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Bacharach MGS-350 Installation And Operation Manual Download Page 40

MGS-350 Manual 

 

 

40 

6509-9000 Rev 1 

Section 5.  Troubleshooting 

Symptom 

Possible Cause(s) 

Green LED off after 
power up 

•

  Check power supply.  Check wiring. 

•

  Check for proper voltage at CON1. 

•

  MGS-350 was possibly damaged. Check 

by installing another MGS-350 to confirm 
the fault. 

Red light on, green led 
off (indicates a fault) 

•

  Sensor may be disconnected from 

printed circuit board.  Check to see 
sensor is properly inserted into board. 

•

  The sensor has been damaged or has 

reached the end of life and needs to be 
exchanged.  Contact Bacharach for 
instructions and support. 

Alarms in the absence 
of a leak; False alarms 

•

  Try setting an alarm delay. 

•

  Perform a bump test to ensure proper 

operation. 

•

  Increase the response time delay to help 

eliminate false alarms.  

•

  Try adjusting the zero setting. 

 
 
 
 
 
 
 
 
 
 
 
 
 

 

Summary of Contents for MGS-350

Page 1: ...MGS 350 Gas Detector Installation and Operation Manual Instruction 6509 9000 Revision 1 February 2013 Product Leadership Training Service Reliability...

Page 2: ...PPED TO THE MANUFACTURER BY PREPAID FREIGHT ALL RETURNED GOODS MUST BE PRE AUTHORIZED BY OBTAINING A RETURN MERCHANDISE AUTHORIZATION RMA NUMBER CONTACT THE MANUFACTURER FOR A NUMBER AND PROCEDURES RE...

Page 3: ...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 SOFTW...

Page 4: ...7 Components Overview and Configuration 19 2 8 Connecting to an MGS Controller 22 2 9 Connecting to a Repeater 23 SECTION 3 OPERATION AND STABILIZATION 24 SECTION 4 FUNCTIONAL TESTS AND CALIBRATION 2...

Page 5: ...e LPG Propane Butane and Hydrogen Toxic gases Hydrogen Sulfide in sewage treatment Carbon Monoxide in parking garages etc Volatile Organic Compounds Acetone Benzene Carbon Tetrachloride Chloroform Eth...

Page 6: ...rd w M42 Thread 75mm x 50 mm 3 0 x 2 0 in 72 g 0 2 lb IP66 w Remote Sensor Head 175 x 155 x 82 mm 6 9 x 6 1 x 3 2 in 917 g 2 0 lb Exd 130 x 175 x 90 mm 5 1 x 6 9 x 3 5 in 4003 g 8 8 lb Exd Digital Dis...

Page 7: ...Semi conductor SC Catalytic CAT Infrared IR Sensor Life Typical 3 years 5 8 years 5 years 5 years EC Sensors Formula Typical Detection Range s Ammonia NH3 0 100 ppm 0 1 000 ppm 0 5 000 ppm Carbon Mon...

Page 8: ...CAT Sensors Formula Typical Detection Range s All Combustible Gasses Selected 0 100 LEL SC Sensors Example Gases Typical Detection Range s HFCs R134a R404A R407C R410A R507 10 10 000 ppm HCFCs R22 10...

Page 9: ...4 to 122 F 20 to 50 C 40 to 122 F 40 to 50 C EC 4 to 104 F 20 to 40 C 40 to 104 F 40 to 40 C CAT 4 to 122 F 20 to 50 C 40 to 122 F 40 to 50 C IR 4 to 122 F 20 to 50 C 40 to 122 F 40 to 50 C For temper...

Page 10: ...MGS 350 Manual 10 6509 9000 Rev 1 Figure 2 MGS 350 IP66 Housing with Splash Guard...

Page 11: ...MGS 350 Manual 6509 9000 Rev 1 11 Figure 3 IP66 Splashguard M42 x 1 5 Thread Figure 4 IP66 Duct Mount Housing...

Page 12: ...MGS 350 Manual 12 6509 9000 Rev 1 Figure 5 Exd Housing Units mm...

Page 13: ...MGS 350 Manual 6509 9000 Rev 1 13 Figure 6 IP66 Housing with Remote Sensor Head NOTE For the Exd Remote Head and 16 4 ft 5 m cable the thread varies based on the model 9 8 feet 3 meters Typical...

Page 14: ...t monitor power and signaling terminals using wiring that complies with local electrical codes or regulations for the intended application CAUTION An earth ground connection must be made when using th...

Page 15: ...impurities Examples of situations where such abnormalities may arise include the following Plant room maintenance activity involving solvent or paint fumes or refrigerant leaks Accidental gas migratio...

Page 16: ...equipment to be monitored on a bracket or high on a wall within 12 in 300 mm of or on the ceiling provided there is no possibility of a thermal layer trapped under the ceiling preventing gas from rea...

Page 17: ...rigerant flow VRV VRF systems mount the sensor so as to monitor airflow to the extract fan With large units also place a sensor inside the enclosure under or adjacent to the compressors In the case of...

Page 18: ...the occupants E g in a hotel room this is less than bed height between 8 and 20 inches 200 and 500 mm off the floor under mirrors away from drafts and heat sources like radiators etc at vanity units t...

Page 19: ...nual 6509 9000 Rev 1 19 To clean the faceplate should be lightly dusted IMPORTANT Do not spray chemicals on the MGS 350 2 7 Components Overview and Configuration Figure 7 MGS 350 Connections and Key C...

