Omega Products FTB791-ND-BRASS Installation Manual

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TABLE OF CONTENTS
General Information .................................... 1
Product Description .................................... 2
Installation ...................................................2
Connections .................................................3
Operations ................................................... 4
Calibration ...................................................5
Maintenance ................................................ 6
Troubleshooting .......................................... 8
Specications .............................................. 9
Model Numbers ........................................ 14
Parts & Accessories ................................... 16
Warranty/Disclaimer ................................. 17
Return Requests/Inquiries ......................... 17
GENERAL INFORMATION
For best results, take the time to fully ac­quaint yourself with all information about all components of your FTB790 Series Turbine Meter System prior to installation and use. If you need assistance, contact the Omega Flow Application Department.
This symbol is used throughout the
!
manual to call your attention to safety
messages.
Warnings alert you to the potential for per-
sonal injury.
Cautions call your attention to practices or
procedures which may damage your equipment.
Notes give information that can improve
efciency of operations.
It is your responsibility to make sure that all operators have access to adequate instruc­tions about safe operating and maintenance procedures.
This manual will assist you in installing and maintaining your FTB790 Series turbine meter and associated display electronics. The turbine meters can be purchased with or without the display electronics. (See Figure 1)
Figure 1
Turbine Housing
Display Electronics
When purchased with the display electronics, optional accessory modules are available for eld installation. Information on these acces­sories is contained in separate manuals. Cali­bration details using the display electronics are given in this manual.
When purchased without the display (Sufx ­ND) an optional eld installable Pulse Output Module (FLSC790-P-ND) is available and described in a separate manual.
Read Me!
For your safety, review the major warnings and cautions below before operating your equipment.
1. This equipment is approved to handle only uids which are compatible with all wetted materials.
2. When measuring ammable liquids, ob-
serve precautions against re or explosion.
3. When handling hazardous liquids, always follow the liquid manufacturer’s safety precautions.
4. When working in hazardous environments, always exercise appropriate safety precau­tions.
5. Always dispose of used cleaning solvents in a safe manner according to the solvent manufacturer’s instructions.
6. During turbine removal, liquid may spill. Follow the liquid manufacturer’s safety precautions for clean up of minor spills.
7. Do not blow compressed air through the turbine.
8. Do not allow liquids to dry inside the turbine.
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9. Handle the rotor carefully. Even small scratches or nicks can affect accuracy.
10. When tightening the turbine, use a wrench only on the wrench ats.
11. For best results, always verify accuracy before use.
PRODUCT DESCRIPTION
FTB790 Series Turbines are identied by the internal diameter of the inlet and outlet.
FTB791 – 1/2 inch (Mid Flow) FTB792 – 3/4 inch (Mid Flow) FTB793 – 1 inch (Mid Flow) FTB794 – 1-1/2 inch (High Flow) FTB795 – 2 inch (High Flow)
Each of these turbines are designed to work with on-board display electronics and/or with one of several accessory modules that can interface to a wide variety of reporting and collecting devices.
The CMOS microprocessor-based electronics have extremely low power requirements and data retention capabilities in both RAM and ROM. Information is clearly displayed on a large 6-digit LCD readout with two-point oating decimal for totals from .01 to 999,999. All operations are easily accessed with the two buttons on the front panel.
Liquids flow through the turbine housing causing an internal rotor to spin. As the rotor spins, an electrical signal is generated in the pickup coil. The electrical signal provides the output necessary to operate the on-board display electronics for local indication directly on the turbine or one of several accessory modules that transmit the signal to external equipment.
Upon receipt, examine your meter for visible damage. The turbine is a precision measuring instrument and should be handled as such. Remove the protective plugs and caps for a thorough inspection. If any items are dam­aged or missing, contact OMEGA Customer Service.
Make sure the turbine model meets your spe­cic needs. Refer to the Specications Section and conrm the following:
1. The owrate is within the limits of your model.
2. The liquid is compatible with the turbine’s wetted components.
3. The system’s pressure does not exceed the turbine’s maximum pressure rating.
Information specic to your particular turbine, including serial number, model number, manufacturing date, and K-factor is etched into the surface of the turbine. On Models FTB791, FTB792, and FTB793 find the etched information on the side of the turbine. On Models FTB794 and FTB795 the informa­tion is etched on a wrench at.
