 Stop Bits ore ae ee A O eelle 0 O MB 04 RS 485 Parity Dana Modbus Slave Termination 0 Out 1 In 4 4 6 Display Mode P1 01 Parameter NEWS Description Display Mode Defines whether or not the gas name and concentration are displayed during normal operation 0 OFF gas name and concentration will not be shown 1 ON gas name and concentration will be shown If an alarm or fault condition occurs the display will be turned on to show the error code s 4 4 7 Buzzer Designation B1 xx Parameter AEU Description Buzzer Enable and Source Select alarm configuration 01 to 14 to activate Buzzer 00 Buzzer disabled Each MGS 550 has a built in buzzer which can be designated to any alarm configuration Ref
32. T RELAY 2C N NMOANALOG 2 GND ELAY 2 NG BELAY 2NCW AC ANALOG OUT n E 25 L tF ANALOG 1 GND ar E PWR GND 24VDC 4 Li P N 1100 1000 Version 0 49 MGS 550 Fixed Gas Detector 5 5 Sensor Maintenance Explosion Proof Housings 5 5 1 Components Overview This product uses semiconductors which can be damaged by electrostatic discharge ESD When handling the PCB care must be taken so that the electronics is not damaged CAUTION If the instrument has two sensors installed and both sensors modules or heads are to be replaced then replace and register them one at a time Failing to do so might cause a fault Observe the sensor type target gas measuring range and replace the sensor with the same type NOTICE If sensors are to be replaced with different types be sure to de register the sensor s first and then register them one at a time Refer to the following sections e 4 3 8 De register All Sensors and Reset Node Address F 08 on page 27 e 4 3 7 De register One Sensor F 07 on page 27 e 4 3 6 Register Sensor F 06 on page 26 Q0 Item Description Replacement Instructions See figure above See figure above See figure above 5 5 3 Replacing the Sensor Control Board on page 52 5 Sensor module sensor 5 5 2 Replacing the Sensor Module on page 51 plus PCB 6 pue spacer See oe above optional L3 Sensing head cap See figure above Entire Assy Local 5 5 4 Replacin
33. VDC or Volt 24 VAC 20 40044 Hours since last test sensor 1 Hours D05 40047 LN electronics 12V supply voltage x100 40048 Instrument electronics 6V supply voltage x100 40049 Instrument electronics 5 4V supply voltage x100 40050 Instrument electronics 3 3V supply voltage ii x100 40051 Instrument electronics temperature x100 I H H I 40052 Instrument electronics tact and magnetic switch state 9 3 3 Input Status Flags Input status flags are readable using function code 02 Description Range Ur CE IT 10008 to010 Reed P N 1100 1000 Version 0 69 MGS 550 Fixed Gas Detector Re Description Range 10018 10020 Resmed 0 g 10015 Sensor 2 Saturation Overflow 0 or 1 gas gt full scale 9 3 4 Output Status Flags Output status flags are readable using Modbus function code 01 and writable using function code 05 Description Reg 00001 Sensor 1 calibration expired This flag can be cleared by performing a calibration or by 0 or 1 need calibration resetting 00002 Sensor 2 calibration expired This flag can be cleared by performing a calibration or by 0 or 1 need calibration resetting 00003 Alarm Flag 0 or 1 alarm for any alarm TR NIE POUR not fault 00004 Writing zero clears any acknowledgeable or latched alarm This is the same behavior as holding the ENTER key for 5 seconds 00005 Relay closed test Setting this flag to zero closes all 3 relays
34. a Measuring Range Combustible Gasses Various 0 to 100 LEL including Ammonia SC Sensors Typical Example Gases Measuring Range Methane Natural gas Propane Butane 0 to 5 000 ppm H Iso Butane Ethylene SC Ethylene is 0 to 2 000 ppm Acetone Chloroform Ethanol Methanol MUS Methylene Chloride Ethylene Chloride a u 9 3 Modbus Registers If items span two registers e g 30024 and 30025 then the registers are long or float data types Otherwise the registers are integer data types or ASCII NOTICE If a sensor is not registered then reading from a Modbus register associated with that sensor will generate a Modbus exception NOTICE 64 P N 1100 1000 Version 0 MGS 550 Fixed Gas Detector 9 3 1 Analog Input Registers Analog input registers are read only and use Modbus function code 04 Read Input Register Units Param JJ D e Description Range 30001 16 bit Current Fault Code Instrument See 9 3 4 D 01 electronics Non Critical E300 Faults on page 42 30002 16 bit Last Fault Code Instrument electronics and 5 3 3 D 02 Critical Faults on page 41 30003 Software Version Instrument electronics 30004 Reserved 30010 30011 Sensor 1 Type Code OoOo ao 30012 S1 09 1 ppm 2 ppb Display units sensor 1 S1 10 3 Vol 4 LEL Full Scale in ppb ppm LEL or Vol Sensor 1 Note LEL and Vol sensors are 0 to 65535 Unit
35. always displayed as x 10 the actual value dependent For example a reading of 205 is 20 5 30014 Sensor 1 Gas Type Text Char 1 2 ASCII Text 30015 Sensor 1 Gas Type Text Char 3 4 ASCII Text S1 01 30016 Sensor 1 Gas Type Text Char 5 NULL ASCII Text LEL Vol Conversion Factor 10 Sensor 1 Unit This is the factor to convert the integer gas 0 to 65535 denari output level from LEL or Vol to ppm P 30018 Alarm Low Set Point Sensor 1 O to 100 Full scale S1 03 30019 Alarm Medium Set Point Sensor 1 O to 100 96 Full scale S1 04 30020 Alarm High Set Point Sensor 1 0 to 100 Full scale S1 05 Concentration ppb ppm LEL or Vol Sensor 1 Note LEL and Vol sensors are Unit always displayed as x 10 the actual value 0 to 65535 deere For example a reading of 205 is 20 5 p Units are in register 30012 30022 Concentration Sensor 1 0 to 100 Full Scale 30023 Sensor timer Sensor 1 0 to 65535 30024 ppm Hours Sensor 1 upper long integer ppm Hours 30025 ppm Hours Sensor 1 lower long integer Temperature Deg C Sensor 1 30026 4 Y Note Sensor PCB temp not gas temp oee 5 3 5 Sensor Faults D 07 on page 42 P N 1100 1000 Version 0 6 30013 51 11 30017 30021 30027 16 bit Fault Code Sensor 1 ul MGS 550 Fixed Gas Detector Description Range Units Param 30028 Sensor 1 Instrument electronics UID Char 1 2 0to9 atoz ASCII Text 30029 Sensor 1
36. ard Sensor Connector J2 Connector J1 Connector J3 LI j M ANALOG 2 GND ANALOG OUT 1 B ANALOG OUT 2 ANALOG 1 GND PWR GND 4 P N 1100 1000 Version 0 53 MGS 550 Fixed Gas Detector 5 5 5 Replacing the Remote Sensing Head Assembly oee illustration in section 5 5 1 Components Overview on page 50 Step Description Power down the instrument Loosen the set screw 1 5 mm hex key and unscrew lid from instrument Using a flat head screwdriver loosen the three screws and carefully pull out the bezel from the enclosure Unscrew old remote XP sensing head from conduit to facilitate removal of old sensing head assembly Feed the connector end of the new remote XP sensing head through the conduit Depending on the conduit that was used during installation you may need to partially disassemble the conduit Screw the sensor end of the XP sensing head assembly into remote end of the conduit Plug new sensing head connector into the socket on the interface board Place bezel back into the enclosure and secure with the three screws to the standoffs Sensor v Connector J2 Screw on lid until itis seated then tighten the set screw maintain Ex d rating The instrument will prompt to start the sensor registration e g rEg 1 Acknowledge with ENTER The instrument will then indicate successful registration e g PASS 1 SCREW LOCATIONS ELECTRONICS C
37. ay as fault relay e g configuration 13 CAUTION 32 P N 1100 1000 Version 0 MGS 550 Fixed Gas Detector 4 4 3 Alarm Configuration AF xx Parameter Name Description Alarm ON Delay Value 00 no delay 01 to 15 delay in minutes If an alarm ON delay is set the gas concentration has to be continuously above below for oxygen low and medium alarms the alarm threshold for the delay time before the alarm is triggered or activated Once programmed all alarms have the same ON delay NOTICE Alarm OFF Delay Value 00 no delay 01 to 15 delay in minutes If an alarm OFF delay is set the gas concentration has to be continuously below above for oxygen low and medium alarms the alarm threshold for the delay time before the alarm is deactivated If the alarm is acknowledgeable the alarm OFF delay will be terminated as soon as it is acknowledged Once programmed all alarms have the same OFF delay NOTICE Critical Fault Latch 0 non latching 1 latching Mode Latching means that any critical fault state will remain active even if the event creating the fault is cleared until the user manually clears the fault state with the ENTER key Alarm Acknowledge 00 no timeout 01 to 59 delay in minutes Timeout If an alarm state has been acknowledged but the condition still exists after the timeout period the alarm state will be triggered NOTICE X again P N 1100 1000 Version 0 33 MGS 550 Fixed Ga
