Cameron BARTON 289A Bedienungsanleitung
BARTON®NUCLEAR MODEL 289A
DIFFERENTIAL PRESSURE
INDICATING SWITCH
User Manual
Part No. 9A-C10310, Rev. 03
January 2019
Contents
Safety............................................................................................................ 2
Section 1—Introduction................................................................................. 3
General ......................................................................................................... 3
Main Components......................................................................................... 3
Indicating Switch ...................................................................................... 4
Relays ....................................................................................................... 5
Wiring ........................................................................................................ 5
Differential Pressure Unit (DPU) ............................................................... 5
Specications ............................................................................................... 5
Nuclear Qualications ............................................................................... 6
Section 2—Installation................................................................................... 7
General ......................................................................................................... 7
Mounting/Piping/DPU Installation ................................................................. 7
Electrical Connection (Switches/Relays) ...................................................... 7
Switch Use.................................................................................................... 7
Startup .......................................................................................................... 8
Switch and Relay Wiring Diagrams............................................................... 9
Section 3—Maintenance and Calibration................................................... 14
Tools............................................................................................................ 14
Bezel/Lens (or Cover) Installation and Removal......................................... 14
Calibration Check........................................................................................ 15
Pointer Installation and Removal ................................................................ 16
Pointer Installation .................................................................................. 16
Pointer Removal...................................................................................... 16
Indicator Calibration.................................................................................... 17
Drive Arm Tightness Test......................................................................... 19
Drive Arm Stop Adjustment .................................................................... 20
Switch Calibration ..................................................................................... 20
Calibration Setup..................................................................................... 20
Calibration Procedure ............................................................................. 21
2
Safety
Before installing this product, become familiar with the installation instruc-
tions presented in Section 3 and in the Model 199 DPU manual (Appendix A),
and all safety notes throughout.
! WARNING:Thissymbolidentiesinformationaboutpracticesorcircum-
stancesthatcanleadtopersonalinjuryordeath,propertydamage,or
economic loss.
CAUTION: Indicatesactionsorprocedureswhichifnotperformedcorrectly
mayleadtopersonalinjuryorincorrectfunctionoftheinstrument
orconnectedequipment.
IMPORTANT: Indicates actions or procedures which may affect instrument operation or
may lead to an instrument response that is not planned.
Changing Switch Set Point ........................................................................ 22
Denitions of Terms................................................................................. 22
Best Practices for Set Points................................................................... 22
Changing Set Point of an In-Service Instrument (Not Recommended for
Nuclear Qualied Units) .......................................................................... 23
Changing Set Point of an Out-of-Service Instrument .............................. 24
Range Changes ...................................................................................... 24
Parts repalcement....................................................................................25
Troubleshooting ......................................................................................... 26
Section4—AssemblyDrawingandPartsLists......................................... 29
Section5—Installation/DimensionalDrawings ......................................... 35
AppendixA—Model199DPUUserManual...............................................A-1
3
Model 289A Differential Pressure Indicating Switch Section 1
Section 1—Introduction
General
The weatherproof Model 289A is a differential pressure indicating switch.
The Model 289A has a NEMA-4 watertight die-cast aluminum case (nished
with a weather-resistant black epoxy resin paint). The cover lens is secured in
the bezel with an elastomer ring to reduce the possibility of accidental break-
age. This ring also acts as a seal between the bezel and the case to ensure a
moisture, fume and dust-free atmosphere for the indicator and switch mecha-
nism. The large cover lens allows maximum readability of the indicating
pointer.
Switches and all adjustments are readily accessible when the cover is re-
moved.
The built-in switches energize either single or dual alarm circuits when the
measured differential pressures exceed predetermined limits. These limits
may be either maximum, minimum, or both.
