Dwyer EFS2 - Manual (Page 2)

SPEciFicationS*
gEnEral inFormation
tablE oF contEntS
general information
Features, Specifications .......................................................................................................................................Page 1
installation
Distorted Flows, Fitting Installation, Chemical Injection or Fertigation, Meter Installation,
Positioning the Meter ............................................................................................................................................Page 2
Straight Pipe Recommendations .........................................................................................................................Page 3
Full Pipe Recommendations .................................................................................................................................Page 4
Electrical connections
General Electrical Guidelines, Power, Forward Flow Output, Reverse Flow Output,
Grounding Guidelines, Grounding Diagram.........................................................................................................Page 5
connections Diagrams
Counter or PLC, BAT 4-20 mA Output...................................................................................................................Page 6
RTI Display and Proportional Feed, RTI & 4-20 mA Output,
Dual Displays (example of bidirectional connection)..........................................................................................Page 7
operation & maintenance
Zero Adjustment, Minimum Flow, Flow Rate Table, Presence of Flow Indication,
Filtering, Electrode Coating, Calibration (“K-Factor”), K-Factor Chart ...............................................................Page 8
caution & troubleshooting
Problems, Probable Causes, To Try ......................................................................................................................Page 9
Page 1
tablES anD DiagramS
Features .................................................................................................................................................................Page 1
Specifications ........................................................................................................................................................Page 1
Distorted Flows, Positioning the Meter ................................................................................................................Page 2
Straight Pipe Recommendations .........................................................................................................................Page 3
Full Pipe Recommendations .................................................................................................................................Page 4
Grounding Diagram ...............................................................................................................................................Page 5
Counter or PLC, BAT 4 to 20 mA Output...................................................................................................................Page 6
RTI Display and Proportional Feed, RTI & 4 to 20 mA Output,
Dual RTI Displays (example of bidirectional connections) .................................................................................Page 7
Flow Rate Table, K-Factor Chart, Zero Adjustment .............................................................................................Page 8
Troubleshooting .....................................................................................................................................................Page 9
EFS2 Series insertion electromagnetic flowmeters are designed
for use with conductive liquids in 1 to 12” pipe. A choice of
materials (stainless steel, brass, and PVC) allows the meter
to adapt to a range of temperature, pressure, and corrosive
environments.
The EFS2 is highly suitable for difficult applications with changing
viscosities and pulsating flows, such as air-driven diaphragm
pumps. With no moving parts, these meters can be used in
“dirty” applications where debris would foul a mechanical
meter. Like all magmeters, when used in chemical injection
applications, these meters should be installed upstream of the
chemical line (or far enough downstream to allow complete
mixing of fluids before the meter).
Designed for modularity and versatility, the EFS2 Series has
a current-sinking pulse output that can be combined with the
appropriate transmitter or indicator for the application. For analog output and display of rate and total, the Series RTI can
be used, and for a a single analog output is provided by the
Series BAT. The Series PWD can be used to divide the pulse
for pacing chemical metering pumps. Modules can be wall- or
meter- mounted. If the EFS2 meter is used with a programmable
controller, the output signal can be fed direct, with no other
conditioning required.
EFS2 Series fixed depth insertion meters require special
fittings. Factory installation in the fitting ensures correct depth
placement in the pipe. The EFS2 Series meter can be ordered in
a full power model when a source of electricity is available, or in
a low power model with option (-LOP) that can run on an external
battery with solar panel such as th Model SPK. Reverse flow
output option (-RFO) and immersibility option (-IMM) are optional.
FEaturES
PVDF electrode cap
O-ring, EPDM (Fluoroelastomer optional)
Cover, or transmitter or indicator module
Powder coated aluminum housing
Sensor body (Stainless, Brass or PVC)
Hastelloy® electrodes
Cable strain relief
1” to 12”
316 SS/Brass/PVC
Hastelloy®
Cast powder-coated aluminum
PVDF
EPDM standard (Fluoroelastomer optional)
12 to 25 VDC, 250 mA
12 to 25 VDC, 40 mA average with 250 mA peaks
0.28 to 20 ft/sec (0.08 - 6.09 m/sec)
0 to 160˚ F (-17 to 72˚C)
32 to 200˚ F (0 to 93˚C)
32 to 130˚ F (0 to 55˚C) @ 0 psi
200 psi (13.8 bar)
150 psi (10 bar) @ 75˚F
20 microSiemens/cm
+/- 1% of full-scale
Square wave pulse, opto isolated, 550 Hz @ 20 ft/sec
Software, defaults to zero flow
Pipe Size
materials mechanical
Electrodes
Housing
Electrode cap
o-ring
Power Full Power
low Power
Flow rate
temperature ambient temp
Fluid temp : brass/SS
Fluid temp: PVc
Pressure brass/SS
PVc
minimum conductivity
calibration accuracy
output
Empty Pipe Detection
*Specifications subject to change
Hastelloy® is a registered trademark of Haynes International, Inc.