38. cation environment and performing a target gas calibration is more accurate A surrogate gas calibration may only be performed as an alternative if a target gas calibration is not possible WARNING The sensor should be fully warmed up refer to section 4 1 1 Applying Power and the Start up Sequence on page 18 NOTICE 36 P N 1100 1000 Version 0 MGS 550 Fixed Gas Detector When entering the functions F 02 zero adjustment or F 03 span adjustment the instrument will automatically enter OFFLINE mode The instrument will remain OFFLINE until either the OFFLINE mode is canceled using function F 01 see section 4 3 1 Offline Mode F 01 on page 25 or the OFFLINE mode times out within 30 minutes after the NOTICE adjustment has ended This is to avoid false alarms caused by residual cal gas If the adjustment has not been completed the instrument will abort the zero or span adjustment after 5 minutes of the last of interaction No new data will be saved and the instrument remains OFFLINE 5 2 2 General Procedure e Ensure the instrument has been powered on for at least 1 hour prior to beginning the sensor adjustment procedure For semiconductor sensors you must wait at least 24 hours Attach the pressure regulator to the calibration gas cylinder Attach tubing to the pressure regulator Attach calibration adapter to the tubing For the general purpose type sensors see figure below connect the tubing to the calibration
39. chemically on the measuring electrode and a current flows through the sensor This current is proportional to the gas concentration At the same time oxygen from the ambient air reacts at the counter electrode electrochemically The current flowing through the sensor is amplified electronically digitized and corrected for several parameters e g the ambient temperature 7 2 Catalytic Bead Sensors A catalytic bead sensor measures the partial pressure of combustible gases and vapors in ambient air It uses the heat of combustion principle The monitored air diffuses through the sintered metal disc into the sensor The mixture of combustible gases vapors and air are catalytically combusted at a heated detector element called a pellistor The oxygen content in the air must be greater than 12 Vol Due to the resulting heat of combustion the temperature of the detector element rises This increase in temperature causes a change of resistance in the detector element which is proportional to the concentration of the mixture of combustible gases and vapors in the monitored air In addition to the catalytically active detector element there is a compensator element Both elements are parts of a Wheatstone bridge Thus environmental effects like changes in ambient temperature or humidity are almost entirely compensated Certain substances in the atmosphere to be monitored may impair the sensitivity of the sensors Such substances include but are not
40. cseeeccecsceseeceeseceeneeensccsseeeenscouseeeeesccsseeeesscoseeeeesees 5 1 3 Safe Connection of Electrical Devices nennen nnne 5 SECTION 2 DESCRIPTION 6 zii PIOGUGLCOVSNIEeW c 6 22 KOV Produc FedlUl Sacile cai 7 2 3 General PUIpose Oploli sorli ieri 8 24 Explosion ProofOpliohasseitlil biella 9 2 5 ONS Oro VES aaa leali 10 SECTION 3 INSTALLA MON 11 31 General Information Tor InstallallOlik ara aaa 11 32 AStalalon nici Mem Em mM 11 3 0 Mechanical Astalldllobcus sus cvibetesuph iaia 12 Sd SEICCWICAI INS AN o REPRE EIE m TT 12 JE Preparal lS sarsicce 12 04 2 APOWEP GING Signal WY IMIG cado tuit lalla aida lil 14 er oM S Ade TIL TENE NS 15 3 4 4 Installation of Remote Sensing Head ii 16 3 4 5 Connecting One or More MGS 550s to a Bacharach Controller 17 SAG Modbus RTU Intel de oou oe e Pasto desi eil ada 17 S MEE Celer E T NM TRE 17 SECTION 4 OPERATION lalla 18 4 1 Overview of Normal ODerallOnlssisei ie cese eoi laica 18 4 1 1 Applying Power and the Start up Sequence e eee e tere eee eeeeeeeeeeeeaaaeeeeeeees 18 4 12 Venyrng Analog SIGN alSuiiinuind sia a a iad 19 4 1 3 Verifying the Digital Modbus Signal i 19 ANA Te5 DiugitbDisplay angd LEDS icto vec habue nt nina cubat o dem enean avs 19 di NS 21 AZ General Navigation rela RS 21 4 2 2 Checking Status and C
41. curs then call service 0200 RS485 checksum fault Checksum error in received packet Power cycle If it re occurs then call service 0400 Modbus fault Packet timeout Modbus message Power cycle If it re truncated or timed out early occurs then call service 0800 Temperature sensor fault Temperature sensor disconnected Check connection to or no valid reading sensor PCB 1000 Temperature out of range Temperature out of range Confirm that sensing fault head is operating within specifications 2000 Analog front end EC analog front end failure Replace sensor module communications fault 4000 Negative gas Sensor has drifted too negative Perform zero and span concentration fault calibration 8000 Sensor configuration fault General error in sensor Replace sensor module configuration P N 1100 1000 Version 0 43 MGS 550 Fixed Gas Detector 5 4 Sensor Maintenance General Purpose Housings 5 4 1 Components Overview This product uses semiconductors which can be damaged by electrostatic discharge ESD When handling the PCB care must be taken so that the electronics is not damaged CAUTION If the instrument has two sensors installed and both sensors modules or heads should be replaced then replace and register them one at a time Failing to do so might cause a fault Observe the sensor type target gas measuring range and replace the sensor with the same type NOTICE If sensors should be replaced with different types
42. dent are always displayed as x 10 the actual value For example a reading of 205 is 20 5 40014 Sensor 1 Low Alarm Behavior 40015 Sensor 1 Medium Behavior 40016 Sensor 1 High Behavior 40017 Sensor 2 Low Alarm ppb ppm LEL or 0 to sensor full Unit Vol Note LEL and Vol sensors scale dependent are always displayed as x 10 the actual value For example a reading of 205 is 20 5 Sensor 2 Med Alarm ppb pom LEL or 0 to sensor full Unit Vol Note LEL and Vol sensors scale dependent are always displayed as x 10 the actual value For example a reading of 205 is 20 5 51 03 40012 51 04 40013 51 05 51 06 91 07 51 08 52 03 J 40018 52 04 P N 1100 1000 Version 0 MGS 550 Fixed Gas Detector Menu 52 05 Description Unit dependent 0 to sensor full scale 40019 Sensor 2 High Alarm ppb ppm LEL or Vol Note LEL and Vol sensors are always displayed as x 10 the actual value For example a reading of 205 is 20 5 40020 Sensor 2 Low Alarm Behavior pr 40021 Sensor 2 Medium Behavior DENN 40022 Sensor 2 High Behavior 40023 Analog Output 1 Source 1 Sensor 1 2 Sensor 2 40024 0 0to5 V S2 06 S2 07 S2 08 A1 01 A1 02 Analog Output 1 Type 1 1to5V 2 0t0 10V 3 2t0 10V 4 4 to 20 mA 40025 Analog Output 1 Scaling 20 to 100 of full scale 40026 Analog Output 1 Offset
43. description of the defect as you perceive it You will be contacted with a cost estimate for expected repairs prior to the performance of any service work For liability reasons Bacharach has a policy of performing all needed repairs to restore the instrument to full operating condition Prior to shipping equipment to Bacharach contact our office for an RMA returned merchandise authorization All returned goods must be accompanied with an RMA number Pack the equipment well in its original packing if possible as Bacharach cannot be held responsible for any damage incurred during shipping to our facility 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 2 P N 1100 1000 Version 0 MGS 550 Fixed Gas Detector TABLE OF CONTENTS SECTION 1 SAFEM idilliaca MI LM MEE 5 lel DEeMNMon ofAlertC0i SL arcella t 5 1 2 General Safety Statements ccccccccseeeccesc
44. e EU Directive 2012 19 EU and in national laws have been effective since August 2012 and apply to this device Common household appliances can be disposed of using special collecting and recycling facilities However this device has not been registered for household usage Therefore it must not be disposed of through these channels The device can be returned to your national Bacharach Sales Organization for disposal Please do not hesitate to contact Bacharach if you have any further questions on this issue 8 2 Disposing of Electrochemical Sensors Dispose of sensors in accordance with local laws EXPLOSION DANGER Do not dispose of sensors in fire due to the risk of explosion and resulting chemical burns WARNING Do not force open electrochemical sensors WARNING Observe the applicable local waste disposal regulations For information consult your local environmental agency local government offices or appropriate waste disposal companies WARNING P N 1100 1000 Version 0 61 MGS 550 Fixed Gas Detector SECTION 9 TECHNICAL DATA 9 1 General Specifications Category Specifications Signals to Analog Current Normal Operation uncino siii 4 to 20 mA Ee BifiiWo io1r4 oce 3 8 mA Measuring range exceeded 20 5 mA Instrumentiauli soasdogaldle lalla lt 1 2 mA Fault on analog interface gt 21 mA Offline mode Maintenance signal 3 mA
45. e error A possible hardware problem may exist Contact fault the factory 8000 Can t read EEPROM P N 1100 1000 Version 0 41 MGS 550 Fixed Gas Detector 5 3 4 Non Critical E300 Faults Non critical faults are indicated by E 300 on the display Non critical faults indicate issues such as environmental conditions being outside of specification an installation error has occurred wrong wiring for example and so on The gas detector will continue to monitor but may produce less accurate readings and may not respond correctly to gas alarm events A non critical fault might not need immediate attention but should be mitigated at the next scheduled maintenance at the latest See D 01 and D 02 Non Critical Code Fault 0001 Reported temperature outside operating range 0002 Master receiver buffer full 0004 Slave receiver buffer full 0008 Checksum CRC error in received packet 0010 Checksum CRO error in received packet 0020 Packet timeout 0040 Either current loop open 5 3 5 Sensor Faults NOTICE Possible Causes Instrument temperature is outside specification RS 485 Message too long for receiver buffer Transmission is corrupted computed checksum doesn t match transmitted checksum Modbus message was truncated or timed out early Possible wiring connection and or termination issue exists Analog output is set to 4 to 20 mA and loop is open Verify that ambient ai