MainComponents
Low Alarm
Relay
Plunger
Screw
Switch
Lock
Low Alarm
Switch
Actuating
Cam
High Alarm
Switch
Switch
Lock
Plunger
Screw
Differential
Drive
Arm
High Alarm
Relay
Hex Hub
Zero
Adjust
Switch Link
Movement
Assembly
High Alarm
Switch
Adjust
Range
Adjust
Pointer
Low Alarm
Switch
Adjust
Terminal
Strip
Stop Screw
Stop Screw
Figure 1.1—Switch components
4
Section 1 Model 289A Differential Pressure Indicating Switch
Indicating Switch
(refer to Figure 1.2, Figures 2.1 to 2.6, and Table 2.1)
Rotation of the DPU torque tube shaft is coupled through connecting linkage
within the switch case to move the pointer across the scale plate. An actuat-
ing cam, directly connected to the torque tube shaft, rotates with the motion
of the shaft. Two cam follower roller/actuator arm assemblies, one for each
switch, respond to torque tube rotation by opening and closing the switches as
they ride on and off the cam. The levels of differential pressure at which the
switches actuate are adjustable with high and low alarm switch adjustments
on the scale plate.
RED
YELLOW
BLUE
BLACK
1000
50
Mid-point DP
ORANGE
VIOLET
SWITCH CLOSED
CONTACTS
OPEN
CONTACTS
YELLOW & BLUE RED & YELLOW
VIOLET & ORANGE VIOLET & BLACK
A (LEFT)
B (RIGHT)
1000
50
Zero DP
SWITCH CLOSED
CONTACTS
OPEN
CONTACTS
YELLOW & BLUERED & YELLOW
VIOLET & ORANGE VIOLET & BLACK
A (LEFT)
B (RIGHT)
1000
50
Maximum DP
SWITCH CLOSED
CONTACTS
OPEN
CONTACTS
YELLOW & BLUE RED & YELLOW
VIOLET & ORANGEVIOLET & BLACK
A (LEFT)
B (RIGHT)
BOTH SWITCHES RELAXED
SWITCH “A” ACTUATED/SWITCH “B” RELAXED
SWITCH “A” RELAXED/SWITCH “B” ACTUATED
CAM
SWITCH
PLUNGER
SCREW
SWITCH “A”
(LEFT)
LOW
SWITCH “B”
(RIGHT)
HIGH
TERMINAL
BLOCK IN
CASE
SWITCH “A”
(LEFT)
LOW
SWITCH “B”
(RIGHT)
HIGH
SWITCH “A”
(LEFT)
LOW
SWITCH “B”
(RIGHT)
HIGH
Figure 1.2—Switch actuation example
5
Model 289A Differential Pressure Indicating Switch Section 1
Standard models can have one or two alarm switches. Each switch can be
connected to operate normally-opened or normally-closed. The direct-set
switch contacts are adjustable over a scale range of 5-95% nominal for SPDT
switches and 6-94% for DPDT switches.
The cam rotates counterclockwise with increased pressure. In Figure 1.2, the
low switch is set at 25% differential pressure, and the high switch is set at
75% differential pressure.
Switches are available in several variations.
• SPDT: This is the standard model (low, high, or both)
• DPDT: Two switches are stacked and actuated by a single lever (low,
high, or both)
• Three or four SPDT: Switches have independent switch points.
Switches 1 and 3 are usually low switches set for decreasing pressures;
switches 2 and 4 are usually high switches set for increasing pressures.
Relays
Relays are actuated by internal switches and are available in several varia-
tions:
• one or two SPDT switches
• one or two DPDT switches
Wiring
No. 22 AWG is used for internal wiring and No. 18 AWG is used for external
wiring.
Differential Pressure Unit (DPU)
For detailed information on the DPU, see the Model 199 DPU user manual in
Appendix A.
Specications
General:
Actuating Unit (DPU) ...................... Model 199 DPU
Dial Size ......................................... 6 inches (150 mm)
Temperature Limits (Ambient) ........ -40°F (-40°C) to +180°F (+82°C)
Switch Repeatability ....................... ±0.25% of full scale
Switch Deadband ........................... ±5% (SPDT); ±6% (DPDT)
Switch Type .................................... Mechanical, Snap-Acting; all switches are SPDT
(DPDT switches are stacked SPDT switches with a
common actuator)
Relay Contact Type ........................ Single Pole, Double Throw (SPDT)
Double Pole, Double Throw (DPDT)
Adjustability .................................... 5% to 95% of factory calibrated scale
Activation........................................ Increasing or decreasing scale
6
Section 1 Model 289A Differential Pressure Indicating Switch
Switch Contact Rating:
5.0 Amps @ 125 VAC
5.0 Amps @ 250 VAC, 50/60 Hz1
3.0 Amps @ 30 VDC (resistive)1,2
1.0 Amp @ 30 VDC (inductive with arc suppression)1,2,3
0.4 Amp @ 125 VDC (resistive)
0.2 Amp @ 125 VDC (inductive w/arc suppression)
1. CSA Approved
2. CE Approved (Voltage limited to less than 50 VDC or 35 VAC for CE applications)
3. Arc suppression recommended for inductive loadings
Relay Contact Ratings:
10 Amps @ 150/250 VAC
10 Amps @ 14/28 VDC
1.0 HP @ 208/240 VAC
Relay Coil Voltages:
