Instruction Manual

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Fisherr 546 Electro‐Pneumatic Transducer

Contents

Introduction 1.................................

Scope of Manual 1.............................

Description 3.................................

Specifications 4...............................

Educational Services 4.........................

Installation 5..................................

Mounting 5..................................

Pressure Connections 5........................

Diagnostic Connections 6......................

Electrical Connections 6........................

Operating Information 7.........................

Adjustments 8................................

Calibration 8.................................

Equipment Required 8......................

Calibration Procedure 9.....................

Recalibration 10...........................

Changing Output Pressure Range 10.............

Reversing the Action 10........................

Split Range Operation 11.......................

Principle of Operation 11........................

Maintenance 13................................

Relay Removal and Replacement 14..............

Replacing the Feedback Bellows Assembly 14......

Troubleshooting 14............................

Electrical 14..............................

Pneumatic 15.............................

Alignment 15.................................

Span Adjustment 15.......................

Torque Motor Frame 16....................

Armature Travel Stop 16....................

Coil 16...................................

Figure 1. Fisher 546 Electro‐Pneumatic Transducer

Mounted on a 657 Pneumatic Diaphragm Actuator

W2115

546

FILTER

REGULATOR

Parts Ordering 16...............................

Parts List 17...................................

Repair Kits 17.................................

Transducers 17...............................

Torque Motor 18..............................

Mounting Parts 20.............................

Diagnostic Connections 22.....................

Introduction

Scope of Manual

This instruction manual provides installation, operation, maintenance, and parts ordering information for Fisher 546

transducers and the 82 relay. Refer to separate manuals for instructions covering equipment used with the transducer.

Do not install, operate or maintain a 546 transducer without being fully trained and qualified in valve, actuator and

accessory installation, operation and maintenance. To avoid personal injury or property damage it is important to

carefully read, understand, and follow all of the contents of this manual, including all safety cautions and warnings. If

you have any questions about these instructions, contact your Emerson Process Management sales office before

proceeding.

Instruction Manual

D200108X012

546 Transducer

March 2015

Summary of content (24 pages)