46. e signal transmission configurations o Analog 1 sensor 2 wire o Analog2 sensors 3 wire or 4 wire o Digital Modbus communications 2 wire plus ground Menu navigation options o Internal buttons to use if the cover is removed o Non 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 O O O P N 1100 1000 Version 0 7 MGS 550 Fixed Gas Detector 2 3 General Purpose Option ENCLOSURE LID e BEZEL ABOVE AND PROCESSOR T BOARD BELOW V 5 L RIBBON CABLE INTERFACE BOARD ENCLOSURE BOTTOM p SENSING HEAD 1 REMOTE 1 LOCAL SENSOR 1 REMOTE MGS 550 1 LOCAL 2 REMOTE 2 LOCAL SENSOR SENSORS SENSORS MGS 9550 8 P N 1100 1000 Version 0 MGS 550 Fixed Gas Detector 2 4 Explosion Proof Option ENCLOSURE LID HEX SET SCREW Do BEZEL ABOVE AND PROCESSOR BOARD BELOW INTERFACE RIBBON CABLE BOARD A ENCLOSURE BOTTOM SENSING HEAD 1 REMOTE 1 LOCAL SENSOR REMOTE 1 LOCAL 2 REMOTE 2 LOCAL SENSOR SENSORS SENSORS P N 1100 1000 Version 0 e Lai MGS 550 Fixed Gas Detector 2 5 Sensor Styles For Explosion Proof XP Enclosure For General Purpose GP Enclosure JOSUSS B20 JOSUSS 210WISY Y 94 ui G P N 1100 1000 Version 0 10 MGS 550 Fixed Gas Detector SECTION 3 INSTALLATION 3 1 Ge
47. el NY Alarm off Level O N Med Hysteresis Alarm Alarm On Level A Time 30 P N 1100 1000 Version 0 MGS 550 Fixed Gas Detector Alarm hierarchy exists An A2 alarm overrides an A1 alarm on the display However the A1 and A2 states operate independently An example follows e Ai is acknowledgeable e A2is not acknowledgeable e The gas concentration is such that it triggers A1 and A2 Acknowledging will cause the A1 relay to release However the display will still show an A2 alarm as long as the A2 condition continues to exist The same is true for A3 and A2 Gas Concentration Med Alarm Not Acknowledgeable NOTICE Low Alarm Acknowledgeable Med Alarm State Note If timeout expires before reading drops below low alarm level minus hysteresis alarm will re activate Low Alarm State Timeout Alarm Acknowledged Latching and acknowledgment settings of alarms may be combined to create unique scenarios e Latching means that once the alarm level is reached the instrument will trigger the alarm and it will remain in alarm status even if the gas concentration subsequently does not meet the alarm condition any more To clear a latching alarm it has to be acknowledged by tapping and holding ENTER for more than 3 seconds e Non latching means that the alarm status clears if the gas concentration does not meet the alarm condition anymore e Acknowledgeable means that t
48. ent s display one relay should be designated for instrument faults and an alarm device should be connected to the fault relay NOTICE P N 1100 1000 Version 0 15 MGS 550 Fixed Gas Detector 3 4 4 Installation of Remote Sensing Head e Remove a blind plug from the enclosure if applicable e Feed the connector of the sensor see below left through a cable gland or conduit if applicable through the opening of the enclosure and then into the enclosure e Secure the cable gland with attached gasket or appropriate conduit into the housing in order to maintain IP or Ex d rating e Plug the sensor connector into the socket until the lock engages For a new instrument with no sensor connected it does not matter which socket is used first However if a sensor is already connected then it should be left plugged into its socket e ftwo remote sensors are to be installed register only one sensor at a time Refer to section 4 3 6 Register Sensor F 06 on page 26 Sensor Microprocessor Board Sensor Connector J2 Connector J1 Connector J3 Standoff Hole Pin 10 Ww Pin 9 4 d Relay Wiring ANALOG OUT 2 Power and Signal Wiring Terminal Block T2 mir Terminal Block T1 RELAY 2 NAM RELAY 3 NCU mie percio Pin 18 r A Pin 1 Standoff Hole Standoff Hole Buzzer A sensor is automatically recognized and registered by the instrument after a power o cycle Alternatively function F 06 can be used to register a se
49. er to section 4 4 2 Relay Designation RX xx on page 32 for a list of alarm configurations P N 1100 1000 Version 0 35 MGS 550 Fixed Gas Detector SECTION 5 MAINTENANCE 5 1 Maintenance Intervals Check calibration During Check signal transmission to the central controller Check LEDs for proper operation Check for proper triggering of alarm devices Calibrate the sensor or contact Bacharach for sensor exchange with factory calibrated sensor As Required Replace sensor s See section 5 4 Sensor Maintenance on page 44 Maintenance intervals must be established for each individual installation Depending on safety considerations application specific conditions and local regulations the 6 month maintenance intervals might need to be shortened 5 2 Making Adjustments to Sensors 5 2 1 Introduction Adjustment of the instrument must be performed at regular intervals as detailed above Breathing Hazard Calibration gas must not be inhaled See appropriate Material Safety Data Sheets Calibration gas should be vented into a fume hood or to the outside of the building WARNING Zero First Then Span For proper operation never adjust the span before completing a zero adjustment Performing these operations out of order will cause faulty calibration WARNING Bacharach recommends calibrating instruments within the application specific condition and with target gas This method of zeroing the instrument in the appli
50. g the Local Sensing Head Assembly on page 53 Entire Assy Remote 5 5 5 Replacing the Remote Sensing Head Assembly on page 54 50 P N 1100 1000 Version 0 MGS 550 Fixed Gas Detector 5 5 2 Replacing the Sensor Module See illustration in section 5 5 1 Components Overview on page 50 2 Loosen the set screw see photos to right in the sensing head cap item 8 using a 1 5 mm hex wrench Unscrew the sensing head cap item 8 and remove Description Pull out sensor module item 5 from sensor control board item 4 With flat edges of PCBs aligned plug new sensor module into sensor control board Screw on the sensing head cap to the sensing head base hand tight 7 Tighten the set screw in the sensing head cap Power up the instrument Verify calibration lp Du Ro Fi A IN AC te ha 5 Zar 15 C a 14219691 Cao g47 49 P N 1100 1000 Version 0 51 MGS 550 Fixed Gas Detector 5 5 3 Replacing the Sensor Control Board See illustration in section 5 5 1 Components Overview on page 50 Description Power down the instrument 2 Loosen the set screw see photos to right in the sensing head cap item 8 using a 1 5 mm hex wrench Unscrew the sensing head cap item 8 and remove Pull out sensor and PCB stack items 4 and 5 from the sensing head base Remove sensor control board item 4 from sensor module item 5 With flat edges of PCBs aligned plug
51. gas flow and remove the calibration adapter from the sensor or disconnect the tubing Ensure that the concentration is below the alarm thresholds For oxygen ensure that the concentration is below the enrichment alarm thresholds Tap ENTER to exit the function 5 2 5 System Bump Test A system bump test is a live test of a system to verify that the instrument responds to gas and that all connected alarm devices controllers etc are operating appropriately In this case be sure to inform all involved persons about the test and that certain alarms might have to be inhibited e g process shutdown notification of authorities etc e Apply target gas if required a sufficiently high concentration low concentration for oxygen displacement to trigger alarms e The display will show the current gas concentration value 38 P N 1100 1000 Version 0 MGS 550 Fixed Gas Detector e Once the alarm thresholds are exceeded verify that all designated gas alarm relays are activated and the analog and digital outputs properly transmitted the corresponding gas concentrations e Turn off gas flow and remove the calibration adapter from the sensor or disconnect the tubing 5 3 Troubleshooting 5 3 1 Hexadecimal Format All fault codes are shown in hexadecimal hex format A hex digit can represent multiple codes as shown below Hex Equivalent Hex Equivalent Hex Equivalent Hex Equivalent Code Error Code s Code Error Code s Code Error C
52. h Mode Alarm Acknowledge Timeout Analog Output Source Analog Output Type Analog Output Scaling Analog Output Offset Modbus Node Address RS 485 Baud Rate RS 485 Stop Bits RS 485 Parity Modbus Slave Termination Display Mode Buzzer Enable and Source Current Fault Code Last Fault Code Reserved Supply Voltage Days Since Last Span 1 Days Since Last Span 2 Sensor 1 Current Fault Sensor 1 Last Fault Sensor 2 Current Fault Sensor 2 Last Fault 24 P N 1100 1000 Version 0 MGS 550 Fixed Gas Detector 4 3 Functions 4 3 1 Offline Mode F 01 In OFFLINE mode the instrument does not respond to alarm conditions but allows the execution of functions and the setting of parameters OFFLINE mode is useful in eliminating false alarms while performing maintenance e To enter OFFLINE mode change F 01 to 01 e To cancel OFFLINE mode change F 01 to 00 or tap and hold ENTER for more than 3 seconds from the top level menu OFFLINE mode automatically times out 30 minutes after returning to normal operation i e after exiting the function menu NOTICE Item Behavior in OFFLINE Mode Green LED On Displa Displays oFFLn or function and parameter numbers or user interaction in pay place of the gas level when applicable 4 to 20 mA Changes to 3 mA 0 to 5 V Stays at last valid value Analog Output 0 to 10 V otays at last valid value 1to5V OV 2to 10V 0 V Offline flag Modbus register 10024 is active must be m
53. hanging Parameter Values ii 22 4 23 SEXING Menaio 22 4 24 MenU OVveniei lella leali 23 AS MEME Uinc E 25 43d Offline Mode FOL zitiert ertet Set donc tatit a o tees Met Pone dian a 25 4 3 2 Zero Adjustment F 02 iiec tiet espe tton it e tib boe etude ee tape sn Ex Ren one euet d Rex ies 25 43 9 OpanAdgjustmernt F O9 issu co ee esee detur Deoa licia 25 4 3 4 Instrument Test F O4 aoo lara 25 4 3 5 Parameter Menu Fs05 deo uc t dere ai e Gerne EH nte sae Schau Cu ted Ro Fare pine a d NORD Rc 26 4 3 5 edisler Sensor P D6 iissa n tie Eoitaci uetus Dulcis iiie tutari NR 26 4 3 7 De register One Sensor F 07 ii 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 ssse 28 4 3 10 Reset System to Factory Default Setting F 10 seeeeeeeeeeessssses 28 4 4 EN Illic CR NE t omm 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 sees nnne nnne nnnm nnn 32 4 4 3 Alarm Configuration AF XX ee 33 4 4 4 Analog Output Configuration AX XX esses 34 4 4 5 Modbus Configuration MB XX nennen nnne nnne nnn nnn nnns 35 AAG Display Mode TP 1591 cocto e aene aatia eie baden enn Ea ed eddiluseties 35 4 4 7 Buzzer Designation BI al 35 SECTION 5
54. he alarm relay can be reset before the alarm condition clears e Not acknowledgeable means that the alarm relay cannot be reset until the alarm condition clears Latching Acknowledgeable Explanation The alarm state will reset automatically when the alarm condition clears The alarm state No No cannot be reset manually before the alarm condition clears NOTICE The alarm state will reset automatically when No Yes the alarm condition clears or can be reset manually The alarm state must be reset manually The Yes No alarm state cannot be reset before the alarm condition clears The alarm state must be reset manually and can Yes Yes be reset before the alarm condition clears Latching and acknowledgment does not just affect relay states but also the buzzer state and Modbus status flags P N 1100 1000 Version 0 31 MGS 550 Fixed Gas Detector 4 4 2 Relay Designation RX xx Parameter Name Description RI 01 Relay 1 Contact Behavior Select behavior for Relay 1 0 NO 1 Failsafe Relay 1 Source Select alarm configuration 01 to 14 to activate Relay 1 01 Sensor 1 Low Alarm 02 Sensor 1 Medium Alarm 03 Sensor 1 High Alarm 04 Sensor 1 Fault 05 Sensor 2 Low Alarm 06 Sensor 2 Medium Alarm 07 Sensor 2 High Alarm 08 Sensor 2 Fault 09 Instrument Electronics Critical Fault 10 Any Low Alarm 11 Any Medium Alarm 12 Any High Alarm 13 Any Sensor Fault or Instrument Electronics Cr
55. igned as sources NOTICE e Open the enclosure lid For the general purpose GP enclosure loosen the four screws using an M5 hex key and remove the lid from the base For the explosion proof XP enclosure loosen the hex set screw 1 5 mm hex key and unscrew the lid from the instrument base HEX SCREW HEX SCREW e To access the Interface Board use a flat head screwdriver to loosen the three captive screws on the Processor Board Access the captive screws through holes in the Display Bezel Carefully pull out the bezel and Processor Board as a single unit from the enclosure Note that a ribbon cable connects the Processor Board to the Interface Board 12 P N 1100 1000 Version 0 MGS 550 Fixed Gas Detector SCREW LOCATIONS Internal Display Bezel Top Layer Processor Middle Layer iddle Layer with Kee Ribbon Cable BEZEL IF KW Interface Board l RC Bottom Layer ELECTRONICS CIRCUIT BOARD BENEATH BEZEL SHOWING RIBBON CABLE TO INTERFACE BOARD P N 1100 1000 Version 0 13 MGS 550 Fixed Gas Detector 3 4 2 Power and Signal Wiring e Using appropriate cable glands and or conduit connect the wires for power and signal to the appropriate terminal as indicated in the figure and wiring table that follow e Polarity must not be reversed e For 24 VAC installations in a daisy chain configuration the neutral polarity must be maintained for all instruments e Fasten terminal screws
56. ion In normal operation tapping pressing and holding the ENTER key for more than 3 seconds will cancel the OFFLINE mode or release any latched alarm or acknowledge any acknowledgeable alarm with priority given to OFFLINE mode The instrument is designed for the magnetic wand to be used with the enclosure lid in place If the enclosure lid is not in place the magnetic wand may activate two or more keys at once due to cross talk NOTICE After 3 minutes of inactivity within a menu the instrument times out and returns to normal operation When changing a parameter 3 minutes of inactivity will cause the instrument to time out NOTICE X andreturn to normal operation without accepting any changes 4 2 2 Checking Status and Changing Parameter Values Select the menu item to be accessed by tapping UP DOWN e When the desired menu item is displayed tap ENTER The current value or status will flash to indicate the user interface has switched to data entry mode e UP DOWN adjust the value of a numerical parameter or scroll through preset choices e Once the display shows the intended value or choice tap ENTER to validate the new parameter and return to the previous menu 4 2 3 Exiting the Menu To get back into measurement mode tap and hold the i key for more than 3 seconds This will step back through the menus and eventually return to normal operation 22 P N 1100 1000 Version 0 MGS 550 Fixed Gas Detect
57. ioni ia oor dea Eater trata 70 SECTION 10 ORDERING INFORMATION eeecce e eeeeeee eene nne enhn nna n unns nana saa a sane sensn nnns 72 10 1 MGS SS0iINSIFUMOe II OMY eateries oo bs ille 72 10 2 MGS 550 Gas Detector IP66 with IP66 Sensor ou cece cee ese eseeseeeeeeeeeeeeeueeaeeeeeeeeeaesees 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 iii 76 10 6 MGS 550 Replacement Parts and Accessories eene 78 SECTION 11 DECLARATION OF CONFORMITY rire 79 4 P N 1100 1000 Version 0 MGS 550 Fixed Gas Detector 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 Description Indicates an imminently hazardous situation which if not avoided will result in death or serious injury Indicates a potentially hazardous situation which if not avoided could WARNING uy result in death or serious injury Indicates a potentially hazardous situation which if not avoided could CAUTION 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 ho
58. itical Fault 14 Any Alarm or Sensor Fault or Instrument Electronics Critical Fault R2 01 Relay 2 Contact Behavior Select behavior for Relay 2 0 NO 1 Failsafe Relay 2 Source select alarm configuration 01 to 14 to activate Relay 2 See R1 02 above for source codes R3 01 Relay 3 Contact Behavior Select behavior for Relay 3 0 NO 1 Failsafe Relay 3 Source Select alarm configuration 01 to 14 to activate Relay 3 See R1 02 above for source codes The relays can be independently designated to any configuration below For example consider a 2 sensor system with relays configured as follows e H1 02 01 Relay 1 configured as 01 Sensor 1 Low Alarm e R2 02 06 Relay 2 configured as 06 Sensor 2 Medium Alarm e R3 02 13 Relay 3 configured as 13 Any Sensor Fault or Instrument Electronics Critical Fault In this configuration the following would occur e Relay 1 will activate when the low alarm of sensor 1 is triggered e Relay 2 will activate when the medium alarm of sensor 2 is triggered e Relay 3 will activate when any sensor or instrument fault occurs either sensor It is possible to dedicate the same alarm configuration to multiple relays For example sensor 1 high alarm could be mapped to relay 1 and relay 2 for redundancy With integrated relays the instrument can be operated stand alone without a central controller with additional local alarm signaling It is recommended to designate one rel
59. ll be displayed See section 5 3 Troubleshooting on page 39 for additional information The diagnostics attributes can be accessed directly during normal operation by tapping and holding UP for more than 3 seconds NOTICE 4 3 10 Reset System to Factory Default Setting F 10 This function will restore factory default values of all application specific parameter settings See section 6 Factory Default Settings on page 57 for a list Resetting the system to its factory default values will not reset sensor calibrations NOTICE Function F 10 resets a parameters except sensor registration information to their factory default values see Factory Default Settings on page 57 Before executing this function consider recording all parameter settings in case you wish to reset one or more of them to their former values NOTICE Tap ENTER to initiate this function A SURE confirmation prompt is given Tap ENTER to confirm the reset All LED segments will light up for 3 seconds Parameter settings will change to factory default values The internal buzzer will sound for 3 seconds After another 3 seconds the instrument will return to the main menu After an F 10 system reset the instrument will be in a known state and the parameters can be set 28 P N 1100 1000 Version 0 MGS 550 Fixed Gas Detector 4 4 Parameters 4 4 4 Sensor 1 Settings S1 xx and Sensor 2 Settings S2 xx if Connected S1 amp S2 Para
