AW Gear Meters HEF User Manual

HEF Hall Effect Pickup

Installation and Technical Data Guide

AW Flow Meters - Franksville, WI Phone: [phone] Fax: [phone]

Email: [e-mail] www.awflowmeters.com

Rev 06/06

Description:

The HEF is a Hall Effect sensor which is compatible with the Aluminum, 303 Stainless Steel and 316 Stainless
Steel body JV-CG and JV-KG series of flow meters. The sensor detects the rotation of the flow meter’s gears
and emits a frequency signal proportional to flow. The output signal is a square wave pulse which has a duty
cycle of approximately 50%.

HEF signal outputs are protected with a self-resetting fuse. This fuse has a 50mA nominal trip point. When a
trip occurs, turn off power to the sensor and remove output load to reset fuse.

The HEF sensor has two different output configurations: HEF-A or HEF-AA for a sinking output and HEF-B or
HEF-BB for sourcing output.

Installation:

• Ensure that the flowmeter sensor cavity is free of debris prior to installing pickup

• Make sure the sensor mounting screws line up with the mounting holes. If they do not, remove and rotate
the sensor 180°

NOTE: WIRING SHOULD BE INSTALLED BY A QUALIFIED INSTRUMENTATION TECHNICIAN

Pin Number Wire Color
Supply Voltage: 6 Red
Ground: 5 Black
Signal: 4 White

AW wiring color code:

Pin Number HEF-A / -AA HEF-B / -BB

1 NC NC

2 NC NC

3 NC NC

4 Output Output

5 Ground Ground

6 Supply Supply

Electrical Connection for Pin Connector

1 3 5

6

1.19"

HEF-X: (2.12")

HEF-XX: (2.39")

Part number configuration:

HEF sensors can be used wih all Aluminum, 303 Stainless
Steel and 316 Stainless Steel body flow meters

JV-CG 01, 10, 15, 20 & 30
JV-KG 12, 20 & 30

JV-60CG & JV-60KG ONLY

Pinout looking at male connector on sensor

HEF-A, HEF-B

HEF-AA, HEF-BB

HEF Hall Effect Pickup

Installation and Technical Data Guide

AW Flow Meters - Franksville, WI Phone: [phone] Fax: [phone]

Email: [e-mail] www.awflowmeters.com

Rev 06/06

HEF-A / -AA Sinking Output Circuit

~40 Ohm

SUPPLY

OUTPUT

GROUND

Analog
Switch

HEF-B / -BB Sourcing Output Circuit

~40 Ohm

SUPPLY

OUTPUT

GROUND

Analog
Switch

• User may need to add external components to interface to displays
or other instruments

• User must limit output voltage to Supply -1V

• Max current sinking capability: 50mA

• Signal output square wave :

V

high

= Supply -1V @ no output load

V

low

= 0.1V

• Max sourced output voltage: Supply -0.5V

• Max current sourcing capabilities: 50mA

Supply Voltage: +10 to 28 Volt DC

Supply Current: 8 mA @ 12 VDC, 12mA @ 24 VDC

Duty Signal: 50% ± 15%

Minimum Signal: 0.5 Hz

Frequency Output: Flow dependent, up to 2,000 Hz

Driving Capacity: 50 mA Max resistive load

Output Impedance: ~ 40 Ohm - analog switch and self-resetting fuse

Temperature Range: -40° F to 185° F (-40° C to 85° C)

Technical Dat

a: