Vortex Shedding Flow Meter
RVL Series
VRX-UM-00371-EN-02 (August 2015)
User Manual
Vortex Shedding Flow Meter, RVL Series
Page ii VRX-UM-00371-EN-02 August 2015
User Manual
CONTENTS
Description 5
Operating Principle 5
Fluids 5
General Installation Information 6
Flow Rate and Range Requirements 6
Piping Requirements 6
Back Pressure 10
Outputs 10
K-Factors 10
Electrical Installation 11
Power 11
Wiring 11
Three-Pin Connection Option 13
Mechanical Installation 14
RVL Inline Installation 14
RVL Wafer Installation 15
RVL Tube Installation 16
Maintenance 16
Specifications 17
RVL Inline 17
RVL Wafer 18
RVL Tube 19
Dimensions 20
RVL Inline 20
RVL Wafer 21
RVL Tube 21
Troubleshooting 22
Current Loop 22
Over-Stressed Sensor 22
Calibration Certificate Sample 23
August 2015 VRX-UM-00371-EN-02 Page iii
Vortex Shedding Flow Meter, RVL Series
Page iv VRX-UM-00371-EN-02 August 2015
Description
DESCRIPTION
The RVL series meter uses vortex-shedding technology for repeatable flow measurement accurate to ±1 percent of full scale
The meter has no moving parts, and any potential for fluid contamination is eliminated by the corrosion-resistant all plastic construction The meter includes a compact two-wire (4…20 mA) or three-wire (0…5V DC or pulse) transmitter, contained within a conveniently replaceable plug-in electronics module All electronics are housed in a corrosion-resistant enclosure
Unlike meters containing metal or moving parts, the RVL is perfect for aggressive or easily contaminated fluids Applications range from ultra-pure water to highly corrosive chemicals and slurries Units can be re-calibrated and the meter output span can be reprogrammed in the field
OPERATING PRINCIPLE
Operation of the RVL vortex flow meter is based on the vortex shedding principle As fluid moves around a body, vortices
(eddies) are formed and move downstream They form alternately, from one side to the other, causing pressure fluctuations
The pressure fluctuations are sensed by a piezoelectric crystal in the sensor tube, and are converted to a 4…20 mA, 0…5V DC or pulse signal The frequency of the vortices is directly proportional to the flow rate The results are extremely accurate and repeatable measurements using no moving parts
Counter
Detector
Bluff
Body
Detector
Figure 1: Operating principle
FLUIDS
Use any clean liquid compatible with the plastic material of construction that does not contain significant amounts of fibers or abrasive materials
DO NOT USE WITH EXPLOSIVE OR FLAMMABLE MATERIALS, FOOD OR BEVERAGES, OR GASEOUS FLUIDS.
Viscosities above 1 cSt raise the minimum usable flow rate and reduce the flow range This effect is linear to viscosity No adjustments are required for viscosities up to 2 0 cSt Liquids with higher viscosities adversely affect the permissible amount
and duration of over range flow See
Table 1
Viscosity
1 cSt
2 cSt
3 cSt
4 cSt
5 cSt
6 cSt
Minimum
3
4
1
2
Maximum
12
12
12
12
5 12
6 12
Table 1: Viscosity and flow range
Flow Range
12:1
6:1
4:1
3:1
2 4:1
2:1
August 2015 VRX-UM-00371-EN-02 Page 5
General Installation Information
GENERAL INSTALLATION INFORMATION
Before installing the meter:
• Find an area for installation away from large electrical motors, transformers or other devices that can produce high electromagnetic or electrostatic fields The vortex transmitter contains electric circuitry that can be affected by these interferences
• Proper grounding is required to eliminate electrical noise which may be present within the fluid and piping system or in the near vicinity of the vortex transmitter Use exterior grounding strap for non-conductive piping systems to provide a path to earth ground Properly ground pipes in conductive piping systems
Flow Rate and Range Requirements
Most manufacturers state flow range capabilities by publishing the maximum allowed flow rates Then they provide a turndown ratio to determine minimum flow rate To use the turndown ratio, simply divide the maximum rate by the ratio to determine the minimum rate Vortex flow meters have a 12:1 turndown ratio at a viscosity of 1 cSt Higher viscosities will reduce the turndown
N OTEE:
The 1/4 in NPT and 1/2 in flare end meters have a standard turndown ratio of 8:1
Piping Requirements
Turbulence in the pipeline can affect the accuracy of flow meters Typical sources of turbulence are pumps, valves, change in pipe diameter or changes-in-direction in the line Install the meter away from the turbulence source to avoid turbulence issues These distances are indicated in Pipe Diameters (PD) For example, 10 PD is ten times the inside pipe diameter away from the source of turbulence Follow upstream and downstream distances for all sources of turbulence See
Figure 2 on page
7
,
Figure 3 on page 8
,
Figure 4 on page 9
and
Figure 5 on page 9
for proper piping distance requirements
N OTEE:
Pulsating flow affects accuracy Pressure pulses affect accuracy
Page 6 VRX-UM-00371-EN-02 August 2015
Configuration
1 plane change
1 plane change w/outlet valve
2 plane changes
2 plane changes w/outlet valve
General Installation Information
Piping Requirements
(pipe diameters)
Inlet Outlet
20
5
10
27
5
10
20 Dia
Minimum
Flow
5 Dia
Minimum
Accuracy
(full scale)
±1 00%
Repeatability
(of point)
0 25%
20 Dia
Minimum
Flow
10 Dia
Minimum
Two Plane
Changes
27 Dia
Minimum
Flow
5 Dia
Minimum
Two Plane
Changes
27 Dia
Minimum
Flow
10 Dia
Minimum
Figure 2: Horizontal flow with sensing element in vertical orientation
August 2015 VRX-UM-00371-EN-02 Page 7
General Installation Information
Configuration
1 plane change
1 plane change w/outlet valve
2 plane changes
2 plane changes w/outlet valve
Piping Requirements
Inlet Outlet
20 PD
5 PD
10 PD
27 PD
5 PD
10 PD
20 Dia
Minimum
Flow
5 Dia
Minimum
Accuracy
(full scale)
±1 50%
Repeatability
(of point)
0 25%
20 Dia
Minimum
Flow
10 Dia
Minimum
Two Plane
Changes
27 Dia
Minimum
Flow
5 Dia
Minimum
Two Plane
Changes
27 Dia
Minimum
Flow
10 Dia
Minimum
Figure 3: Horizontal flow with sensing element in horizontal position
Page 8 VRX-UM-00371-EN-02 August 2015
August 2015
Configuration
1 plane change
1 plane change w/outlet valve
2 plane changes
2 plane changes w/outlet valve
Two Plane
Changes
Piping Requirements
Inlet Outlet
20 PD
5 PD
10 PD
27 PD
5 PD
10 PD
Two Plane
Changes
General Installation Information
Accuracy
(full scale)
Repeatability
(of point)
±1 00% 0 25%
27 Dia
Minimum
27 Dia
Minimum
20 Dia
Minimum
20 Dia
Minimum
10 Dia
Minimum
5 Dia
Minimum
10 Dia
Minimum
Figure 4: Vertical flow with a change in direction or valve
25 Dia
Minimum
Flow
5 Dia
Minimum
20 Dia
Minimum
10 Dia
Minimum
2 Dia
Minimum
25 Dia
Minimum
Flow
5 Dia
Minimum
20 Dia
Minimum
5 Dia
Minimum
2 Dia
Minimum
Two Plane
Changes
30 Dia
Minimum
Flow
5 Dia
Minimum
5 Dia
Minimum
25 Dia
Minimum
2 Dia
Minimum
Figure 5: Horizontal flow with a change in pipe diameter
VRX-UM-00371-EN-02
5 Dia
Minimum
Page 9
General Installation Information
Back Pressure
Back pressure, the pressure immediately downstream of the meter, must be maintained above a minimum level to avoid cavitation For most applications this may be ignored if the flow rate is less than 75% of maximum For other applications, use the following formula to calculate the minimum back pressure
Back Pressure = 2 75
∆
P + 1 25 PV - 14 7
Where:
∆
P = Pressure drop in psi at max flow
PV = Vapor pressure in psia of the liquid at operating temp
(For example, the PV of water at 100° F is 0 42 )
BP = Back pressure (downstream of meter) in psig
Example
For water, at 100° F (37° C) in a 1/2 in (12 7 mm) meter, where the maximum pressure drop is 8 psi minimum back pressure is
7 8 psig
BP = (2 75 × 8) + (1 25 × 0 42) - 14 7
BP = 22 + 0 525 - 14 7
BP = 7 825
Outputs
The RVL series meters can be ordered with either an analog output (voltage or current) or a rate frequency output The standard analog output is a 4…20 mA current, an optional 0…5V DC is also available The analog output can be re-scaled in the field using a PC communications cable and programming software, which are both available as P N RVS220-954
N OTEE:
All three outputs use unique circuit boards and cannot be changed in the field
The rate frequency output produces pulses whose frequency is proportional to the flow going through the meter Each meter
has a slightly different output frequency which is listed on the calibration sheet that accompanies the meter See
Table 2
for the long term average full scale output frequency for standard size meters
Meter Size
1/4 in (6 35 mm)
1/2 in (12 7 mm)
1/2 in (12 7 mm)
3/4 in (19 05 mm)
1 in (25 4 mm)
1-1/2 in (38 1 mm)
2 in (50 8 mm)
3 in (76 2 mm)
Average Full Scale Frequency
1055 Hz
820 Hz
570 Hz
284 Hz
292 Hz
144 Hz
148 Hz
61 Hz
Table 2: Full scale output frequency
Pulse Width
0 47 msec
0 61 msec
0 88 msec
1 76 msec
1 71 msec
3 47 msec
3 38 msec
8 20 msec
The frequency output option generates a square wave with an amplitude that matches the input power level The pulse width varies with frequency and is found by using the following formula
PW in sec. =
1
2 x Maximum Frequency (Hz)
K-Factors
The K-factor is the number of pulses that must be accumulated to equal a particular volume of fluid Think of each pulse as representing a small fraction of the totalizing unit
Calibration reports that accompany RVL series meters include a nominal K-factor in both gallons and liters See
“Calibration
Certificate Sample” on page 23
Page 10 VRX-UM-00371-EN-02 August 2015
Electrical Installation