60. losure general purpose or GP housing e 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 Danger of explosions This product is neither certified nor approved to be operated in oxygen enriched atmospheres WARNING A The device is not intended to be used in areas classified as hazardous WARNING 6 P N 1100 1000 Version 0 MGS 550 Fixed Gas Detector Key Product Features Enclosure options o General purpose GP ABS plastic housing rectangular o Explosion proof XP Aluminum housing round Power options refer to section 9 1 General Specifications on page 62 o 24VAC o 19 5to 28 5 VDC Multi function 5 digit LED display o gas concentrations o status messages o menu choices Diagnostic status LEDs 3 Configurable output signal based on measured gas concentration o Analog output 4 to 20 mA Analog output 0 to 5 V Analog output 0 to 10 V Analog output 1 to 5 V Analog output 2 to 10 V o Digital output Modbus RTU signal Independently configurable analog outputs 2 Redundant sensor mapping option one sensor can be mapped to both analog outputs Multi wir
61. m Name n 1 or 2 Description n 1 or 2 81 01 S201 Sensor n Gas Name Abbreviated Gas Name 91 02 92 02 Sensor n UID Unique 5 digit sensor ID serial number Sensor n Low Alarm Value above which a low alarm condition occurs ppb ppm LEL Vol Low alarm value must be less than the medium and high alarm values Sn 03 Sn 04 lt Sn 05 See oxygen sensor notice below This parameter has a fixed minimum limit that is sensor specific and not editable Sensor n Medium Alarm Value above which a medium alarm condition ppb ppm LEL Vol occurs Medium alarm value must be between low and high alarm values Sn 03 lt Sn 04 lt Sn 05 See oxygen sensor notice below Sensor n High Alarm Value above which a high alarm condition occurs ppb ppm LEL Vol High alarm value must be greater than low and medium alarm values Sn 03 lt Sn 04 lt Sn 05 See oxygen sensor notice below bil haa NN Ei Behavior 1 Non latching not acknowledgeable 2 Non latching acknowledgeable Behavior 3 Latching not acknowledgeable ae a 4 Latching acknowledgeable Behavior 1 09 S2 09 Sensor n Type Code 4 digit sensor code read only Sensor n Units Read Only Sensor n measurement units 1 ppm 2 ppb 3 Vol 4 LEL Sensor n Full Scale Read Only Sensor n full scale units ppb or ppm or Vol or LEL Sensor n Test Flag When set to 1 this flag indicates that a calibration is recommended This flag can be
62. m registration of sensor 1 or registration of sensor 2 For more information refer to section 4 3 6 Register Sensor F 06 on page 26 This message is shown after successful completion of a functional operation of one of the sensors for example after registering a sensor after calibrating a sensor etc This is a confirmation display prior to de registering all sensors and resetting node addresses F 08 Tap ENTER to confirm reset See section 4 3 8 De register All Sensors and Reset Node Address F 08 on page 27 for additional information This is a second confirmation display prior to de registering all sensors and resetting node addresses F 08 Tap ENTER to confirm reset oee section 4 3 8 De register All Sensors and Reset Node Address F 08 on page 27 for additional information 20 P N 1100 1000 Version 0 MGS 550 Fixed Gas Detector The unit of measurement is indicated by two green LEDs on the right side upper LED for ppm lower LED for LEL both LEDs off for Vol The green LED on the left indicates that the instrument is in normal operation pi L o LEE 7 MAGNETIC ADJUSTMENT POINTS MGS 550 oO 6 MBS 55l FEEEE A Vege MEGNETIC ATLIUSTENT PORTS E e If two sensors are installed for the same gas but have different measuring ranges the unique sensor identifier or UID see label on the sensor will be displayed in addition to the gas name NOTICE Depending o
63. mbol If a fault has been detected the display toggles between gas name and Exxx and the green power LED is off E100 indicates a critical fault and E300 indicates a non critical fault A non critical fault does not need immediate attention but should be mitigated at the next scheduled maintenance see section 5 Maintenance on page 36 If a relay has been designated to the critical fault it is asserted E400 is a configuration warning that happens after a second sensor is added to warn the user that the sensor is not driving any relays or analog outputs When the first alarm has been triggered the display will toggle between gas name A1 and current gas concentration If a relay has been designated to the first alarm it is asserted When the second alarm has been triggered the display will toggle between gas name A2 and current gas concentration If a relay has been designated to the second alarm it is asserted When the third alarm has been triggered the display will toggle between gas name A3 and current gas concentration If a relay has been designated to the third alarm it is asserted The instrument is offline See section 4 3 1 Offline Mode F 01 on page 25 The first character represents an M This is found in the Modbus parameters MB xx Refer to section 4 4 5 Modbus Configuration MB XX on page 35 This is a confirmation that is displayed before a sensor is registered Tap ENTER to confir
64. mm hex key and unscrew lid from instrument Using a flat head screwdriver loosen the three screws and carefully pull out the bezel and Processor Board as one unit from the enclosure Unplug ribbon cable from Interface Board Internal Display Bezel 5 Label all connected wires then Top Layer disconnect all interface board wiring Biocacsor Board Using a Philip s head screwdriver loosen D Middle Layer the screws that hold the Interface Board in a 3 Rien ee ala place For the XP enclosure you must loosen the standoffs to remove the ap 2 Aw Interface Board Remove the Interface SIF gt di Board from the enclosure Z p Interface Board 7 Replace the old Interface Board with the 2 a Bottom Layer new one Secure the Interface Board to the enclosure by reversing the previous removal procedure With the Interface Board in place and the standoffs secured re attach the wiring using the labels from the earlier step 10 Place bezel and Processor Board back into the enclosure and secure with the three screws to the standoffs 11 Replace the housing lid maintain IP or Ex d rating e For general purpose GP enclosure tighten the four screws of the lid using an M5 hex key e For the explosion proof XP enclosure screw on the lid until it is seated then tighten the set screw 1 5 mm hex key Power up the instrument and verify proper operation 5 8 Cleaning the Instrument Clean the instrument
65. n the sensor and measuring range the gas concentration may or may not be shown with a decimal point NOTICE 4 2 Menus 4 2 1 General Navigation The MGS 550 offers two methods of navigating through the menu e Use the non intrusive magnetic wand tapping above the magnetic icons with dashes e Use the internal push buttons pressing the push button points MGS 550 E e ce E 2 O m J i in went ASUNT PUN T TI PINIS mW P N 1100 1000 Version 0 21 MGS 550 Fixed Gas Detector es Switch Points Internal Push Button Points Tapping pressing and holding the i key for more than 3 seconds gives access to the user menu which displays the firmware version first It is also used to return to the next higher menu item without saving any changes escape A short tap press lt 3 seconds of the i key also brings up a sensor identification on the display toggling between the serial number UID of Sensor 1 and Sensor 2 Tapping pressing the magnetic wand over the UP DOWN keys scrolls through the menu selections Function s Holding the magnetic wand at the key is interpreted as repeat tapping with an eventual acceleration When the last menu item is reached the menu will roll over to the first menu item in the list A diagnostic scan can be entered from normal operation by tapping and holding UP for more than 3 seconds Tapping pressing the ENTER key confirms a select
66. name and a value of 0 for the sensor in warm up See section 4 4 6 Display Mode P1 01 on page 35 LLL LI The instrument output will be OFFLINE see section 4 3 1 Offline Mode F 01 on page 25 If two sensors are installed both target gas names and 0 s will be toggled sequentially k f il 3 l l III Il Lr y i rs i3 San cum Note that sensor warm up times may be different for dual sensor configurations The power LED will continue to blink as long as at least one sensor is in warm up NOTICE oo yro MGS 550 va Power LED O ny SoLELLED q MAGNETIC ADJUSTMENT PONTE 18 P N 1100 1000 Version 0 MGS 550 Fixed Gas Detector After the warm up period the instrument begins normal operation The display toggles between the current gas concentration and target gas name cL U I L LIL NATE During normal operation the left green LED is lit solid Depending on the unit of measurement the green LED for ppm or LEL is lit If both of these LED are off the unit of measurement is Vol All configurations must be checked at least initially and the calibration must be checked initially and as needed koniu Pawar Start Up Normal PPY Sequence Operation Initialization Locate Functions View Display Start Warm up Locate Parameters Check for Alerts Power LED Blinks Check Values Adjust as Needed Gas Names Displayed Verify Configurations Zero Gas Level During Warm
