Omega Products FTB791-ND-BRASS Installation Manual
TABLE OF CONTENTS
General Information .................................... 1
Product Description .................................... 2
Installation ...................................................2
Connections .................................................3
Operations ................................................... 4
Calibration ...................................................5
Maintenance ................................................ 6
Troubleshooting .......................................... 8
Specications .............................................. 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
efciency 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 (Sufx 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 identied 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 specic needs. Refer to the Specications Section
and conrm 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 specic 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
identies 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
veried 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 veried 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 reected 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 briey to switch
between the TOTAL 1, TOTAL 2 BATCH
and FLOWRATE. Press DISPLAY briey
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 congured with a “factory”
calibration. Both gallons and litres are available (“GL” or “LT” will be displayed). While
holding the CALIBRATE button, briey 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 modied 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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