ELECTRICAL INSTALLATION
Power
Use the following guidelines when selecting a power source:
• Use an 8…28V DC power supply The specific connection depends on which output is option is used
• Use clean electrical line power
• Do not operate this unit on circuits with noisy components such as fluorescent lights, relays, compressors or variable frequency drives
• Use linear power supplies
N OTEE:
The power and output connections share a common ground
Wiring
4…20 mA Loop
Connect a twisted pair wire (not provided) to the terminals of the transmitter marked 8…28V DC and Output Do not connect the shield to the transmitter if the twisted pair wire is shielded The shield should be grounded at the receiver only
See
Figure 6
The transmitter is reverse-polarity protected
8…28V DC
Output
Programming
4…20 mA
POWER
SUPPLY
8…28V DC
RECEIVER
Load
Figure 6: Loop connection with single load
The receiving equipment must accept industry standard true two-wire or loop powered 4…20 mA process transmitter inputs
The power can either be supplied by the receiving equipment or an external power supply that supplies 24V DC an 30 mA
See
Figure 6
for the wiring setup using an external power source and
Figure 7
using the receiver as the power source Several
receivers may be connected in a series as shown in
Figure 7
, but only one should provide power, and all should have isolated inputs
8…28V DC
Output
Programming
4...20 mA
RECEIVER RECEIVER
RECEIVER/POWER SUPPLY
Additional Loads
Figure 7: Loop connection with multiple loads
August 2015 VRX-UM-00371-EN-02 Page 11
Electrical Installation
The voltage provided by the receiver must be within the limits shown in
Figure 8
1100
1000
900
800
700
600
500
400
300
200
100
Supply Voltage – 8V DC
0.02
= Maximum Loop Resistance
Operate in the
Shaded Region
8
10 12 14 16 18 20 22
Supply Voltage (V DC)
Figure 8: Supply voltage chart
24 26 28
To use this figure:
1 Add the resistance of all the receivers, indicators and the wire in the loop If the wire resistance is unknown, use a value of
50 ohm for a twisted wire of 1000 feet or less with a gauge of #22 awg or heavier
2 Find the total load (in ohms) on the left side of the chart in
Figure 8
and follow that value horizontally until it intersects with the shaded area
3 From the intersection point look straight down to where a vertical line would intersect the voltage scale This is the minimum voltage needed for the transmitter to operate properly under the specific load conditions
Example
After checking the specification for all the loads in an application the total amounted to 800 ohms Following the 800 ohm line to the right, the intersection point is about 3/4 of the way across the chart in
Figure 9
A vertical line through the intersection point crosses the voltage axis at about 24V DC, so with a load of 800 ohms a standard
24 volt power supply would be used
600
500
400
300
200
100
1100
1000
900
800
700
8
10
Supply Voltage - 8V DC
0.02
= Maximum Loop Resistance
Operate in the
Shaded Region
26 28 12 14 16 18 20 22
Supply Voltage (V DC)
Figure 9: Supply voltage example
24
0…5V DC Output
Page 12
8…28V DC
Output
Ground
Programming
+8-28 VDC
Output
Gnd
Digital Display
0…5V DC
8…28V DC
POWER
SUPPLY
Figure 10: 0…5V DC wiring
VRX-UM-00371-EN-02 August 2015
Electrical Installation
Pulse Output
8…28V DC
POWER
SUPPLY
Counter
Pulse
Output
Programming
Output
Gnd
8…28V DC
Output
Ground
Figure 11: Pulse output wiring
Three-Pin Connection Option
An optional three-pin connection is available for when the transmitter/meter combination is mounted remotely from the power source/receiver The mating connector is P N RF8687000
White
4…20 mA Input
8…28V DC
Output
+8-28 VDC
Output
Gnd
Meter
Electronics
Black
– 4…20 mA Input
4…20 mA Input
+ -
8…28V DC
Power Supply
P.N. RF8687000 Connector
– 4…20 mA Input
+ mA
Ammeter
-
Figure 12: Remote connection loop power
Black
- Supply Green
Ground
+8-28 VDC
Output
Gnd
8…28V DC
Output
Ground
White
Output
Meter
Electronics
August 2015
Green
Ground
Black
+V
+ -
8…28V DC
Power Supply
P.N. RF8687000 Connector
White
Output
Counter
Figure 13: Remote connection 0…5V DC or pulse output
VRX-UM-00371-EN-02 Page 13
Mechanical Installation
ON
1 2 3 4 5 6 7 8
CW
SPAN ZERO
White
4…20 mA Input
Black
– 4…20 mA Input
Figure 14: Integral configuration for rate/totalizer indicator
MECHANICAL INSTALLATION
RVL Inline Installation
For proper installation, follow these guidelines:
• Install the meter where pipe vibration is minimal
• Use the upstream and downstream piping requirements shown in
“Piping Requirements” on page 6
• Do not use upstream valves to control flow rate Always keep upstream valves fully open
