Omega Products FTB381-ND User Manual
TURBINE FLOWMETERS FOR FUEL
With Local Digital Display
FTB380 Series
FM
APPROVED
U Indicates Both Rate
and Total
U Up to 1.5%
Reading Accuracy
U 6-Digit Display
U Signal Output Capabilities
U Reads GPM or LPM
(Field Selectable)
U Battery Operated
(Included)
FTB383
F
FTB380 Series turbine meters with
microprocessor-based electronics
offers a durable, compact, highprecision fuel measurement device,
with total and rate indication.
Information is clearly displayed on
a large 6-digit liquid crystal display
with only 2-point floating decimal
for totals from 0.01 to 999,999.
All operations are easily performed
with only 2 buttons.
The basic unit and display are
powered by 2 lithium batteries,
providing up to 4000 hours of use.
Automatic “on” and “off” extend
battery life. Manual “on” allows
view of the display on demand.
Cumulative total, batch total, and
rate of flow are standard. A singlepoint field calibration curve can be
stored in memory.
The turbine meter can also be
ordered without display electronics.
A special pulse output model
(FLSC790-P-ND) must be ordered
to obtain an open collector current
sinking output operated on 9 to
35 Vdc. The output is a square wave
pulse with a 3-wire connection.
Accessories for Turbine
Meters with the Display
The FLSC790-P pulse output
module provides an unscaled open
collector sinking output operating on
an applied voltage of 0 to 60 Vdc.
The output is a square wave pulse
with an amplitude the same as the
supplied voltage.
The FTB790-RK-FM is an FM
approved remote kit. It allows the
display electronics to be mounted in
a hazardous area up to 30 m (100')
from the turbine meter and for fluid
temperatures of -40 to 121°C
(-40 to 250°F).
The FLSC790-BATT is the
replacement battery for the
display electronics. Batteries
provide 4000 hours of use.
The FLSC790-90D is a 90°
mounting adaptor designed to allow
displays to be mounted 90° from the
standard position.
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SPECIFICATIONS
Accuracy:
FTB381: ±5% rdg
FTB383, FTB385: ±1.5% rdg
Repeatability:
FTB381: ±1%
FTB383, FTB385: ±0.2%
Pressure Rating: 300 psig (21 bar)
With Remote Electronics Kit:
-40 to 121°C (-40 to 250°F)
Temperature Range (Without Remote
Electronics): -10 to 60°C (14 to 140°F)
Viscosity: Rated accuracy for fuels or
fluids with viscosity of (1 cSt); meters
with display can be used for fluids up to
100 cSt with field calibration
Wetted Components:
Housing: Aluminum
Journal Bearings: Ceramic
(96% alumina)
Shaft: Tungsten carbide
Rotor and Supports: Nylon
Retaining Rings: 316 SS
Display: 6-digit LCD indicates flow rate,
batch and cumulative total
Battery Life: 4000 hours
FM Approvals: Turbine meters with
display and no accessories or with the
FLSC790-RK-FM are FM approved for
Class 1, Div. 1 hazardous environments
Note: Other outputs and accessories are not
designed for hazardous environments.
FTB385
A
C
B
Dimensions: cm (inch)
CALIBRATE
DISPLAY
Dimensions
Models FTB381, FTB383 FTB385
Size 1" 2"
A = Height* 6.3 cm (2.5") 11.4 cm (4.25")
B = Width 5.1 cm (2.0") 7.6 cm (3.0")
C = Length 10.1 cm (4.0") 15.2 cm (6.0")
* Height includes 1.8 cm (0.7") for the computer electronics.
To Order Visit omega.com/ftb380 for Pricing and Details
Typical Shipping
Range FNPT K-Factor Recommended Weight
Model No. Description GPM (LPM) Size Pul/Gal Strainer Size kg (lb)
FTB381 Aluminum turbine 0.3 to 3 1* 2200 55 mesh 0.61 (1.35)
low flow with display (1 to 11)
FTB383 Aluminum turbine 3 to 50 1* 730 28 mesh 0.61 (1.35)
mid-range with display (11 to 190)
FTB385 Aluminum turbine 30 to 300 2 72 28 mesh 1.36 (3.0)
high flow with display (114 to 1135)
FTB381-ND Aluminum turbine 0.3 to 3 1* 2200 55 mesh 0.61 (1.35)
low flow, no display (1 to 11)
FTB383-ND Aluminum turbine 3 to 50 1* 730 28 mesh 0.61 (1.35)
mid-range, no display (11 to 190)
FTB385-ND Aluminum turbine 30 to 300 2 72 28 mesh 1.36 (3.0)
high flow, no display (114 to 1135)
* For units with BSPP threads add “-BSPP” to model number, no additional cost.
Field Installable Options and Accessories
Model No. Description
FLSC790-P-ND Pulse output for models without displays (“-ND” suffix); open collector output
FLSC790-P Pulse output module; open collector output
FTB790-RK-FM FM approved remote display kit module
FLSC790-BATT Two 3V replacement batteries
FLSC790-90D 90º display mounting adaptor
Comes complete with two 3V lithium batteries installed, and operator’s manual.
Ordering Examples: FTB381, 1 FNPT aluminum turbine for 0.3 to 3 GPM.
FTB383-ND, 1 FNPT aluminum turbine for 3 to 50 GPM and FTB790-RK-FM, FM approved remote display kit.
F-2
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