Emerson Fisher 546 Instruction Manual
Instruction Manual
D103425X012
546NS Transducer
Fisherr 546NS Electro‐Pneumatic Transducer
April 2015
Contents
Introduction 1.................................
Scope of Manual 1.............................
Description 2.................................
Specifications 3...............................
564NS Qualification 3......................
Educational Services 3.........................
Installation 5..................................
Hazardous Area Classifications 5.................
Mounting 6..................................
Pressure Connections 6........................
Diagnostic Connections 7......................
Electrical Connections 8........................
Operating Information 9.........................
Adjustments 9................................
Calibration 10................................
Equipment Required 10.....................
Calibration Procedure 10....................
Recalibration 11...........................
Changing Output Pressure Range 12.............
Reversing the Action 12........................
Split Range Operation 12.......................
Principle of Operation 13........................
Maintenance 14................................
Relay Removal and Replacement 15..............
Replacing the Feedback Bellows Assembly 15......
Troubleshooting 16............................
Electrical 16..............................
Pneumatic 16.............................
Alignment 17.................................
Span Adjustment 17.......................
Torque Motor Frame 18....................
Armature Travel Stop 18....................
Coil 18...................................
Figure 1. Fisher 546NS Electro‐Pneumatic Transducer
Mounted on a 657 Pneumatic Diaphragm Actuator
FILTER
REGULATOR
546NS
W2115
Parts Ordering 19...............................
Repair Kits 19..................................
Parts List 19...................................
Transducer 19................................
Torque Motor 20..............................
Relay 22.....................................
Mounting Parts 23.............................
Diagnostic Connections 23.....................
Introduction
Scope of Manual
This instruction manual provides installation, operation, maintenance, and parts ordering information for the Fisher
546NS transducer and the 82 relay. Refer to separate manuals for instructions covering equipment used with the
transducer.
www.Fisher.com
546NS Transducer
April 2015
Do not install, operate or maintain a 546NS 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
Business Partner before proceeding.
Instruction Manual
D103425X012
or Local
Description
The 546NS transducer (figure 1) receives a current (mA DC) input signal and transmits a proportional pneumatic
output pressure to a final control element. A typical application is in electronic control loops where the final control
element, generally a control valve, is pneumatically operated. The input signal, output pressure range, and electrical
classification, if approved, of each transducer is indicated on the nameplate attached to the cover.
The 546NS transducer is designed for nuclear power applications. The 546NS construction includes materials that
provide superior performance in elevated temperature and radiation environments.
The O‐rings are EPDM (ethylene propylene) and the diaphragms are EPDM/NOMEXt. EPDM demonstrates superior
temperature capability and shelf life over nitrile. The NOMEX diaphragm fabric demonstrates improved strength
retention at elevated temperature and radiation conditions.
CAUTION
Use a clean, dry, oil‐free air supply with instruments containing EPDM components. EPDM is subject to degradation when
exposed to petroleum‐based lubricants.
Under the 10CFR50, Appendix B, quality assurance program, the 546NS transducer is qualified “commercial grade
dedicated”. These can be supplied as 10CFR, Part 21 items.
2
Instruction Manual
D103425X012
546NS Transducer
April 2015
Specifications
Specifications are listed in table 1.
546NS Qualification
The 546NS is qualified to meet stringent environmental conditions encountered in nuclear power plant containment
areas. Samples were subjected to the tests summarized below:
D Thermal Aging: accelerated service temperature of 54_C (130_F) over 10 years.
D Radiation Aging: 6 MRads Total Integrated Dose (TID)
D Seismic Event Simulation (DBE): no natural frequencies found between 5‐100 Hz and seismic dwells of 8g uniaxial
from 3‐40 Hz.
D LOCA/MSLB Event Simulation: saturated steam for 14 hours at 160_C ( 320_F) followed by a gradual reduction to
83_C (182_F) over a 10 hour period.
Upon conclusion of the above tests, no loss of function or extreme degradation was found.
