Flomec 490, Instruction Manual

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3 Introduction
1.2 Overview
The Insertion Meter provides a cost effective and simple means of measuring the flow of a
wide range of low viscosity liquids. Installation is quick and inexpensive for pipe diameters
ranging from 40mm to 900mm (1.5-36") and up to 2500mm (100") nominal bore for the Hot
tap capable model DP525.
The Insertion Meter has a linear measuring range of 0.3~10.0 metres/sec. (1~33 ft/sec.).
Minimum detectable flow velocity is 0.15 m/sec. (0.5 ft/sec.). When used in conjunction with
the RT12 flow rate totaliser NLC feature the linear flow range is extended down to 0.15
m/sec. (0.5 ft/sec.) with an improved linearity.
The Insertion Meter is constructed from 316 L (1.4404) stainless steel enabling use in many
applications for metering water and low viscosity chemicals.
Two independent pulse outputs are standard & can directly input to a wide range of ancillary
instruments, PLC’s and computers. Both pulse outputs have a high level of immunity to
electrical interference. Options include a reed switch.
1.3 Operating principle
Flow passes through a pipe causing the rotor to spin. Magnets installed in the rotor pass by
pulse sensors within the transducer body & inturn this produces frequency outputs
proportional to flow rate.
1.4 Specifications
( subject to change without notice )
Model 490 525
Suits pipe sizes 40mm - 900mm 50mm - 2500mm
( 1.5
– 36 inches ) ( 2 – 100 inches )
Flow range 0.25 - 6300 litres/sec. 0.4 - 49000 litres/sec.
( 4-99600 USGPM ) ( 6-780000 USGPM )
Process connections
1.5" or 2” NPT or BSPT 2" NPT or BSPT
Velocity range 0.3 - 10 metres/sec. ( 1 - 33 feet/sec.)
Linearity
typically

1.5% O.R. (1-10m/s)

1.5% F.S. (0.3-1m/s)
Repeatability
typically

0.5%
Pressure (max) 80 Bar ( 1200PSI )
Temperature range
-40

C to 100

C (-40

F to 212

F ) standard
Other temperature ranges available
Body material 316L stainless steel (1.4404)
Rotor materials Carbon Fibre filled PVDF (standard)
or optional PEEK rotor with PEEK-HPV bearing
O-Ring material VITON - options available
ELECTRICAL
(a) Square wave ( Hall Effect )
5-24vdc, 3wire NPN open collector (20mA max. current sink)
(b) Reed Switch (to 100°C) 30vdc max. x 20mA max. (output freq. is 1/3 std. K-factor)
Output freq. @ max. velocity ( a ) outputs 220~240 Hz ( b ) output 73~80 Hz
Transmission distance 1000 metres ( 3300 feet ) maximum
Wiring (standard) 5 core, screened cable
length 1.5m/5ft (DP490) or 1m/3ft (DP525)
Protection class IP68 submersible ( Nema 6X )
Conduit entry (terminal box) M20 x 1.5
Shipping Weight 1.2 kg ( 2.7 lbs.) 1.5 kg ( 3.3 lbs.)