67. neral Information for Installation Every detail of installation site selection is critical to ensure overall system performance and effectiveness Strict compliance and considerable thought must be given to every detail of the installation process including but not limited to the following e Regulations as well as local state and national codes that govern the installation of gas monitoring equipment Electrical codes that govern the routing and connection of electrical power and signal cables to gas monitoring equipment The full range of environmental conditions to which the instruments will be exposed The physical characteristics of the gas or vapor to be detected The specifics of the application e g possible leaks air movement draft etc The degree of accessibility required for maintenance purposes The types of optional equipment and accessories that will be used with the system Any limiting factors or regulations that would affect system performance or installations Wiring details including the following o The general purpose enclosure provides four M20 x 1 5 mm openings which can be used for field wiring direct attachment of a sensor or wiring of a remote sensor o The explosion proof enclosure provides four M20 x 1 5 mm openings which can be used for field wiring direct attachment of a sensor or wiring of a remote sensor o Unused openings must be closed with a suitable plug and gasket maintaining the IP or Ex d ra
68. nitrogen see section 5 2 2 General Procedure on page 37 and tap ENTER The display will show the current value blinking e g 2 The gas value may go negative This is normal e Wait for the current gas concentration value to stabilize e ap ENTER to save the calibration data e heinstrument will indicate success status with a PASS display Otherwise a FAIL message is displayed Turn off gas flow and remove the calibration adapter from the sensor or disconnect the tubing For oxygen ensure that the concentration is above the displacement alarm thresholds Tap ENTER to exit the function 5 2 4 Span Adjustment Enter the menu and select function F 03 Span Sensor Use UP DOWN to select the sensor to be calibrated then tap ENTER The last span gas concentration will be displayed Use UP DOWN to change the value to match the concentration of the calibration gas in the units of the sensor i e ppm Vol 96 VeL EL etc and tap ENTER Apply span gas see section 5 2 2 General Procedure on page 37 and tap ENTER e The display will show the current gas concentration value blinking in the units of the sensor i e ppm Vol 96 9eL EL etc e g 100 e Wait for the current gas concentration value to stabilize e ap ENTER to perform the calibration adjustment The instrument will indicate success status with a PASS display Otherwise a FAIL message is displayed Turn off
69. nsor Control Board i 52 5 5 4 Replacing the Local Sensing Head ASSEMDI cccceceeeeceeeceeeeeeeeeeeeeeeeeeeaeeeeeees 53 5 5 5 Replacing the Remote Sensing Head Assembly 54 5 6 Replacing the Instrument Electronics lessen 55 5 7 Replacing the Interface Board misereri indo tel beide vut in re laedat ba e duo Vale a ike Paus twers 56 5 9 Cleaning Ihe Instruments ita 56 SECTION 6 FACTORY DEFAULT SETTINGS 5 nian uue cuo o ee iii 57 SECTION 7 SENSOR PRINCIPLE 2 52 12 domui vE Ob acca Gut doe oc qium eve mU bimba dope c ons tta eco c 59 TN Electrochemical SersolS 42 99 lello oa ie 59 LA Qalalytic Bead SerSOls selle 59 7 3 Semiconductor Sensors iii 59 7 4 Infrared Sensors edere riale eed chen eque Bia egasdtes espe biis dde b Rd eoi 60 SECTION 8 DISPOSING OF THE INSTRUMENT 111 eee erre eeee nennen nennen nnn anna nnn nan n nnns 61 8 1 Disposing of Electrical and Electronic EQUIPMENt i 61 8 2 Disposing of Electrochemical Sensors nnne nnne nnns 61 SECTION 9 TECHNICAL DATA Liar 62 ga General SpeciNealONS TETUER 62 92 SOENS sO CCI CANONS sse a a a a A deg 63 Sox Modbus REJIS S nena e a a eene lo fusius 64 Sio ANGIOG INPUEREGISTe Sia 65 95 27 Jnalog OUT edislelS sirio 67 9 3 9 MMOUT StAtUs FAS asciende toa oor E rotto det n tito e atte tet rome 69 O34 O iput Status F AagBscusia
70. nsor without a power 1 cycle See section 4 3 6 Register Sensor F 06 on page 26 section 4 3 7 De register One Sensor F 07 on page 27 and section 4 3 8 De register All Sensors and Reset NOTICE Node Address F 08 on page 27 16 P N 1100 1000 Version 0 MGS 550 Fixed Gas Detector 3 4 5 Connecting One or More MGS 550s to a Bacharach Controller For wiring and configuration information please refer to the manual which was included with the Bacharach controller e g MGS GDA etc NOTICE e Atthe central control system connect the shield of the wires to the earth ground of the controller e g the chassis the ground bus bar etc e For 24 VDC installations the input is protected If the polarity is reversed the instrument will not power up e For 24 VAC installations in daisy chain the neutral polarity must be maintained for all instruments see example below AL B GI Biv TO OL LIT eae Aiea H8N0 s A LIS Os IS OI e n atte LIO OF RE RR cal JAMVAC ASNMAC HVAC AC j J VAC Z4VAC e u dn ooo o 23 PWR GND 3 4 6 Modbus RTU Interface e For the Modbus network use an 18 to 24 AWG 0 5 to 1 mm shielded twisted pair wire with a 1200 characteristic impedance e he Modbus address baud rate stop bit parity and slave termination is configured through the setup menu No jumpers or hardware switch settings are required e Ensure that the communication parameters within the ne
71. ode s Code Error Code s 5 3 2 Diagnostics Attributes Attribute Description D 01 Reads the current instrument fault code xxxx 0000 No faults 0001 Reported temperature outside operating range 0002 Master RX buffer full 0004 Slave RX buffer full 0008 CRC error in received packet Non critical E300 0010 CRC error in received packet Non critical E300 Non critical E300 0020 Packet timeout Non critical E300 Non critical E300 Non critical E300 0040 Either Current loop open Non critical E300 0080 Stuck key or magnetic switch Non critical E300 0100 No registered sensors Critical E100 0200 Sensor 1 reporting a critical fault Critical E100 0400 Sensor 2 reporting a critical fault Critical E100 0800 Sensor 1 is registered but not responding correctly or wrong sensor installed Critical E100 1000 Sensor 2 is registered but not responding correctly or wrong sensor installed Critical E100 2000 Power supply voltage s out of range Critical E100 4000 MPU clock fault Critical E100 8000 Can t read EEPROM Critical E100 For more information on these faults refer to table in section 5 3 3 Instrument Electronics Critical E100 Faults on page 41 and section 5 3 4 Non Critical E300 Faults on page 42 Refer to section 5 3 1Hexadecimal Format on page 39 for combined codes D 02 Displays the last fault that occur
72. onitored Modbus Registers Concentration registers stay at their last valid values Alarm States Any pre existing alarm condition is cancelled Faults Faults remain active but actions based on any pre existing fault are de asserted e g relays buzzer and Modbus flags 4 3 2 Zero Adjustment F 02 This function is used to adjust the zero reference point of the sensor See section 5 2 3 Zero Adjustment on page 38 for information 4 3 3 Span Adjustment F 03 This function is used to adjust the sensitivity to match the known concentration of an applied calibration gas See section 5 2 4 Span Adjustment on page 38 for information 4 3 4 Instrument Test F 04 This function tests the relays display and analog outputs by temporarily overriding them It might be necessary to inhibit the alarms at the central controller to avoid false alarms e Use the UP DOWN key to select the test to be performed o 1 relay test o 2 analog output test o 9 display test After exiting this function the instrument returns to the function menu and all test overrides are removed P N 1100 1000 Version 0 25 MGS 550 Fixed Gas Detector Description The relay test changes the state of each relay Use the UP DOWN key to toggle the relay Tap ENTER to test the next relay Tap i to exit the function Note that changing the state of the relays can trigger alarms in connected equipment The analog output test allows you to
73. or 4 2 4 Menu Overview The menu is divided in functions and parameters Individual parameters are grouped into logical menus Function Description Access parameters Parameters Description S1 XX Sensor 1 settings S2 XX Sensor 2 settings if connected RX XX Relay settings AF XX Alarm functions mo Display mode An example of the layered structure of functions menus and parameters is illustrated below Individual functions and parameters are described in detail in the sections that follow P N 1100 1000 Version 0 23 MGS 550 Fixed Gas Detector Main Display Functions Online Offline Zero Sensor Span Sensor Instrument Test Parameters Register Sensor De register Sensor All De register amp Reset Node Diagnostics Reset to Factory Default LI e m T o I Menus Sensor 1 Settings Sensor 2 Settings Relay Settings Alarm Functions Analog Output Config Modbus Config Display Mode Buzzer Config Diagnostics Parameters R3 01 Sensor Gas Name Sensor UID Low Alarm ppb ppm LEL Vol Med Alarm ppb ppm LEL Vol High Alarm ppb ppm LEL Vol Low Alarm Behavior Med Alarm Behavior High Alarm Behavior Sensor Type Code Sensor Units Sensor Full Scale Sensor Test Flag Relay 1 Contact Behavior Relay 1 Source Relay 2 Contact Behavior Relay 2 Source Relay 3 Contact Behavior Relay 3 Source Alarm ON Delay Value Alarm OFF Delay Value Critical Fault Latc