Educational Services
For information on available courses for the 546NS transducer, as well as a variety of other products, contact:
Emerson Process Management
Educational Services, Registration
Phone: +-1-641-754-3771 or +1-800-338-8158
e-mail: education@emerson.com
http://www.emersonprocess.com/education
3
546NS Transducer
April 2015
Table 1. Specifications
Instruction Manual
D103425X012
Available Configuration
Electro‐pneumatic signal transducer with
explosion‐proof case and cover, with EPDM
elastomers for use in elevated temperature and
radiation environments
The 546NS can be ordered with or without a Fisher 67
filter regulator. A 51 mm (2 inch) circular supply
pressure gauge may be mounted on the regulator.
Input Signals
J 4 to 20 mA DC, J 10 to 50 mA DC, or J two‐way
split range using any half of one of the standard input
signal spans
Internal Resistance of Torque Motor
4 to 20 mA DC Input Signal: 176 ±10 ohms
10 to 50 mA DC Input Signal: 90 ±10 ohms
Output Signals
Ranges:
0.2 to 1.0 bar (3 to 15 psig), 0.4 to 2.0 bar
(6 to 30 psig)
Action: 546NS is field‐reversible between direct and
reverse action.
Supply Pressure
(1)
Recommended: 0.3 bar (5 psig) higher than upper
range limit of output signal
Maximum: 3.5 bar (50 psig)
Performance
(3)
Actuator Loading Time: See figure 6
(4)
Reference Accuracy
: ±0.75% of the output span
Independent Linearity: ±0.50% of the output span
Open Loop Gain: 26
Frequency Response: Gain is attenuated 3 dB at 20 Hz
with transducer output signal piped to a typical
instrument bellows with 305 mm (12 inches) of
1/4 inch tubing
Electromagnetic Interference (EMI): Tested per IEC
61326‐1 (Edition 1.1). Meets emission levels for Class
A equipment (industrial locations) and Class B
equipment (domestic locations). Meets immunity
requirements for industrial locations (Table A.1 in the
IEC specification document). Immunity performance
shown in table 2.
Operative Ambient Temperature Limits
(1)
-40 to 66_C (-40 to +150_F)
Electrical Classification
Hazardous Area:
CSA— Explosion-proof, Dust Ignition‐proof, Div 2
FM— Explosion-proof, Dust Ignition‐proof,
Non‐incendive
Refer to table 3 and 4 for specific approval
information.
NEMA 3R, CSA enclosure 3
NEMA 3R mounting orientation requires vent location
to be below horizontal. Vent is shown in figure 9, key
69.
Maximum Steady‐State Air Consumption
At 1.4 bar (20 psig) Supply Pressure:
0.6 normal m
3
/hr (21 scfh)
At 2.4 bar (35 psig) Supply Pressure:
0.8 normal m
Maximum Output Air Capacity
3
/hr (30 scfh)
(2)
At 1.4 bar (20 psig) Supply Pressure:
3
12.9 normal m
At 2.4 bar (35 psig) Supply Pressure:
18.5 normal m
4
/hr (480 scfh)
3
/hr (690 scfh)
(2)
Adjustments
Zero and Span Adjustments: Screwdriver adjustments
located inside case (see figure 4)
Connections
Supply Pressure: 1/4 NPT internal located on side of
case, (or located on the 67CFR filter‐regulator if
mounted)
Output Pressure: 1/4 NPT internal located on side of
case
Vent: 1/4 NPT internal with screen located on relay
Electrical: 1/2 NPT internal located on bottom of case
-continued-
Instruction Manual
D103425X012
Table 1. Specifications (continued)
546NS Transducer
April 2015
Approximate Weight
4.1 kg (9 pounds)
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.
Declaration of SEP
Fisher Controls International LLC declares this
product to be in compliance with Article 3 paragraph
NOTE: Specialized instrument terms are defined in ANSI/ISA Standard 51.1 - Process Instrument Terminology.
1. The pressure/temperature limits in this document and any applicable standard or code limitation should not be exceeded.