120 VAC @ 5VA Max.
110 VDC @ 2W Max.
Coil Power Requirement:
DC Relay ........................................ 1.5 Watts
AC Relay ........................................ 2.75 Volt Amps
Accuracy of Indications
Standard (1 or 2 SPDT Switches).....................±1% of factory calibrated span
(10-349 inches wc)
.....................±1.25% of factory calibrated span
(350 inches wc to 115 psig)
1 or 2 DPDT Switches (S401).......................... Add ±1/2% to standard accuracy
Near switch setpoint (±10% full scale) ............. Add ±1/2% to standard accuracy
For suppressed ranges .................................... Add ±1/4% to standard accuracy
3 or 4 SPDT Switches...................................... Add ±3/4% to standard accuracy
Switch Deadband:
SPDT.............................................. ±5% of full scale DP (max)
DPDT.............................................. ±6% of full scale DP (max)
Accuracy of Repeatability............... ±0.25% of full scale DP
Nuclear Qualications
The following nuclear qualication applications are based on Cameron Engineering
Report 9A-CR3-288A-13 with switch chatter sensitivity addressed in Cameron Engineer-
ing Report 9A-CR3-288A-19:
• One or two SPDT switches: Radiation Augmented (3 MRads), Full Functional, 12G,
Mild Environment Applications
• One or two DPDT switches: Structural and Pressure Boundary Integrity Applica-
tions
• One or two relays: Structural and Pressure Boundary Integrity Applications
• Three or four independently adjustable SPDT switches: Structural and Pressure
Boundary Integrity Applications
7
Model 289A Differential Pressure Indicating Switch Section 2
Section 2—Installation
General
The instrument should be inspected at time of unpacking to detect any dam-
age that may have occurred during shipment.
IMPORTANT: The DPU was checked for accuracy at the factory. Do not change any of
the settings during examination or accuracy could be affected.
For applications requiring special cleaning/precautions, a polyethylene bag
is used to protect the instrument from contamination. This bag should be
removed only under conditions of extreme cleanliness.
Mounting/Piping/DPUInstallation
Dimensional drawings are provided in page 35. See the Model 199 DPU
user manual in Appendix A for DPU installation and maintenance informa-
tion.
ElectricalConnection(Switches/Relays)
Units are supplied with either single or dual alarm switches and/or relays
(depending on customer order). The direct-set switch contacts are adjustable
over 5% to 95% of the scale range for SPDT switches and 6% to 94% of the
scale range for DPDT switches.
Table 2.1, page 8, shows switch and relay wiring color coding for legacy
and current congurations. Figures 2.1 through 2.6 show switch and relay
wiring.
The high switch and low switch set point adjustment procedures are covered
in Changing Switch Set Point, page 22.
For physical location of switches, see Figure 1.1, page 3.
SwitchUse
Switch contact life is inuenced by various application conditions such as
temperature, humidity, airborne contamination, vibration, amount of plunger
travel, cycling rate, and rate of plunger travel (and others), as well as by the
electrical (circuit) characteristics.
IMPORTANT: Arc suppression for inductive loads will prolong the life of the switch
contacts.
8
Section 2 Model 289A Differential Pressure Indicating Switch
IMPORTANT: Due to their size, subminiature switches have small mechanical clear-
ances; therefore, no rating above 250 VAC has been established.