74. or secondary local sensors must be ordered as separate items NOTICE P N MGS 550 Ex d Instruments with Sensing Heads MGS 550 Instrument ONLY Ex d Enclosure For remote sensor applications order sensing heads 6600 8500 below 10 4 MGS 550 Gas Detector Ex d Enclosure with Ex d Sensing Head MGS 550 Gas Detector Ex d Enclosure with Ex d Sensing Head Installed at the Factory 6600 8516 MGS 550 Gas Detector Ex d IR Butane 0 100 LEL 6600 8517 MGS 550 Gas Detector Ex d IR Methane 0 100 LEL 6600 8518 MGS 550 Gas Detector Ex d IR Propane 0 100 LEL MGS 550 Gas Detector Ex d EC Os 0 30 Vol MGS 550 Gas Detector Ex d CT NHs 0 100 LEL MGS 550 Gas Detector Ex d CT LPG 0 100 LEL MGS 550 Gas Detector Ex d CT Methane 0 100 LEL MGS 550 Gas Detector Ex d CT Toluene Xylene Jet Fuels heavy hydrocarbons 0 100 LEL MGS 550 Gas Detector Ex d CT Propane 0 100 LEL MGS 550 Gas Detector Ex d CT Butane 0 100 LEL 6600 8540 MGS 550 Gas Detector Ex d SC R22 0 1000 ppm 6600 8541 MGS 550 Gas Detector Ex d SC R32 0 1000 ppm 6600 8542 MGS 550 Gas Detector Ex d SC R134a 0 1000 ppm 7A P N 1100 1000 Version 0 MGS 550 Fixed Gas Detector MGS 550 Gas Detector Ex d Enclosure with Ex d Sensing Head Pi Installed at the Factory P N 1100 1000 Version 0 75 MGS 550 Fixed Gas Detector 10 5 MGS 550 5m Remote and Second Sensing Heads Below is the MGS 550 Sensing Head Par
75. port the barbed fitting of the splash guard Push the calibration adapter over the sensing head assembly e he gas flow should be approximately 0 3 to 1 0 L min e Access the appropriate function as needed and begin the zero span or bump test If the intended operation is at higher altitudes the factory calibration will result in a reading that is lower than the reading at sea level a result of reduced partial pressure A new span adjustment is recommended if the altitude or the ambient pressure is changed The factory calibration is set to sea level NOTICE Tubing Sensor Gas Flow 1 0 Liter Per Minute EUS Calibration Regulator Port Calibration Adapter Calibration Gas Cylinder P N 1100 1000 Version 0 37 MGS 550 Fixed Gas Detector 5 2 3 Zero Adjustment Ambient air can be used to zero the sensor instead of nitrogen or synthetic air only if the area is known to be free of the target gas or any gas to which the sensor may be cross sensitive as listed on the sensor data sheet In this case no cylinder or calibration adapter is needed for the zero adjustment For semiconductor sensors you must use WARNING synthetic air only For oxygen O and carbon dioxide COs sensors use only nitrogen N gas WARNING e Enter the menu and select function F 02 Zero Sensor e Use UP DOWN to select the sensor to be calibrated then tap ENTER e Apply synthetic air i e 20 996 zero air or
76. r 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 or you may contact Bacharach directly If Bacharach is to do the repair work send the instrument prepaid to the closest Service Center Service Contact Information Service Shipping Address http mybacharach com rmaform Phone 1 724 334 5000 United States Toll Free 1800 736 4666 Fax 1 724 334 5001 Email help MyBacharach com 353 1 284 6388 353 1 284 6389 ask Murco ie Ireland 1 905 470 8985 1 905 470 8963 Bacharach Inc 621 Hunt Valley Circle New Kensington PA 15068 USA ATTN Service Department Murco A Bacharach Company 114A Georges Street Lower Dun Laoghaire Dublin Ireland ATTN Service Department Bacharach of Canada 20 Amber Street Unit 7 Markham Ontario L3R 5P4 Canada ATTN Service Department support BachCan ca Always include your RMA address telephone number contact name shipping billing information and a
77. r conditions are within specifications range for the instrument see section 9 1 General Specifications on page 62 and for the sensor see section 9 2 Sensor Specifications on page 63 Correct ambient air conditions Cycle power to the instrument Cycle power to the PLC or control system if applicable Verify proper shielding on network communications wiring Refer to section 3 1 General Information for Installation on page 11 and section 9 1 General Specifications on page 62 for more information Verify proper grounding of the communications wiring Refer to section 0 Connecting One or More MGS 550s to a Bacharach Controller on page 17 Verify proper communications settings for the network Refer to section 4 4 5 Modbus Configuration MB xx on page 35 for more information A possible hardware problem may exist Contact the factory Wire pin 3 to 4 or pin 5 to 6 on analog output 4 to 20 mA terminal See section 3 4 1 Preparations on page 12 Check the integrity of the 4 to 20 mA connections to the interface PCB If a sensor fault occurs during a gas alarm condition then the fault overrides the alarm condition for that sensor i e the alarm state s for that sensor de assert and the display shows E 100 Similarly if a critical fault occurs then all active alarm conditions will de assert Sensor faults for diagnostic attributes D 07 to D 10 may be decoded using the following table Note that
78. ready one sensor connected and it has already been registered the registered F 06 display is shown after a brief delay If the newly added sensor was previously unregistered or de registered i e address 100 reg 1 or reg 2 will be displayed depending on the configuration Tap ENTER to confirm registration of the sensor PASS1 or PASS2 will be displayed Normal registration adding a sensor If a sensor was previously registered in an instrument was not de registered was removed and then plugged in to a different instrument then a critical fault E100 error will occur Hefer to function F 08 to resolve Address conflict 4 3 7 De register One Sensor F 07 This function resets the registration of a sensor and changes a 2 sensor system to a 1 sensor system Removing a sensor without first de registering it will result in a fault Always de register a sensor before permanently removing it NOTICE Tap ENTER to display the unique sensor identifier UID Use the UP DOWN keys to select the sensor to be removed After tapping ENTER the sensor can be disconnected See section 5 4 Sensor Maintenance on page 44 for information A sensor s user editable parameters e g alarm setpoints etc are not retained after it is de registered If a sensor is registered again all parameters will be set to their factory default values NOTICE 4 3 8 De register All Sensors and Reset Node Address F
79. red since first start up or since the data logger was last erased See D 01 for more information Tap ENTER to clear Reserved Supply voltage Number of days since the last span calibration of Sensor 1 This value automatically resets to 0000 after completing a span adjustment via F 03 P N 1100 1000 Version 0 39 MGS 550 Fixed Gas Detector Attribute Description Number of days since the last span calibration of Sensor 2 This value automatically resets to 0000 after completing a span adjustment via F 03 D 07 Sensor 1 current fault code xxxx 0000 No faults 0001 No sensor signal 0002 Sensor board hardware fault 0004 EEPROM checksum fault 0008 Zero adjust out of range 0010 Span adjustment out of range 0020 Input voltage fault 0040 Microprocessor fault 0080 Software fault 0100 RS485 receiver fault 0200 RS485 checksum fault 0400 Modbus fault 0800 Temperature sensor fault 1000 Temperature out of range fault 2000 Analog front end communications fault 4000 Negative gas concentration fault 8000 Sensor configuration fault For more information on these faults Refer to table in section 5 3 5 Sensor Faults on page 42 Refer to section 5 3 1 Hexadecimal Format on page 39 for combined codes D09 Sensor 1 last fault code See D 07 list To clear tap ENTER Sensor 2 current fault code Same as D 07 See D 07 list Sensor 2 last fault code See D 07 list To clear tap ENTER 40 P N 1100
80. reset to 00 by either successfully completing a span adjustment The following parameters are sensor dependent Low alarm limit 81 03 and S2 03 see section 5 2 4 Span Adjustment on page 38 or High alarm limit 81 05 and S2 05 Unit of measurement 81 10 and 82 10 Factory default values for the alarm thresholds by changing the value manually 0 Sensor OK 1 Sensor in operation for gt 6 months without calibration Recalibration recommended P N 1100 1000 Version 0 29 MGS 550 Fixed Gas Detector A fixed hysteresis of 5 of full scale is set in order to avoid chatter at an alarm threshold NOTICE For all instruments except oxygen the alarm occurs on gas concentrations that increase beyond the set points Gas Concentration Non Oxygen Hysteresis Low Alarm On Level Alarm i Alarm Off Level Alarm State For all instruments monitoring oxygen the low and medium alarms occur on concentrations that decrease below the set points The high alarm occurs on gas NOTICE concentrations that increase beyond the set point This permits the detection of oxygen displacement and enrichment scenarios Gas Concentration Oxygen High Y Alarm On Level Alam sese eae ar 69 RARE ROSTER TII VG TEYICIUE UEM Hysteresis A Alarm Off Level High Alarm State Alarm Off Level Y E Low Are qM a NE a e dI Hysteresis Alarm Alarm On Lev