2. Normal m
3. Performance values are obtained using a 546 transducer with a 4 to 20 mA DC input signal and a 0.2 to 1 bar (3 to 15 psig) or a 0.4 to 2 bar (6 to 30 psig) output signal. Ambient temperature
is 24_C (73_F). A transducer with other input or output signals might exceed these values. Reference accuracies of ±3.5% can be expected with output ranges starting near zero psig.
4. Reference accuracy includes the effects of non-linearity, hysteresis, and deadband per SAMA Standard PMC 20.1-1973.
3
/hr—Normal cubic meters per hour (0_C and 1.01325 bar absolute). Scfh—Standard cubic feet per hour (60_F and 14.7 psia).
However, the product may bear the CE marking to
indicate compliance with other applicable European
Community Directives.
Table 2. Electromagnetic Immunity Performance
Port Phenomenon Basic Standard Test Level Performance Criteria
Electrostatic discharge (ESD) IEC 61000‐4‐2
Enclosure
I/O signal/control
Specification limit = ±1% of span
1. A=No degradation during testing. B = Temporary degradation during testing, but is self‐recovering.
Radiated EM field IEC 61000‐4‐3
Rated power frequency magnetic field IEC 61000‐4‐8 60 A/m at 50 Hz A
Burst (fast transients) IEC 61000‐4‐4 1 kV A
Surge IEC 61000‐4‐5 1 kV (line to ground only, each) B
Conducted RF IEC 61000‐4‐6
4 kV contact
8 kV air
80 to 1000 MHz @ 10V/m with 1
kHz AM at 80%
150 kHz to 80 MHz at 3 Vrms with
1kHz AM at 80%
A
A
A
(1)
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.
D If installing into an existing application, also refer to the WARNING at the beginning of the Maintenance section in this
instruction manual.
Hazardous Area Classifications
Certain nameplates may carry more than one approval, and each approval may have unique installation/wiring
requirements and/or conditions of “safe use”. These special instructions for “safe use” are in addition to, and may
override, the standard installation procedures. Special instructions are listed by approval.
5
546NS Transducer
April 2015
Note
This information supplements the nameplate markings affixed to the product.
Always refer to the nameplate itself to identify the appropriate certification. Contact your Emerson Process Management sales
office for approval/certification information not listed here.
Instruction Manual
D103425X012
CSA and FM
No special conditions of safe use.
Refer to table 3 and 4 for approval information.
Table 3. Hazardous Area Classifications—CSA (Canada)
Certification Body Certification Obtained Temperature Code
CSA
Explosion-proof
Class I, Division 1, Group C,D
Class II, Division 1, Groups E,F,G
Class I, Division 2, Groups A,B,C,D
Class II, Division 2, Groups F,G
T5 (Tamb = 66_C)
T5
Table 4. Hazardous Area Classifications— FM (United States)
Certification Body Certification Obtained Temperature Code
FM
Explosion-proof
Class I, Division 1, Groups C,D
Class II, Division 1, Groups E,F,G
Class I, Division 2, Groups A,B,C,D
Class II, Division 2, Groups F,G
T5 (Tamb = 60_C)
T5
Mounting
When a 546NS transducer is ordered as part of a control valve assembly, the factory mounts the transducer on the
actuator and connects the necessary tubing, then adjusts the transducer as specified on the order.
Transducers also can be ordered separately for mounting on a control valve assembly already in service. The
transducer may be ordered with or without mounting parts. Mounting parts include the appropriate bracket and bolts
for attaching the unit to an actuator boss (with tapped holes) or for attaching it to the diaphragm casing. If preferred,
mounting parts are available for mounting the transducer on a 51 mm (2 inch) diameter pipestand, a flat surface, or a
bulkhead.
Tubing is not included if the transducer is not factory mounted. Use 9.5 mm (3/8‐inch) outside diameter tubing for all
supply and output connections. Tubing length between the transducer output and the final control element should be
as short as possible to minimize its effect on control loop stability.