• Connect good quality ball valves with integral unions directly to the flow meter if the valves are fully open during operation for easy isolation and removal of the flow meter Cavitation and flow rate pulsation adversely affects the flow meter performance
• Do not use diaphragm or piston pumps
• Do not use Teflon tape or any kind of pipe dope when piping
• Handle the meter with care
• Do not use excessive force Screw mating fittings (FNPT) and flanges into the meter hand-tight; then tighten an additional
1/2…3/4 turn
• Always use two wrenches when turning the flow meter into a fitting; one across the flats on the flow meter end, close to the fitting, and one on the fitting
• Do not use tools inside the flow meter, as this may damage the vortex sensor, and void the warranty
The flow meter may be mounted in any orientation Three holes, tapped 1/4-20 UNC-2B, 0 375 in -deep, on 3/4 in centers are provided on the 3/4 in and smaller flow meters Use these holes to provide support for the flow meter if pipe supports are not practical
Page 14 VRX-UM-00371-EN-02 August 2015
Mechanical Installation
RVL Wafer Installation
The RVL Wafer series transmitters are designed with wafer style flow bodies, that mount easily between standard ANSI style pipe flanges
For proper installation, follow these guidelines:
• Install the meter where pipe vibration is minimal
• Use the upstream and downstream piping requirements shown in
“Piping Requirements” on page 6
• Do not use upstream valves to control flow rate Always keep upstream valves fully open
• Connect good quality ball valves with integral unions directly to the flow meter if the valves are fully open during operation for easy isolation and removal of the flow meter Cavitation and flow rate pulsation adversely affects the flow meter performance
• Do not use diaphragm or piston pumps
• Do not use Teflon tape or any kind of pipe dope when piping
• Do not allow gaskets to protrude into the flow stream on flanged meters
Flange Size
1/2…1-1/2 in
2…3 in
Recommended Torque
10…15 ft Ibs
20…30 ft Ibs
Table 3: Torque rating
Follow these steps for proper installation and operation:
1 Space flanges to accommodate the width of the flow body See
“RVL Wafer” on page 21
for dimensions
2 Align the flow body centered with respect to flanges and gaskets, insert threaded rods, retaining nuts and lock washers
3 Install all retaining nuts hand-tight, and then uniformly tighten the nuts in an alternating sequence, diametrically opposed
to each other Uniform stress across the flange prevents leakage at the gasket Torque ratings are listed in
Table 3
4 Use grounding rings when metal pipes are used in conjunction with this meter See
Figure 15
August 2015
Grounding
Rings
Figure 15: Grounding ring installation
VRX-UM-00371-EN-02 Page 15
Maintenance
RVL Tube Installation
For proper installation, follow these guidelines:
• Install the meter where pipe vibration is minimal
• Use the upstream and downstream piping requirements shown in
“Piping Requirements” on page 6
• Do not use upstream valves to control flow rate Always keep upstream valves fully open
• Connect good quality ball valves with integral unions directly to the flow meter if the valves are fully open during operation for easy isolation and removal of the flow meter Cavitation and flow rate pulsation adversely affects the flow meter performance
• Do not use diaphragm or piston pumps
• Do not use Teflon tape or any kind of pipe dope when piping
• Handle the meter with care
To install the meter:
1 Remove any burrs from the pipe ends
2 Slide the flare nut onto the pipe
3 Push the flare nut back far enough so that it will be out of the way when you use the flaring tool
4 Clip the pipe in the flaring tool, keeping the end flush with the face of the tool
5 Slowly turn the handle on the tool until it bottoms out
6 Unscrew the handle and remove the tool to check the quality of the flare a If the flare is not smooth or even the first time, cut off the end with your pipe cutter, and repeat steps 4…6
7 Line up and tighten the nut and flared pipe to the fitting body Make the connection tight, but not so tight that the flow meter body is distorted
• Always use two wrenches when turning a fitting onto the flow meter; one across the flats on the flow meter end close to the fitting, and one on the fitting
• Do not use tools inside the flow meter, as this may damage the vortex sensor, and invalidate the warranty
MAINTENANCE
