00809-1100-4004, Rev AC
Rosemount™ 8800D Vortex Flow Meter
For Meters with Pressure Compensation (MPA) or
Pressure+Temperature Compensation (MCA)
Reference Manual
October 2021
2
Reference Manual Contents
00809-1100-4004 October 2021
Contents
Rosemount™ 8800D Vortex Flowmeter................................................................................. 0
Chapter 1 Safety messages.........................................................................................................7
Chapter 2 Introduction.............................................................................................................. 9
2.1 Overview..................................................................................................................................... 9
Chapter 3 Pre-installation........................................................................................................ 11
3.1 Planning.................................................................................................................................... 11
3.2 Commissioning..........................................................................................................................17
Chapter 4 Basic installation...................................................................................................... 21
4.1 Handling....................................................................................................................................21
4.2 Flow direction............................................................................................................................21
4.3 Gaskets......................................................................................................................................21
4.4 Insulation...................................................................................................................................22
4.5 Flanged-style flow meter mounting...........................................................................................22
4.6 Wafer-style flow meter alignment and mounting...................................................................... 24
4.7 Cable glands.............................................................................................................................. 26
4.8 Flow meter grounding............................................................................................................... 26
4.9 Grounding the transmitter case.................................................................................................27
4.10 Conduit installation................................................................................................................. 28
4.11 Wiring......................................................................................................................................28
4.12 Remote installation................................................................................................................. 29
Chapter 5 Basic configuration.................................................................................................. 37
5.1 About basic configuration..........................................................................................................37
5.2 Process variables........................................................................................................................37
5.3 Tag............................................................................................................................................ 39
5.4 Long Tag....................................................................................................................................39
5.5 Process configuration................................................................................................................ 39
5.6 Reference K-factor.....................................................................................................................40
5.7 Flange type................................................................................................................................41
5.8 Pipe I.D...................................................................................................................................... 41
5.9 Upper and lower range values....................................................................................................42
5.10 Damping................................................................................................................................. 42
5.11 Optimize Digital Signal Processing (DSP)................................................................................. 43
Chapter 6 Advanced installation...............................................................................................45
6.1 Insert integral temperature sensor.............................................................................................45
6.2 Pulse output.............................................................................................................................. 46
6.3 Transient protection.................................................................................................................. 47
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6.4 Wire a HART pressure transmitter for pressure compensation................................................... 50
Chapter 7 Advanced configuration...........................................................................................53
7.1 LCD display................................................................................................................................ 53
7.2 Compensated K-factor...............................................................................................................53
7.3 Meter body................................................................................................................................54
7.4 Meter factor...............................................................................................................................54
7.5 Variable mapping...................................................................................................................... 54
7.6 Alarm/saturation levels..............................................................................................................55
7.7 Pulse output.............................................................................................................................. 56
7.8 Mass compensation...................................................................................................................57
7.9 Configure HART pressure transmitter........................................................................................ 62
7.10 SMART fluid diagnostic............................................................................................................ 62
7.11 HART multidrop communication............................................................................................. 64
7.12 Burst mode..............................................................................................................................65
7.13 Optimizing HART systems for pressure compensation.............................................................66
7.14 Signal processing.....................................................................................................................66
7.15 Device information.................................................................................................................. 68
7.16 Change HART revisions............................................................................................................69
7.17 Special process variable units...................................................................................................69
7.18 Elapsed Time Meter................................................................................................................. 70
7.19 Flow totalizer...........................................................................................................................70
7.20 Locate device...........................................................................................................................71
Chapter 8 Troubleshooting...................................................................................................... 73
8.1 Communication problem with HART-based communicator.......................................................73
8.2 Incorrect 4–20 mA output......................................................................................................... 73
8.3 Incorrect pulse output............................................................................................................... 74
8.4 Error messages on a HART-based communicator.......................................................................74
8.5 Flow in Pipe, No Output............................................................................................................. 74
8.6 No flow, output......................................................................................................................... 75
8.7 Diagnostic messages................................................................................................................. 76
8.8 Temperature and pressure compensation troubleshooting....................................................... 81
8.9 Electronics test points................................................................................................................82
Chapter 9 Maintenance............................................................................................................85
9.1 Transient protection.................................................................................................................. 85
9.2 Installing the LCD indicator........................................................................................................86
9.3 Hardware replacement.............................................................................................................. 88
9.4 Return of material....................................................................................................................102
Appendix A Product Specifications............................................................................................105
A.1 Physical specifications............................................................................................................. 105
A.2 Performance specifications......................................................................................................109
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A.3 Typical flow rates.....................................................................................................................114
A.4 HART specifications.................................................................................................................122
A.5 LCD indicator functional specifications.................................................................................... 126
Appendix B Spacers.................................................................................................................. 127
Appendix C Electronics verification........................................................................................... 129
C.1 Electronics verification using flow simulation mode.................................................................129
C.2 Fixed flow rate simulation........................................................................................................130
C.3 Varying flow rate simulation....................................................................................................130
C.4 Verify electronics using an external frequency generator.........................................................130
C.5 Output variable calculations with known input frequency........................................................132
C.6 Unit conversion table...............................................................................................................133
C.7 Example calculations............................................................................................................... 133
Appendix D Dual and Single Analog Wiring Configuration with the HART Communication
Bridge............................................................................................................... 139
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6 Rosemount™ 8800D Vortex Flow Meter with MPA or MCA option
Reference Manual Safety messages
00809-1100-4004 October 2021
1 Safety messages
WARNING
Explosion hazards. Failure to follow these instructions could cause an explosion,
resulting in death or serious injury.
• Verify the operating atmosphere of the transmitter is consistent with the
appropriate hazardous locations certifications.
• Installation of this transmitter in an explosive environment must be in accordance
with the appropriate local, national, and international standards, codes, and
practices. Review the approvals documents for any restrictions associated with a safe
installation.
• Do not remove transmitter covers or thermocouple (if equipped) in explosive
atmospheres when the circuit is live. Both transmitter covers must be fully engaged
to meet explosion-proof requirements.
• Before connecting a hand-held communicator in an explosive atmosphere, make
sure the instruments in the loop are installed in accordance with intrinsically safe or
non-incendive field wiring practices.
WARNING
Electrical shock hazard. Failure to follow this instruction could result in death or serious
injury. Avoid contact with the leads and terminals. High voltage that may be present on
leads can cause electrical shock.
WARNING
General hazard. Failure to follow these instructions could result in death or serious
injury.
• This product is intended to be used as a flowmeter for liquid, gas, or steam
applications. Do not use for any other purpose.
• Make sure only qualified personnel perform the installation.
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8 Rosemount™ 8800D Vortex Flow Meter with MPA or MCA option
Reference Manual Introduction
00809-1100-4004 October 2021
2 Introduction
2.1 Overview
System description
The Vortex Flow Meter consists of a meter body and transmitter, and measures volumetric
flow rate by detecting the vortices created by a fluid passing by the shedder bar.
The meter body is installed in-line with process piping. A sensor is located at the end of the
shedder bar which creates a sine wave signal due to the passing vortices. The transmitter
measures the frequency of the sine wave and converts it into a flow rate.
Safety messages
Procedures and instructions in this manual may require special precautions to ensure the
safety of the personnel performing the operations. Refer to the safety messages listed at
the beginning of this document, before performing any operations.
Chapters
Section Who uses Description
Pre-installation Planners and
installers
Basic installation Planners and
installers
Basic
configuration
Advanced
installation
Advanced
configuration
Operation Operations
Troubleshooting Installers and
Maintenance Operations
Operations
technicians
Installers Installation procedures required after initial setup for
Operations
technicians
technicians
operations
technicians
technicians
Reference information to help you verify compatibility
between the meter and its application and installation
location
Mechanical and electrical installation instructions typically
required as initial setup in all applications
Configuration parameters typically required as initial setup
in all applications
some applications
Configuration procedures required after initial setup for
some applications
Information on advanced configuration parameters and
functions that can aid in maintaining the flow meter
Troubleshooting techniques, diagnostic information, and
transmitter verification procedures
Information on maintaining the flow meter
Appendixes
Appendixes include supplementary information that may be useful in some situations.
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10 Rosemount™ 8800D Vortex Flow Meter with MPA or MCA option
Reference Manual Pre-installation
00809-1100-4004 October 2021
3 Pre-installation
3.1 Planning
3.1.1 Sizing
To determine the correct meter size for optimal flow meter performance:
• Determine the limits of measuring flow.
• Determine the process conditions so that they are within the stated requirements for
Reynolds number and velocity.
For sizing details, see Product Specifications.
Sizing calculations are required to select the proper flow meter size. These calculations
provide pressure loss, accuracy, and minimum and maximum flow rate data to guide in
proper selection. Vortex sizing software can be found using the Selection and Sizing tool.
The Selection and Sizing tool can be accessed online or downloaded for offline use using
this link: www.Emerson.com/FlowSizing.
3.1.2
3.1.3
Wetted material selection
Ensure that the process fluid is compatible with the meter body wetted materials when
specifying the Rosemount 8800D. Corrosion will shorten the life of the meter body.
Consult recognized sources of corrosion data or contact technical support for more
information.
Note
If Positive Material Identification (PMI) is required, perform test on a machined surface.
Orientation
The best orientation for the meter depends on the process fluid, environmental factors,
and any other nearby equipment.
Vertical installation
Vertical, upward, installation allows upward process liquid flow and is generally preferred.
Upward flow ensures that the meter body always remains full and that any solids in the
fluid are evenly distributed.
The meter can be mounted in the vertical down position when measuring gas or steam
flows. This type of application is strongly discouraged for liquid flows, although it can be
done with proper piping design.
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Figure 3-1: Vertical installation
A B
A. Liquid or gas flow
B. Gas flow
Note
To ensure the meter body remains full, avoid downward vertical liquid flows where back
pressure is inadequate.
Horizontal installation
For horizontal installation, the preferred orientation is to have the electronics installed to
the side of the pipe. In liquid applications, this helps prevent any entrained air or solids
from striking the shedder bar and disrupting the shedding frequency. In gas or steam
applications, this helps prevent any entrained liquid (such as condensate) or solids from
striking the shedder bar and disrupting the shedding frequency.
Figure 3-2: Horizontal installation
B
A
A. Preferred installation—meter body installed with electronics to side of pipe
B. Acceptable installation—meter body installed with electronics above pipe
High-temperature installations
The maximum process temperature for integral electronics is dependent on the ambient
temperature where the meter is installed. The electronics must not exceed 185 °F (85 °C).
Figure 3-3 shows combinations of ambient and process temperatures needed to maintain
a housing temperature of less than 185 °F (85 °C).
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Figure 3-3: Ambient/Process temperature limits
200 (93)
180(82)
160 (71)
600 (316)
700 (371)
C
800 (427)
900 (482)
1000 (538)
A
140 (60)
120 (49)
100 (38)
80 (27)
60 (16)
0
100 (38)
200 (93)
300 (149)
400 (204)
500 (260)
B
A. Ambient temperature °F (°C)
B. Process temperature °F (°C)
C. 185 °F (85 °C) Housing temperature limit.
Note
The indicated limits are for horizontal pipe and vertical meter position, with meter and
pipe insulated with 3 in. (77 mm) of ceramic fiber insulation.
Install the meter body so the electronics are positioned to the side of the pipe or below the
pipe as shown in Figure 3-4. Insulation may also be required around the pipe to maintain
an electronics temperature below 185 °F (85 °C). See Figure 4-2 for special insulation
considerations.
Figure 3-4: Examples of high-temperature installations
B
A
A. Preferred installation—The meter body installed with the electronics to the side of the
pipe.
B. Acceptable installation—The meter body installed with the electronics below the pipe.
3.1.4
Location
Hazardous area
The transmitter has an explosion-proof housing and circuitry suitable for intrinsically safe
and non-incendive operation. Individual transmitters are clearly marked with a tag
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indicating the certifications they carry. For hazardous location installation, including
Explosion-proof, Flameproof,or Intrinsic Safety (I.S.), please consult the Emerson 8800
Approval Document 00825-VA00-0001.
Environmental considerations
Avoid excessive heat and vibration to ensure maximum flow meter life. Typical problem
areas include high-vibration lines with integrally mounted electronics, warm-climate
installations in direct sunlight, and outdoor installations in cold climates.
Although the signal conditioning functions reduce susceptibility to extraneous noise,
some environments are more suitable than others. Avoid placing the flow meter or its
wiring close to devices that produce high intensity electromagnetic and electrostatic
fields. Such devices include electric welding equipment, large electric motors and
transformers, and communication transmitters.
Upstream and downstream piping
The meter may be installed with a minimum of ten diameters (D) of straight pipe length
upstream and five diameters (D) of straight pipe length downstream.
To achieve reference accuracy, straight pipe lengths of 35D upstream and 5D downstream
are required. The value of the K-factor may shift up to 0.5% when the upstream straight
pipe length is between 10D and 35D. For optional K-factor corrections, see Rosemount
™
8800 Vortex Installation Effects Technical Data Sheet. To correct this effect, see Meter factor.
Steam piping
For steam applications, avoid installations such as the one shown in the following figure.
Such installations may cause a water-hammer condition at start-up due to trapped
condensation. The high force from the water hammer can stress the sensing mechanism
and cause permanent damage to the sensor.
Figure 3-5: Wrong steam pipe installation
Pressure and temperature transmitter location
When using pressure and temperature transmitters in conjunction with the vortex flow
meter for compensated mass flows, install the transmitter(s) downstream of the vortex
flow meter.
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Figure 3-6: Pressure and temperature transmitter location
C
A
B
D
A. Pressure transmitter
B. Four straight pipe diameters downstream
C. Temperature transmitter
D. Six straight pipe diameters downstream
3.1.5
Power supply
Analog 4–20 mA Power supply
External power supply required. Each transmitter operates on 10.8 VDC to 42 VDC
terminal voltage.
Power consumption
One watt maximum per transmitter.
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5വ
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HART communication
Figure 3-7: HART communication voltage/resistance requirement
Maximum loop resistance is determined by the voltage level of the external power supply,
as described in the graph.
Note that HART Communication requires a minimum loop resistance of 250 ohms up to a
maximum of 1100 ohms.
R(Ω)
V
ps
Load resistor value.
Minimum power supply voltage required
R(Ω)max = 41.7 (Vps – 10.8 V).
Additional wiring information
• The DC power supply should provide power with less than two percent ripple. The total
resistance load is the sum of the resistance of the signal wiring and the load resistance
of the controller, indicator, and related pieces. Note that the resistance of intrinsic
safety barriers, if used, must be included.
• If a Smart Wireless THUM™ Adapter is being used with the flow meter to exchange
information via IEC 62591 (WirelessHART® Protocol) technology, a minimum loop
resistance of 250 ohms is required. In addition, a minimum power supply voltage (Vps)
of 19.3 volts will be required to output 24 mA.
• If a single power supply is used to power more than one transmitter, the power supply
used and circuitry common to the transmitters should not have more than 20 ohms of
impedance at 1200 Hz. See Table 3-1.
• Loop resistance must be considered in determining the minimum power supply
voltage.
