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Easy parts replacement in the  
most accurate and reliable single 
run gas flow computer 
 
 
 
 
 
 
 
 
 

Introduction 

This guide is designed for typical installations only. Maintenance must be performed 
by personnel knowledgeable of the ABB Totalflow

®

 

µ

FLO

G5

 flow computer, the 

integral multivariable transducer (IMV), and the theory of natural gas electronic flow 
measurement. Maintenance personnel must also be knowledgeable of local and 
national codes as they apply to hazardous areas, communication wiring, and 
electrical wiring. 
Read and consider the contents of this guide prior to beginning installation of the 
equipment. If for some reason there are questions that are not answered in this 
guide, or other documentation listed in the following section, call the local ABB 
representative, or call the main office number listed on the back page of this guide. 

 

CAUTION – Equipment damage.

 The 

µ

FLO

G5

 flow computer operating 

temperature range differs from the 

µ

FLO

G4

. The 

µ

FLO

G5

 is rated for 

ambient temperatures between -40 °F and +158 °F (-40 °C and +70 °C).

Purpose 

This guide provides easy-to-follow instructions for replacement of all available spare 
part components.  
 
 

Application guide 

G5 flow computers 

µ

FLO

G5

 (microFLO

G5

Component replacement instructions 

Summary of Contents for Totalflow G5 Series

Page 1: ...ad and consider the contents of this guide prior to beginning installation of the equipment If for some reason there are questions that are not answered in this guide or other documentation listed in the following section call the local ABB representative or call the main office number listed on the back page of this guide CAUTION Equipment damage The µFLOG5 flow computer operating temperature ran...

Page 2: ...X Cert EX II 3G Ex nA IIB Zone 2 2104152 IECEx Cert Ex nA IIB Zone 2 2100750 Assumptions For any questions that are not answered in this guide or the other documentation listed in the previous section call the local ABB representative or call the main office number listed on the back page of this guide The following apply to the instructions in this guide A µFLOG5 flow computer is already installe...

Page 3: ...rd WARNING indicates a potentially dangerous electrical situation Failure to observe this safety information may result in severe injury The text may state the hazard how to avoid the hazard and what the result would be if not followed CAUTION Equipment damage This symbol in conjunction with the signal word CAUTION indicates a potentially dangerous situation Failure to observe this safety informat...

Page 4: ...n the order in which they should be used Table 1 Procedure and component instruction matrix Section for procedures related to component replacement Page I O expansion board µFLO G5 electronic board µFLO G5 transducer µFLO G5 IMV assembly 3 1 Preserving data and configuration files 5 3 2 Disconnect power 5 3 3 Restore power 6 3 4 1 Remove the I O expansion board 6 3 4 2 Reinstall the I O expansion ...

Page 5: ... Re create TFCold function of the Update TFCold Start Configuration procedure which is detailed in the user manual listed earlier in the Additional information section of this guide 3 Back up all device software to the host computer operating PCCU32 software Use the Save the TFCold Cold configuration to the PC procedure detailed in the user manual listed earlier in the Additional information secti...

Page 6: ...turn here when completed 2 Follow the procedure in section 3 2 Disconnect power on page 5 Return here when completed 3 If removing the I O expansion board as part of another service procedure it may not be necessary to disconnect the field wiring Otherwise disconnect the following field wiring connections on the I O expansion board Figure 2 a Communication wiring from J2 b DI wiring from J9 c DO w...

Page 7: ... screwdriver to loosen the four 4 mounting screws that attach the I O board to the µFLOG5 board Alternate between the four screws one to two turns each As the screws are loosened the J2 connector is gradually disconnected from the electronic board socket The mounting screws are held in place with a screw keeper 5 Grasp the expansion board on either side and gently lift up from the µFLOG5 electroni...

Page 8: ...1 2 3 7 8 9 A B C D E F G H J K V V I I V V I I V V I I J7 9 8 7 6 5 4 3 2 1 S1 J6 14 13 12 11 10 9 8 7 6 5 4 3 2 1 J11 6 5 4 3 2 1 S2 S5 S4 J16 J4 J9 J12 J8 J1 BARCODE TAG DO DI 1 2 RESET WARM WAKE RESET COLD SHLD OUT IN uSD ACTIVITY LINK ETHERNET DISPLAY MMI USB RESET OFF ON SECURITY R12 COMMUNICATIONS S3 O N 1 2 J13 J10 J3 RTD 1 2 1 2 3 S1 J8 J5 J2 J9 DI DO 3 1 J7 3 1 J10 3 1 J6 J6 J10 CFG 1 2 ...

