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FMG90B Series 

Safety instructions  

Technical changes reserved 

 

- 7 - 

2  Safety instructions  

 

Before you install the FMG90B, read through this operating manual carefully. If the 

instructions contained within it are not followed, in particular the safety guidelines, this could 

result in danger for people, the environment, and the device and the system it is connected 

to. 
The FMG90B corresponds to the state-of-the-art technology. This concerns the accuracy, the 

operating mode and the safe operation of the device. 
In order to guarantee that the device operates safely, the operator must act competently and 

be conscious of safety issues.  
OMEGA provides support for the use of its products either personally or via relevant 

literature. The customer verifies that our product is fit for purpose based on our technical 

information. The customer performs customer- and application-specific tests to ensure that 

the product is suitable for the intended use. With this verification all hazards and risks are 

transferred to our customers; our warranty is not valid. 

Qualified personnel: 

 

The personnel who are charged for the installation, operation and maintenance of the 

FMG90B must hold a relevant qualification. This can be based on training or relevant 

tuition.  

The personnel must be aware of this operating manual and have access to it at all times. 

 

The electrical connection should only be carried out by a fully qualified electrician. 

General safety instructions: 

 

In all work, the existing national regulations for accident prevention and safety in the 

workplace must be complied with. Any internal regulations of the operator must also be 

complied with, even if these are not mentioned in this manual. 

 

Degree of protection according to EN 60529: 

Please ensure that the ambient conditions at the site of use does not exceed the 

requirements for the stated protection rating (

 § 9 "Technical data")

 

Prevent freezing of the medium in the device with appropriate measures. 

 

Only use the FMG90B if it is in perfect condition. Damaged or faulty devices must be 

checked without delay and, if necessary, replaced. 

 

When fitting, connecting and removing use only suitable appropriate tools. 

 

Do not remove or obliterate type plates or other markings on the device, as otherwise the 

warranty is rendered null and void. 

Special safety instructions: 

 

Crystallizing liquids:  

Liquids which crystallize when dried out can cause a malfunction of the FMG90B. 

  Make sure that the FMG90B is not run dry. 

  Prevent the crystallization of the fluid in the device by taking appropriate measures.  

 

Further warnings that are specifically relevant to individual operating procedures or activities 

can be found at the beginning of the relevant sections of this operating manual. 
 

 

Summary of Contents for FMG90B Series

Page 1: ...Electromagnetic Flow Meter FMG90B Series...

Page 2: ...2...

Page 3: ...d measuring operation 13 6 1 Commissioning 13 6 2 Switching on and off 13 6 3 Measuring operation 13 7 Maintenance and cleaning 14 8 Disassembly and disposal 15 9 Technical data 16 9 1 Characteristics...

Page 4: ...ngers that cause personal injuries that can lead to health defects or cause considerable damage to property CAUTION Electric current This sign indicates dangers which could arise from handling of elec...

Page 5: ...its have been carefully checked for their operational reliability before shipment Immediately after receipt please check the outer packaging for damages or any signs of improper handling Report any po...

Page 6: ...ces be exceeded Before installing the device check that the wetted materials of the device are compatible with the media being used 9 Technical data Measuring tube empty or partially filled Conductivi...

Page 7: ...must be aware of this operating manual and have access to it at all times The electrical connection should only be carried out by a fully qualified electrician General safety instructions In all work...

Page 8: ...dle of the measuring tube between the grounding sleeves The FMG90B does not need any moving parts to make measurements The inside of the measuring tube is completely open allowing the fluid to flow un...

Page 9: ...ITABLE TOOLS Use only suitable tools of the correct size 4 1 Installation instructions CAUTION Risk of malfunction due to external magnetic fields Magnetic fields close to the device can cause malfunc...

Page 10: ...due to mutual interference 4 2 Assembly The FMG90B is installed directly into the pipeline The compact design and light weight of the unit make wall mounting unnecessary IMPORTANT NOTICES Only use sui...

Page 11: ...UTION Electric current The electrical connection should only be carried out by a fully qualified electrician De energize the electrical system before connecting the FMG90B Connection cable Suitable co...

Page 12: ...e Supply voltage FMG90B with frequency output Push Pull NPN Open Collector PNP Open Collector 1 Push Pull switching outputs of several FMG90B may not be connected in parallel 2 Recommendation Pull Up...

Page 13: ...voltage Switch on the supply voltage The green LED lights up The FMG90B is ready and goes into measuring mode 6 3 Measuring operation In the measuring mode the green LED flashes proportional to the me...

Page 14: ...of a defect the device must be replaced or sent back the manufacturer for repair CAUTION Material damage When opening the device critical parts or components can be damage Never open the device and pe...

Page 15: ...re disassembly Prior to disassembly ensure that the equipment is switched off and is in a safe and de energized state the equipment is depressurized and has cooled down Disassembly Remove the electric...

Page 16: ...tion ml pulse 0 1 0 25 1 0 2 5 5 0 12 5 Signal shape Square wave signal duty cycle 50 50 Push Pull NPN open collector PNP open collector Signal current 100 mA Electrical characteristics Supply voltage...

Page 17: ...als table Component Material Component wetted Housing ABS Measuring tube POM or PVDF option X Process connections POM or PVDF option X O ring EPDM or FKM option X Electrodes and grounding rings Stainl...

Page 18: ...FMG98B 0 0 0 5 1 0 1 5 2 0 2 5 3 0 0 0 1 0 2 0 3 0 4 0 5 0 6 Pressure drop p psi Flow rate Q GPM US version 0 0 0 5 1 0 1 5 2 0 2 5 0 0 25 0 5 0 75 1 1 25 1 5 Pressure drop p psi Flow rate Q GPM 0 00...

Page 19: ...915B FMG920B FMG925B 0 000 0 125 0 250 0 375 0 500 0 2 4 6 8 10 12 14 Pressure drop p psi Flow rate Q GPM 0 0 0 5 1 0 1 5 2 0 0 10 20 30 40 50 Pressure drop p psi Flow rate Q GPM 0 0 0 1 0 2 0 3 0 4 0...

Page 20: ...20 9 4 Dimensions FMG90B FMG96B Type L1 L2 D1 D2 FMG93B 3 35 0 51 NPT 0 12 FMG96B 3 35 0 51 NPT 0 31 x 0 08 FMG98B 3 35 0 51 NPT 0 31 FMG915B 3 54 0 63 NPT 0 55 FMG920B 3 54 0 63 1 NPT 0 71 FMG925B L1...

Page 21: ...FMG90B Series For your notes Technical changes reserved 21 For your notes...

Page 22: ...For your notes FMG90B Series 22 For your notes...

Page 23: ......

Page 24: ...M5759 0220...

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