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Table 3-1: Resistance based on wire gauge
Gauge number Ohms per 1,000 ft (305 m) at 68 °F (20 °C)
equivalent
14 AWG (2 mm2) 2.5
16 AWG (1 mm2) 4.0
18 AWG (0.8mm2) 6.4
20 AWG (0.5 mm2) 10
22 AWG (0.3 mm2) 16
24 AWG (0.2 mm2) 26
3.2 Commissioning
For proper configuration and operation, commission the meter before putting it into
operation. Bench commissioning also enables you to check hardware settings, test the
flowmeter electronics, verify flowmeter configuration data, and check output variables.
Any problems can be corrected—or configuration settings changed—before going out into
the installation environment. To commission on the bench, connect a configuration
device to the signal loop in accordance the device instructions.
3.2.1
Alarm and security jumper configuration
Two jumpers on the transmitter specify the alarm and security modes. Set these jumpers
during the commissioning stage to avoid exposing the electronics to the plant
environment. The two jumpers can be found on the electronics board stack or on the LCD
display.
Alarm
Security
To access the jumpers, remove the transmitter electronics housing or the LCD cover (if
equipped) opposite of the terminal block, See Figure 3-8 and Figure 3-9.
As part of normal operations, the transmitter continuously runs a selfdiagnostic routine. If the routine detects an internal failure in the electronics,
flow meter output is driven to a low or high alarm level, depending on the
position of the failure mode jumper. The factory sets the jumper according to
the Configuration Data Sheet, if applicable, or HI by default.
You can protect the configuration data with the security lockout jumper. With
the security lockout jumper ON, any configuration changes attempted on the
electronics are disallowed. You can still access and review any of the operating
parameters and scroll through the available parameters, but no changes can
be made. The factory sets the jumper according to the Configuration Data
Sheet, if applicable, or OFF by default.
Note
If you will be changing configuration variables frequently, it may be useful to
leave the security lockout jumper in the OFF position to avoid exposing the
flow meter electronics to the plant environment.
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Figure 3-8: Alarm and security jumpers (no LCD option)
VORTEX
4-20mA
HART
TP1
TEST FREQ
IN
Figure 3-9: Alarm and security jumpers (with LCD option)
HI LO
HI LO
ALARM
ALARM
FLOW
SECURITY
SECURITY
ON OFF
ON OFF
Failure mode vs. saturation output values
The failure mode alarm output levels differ from the output values that occur when the
operating flow is outside the range points. When the operating flow is outside the range
points, the analog output continues to track the operating flow until reaching the
saturation value listed below; the output does not exceed the listed saturation value
regardless of the operating flow. For example, with standard alarm and saturation levels
and flows outside the 4–20 mA range points, the output saturates at 3.9 mA or 20.8 mA.
When the transmitter diagnostics detect a failure, the analog output is set to a specific
alarm value that differs from the saturation value to allow for proper troubleshooting. The
saturation and alarm levels are software selectable between Rosemount Standard and
NAMUR levels.
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Table 3-2: Analog output: standard alarm values vs. saturation values
Level 4–20 mA saturation value 4–20 mA alarm value
Low 3.9 mA ≤ 3.75 mA
High 20.8 mA ≥ 21.75 mA
Table 3-3: Analog output: NAMUR-compliant alarm values vs. saturation values
Level 4–20 mA saturation value 4–20 mA alarm value
Low 3.8 mA ≤ 3.6 mA
High 20.5 mA ≥ 22.6 mA
3.2.2 Calibration
The flow meter is wet-calibrated at the factory and needs no further calibration during
installation. The calibration factor (K-factor) is indicated on each meter body and is
entered into the electronics. Verification can be accomplished with a configuration device.
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Reference Manual Basic installation
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4 Basic installation
4.1 Handling
Handle all parts carefully to prevent damage. Whenever possible, transport the system to
the installation site in the original shipping containers. Keep the shipping plugs in the
conduit connections until you are ready to connect and seal them.
NOTICE
To avoid damage to the meter, do not lift the flow meter by the transmitter. Lift the meter
by the meter body. Lifting supports can be tied around the meter body as shown.
Figure 4-1: Lifting supports
4.2 Flow direction
The meter can only measure flow in the direction indicated on the meter body. Be sure to
mount the meter body so the FORWARD end of the flow arrow points in the direction of
the flow in the pipe.
4.3 Gaskets
The flow meter requires gaskets supplied by the user. Be sure to select gasket material
that is compatible with the process fluid and pressure ratings of the specific installation.
Note
Ensure the inside diameter of the gasket is larger than the inside diameter of the flow
meter and adjacent piping. If gasket material extends into the flow stream, it will disturb
the flow and cause inaccurate measurements.
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4.4 Insulation
Insulation should extend to the end of the bolt on the bottom of the meter body and
should leave at least 1-in. (25 mm) of clearance around the electronics bracket. The
electronics bracket and electronics housing should not be insulated. See Figure 4-2.
Figure 4-2: Insulation best practice to prevent electronics overheating
A. Support tube
CAUTION
In high temperature installations, to avoid damage to the electronics on integral units or
to the remote cable on remote units, only insulate the meter body as shown. Do not
insulate the support tube. See also Orientation.
4.5 Flanged-style flow meter mounting
Most vortex flow meters use a flanged-style process connection. Physical mounting of a
flanged-style flow meter is similar to installing a typical section of pipe. Conventional
tools, equipment, and accessories (such as bolts and gaskets) are required. Tighten the
nuts following the sequence shown in Figure 4-4.
Note
The required bolt load for sealing the gasket joint is affected by several factors, including
operating pressure and gasket material, width, and condition. A number of factors also
affect the actual bolt load resulting from a measured torque, including condition of bolt
threads, friction between the nut head and the flange, and parallelism of the flanges. Due
to these application-dependent factors, the required torque for each application may be
different. Follow the guidelines outlined in ASME PCC-1 for proper bolt tightening. Make
sure the flow meter is centered between flanges of the same nominal size and rating as
the flow meter.
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Figure 4-3: Flanged-style flow meter installation
A. Installation studs and nuts (supplied by customer)
B. Gaskets (supplied by customer)
C. Flow
Figure 4-4: Flange bolt torquing sequence
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4.6 Wafer-style flow meter alignment and mounting
Center the wafer-style meter body inside diameter with respect to the inside diameter of
the adjoining upstream and downstream piping. This will ensure the flow meter achieves
its specified accuracy. Alignment rings are provided with each wafer-style meter body for
centering purposes. Follow these steps to align the meter body for installation. Refer to
Figure 4-5.
1. Place the alignment rings over each end of the meter body.
2. Insert the studs for the bottom side of the meter body between the pipe flanges.
3. Place the meter body (with alignment rings) between the flanges.
• Make sure the alignment rings are properly placed onto the studs.
• Align the studs with the markings on the ring that correspond to the flange you
are using.
• If a spacer is used, see Spacers.
Note
Be sure to align the flow meter so the electronics are accessible, the conduits drain,
and the flow meter is not subject to direct heat.
4. Place the remaining studs between the pipe flanges.
5. Tighten the nuts in the sequence shown in Figure 4-4.
6. Check for leaks at the flanges after tightening the flange bolts.
Note
The required bolt load for sealing the gasket joint is affected by several factors,
including operating pressure and gasket material, width, and condition. A number
of factors also affect the actual bolt load resulting from a measured torque,
including condition of bolt threads, friction between the nut head and the flange,
and parallelism of the flanges. Due to these application-dependent factors, the
required torque for each application may be different. Follow the guidelines
outlined in ASME PCC-1 for proper bolt tightening. Make sure the flow meter is
centered between flanges of the same nominal size and rating as the flow meter.
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Figure 4-5: Wafer-style flow meter installation with alignment rings
B
B
A
4.6.1
C
D
A. Installation studs and nuts (supplied by customer)
B. Alignment rings
C. Spacer (for Rosemount 8800D to maintain Rosemount 8800A dimensions)
D. Flow
Note
See Spacers for instructions on retrofitting 8800D to 8800A installations.
Stud bolts for wafer-style flow meters
The following tables list the recommended minimum stud bolt lengths for wafer-style
meter body size and different flange ratings.
Table 4-1: Stud bolt length for wafer-style flow meters with ASME B16.5 flanges
Line size Minimum recommended stud bolt lengths (in inches) for each flange
rating
Class 150 Class 300 Class 600
½-inch 6.00 6.25 6.25
1-inch 6.25 7.00 7.50
1½-inch 7.25 8.50 9.00
2-inch 8.50 8.75 9.50
3-inch 9.00 10.00 10.50
4-inch 9.50 10.75 12.25
6-inch 10.75 11.50 14.00
8-inch 12.75 14.50 16.75
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Table 4-2: Stud bolt length for wafer-style flow meters with EN 1092 flanges
Line size Minimum recommended stud bolt lengths (in mm) for each flange rating
PN 16 PN 40 PN 63 PN 100
DN 15 160 160 170 170
DN 25 160 160 200 200
DN 40 200 200 230 230
DN 50 220 220 250 270
DN 80 230 230 260 280
DN 100 240 260 290 310
DN 150 270 300 330 350
DN 200 320 360 400 420
Line size Minimum recommended stud bolt lengths (in mm) for each flange
rating
JIS 10k JIS 16k and 20k JIS 40k
15mm 150 155 185
25mm 175 175 190
40mm 195 195 225
50mm 210 215 230
80mm 220 245 265
100mm 235 260 295
150mm 270 290 355
200mm 310 335 410
4.7 Cable glands
If you are using cable glands instead of conduit, follow the cable gland manufacturer’s
instructions for preparation and make the connections in a conventional manner in
accordance with local or plant electrical codes. Be sure to properly seal unused ports to
prevent moisture or other contamination from entering the terminal block compartment
of the electronics housing.
4.8 Flow meter grounding
Grounding is not required in typical vortex applications; however, a proper ground will
eliminate possible noise pickup by the electronics. Grounding straps may be used to
ensure that the meter is grounded to the process piping. If you are using the transient
protection option (T1), grounding straps are required to provide a proper low impedance
ground.
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Note
Properly ground flow meter body and transmitter per the local code.
To use grounding straps, secure one end of the grounding strap to the bolt extending from
the side of the meter body and attach the other end of each grounding strap to a suitable
ground. See Figure 4-6.
Figure 4-6: Grounding connections
A. Internal ground connection
B. External ground assembly
4.9 Grounding the transmitter case
The transmitter case should always be grounded in accordance with national and local
electrical codes. The most effective transmitter case grounding method is direct
connection to earth ground with minimal impedance. Methods for grounding the
transmitter case include:
Internal
Ground
Connection
External
Ground
Assembly
Note
Grounding the transmitter case using the threaded conduit connection may not provide a
sufficient ground. The transient protection terminal block (Option Code T1) does not
provide transient protection unless the transmitter case is properly grounded. For
transient terminal block grounding, see Transient protection. Use the above guidelines to
The Internal Ground Connection screw is inside the FIELD TERMINALS
side of the electronics housing. This screw is identified by a ground
symbol ( ), and is standard on all Rosemount 8800D transmitters.
This assembly is located on the outside of the electronics housing and
is included with the optional transient protection terminal block
(Option Code T1). The External Ground Assembly can also be ordered
with the transmitter (Option Code V5) and is automatically included
with certain hazardous area approvals. See Figure 4-6 for the location
of the external ground assembly.
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ground the transmitter case. Do not run the transient protection ground wire with signal
wiring as the ground wire may carry excessive electric current if a lightning strike occurs.
4.10 Conduit installation
Prevent condensation in any conduit from flowing into the housing by mounting the
flowmeter at a high point in the conduit run. If the flowmeter is mounted at a low point in
the conduit run, the terminal compartment could fill with fluid.
If the conduit originates above the flowmeter, route conduit below the flowmeter to form
a drip loop before entry. In some cases a drain seal may need to be installed.
Figure 4-7: Proper conduit installation
A A
A. Conduit line
4.11 Wiring
The signal terminals are located in a compartment of the electronics housing separate
from the flow meter electronics. Connections for a configuration tool and an electric
current test connection are above the signal terminals.
Note
A power disconnect is required to remove power from the transmitter for maintenance,
removal, and replacement.
Common wiring practices
Twisted pairs are required to minimize noise pickup in the 4–20 mA signal and digital
communication signal. For high EMI/RFI environments, shielded signal wire is required and
recommended in all other installations. To ensure communication, wiring should be 24
AWG (0.205 mm²) or larger, and not exceed 5,000 ft (1500 m).
4.11.1
Analog output
The flow meter provides a 4–20 mA dc isolated electric current output, linear with the flow
rate or optionally the Process Temperature with the MCA option. To make connections,
remove the FIELD TERMINALS side cover of the electronics housing. All power to the
electronics is supplied over the 4–20 mA signal wiring. Connect the wires as shown.
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Figure 4-8: 4–20 mA wiring
A. Power supply. See Power supply.
4.12 Remote installation
4.12.1
If a remote electronics option (Rxx or Axx) was ordered, the flow meter assembly will be
shipped in two parts:
• The meter body with an adapter installed in the support tube and an interconnecting
coaxial cable attached to it.
• The electronics housing installed on a mounting bracket.
If an armored remote electronics option (Axx) was ordered, follow the same instructions as
for the standard remote cable connection with the exception that the cable may not need
to be run through conduit. Both standard and armored cable include cable glands.
Information on remote installation can be found in Cable connections.
Mounting
Mount the meter body in the process flow line as described earlier in this section. Mount
the bracket and electronics housing in the desired location. The housing can be
repositioned on the bracket to facilitate field wiring and conduit routing.
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4.12.2 Cable connections
Complete these steps for connecting the loose end of the coaxial cable to the electronics
housing. If connecting/disconnecting the meter adapter to the meter body, see Remote
electronics procedures.
Figure 4-9: Remote installation
A
B
C
D
E
F
G
H
P
O
N
J
K
I
M
L
A. ½ NPT conduit adapter or cable gland (supplied by customer for Rxx options)
B. Coaxial cable
C. Meter adapter
D. Union
E. Washer
F. Nut
G. Sensor cable nut
H. Support tube
I. Meter body
J. Electronics housing
K. Coaxial cable SMA nut
L. ½ NPT conduit adapter or cable gland (supplied by customer for Rxx options)
M. Housing adapter screws
N. Housing adapter
O. Housing base screw (one of four)
P. Ground connection
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CAUTION
To prevent moisture from entering the coaxial cable connections, install the
interconnecting coaxial cable in a single dedicated conduit run or use sealed cable
glands at both ends of the cable.
In remote mount configurations when ordered with a hazardous area option code, the
remote sensor cable and the interconnecting thermocouple cable are protected by
separate intrinsic safety circuits, and must be segregated from each other, other
intrinsically safe circuits, and non-intrinsically safe circuits per local and national wiring
code.
CAUTION
The coaxial remote cable cannot be field terminated or cut to length. Coil any extra
coaxial cable with no less than a 2-in. (51 mm) radius.
1. If you plan to run the coaxial cable in conduit, carefully cut the conduit to the
desired length to provide for proper assembly at the housing. A junction box may
be placed in the conduit run to provide a space for extra coaxial cable length.
2. Slide the conduit adapter or cable gland over the loose end of the coaxial cable and
fasten it to the adapter on the meter body support tube. If coaxial remote cable
originates or any part of the cable is above the flow meter, route cable below the
flow meter to form a drip loop before the meter body support tube.