RVL flow meters do not require maintenance in normal service if they are properly installed Remove the meter from service for cleaning if the flow tube becomes clogged with debris Significant clogging often results in high (up to 20%) and/or erratic output Do not stick tools into the tube, as this may permanently damage the vortex sensor The vortex sensor cannot be repaired in the field To clean the flow tube, run hot, up to 160° F (71 1° C), soapy water into the downstream end of the flow tube Dislodge large objects jammed against the bluff body by lightly tapping the upstream end of the flow tube against a firm surface
CAUTION
DO NOT REMOVE VORTEX METER DURING OPERATION. ALWAYS DISCONNECT THE PRIMARY POWER SOURCE BEFORE
INSPECTION OF SERVICE. DO NOT TAP THE FLOW TUBE SO HARD THAT THE THREADS, ON THREADED UNITS, BECOME
DAMAGED
A schedule of maintenance checks should be determined based upon environmental conditions and frequency of use
Inspect the meter at least once a year
• Visually check for evidence of overheating by noting discoloration of wires or other components
• Check for damaged or worn parts, especially the bluff body, or indications of corrosion
• Check for tight, clean electrical connections and that the device is operating properly
Page 16 VRX-UM-00371-EN-02 August 2015
Specifications
SPECIFICATIONS
RVL Inline
Fluid
Connection
Turndown Ratio
Liquids
NPT Female or Butt (PVDF only)
12:1 for 1/2…2 in (12 7…50 8 mm) meters
8:1 for 1/4 in (6 35 mm) meter
Accuracy
±1% of full scale (4…20 mA or 0…5V DC)
±2% of full scale, frequency pulse
Repeatability
±0 25% of actual flow
PVC standard
Materials
CPVC, PVDF optional
4…20 mA standard
Output Signals
0…5V DC or frequency pulse optional push-pull driver 150 mA sink or source
Power Supply
8…28V DC
Response Time
2 seconds minimum, step-change-in flow
Enclosure
Type 4X (IP 66)
Tube Size
1/4 in (6 35 mm)
1/2 in (12 7 mm)
3/4 in (19 05 mm)
1 in (25 4 mm)
1-1/2 in (38 1 mm)
2 in (50 8 mm)
Maximum Fluid
Temperature
203° F (95° C)
150° F (66° C)
100° F (38° C)
70° F (21° C)
Minimum Flow
0 6 gpm (2 3 lpm)
1 3 gpm (4 7 lpm)
2 1 gpm (7 9 lpm)
4 2 gpm (15 8 lpm)
8 3 gpm (31 5 lpm)
16 7 gpm (63 1 lpm)
Nominal Flow Rates
Maximum Flow
5 gpm (18 9 lpm)
15 gpm (56 8 lpm)
25 gpm (94 6 lpm)
50 gpm (189 3 lpm)
100 gpm (378 5 lpm)
200 gpm (757 1 lpm)
Full Scale Frequency
1052 Hz
570 Hz
284 Hz
292 Hz
144 Hz
142 Hz
Weight
1 5 lbs (0 68 kg)
1 6 lbs (0 72 kg)
1 7 lbs (0 77 kg)
1 8 lbs (0 80 kg)
3 1 lbs (1 40 kg)
2 7 lbs (1 22 kg)
PVC
Not recommended
Maximum Operating Pressure psig (KPa)
CPVC
Consult factory
Not recommended
93 psig (641 KPa)
150 psig (1034 KPa)
63 psig (434 KPa)
120 psig (827 KPa)
150 psig (1034 KPa)
PVDF
Consult factory
130 psig (896 KPa)
150 psig (1034 KPa)
150 psig (1034 KPa)
12
20
10
5
2
1
.5
.2
.1
.05
.3
¼ in.
½ in.
¾ in.
1 in.
1½ in.
2 in.
.5
1 2 5 10 15 25
FLOW (GPM)
50 100 200
Figure 16: RVL inline pressure drop
1000
750
500
350
200
100
50
35
20
10
5
3.5
¼ in.
½ in.
¾ in.
1 in.
1½ in.
2 in.
2 5 10 20 50
30
FLOW (LPM)
200 600
100 300 800
August 2015 VRX-UM-00371-EN-02 Page 17
Specifications
RVL Wafer
Fluid
Connection
Liquids
Wafer
Turndown Ratio
12:1
Accuracy
±1% of full scale (4…20 mA or 0…5V DC)
±2% of full scale, frequency pulse
Repeatability
±0 25% of actual flow
Materials
PVC standard
CPVC, Polypropylene, PVDF optional
Output Signals
4…20 mA standard
0…5V DC or frequency pulse optional push-pull driver 150 mA sink or source
Power Supply
8…28V DC
Response Time
2 seconds minimum, step-change-in flow
Enclosure
Type 4X (IP 66)
Tube Size
1/2 in (12 7 mm)
3/4 in (19 05 mm)
1 in (25 4 mm)
1-1/2 in (38 1 mm)
2 in (50 8 mm)
3 in (76 2 mm)
Maximum Fluid
Temperature
203° F (95° C)
150° F (66° C)
100° F (38° C)
70° F (21° C)
Maximum Fluid
Temperature
203° F (95° C)
150° F (66° C)
100° F (38° C)
70° F (21° C)
Minimum Flow
1 3 gpm (4 7 lpm)
2 1 gpm (7 9 lpm)
4 2 gpm (15 8 lpm)
25 0 gpm (94 6 lpm)
PVC
Not recommended
Not recommended
100 psig (690 KPa)
150 psig (1034 KPa)
Nominal Flow Rates
Maximum Flow
15 gpm (56 8 lpm)
25 gpm (94 6 lpm)
50 gpm (189 3 lpm)
8 3 gpm (31 5 lpm) 100 gpm (378 5 lpm)
16 7 gpm (63 1 lpm) 200 gpm (757 1 lpm)
300 gpm (1136 lpm)
Full Scale Frequency
570 Hz
284 Hz
292 Hz
144 Hz
148 Hz
61 Hz
Weight
0 8 lbs (0 36 kg)
0 9 lbs (0 41 kg)
1 1 lbs (0 50 kg)
1 7 lbs (0 77 kg)
2 6 lbs (1 17 kg)
4 8 lbs (2 16 kg)
Maximum Operating Pressure, Standard
CPVC
Consult factory
63 psig (434 KPa)
120 psig (827 KPa)
150 psig (1034 KPa)
Polypropylene
Not recommended
90 psig (621 KPa)
130 psig (896 KPa)
PVDF
Consult factory
130 psig (896 KPa)
150 psig (1034 KPa)
150 psig (1034 KPa) 150 psig (1034 KPa)
PVC
Not recommended
Consult factory
Consult factory
Consult factory
Maximum Operating Pressure, High Pressure
CPVC
Not recommended
Consult factory
Consult factory
Consult factory
Polypropylene
Not recommended
90 psig (621 KPa)
130 psig (896 KPa)
PVDF
Consult factory
300 psig (2068 KPa)
400 psig (2750 KPa)
150 psig (1034 KPa) 400 psig (2750 KPa)
12
20
10
5
.2
.1
.05
.3
2
1
.5
½ in.