SN = Serial Number, a 7-8 digit number that
identies this particular turbine.
MOD = Model number.
KF = K‑Factor given in pulses per gallon
(PPG).
MFD = Manufacturing Date indicating the
week and year of manufacture.
For your future reference, it might be useful to record this information in the manual in case it becomes unreadable on the turbine.
INSTALLATION
All Series FTB790 turbines are designed to measure ow in only one direction. The direc­tion is indicated by the arrow cast-molded in the turbine outlet. If the opposite direction is desired, and you are using on-board display electronics, rotate the display electronics 180 degrees prior to installation.
Flow altering devices such as elbows, valves, and reducers can affect accuracy. The fol­lowing recommended guidelines are given to enhance accuracy and maximize performance. Distances given here are minimum require­ments; double them for desired straight pipe lengths.
Upstream from the turbine, allow a minimum straight pipe length at least 10 times the in­ternal diameter of the turbine. For example, with the FTB793 turbine, there should be 10 inches (25.4 cm) of straight pipe immediately upstream. The desired upstream straight pipe length is 20 inches (50.8 cm).
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Downstream from the turbine, allow a mini­mum straight pipe length at least 5 times the internal diameter of your turbine. For ex­ample, with the FTB793 turbine, there should be 5 inches (12.7 cm) of straight pipe imme­diately downstream. The desired downstream distance is 10 inches (25.4 cm).
A typical back pressure of 5 to 50 PSI (0.34 to
3.4 bar) will prevent cavitation. Create back pressure by installing a control valve on the downstream side of the meter at the proper distance detailed above.
Foreign material in the liquid being measured can clog the turbine’s rotor and adversely af­fect accuracy. If this problem is anticipated or experienced, install screens to lter impurities from incoming liquids.
Models FTB791, FTB792, FTB793
Maximum Particulate Size Inches: 0.005 Microns: 125 Mesh: 55 Standard Sieve: 125 µm Alternative Sieve: No. 120
Models FTB794 and FTB795
Maximum Particulate Size Inches: 0.018 Microns: 500 Mesh: 28 Standard Sieve: 500 µm Alternative Sieve: No. 35
All Series FTB790 turbines are Factory Mu­tual Approved and carry a Class 1, Division 1 Approval for hazardous environments. They are tested and calibrated at the factory using state-of-the-art calibration procedures and test equipment.
To ensure accurate measurement, remove all air from the system before use. To purge the system of air:
1. Ensure some back pressure on the turbine.
2. Open the discharge valve or nozzle and allow uid to completely ll the system. Make sure the stream is full and steady.
3. Close the discharge valve or nozzle.
4. Start normal operations.
Each turbine contains a removable back cov­erplate. Leave the coverplate installed unless accessory modules specify removal.
CONNECTIONS
1. To protect against leakage, seal all threads with an appropriate sealing compound. Make sure the sealing compound does not intrude into the ow path.
2. Make sure the arrow on the outlet is pointed in the direction of the ow.
3. Tighten the turbine onto the ttings. Use a wrench only on wrench ats.
NOTE: If connecting to new male threads,
burrs and curls can adversely effect accuracy. Correct the problem prior to turbine installation.
It is strongly recommended that accuracy be veried prior to use. To do this, remove all air from the system, measure an exact known volume into an accurate container, and verify the volume against the readout or recording equipment. If necessary, use a correction factor to gure nal volume. For best results, accuracy should be veried periodically as part of a routine maintenance schedule.
The display electronics is normally installed on the turbine housing at the factory unless ordered without it.
If for any reason the display electronics need to be mounted on your turbine, simply mount the display on the turbine with the four screws at the corners of the faceplate. Make sure the seal is fully seated before tightening the screws.
If you ordered the FTB790 Series turbine with an accessory module, please review and thor­oughly understand all installation instructions before proceeding.