3. If using conduit, route the coaxial cable through the conduit.
4. Place a conduit adapter or cable gland over the end of the coaxial cable.
5. Remove the housing adapter from the electronics housing.
6. Slide the housing adapter over the coaxial cable.
7. Remove one of the four housing base screws.
8. Attach the coaxial cable ground wire to the housing via the housing base ground
screw.
9. Attach and hand tighten the coaxial cable SMA nut to the electronics housing to 7
in-lbs (0.8 N-m).
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Figure 4-10: Attaching and tightening SMA nut
A
B
A. SMA nut
B. Hand tighten
Note
Do not over-tighten the coaxial cable nut to the electronics housing.
4.12.3
10. Align the housing adapter with the housing and attach with two screws.
11. Tighten the conduit adapter or cable gland to the housing adapter.
Housing rotation
The entire electronics housing may be rotated in 90° increments for easy viewing. Use the
following steps to change the housing orientation,
1. Loosen the three accessible housing rotation set screws at the base of the
electronics housing with a 5/32” hex wrench by turning the screws clockwise
(inward) until they clear the support tube.
2. Slowly pull the electronics housing out of the support tube.
CAUTION
Do not pull the housing more than 1.5 in. (40 mm) from the top of the support
tube until the sensor cable is disconnected. Damage to the sensor may occur if
this sensor cable is stressed.
3. Unscrew the sensor cable from the housing with a 5/16” open end wrench.
4. Rotate the housing to the desired orientation.
5. Hold it in this orientation while you screw the sensor cable onto the base of the
housing.
CAUTION
Do not rotate the housing while the sensor cable is attached to the base of the
housing. This will stress the cable and may damage the sensor.
6. Place the electronics housing into the top of the support tube.
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7. Use a hex wrench to turn the three accessible housing rotation screws counter-
clockwise (outward) to engage the support tube.
4.12.4 Specifications and requirements for remote sensor cable
If using a Rosemount remote sensor cable, observe these specifications and requirements.
• The remote sensor cable is a proprietary design tri-axial cable
• It is considered a low voltage signal cable
• It is rated for and/or part of intrinsically safe installations
• Non armored version is designed to be run through metal conduit
• Cable is water resistant, but not submersible. As a best practice, exposure to moisture
should be avoided if possible
• Rated operating temperature is –58°F to +392°F (–50°C to +200°C)
• Flame Resistant in accordance with IEC 60332-3
• Non-armored and armored version minimum bend diameter is 8 inches (203 mm)
• Nominal O.D. of the non-armored version is 0.160 inches (4 mm)
• Nominal O.D. of the armored version is 0.282 inches (7.1 mm)
Figure 4-11: Non-armored cable
A. Transmitter end
B. Sensor end
C. Minimum bend diameter
D. Nominal O.D.
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Figure 4-12: Armored cable
A. Transmitter end
B. Sensor end
C. Minimum bend diameter
4.12.5
Quad transmitter numbering and orientation
When quad vortex flow meters are ordered, for configuration purposes, the transmitters
are identified as Transmitter 1, Transmitter 2, Transmitter 3, and Transmitter 4. The
transmitter and meter body nameplate of a Quad Vortex flow meter can be used to
identify and verify the transmitter number. See Figure 4-13 for Quad transmitter
orientation and nameplate locations. See Figure 4-14 and 4-15 for Quad transmitter and
meter body nameplate number location.
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Figure 4-13: Quad transmitter numbering
A. Transmitter nameplate (Transmitter 1)
B. Meter body nameplate (Transmitter 1)
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Figure 4-14: Quad transmitter nameplate
Figure 4-15: Quad meter body nameplate
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5 Basic configuration
5.1 About basic configuration
The transmitter must be configured for certain basic variables in order to be operational.
In most cases, all of these variables are pre-configured at the factory. Configuration may
be required if your transmitter is not configured or if the configuration variables need
revision. The basic setup section includes parameters typically required for basic
operation.
5.2 Process variables
Process variables define the flow meter output. When commissioning a flow meter, review
each process variable, its function and output, and take corrective action if necessary
before using the flow meter in a process application.
5.2.1
5.2.2
Primary variable mapping
Allows the user to select which variables the transmitter will output.
ProLink III
Note
The Primary Variable is also the Analog Output variable.
Flow variables are available as Corrected Volume Flow, Mass Flow, Velocity Flow, Volume
Flow or Process Temperature (MTA or MCA option only).
When bench commissioning, the flow values for each variable should be zero and the
temperature value should be the ambient temperature.
If the units for the flow or temperature variables are not correct, refer to Process variable
units. Use the Process Variable Units function to select the units for your application.
Device Tools → Configuration → Communications (HART)
Process variable units
ProLink III Device Tools → Configuration → Process Measurement →
(select type)
Allows for the viewing and configuration of Process Variable Units such as Volume,
Velocity, Mass Flow, Electronics Temperature, Process Density, and Corrected Volume
units, including corrected volume Special Units configuration.
Volume flow units
Allows the user to select the volumetric flow units from the available list.
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Table 5-1: Volume flow units
gallons per second gallons per minute gallons per hour
gallons per day cubic feet per second cubic feet per minute
cubic feet per hour cubic feet per day barrels per second
barrels per minute barrels per hour barrels per day
imperial gallons per second imperial gallons per minute imperial gallons per hour
imperial gallons per day liters per second liters per minute
liters per hour liters per day cubic meters per second
cubic meters per minute cubic meters per hour cubic meters per day
mega cubic meters per day special units
Corrected volumetric flow units
Allows the user to select the corrected volumetric flow units from the available list.
Table 5-2: Corrected volume flow units
gallons per second gallons per minute gallons per hour
gallons per day cubic feet per second standard cubic feet per minute
standard cubic feet per hour cubic feet per day barrels per second
barrels per minute barrels per hour barrels per day
imperial gallons per second imperial gallons per minute imperial gallons per hour
imperial gallons per day liters per second liters per minute
liters per hour liters per day normal cubic meters per
minute
normal cubic meters per hour normal cubic meters per day cubic meters per second
cubic meters per minute cubic meters per hour cubic meters per day
special units
Note
When measuring corrected volumetric flow, a base density and process density must be
provided. The base density and process density are used to calculate the density ratio
which is a value used to convert actual volume flow to corrected volume flow.
Mass flow units
Allows the user to select the mass flow units from the available list. (1 STon = 2000 lb; 1
MetTon = 1000 kg)
Table 5-3: Mass flow units
grams per hour grams per minute grams per second
kilograms per day kilograms per hour kilograms per minute
kilograms per second pounds per minute pounds per hour
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Table 5-3: Mass flow units (continued)
pounds per day special units short tons per day
short tons per hour short tons per minute pounds per second
tons (metric) per day tons (metric) per hour tons (metric) per minute
Note
If you select a Mass Flow Units option, you must enter process density in your
configuration.
Velocity flow units
Allows the user to select the Velocity Flow Units from the available list.
• feet per second
• meters per second
Velocity measurement base
Determines if the velocity measurement is based on the mating pipe ID or the meter body
ID. This is important for Reducer™ Vortex Applications.
5.3 Tag
ProLink III Device Tools → Configuration → Informational Parameters →
Transmitter
The quickest way to identify and distinguish between flow meters. Flow meters can be
tagged according to the requirements of your application. The tag may be up to eight
characters long.
5.4 Long Tag
ProLink III Device Tools → Configuration → Informational Parameters →
Transmitter
Available for HART 7 and allows for up to 32 characters.
5.5 Process configuration
ProLink III Device Tools → Configuration → Device Setup
The flow meter can be used for liquid, gas, or steam applications, but it must be
configured specifically for the application. If the flow meter is not configured for the
proper process, readings will be inaccurate. Select the appropriate process configuration
parameters for your application:
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Set process fluid
Select the fluid type - either Liquid, Gas, or Steam.
For more information on pressure and temperature compensation configuration, see
Advanced configuration.
Fixed process temperature
Needed for the electronics to compensate for thermal expansion of the flowmeter as the
process temperature differs from the reference temperature. Process temperature is the
temperature of the process in the line during flowmeter operation.
May also be used as a back-up temperature value in the event of a temperature sensor
failure on an MCA meter.
Fixed process density
A Fixed Process Density must be accurately configured if mass flow or corrected volume
flow measurements are used. In mass flow it is used to convert volume flow to mass flow.
In corrected volume flow it is used with the base process density to derive a density ratio
which in turn is used to convert volume flow to corrected volume flow. In temperature
compensated fluids the fixed process density is still required as it is used to convert
volume flow sensor limits to sensor limits for temperature compensated fluids.
Note
If mass or corrected volume units are chosen, you must enter the density of your process
fluid into the software. Be careful to enter the correct density. The mass flow rate and
density ratio are calculated using this user-entered density, and unless actual
Compensation reads Temperature, Pressure or Pressure and Temperature Compensation.
If Actual Compensation reads Temperature, Pressure or Pressure and Temperature
Compensation, density is automatically compensated, any error in the user-entered
density will result in error in the measurement.
Base process density
The density of the fluid at base conditions. This density is used in corrected volume flow
measurement. It is not required for volume flow, mass flow, or velocity flow. The Base
Process Density is used with the Process Density to calculate the Density Ratio. In
temperature compensated fluids, the Process Density is calculated by the transmitter. In
non-temperature compensated fluids the Fixed Process Density is used to calculate a fixed
Density Ratio. Density Ratio is used to convert actual volumetric flow to standard
volumetric flow rates based on the following equation:
Density ratio = density at actual (flowing) conditions/density at standard (base) conditions
5.6 Reference K-factor
ProLink III Device Tools → Configuration → Device Setup
A factory calibration number relating the flow through the meter to the shedding
frequency measured by the electronics. Every vortex meter manufactured by Emerson is
run through a water calibration to determine this value.
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5.7 Flange type
ProLink III Device Tools → Configuration → Device Setup
Enables the user to specify the type of flange on the flow meter for later reference. This
variable is preset at the factory but can be changed if necessary.
Table 5-4: Flange types
Wafer ASME 150 ASME 150 Reducer
ASME 300 ASME 300 Reducer ASME 600
ASME 600 Reducer ASME 900 ASME 900 Reducer
ASME 1500 ASME 1500 Reducer ASME 2500
ASME 2500 Reducer PN10 PN10 Reducer
PN16 PN16 Reducer PN25
PN25 Reducer PN40 PN40 Reducer
PN64 PN64 Reducer PN100
PN100 Reducer PN160 PN160 Reducer
JIS 10K JIS 10K Reducer JIS 16K/20K
JIS 16K/20K Reducer JIS 40K JIS 40K Reducer
Special (Spcl)
5.8 Pipe I.D.
ProLink III Device Tools → Configuration → Device Setup
The pipe I.D. (inside diameter) of the pipe adjacent to the flow meter can cause entrance
effects that may alter flow meter readings. Configuring the actual mating pipe inside
diameter will correct for theses effects. Enter the appropriate value for this variable.
Pipe I.D. values for schedule 10, 40, and 80 piping are given in the following table. If the
mating pipe I.D. is not listed in the table, confirm it with the manufacturer or measure it
yourself.
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Table 5-5: Pipe IDs for Schedule 10, 40, and 80 piping
Pipe size inches (mm) Schedule 10 inches
(mm)
½ (15) 0.674 (17,12) 0.622 (15,80) 0.546 (13,87)
1 (25) 1.097 (27,86) 1.049 (26,64) 0.957 (24,31)
1½ (40) 1.682 (42,72) 1.610 (40,89) 1.500 (38,10)
2 (50) 2.157 (54,79) 2.067 (52,50) 1.939 (49,25)
3 (80) 3.260 (82,80) 3.068 (77,93) 2.900 (73,66)
4 (100) 4.260 (108,2) 4.026 (102,3) 3.826 (97,18)
6 (150) 6.357 (161,5) 6.065 (154,1) 5.761 (146,3)
8 (200) 8.329 (211,6) 7.981 (202,7) 7.625 (193,7)
10 (250) 10.420 (264,67) 10.020 (254,51) 9.562 (242,87)
12 (300) 12.390 (314,71) 12.000 (304,80) 11.374 (288,90)
Schedule 40 inches
(mm)
5.9 Upper and lower range values
ProLink III Device Tools → Configuration → Outputs → Analog Output
Enables you to set the upper and lower range values in order to maximize the resolution of
the analog output. The meter is most accurate when operated within the expected flow
ranges for your application. Setting the range to the limits of expected readings will
maximize flow meter performance.
Schedule 80 inches
(mm)
The range of expected readings is defined by the Lower Range Value and Upper Range
Value. Set the values within the limits of flow meter operation as defined by the line size
and process material for your application. Values set outside that range will not be
accepted.
Upper Range
Value
Lower Range
Value
5.10 Damping
ProLink III Device Tools → Configuration → Outputs → Analog Output
Damping changes the response time of the flow meter to smooth variations in output
readings caused by rapid changes in input. Damping is applied to the Analog Output,
Primary Variable, Percent of Range, and Vortex Frequency.
The default damping value is 2.0 seconds. This can be configured to any value between 0.2
to 255 seconds when PV is a flow variable or 0.4 to 32 seconds when PV is Process
Temperature. Determine the appropriate damping setting based on the necessary
This is the 20 mA set point for the meter.
This is the 4 mA set point for the meter, and is typically set to 0 when
the primary variable is a flow variable.
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response time, signal stability, and other requirements of the loop dynamics in your
system.
Note
If the vortex shedding frequency is slower than the damping value selected, no damping is
applied. Process Temperature damping can be modified when PV is set to Process
Temperature.
5.11 Optimize Digital Signal Processing (DSP)
ProLink III Device Tools → Configuration → Process Measurement →
Signal Processing
A function that can be used to optimize the range of the flow meter based on the density
of the fluid. The electronics uses process density to calculate the minimum measurable
flow rate, while retaining at least a 4:1 signal to the trigger level ratio. This function will
also reset all of the filters to optimize the flow meter performance over the new range. If
the configuration of the device has changed, this method should be executed to ensure
the signal processing parameters are set to their optimum settings. For dynamic process
densities, select a density value that is lower than the lowest expected flowing density.
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6 Advanced installation
6.1 Insert integral temperature sensor
Follow these steps to install the integral temperature sensor, if equipped.
1. The temperature sensor is coiled and attached to the electronics bracket. Remove
the Styrofoam around the sensor and insert the temperature sensor into the hole at
the bottom of the meter body.
There is no need to remove the opposite end from the electronics.
2. Insert temperature sensor into the hole in the bottom of meter body until it reaches
the bottom of the hole.
Figure 6-1: Temperature sensor assembly for inserting into meter body
3. If any part of the temperature sensor cable is above the horizontal plane of where
the temperature sensor enters the transmitter, route the sensor cable below the
flow meter to form a drip loop.
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4. Hold the temperature sensor in place and tighten the bolt with a ½ inch (13 mm)
open end wrench until it reaches ¾ turns past finger tight. Do not over-tighten.
5. Verify that the insulation extends to the end of the bolt on the bottom of the meter
body. Leave at least 1 inch (25 mm) clearance around the electronics bracket.