¾ in.
1 in.
1½ in.
2 in.
3 in.
.5
1 2 5 10 15 25
FLOW (GPM)
50 100 200 300
Figure 17: RVL wafer pressure drop
1000
750
500
350
200
100
50
35
20
10
3.5
5
2
1/2 in.
3/4 in.
1 in.
1½ in. 2 in.
3 in.
5 10 20 50
30
FLOW (LPM)
200 600
100 300 800
1200
Page 18 VRX-UM-00371-EN-02 August 2015
Specifications
RVL Tube
Fluid
Connection
Turndown Ratio
Liquids
Tube (Flare end)
12:1 for 3/4 in (19 05 mm) and 1 in (25 4 mm) meters
8:1 for 1/2 in (12 7 mm) meter
Accuracy
±1% of full scale (4…20 mA or 0…5V DC)
±2% of full scale, frequency pulse
Repeatability
±0 25% of actual flow
PVC standard
Materials
CPVC, Polypropylene, PVDF optional
4…20 mA standard
Output Signals
0…5V DC or frequency pulse optional push-pull driver 150 mA sink or source
Power Supply
8…28V DC
Response Time
2 seconds minimum, step-change-in flow
Enclosure
Type 4X (IP 66)
Tube Size
1/2 in (12 7 mm)
3/4 in (19 05 mm)
1 in (25 4 mm)
Minimum Flow
0 6 gpm (2 3 lpm)
1 3 gpm (4 7 lpm)
2 1 gpm (7 9 lpm)
Maximum Fluid Temperature
150° F(66° C)
100° F (38° C)
70° F (21° C)
Nominal Flow Rates
Maximum Flow
5 gpm (18 9 lpm)
15 gpm (56 8 lpm)
25 gpm (94 6 lpm)
Weight
1 5 lbs (0 68 kg)
1 6 lbs (0 72 kg)
1 7 lbs (0 77 kg)
Maximum Operating Pressure
PVDF
130 psig (896 KPa)
150 psig (1034 KPa)
150 psig (1034 KPa)
20
12
10
8
5
.2
.1
.05
.3
2
1
.5
½ in.
¾ in.
1 in.
.5
1 2 5 10 15 25
FLOW (GPM)
50 100 200
FLOW (LPM)
1000
750
500
350
200
100
50
35
20
10
5
3.5
2
½ in.
¾ in.
1 in.
5 10 20 50
30
FLOW (LPM)
200 600
100 300 800
Figure 18: RVL tube pressure drop
August 2015 VRX-UM-00371-EN-02 Page 19
Dimensions
DIMENSIONS
RVL Inline
Cord Grip
Cord Grip
F
Cover
I
NPT/BUTT
END
A
C
Size
1/4 in (6 35 mm)
A in. (mm)
3 81 (97)
1/2 in (12 7 mm) 3 81 (97)
3/4 in (19 05 mm) 3 81 (97)
1 in (25 4 mm) 3 92 (100)
1-1/2 in (38 1 mm) 3 90 (99)
2 in (50 8 mm) 4 31 (109)
Size
A in. (mm)
1/4 in (6 35 mm) 5 90 (150)
1/2 in (12 7 mm) 5 75 (146)
3/4 in (19 05 mm) 5 75 (146)
1 in (25 4 mm) 5 88 (149)
1-1/2 in (38 1 mm) 6 21 (158)
2 in (50 8 mm) 6 60 (168)
B
E
D
Figure 19: RVL inline dimensions
B in. (mm)
1 75 (45)
1 75 (45)
1 75 (45)
1 75 (45)
2 00 (51)
2 00 (51)
PVC/CPVC
C in. (mm)
5 25 (133)
D in. (mm)
2 50 (64)
7 13 (181)
7 63 (194)
8 03 (204)
8 37 (213)
8 37 (213)
2 50 (64)
2 50 (64)
2 50 (64)
2 50 (64)
2 50 (64)
B in. (mm)
0 63 (16)
0 78 (20)
0 94 (24)
1 19 (30)
1 50 (38)
1 88 (48)
PVDF (BUTT Fusion Only)
C in. (mm)
D in. (mm)
4 87 (124)
4 87 (124)
4 87 (124)
5 09 (129)
6 24 (158)
6 77 (172)
1 31 (33)
1 31 (33)
1 44 (37)
2 00 (51)
2 50 (64)
3 00 (76)
E in. (mm)
0 30 (8)
0 55 (14)
0 74 (19)
0 96 (24)
1 50 (38)
1 94 (49)
E in. (mm)
0 30 (8)
0 55 (14)
0 74 (19)
0 96 (24)
1 50 (38)
1 94 (49)
Conduit Adapter
Terminal Strip
Electronics Module
Three-Pin Connector
Flow Sensor Body
F in. (mm)
2 88 (73)
2 88 (73)
2 88 (73)
2 88 (73)
2 88 (73)
2 88 (73)
I in. (mm)
3 00 (76)
3 00 (76)
3 00 (76)
3 00 (76)
3 38 (86)
3 38 (86)
F in. (mm)
2 88 (73)
2 88 (73)
2 88 (73)
2 88 (73)
2 88 (73)
2 88 (73)
I in. (mm)
3 00 (76)
3 00 (76)
3 00 (76)
3 00 (76)
3 38 (86)
3 38 (86)
Page 20 VRX-UM-00371-EN-02 August 2015
Dimensions
RVL Wafer
Cord Grip
E
Cord Grip
Cover
A
Conduit Adapter
Terminal Strip
Electronics Module
Three-Pin Connector
Flow Sensor Body
Size
1/2 in (12 7 mm)
3/4 in (19 05 mm)
1 in (25 4 mm)
1-1/2 in (38 1 mm)
2 in (50 8 mm)
3 in (76 2 mm)
RVL Tube
C
B
D
Figure 20: RVL wafer dimensions
A in. (mm)
5 85 (149)
5 90(150)
5 69 (145)
6 00 (152)
6 37 (162)
6 88 (175)
RVL (Wafer) Dimensions PP/PVC/CPVC/PVDF
B in. (mm)
0 78 (20)
C in. (mm)
2 03 (52)
0 94 (24)
1 19 (30)
1 50 (38)
1 88 (48)
2 50 (64)
2 03 (52)
2 25 (57)
2 63 (67)
3 22 (82)
4 25 (108)
D in. (mm)
1 75 (45)
1 75 (45)
1 75 (45)
1 75 (45)
1 75 (45)
1 75 (45)
Cord Grip
Cover
B
Conduit Adapter
Terminal Strip
Electronics Module
Three-Pin Connector
Flow Sensor Body
E in. (mm)