PAGE 1
Instruction Manual 546 Transducer D200108X012 March 2015 Fisherr 546 Electro‐Pneumatic Transducer Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Scope of Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Educational Services . . . . . . . . . . . . . . . . . . . . . . . . .
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Instruction Manual 546 Transducer D200108X012 March 2015 Table 1. Specifications Performance(3) Available Configurations Actuator Loading Time: See figure 7 Reference Accuracy: ±0.75% of output signal span Independent Linearity: ±0.
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Instruction Manual 546 Transducer D200108X012 March 2015 Table 1. Specifications (continued) Approximate Weight 3 of the Pressure Equipment Directive (PED) 97 / 23 / EC. It was designed and manufactured in accordance with Sound Engineering Practice (SEP) and cannot bear the CE marking related to PED compliance. 4.
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546 Transducer Instruction Manual March 2015 D200108X012 Figure 2. FM and CSA Approvals Nameplate for Fisher 546 WARNING The 546 transducer does not meet third party approvals (CSA or FM) for use with natural gas as the supply medium. Use of natural gas as the supply medium can damage the instrument and result in personal injury or property damage from fire or explosion. The 546 does not meet third party approvals for use with natural gas.
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Instruction Manual D200108X012 546 Transducer March 2015 Installation WARNING Avoid personal injury from sudden release of process pressure. Before mounting the controller: D Always wear protective clothing, gloves, and eyewear when performing any installation operations to avoid personal injury. D Check with your process or safety engineer for any additional measures that must be taken to protect against process media.
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Instruction Manual 546 Transducer D200108X012 March 2015 If specified, the filter regulator is mounted on the transducer case. A pressure gauge on the regulator shows the supply pressure to the transducer. 1. Connect a supply pressure source to the 1/4 NPT IN connection on the filter regulator (if furnished) or to the 1/4 NPT SUPPLY connection on the transducer case (if a regulator is not furnished). 2. Run 9.
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Instruction Manual 546 Transducer D200108X012 March 2015 For explosion‐proof applications, install rigid metal conduit and a conduit seal no more than 457 mm (18 inches) from the transducer. Personal injury or property damage may result from explosion if the seal is not installed. Select wiring and/or cable glands that are rated for the environment of use (such as hazardous area, ingress protection, and temperature).
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Instruction Manual 546 Transducer D200108X012 March 2015 If the transducer is installed in an application where explosion‐proof classification is required, perform the following steps (prior to removal of the transducer cover) when any procedure in this section requires removal of the cover: D Disconnect the electrical signal from the transducer. D Remove the transducer to a non‐hazardous area. D Perform procedures as described in this section.
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Instruction Manual D200108X012 546 Transducer March 2015 Calibration Procedure Note The following calibration procedure is for a 546 transducer with a 4 to 20 mA DC input signal range and a 0.2 to 1.0 bar (3 to 15 psig) output range. Calibrate transducers with other inputs and outputs in a similar manner. 1. 2. 3. 4. 5. Check the supply pressure to ensure it agrees with the minimum pressure on the transducer nameplate. Adjust the input current to 4.00 mA DC.
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Instruction Manual 546 Transducer D200108X012 March 2015 10. After completing the calibration cycle and recording data, verify that all data is within ±0.75% accuracy limits. If not, the transducer may need to be recalibrated to move the end points slightly to bring the entire calibration curve within the accuracy limits. Recalibration Table 5 shows typical recorded data where recalibration is necessary. Table 5. Typical Calibration Data TRANSDUCER INPUT ACTUAL OUTPUT PRESSURE mA DC 12.00 16.00 20.
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Instruction Manual 546 Transducer D200108X012 March 2015 the opposite action. Whenever the action is changed, readjust the zero of the transducer as outlined in the adjustments procedures. Split Range Operation 546 transducers are suitable for two‐way split range operation. In a two‐way split the milliampere (mA) or voltage output signal of a single control device is split between two transducers electrically connected in series.
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Instruction Manual 546 Transducer D200108X012 March 2015 Figure 7 shows output‐time relationship curves for loading and exhausting an actuator. Exhausting times are nominally 25 percent of the loading times. Reverse‐acting transducers operate in a similar manner except that when the DC input signal increases, the output pressure from the relay decreases. Conversely, a decreasing input signal increases the output pressure. Figure 6.
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Instruction Manual 546 Transducer D200108X012 March 2015 Maintenance Maintenance of the transducer consists of relay repair or replacement, and replacement of the feedback bellows. WARNING The following maintenance procedures require that the transducer be taken out of service. This requires that certain precautions be taken to avoid personal injury or equipment damage caused by sudden release of pressure.
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546 Transducer Instruction Manual March 2015 D200108X012 CAUTION Never disassemble the torque motor assembly because the magnetism in the torque motor magnets will decrease permanently. Shaded key numbers indicate parts that should not be disassembled from the torque motor (see figure 9). If troubleshooting or alignment attempts indicate either a faulty torque motor or the necessity of disassembling the torque motor consult your Emerson Process Management sales office.
PAGE 15
Instruction Manual 546 Transducer D200108X012 March 2015 4. Check the terminal lugs for proper connections. If reverse action of the transducer is observed, simply reverse the input leads as indicated in the Reversing the Action procedures in the Operating Information section. Pneumatic CAUTION Do not attempt to remove the nozzle (key 19, figure 9) for any reason. Nozzle removal requires disassembling the torque motor.
PAGE 16
546 Transducer March 2015 Instruction Manual D200108X012 3. Loosen the four machine screws (key 9, figure 8) that hold the torque motor assembly to the case. Remove the entire torque motor assembly from the case. 4. Loosen the two flexure pivot screws (key 25) that hold the flexure pivot to the torque motor assembly base. 5. Slide the span adjustment assembly in or out as required. Sliding it in toward the base decreases the span; sliding it out away from the base increases the span. 6.
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Instruction Manual 546 Transducer D200108X012 March 2015 Figure 8.
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Instruction Manual 546 Transducer D200108X012 March 2015 Figure 9. Torque Motor Assembly APPLY LUBRICANT/SEALANT NOTES: 1. SHADED KEY NUMBERS INDICATE PARTS THAT SHOULD NOT BE DISASSEMBLED FROM TORQUE MOTOR. 2. KEY NUMBERS 22 AND 103 ARE NOT SHOWN.
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Instruction Manual 546 Transducer D200108X012 March 2015 Figure 10.
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Instruction Manual 546 Transducer D200108X012 March 2015 Mounting Parts (figures 11 & 12) Key Description 82 Cap Screw, steel pl Yoke mounting (4 req'd) 480 all sizes 513 all sizes 656 size 40 thru 60 657 & 667 size 30 thru 80 1051 size 40 & 60 all positions 1052 sizes 40 thru 70 all positions 1061 all sizes all positions Yoke mounting (2 req'd) 585C, all sizes 656, size 30 1250R 1051 size 33 all positions 1052 size 33 all positions Note Part numbers are shown for recomme
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Instruction Manual 546 Transducer D200108X012 March 2015 Figure 11. Typical Actuator Mounting Figure 12.
PAGE 22
546 Transducer March 2015 Diagnostic Connections FlowScannert diagnostic system hook‐up Includes pipe tee, pipe nipple, pipe bushings, connector body, and body protector. See figure 3 for part identification. Note Part numbers are shown for recommended spares only. For part numbers not shown, contact your Emerson Process Management sales office. If the transducer is used in a valve assembly with a positioner, no hook‐up for diagnostic testing is required for the transducer.
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Instruction Manual D200108X012 546 Transducer March 2015 23
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546 Transducer March 2015 Instruction Manual D200108X012 Neither Emerson, Emerson Process Management, nor any of their affiliated entities assumes responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use, and maintenance of any product remains solely with the purchaser and end user. Fisher and FlowScanner are marks owned by one of the companies in the Emerson Process Management business unit of Emerson Electric Co.