The meter body should be insulated to achieve stated temperature accuracy. The
electronics bracket and electronics housing should not be insulated. See Insulation.
CAUTION
Do not loosen or remove the temperature connection at the electronics when the
housing integrity needs to be maintained.
6.2 Pulse output
Note
When using the pulse output, all power to the electronics is still supplied over the 4–20
mA signal wiring.
The flowmeter provides an isolated transistor switch-closure frequency output signal
proportional to flow, as shown in the following figure. The frequency limits are as follows:
• Maximum frequency = 10000 Hz
• Minimum frequency = 0.0000035 Hz (1 pulse/79 hours)
• Duty cycle = 50%
• External supply voltage (Vs): 5 to 30 V dc
• Load Resistance (RL): 100 Ω to 100 kΩ
• Max switching current = 100 mA ≥ VS/RL
• Switch closure: transistor, open collector
The output may drive an externally powered electromechanical or electronic totalizer, or
may serve as a direct input to a control element.
In the following example, the pulse output will maintain a 50 percent duty cycle for all
frequencies.
Figure 6-2: Example: Pulse output
A. 50% duty cycle
46 Rosemount™ 8800D Vortex Flow Meter with MPA or MCA option
+
-
A
RL>250 Ω
−
B
+
-
100 Ω < RL< 100 kΩ
−−
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6.2.1 Wire the pulse output
• Shielded twisted pair is required when the pulse output and 4–20 mA output are run in
the same conduit or cable trays. Shielded wire will also reduce false triggering caused
by noise pickup. Wiring should be 24 AWG (0.2 mm2) or larger and not exceed 5,000 ft.
(1500 m).
• Do not connect the powered signal wiring to the test terminals. Power could damage
the test diode in the test connection.
• Do not run signal wiring in conduit or open trays with power wiring, or near heavy
electrical equipment. If needed, ground signal wiring at any one point on the signal
loop, such as the negative terminal of the power supply. The electronics housing is
grounded to the meter body.
• If the flowmeter is protected by the optional transient protector, you must provide a
high-current ground connection from the electronics housing to earth ground. Also,
tighten the housing ground screw in the bottom of the terminal block to provide a
good ground connection.
• Plug and seal all unused conduit connections on the electronics housing to avoid
moisture accumulation in the terminal side of the housing.
• If the connections are not sealed, mount the flowmeter with the conduit entry
positioned downward for drainage. Install wiring with a drip loop, making sure the
bottom of the drip loop is lower than the conduit connections or the electronics
housing.
1. To connect the wires, remove the FIELD TERMINALS side cover of the electronics
housing.
2. Connect the wires as shown in the following figure.
Figure 6-3: 4–20 mA and pulse wiring with electronic totalizer/counter
A. Power supply
B. Power supply with counter
6.3 Transient protection
The optional transient terminal block prevents damage to the flowmeter from transients
induced by lightning, welding, heavy electrical equipment, or switch gears. The transient
protection electronics are located in the terminal block.
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IEEE C62.41 - 2002 Category B
The transient terminal block was verified using the following test waveforms specified in
the IEEE C62.41 - 2002 Category B standard:
• 3 kA crest (8 X 20 ms)
• 6 kV crest (1.2 X 50 ms)
• 6 kV/0.5 kA (0.5 ms, 100 kHz, ring wave)
6.3.1 Installing or replacing the transient protection
For flowmeters ordered with the transient protector option (T1), the protector is shipped
installed.
The transient protection kit includes the following:
• One transient protection terminal block assembly
• Three captive screws
When purchased separately from the transmitter, install the protector using a small
instrument screwdriver, a pliers, and the transient protection kit.
1. If the flowmeter is installed in a loop, secure the loop and disconnect power.
2. Remove the field terminal side flowmeter cover.
3. Remove the captive screws.
Refer to the following figure.
4. Remove the housing ground screw.
5. Use pliers to pull the terminal block out of the housing.
6. Inspect the connector pins for straightness.
7. Place the new terminal block in position and carefully press it into place.
The terminal block may have to be moved back and forth to get the connector pins
started into the sockets.
8. Tighten the captive screws.
9. Install and tighten the ground screw.
10. Replace the cover.
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B
C
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Figure 6-4: Transient Terminal Block
A. Housing ground screw
B. Captive screws
C. Transient terminal block ground tab
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6.4 Wire a HART pressure transmitter for pressure compensation
When the vortex meter is ordered with either the MPA or MCA option, the transmitter is
capable of catching a pressure input from a HART pressure transmitter and utilizing the
pressure input for pressure compensated mass flow.
• The MPA option can be used for pressure compensated mass flow for saturated steam.
• The MCA option can be used for:
— pressure compensated mass flow for saturated steam, or
— pressure and temperature compensated mass flow for superheated steam
6.4.1
Wiring configurations
There are multiple wiring possibilities to utilize a pressure input from a pressure
transmitter for pressure compensation with the vortex meter. Figure 6-5 is a guide to the
appropriate wiring configuration for the application.
Figure 6-5: HART Communication Bridge wiring decision tree
Is
variable
No
Use Fixed
Analog
See Dual and Single Analog Wiring Configuration with the HART Communication Bridge
for Dual and Single analog wiring information.
Fixed analog
analog output
required?
Yes
Use Dual
Analog
Yes
Is an
AI channel
available for
both devices?
No
Use Single
Analog
Fixed-analog wiring configuration provides the capability for the vortex meter to receive
the pressure input from a HART pressure transmitter by wiring multiple devices in parallel.
This is a great solution when a variable analog output is not required from either device,
analog output is not used for control, low power remote, or totalizing applications.
Note
A HART communication bridge is NOT required with this wiring configuration.
Follow these steps to properly wire the flow meter and pressure transmitter:
1. Configure both devices with different non-zero HART addresses.
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Note
Configuring a HART 5 device with a non-zero HART address will result in a fixed
output of 4 mA; Configuring a HART 7 device with a non-zero HART address may
permit a choice between a fixed output and loop current varying with the Primary
Variable.
2. Configure the pressure transmitter to burst its Primary Variable.
3. Connect the devices as shown in Figure 6-6.
Figure 6-6: Fixed analog flow and pressure wiring
A
DC
B
C
A. Vortex transmitter
B. Pressure transmitter
C. Power supply
Note
Use a common 250 to 1k ohm resistor for HART communication
Note
The flow meter cannot be in burst mode. Two bursting transmitters in a parallel
wiring will result in collisions on the HART segment and prevent the flow meter
from receiving the pressure value.
Please refer to Mass compensation for more information on Optimizing HART systems for
pressure compensation
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7 Advanced configuration
Advanced configuration options are used to configure the flow meter for a wider range of
applications and special situations.
7.1 LCD display
ProLink III Device Tools → Configuration → Display Variables
The LCD display (option M5) provides local indication of the output and abbreviated
diagnostic messages governing operation of the flow meter. You can select any of the
following variables to be displayed, where at least one must be selected:
• Primary Variable
• Percent of Range
• Loop Current
• Totalizer Value
• Shedding Frequency
• Mass Flow
• Velocity Flow
• Volume Flow
• Process Temperature (MCA option with Temperature Mode enabled)
• Calculated Process Density (MCA option with Temperature Mode enabled)
• Process Pressure (Pressure Mode enabled)
• Pulse Frequency
• Shedding Frequency
• Electronics Temperature
• Signal Strength
• Corrected Volume Flow
• Elapsed Time Meter (meters with ETM option)
7.2 Compensated K-factor
ProLink III Device Tools → Configuration → Device Setup
The compensated K-factor is based on the reference K-factor as compensated for the
given process temperature, wetted materials, body number, and pipe ID. Compensated Kfactor is an informational variable that is calculated by the electronics of the flow meter.
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The reference K-factor is factory set and is displayed on the support tube label. The
reference K-factor should only be re-configured in the device in the event of transmitter
replacement. Contact technical support for details.
7.3 Meter body
ProLink III Device Tools → Configuration → Informational Parameters →
Meter Body
Meter body parameters are factory-set configuration variables that indicate the physical
and manufacturing properties of the flow meter. These parameters need not be changed
unless the transmitter is being configured in the field for use with a different meter body
than originally configured.
Wetted Material
Flange Type
Meter Body
Serial Number
Body Number
Suffix
The meter body material that is in contact with the process.
The sensor flange type and rating.
The manufacturer's unique identification number for the sensor.
A number + letter or a number with no letter on the right side of the
meter body tag indicating the construction of the meter.
Number + letter "A" or number only
Number + letter "B"
7.4 Meter factor
Compensates the flowmeter for installation effects such as those caused by less than ideal
straight run piping. See the reference graphs in the Technical Data Sheet
(00816-0100-3250) on Installation Effects for the percent of K-factor shift based on entrance
effects of upstream disturbances. This value is entered as a flow multiplication factor of
the range of 0.8 to 1.2.
7.5 Variable mapping
Allows the user to select which variables the transmitter will output.
Welded meter construction
Cast meter construction
ProLink III
Primary Variable
Note
The Primary Variable is also the Analog Output variable.
The Primary Variable can be either Corrected Volume Flow, Mass Flow, Velocity Flow, or
Volume Flow or Process Temperature. When bench commissioning, the flow values for
each variable should be zero and the temperature value should be the ambient
temperature.
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Device Tools → Configuration → Communications (HART)
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If the units for the flow or temperature variables are not correct, refer to Process variable
units. Use the Process Variable Units function to select the units for your application.
Secondary Variable
Selections for the secondary variable can be set to any of the following:
• Cold Junction Temperature (MCA option with Temperature Mode enabled)
• Totalizer Value
• Shedding Frequency
• Mass Flow
• Velocity Flow
• Volume Flow
• Process Temperature (MCA option with Temperature Mode enabled)
• Calculated Process Density (MCA option with Temperature Mode enabled or Pressure
Mode enabled)
• Process Pressure (Pressure Mode enabled)
• Pulse Frequency
• Electronics Temperature
• Signal Strength
• Corrected Volume Flow
• Elapsed Time Meter (meters with ETM option)
Third variable
Selections for the Third Variable are identical to those of the Secondary Variable.
Fourth variable
Selections for the Fourth Variable are identical to those of the Secondary Variable.
7.6 Alarm/saturation levels
ProLink III Device Tools → Configuration → Alarm/Saturation Levels
Alarm
Direction
Alarm Level
This is a read only parameter that indicates the Alarm Direction jumper
setting. See Alarm and security jumper configuration.
Specifies whether the Analog Output alarm values conform to NAMUR
or Rosemount standards. See Failure mode alarm levels. The High Alarm,
High Saturation, Low Saturation, and Low Alarm configuration read only
parameters reflect the Alarm Level selection.
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Table 7-1: Analog output: standard alarm values vs. saturation values
Level 4–20 mA saturation value 4–20 mA alarm value
Low 3.9 mA ≤ 3.75 mA
High 20.8 mA ≥ 21.75 mA
Table 7-2: Analog output: NAMUR-compliant alarm values vs. saturation values
Level 4–20 mA saturation value 4–20 mA alarm value
Low 3.8 mA ≤ 3.6 mA
High 20.5 mA ≥ 22.6 mA
7.7 Pulse output
ProLink III Device Tools → Configuration → Outputs → Pulse Output
Pulse output can be configured using the configuration tool guided setups.
Note
Configuration of the pulse features is allowed even if the pulse option (Option P) was not
ordered.
The flow meter comes with an optional pulse output option (P). This enables it to output
the pulse rate to an external control system, totalizer, or other device. If the flow meter
was ordered with the pulse mode option, it may be configured for either pulse scaling
(based on rate or unit) or shedding frequency output.
There are several options for configuring the pulse output:
• Off
• Direct (Shedding Frequency)
• Scaled Volume
• Scaled Velocity
• Scaled Mass
• Scaled Corrected Volumetric
Note
In order to totalize in compensated mass flow, set pulse output to Scaled Mass even if the
pulse output was not ordered or will not be used.
Direct (shedding)
This mode provides the vortex shedding frequency as output. In this mode, the software
does not compensate the K-factor for effects such as thermal expansion or differing
mating pipe inside diameters. Scaled pulse mode must be used to compensate the Kfactor for thermal expansion and mating pipe effects.
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Scaled volumetric
This mode allows for configuration of the pulse output based on a volumetric flow rate.
For example, set 100 gallons per minute = 10,000 Hz. (The user enterable parameters are
flow rate and frequency.)
Scaled corrected volumetric
This mode allows for configuration of the pulse output based on a corrected volumetric
flow rate.
Scaled velocity
This mode allows for configuration of the pulse output based on a velocity flow rate.
Scaled mass
This mode allows for configuration of the pulse output based on a mass flow rate if Actual
Mass Compensation is Temperature Compensation.
When one of the scaled outputs is selected, choose one of two options:
Pulse scaling
based on flow
rate
Pulse scaling
based on flow
unit
Allows the user to set a certain flow rate to a desired frequency. For
example: 1000 lbs/hr = 1000HZ
• Enter a flow rate of 1000 lbs/hr.
• Enter a frequency of 1000Hz.
Allows the user to set one pulse equal to a desired volume, mass,
corrected volume, or distance. For example: 1 pulse = 1000lbs.
• Enter 1000 for the mass.
7.7.1 Pulse Loop Test
Pulse Loop Test is a fixed frequency mode test that checks the integrity of the pulse loop. It
tests that all connections are good and that pulse output is running on the loop.
Note
The Pulse Loop Test will not check for valid pulse scaling configuration. It will set a
frequency without consideration of the pulse scaling configuration.
7.8 Mass compensation
The transmitter can dynamically compensate for changes in fluid density to provide
accurate compensated mass flow measurement. Depending on how the flow meter is
ordered and/or licensed, it can measure mass flow using temperature and/or pressure
compensation with the following options.
Temperature Compensation
The flow meter ordered with the MCA option code is equipped with a built in temperature
sensor that communicates directly to the transmitter electronics. It can be used for
saturated steam, water, or other liquids with known densities at given temperatures.
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To use temperature compensation, set Desired Compensation to Temperature
Compensation.
Saturated
Steam
Water
User
defined
liquid
To compensate for changes of density based on temperature in saturated
steam applications, Set Fluid Type to Steam. This enables dynamic density
compensation while measuring mass flow or corrected volumetric flow
using built-in steam tables.
To compensate for changes of density based on temperature in water
applications:
• Set Fluid Type to Liquid
• Set Temperature Compensated Liquid to Water
• Set Fixed Process Pressure to the approximate value of the process
pressure
Entering fixed process pressure enables dynamic density compensation
while measuring mass flow or corrected volumetric flow using the built-in
water density calculations per IAPWS-IF97.
To compensate for changes of density based on temperature in liquid
applications other than water:
• Set Fluid Type to Liquid
• Set Temperature Compensated Liquid to User Defined
• Enter between 2 and 5 temperature and density points of ascending
temperature. The temperature and density points enable dynamic
density compensation while measuring mass flow or corrected
volumetric flow for a user defined liquid.
Note
The lower and upper limit of the temperature points is –40 °F (–40 °C)
and 842 °F (450 °C).
Gas
Temperature compensation is not available for gas fluid types.
