Bacharach MGS-250 User Manual

Name: Bacharach MGS-250
Brand: Bacharach
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60 pages

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Infrared Gas Detector

Installation and Operation Manual

Instruction 6490-9000

June 2015

Revision 3

Product Leadership

• Training • Service • Reliability

Instruction2
Instruction3
Table of Contents5
Introduction9
Figure 1. MGS-250 Components9
Section 1. Introduction9
Overview9
Detection Options10
- Broadband Vs. Gas Specific10
- Broadband Gas Detection10
- Table 1: Broadband Gas Groups and Performance (P/N 6401-0500)10
- Detecting Specific Gases11
- Figure 2. Broadband Gas Groups 1-311
- Figure 3. Gas Specific MGS-250 Gas Detectors12
- Table 2: Gas Specific Detector Measurement Performance13
- Figure 4. Changing Gas Types and Accuracy14
Table 3: Parts List15
Remote Controller Options15
Parts List15
Table 4: Technical Specifications16
Specifications16
Mounting the Gas Detector17
Warnings and Prerequisites17
Mounting Locations17
- General Placement Guidelines17
- Machinery Rooms18
- Refrigerated Spaces18
- Chillers19
Mounting Procedure19
Figure 5. Initial Housing Separation20
Figure 6. Front and Back Views of MGS-250 Base21
Figure 7. Terminal Blocks and Cable Glands22
Wiring and Configuration22
Overview22
Table 5: Power Options and Terminal Block Connections23
Figure 8. Supply Power Wiring Options23
Wiring Supply Power (24VAC or 24VDC)23
Figure 9. Maintaining Neutral Polarity24
Table 6: Alarm Output Terminal Block Connections25
Figure 10. Analog Output Wiring25
Wiring Alarm Output (Analog Signal)25
Table 7: Relay Output Terminal Block Connections26
Figure 11. Sample Relay Output Wiring26
Wiring the Digital Alarm Output Relay26
Table 8: Modbus Network Communications Connections27
Figure 12. Modbus Network Wiring27
Modbus Network Configuration27
Figure 13. Setting Network Termination Resistors29
Conclusion29
Operation and Stabilization30
Power up and Warmup30
Stabilization30
Perform a Manual Zero30
Alarms31
- Gas Detector Faults31
Non-Critical Faults31
Table 9: MGS-250 Behavior During Alarm Conditions31
Overview31
Critical Faults32
Table 10: MGS-250 Behavior During a Non-Critical Fault32
Table 11: MGS-250 Behavior During a Critical Fault32
Configure the Gas Detector33
User Interface Overview33
Table 12: Button Functions33
Figure 14. the User Interface of the MGS-25033
Setting Parameters34
- Overview34
- Configuration Parameters34
- Table 13: Parameter Numbers, Names and Descriptions34
- Figure 15. Analog Output Scaling Options39
Completing Setup42
Functional Tests and Adjustments43
Introduction43
Bump Testing Vs. Adjusting Detector Response44
Bump Testing45
Adjustment Using Calibration Gas46
Figure 16. Using Calibration Gas46
Section 7. Modbus Communications49
Modbus Communications49
Introduction49
Communications Settings49
Analog Input Registers50
Table 14: Analog Input Registers50
Analog Output Registers51
Table 15: Analog Output Registers51
Input Status Flags52
Output Status Flags52
Table 16: Input Status Flags52
Table 17: Output Status Flags52
Section 8. Troubleshooting53
Troubleshooting53
Fault Codes53
Table 18: Fault Codes54
Diagnostics Attributes (P.-18)55
Table 19: Diagnostic Attributes55
Resetting MGS-250 to Default Values56
Table 20: Other Symptoms and Possible Causes57
Other Symptoms57
Table 21: Replacement Parts and Accessories58
Section 9. Replacement Parts and Accessories58
Ce Declaration of Conformity59

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General

Brand	Bacharach
Model	MGS-250
Category	Security Sensors
Language	English

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