Omega Products FD-400 User Manual

ULTRASONIC DOPPLER FLOWMETER

FD-400 Series

Standard

U Non-Intrusive,

Clamp-On Transducer
for Most Pipes from 6 to
3050 mm (¹⁄₃ to 120")

Inser

U

U

U

U

U

U Provisions for Up to

U NIST Certificate

tion Probe
Transducer Also
Available

Wide Measuring Rang

0.05 to 9 mps
(0.15 to 30 fps)

Accurac

y: ±2% of

Calibrated Span
Configuration and

Total
Stored in Non-Volatile
Flash ROM

NEMA 4X (IP66)
Outdoor Enc

losure

4 Meters in a Single
Piping System

e of

E

The FD-400 Series ultrasonic
doppler flowmeters measure the
flow of liquids that contain sound
reflectors, suspended solids, or gas
bubbles larger than 100 microns.
These sophisticated instruments
automatically adjust filtering and
gain settings to produce reliable
readings in a wide range of liquid
and reflector conditions.

The FD-400 flowmeter transmitts
ultrasonic sound through the pipe
wall or from the probe tip into the
flowing liquid by using piezoelectric
crystals contained in the transducer
and probe tip. The sound is then
reflected by sonic reflectors
suspended in the liquid and
recorded by the receiver. If the
sonic reflectors are moving within
the sound transmission path, sound
waves will be reflected at a
frequency shifted (Doppler
frequency) from the transmitted
frequency. The difference between
the 2 frequencies is directly
proportional to the speed of the
sonic reflectors, resulting in a liquid
flow rate that is converted to various
user-defined units.

FD-400, shown smaller than actual size.

FD-400C-SML, shown
smaller than actual size.

Configuration of the FD-400 is
accomplished via the front-panel
keypad. A 2-line backlit LCD
displays rate and total in
user-selected units. Power supply
options include AC and DC. Optional
outputs include 4 to 20 mA, relays,
and rate pulse. Two transducer
styles are available. The FD-400C
clamp-on, non-intrusive transducer
is recommended for most metal or
plastic pipes. The FD-400C has a

E-X

FD-400C-STD, shown
smaller than actual size.

NEMA 6P (IP68) rating and is
available in a high-temperature
version, “HT”. The user can place
these clamp-on transducers up
to 305 m (1000') from the display
enclosure. The FD-400I insertion
probe transducer should be used
on piping systems that do not
permit ultrasonic penetration. The
FD-400I inserts into the pipe wall
and comes into direct contact with
the flowing liquid.

SPECIFICATIONS

FD-400C-STD

(4.38)

FD-400C-SML

Coaxial cables

FD-400C-SML-HT

36.8

(1.45)

102.9
(4.05)

72.4

(2.85)

35

(1.38)

Max
Pipe
Dia.

Wall Mount

7.1 (0.28) Dia.
(4 places)

79.5

(3.31)

39.4

(1.55)

154.4 (6.08)

171.2 (6.74)

54.1

(2.13)

8.9 (0.35)

FD-400C-STD-HT

GENERAL

Measuring Principle:

Doppler ultrasonic
Flow Velocity Range:

0.05 to 9 mps (0.15 to 30 fps)
Accuracy:
±2% FS over calibrated span
Liquid Types: Liquids containing
100 ppm of useful sonic-suspended
reflectors greater than 100 microns
(see page E-4 for details)

MONITOR

Enclosure: NEMA 4X (IP66),

polycarbonate, stainless steel, brass,
plated-steel mounting brackets
Dimensions: 178 H x 146 W x 99 mm D
(7.00 x 5.75 x 3.88")
Power Supply: 115/230 Vac,
50/60 Hz ±15% @ 5 VA max;
12 to 28 Vdc @ 2.5 VA max

Display: 2-line x 8-character LCD;
LED backlighting; top row, 7-segment
18 mm (0.7"); bottom row, 14-segment
9 mm (0.35"); 8-digit rate, 8-digit total
(resettable)
Units: User configured—feet,
gallons, ft
mil ft
oil barrels (42 gallon), liquor barrels
(32.5 gallons), lb, kg
Rate:
Interval—second, minute, hour, day

Totalizer exponent: E
Response Time:

User selectable, 1 to 60 seconds
Outputs: 4 to 20 mA, 800 Ω max;
internal or external power supply;
12-bit resolution; optically isolated
Dual Relay: Independently configured;
form “C”, 200 Vac @ 0.5 A resistive; rate
alarm, totalizer pulse, error

3

, mil-gal, meters, liters,

3

, m3, mil-liters, acre-feet,

-2

to E

+6

Rate Pulse: 2 output types— 500 mVac
or open collector; 2500 Hz max; 12-bit
resolution; 500 mV AC into 2 kΩ min;
open collector 1 A at 100 V max
Multiple Meters: Synchronization provi­sion included—used for multiple meter/
single pipe system; up to
4 meters may be interconnected to
30 m (100') apart

Keypad: 4 pushbutton keys
Operating Temperature: General

purpose, 40 to 85°C (40 to 185°F)

TRANSDUCERS

Type: Compression-mode

ultrasonic, 625 kHz

Housing Material:
Standard Clamp-On: NEMA 6P

(IP68), -40 to 100°C (-40 to 210°F),
CPVC, Ultem
jacket), aluminum (small pipe)
High-Temp Clamp-On:
NEMA 4 (IP65), -40 to 200°C
(-40 to 400°F), Vespel
aluminum, nickel-plated brass,
PFA (cable jacket)

Wall Mount

®

, nylon, PVC (cable

®

, anodized

Doppler Probe: NEMA 6 (IP67)

-40 to 100°C (-40 to 210°F); 700 psi
(48 bar) max, 316 SS, Ultem

®

, FKM,

nylon, PVC (cable jacket)

Optional Flexible Armored Conduit:
Zinc-plated steel, PVC
Cable Length:

Standard Lengths:
6 m (20') standard

Power
connection

146.1
(5.75)

Transducer
connection

®

177.8
(7)

Input/
output

106.4 (4.19)

98.5 (3.88)

(3) 1/2”
conduit holes

FD-400C-STD

Coaxial cables

FD-400C-STD-HT FD-400C-SML-HT

Coaxial cables

Dimensions: mm (in)

111.3

102.9
(4.05)

48.5

(1.91)

36.8

(1.45)

Dimensions: mm (in)

43.2

(1.70)

35

(1.38)

E-X

FD-400C-SML

Coaxial cable

111.3
(4.38)

Dimensions: mm (in)

48.5

(1.91)

35

(1.38)

Max

Pipe

Dia.

79.2

(3.12)