The transmitter will use the internal measured temperature measurement from the
integrated temperature sensor for density calculations. If the temperature sensor fails, the
transmitter can continue to provide a compensated mass flow measurement using a fixed
temperature value. See Thermocouple Failure for more information.
Pressure compensation
The flow meter can receive a pressure input from a HART-based pressure transmitter and
use it for a pressure compensated mass flow measurement. This can be used for saturated
steam applications. To use pressure compensation, ensure that Desired Compensation is
set to Pressure.
Saturated Steam
To compensate for changes of density based on pressure in saturated
steam applications, Set Fluid Type to Steam. This enables dynamic
density compensation.
Liquid or Gas
Pressure compensation is not available for liquid and gas fluid types.
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The transmitter will use the pressure value received from an external HART pressure
transmitter for density calculations. If communication or the pressure sensor fails, the
transmitter can continue to provide a compensated mass flow measurement using a fixed
pressure value. See External Pressure Failure Mode for more information.
Pressure and temperature compensation
The flow meter ordered with the MCA option code can compensate for pressure and
temperature. The flow meter is equipped with a temperature sensor and can receive a
pressure input from a HART pressure transmitter. With pressure and temperature
compensation, it is possible to measure mass flow in superheated steam applications. To
utilize pressure and temperature compensation, set Desired Compensation to Pressure
and Temperature Compensation.
Superheated
Steam
Liquid or Gas
The transmitter will use the pressure value received from an external HART pressure
transmitter and the internal measured temperature measurement from the integrated
temperature sensor for density calculations.
The transmitter will use the internal measured temperature measurement from the
integrated temperature sensor for density calculations. If the temperature sensor fails, the
transmitter can continue to provide a compensated mass flow measurement using a fixed
temperature value. See Thermocouple Failure for more information.
If communication or the pressure sensor fails, the transmitter can continue to provide a
compensated mass flow measurement using a fixed pressure value. See External Pressure
Failure Mode for more information.
If the temperature measurement is lower than the saturated temperature based on the
external pressure measurement value, the transmitter will use the density based on the
external pressure and saturated temperature value to provide a compensated mass flow
rate and provide an alert. When process temperature is higher than the saturated
temperature based on the external pressure measurement value, the transmitter will
revert to using process temperature for density calculations and the alert will be cleared.
To compensate for changes of density based on pressure and
temperature in superheated steam applications, set Fluid Type to
Steam. This enables dynamic density compensation while measuring
mass flow or corrected volumetric flow by using built-in steam tables.
Pressure and temperature compensation is not available for liquid and gas
fluid types.
7.8.1
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Temperature settings
Temperature Mode
When Enable is selected, the process temperature is measured. The temperature value
obtained from the temperature sensor, can be used as the primary variable and/or
temperature compensation for mass or corrected volumetric mass flow when Actual
Compensation is Temperature Compensated or Pressure and Temperature Compensated
is shown. When Disable is selected, the temperature sensor, if equipped, will be ignored.
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Fixed Process Temperature and Fixed Process Temperature Units
Specify the approximate process temperature and units. This value is used primarily to
compensate for thermal expansion of the meter body, even if temperature compensation
is not being used. It can also be used for temperature compensation, if specified in the
Measurement Compensation settings, in the event of a temperature sensor or input
failure.
Electronics Temperature Units and Electronics Temperature Units
Electronics Temperature is a read-only informational/diagnostic value for which you can
specify the preferred unit of measurement.
Temperature Damping
Increasing Temperature Damping setting effectively slows the response time to the
temperature measurement. The default value is 2 seconds.
Thermocouple Failure
Choose what the transmitter should do in the event of a thermocouple failure. Selecting
Go To Alarm will send the unit into Alarm mode. Selecting Use Fixed Process
Temperature will allow the use of the value of Fixed Process Temperature to be used as
the temperature input. The meter will also output a HART alert.
7.8.2
Pressure settings
Note
Pressure settings are only available for meters ordered with the MPA or MCA option.
Pressure Mode
Selecting External will enable the capability for the transmitter to obtain a process
pressure reading from a pressure transmitter via HART communication. The pressure
value obtained via HART can be used as the second, third or fourth variable. It can also be
used for pressure compensation for mass or corrected volumetric flow when Actual
Compensation is Pressure Compensated or Pressure and Temperature Compensated is
shown. When Disable is selected, the ability to obtain a pressure input is turned off.
Pressure Input Source
Selecting Catch will enable pressure compensation mass flow through the use of an
external HART pressure transmitted for a pressure input. Selecting None will disable the
ability to use a pressure input for a pressure compensated mass flow measurement.
External Pressure
Digital value that represents the pressure measurement that is received through an
external HART pressure device. This a read-only variable.
Stale Data Detection
Specify the number of seconds that are allowed to pass between pressure readings from
the pressure transmitter before they are deemed stale. If the time between pressure
readings exceed the number of seconds specified, External Pressure Failure Mode will be
enabled.
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Pressure Measurement Type
Choose Absolute or Gauge pressure according to the type of pressure measurement
being taken by the pressure transmitter. If Gauge pressure is selected, Atmospheric
Pressure and Atmospheric Reference Pressure Units must be specified.
Fixed Process Pressure
Specify the approximate process pressure value. This value is used for pressure
compensation when the time between pressure readings exceeds the number of seconds
specified in Stale Data Detection and External Pressure Failure Mode is set to Use Fixed
Process Pressure.
External Pressure Failure Mode
This mode defines the behavior when the time in between pressure readings have
exceeded the value for Stale Data Detection. Selecting Go To Alarm will send the unit into
Alarm mode. Selecting Use Fixed Process Pressure will allow the use of the value of Fixed
Process Pressure to be used as the pressure input. The meter will also output a HART alert.
7.8.3
Mass compensation general settings
The Mass Compensation general settings should be the starting place for configuring any
mass flow compensation because they affect availability of other settings.
Process Fluid
Choose between liquid or steam.
Desired
Compensation
Actual
Compensation
Example Desired and Actual Compensation selections
Saturated Steam with
Tcomp
The user selection for Desired Compensation is validated by the
transmitter according to the current temperature and pressure
compensation settings and licensing, as configured. If the desired
compensation method is valid.
Actual Compensation, which is read-only, will reflect the same
compensation type. If the Actual Compensation shows something
different from the Desired Compensation, one or more of the
temperature, pressure, process fluid, or licensing settings needs to
be corrected for the Desired Compensation to be valid.
Temperature mode - Enabled
Pressure mode - N/A
Desired Compensation - Temp comp
Actual Compensation - Temp comp
Superheated Steam
with P+T comp
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Temperature Mode - Enabled
Pressure Mode - Enabled
Desired Compensation - Pressure and Temperature
compensation
Actual Compensation - Pressure and Temperature
compensation
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7.8.4 Superheat diagnostics
Note
Superheat diagnostics applies only to meters ordered with the MCA option code.
ProLink III Device Tools → Configuration → Process Measurement →
Signal Processing
Superheat Diagnostics allows for an alert and/or alarm to activate when the difference of
the measured process temperature and the saturated temperature at the process pressure
value drops below the Superheat Threshold value.
Superheat Diagnostics is available if the flow meter is equipped with the MCA option code,
Fluid Type is Steam,both Pressure and Temperature Modes have been enabled and Actual
Compensation is Pressure and Temperature Compensation.
The limit range for the Superheat Threshold is 9 °F to 180 °F (5 °C to 100 °C). The default
value is 9 °F (5 °C).
7.9 Configure HART pressure transmitter
When using a pressure transmitter for compensated mass flow measurement, ensure that
the HART PV is set to pressure.
Note
See Wire a HART pressure transmitter for pressure compensation for more information.
7.10 SMART fluid diagnostic
ProLink III Device Tools → Configuration → Process Measurement →
Signal Processing
CAUTION
Due to unpredictable flow conditions and multiple potential failure modes in a process
piping system, the SMART Fluid Diagnostic should not be used as a fail-safe alert when
the transition from liquid to gas represents a safety hazard.
Alerts users when the fluid flow changes from liquid flow to gas flow. This is useful in oil
and gas separator applications where stuck dump valves may allow gas to pass through
the water leg and eventually into storage tanks. The diagnostic will alert users when gas
begins flowing through the water leg. Additionally, the diagnostic can be used in blow
down cycles where air, nitrogen, or steam are used to clear pipes. Once the liquid has been
cleared, the meter will detect gas flow and the user can use that alert to properly time
blow down cycles.
The SMART Fluid Diagnostic uses several application specific parameters to allow users to
fine-tune functionality to their installation. Additionally, the diagnostic is available as a trial
for 30 days on all equipped transmitters.
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Control
Enables user to turn the SMART Fluid Diagnostic Functionality ON or OFF. Default is OFF
unless configured for SMART Fluid Diagnostic from the factory.
Alarm Type
Enables user to select the alarm type. The alarm types are Analog, Pulse, Analog and Pulse,
and Neither Analog or Pulse. This is the output that the transmitter will use to send the
alarm when the meter detects a change from liquid to gas flow. In order to use the pulse
output alarm, the transmitter must be equipped with the pulse output option. The default
setting is Neither Analog or Pulse.
Analog Alarm
If the output type selected includes Analog, then the output level chosen here will be used
for the alarm. The valid range is 3.5–22.65 mA. Default is 21.75 mA.
Pulse Alarm
If the output type selected includes pulse, then the output frequency you choose here will
be used for the alarm. The valid range is 1–10,000 Hz. Default is 1 Hz.
Alarm Latch
Dictates the behavior of the alarm once gas flow is detected. If Alarm Latch is Enabled, the
alarm will continue until the user resets the alarm manually (using a HART communication
device such as AMS Device Manager, or a handheld communicator). When Disabled, the
alarm will stop once liquid flow is detected by the transmitter, at which time the meter will
continue normal operation. The default is Disabled.
Optimize Gas Detection Filters
Once the gas density has been determined, optimize the gas detection filters. This
consists of two parts. The first is setting the gas density and second is setting the gas
detection window.
The gas density value must be selected from a list of densities. This will be used to set the
detection filters for the gas flow. Choose the value from the drop down that is the closest
to the process gas density without exceeding it. Default value is 0.15 lb/cu ft. After filter
optimization, it is best practice to verify that your gas detection low flow cutoff is above
your highest expected liquid flow rate frequency.
The Gas Detection window specifies how long the meter will look for a gas flow event after
the meter stops detecting liquid flow. Under typical conditions, the transition takes place
quickly; however, if the transition is slow, then a longer window may be required. The
acceptable range of values is 1 to 9 seconds and the default value is 1 second.
SMART Fluid Diagnostic Trial
The SMART Fluid Diagnostic can be used on a trial basis for 30 days following activation of
the trial. The trial period can be activated by entering 8800 in the license field. To
permanently activate the diagnostic following the trial, contact an Emerson representative
(see back page) to obtain an activation code.
Rosemount™ 8800D Vortex Flow Meter with MPA or MCA option 63
A
B
RS-232-C
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7.11 HART multidrop communication
Multidropping refers to the connection of several transmitters to a single communication
transmission line. Communication occurs digitally between a HART-based communicator
or control system and the devices. Multidrop mode automatically deactivates the analog
output of the transmitters. Using the HART communication protocol, up to 15
transmitters can be connected on a single twisted pair of wires or over leased phone lines.
The use of a multidrop installation requires consideration of the update rate necessary
from each device, the combination of device models, and the length of the transmission
line. Multidrop installations are not recommended where intrinsic safety is a requirement.
Communication with the devices can be accomplished with commercially available Bell
202 modems and a host implementing the HART protocol. Each device is identified by a
unique address (0–15 for HART version 5 or 0–63 for HART version 7) and responds to the
commands defined in the HART protocol.
The following figure shows a typical multidrop network. This figure is not intended as an
installation diagram. Contact Emerson with specific requirements for multidrop
applications.
Figure 7-1: Typical multidrop network
A. Bell 202 Modem
B. Power Supply
Note
The vortex transmitter is set to poll address zero at the factory, allowing it to operate in
the standard point-to-point manner with a 4–20 mA output signal. To activate multidrop
communication, the transmitter poll address must be changed to a number between 1
and 15. This change deactivates the 4–20 mA analog output, setting it to 4 mA, and
disables the failure mode alert signal.
Poll address
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Enables configuration of the poll address for a multidropped meter. The poll address is
used to identify each meter on the multidrop line. Follow the on-screen instructions to set
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the address at a number from 0 to 15. HART 7 allows an address range of 0 to 63. To set or
change its address, establish communication with the selected flow meter in the loop.
Auto poll
When a HART-based communicator is powered up and auto polling is on, the
communicator automatically polls the flow meter addresses to which it is connected. If
the address is 0, the HART-based communicator enters its normal Online mode. If it
detects an address other than 0, the communicator finds each device in the loop and lists
them by poll address and tag. Scroll through the list and select the meter with which you
need to communicate.
If Auto Poll is off, the flow meter must have the poll address set to 0 or the flow meter will
not be found. Additionally, if a single connected device has an address other than zero and
auto polling is off, the device will not be found.
7.12 Burst mode
ProLink III Device Tools → Configuration → Communications (HART)
Burst Mode configuration
The transmitter supports HART burst mode, which broadcasts the primary variable or all
dynamic variables approximately three to four times a second. HART verson 7 devices
offer enhanced burst mode capabilities including the ability to broadcast variable status,
the ability to broadcast up to 8 variables, and the ability to trigger messages based on
variable events or at defined values.
Note
Only one device on a HART segment can be in Burst mode. For example, if pressure
compensation (via the MPA or MCA option) is used with a pressure transmitter in Burst
mode the vortex flow meter transmitter must not use Burst mode.
The Burst Mode variable enables you to set the burst mode to the needs of your
application. Options for the burst mode setting include:
Off
Turns off the burst mode so that no data are broadcast on the loop.
On
Turns burst mode on so that the data selected under Burst Option are broadcast
over the loop.
Additional command options may appear that are reserved and do not apply to the
Rosemount 8800D.
Burst option
The burst option selects the variables to broadcast over the loop:
PV
Percent Range/
Current
Process vars/crnt
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Selects the primary variable for broadcast over the loop.
Selects the primary variable as percent of range and analog
output current for broadcast over the loop.
Selects the primary variables and analog output current for
broadcast over the loop.
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Dynamic Vars
Xmtr Vars
Burst all dynamic variables in the transmitter.
Allows the user to define custom burst variables.
7.13 Optimizing HART systems for pressure compensation
After the flow meter is completely set up and running, you can try turning off Burst Mode
to determine whether the system is actively reading the pressure process variable using
Command 1 frequently enough to avoid Stale Data Detection.
7.14 Signal processing
ProLink III Device Tools → Configuration → Process Measurement
The transmitter can filter out noise and other frequencies from the vortex signal. The four
user-alterable parameters associated with the digital signal processing include low-pass
filter corner frequency, low-flow cutoff, trigger level, and damping. These four signal
conditioning functions are configured at the factory for optimum filtering over the range
of flow for a given line size, service type (liquid or gas), and process density. For most
applications, leave these parameters at the factory settings. Some applications may
require adjustment of the signal processing parameters.
Use signal processing only when recommended in the troubleshooting section of this
manual. Some of the problems that may require signal processing include:
• High output (output saturation)
• Erratic output with or without flow present
• Incorrect output (with known flow rate)
• No output or low output with flow present
• Low total (missing pulses)
• High total (extra pulses)
If one or more of these conditions exist, and you have checked other potential sources (Kfactor, service type, lower and upper range values, 4–20 mA trim, pulse scaling factor,
process temperature, pipe ID), refer to Troubleshooting. If problems persist after signal
processing adjustments, contact an Emerson representative (see back page).
Optimize DSP (Digital Signal Processing)
Used to optimize the range of the flow meter based on the density of the fluid. The
electronics uses process density to calculate the minimum measurable flow rate, while
retaining at least a 4:1 signal to the trigger level ratio. This function will also reset all of the
filters to optimize the flow meter performance over the new range. For a stronger signal,
select a density value that is lower than the actual flowing density. For dynamic process
densities, select a density value that is lower than the lowest expected flowing density.
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Signal strength
Variable that indicates the flow signal strength to trigger level ratio. This ratio indicates if
there is enough flow signal strength for the meter to work properly. For accurate flow
measurement, the value should be greater than 4. Values greater than 4 will allow
increased filtering for noisy applications. For values greater than 4, with sufficient density,
the Optimize DSP function can be utilized to optimize the measurable range of the flow
meter.
Values less than 4 may indicate applications with very low densities and/or applications
with excessive filtering.
Manual filter adjust
Allows for manual adjustment of the following settings: Low Flow Cutoff, Low Flow Cutoff
Response, Low Pass Corner Frequency, and Trigger Level, while monitoring flow and or
signal strength.
Low flow cutoff
Enables the adjustment of the filter for noise at no flow. It is set at the factory to handle
most applications, but certain applications may require adjustment either to expand
measurability or to reduce noise.
• Low Flow Cutoff offers two modes for adjustment:
• Decrease Low Flow Cutoff
• Increase Low Flow Cutoff
It also includes a dead band such that once flow goes below the cutoff value, output does
not return to the normal flow range until flow goes above the dead band. The dead band
extends to approximately 20 percent above the low flow cutoff value. The dead band
prevents the output from bouncing between 4 mA and normal flow range if the flow rate is
near the low flow cutoff value.
LFC response
Defines how the output of the Vortex meter will behave entering into and coming out of
the Low Flow Cutoff. Options are stepped or damped. (See Technical Note
00840-0200-4004 for more information regarding Low Flow Measurement).
Low pass corner frequency
Sets the low-pass filter corner frequency to minimize the effects of high frequency noise. It
is factory set based on line size and service type. Adjustments may be required only if you
are experiencing problems. See Troubleshooting.
The Low Pass Filter corner frequency variable offers two modes for adjustment:
• Decrease Low Pass Corner Frequency
• Increase Low Pass Corner Frequency
Note
Do not adjust this parameter unless directed to do so by an Emerson representative.
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Trigger level
Configured to reject noise within the flow range while allowing normal amplitude variation
of the vortex signal. Signals of amplitude lower than the Trigger Level setting are filtered
out. The factory setting optimizes noise rejection in most applications. Trigger Level offers
two modes for adjustment:
• Increase Trigger Level
• Decrease Trigger Level
Note
Do not adjust this parameter unless directed to do so by an Emerson representative.
Restore default filter
Restores all of the signal conditioning variables to default values. Default values for signal
conditioning variables will be set automatically depending on fluid type using the
Optimize DSP function with a density setting of 40 lb/ft³ (640 kg/m³) for liquid or
0.15 lb/ft³ (2.4 kg/m³) for gas.
Flow damping
The default damping value is 2.0 seconds. Flow Damping can be reset to any value
between 0.2 and 255 seconds.
Temperature damping
The default damping value is 2.0 seconds. Temperature Damping can be reset to any value
between 0.4 and 32 seconds. Temperature Damping can only be configured if
Temperature is assigned to be PV.
7.15 Device information
ProLink III Device Tools → Device Information
Used for identification of flow meters in the field and to store information that may be
useful in service situations. Information variables have no effect on flow meter output or
process variables.
See also Tag and Long Tag.
Descriptor
Longer user-defined variable to assist with more specific identification of the particular
flowmeter. It is usually used in multi-flowmeter environments and provides 16 characters.
Message
Provides an even longer user-defined variable for identification and other purposes. It
provides 32 characters of information and is stored with the other configuration data.
Date
User-defined variable that provides a place to save a date, typically used to store the last
date that the transmitter configuration was changed.
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Write Protect
Read-only informational variable that reflects the setting of the hardware security switch.
If Write Protect is ON, configuration data are protected and cannot be changed from a
HART-based communicator or control system. If Write Protect is OFF, configuration data
may be changed using the communicator or control system. For HART 7 devices, a
software lock is also available.
Revision Numbers
Fixed informational variables that provide the revision number for different elements of
your equipment. These revision numbers may be required when calling . Revision numbers
can only be changed at the factory and are provided for the following elements:
Universal Revision
Transmitter Revision
Software Revision
Hardware Revision
DD Revision
Designates the HART Universal Command specification to which
the flow meter is designed to conform.
Designates the revision for vortex flow meter specific command
identification for HART compatibility.
Designates the internal software revision level for the flow meter.
Designates the revision level for the vortex flow meter hardware.
Factory-defined unique identifier for device descriptor revision
identification in the software.
7.16 Change HART revisions
On enabled devices, change between HART revision 5 and 7. Configuration will be saved
while switching between revisions.
7.17 Special process variable units
ProLink III Device Tools → Configuration → Process Measurement →
Flow → Special Units
Allows the user to create flow rate units that are not among the standard options.
Configuration of a special unit involves entry of these values: base flow unit, base time
unit, user defined unit and conversion number. For example, the following settings would
be used to display flow in beer barrels per minute instead of gallons per minute, with one
beer barrel equal to 31 gallons:
• Base volume unit: gal
• Base time unit: min
• User defined unit: br
• Conversion number: 1/31.0
Base flow unit
The unit from which the conversion is made.
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Table 7-3: Base flow unit
Volumetric flow Mass flow Corrected volume flow
U.S. gallon gram U.S. gallon
liter kilogram liter
imperial gallon metric ton imperial gallon
cubic meter pound barrel
barrel short ton standard cubic foot
cubic foot normal cubic foot
Base time unit
Provides the time unit from which to calculate the special units. For example, if the special
unit is a volume per minute, select minutes. Choose from the following units:
• Seconds (s)
• Minutes (min)
• Hours (h)
• Days (d)
Special flow unit
A user created custom flow unit. The special unit is limited to four characters. The LCD
display will display the actual four character user defined special unit.
Conversion number
Used to relate base units to special units. For a straight conversion of volume units from
one to another, the conversion number is the number of base units in the new unit.
For example, if it is desired to convert from gallons to beer barrels there are 31 gallons in a
beer barrel. The conversion equation is as follows (where beer barrels is the new volume
unit):
1 gallon = 0.032258 bbl.
7.18 Elapsed Time Meter
ProLink III Device Tools → Totalizer Control → Totalizers
When enabled, Elapsed Time Meter provides an accurate measurement of the time the
transmitter is powered. This can be useful as a diagnostic tool if a power interruption is
suspected. Use Reset to restart the timer at zero.
7.19
70 Rosemount™ 8800D Vortex Flow Meter with MPA or MCA option
Flow totalizer
ProLink III Device Tools → Totalizer Control → Totalizers
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The flow totalizer keeps a running total of the flow that has run through the meter in the
user-selected flow variable (Corrected Volume Flow, Mass Flow, Velocity Flow, or Volume
Flow). It can run continuously or be controlled using the Start, Stop, and Reset (to zero)
commands.
Totalizer control
Allows the totalizer to be started, stopped, or reset.
Start
Stop
Reset
Totalizer configuration
Used to configure the flow parameter (volume, mass, velocity, or corrected volume flow)
that will be totaled.
Note
The totalizer value is saved in the non-volatile memory of the electronics every three
seconds. Should power to the transmitter be interrupted, the totalizer value will start at
the last saved value when the power is re-applied.
Note
Changes that affect the density, density ratio, or compensated K-Factor will affect the
totalizer value being calculated. These changes will not cause the existing totalizer value
to be recalculated.
Note
In order to totalize in compensated mass flow, set pulse output to Scaled Mass even if the
pulse output was not ordered or will not be used. Please refer to section 7.9 for pulse
output configuration.
Starts the totalizer counting from its current value.
Interrupts the totalizer count until it is restarted again. This feature is often used
during pipe cleaning or other maintenance operations.
Returns the totalizer value to zero. If the totalizer was running, it will continue to
run starting at zero.
7.20 Locate device
For HART 7 devices with LCD displays, enabling Locate Device displays the characters
0-0-0-0 on the LCD display. This allows for easy field identification of the device during
commissioning or service.
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8 Troubleshooting
8.1 Communication problem with HART-based communicator
Recommended actions
1. Check for a minimum of 10.8 VDC at the transmitter terminals.
2. If possible, visually verify transmitter is powered by viewing the LCD display.
3. Check for loop resistor (250 to 1000 ohms).
4. Measure the loop resistor value (R
(Vps). Check that [Vps – (R
5. Check for the transmitter in multidrop mode by setting communicator to
search all HART addresses.
6. Check for the transmitter in burst mode. It may help to turn off burst mode for
HART communication.
7. Remove the pulse connection if you have a three-wire pulse installation.
8. Cycle power and try again.
9. Replace the electronics.
x 0.024)] > 10.8 VDC.
loop
) and the source power supply voltage
loop
8.2 Incorrect 4–20 mA output
Recommended actions
1. Check for a minimum 10.8 VDC at the transmitter terminals.
2. If the output current is outside the range of 4–20 mA, check for diagnostic
information and correct as appropriate.
3. Check the URV, LRV, Density, Special Units, LFC. Compare these inputs with the
sizing program results. Correct the configuration.
4. Perform a 4–20 mA loop test, and if necessary, perform a 4-20mA trim.
5. Connect a milliameter across the "TEST" clips on the terminal block and confirm
measured current matches loop test value. If the system measured current
does not match current measured by the milliameter, check loop wiring and
terminations.
6. Check for corrosion on the terminal block.
7. Refer to Advanced troubleshooting
8. For the electronics verification procedure, see Electronics verification.
9. Replace the electronics if necessary.
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8.3 Incorrect pulse output
Recommended actions
1. Check that the 4–20 mA output is correct.
2. Confirm the wiring polarity as well as pulse power supply and resistance are
within specifications. See Pulse output.
3. Check the pulse mode and the scaling factor. Make sure the scaling factor is not
inverted.
4. Perform a pulse test.
5. Select the pulse scaling so that the pulse output is less than 10,000Hz at URV.
8.4 Error messages on a HART-based communicator
Recommended actions
See Diagnostic messages.
8.5 Flow in Pipe, No Output
Recommended actions for basic problems
1. Check sizing. Make sure the flow is within measurable flow limits. Use the
online Emerson Size and Selection tool for best sizing results.
2. Check to make sure the meter is installed with the arrow in the direction of
process flow.
3. For installations with transmitter mounted remotely from the meter, confirm
remote cable connections.
4. Perform basic checks for Incorrect 4–20 mA output.
5. Check and correct the configuration parameters in this order:
a. Process fluid
b. Process density
c. Base density
d. Reference K-factor
e. Variable mapping
f. PV unit
g. Range values - (URV, LRV)
h. Optimize signal processing
i. Pulse mode
j. Scaling (if used)
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6. For the electronics verification procedure, see Electronics verification.
Recommended actions for electronics problems
1. Check for Diagnostic messages. See Diagnostic messages for more information
about the messages.
2. Run a self test with a HART-based interface tool.
3. Using a sensor simulator, apply a test signal.
4. Check the configuration, LFC, trigger level, and STD vs. actual flow units.
5. Replace the electronics.
Recommended actions for application problems
1. Check sizing. Make sure the flow is within measurable flow limits. Use the
online Emerson Size and Selection tool for best sizing results.
2. Calculate the expected frequency. If the actual frequency is the same, check the
configuration.
3. Check that the application meets viscosity and density requirements for the line
size.
4. Recalculate the back pressure requirement. If it is necessary and possible,
increase the back pressure, flow rate, or operating pressure.
Recommended actions for sensor problems
1. Inspect sensor lead wire and sensor connection for damage. Replace if
necessary.
2. Check tightness of SMA connector.
The SMA nut should be gently secured to the nut with a 5/16 inch wrench to
7 in-lbs (0.8 N-m) to the electronics housing. Avoid over-tightening the coaxial
sensor cable to the electronics housing.
3. Check that the sensor impedance at process temperature is > 1 Mega- Ohm.
Replace the sensor if necessary. See Replacing the sensor.
4. Check the torque on the sensor nut and make sure it is at 32 ft lbf (43.4 N m).
For a 1-8 inch (2.54-20.32 cm) meter body with ANSI 1500 flanges, the torque
on the sensor nut should be 50 ft lbf (67.8 N m).
8.6 No flow, output
Recommended actions for basic problems
1. Check basic configuration and ADSP filter settings.
2. Check for excessive pipe vibration by monitoring Signal Strength and Shedding
Frequency. Typically pipe vibration would be less than 30 Hz. Please refer to the
product spec section for more information on vibration spec.
3. Check the shedding frequency to see if it is locked to 50/60 Hz for AC line noise.
Remote installations are more susceptible.
4. Verify line is blocked or fully shut down
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5. Check to make sure the meter is installed with the arrow in the direction of
process flow.
8.7 Diagnostic messages
When a diagnostic event occurs, the transmitter posts information to the communication
tools and the LCD. The following tables list the messages and descriptions as they appear
in ProLink or AMS, as well as their associated display/communication tool messages.
Table 8-1: Faults
Display ProLink III Description
FAULt^^^
ELECT
FAULt^^^
SFTWR
FAULt^^^
COPHW
FAULt^^^
^ASIC
FAULt^^^
^COEFF
Electronics Failure This is a summary fault condition indicating a failure in the
transmitter electronics.
• Cycling power may resolve the problem.
• Replace the electronics if the problem persists.
Software Detected Error One of the software task stacks has overflowed. Resetting the
transmitter will clear the faults.
• Cycling power may resolve the problem.
• Report the problem to the factory.
• Replace the electronics if the problem persists.
Output Board Electronics Failure The coprocessor built in Self Test has detected a fault, or the
coprocessor has detected a math or instruction fault.
• Cycling power may resolve the problem.
• Replace the electronics if the problem persists.
Digital Filter Error The digital filter in the transmitter electronics is not reporting. The
transmitter will remain in ALARM until the digital signal processor
resumes reporting flow data.
• Cycling power may resolve the problem.
• Replace the electronics if the problem persists.
Coprocessor Coefficient Error The area of non-volatile memory used to store the curve fit
coefficients for the coprocessor calculations does not contain valid
data. This data can only be loaded at the factory.
• Cycling power may resolve the problem.
• Replace the electronics if the problem persists
FAULt^^^
NVMEM
76 Rosemount™ 8800D Vortex Flow Meter with MPA or MCA option
Non-Volatile Memory Error At least one segment of non-volatile memory has failed a checksum
verification. If the 'Factory Non-Volatile Memory Error' is NOT also
active this problem may be fixed by reconfiguring all transmitter
parameters. The transmitter will remain in ALARM until the EEPROM
checksum test passes.
• Reconfigure all transmitter parameters.
• Replace the electronics if the problem persists.
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Table 8-1: Faults (continued)
Display ProLink III Description
FAULt^^^
^^ROM
ALErt ^ ^ ^ or
FAULT^^^
T/C
FAULt^^^
SDCOM
FAULt^^^
SDPLS
ROM Checksum Error The microprocessor ROM has failed a checksum test. This test is run
at start-up and in the background.
• Cycling power may resolve the problem
• Replace the electronics if the problem persists
Thermocouple Failure
Internal Communications Fault After several attempts the microprocessor has failed in
Internal Signal Fault The flow data from an ASIC used in the conversion of the flow
Note
This message is a fault when Temperature Sensor Failure Mode is
set to Go to Alarm. It is an alert when Temperature Sensor Failure
Mode is set to Use Fixed Process Pressure.
The thermocouple used to measure process temperature has failed.
• Check the thermocouple connections to the transmitter.
• Replace the thermocouple if the problem persists.
communicating with an ASIC used in the conversion of the flow
sensor signal.
• Cycling power may resolve the problem.
• Check the connector between electronics boards.
• Replace the electronics if the problem persists.
sensor signal has been lost.
• Cycling power may resolve the problem.
• Check the connector between electronics boards.
• Replace the electronics if the problem persists.
FAULt^^^
NVMEM
FAULt^^^
PT HW
Factory Non-Volatile Memory
Error
Process Temperature Electronics
Failure
A segment of non-volatile memory that is written only at the
factory has failed a checksum verification. This fault cannot be fixed
by reconfiguring transmitter parameters. Replace the electronics.
The electronics circuitry that supports the measurement of the
Process Temperature has failed. The transmitter can still be used in
a conventional volume flow mode. Replace the electronics if
Process Temperature measurement is required.
Table 8-2: Maintenance
Display ProLink III Description
Trigger Overrange The Trigger Level configuration of the Digital Filters is out of range.
• Re-enter the Trigger Level configuration.
Low-Pass Filter Overrange The Low-pass Filter configuration of the Digital Filters is out of
range.
• Reconfigure the Low-pass Filter.
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Table 8-2: Maintenance (continued)
Display ProLink III Description
Low Flow Cutoff Out of Range The Low Flow Cutoff configuration of the Digital Filters is out of
range.
• Reconfigure the Low Flow Cutoff.
FAULt^^^
CONFIG
FAULt^^^
LOOPV
PT^^^
FIXED
Electronics Temperature Out of
Limits
Invalid Configuration Parameters critical to the operation of the transmitter are not
Low Loop Voltage The voltage at the transmitter terminals has dropped to a level that
Fixed Process Temperature
Active
The temperature of the electronics is too high or too low.
• Adjust the ambient conditions of the transmitter.
• Consider remotely mounting the electronics.
properly configured. Refer to the Configuration Status to determine
which parameters should be reconfigured. The valid configuration
of some parameters is dependent on the current configuration of
other parameters. Consult the manual for assistance.
• Re-enter the invalid configuration parameter.
is causing internal power supplies to drop, reducing the capability
of the transmitter to accurately measure a flow signal.
• Check the voltage at the transmitter terminals.
• Either increase power supply or reduce loop resistance.
The Fixed Process Temperature value is being used for density
calculations. The thermocouple used to measure process
temperature has failed.
• Check the thermocouple connections to the transmitter.
• Replace the thermocouple if the problem persists.
Table 8-3: Advisory
Display ProLink III Description
Smart Fluid Alarm Active A Smart Fluid alarm has been triggered. The Smart Fluid diagnostic
is enabled and has detected a transition from liquid to gas flow.
• Acknowledge the Smart Fluid Alarm if it is latched. The alarm
will remain active as long as there is gas flow detected.
SIGnAL^^
SIMUL
SEnSOr^^
OFFLN
78 Rosemount™ 8800D Vortex Flow Meter with MPA or MCA option
Flow Simulation Mode The flow signal is being produced from a signal generator internal
to the Vortex transmitter. The flow value reported by the
transmitter is NOT the process flow value.
• This is informational only.
Flow Signal Injection The flow signal is being injected into the transmitter from an
external signal generator. The flow value reported by the
transmitter is NOT the process flow value.
• This is informational only.
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Table 8-3: Advisory (continued)
Display ProLink III Description
ALErt ^^^
PTOSL
ALErt ^^^
PT>UL
Process Temperature Out of
Range
Process Temperature Above
Density Calculation Limits
The Process Temperature is beyond the defined sensor limits of –
58 °F to +842 °F (–50 °C to +450 °C).
• This is informational only.
The Process Temperature is above the high limit for Saturated and
Superheated Steam or Liquid density calculations. This status only
occurs when:
• Process Fluid is Steam and Actual Compensation is
Temperature, or Pressure and Temperature
• Process Fluid is Liquid, Temperature Compensated Liquid is
Water or User Defined, and Actual Compensation in
Temperature
Steam
Liquids
The density calculation will use a process temperature of
695.408 °F (368.56 °C) when Actual Compensation in
Temperature Compensation or 842 °F (450 °C) when
Actual Compensation in Pressure and Temperature
Compensation while this condition is active.
Water
User
Defined
The density calculation will use a process
temperature of 600.8°F (316 °C) when
Temperature Compensated Liquid is Water
and Actual Compensation in Temperature
Compensation while this condition is
active.
The density calculation will use a process
temperature of the last custom
temperature point while this condition is
active.
• This is informational only.
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Table 8-3: Advisory (continued)
Display ProLink III Description
ALErt^^^
PT<LL
(freq.)
PULSE
Process Temperature Below
Density Calculation Limits
Pulse Output Fixed The transmitter has been commanded to output a fixed pulse
The Process Temperature is below the low limit for Saturated and
Superheated Steam or Liquid density calculations. This status only
occurs when:
• Process Fluid is Steam and Actual Compensation is
Temperature, or Pressure and Temperature
• Process Fluid is Liquid, Temperature Compensated Liquid is
Water or User Defined, and Actual Compensation in
Temperature
Steam
Liquids
• This is informational only.
output frequency. The pulse output does not reflect the process
flow.
• Exit the Pulse Loop test.
The density calculation will use a process temperature of
176 °F (80 °C) while this condition is active.
Water
User
Defined
The density calculation will use a process
temperature of 32 °F (0 °C) while this
condition is active.
The density calculation will use a process
temperature of the first custom
temperature point while this condition is
active.
PP ^ ^ ^
FIXED
ALErt^^^
PT<ST
Fixed Process Pressure is Active The Fixed Process Pressure value is being used for density
calculations.
The MV Vortex Transmitter has been configured to substitute ‘Fixed
Process pressure’ for density calculations when external pressure
has been lost.
• Check communications connection with external pressure
device.
• Increase the minimum Stale Data Detection parameter.
Process Temperature is below
the saturation curve for the
Density Calculation Limits
Density Calculations are out of range:
1. Process Temperature is below the saturation curve but within
temperature process limits.
2. Process Pressure is in-range for the density calculations.
Density calculation uses the process pressure value and saturated
temperature based on the pressure value.
• Check process conditions.
• This alert is informational only.
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Table 8-3: Advisory (continued)
Display ProLink III Description
ALErt^^^
PP>UL
ALErt^^^
SH LO
ALErt^^^
PP<LL
ALErt^^^
PP<LL
ALErt^^^
PP<LL
Process Pressure is Above the
Density Calculation Limits
Process Temperature is below
the Superheat Threshold
Process Pressure is below the
Density Calculation Limits
(Pressure and Temperature
compensation Superheated/
Saturated Steam)
Process Pressure is below the
Density Calculation Limits
(Pressure compensation only
Saturated Steam)
Process Density is below
calculated limit
(Pressure and Temperature
compensation Superheated/
Saturated Steam)
Process Pressure is greater than the maximum process pressure
limit.
• Check process conditions.
• This alert is informational only.
Process temperature is below the User Defined Superheat limit.
• Check process conditions
• This alert is informational only.
1. Process Pressure is less than the minimum process pressure
limit
2. Process Temperature is greater than the saturation
temperature at 6.88 psia.
• Check process conditions.
• This alert is informational only.
Process Pressure is less than the minimum process pressure limit.
• Check process conditions.
• This alert is informational only.
Caught Process Pressure value is less than the minimum process
pressure limit and Process temperature is below the saturation limit
for the minimum pressure limit.
This alert is informational only.
Note
ALErt^^^ PT<LL will also display.
FAULt ^PP
or ALErt ^PP
Process Pressure Unavailable
Note
This message is a fault when Loss of Pressure is set to Go to Alarm. It
is an alert when Loss of Pressure is set to Use Fixed Process Pressure.
Process Pressure has not been updated within the period defined by
the minimum Stale Data Detection parameter.
• Check communications connection with external pressure
device.
• Increase the minimum Stale Data Detection parameter.
8.8 Temperature and pressure compensation troubleshooting
Mass flow measurement with temperature and pressure compensation requires the
correct combination of measurement devices, physical configuration, wiring, and
software configuration to be successful. The vortex transmitter software is designed to
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C
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identify configuration problems and communicate them to users on the local display or
through the configuration tools.
Use the information in Diagnostic messages to determine where problems may have
originated, and then modify the installation details or configuration accordingly. See also
Mass compensation and Advanced installation.
8.9 Electronics test points
As shown in the following figure, there are several test points located on the electronics.
Figure 8-1: Electronics test points
A. Ground
B. Test frequency input
C. Test point 1
The electronics are capable of internally generating a flow signal that can be used to
simulate a sensor signal to perform electronics verification with a handheld communicator
or AMS Device Manager interface. The simulated signal amplitude is based on the
transmitter required minimum process density. The signal being simulated can be one of
several profiles – a simulated signal of constant frequency or a simulated signal
representative of a ramping flow rate. The electronics verification procedure is described
in Electronics verification. To verify the electronics, you can input a frequency on the TEST
FREQ IN and GROUND pins to simulate flow via an external signal source such as a
frequency generator. To analyze and/or troubleshoot the electronics, an oscilloscope (set
for AC coupling) and a handheld communicator or AMS Device Manager interface are
required. The following figure is a block diagram of the signal as it flows from the sensor to
the microprocessor in the electronics.
82 Rosemount™ 8800D Vortex Flow Meter with MPA or MCA option
A
B
C
D
E
F
G
H
0
0
3.0V
A
B
C
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Figure 8-2: Signal flow
A. External test frequency input
B. Sensor
C. Charge amplifier
D. Amplifier/Low pass filter
E. TP1
F. A-to-D converter/internal frequency generator
G. Digital filter
H. Microprocessor
TP1—Test point 1
TP1 is the vortex shedding signal after it has gone through the charge amplifier and low
pass filter stages and into the input of the sigma delta A-to-D converter ASIC in the
electronics. The signal strength at this point will be in the mV to Volt range.
TP1 is easily measured with standard equipment.
Example: Correct waveform
Figure 8-3 shows an ideal (clean) waveform. Consult technical support if the waveform you
detect is not similar in principle to this figure.
Figure 8-3: Clean signals
A. Vortex signal (TP1)
B. Trigger level
C. Shedding frequency output
Examples: Wrong waveforms
Figure 8-4 and Figure 8-5 show waveforms that may cause the output to be inaccurate.
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A
B
C
0
0
3.0 V
0
0
3.0V
A
B
C
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Figure 8-4: Noisy signals
A. Vortex signal (TP1)
B. Trigger level
C. Shedding frequency output
Figure 8-5: Improper Sizing/Filtering
A. Vortex signal (TP1)
B. Trigger level
C. Shedding frequency output
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Maintenance
9 Maintenance
9.1 Transient protection
The optional transient terminal block prevents damage to the flowmeter from transients
induced by lightning, welding, heavy electrical equipment, or switch gears. The transient
protection electronics are located in the terminal block.
IEEE C62.41 - 2002 Category B
The transient terminal block was verified using the following test waveforms specified in
the IEEE C62.41 - 2002 Category B standard:
• 3 kA crest (8 X 20 ms)
• 6 kV crest (1.2 X 50 ms)
• 6 kV/0.5 kA (0.5 ms, 100 kHz, ring wave)
9.1.1
Installing or replacing the transient protection
For flowmeters ordered with the transient protector option (T1), the protector is shipped
installed.
The transient protection kit includes the following:
• One transient protection terminal block assembly
• Three captive screws
When purchased separately from the transmitter, install the protector using a small
instrument screwdriver, a pliers, and the transient protection kit.
1. If the flowmeter is installed in a loop, secure the loop and disconnect power.
2. Remove the field terminal side flowmeter cover.
3. Remove the captive screws.
Refer to the following figure.
4. Remove the housing ground screw.
5. Use pliers to pull the terminal block out of the housing.
6. Inspect the connector pins for straightness.
7. Place the new terminal block in position and carefully press it into place.
The terminal block may have to be moved back and forth to get the connector pins
started into the sockets.
8. Tighten the captive screws.
9. Install and tighten the ground screw.
10. Replace the cover.
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Figure 9-1: Transient Terminal Block
A. Housing ground screw
B. Captive screws
C. Transient terminal block ground tab
9.2 Installing the LCD indicator
For flowmeters ordered with the LCD indicator, the indicator is shipped installed. When
purchased separately from the Rosemount 8800D, you must install the indicator using a
small instrument screwdriver and the indicator kit. The indicator kit includes:
• One LCD indicator assembly
• One extended cover with o-ring installed
• One connector
• Two mounting screws
• Two jumpers
Refer to the following figure when using these steps to install the LCD indicator:
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A. Electronics board
1. If the flowmeter is installed in a loop, secure the loop and disconnect the power.
2. Remove the flowmeter cover on the electronics side.
Note
The circuit board is electrostatically sensitive. Be sure to observe handling
precautions for static-sensitive components.
3. Insert the mounting screws into the LCD indicator.
4. Remove the two jumpers on the circuit board that coincide with the Alarm and the
Security settings.
5. Insert the connector into the Alarm/Security junction.
6. Gently slide the LCD indicator onto the connector and tighten the screws into place.
7. Insert jumpers into ALARM and SECURITY positions on the face of the LCD indicator.
8. Attach the extended cover and tighten at least one-third turn past O-ring contact.
Note
The indicator may be installed in 90-degree increments for easy viewing. Mounting
screws may need to be installed in the alternative holes based on LCD display
orientation. One of the four connectors on the back of the indicator assembly must
be positioned to fit into the 10-pin connector on the electronic board stack.
Note the following LCD display temperature limits:
• Operating: –4 to 185 °F (–20 to 85 °C)
• Storage: –50 to 185 °F (–46 to 85 °C)
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9.3 Hardware replacement
The following procedures will help you disassemble and assemble the Rosemount 8800D
hardware if you have followed the troubleshooting guide earlier in this section of the
manual and determined that hardware components need to be replaced.
Note
Use only the procedures and new parts specifically referenced in this manual.
Unauthorized procedures or parts can affect product performance and the output signal
used to control a process, and may render the instrument dangerous.
CAUTION
Process should be vented before the meter body is removed from service for
disassembly. Flowmeters should not be left in service once they have been determined
to be inoperable.
9.3.1
Replacing the terminal block in the housing
To replace the field terminal block in the housing, you will need a small screwdriver. Use
the following procedure to replace the terminal block in the housing.
Remove the terminal block
WARNING
For complete warning information, see Safety messages.
1. CAUTION
Remove power before removing the electronics cover.
Turn off the power to the Rosemount 8800D.
2. Unscrew the cover. Refer to the following figure.
Figure 9-2: Terminal block assembly
A. Cover
B. O-ring
C. Terminal block
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D. Captive screws (3x)
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3. Disconnect the wires from the field terminals. Be sure to secure them out of the
way.
4. Remove the ground screw if transient protection (Option T1) is installed.
5. Loosen the three captive screws.
6. Pull outward on the terminal block to remove it from the housing.
Install the terminal block
1. Align the socketed holes on the back side of the terminal block over the pins
protruding from the bottom of the housing cavity in the terminal block side of the
electronics housing.
2. Slowly press the terminal block into place. Do not force the block into the housing.
Check the alignment if it does not glide into place.
3. Tighten the three captive screws to anchor the terminal block.
4. Connect the wires to the appropriate field terminals.
5. Reinstall and tighten the transient ground screw if you have the transient option
(Option T1).
6. Screw on and tighten the cover.
9.3.2
Replacing the electronics boards
The Rosemount 8800D electronics boards may need to be replaced if they have been
damaged or otherwise become dysfunctional. Use the following procedures to replace
electronics boards in the Rosemount 8800D. You will need a small Phillips head
screwdriver and pliers.
Note
The electronics boards are electrostatically sensitive. Be sure to observe handling
precautions for static-sensitive components.
CAUTION
Remove power before removing the electronics cover.
Remove the electronics boards
1. Turn off the power to the Rosemount 8800D.
2. Unscrew and remove the electronics board compartment cover. (Unscrew and
remove the LCD display cover if you have the LCD display option).
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Figure 9-3: Electronics Boards Assembly
A. Electronics boards
B. LCD display
C. LCD display cover
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3. If the meter has the LCD display option, loosen the two screws.
4. Remove the LCD display and the connector from the electronics board.
5. Loosen the three captive screws that anchor the electronics.
6. Use pliers or a flat head screwdriver to carefully remove the sensor cable clip from
the electronics.
7. Remove thermocouple if applicable.
8. Use the handle molded into the black plastic cover to slowly pull the electronics
boards out of the housing.
Install the electronics boards
1. Verify that power to the Rosemount 8800D is off.
2. Align the sockets on the bottom of the two electronics boards over the pins
protruding from the bottom of the housing cavity.
3. Carefully guide the sensor cable through the notches on the edge of the circuit
boards.
4. Slowly press the boards into place. Do not force the boards down. Check the
alignment if they do not glide into place. Carefully insert sensor cable clip into
electronics board.
5. Tighten the three captive screws to anchor the two electronics boards. Ensure that
the SST washer is under the screw in the 2 o’clock position.
6. Reinsert the alarm and security jumpers into the correct location.
7. Re-install the thermocouple if applicable.
8. If the meter has LCD display option, insert the connector header into the LCD
display board.
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a) Remove jumpers from the electronics board.
b) Put the connector through the bezel on the electronics board.
c) Carefully press the LCD display onto the electronics board.
d) Tighten the two screws that retain the LCD display.
e) Insert the alarm and security jumpers in the correct location.
9. Replace the electronics board compartment cover.
Maintenance
9.3.3 Replacing the electronics housing
The Rosemount 8800D electronics housing can be replaced easily when necessary. Use
the following procedure:
Tools needed
• 5/32 inch (4 mm) hex wrench
• 5/16 inch (8 mm) open end wrench
• Screwdriver to disconnect wires
• Tools to disconnect conduit
Note
Remove power before removing the electronics housing.
Remove the electronics housing
1. Turn off the power to the Rosemount 8800D.
2. Remove the terminal block side cover.
3. Disconnect the wires and conduit from the housing.
4. Use a 5/32 inch (4 mm) hex wrench to loosen the housing rotation screws (at the
base of the electronics housing) by turning screws clockwise (inward) until they
clear the bracket.
5. Slowly pull the electronics housing no more than 1.5 inch (40 mm) from the top of
the support tube.
6. Loosen the sensor cable nut from the housing with a 5/16 inch (8 mm) open end
wrench.
Note
Lift the electronics housing until the sensor cable nut is exposed. Do not pull the
housing more than 1.5 inch (40 mm) from the top of the support tube. Damage to
the sensor may occur if this sensor cable is stressed.
Install the electronics housing
1. Verify that power to the Rosemount 8800D is off.
2. Screw the sensor cable nut onto the base of the housing.
3. Tighten the sensor cable nut with a 5/16 inch (8 mm) open end wrench.
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4. Place the electronics housing into the top of the support tube.
5. Use a hex wrench to turn the three hex socket screws counterclockwise (outward)
to engage support tube.
6. Place the access cover on the support tube (if applicable).
7. Tighten the screw on the access cover.
8. Connect conduit and wires.
9. Replace the terminal block cover.
10. Apply power.
Reference Manual
9.3.4 Replacing the sensor
The sensor for the Rosemount 8800D is a sensitive instrument that should not be removed
unless there is a problem with it. If you must replace the sensor, follow these procedures
closely. Consult technical support before removing the sensor.
Note
Be sure to fully check all other troubleshooting possibilities before removing the sensor.
Do not remove the sensor unless it is determined that a problem exists with the sensor
itself. The sensor may not fit on the post if it is removed and replaced more than two or
three times, or replaced incorrectly.
Also, please note that the sensor is a complete assembly and cannot be further
disassembled.
Tools needed
• 5/32 inch (4 mm) hex wrench
• 5/16 inch (8 mm) open end wrench
• 7/16 inch (11 mm) open end wrench
• ¾ inch (19 mm) open end wrench — for 3 inch (80 mm) and 4 inch (100 mm) SST
wafers
• 1-1/8 inch (28 mm) open end wrench (for all other models)
• Suction or compressed air device
• Small, soft bristle brush
• Cotton swabs
• Appropriate cleaning liquid: water or cleaning agent
Removing the sensor
The following procedure applies to flowmeters equipped with a removable support tube.
Note
Sensor cavity could contain line pressure if an abnormal failure has occurred inside the
meter body. For complete warning information, see Safety messages.
1. If the meter body is not a CriticalProcess™ Vortex (CPA Option) proceed to Step 6.
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2. Welded onto the side of the meter body is a valve. Move any nearby equipment
from the line of sight of the valve tube, if possible. Protect other equipment with
shielding, cover, or other type of protection.
3. Position all personnel away from the line of sight of the valve tube.
Note
There are numerous tube fittings that could connect to the tube if there is a need to
drain away process material. The tube on the valve has a 0.188 in (4.8 mm) OD with
a 0.035 in (0.9 mm) wall thickness.
4. Using a 7/16 in (11 mm) open end wrench, slowly loosen the valve nut. Back out the
nut until it stops. There is a set screw which prevents the nut from being completely
removed.
5. Process fluid venting from the valve tube indicates that there is process fluid in the
sensor cavity.
Option Description
If there is no process fluid in
Continue to Step 7.
the sensor cavity
If there is process fluid in the
sensor cavity
Immediately re-tighten the valve nut until process
fluid stops venting. Do not tighten any further.
Stop and contact your technical support. The
meter body may need to be replaced.
6. De-pressurize the flow line.
7. Remove the electronics housing (see Replacing the electronics housing).
8. Loosen the four support tube anchor bolts with a 7/16 in (11 mm) open end
wrench.
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Figure 9-4: Removable support tube assembly
A. Removable support tube
B. Sensor nut
C. Sensor
D. Anchor bolts
E. Meter body
9. Remove the support tube.
10. Loosen and remove the sensor nut from the sensor cavity with a 1-1/8 in (28 mm)
open end wrench.
Use a 3/4 in (19 mm) open end wrench for 3 in (80 mm) and 4 in (100 mm) SST
wafers.
11. Lift the sensor from the sensor cavity. Be very careful to lift the sensor straight up.
Do not rock, twist, or tilt the sensor during removal; this will damage the
engagement diaphragm.
12. If Critical Process (CPA option) is present, tighten the valve to insure it is closed after
the new Vortex sensor is installed. It is recommended that the nut be torqued to 50
in-lbs (5.7 N-m). Over tightening the valve nut could compromise its ability to seal.
Clean the sealing surface
Before installing a sensor in the meter body, clean the sealing surface by completing the
following procedure.
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The metal o-ring on the sensor is used to seal the sensor cavity in the event that process
fluid should corrode through the meter body and enter the sensor cavity. Be sure not to
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scratch or otherwise damage any part of the sensor, sensor cavity, or sensor nut threads.
Damage to these parts may require replacement of the sensor or meter body, or may
render the flowmeter dangerous.
Note
If you are installing a sensor that has been used before, clean the metal o-ring on the
sensor using the procedure below. If you are installing a newly purchased sensor, cleaning
the o-ring is not necessary.
Figure 9-5: O-Ring Sealing Surface in Sensor Cavity
A. Sealing surface
1. Use a suction or compressed air device to remove any loose particles from the
sealing surface and other adjacent areas in the sensor cavity. See Figure 9-5.
Note
Do not scratch or deform any part of the sensor, sensor cavity, or sensor nut
threads.
2. Carefully brush the sealing surface clean with a soft bristle brush.
3. Moisten a cotton swab with an appropriate cleaning liquid.
4. Wipe the sealing surface. Repeat several times if necessary with a clean cotton swab
until there is minimal dirt residue picked up by the cotton swab.
Install the sensor
1. Carefully place sensor over the post in the sensor cavity.
2. Ensure that the sensor is centered on the post. See Figure 9-6 and Figure 9-7.
Note
If the sensor is installed in a high temperature application place the sensor in the
sensor cavity and wait for it to come up to temperature before seating the sensor
on the post.
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Figure 9-6: Sensor installation – improper alignment (before seating)
A. Top view of flowmeter
B. Sensor
C. Sensor cavity in flowmeter
D. Sensor not properly aligned
E. Sensor center line is not aligned with flowmeter center line. Damage to sensor
will occur.
Figure 9-7: Sensor installation – proper alignment (before seating)
A. Top view of flowmeter
B. Sensor
C. Sensor cavity in flowmeter
D. Sensor center line must be aligned with flowmeter center line.
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3. Sensor should remain as close to vertical as possible when applying force to seat.
See Figure 9-8.
Figure 9-8: Sensor installation – applying force
A. Pressure
B. Sensor center line must be aligned with flowmeter center line
C. Sensor properly seated
Maintenance
9.3.5
4. Manually push down on the sensor by applying equal pressure for engagement onto
the post.
5. Screw the sensor nut into the sensor cavity. Tighten the nut with a 1-1/8 inch (28
mm) open end torque wrench to 32 ft-lbs (43.4 N-m) (50 ft-lbs [67.8 N-m] for ANSI
1500 meter body).
Use a 3/4 inch (19 mm) open end wrench for 3 inch (80 mm) and 4 inch (100 mm)
SST wafers. Do not over-tighten the sensor nut.
6. Replace the support tube.
7. Tighten the four bolts that anchor the support tube in place with a 7/16 inch (11
mm) open end wrench.
8. Install the flowmeter electronics housing. See Replacing the electronics housing.
Remote electronics procedures
If the Rosemount 8800D electronics housing is mounted remotely, some replacement
procedures are different than for the flowmeter with integral electronics. The following
procedures are identical:
• Replacing the terminal block in the housing.
• Replacing the electronics boards .
• Replacing the sensor.
Disconnect the coaxial cable at the meter
1. Remove the access cover on the meter body support tube if present.
2. Loosen the three housing rotation screws at the base of the meter adapter with a
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5/32 inch (4 mm) hex wrench by turning the screws clockwise (inward) until they
clear the bracket.
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3. Slowly pull the meter adapter no more than 1.5 inch (40 mm) from the top of the
support tube.
4. Loosen and disconnect the sensor cable nut from the union using a 5/16 inch (8
mm) open end wrench.
Note
Do not pull the adapter more than 1.5 inch (40 mm) from the top of the support
tube. Damage to the sensor may occur if the sensor cable is stressed.
Figure 9-9: Coaxial Cable Connections
A. ½ NPT conduit adapter or cable gland (supplied by customer)
B. Coaxial cable
C. Meter adapter
D. Union
E. Washer
F. Nut
G. Sensor cable nut
H. Support tube
I. Meter body
Detach the meter adapter
Use the following steps if it is necessary to remove the coaxial cable.
1. Loosen and remove the two screws that hold the union onto the meter adapter and
pull the union away from the adapter.
2. Loosen and remove the sensor cable nut from the other end of the union.
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3. Loosen and disconnect the conduit adapter or cable gland from the meter adapter.
Attach the meter adapter
1. If you are using a conduit adapter or cable gland, slide it over the plain end of the
coaxial cable (the end without a ground wire).
2. Slide the meter adapter over the coaxial cable end.
3. Use a 5/16 inch (8 mm) open end wrench to securely tighten the sensor cable nut
onto one end of the union.
4. Place the union onto the two screws extending out of the meter adapter and
tighten the two screws.
Connect the coaxial cable at the meter body
1. Pull the sensor cable out of the support tube slightly and securely tighten the sensor
cable nut onto the union.
Note
Do not stretch the sensor cable over 1.5 inch (40 mm) beyond the top of the
support tube. Damage to the sensor may occur if the sensor cable is stressed.
2. Place the meter adapter into the top of the support tube and line up the screw
holes.
3. Use a hex wrench to turn the three adapter screws counterclockwise (outward) to
engage the support tube.
4. Replace the access cover on the support tube — 6 inch (152.4 mm) to 8 inch (203.2
mm) wafer style only.
5. Tighten the conduit adapter or cable gland into the meter adapter.
Remove the coaxial cable from the electronics housing
1. Loosen the two housing screws from the housing adapter.
2. Remove the housing adapter from the housing.
3. Loosen and remove the coaxial cable nut from the base of the electronics housing.
4. Remove the coaxial cable ground connection from the housing base by loosening
the housing base screw that is connecting it to the housing base.
5. Loosen the conduit adapter (or cable gland) from the housing adapter.
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Figure 9-10: Remote electronics exploded view
A. Ground connection
B. Housing base screw
C. Housing adapter
D. Housing adapter screws
E. Conduit adapter (optional—supplied by customer)
F. Coaxial cable nut
G. Electronics housing
Attach the coaxial cable
1. Route the coaxial cable through the conduit (if you are using conduit).
2. Place a conduit adapter over the end of the coaxial cable.
3. Remove the housing adapter from the electronics housing (if attached).
4. Slide the housing adapter over the coaxial cable.
5. Remove one of the four housing base screws that is in closest proximity to the
ground connection.
6. Re-install the housing base screw by passing it through the ground connection.
7. Attach and securely tighten the coaxial cable nut to the connection on the
electronics housing.
8. Align the housing adapter with the housing base and attach with the two housing
adapter screws.
9. Tighten the conduit adapter to the housing adapter.
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