Pressure Connections
WARNING
Severe personal injury or property damage may occur if the instrument air supply is not clean, dry and oil‐free. While use
and regular maintenance of a filter that removes particles larger than 40 micrometers in diameter will suffice in most
applications, check with an Emerson Process Management field office and industry instrument air quality standards for use
with corrosive air or if you are unsure about the proper amount or method of air filtration or filter maintenance.
6
Instruction Manual
D103425X012
546NS Transducer
April 2015
Note
The supply source must be clean, dry, oil‐free, non‐corrosive air at an unfailing pressure at least 0.3 bar (5 psig) higher than the
upper limit of the transducer output pressure range. This means that for an output pressure range of 0.2 to 1.0 bar (3 to 15 psig)
the supply pressure should be at least 1.4 bar (20 psig); for a 0.4 to 2.0 bar (6 to 30 psig) range, the supply pressure should be at
least 2.4 bar (35 psig). The supply pressure to the filter regulator should not be more than 17.3 bar (250 psig) at a maximum
temperature of 66_C (150_F).
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 9.5 mm (3/8‐inch) outside diameter tubing from the 1/4 NPT OUTPUT connection on the transducer case to
the input connection on the pneumatic actuator or valve positioner. This connection is made at the factory if the
unit is shipped mounted on an actuator as shown in figure 1.
Diagnostic Connections
To support diagnostic testing of valve/actuator/positioner packages, special connectors and hardware are available.
Typical connector installations are shown in figure 2. The hardware used includes a 1/4 NPT pipe nipple and pipe tee
with a 1/8 NPT pipe bushing for the connector. The connector consists of 1/8 NPT body and body protector.
Note
If the transducer is used in a valve assembly with a positioner, no connections for diagnostic testing are required for the
transducer. Install the connections for diagnostic testing at the positioner.
Figure 2. Diagnostic Connections
PIPE NIPPLE (OUTPUT CONN)
PIPE TEE
PIPE
BUSHING
BODY
BODY
PROTECTOR
12B8041‐B
A6072‐1
SUPPLY
GAUGE
STEM PROVIDED
WHEN GAUGE
IS SPECIFIED
Install the connectors and hardware between the transducer and the actuator.
1. Before assembling the pipe nipple, pipe tee, pipe bushings, actuator piping, and connector body, apply sealant to
all threads.
2. Turn the pipe tee to position the connector body and body protector for easy access when doing diagnostic testing.
7
546NS Transducer
April 2015
Instruction Manual
D103425X012
Electrical Connections
WARNING
For explosion‐proof applications, disconnect power before removing the transducer cover. Personal injury or property
damage may result from fire or explosion if power is applied to the transducer with the cover removed in a hazardous area.
Also refer to the Warning at the beginning of the Operating Information section.
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). Failure to use properly rated wiring and/or cable glands can result in personal injury or property damage
from fire or explosion.
Wiring connections must be in accordance with local, regional, and national codes for any given hazardous are approval.
Failure to follow the local, regional, and national codes could result in personal injury or property damage from fire or
explosion.
The electrical connections are made in the transducer case. A 1/2 NPT conduit connection is provided in the bottom of
the case. Use a suitable conduit seal for hazardous locations. The wires that carry the input signal from the control
device are connected to the terminal mounting bracket assembly (key 53, figure 8).
For a direct‐acting unit (i.e., increasing current produces an increasing output pressure), connect the positive wire
from the control device to the positive terminal of the transducer and the negative wire to the negative terminal. For a
reverse‐acting unit (i.e., increasing current produces a decreasing output pressure), connect the positive wire from the
control device to the negative terminal and the negative wire to the positive terminal. Typical circuits are shown in
figure 3.
Figure 3. Typical Circuit Drawings
NOTE:
1 DC RESISTANCE OF COILS
CP8401‐B
B1766‐2
+
INPUT
-
DC SIGNAL: 4 TO 20 MILLIAMPS
1
176 OHMS
+
INPUT
-
DC SIGNAL: 10 TO 50 MILLIAMPS
1
90 OHMS
CAUTION
Use a lubricant (key 95, figure 7) on the case‐cover threads to prevent thread damage.
8
Loading...