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DESCRIPTION

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ONICON Incorporated’s F-3500 series insertion electromagnetic flow meters are suitable for measuring electrically conductive liquids in a wide variety of applications. Each F-3500 provides a single analog output for flow rate, a high resolution frequency output to drive peripheral devices, a scalable pulse output for totalization, and an empty pipe alarm signal.

Two versions of the F-3500 are now available. The standard configuration F-3500 is suitable for pipe sizes ranging from 3” to 72” in diameter. The small pipe configuration F-3500 is suitable for pipes ranging in size from 1¼” to 2½” in diameter. Optional remote displays and BTU measurement systems are also available for both versions.

APPLICATIONS

• Accurate, reliable flow measurement for HVAC applications
• Ideal for monitoring open loop condenser water flow
• Hot tap design simplifies domestic water retrofit installations
• Cost-effective way to monitor flow in larger pipe sizes
• Suitable for use in water and water/glycol systems

CALIBRATION

Every ONICON flow meter is wet calibrated in a flow laboratory against standards that are directly traceable to NIST*. A certificate of calibration accompanies every meter

FEATURES

Simple Installation and Commissioning – 
Factory programmed and ready for use upon delivery. 
Exceptional Performance & Value – 
Cost-effective insertion style design provides accuracy and reliability normally only found in more expensive full bore devices.
Excellent Long Term Reliability – 
Low maintenance, no-moving-parts flow sensing technology works well in difficult flow measurement applications such as open loop condenser water flow.
Highly Accurate Over a Wide Flow Range –
Highly efficient sensor design and continuous auto-zero function improve accuracy and
sensitivity, particularly at low flow rates.
Simplified Hot Tap Insertion Design – 
Standard on every insertion flow meter, this feature allows for insertion and removal by hand
without a system shutdown.
Ideal Solution for Retrofits –
The innovative hot tap adapter design allows for wet tapping pipes without interrupting flow.


F-3500

GENERAL SPECIFICATIONS

ACCURACY
± 1.0% of reading from 2 – 20 ft/s
± 0.02 ft/s below 2 ft/s
FLOW RANGE
0.1 ft/s to 20 ft/s (200:1 turndown)
SENSING METHOD
Electromagnetic sensing (no moving parts)
PIPE SIZE RANGE
Standard Configuration: 3 – 72” nominal diameter
Small Pipe Configuration: 1¼ – 2½” nominal diameter
INPUT POWER
20 – 28 VDC, 250 mA at 24 VDC
20 – 28 VAC, 60 Hz, 6 VA
LIQUID TEMPERATURE RANGE
15° to 250° F
AMBIENT TEMPERATURE RANGE
-20° to 150° F
OPERATING PRESSURE
400 psi maximum
PRESSURE DROP
Standard Configuration: 0.1 psi at 12 ft/s in 3” pipe, decreasing as line size increases
Small Pipe Configuration: 0.33 psi at 8 ft/s in 1.25” pipe, decreasing as the line size increases
OUTPUT SIGNALS PROVIDED
Analog Output (Isolated)
Selectable: 4-20 mA, 0-10 V or 0-5 V
Frequency Output
0-15 V peak pulse, 0-500 Hz
Scalable Pulse Output
Isolated solid state dry contact
Contact rating: 50 VDC, 100 mA maximum
Pulse Duration: 0.5, 1, 2 or 6 seconds
MATERIAL
Wetted metal components: 316 Stainless Steel
Sensor head: XAREC
Optional: NSF/ANSI 61/372 version
ELECTRONICS ENCLOSURE
Weathertight NEMA 4 aluminum enclosure
ELECTRICAL CONNECTIONS
10’ of PVC jacketed cable with ½” NPT conduit connection
Dedicated earth wire required
4-wire minimum for power and analog output
Additional wires required for pulse, frequency and alarm outputs


OPERATING RANGE FOR COMMON PIPE SIZES 0.1 to 20 ft/s
Pipe Size (inches) Flow Rate (GPM)
1 ½ 0.6 – 130
2 1.0 – 200
2 ½ 1.1 – 230
3 2.4 – 460
4 4 – 800
6 9 – 1,800
8 16 – 3,100
10 24 – 4,900
12 35 – 7,050
14 42 – 8,600
16 55 – 11,400
18 70 – 14,600
20 86 – 18,100
24 125 – 26,500
30 223 – 41,900
36 304 – 60,900
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Referensi : https://www.onicon.com/products/f-3500-series-insertion-electromagnetic-flow-meter/