81. s Detector 4 4 4 Analog Output Configuration AX xx Parameter Name Description Analog Output 1 1 Sensor 1 Source 2 Sensor 2 Analog Output 1 Type 0 0t05V 121t05V 2 0t0 10 V 3 2to 10 V 4 4 to 20 mA Analog Output 1 Scales the FSD full scale deflection i e the measuring Scaling range between 20 and 100 FSD to the maximum analog output e g 20 mA The selected full scale deflection determines the analog output e g 20 mA signal on the analog interface Example Consider an application with a required range of 0 to 20 000 ppm CO with a min and max of 4 000 ppm and 20 000 ppm respectively To select full scale deflection as 10 000 ppm set this parameter to 50 The analog output will be linear between 4 MA 0 ppm and 20 MA 10 000 ppm However the resolution of the sensor stays at the value for the max range Alarm thresholds will not be changed when scaling the analog output These must be set separately See section 4 4 1 Sensor 1 Settings S1 xx and Sensor 2 Settings S2 NOTICE xx if Connected on page 29 Analog Output 1 Offset Sets an analog offset t 410 10 of full scale at the zero point This parameter adds an offset to the analog output The offset is constant over the entire range of the analog signal No re calibration necessary This parameter is essential for an installation where the analog current at the instrument differs from the current at the central controller
82. simultaneously for 5 seconds At the end of the test the relays revert to their normal operation 00006 Relay opened test Setting this flag to zero opens all 3 relays simultaneously for 5 seconds At the end of the test the relays revert to their normal operation 00007 Analog Output Zero Test Setting this to one O or 1 test in process drives the analog outputs to their minimum value This depends on the configuration of the analog output e For 4 20mA it will drive 4mA e For all voltage ranges it will drive OV During the test the Modbus flag will remain ON When the test is completed the flag will turn OFF 70 P N 1100 1000 Version 0 Description Display Test Mode Setting this sets all 7 segment display segments power LED and both units LEDs active simultaneously for 5 seconds At the end the display will revert to normal operation During the test the Modbus flag will remain ON When the test is completed the flag will turn OFF This test is only operative outside the menus MGS 550 Fixed Gas Detector O or 1 test in process P N 1100 1000 Version 0 71 MGS 550 Fixed Gas Detector SECTION 10 ORDERING INFORMATION 10 1 MGS 550 Instrument Only In the descriptions below MGS 550 Gas Detector includes an instrument and one sensing head mounted directly to the instrument housing Remote or secondary local sensors must be ordered as separate items NOTICE P N MGS 550 Instrument Only 6600
83. t Number Configurator Part number format is 6600 8ABC NOTICE All 5m remote and second directly mounted sensing heads must be ordered separately NOTICE Code IP66 Sensing Head Cable Type A A Select the Required Cable Length Noting the A Code e ex Sensing Head 5 meter cable for remote sensor apoleatons Ls Pee Sensing Head For mounting drecty to MGS S50 instrumen Codes Sensing Head Target Gas and Range B amp C B amp C Select the Target Gas and Range Noting the B amp C Codes IR Methane 0 100 LEL IR Propane 0 100 LEL EC NHs 0 100 ppm EC NH3 0 1000 ppm EC Os 0 1 ppm no IP rating N A in Ex d EC H2S 0 200 ppm EC HCl 0 10 ppm no IP rating N A in Ex d EC HCN 0 30 ppm 2 sc 76 P N 1100 1000 Version 0 MGS 550 Fixed Gas Detector Codes Sensing Head Target Gas and Range B amp C B amp C Select the Target Gas and Range Noting the B amp C Codes 3 5 senm ooon O OOOO 7 7 P N 1100 1000 Version 0 77 CO eee N O1 ORE tl a C1 MGS 550 Fixed Gas Detector 10 6 0MGS 550 Replacement Parts and Accessories MGS 550 Replacement Parts and Accessories P N 6600 8400 Replacement interface I O PCB Assembly MGS 550 GP Base PCB with terminal blocks for IP66 housing 6600 8401 Replacement interface I O PCB Assembly MGS 550 XP Base PCB with terminal blocks for Ex d housing Replacement
84. ting o Secondary circuit must be supplied from an isolating source not applicable for relay circuits o The wiring for the relays must be selected and fused according to the rated voltages currents and environmental conditions o If stranded conductors are used a ferrule should be used o To improve RFI immunity in extreme environments it might be necessary to ground the shield of the communications cable at the PLC GDA controller front end controller or Building Management System e g the chassis the ground bus bar etc 3 2 Installation Restrictions e The installation location must have appropriate supply power available for the instrument i e 19 5 to 28 5 VDC or 24 VAC Refer to section 9 Technical Data on page 62 This ultimately determines the distance the instrument can be mounted from the controller or power supply The MGS 550 must be powered by either e a suitable UL CSA IEC 60950 certified power supply that is isolated from line voltage by double insulation or WARNING e an appropriately rated UL listed CSA IEC Class 2 transformer The instrument accepts wire sizes of 16 AWG 1 5 mm to 20 AWG 0 5 mm Depending on the configuration use at least a shielded multi conductor cable The instrument must not be exposed to radiant heat that will cause the temperature to rise beyond the limits stated in section 9 Technical Data on page 62 The use of a reflecting shield is recommended The enclosure is
85. twork including the Building Management System are configured identically See section 4 4 5 Modbus Configuration MB xx on page 35 e If the MGS 550 is at the end of the Modbus network the terminating resistor must be set to IN All other instrument terminating resistor must be set to OUT factory default See section 4 4 5 Modbus Configuration MB xx on page 35 3 4 7 Conclusion After all wiring is completed be sure to replace components and seal the enclosure e Place the bezel and electronics circuit board back into the enclosure Secure them to the standoffs with the three screws e For the general purpose GP instrument put lid back on and tighten the four screws For the explosion proof XP instrument screw on the lid until it is seated and then tighten the set screw P N 1100 1000 Version 0 17 MGS 550 Fixed Gas Detector SECTION 4 OPERATION 4 1 Overview of Normal Operation Before leaving the instrument for normal operation check the configuration for proper settings and check calibration WARNING 4 1 1 Applying Power and the Start up Sequence After applying power the instrument will go through a start up sequence LED test software version and initialization and start the warm up period The power LED will blink and by default the display will remain blank To enable the display of gas type and concentration use parameter P1 01 which will cause the display to toggle between the target gas
86. up Verify Calibration Output Is Offline Verify Analog Outputs Normal Operation Verify Digital Signal Display Toggles Readings Change Values As Needed Exit Menu 4 1 2 Verifying Analog Signals During normal operation the current output of the instrument is proportional to the detected gas concentration and can be selected from the following 4 to 20 mA 0to5V 1to5V 0 to 10V 2to 10V The MGS 550 uses different current values to indicate various modes of operation See section 9 1 General Specifications on page 62 for additional information 4 1 3 Verifying the Digital Modbus Signal The MGS 550 provides a Modbus RTU digital interface All status messages and most parameters which can be accessed and or configured through the menu can also be accessed and or configured via a Building Management using a Modbus network See section 4 4 5 Modbus Configuration MB xx on page 35 4 1 4 The 5 Digit Display and LEDs In normal operation the 5 digit 7 segment LED display toggles between the gas name CO in this example and the measured gas concentration 291 ppm in this example C cL SU III RANE In addition the following special symbols and unique messages may also be displayed during operation of the instrument P N 1100 1000 Version 0 19 MGS 550 Fixed Gas Detector Symbol Message Description measuring range of the sensor has been exceeded upper hockey The sensor drifted negative 0 lower hockey sticks sy
87. w to use the product 1 2 General Safety Statements e Before using this product carefully read and strictly follow the instructions in the manual e Use the product only for the purposes specified in this document and under the conditions listed e Ensure that product documentation is retained made available and appropriately used by anyone operating the product e Comply with all local and national laws rules and regulations associated with this product e Only trained and competent personnel may use this product e 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 e Use only genuine Bacharach spare parts and accessories Otherwise operation may be impaired e Only operate the product within the framework of a risk based alarm signaling concept 1 3 Safe Connection of Electrical Devices e Before connecting this instrument to electrical devices not mentioned in this manual consult the manufacturer or a qualified professional P N 1100 1000 Version 0 5 MGS 550 Fixed Gas Detector SECTION 2 DESCRIPTION 2 1 Product Overview The Bacharach MGS 550 continuously monitors indoor or outdoor ambient air for the following gases e toxic and combustible gases e oxygen e refrigerants The instrument is housed in one of the following e rugged ABS enc

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