Table2.1—Switch/RelayWireColorCoding(4/06c)
289A LEGACY CONFIGURATIONS
(priortoApr.2006) 289A CURRENT CONFIGURATIONS
NO C NC NO C NC
SPDT SWITCHES
Low Red Yellow Blue Red Yellow Blue
High Black Green White Black Violet Orange
DPDT SWITCHES
Low #1 Red Yellow Blue Red Yellow Blue
Low #2 White/Red White/Yellow White/Blue White/Red White/Yellow White/Blue
High #1 Black Green White Black Violet Orange
High #2 White/Black White/Green White/Violet White/Black White/Violet White/Orange
4-INDEPENDENTLY ADJUSTABLE SWITCHES
Low #1 Red Yellow Blue Red Yellow Blue
Low #2 White/Red White/Yellow White/Blue White/Red White/Yellow White/Blue
High #1 Black Green White Black Violet Orange
High #2 White/Black White/Green White/Violet White/Black White/Violet White/Orange
SWITCHES FOR RELAYS
Low Red Yellow Blue (Note 1) White/Brown Brown White (Note 1)
High Black Green White (Note 1) White/Gray Gray White (Note 1)
RELAYS
Low #1 Gray Blue Brown Red Yellow Blue
Low #2 White/Gray White/Blue White/Brown White/Red White/Yellow White/Blue
High #1 Violet White Orange Black Violet Orange
High #2 White/Violet White/Black White/Orange White/Black White/Violet White/Orange
Coil
Wiring:
Legacy Ver.: Low = Red and High = Black Current Ver.: Low = White/Brown and High = White/
Gray
Note 1: Wire is NOT connected.
Startup
For startup procedures, warnings, and other information, refer to the Model
199 DPU user manual in Appendix A.
IMPORTANT: To ensure the unit calibration is within factory-set calibration tolerances,
perform the Calibration Check procedure on page 15.
9
Model 289A Differential Pressure Indicating Switch Section 2
SwitchandRelayWiringDiagrams
IMPORTANT: Figures 2.1 through 2.6 show: switch & relay contacts in the relaxed
(shelf) condition, the low switch set to trip at a position below the pointer
scale position, and the high switch set to trip at a position above the
pointer scale position. NO = Normally Open in (shelf) condition. NC =
Normally Closed in (shelf) condition. C= Common.
HIGH SPDT SWITCH
NOCNC
CASE GROUND
GREEN
ORANGE
VIOLET
BLACK
ORANGE
VIOLET
BLACK
8 9 10
LOW SPDT SWITCH
NO
12 3
C NC
RED
YELLOW
BLUE
RED
CASE GROUND
GREEN
YELLOW
BLUE
LOW & HIGH SPDT SWITCHES
NO NOC CNC NC
RED
YELLOW
BLUE
RED
CASE GROUND
GREEN
YELLOW
BLUE
ORANGE
VIOLET
BLACK
ORANGE
VIOLET
BLACK
1 2 3 4 5 6 7 8 9 10
Figure 2.1—Low/high SPDT switch diagrams
(current conguration color codes - see Table 2.1, page 8)
10
Section 2 Model 289A Differential Pressure Indicating Switch
HIGH DPDT SWITCH
NOCNC NOCNC
ORANGE
VIOLET
BLACK
ORANGE
CASE GROUND
GREEN
VIOLET
BLACK
WHITE/ORANGE
WHITE/VIOLET
WHITE/BLACK
WHITE/ORANGE
WHITE/VIOLET
WHITE/BLACK
5 6 7 8 9 10
LOW DPDT SWITCH
NO C NC NO C NC
RED
YELLOW
BLUE
RED
CASE GROUND
GREEN
YELLOW
BLUE
WHITE/RED
WHITE/YELLOW
WHITE/BLUE
WHITE/RED
WHITE/YELLOW
WHITE/BLUE
1 2 3 4 5 6
LOW & HIGH DPDT SWITCHES
NO C NC NO C NC
RED
YELLOW
BLUE
RED
CASE GROUND
GREEN
YELLOW
BLUE
WHITE/RED
WHITE/YELLOW
WHITE/BLUE
WHITE/RED
WHITE/YELLOW
WHITE/BLUE
1 2 3 4 5 6
NOCNC NOCNC
ORANGE
VIOLET
BLACK
ORANGE
VIOLET
BLACK
WHITE/ORANGE
WHITE/VIOLET
WHITE/BLACK
WHITE/ORANGE
WHITE/VIOLET
WHITE/BLACK
7 8 9 10 11 12
Figure 2.2—Low/high DPDT switch diagrams
(current conguration color codes - see Table 2.1, page 8)
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