Badger-783

Models
PFT-1E & PFT-4E

Electronic Scalable Transmitters

Technical
Brief

GENERAL
The models PFT-1E and PFT-4E are electronic scalable pulse
transmitters with AC/DC inputs and outputs.Themodel PFT-1E
combines with the disc and OP meter lines while the model
PFT-4E is used with the Industrial turbo meter line.
These electronic transmitters can be scaled to almost any
pulse rate,allowing recalibration by resetting the scale factor with four rotary switches. The PFT-1E transmitter can
be calibrated for use with different size meters simply by
re-setting the rotary switches.OPERATION
The flow of fluid through any of the meters results in movement
of the meter measuring element which rotates an internal
four pole magnet. The poles of the magnet are sensed by
amagnetoresistive pickup which produces four pulses for
each revolution of the magnet. These signals are sent to the
electronic board where they are conditioned and scaled to the
desired unit of flow,e.g., 1 pulse per ounce, per gallon, etc.
The meter factor, which is the number of revolutions of the
measuring element per unit of measure, rarely coincides with
the desired applicationrequirements and has to be modified
or scaled to standard engineering units. This scaled pulse
is then sent to secondary equipment such as a controller or
remote totalizer in the form of a switched ACvoltage or a DC
current sinking pulse (open collector NPN transistor).

PFT-1E TRANSMITTER

FEATURES

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Solid-state circuitry for long life

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Fast calibration with (4) rotary switches -change
gears are eliminated
LED indicator for visual pulse detection
Optically isolated outputs prevent false counts
due to line noise

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Field retrofit available

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Rugged, highimpact resistant housing

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Corrosion proof protection

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Water tight - NEMA 4X Rating

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®

Sensor will withstand fluid temperatures to 250° F

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BadgerMeter,Inc.

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