2 88 (73)
2 88 (73)
2 88 (73)
2 88 (73)
2 88 (73)
2 88 (73)
C
Tube Size
1/2 in (12 7 mm)
3/4 in (19 05 mm)
1 in (25 4 mm)
August 2015
A
A in. (mm)
1 31 (33 3)
1 31 (33 3)
1 44 (36 6)
Figure 21: RVL tube dimensions
B) in. (mm)
6 25 (158 8)
6 25 (158 8)
6 59 (167 4)
VRX-UM-00371-EN-02
C in. (mm)
4 87 (123 7)
4 66 (118 4)
5 42 (137 7)
Page 21
Troubleshooting
TROUBLESHOOTING
If difficulty is encountered, locate the symptom most likely present and follow the appropriate instructions
Current Loop
No Current Output
• Place a DC voltmeter across the two terminal block screws With the electronics module powered there must be at least
8V DC present If there is less than 8V DC, but more than 0V DC, check the power source for sufficient voltage to drive the
loop, as shown in
Figure 8 on page 12
◊ If there is 0V DC, present check for a broken wire or connector in the loop
• Check for the proper polarity of the current loop connections
• Make sure the receiving device is configured to provide source current to the electronics module
Zero Flow Indication (4 mA in Loop)
• Check that the flow is greater than the minimum specified for the particular size flow meter in use
◊ If the flow rate is too low, replace the flow meter with the proper size flow meter
◊ If the flow rate is sufficient, partially remove the electronic module Check that the three pin connector that connects
the electronics module to the flow transducers is positively connected See
Figure 22
Align and insert the connector on
to the bottom of the electronics module if it is disconnected
Terminal Strip
Electronics Module
Three-Pin Connector
Flow Sensor Body
Figure 22: Electrical connection
Erratic Flow Indication
• Check that there is at least 8V DC present across the two terminal block screws
• Check for material clogging the flow meter and in the upstream piping
• Check for erosion of the bluff body by sighting down the meters bore Erosion or damage to the bluff body causes erratic readings and compromise accuracy If the erosion continues, the flow meter will need to be periodically replaced
• Check upstream piping distance See
“Piping Requirements” on page 6
• Check for excessive pipe vibration Normal amounts of pipe vibration are easily tolerated The transmitter module contains a highly effective active filter that rejects false signals caused by pipe vibration This filter is most effective under flowing conditions If vibration is causing the meter to indicate flow when the flow is stopped it will most likely not cause error under flowing conditions The false flow indication may be ignored, or the pipe may be restrained by firm clamps
• Check for electrical noise Under some conditions there can be high common mode AC noise present between the fluid and the power supply ground The flow meter is designed to reject up to 50 volts of AC common mode noise without loss of accuracy If noise adjustment is used, accuracy is effected at low flow rates Place a ground strap on the pipe on both sides of the flow meter (the flow meter is made of non-conductive plastic) and connect them both to the one point where
the loop is grounded if metal piping is used See
“Wiring” on page 11
Use a grounding orifice if plastic piping is used The
transmitter module contains a highly effective active filter that will reject false signals due to high common mode voltage
This filter is most effective under flowing conditions If a false indication of flow is encountered at zero flow, it will probably not cause error under flowing conditions
Over-Stressed Sensor
The sensor can be over-stressed if the maximum permitted flow rate of 125% of recommended capacity (100% of HT meters) is exceeded
Page 22 VRX-UM-00371-EN-02 August 2015
Calibration Certificate Sample
CALIBRATION CERTIFICATE SAMPLE
Calibration Report
