Emerson Fisher 646- Manuals

Instruction Manual D101351X012 646 Transducer January 2015 5 Hazardous Area Classifications and Special Instructions for “Safe Use” andInstallation in Hazardous Locations Certain nameplates may carry more than one approval, and each approval may have unique installation/wiringrequirements and/or con...

Instruction Manual D101351X012 646 Transducer January 2015 6 FM Intrinsically Safe, Explosion proof, Type n Non‐incendive, Dust‐Ignition proof No special conditions for safe use. Refer to table 4 for additional information. Table 4. Hazardous Area Classifications—FM (United States) Certification Bod...

Instruction Manual D101351X012 646 Transducer January 2015 7 D  If using a rigid conduit connection, an Ex d certified sealing device such as a conduit seal with setting compound shall be provided immediately to the entrance of the enclosure. For ambient temperatures over 70 _ C, the wiring and sett...

Instruction Manual D101351X012 646 Transducer January 2015 8 Type n WARNING Disconnect power before opening. -40 _ C ≤ Ta ≤ +71 _ C ; T6 (Ta ≤ +71 _ C) Refer to table 6 for additional information. Table 6. Hazardous Area Classifications—IECEx Certificate Certification Obtained Entity Rating Temperat...

Instruction Manual D101351X012 646 Transducer January 2015 9 Figure 3. Dimensions and Connections 35 (1.38) 6.4 (.25) 127.0 (5.00) 72.8 (2.86 ) 102.1 (4.02 ) 152.4 (6.00) 152.4 (6.00) 79.2 (3.12) 47.8 (1.88) 127.0 (5.00) 9.5 (.38) 9.7 (0.38) mm (INCH) CENTERLINEOF ACTUATOR EXHAUST 1/4‐18 NPT OPTIONA...

Instruction Manual D101351X012 646 Transducer January 2015 10 Connect the nearest suitable supply source to the 1/4 NPT IN connection on the filter regulator (if furnished) or to the1/4 NPT SUPPLY connection on the transducer case (if the filter regulator is not attached). Diagnostic Connections To ...

Instruction Manual D101351X012 646 Transducer January 2015 11 For explosion‐proof Class 1, Division 1 applications using metal conduit, install a conduit seal no more than 457 mm (18inches) from the transducer. Personal injury or property damage may result from explosion if the seal is not installed...

Instruction Manual D101351X012 646 Transducer January 2015 12 Figure 7. Zero and Span Adjustments and Terminal Block Connections (Cap Removed) PRINTED WIRING BOARDS ZERO ADJUSTMENT SPAN ADJUSTMENT TRANSDUCERHOUSING FIELDWIRINGCONNECTION + − A3876‐2/IL Operating Information The normal mode of operati...

Instruction Manual D101351X012 646 Transducer January 2015 13 Refer to figure 7 for adjustment locations. 1. If a current source other than the control device is used as the input source, disconnect the control device and connect the current source positive terminal to the transducer “+” terminal an...

Instruction Manual D101351X012 646 Transducer January 2015 14 Maintenance The normal mode of operation for the 646 transducer requires that the pneumatic output pressure be piped to thefinal control element. If this is not done the resulting pneumatic output will vent to the atmosphere. Due to norma...

Instruction Manual D101351X012 646 Transducer January 2015 15 Electrical 1. Ensure terminal lug connections from the control device to the transducer are of the correct polarity (refer to the electrical connection procedures in the Installation section). 2. At the transducer, ensure that the milliam...

Instruction Manual D101351X012 646 Transducer January 2015 16 Relay Maintenance Refer to figure 10 for key number locations. Removal 1. Remove the four mounting screws (key 7) and remove the relay from the transducer. Be careful not to lose the bias spring (key 13) and input diaphragm (key 9). 2. Re...

Instruction Manual D101351X012 646 Transducer January 2015 17 2. Insert the assembled valve plug, inner valve spring, and body plug into the relay body (key 1). Compress the spring and thread the body plug (key 5) into place. Then, tighten the body plug. 3. Insert two of the mounting screws (key 7) ...

Instruction Manual D101351X012 646 Transducer January 2015 18 Parts Ordering A serial number is assigned to each transducer and stamped on the nameplate. Always refer to this serial number whencorresponding with your Emerson Process Management sales office regarding spare parts or technical informat...

Instruction Manual D101351X012 646 Transducer January 2015 19 Figure 10. Fisher 646 Transducer Assembly CONVERTERMODULE NOTE:KEY NUMBER 49 IS NOT SHOWN APPLY LUB/SEALANT 41B2373‐E/DOC

Instruction Manual D101351X012 646 Transducer January 2015 20 Diagnostic Connections Note Part numbers are shown for recommended spares only. For partnumbers not shown, contact your Emerson Process Management salesoffice. Description FlowScanner t diagnostic system hook‐up  Includes pipe tee, pipe n...

Instruction Manual D101351X012 646 Transducer January 2015 21 Figure 11. Typical Fisher 646 Mounting With 67CFR Filter Regulator 38b3958‐AB2381‐2 / IL NOTES: 3/8‐INCH TUBING SUPPLIED ONLY WHEN 646 IS FACTORY MOUNTEDKEY NUMBERS 24, 25, 27, 32, 33, 37, 38, 39 ARE NOT SHOWN. SUPPLY OUTPUT 1 1 Key Descr...

Instruction Manual D101351X012 646 Transducer January 2015 22 Loop Schematics Figure 12. CSA Loop Schematic (Installation Drawing GE28591) GE28591E1088 NOTES:1. BARRIERS MUST BE CSA CERTIFIED WITH ENTITY PARAMETERS  AND ARE TO BE INSTALLED IN ACCORDANCE WITH THE  MANUFACTURER'S I.S. INSTALLATION INS...