Avoid electronically “noisy” environments. Install at least 6 inches (15.2 cm) away from motors, relays, or transformers.
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OPERATIONS
All operations are reected in the LCD read­out. The large center digits indicate amounts, where smaller words or “icons” located above and below indicate specific information regarding totals, ow, calibration and units of measure.
Flowrate Feature
To use this feature, press and release DIS­PLAY button until FLOWRATE icon appears. The factory set time base will be highlighted to the right of FLOWRATE (M = Minutes, H = hours, D = days). When FLOWRATE is invoked, the display will be indicating rate of ow.
Activate the Meter
The computer is on continuously and always ready to perform. The computer is powered by eld replaceable batteries. When display becomes dim, faded or the low battery mes­sage appears (see below), the batteries need to be replaced. Reference the Maintenance Section for details.
Batch and Cumulative Totals
The computer maintains two totals.The Cumu­lative Total provides continuous measurement and cannot be manually reset. The Batch Total can be reset to measure ow during a single use. The Cumulative Total is labeled TOTAL 1, Batch Total is labeled TOTAL 2 BATCH.
When the Cumulative Total reaches a display reading of 999,999 the computer will highlight an X10 icon. This indicates to the operator that a zero must be added to the 6 digits shown. When the next rollover occurs, the computer will highlight an X100 icon. This indicates to the operator that two zeroes must be added to the 6 digits shown.
Press the DISPLAY button briey to switch between the TOTAL 1, TOTAL 2 BATCH and FLOWRATE. Press DISPLAY briey to display the TOTAL 2 BATCH. Hold the DISPLAY button for 3 seconds to reset the Batch Total to zero.
When uid is owing through the meter, a small propeller icon is highlighted.
Factory and Field Calibration
All calibration information is visible to the user as icons on the top line of the display, above the numeric digits.
All units are congured with a “factory” calibration. Both gallons and litres are avail­able (“GL” or “LT” will be displayed). While holding the CALIBRATE button, briey press DISPLAY to toggle between gallons and litres. This factory calibration (indicated with FAC) is permanently programmed into the computer and is not user adjustable.
NOTE: Your computer may have other units of
measure programmed into it. If so, holding the CALIBRATE button and momentarily pressing the DISPLAY button will toggle through all factory set units. Other pos­sible units are: IGL (imperial gallon), QT (quart), CF (cubic feet), CM (cubic meter), BL (42 gal. barrel), CC (cubic centimeter) or OZ (ounce).
Switching between different units will not corrupt the Total’s contents. For example, in GL mode, the computer totalizes 10.00 gallons, if the user switches to LT mode, the display will read 37.85 litres (the same volume, dif­ferent unit).
The “eld” calibration may be set by the user, and can be changed or modied at any time using the calibration procedure described in the Calibration Section. Totals or owrate derived from the eld calibration are invoked when the FAC icon is no longer visible on the top line of the display.
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CALIBRATION
Verify Accuracy Before Beginning Field Calibration
For the most accurate results, dispense at a owrate which best simulates your actual oper­ating conditions. Avoid “dribbling” more uid or repeatedly starting and stopping the ow. This can result in less accurate calibrations.
Make sure you meet the meter’s minimum owrate requirements:
1/2 inch meter 1 GPM (3.8 LPM) 3/4 inch meter 2 GPM (7.5 LPM) 1 inch meter 5 GPM (18.8 LPM) 1-1/2 inch meter 10 GPM (37.5 LPM) 2 inch meter 20 GPM (76 LPM)
The use of a uniformly dependable, accurate calibration container is recommended for the most accurate results. Due to high owrate, it is strongly recommended that calibration be completed with a combination of volume and weight using ne resolution scales. For best results, the meter should be installed and purged of air before eld calibration.
Field Calibration with Computer Display
Field Calibration and Factory Calibration are dened in the Operation Section. Factory calibration settings are programmed into each computer during manufacturing, using stod­dard test solvent at 70° F (21° C). Settings are correct for light liquids such as water, gasoline or diesel. Readings using the Factory Calibration (FAC) may not be accurate in some situations, for example, “heavy” liquids such as motor oil under extreme temperature condi­tions, non-standard plumbing congurations or with uids other than water.
For improved accuracy under such conditions, the computer allows for “eld” calibration, that is, user entry of custom calibration parameters. A “single point” calibration may yield accept­able accuracy when used in a non-standard application.
Field Calibration Procedures (Dispense/Display Method)
1. To eld calibrate, press and hold the CALI­BRATE and DISPLAY buttons for about 3 seconds until you see FLdCAL. Release both buttons and you will see dd000.0. You are now in the eld calibration mode.
2. Dispense a known amount of uid at a owrate representative of the application. Any amount between 000.1 and 999.9 units can be used. Display will count up while uid is owing through the meter.
3. The DISPLAY button can then be pushed to select the digit location and the CALI­BRATE button can be pushed to scroll the desired value at the blinking position. Edit the amount shown with the value that was dispensed above. Values from 000.1 to 999.9 can be entered.
4. When satised with the value, press both CALIBRATE and DISPLAY buttons si­multaneously. CALEnd will be displayed and unit will go back to normal operation, less the FAC (factory calibration) icon.
5. The meter will now be operating with a custom calibration number unique to the above dispense procedure. No unit of measure (gallon, litre, etc.) icon will be highlighted
NOTE: To return to factory calibration (FAC),
press and hold both CALIBRATION and DISPLAY buttons for about 3 seconds, until FAcCAL is displayed. Then release buttons. Unit should return to normal operation and FAC icon visible
NOTE: If the eld calibration mode is entered
and NO uid is dispensed, then upon leav­ing, the computer will use data from the last successful eld calibration.
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MAINTENANCE
Verify Accuracy
Before use, check the turbine’s accuracy and verify calibration.
1. Make sure there is no air in the system.
2. Measure an exact known volume into an accurate container.
3. Verify the volume against the readout or recording equipment.
NOTE: If necessary, use a correction factor to
gure nal volume.
For best results, accuracy should be veried periodically as part of a routine maintenance schedule.
Remove the Turbine
! ! ! WARNING ! ! !
!
During turbine removal, liquid may spill. Follow the liquid manufacturer’s safety precautions for clean up of minor spills.
1. Ensure all liquid is drained from the tur-
bine. Wear protective clothing as necessary.
2. Loosen both ends of the turbine. Use a
wrench only on the turbine’s wrench ats.
3. If the turbine is not immediately installed
again, cap lines as necessary.
2. Carefully clean residue off all parts. Re­move internal parts as detailed above. Note orientation carefully for correct assembly. Internal parts can be soaked for 10-15 minutes in compatible cleaning solutions. Use a soft brush or small probe to carefully remove residue from the rotor.
3. Using a small tool such as a screw driver or awl, gently pry one retaining ring from its groove. Remove the support. If neces­sary, use needle nose pliers. Little or no force should be required.
4. Carefully remove the rotor.
CAUTION: Handle the rotor care fully.
Even small scratches or nicks can affect accuracy.
5. Turn the turbine over and remove the other retaining ring. Remove the other support.
6. Clean, as detailed below, or discard as necessary.
7. Replace one support and retaining ring. Parts should drop easily into place with little or no force.
8. Install the rotor. Make sure the wide end of the rotor’s blades faces the ow direc­tion. (See Figure 3)
Figure 3
Wide End of Rotor Blade
Replace Internal Parts
1. Remove the turbine from the system as detailed above.
NOTE: Carefully notice the orientation of
all internal parts as they are removed, especially the orientation of the rotor to the ow direction arrow. (See Figure 2)
Figure 2
Support
Rotor
Retaining Ring
6
Support
Retaining Ring
Flow Direction Arrow
9. Turn the turbine over and drop the second support into place. Put the nal retaining ring into position.
10. Reinstall the turbine, purge the system of air, and verify accuracy before use.
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Clean the Turbine
During use, the turbine should be kept full of liquid to ensure that drying does not occur inside the turbine. If drying or caking should occur, the rotor will stick or drag, affecting accuracy. To determine if the rotor is stuck or dragging, gently blow air through the meter and listen for the quiet whir of the rotor.
CAUTION: Never blow compressed air
through the meter. It could damage the rotor.
1. Remove the turbine from the system fol­lowing the directions above.
! ! ! WARNING ! ! !
!
Follow the liquid manufacturer’s instruc‑ tions for the disposal of contaminated cleaning solvents.
2. When the rotor turns freely, assemble and install it again following the instructions above.
Display Electronics
The display electronics are powered by lithium batteries which provide at least 4 years of actual use. If the meter’s readout should become dim, blank or the low battery message appears (see below), the batteries should be replaced. Replacement batteries can be ordered from the factory. See details in the Parts Section.
Replacing the Batteries
1. Remove the corner screws from the meter face and lift the display electronics from the turbine.
2. Remove the batteries.
3. Check the battery terminals and remove any corrosion.
4. Install the new batteries and make sure the positive posts are positioned correctly. When the batteries are installed correctly, the computer powers on automatically and the readout displays information.
5. Make sure the seal is fully seated before placing the computer electronics on the turbine. Tighten the four screws.
When batteries are disconnected or fail, values in Batch and Cumulative Totals will remain. Factory and Field Calibration Curves are retained in the meter’s computer when power is lost.
It is strongly recommended that battery check and terminal cleaning be a part of a routine maintenance schedule. Battery terminals should be cleaned annually. Batteries can be replaced without removing the meter from the piping system.
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TROUBLESHOOTING
Symptom Probable Cause Corrective Action
Meter is not accurate 1. Field Calibration not perform- Field calibrate again or select Factory ed properly Calibration.
2. Factory Calibration not suit- Perform a Field Calibration according to able for liquid being measured Calibration Section.
3. Meter operated below mini- Increase owrate. mum owrate
4. Meter partially clogged with Remove meter. Clean carefully. Make sure dried liquid rotor spins freely.
5. Turbine bearings partially Remove meter. Clean carefully. Make sure clogged with dried liquid rotor spins freely.
6. Sealant material wrapped Remove meter. Make sure rotor spins freely. around rotor
7. Installed too close to ttings Install correctly.
8. Installed too close to motors Install correctly. or electrically “noisy” envi­ ronment
9. Improper connections to Check all electrical connections. Reference recording device appropriate installation instructions.
10. Accuracy needs verication Complete normal accuracy verication procedures. Repeat periodically.
Readout faded or 1. Batteries weak, dead, or not Remove display electronics. Check and blank connected replace batteries if necessary.
2. Display electronics defective Contact the factory.
Normal owrate 1. Field Calibration not perform- Field Calibrate again or select Factory but meter does not ed correctly Calibration. count (Meter comes
2. Rotor stuck or damaged Remove meter. Make sure rotor spins freely. on when DISPLAY
button pushed)
3. Sealant material wrapped Remove meter. Make sure rotor spins freely. around rotor
4. Display electronics defective Contact the factory.
Reduced owrate 1. Meter clogged with dried Remove meter. Clean carefully. Make sure and meter does not liquids rotor spins freely. count (Meter comes on when DISPLAY 2. Below minimum owrate Increase ow. button pushed)
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SPECIFICATIONS - STAINLESS STEEL
All data on Models FTB791, FTB792, and FTB793 determined with 1 centipoise stoddard solvent test uid at 70° F (21° C). Data on Models FTB794 and FTB795 is determined with water at 70° F (21° C).
Models FTB791 FTB792 FTB793 FTB794 FTB795 Size 1/2 in. 3/4 in. 1 in. 1‑1/2 in. 2 in.
Linear Flow Range Gallons/minute (GPM) 1-10 2-20 5-50 10-100 20-200 Liters/minute (LPM) 3.8-37.9 7.6-75.7 18.9-190 38-380 76-760
Extended Flow Range Gallons/minute (GPM) 0.5-10 1-20 2.5-50 5-100 10-200 Liters/minute (LPM) 1.9-37.9 3.8-75.7 9.5-190 19-380 38-760
Maximum Flow Gallons/minute (GPM) 15 30 75 150 300 Liters/minute (LPM) 56.8 113.6 284 568 1,136
Fluid Velocity in Extended Range Feet/second 0.5-10.6 0.6-12.1 0.93-18.6 0.8-15.9 0.96-19.1 Meters/second 0.2-3.2 0.2-3.7 0.28-5.7 0.24-4.8 0.29-5.8
Maximum Pressure Drop in 10:1 Range PSIG 8 7.5 5 4 4 bar 0.55 0.5 0.34 0.28 0.28
Frequency Range in Linear Flow Range 45-450 Hz 37-370 Hz 45-475 Hz 35-350 Hz 33-330 Hz
Connections NPT Female Inlet/Outlet Size 1/2 in. 3/4 in. 1 in. 1-1/2 in. 2 in. Wrench Size: Inch 1-1/16 in. 1-5/16 in. 1-5/8 in. 2-3/8 in. 3 in. Millimeter 27 mm 33 mm 41 mm 60 mm 75 mm
Weight* Pounds 1.8 lbs. 2.0 lbs. 2.4 lbs. 4.0 lbs. 6.3 lbs. Kilograms 0.8 kg 1.0 kg 1.1 kg 1.8 kg 2.9 kg
* Display electronics add 0.2 lbs. (0.1 kg) to total weight.
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SPECIFICATIONS - STAINLESS STEEL continued
Performance
Linear Range for 1/2 in. and 3/4 in.: 10:1 @ ±2.0% of reading Linear Range for 1 in.: 10:1 @ ±1.5% of reading Linear Range for 1-1/2 in. and 2 in: 10:1 @ ±1.0% of reading Extended Range: 20:1 @ ±5.0% of reading Repeatability: ±0.1%
Pressure Rating 1,500 PSIG (103 bar)
Wetted Components
Housing: 316 Stainless Steel Journal Bearings: Ceramic (96% Alumina) Shaft: Tungsten Carbide Rotor and Supports: PVDF Retaining Rings: 316 Stainless Steel
Temperature Range Turbine only without computer: -40° to +250° F (-40° to +121° C) Turbine with display electronics: 0° to +140° F (-18° to +60° C) (Display electronics or accessory modules determine nal operational temperature.)
A
B
Dimensions
Models FTB791 FTB792 FTB793 FTB794 FTB795 Size 1/2 in. 3/4 in. 1 in. 1‑1/2 in. 2 in.
A = Height:
Inches 1.8 in. 2.0 in. 2.2 in. 2.8 in. 3.2 in. Centimeters 4.6 cm 5.1 cm 5.6 cm 7.1 cm 8.2 cm
B = Width
Inches 2.0 in. 2.0 in. 2.0 in. 2.7 in. 3.3 in. Centimeters 5.1 cm 5.1 cm 5.1 cm 6.9 cm 8.4 cm
C = Length
Inches 4.2 in. 4.3 in. 4.5 in. 5.3 in. 6.3 in. Centimeters 10.7 cm 10.9 cm 11.4 cm 13.5 cm 16.0 cm
Display electronics add 0.7 in. (1.8 cm) to height of turbine.
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SPECIFICATIONS - BRASS
All data on FTB791-BRASS, FTB792-BRASS, and FTB793-BRASS determined with 1 centipoise stoddard solvent test uid at 70° F (21° C). Data on FTB794-BRASS and FTB795­BRASS is determined with water at 70° F (21° C).
Models FTB791‑ FTB792‑ FTB793‑ FTB794‑ FTB795‑ BRASS BRASS BRASS BRASS BRASS Size 1/2 in. 3/4 in. 1 in. 1‑1/2 in. 2 in.
Linear Flow Range Gallons/minute (GPM) 1-10 2-20 5-50 10-100 20-200 Liters/minute (LPM) 3.8-37.9 7.6-75.7 18.9-190 38-380 76-760
Extended Flow Range Gallons/minute (GPM) 0.5-10 1-20 2.5-50 5-100 10-200 Liters/minute (LPM) 1.9-37.9 3.8-75.7 9.5-190 19-380 38-760
Maximum Flow Gallons/minute (GPM) 15 30 75 150 300 Liters/minute (LPM) 56.8 113.6 284 568 1,136
Fluid Velocity in Extended Range Feet/second 0.5-10.6 0.6-12.1 0.93-18.6 0.8-15.9 0.96-19.1 Meters/second 0.2-3.2 0.2-3.7 0.28-5.7 0.24-4.8 0.29-5.8
Maximum Pressure Drop in 10:1 Range PSIG 8 7.5 5 4 4 bar 0.55 0.5 0.34 0.28 0.28
Frequency Range in Linear Flow Range 45-450 Hz 37-370 Hz 45-475 Hz 35-350 Hz 33-330 Hz
Connections NPT Female Inlet/Outlet Size Yes Yes Yes Yes Yes Female Yes Yes Yes Yes Yes Inlet/Outlet Size 1/2 in. 3/4 in. 1 in. 1-1/2 in. 2 in. Wrench Size: Inch 1-1/16 in. 1-5/16 in. 1-5/8 in. 2-3/8 in. 3 in. Millimeter 27 mm 33 mm 41 mm 60 mm 75 mm
Weight* Pounds 2.0 lbs. 2.3 lbs. 2.7 lbs. 6.0 lbs. 9.6 lbs. Kilograms 0.9 kg 1.0 kg 1.2 kg 2.7 kg 4.3 kg
* Computer electronics add 0.2 lbs. (0.1 kg) to total weight.
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SPECIFICATIONS - BRASS continued
Performance
Linear Range for 1/2 in. and 3/4 in.: 10:1 @ ±2.0% of reading Linear Range for 1 in.: 10:1 @ ±1.5% of reading Linear Range for 1-1/2 in. and 2 in: 10:1 @ ±1.0% of reading Extended Range: 20:1 @ ±5.0% of reading Repeatability: ±0.1%
Pressure Rating 300 PSIG (21 bar)
Wetted Components
Housing: Brass Journal Bearings: Ceramic (96% Alumina) Shaft: Tungsten Carbide Rotor and Supports: PVDF Retaining Rings: 316 Stainless Steel
Temperature Range Turbine only without computer: -40° to +250° F (-40° to +121° C) Turbine with display electronics: 0° to +140° F (-18° to +60° C) (Display electronics or accessory modules determine nal operational temperature.)
A
B
Dimensions
Models FTB791‑ FTB792‑ FTB793‑ FTB794‑ FTB795‑ BRASS BRASS BRASS BRASS BRASS Size 1/2 in. 3/4 in. 1 in. 1‑1/2 in. 2 in.
A = Height:
Inches 1.8 in. 2.0 in. 2.2 in. 2.8 in. 3.2 in. Centimeters 4.6 cm 5.1 cm 5.6 cm 7.1 cm 8.2 cm
B = Width
Inches 2.0 in. 2.0 in. 2.0 in. 2.7 in. 3.3 in. Centimeters 5.1 cm 5.1 cm 5.1 cm 6.9 cm 8.4 cm
C = Length
Inches 4.2 in. 4.3 in. 4.5 in. 5.3 in. 6.3 in. Centimeters 10.7 cm 10.9 cm 11.4 cm 13.5 cm 16.0 cm
Computer electronics add 0.7 in. (1.8 cm) to height of turbine.
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SPECIFICATIONS continued
Display Specifications
Input Pulse Rate:
Minimum Pulse In: DC Minimum Coil Input: 10 Hz Maximum Raw: 1,000 Hz
K‑Factor:
Minimum: .01 pulses/unit Maximum: 999,999 pulses/ unit
Field Calibration:
Minimum Time: 10 seconds
Readout Totals:
Minimum Display: 0.01 Maximum Display: 999,999
Temperatures:
Operational: 0° to +140° F (-18° to +60° C) Storage: -40° to +158° F (-40° to +70° C) If wider operating temperature ranges are desired, reference information on Remote Kits.
Power:
Internal Power Supply: 2 Lithium Batteries at 3 volts each Battery Life: 5 years Optional External Power: 7-30 VDC
Display Electronics Terminal
Connections
J 1
J 10
J‑1 Reset
When connected by a jumper wire
to Ground (J1-6), this has the same effect as initial power up and zeroes out all totalizers.