Unit Under Test (UUT) InformationE:
DescriptionE:
Model NumberE:
Serial NumberE:
Sensor TypeE:
Output typeE:
Minimum FlowE:
3/4” In-Line NPT End Flow Meter
RVL075-N 1 VNN
99999
Vortex Shedding
0-5V
2 1 GPM 7 9 LPM
Maximum FlowE:
25 GPM 94 6 LPM
Calibration DateE:
October 24, 2007
Calibration IntervalE: 12 Months
Cal. LiquidE:
Water
Ambient TemperatureE:
71 74 °F
Ambient HumidityE: 31 39 %RH
Linear PointsE:
5
UUT Calibration Data Table In GPME:
Flow
Standard
Actual
GPM
UUT
Hz
UUT
Temp °F
Visc cSt
1
1
1
1
1
25 00
18 00
12 00
6 00
2 10
100 000
75 000
50 000
25 000
10 000
72 00
72 00
72 00
72 00
72 00
0 949
0 949
0 949
0 949
0 949
Master MeterE:
Std uncertaintyE: ±0 25%
Traceability NoE: 30400/31801
Model NoE:
Serial NoE:
FT8-8N EXW-LEG-5/FT-16 NEXW-LEG-1
806890/16011903
Customer InformationE:
Customer NameE:
Customer No.E:
Order No.E:
UUT F/V
Hz/cSt
105 406
79 055
52 703
26 352
10 541
UUT K
CYC/GAL
240 00
250 00
250 00
250 00
285 71
(Hz*60)/NK
GPM
24 57
18 43
12 29
6 14
2 46
Nominal K (NK) 244.186
Linear
COEFF
1 0174
0 9767
0 9767
0 9767
0 8547
Raw Err
% FS
1 71
-1 71
-1 14
-0 57
-1 43
Calc
0-5V
5 000
3 600
2 400
1 200
0 420
Meas
0-5V
5 000
3 680
2 420
1 200
0 420
UUT Calibration Data Table In LPME:
Flow
Standard
Actual
GPM
UUT
Hz
UUT
Temp °F
Visc cSt
1
1
1
1
1
94 64
68 14
45 42
22 71
7 95
100 000
75 000
50 000
25 000
10 000
72 00
72 00
72 00
72 00
72 00
0 949
0 949
0 949
0 949
0 949
UUT F/V
Hz/cSt
105 406
79 055
52 703
26 352
10 541
UUT K
CYC/GAL
63 40
66 04
66 04
66 04
75 48
(Hz*60)/NK
GPM
93 01
69 76
46 51
23 25
9 30
Nominal K (NK) 64.507
Linear
COEFF
1 0174
0 9767
0 9767
0 9767
0 8547
Raw Err
% FS
1 71
-1 71
-1 14
-0 57
-1 43
Calc
0-5V
5 000
3 600
2 400
1 200
0 420
Meas
0-5V
5 000
3 680
2 420
1 200
0 420
Output
Err % FS
0 00
0 40
0 10
0 00
0 00
Output
Err % FS
0 00
0 40
0 10
0 00
0 00
StatusE:
Meter Accuracy (of FS)E:
PASS
± 0 4 %
Average Calib. Temperature E:
72 F
Average Calib. Specific Gravity E: 1
Average Calib. Viscosity E:
Flow Direction E:
0 95 cSt
Forward
Calibrated ByE:
Certified ByE:
Ramon Benedict
Larry Perez
Racine calibrations are performed using standards traceable to National Institute of Standards and Technology
The equipment and calibration procedures complies with ISO 9001
August 2015 VRX-UM-00371-EN-02 Page 23
Vortex Shedding Flow Meter, RVL Series
Control. Manage. Optimize.
Trademarks appearing in this document are the property of their respective entities Due to continuous research, product improvements and enhancements, Badger Meter reserves the right to change product or system specifications without notice, except to the extent an outstanding contractual obligation exists © 2015 Badger Meter, Inc All rights reserved
www.badgermeter.com
The Americas | Badger Meter | 4545 West Brown Deer Rd | PO Box 245036 | Milwaukee, WI 53224-9536 | 800-876-3837 | 414-355-0400
México | Badger Meter de las Americas, S.A. de C.V. | Pedro Luis Ogazón N°32 | Esq. Angelina N°24 | Colonia Guadalupe Inn | CP 01050 | México, DF | México | +52-55-5662-0882
Europe, Middle East and Africa | Badger Meter Europa GmbH | Nurtinger Str 76 | 72639 Neuffen | Germany | +49-7025-9208-0
Europe, Middle East Branch Office | Badger Meter Europe | PO Box 341442 | Dubai Silicon Oasis, Head Quarter Building, Wing C, Office #C209 | Dubai / UAE | +971-4-371 2503
Czech Republic | Badger Meter Czech Republic s.r.o. | Maříkova 2082/26 | 621 00 Brno, Czech Republic | +420-5-41420411
Slovakia | Badger Meter Slovakia s.r.o. | Racianska 109/B | 831 02 Bratislava, Slovakia | +421-2-44 63 83 01
Asia Pacific | Badger Meter | 80 Marine Parade Rd | 21-06 Parkway Parade | Singapore 449269 | +65-63464836
China | Badger Meter | 7-1202 | 99 Hangzhong Road | Minhang District | Shanghai | China 201101 | +86-21-5763 5412 Legacy Document: 09-VRX-UM-00362