Page 9: ...emoved a Communication wiring from J2 b DI wiring from J9 c DO wiring from J5 d AI 1 wiring from J4 e AI 2 wiring from J8 4 If performing additional procedures return to those instructions Otherwise follow the procedure in section 3 3 Restore power on page 6 ...

Page 10: ...onnections MMI communication cable plug from J9 USB cable plug from J4 Ethernet cable plug from J1 c Field wiring connections Communication wiring from J10 DI wiring from J12 DO wiring from J13 RTD sensor from J3 5 On the transducer housing assembly use a phillips screwdriver to remove the four 4 screws that attach the cover plate that contains the transducer information Remove and set the plate a...

Page 11: ...ousing carefully The electronic board to transducer sensor cable is very short approximately 3 inches Do not pull the board completely away until the cable has been disconnected from the back of the board 9 Grasp the electronic board to transducer sensor cable at the back of the board and disconnect it µFLOG5 electronic board Optional I O expansion card MMI connector Cover plate Transducer housing...

Page 12: ...on cable plug to J9 USB cable plug to J4 Ethernet cable plug to J1 d Field wiring connections Communication wiring to J10 DI wiring to J12 DO wiring to J13 RTD sensor to J3 7 Follow the instructions in section 3 3 Restore power on page 6 to apply power to the flow computer Return here when completed This completes replacement of the electronic board If necessary follow instructions located in the ...

Page 13: ...or b Communication connections MMI communication cable plug from J9 USB cable plug from J4 Ethernet cable plug from J1 c Field wiring connections Communication wiring from J10 DI wiring from J12 DO wiring from J13 RTD sensor from J3 DANGER Serious damage to health risk to life Preparation for removing the IMV should include shutting in the measurement sensor and disconnecting the high and low inpu...

Page 14: ...s washers and lock washers located on the bottom of the enclosure that secure the IMV to the µFLO cabinet Figure 5 µFLOG5 assembly exploded view page 11 Be careful not to drop the screws b Loosen the IMV by tilting it slightly forwards and then backwards Carefully slide the upper body of the assembly down through the bottom access cutout until clear c The weather sealing gasket is affixed to the t...

Page 15: ...es IMV assembly replacement complete To install the complete IMV assembly perform the following steps 1 Place the clean weather sealing gasket over the upper body of the IMV assembly and move the gasket down to the mounting plate just below the electronic board Figure 6 µFLOG5 IMV Assembly complete Optional I O expansion card MMI connector Lithium battery Gasket Liquid crystal display Battery tray...

Page 16: ...ed in the startup guide included in this kit Complete the remaining procedures in this guide before beginning startup procedures b After rotation tighten the clamp bolts to hold the µFLO in place 7 Follow the procedure in section 3 4 2 Reinstall the I O expansion board on page 8 if previously removed 8 Reconnect the following if disconnected to the µFLOG5 electronic board a LCD display cable from ...

Page 17: ...ately 3 inches Do not pull the board completely away until the cable is disconnected from the back of the board Grasp the electronic board to transducer sensor cable at the back of the board and disconnect it 3 Transfer the electronic board to the replacement transducer assembly a On the new transducer assembly use a phillips screwdriver to remove the four 4 screws that secure the transducer cover...

Page 18: ...the first applicable section for your installation DANGER Serious damage to health risk to life Manifold and tubing connection leaks could create a build up of explosive gases in the immediate vicinity Power should not be applied before the tubing and connections are leak free the area is ventilated and explosive gases have dissipated In some instances it may be desirable to restore station and co...

Page 19: ......

Page 20: ...ck of information in this document The original US English version of this manual shall be deemed the only valid version Translated versions in any other language shall be maintained as accurately as possible Should any discrepancies exist the US English version will be considered final ABB is not liable for any errors and omissions in the translated materials Any and all derivatives of including ...

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