J‑2 Pulse Signal Output
This supplies a high-level amplied
open collector signal. Output will withstand a maximum open-circuit voltage of 60 volts DC and a maxi­mum closed-circuit of 100 mA.
J‑3 Not Used
J‑4 Pulse Signal Input
Requires a sine or square wave with
open-circuit voltage of 3-30 volts P-P, a maximum rise/fall rate of
0.01 V/µ second and a maximum frequency of 750 Hz.
J‑5 Power Input
When used with Ground (J1-6),
this has reverse polarity protection, but no on-board voltage regulation. Supplied voltage must be 5.75 volts DC ±5%.
J‑6 Ground
J‑7, 8, Programming interfaces. Not access- 9, 10 able to user.
NOTE: Safety approvals are void if any
external connections are made to computer electronics.
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SPECIFICATIONS continued
MODEL NUMBERS - STAINLESS STEEL
Extended Model No. Model No.* Range Range FNPT w/Display w/o Display GPM (LPM) Low Flow† Size
FTB791 FTB791-ND 1-10 0.5 1/2" (3.8-37.9) (1.9)
FTB792 FTB792-ND 2-20 1 3/4" (7.6-75.9) (3.8)
FTB793 FTB793-ND 5-50 2.5 1" (19-190) (9.5)
FTB794 FTB794-ND 10-100 5 1-1/2" (38-380) (9.0)
FTB795 FTB795-ND 20-200 10 2" (76-760) (38)
* Requires signal output module P/N - FLSC790-P-ND ordered separately. † Extended low ow range and eld calibration for viscosity available on - ND units w/o display.
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MODEL NUMBERS - BRASS
Extended Model No. Model No.* Range Range FNPT w/Display w/o Display GPM (LPM) Low Flow† Size
FTB791- FTB791-ND- 1-10 0.5 1/2" BRASS BRASS (3.8-37.9) (1.9)
FTB792- FTB792-ND- 2-20 1 3/4" BRASS BRASS (7.6-75.9) (3.8)
FTB793- FTB793-ND- 5-50 2.5 1" BRASS BRASS (19-190) (9.5)
FTB794- FTB794-ND- 10-100 5 1-1/2" BRASS BRASS (38-380) (9.0)
FTB795- FTB795-ND- 20-200 10 2" BRASS BRASS (76-760) (38)
* Requires signal output module P/N - FLSC790-P-ND ordered separately. † Extended low ow range and eld calibration for viscosity available on - ND units w/o display.
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PARTS & ACCESSORIES
Order Replacement Kits with the part numbers given here.
Part Number Description
FTB890-ORING O-Ring FTB791-RK (1/2 inch) Rotor/Support Replacement Kit FTB792-RK (3/4 inch) Rotor/Support Replacement Kit FTB793-RK (1 inch) Rotor/Support Replacement Kit FTB794-RK (1-1/2 inch) Rotor/Support Replacement Kit FTB795-RK (2 inch) Rotor/Support Replacement Kit FTB791-RETAINING (1/2 inch) Retaining Ring FTB792-RETAINING (3/4 inch) Retaining Ring FTB793-RETAINING (1 inch) Retaining Ring FTB794-RETAINING (1-1/2 inch) Retaining Ring FTB795-RETAINING (2 inch) Retaining Ring
Field Installable Options and Accessories
Model Number Description
FLSC790-MA 4-20 mAdc Output Module FLSC790-P Pulse Output Module (open collector output) FLSC790-P-DC External Power Module for FLSC790-P (9-30Vdc) FTB790-RK Remote Display Kit Module FTB790-RK-FM FM Approved Remote Display Kit Module FLSC790-BATT Replacement Batteries FLSC790-P-ND Pulse Output for Models without Displays (-ND sufx) (open collector output)
Except as noted, Options and Accessories are for Display Models only and only one Module may be installed per unit. All models are supplied with 10 ft. cable. Cable may be cut or extended as required. Customer supplied pull-up resistor required, 820 ohm (min).
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M-4908/0410
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