Page 20: ...ty of this equipment is dependent on the integrity of the power supply and the grounding of the MGS 350 enclosure CON2 Optional display connector CON3 Analog Output Pin 1 0 V Pin 2 4 20 mA Load resist...

Page 21: ...2 5 70 4 6 5 0 5 38 2 6 71 4 7 6 0 6 39 2 7 72 4 8 7 0 7 40 2 8 73 4 9 8 0 8 41 2 9 74 4 A 9 0 9 42 2 A 75 4 B 10 0 A 43 2 B 76 4 C 11 0 B 44 2 C 77 4 D 12 0 C 45 2 D 78 4 E 13 0 D 46 2 E 79 4 F 14 0...

Page 22: ...the MGS 350 for alarm relay settings TP0 TP2 RV2 Alarm Threshold level set by RV2 and can be set by putting a meter between TP0 negative and TP3 positive and adjusting RV2 scale is 0 to 5V e g 2 5V i...

Page 23: ...an 31 MGS 350 sensors in the system or if your cable is longer than 1000 m then you must install a repeater An example repeater is the IR12 by Innotech The detailed specifications of this particular r...

Page 24: ...roximate time for the signal to drop to 0V is shown Sensor Type Stabilized 0 V Electrochemical EC 20 30 seconds Catalytic CAT 7 15 minutes Semiconductor SC 1 3 minutes Infrared IR 2 minutes The electr...

Page 25: ...edures below IMPORTANT Bacharach recommends annual checks and gas calibration Bacharach also recommends sensor replacement every 3 years or as required Calibration frequency may be extended based on a...

Page 26: ...no responsibility for the calibration testing or operation of this unit The frequency and nature of testing or calibration may be determined by local regulation or standards EN378 and the F GAS Regula...

Page 27: ...selected see JP1 and JP2 For bump test or calibration the MGS should be powered up overnight The instrument should be fully stabilized per Section 3 4 2 Bump Testing After installation the units shoul...

Page 28: ...technology used and the gas in question The MGS 350 is available in four sensor versions Semiconductor SC Electrochemical EC Catalytic CAT and Infrared IR Step Bump Testing Using Calibration Gas Cyli...

Page 29: ...its in the base of the beaker see Figure 9 3 Tighten the wing nut screw onto the ampoule without breaking it 4 Remove the enclosure lid of the gas detector not in an exhaust area 5 Connect a voltmeter...

Page 30: ...t least 50 typically of the test gas will confirm that the system is in order 9 Remove the beaker from the sensor Carefully remove any ampoule remains from the gas detector and beaker Figure 9 Gas Amp...

Page 31: ...nd PCB Set time delays if appropriate and power on the unit 3 Carry out a bump test to confirm that the sensor is responding 4 Keep records of the test date sensor serial number and any observations F...

Page 32: ...ite and the cost of the calibration gas and possibly excess delivery charges as it is classified as a hazardous substance The MGS 350 consists of a motherboard PCB and a sensor board PCB There are fou...

Page 33: ...signal should be adjusted to 0 4V Figure 12 Adjusting Alarm Relays on the Mother Board IMPORTANT RV3 is used to adjust the relationship between the 0 10 V scale and the 4 20mA scales THIS IS FACTORY...

Page 34: ...here are two adjustments required the zero and the span They are performed on the sensor board but are monitored on the motherboard at the 0 10 V output Step Calibrating Semiconductor SC Sensors 1 RV2...

Page 35: ...two adjustments required the zero and the span They are performed on the sensor board but are monitored on the motherboard at the 0 10V output IMPORTANT R7 is used to set the supply voltage to the sen...

Page 36: ...reads approximately 0 V 2 R1 is used to calibrate the range span of the sensor On the motherboard monitor the output between TP0 negative and CON3 pin 3 positive Expose the sensor to calibration gas...

Page 37: ...AND SHOULD NOT BE ADJUSTED Step Calibrating Electrochemical EC Sensors 1 VR201 is used to adjust the zero of sensor On the motherboard monitor the output between TP0 negative and CON3 pin 3 positive a...

Page 38: ...re 15 EC Sensor Board 4 8 Calibration Gas Method for IR Sensors There are two adjustments required the zero and the span They are performed on the sensor board but are monitored on the motherboard at...

Page 39: ...minimum of 3 minutes to stabilize and then adjust R7 until the voltmeter reads 0 V or slightly positive 0 01 V is acceptable 2 R1 is used to calibrate the range span of the sensor On the motherboard m...

Page 40: ...en led off indicates a fault Sensor may be disconnected from printed circuit board Check to see sensor is properly inserted into board The sensor has been damaged or has reached the end of life and ne...

Page 41: ...tive s Directive s 2004 108 EC EU EMC Directive 2006 95 EC Low Voltage Directive LVD Standard s IEC 61010 1 2010 EN 61010 1 2010 Safety Standards Electrical Equipment for Measurement Control and Labor...

Page 42: ...MGS 350 Manual 42 6509 9000 Rev 1...

Page 43: ...MGS 350 Manual 6509 9000 Rev 1 43...

Page 44: ...l 44 6509 9000 Rev 1 World Headquarters 621 Hunt Valley Circle New Kensington Pennsylvania 15068 Phone 724 334 5000 Toll Free 1 800 736 4666 Fax 724 334 5001 Website www MyBacharach com E mail help My...

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