AW Gear Meters MAG-EX User Manual

MAG-EX Hall Effect Pickup

Installation and Technical Data Guide

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

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

Rev 08/12

Description:

The MAG-J is a Hall Effect sensor which is compatible with all AW and KEM Positive Displacement gear flow
meters except ZHM-04 to the ZHM-07KL. 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%.

MAG-J 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 MAG-J sensor has two different output configurations: MAG-J-PA for a sinking output and MAG-J-PB for a
sourcing output.

Installation:

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

• Swivel fitting is required for sensor mounting

• 4 Steps to properly install sensor:
1- Securely fasten swivel fitting on flow meter
2- Turn set screws counter clockwise until they are not visible inside the swivel fitting
3- Install sensor into swivel fitting until sensor bottoms out in the sensor hole
4- Tighten set screws by turning clockwise

NOTE: DO NOT OVER TIGHTEN SET SCREWS OR SENSOR DAMAGE WILL OCCUR!

NOTE: WIRING SHOULD BE INSTALLED BY A QUALIFIED INSTRUMENTATION TECHNICIAN

MAG-J-PA MAG-J-PB Wire Color

Output Output White

Ground Ground Black

Supply Supply Red

AW Gear Meters wiring color code:

Part number configuration:

MAG-J sensors can be used with all AW and KEM
Positive Displacment great flow meters except
ZHM-04 to the ZHM-07KL

MAG-J-PA for a sinking output
MAG-J-PB for a sourcing output

Note: In order to recieve correct swivel fitting with your sensor - you
must specify meter part number when ordering

MAG-EX Hall Effect Pickup

Installation and Technical Data Guide

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

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

Rev 08/12

MAG-J-PA Sinking Output Circuit

~40 Ohm

SUPPLY

OUTPUT

GROUND

Analog
Switch

MAG-J-PB 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 Data: