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Ramsey Model 61-12N Speed Sensor REC 4374B 

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Centering Template for Speed Sensor 

 
 
 
 

 

 
 
 
 
 

 

 

Summary of Contents for 61-12N-64P

Page 1: ...Thermo Fisher Scientific Speed Sensor Model 61 12N 64P Operating and Service Manual REC 4374 Rev C Part Number 136294 English...

Page 2: ...c also may seek to protect this work as an unpublished copyright In the event of either inadvertent or deliberate publication Thermo Fisher Scientific intends to enforce its rights to this work under...

Page 3: ...on Number Date Revised ECO Number Revision Specifics Revision A January 2014 3391 New Release Revision B September 22 2016 4227 Update to Hazardous Revision C September 20 2019 5053 Added metric coupl...

Page 4: ...ecifications 6 Installation 6 Overview 6 Coupling Installation 7 Restraint Arm Installation 8 Alternate Sensor Location 9 Operations 12 Maintenance 12 Service Repair Replacement Parts 14 Service and R...

Page 5: ...ensor employs an optical pulse generator producing a stream of pulses each pulse representing a unit of belt travel Frequency of the pulse stream is proportional to true belt speed Figure 1 Model 61 1...

Page 6: ...to 176 F Temperature T4 temperature identification Speed 350 RPM maximum Pulse Output Rate 64 pulses per shaft revolution Cable Length 20 AWG Belden 8772 or equal up to 500 feet 150 meters 18 AWG Beld...

Page 7: ...of this manual may be cut out and used as a centering guide Refer to Figure 2 1 Locate circle guide over tail pulley shaft and punch center Drill a 1 deep hole usi g a d ill Drilling a smaller pilot...

Page 8: ...direction that will allow the sensor restraint arm to twist against the mechanical stop and in the direction of belt travel 2 Weld or otherwise secure an appropriate mechanical stop such as a piece of...

Page 9: ...itional pulley for the speed sensor the following requirements are essential 1 Select the proper pulley diameter to provide a shaft RPM within the range of the speed sensor at rated belt speed or over...

Page 10: ...as to gi e sp i g st et h 3 All wiring by others in accordance with system field wiring diagram and applicable codes Figure 5 Outline and Mounting Dimensions Notes 1 Speed Sensor to be driven by conve...

Page 11: ...s 4 Do not put speed sensor cables in the same conduit as power wiring 5 Connect one wire to each of terminals 15 16 and 17 as shown in Figure 6 Replace the terminal strip cover CAUTION The three wire...

Page 12: ...t of the 61 12N P is a ope d ai t pe hi h e ui es a e te al pull up resistance Nearly all Thermo Scientific Belt Scale Integrators provide this pull up resistance internally Maintenance Overview When...

Page 13: ...4 If voltage is present check field wiring If no voltage present repair or replace integrator 5 Place AC voltmeter across field terminals 15 and 16 of 61 12N 64P speed sensor 6 With conveyor stopped o...

Page 14: ...tions of the replaceable parts for the 61 12N 64P Speed Sensor ITEM DESCRIPTION PART NO 61 12N 64P 64 pulse 24 VDC 133748 Clamp Bar Restraint Arm 002920 Coupling Stub Shaft Speed Sensor 037711 IMPERIA...

Page 15: ...Ramsey Model 61 12N Speed Sensor REC 4374B Page 16 Centering Template for Speed Sensor...

Page 16: ...Appendix A Drawings List of drawings Drawing 07392BE041 Drawing 07392BE042 Drawing 07392BE043...

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