Flo-tech F5141 Operating Manual

K-Factor Scaler F5140

and

Programming Kit F5141

Installation & Operating Instructions

8635 Washington Avenue  Racine, WI 53406 USA

Tel: [phone] or 262-639-6770
Fax: [phone] or 262-639-2267

E-Mail:  [e-mail]

www. o-tech.com

K-Factor Scaler

Installation & Operating Instructions

TABLE OF CONTENTS

Introduction ...................................................................................................................................................................................3

Operating Principle .....................................................................................................................................................................3

Speci cations .................................................................................................................................................................................3

Installation ......................................................................................................................................................................................4

Enclosure Mounting .........................................................................................................................................................4

Power ..........................................................................................................................................................................................4

Turbine Meter .........................................................................................................................................................................4

Pulse Output ...........................................................................................................................................................................4

Start-up and Con guration Using Optional Programming Software Kit F5141 ........................................... 5

Software ................................................................................................................................................................................5

Setting the K-factor .............................................................................................................................................................6

Setting the output pulse width......................................................................................................................................6

Setting the output level to normally high or normally low ............................................................................. 6

Setting the output pulse to use the internal or external pull-up resistor .................................................6

Return Goods Authorization ..................................................................................................................................................7

Waste Electrical and Electronic Equipment (WEEE) Directive ................................................................................ 7

Statement of Warranty .............................................................................................................................................................. 8

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K-Factor Scaler
Installation & Operating Instructions

INTRODUCTION

The Flo-tech K-Factor Scaler is a  eld adjustable frequency divider, which interfaces the output signal from a turbine meter with
a magnetic pick-up to the input of a PLC, RTU, CPU data acquisition card, or similar totalizer device. The adjustable frequency
divisor, referred to as the K-factor, allows the pulses being sent from a turbine meter to be divided into a recognizable unit that
an end device, such as a PLC can count and display.

OPERATING PRINCIPLE

Fluid moving though a turbine  ow meter causes the rotor to rotate in relation to the  ow rate. The rotation of the rotor blades
cuts through the magnetic  eld generated by the magnetic pick-up which in turn generates a frequency output signal that is
directly proportional to the speed of the rotor.

The signal produced is received by the K-Factor Scaler input ampli er, which has an input sensitivity of 30 mV p-p to 30 V p-p.
The signal is then sent to an onboard microcontroller, which acts as a divisor with a range of 1 to 999,999,999. The divisor
(K-factor) is user adjustable through the optional programming software kit. The microcontroller handles the dividing process
by counting the input pulses and comparing it to the programmed K-factor value. Once the count equals this value, an output
pulse occurs for a selectable time period and the counting process starts over.

In addition, if the K-factor is set to 1, the K-Factor Scaler can be used as a pre-ampli er where the frequency from a low-level
turbine meter is proportional to the logic level frequency output needed by a PLC or CPU data acquisition card. This option
allows the end device to control the dividing process of the turbine meter output to a recognizable  ow rate.

SPECIFICATIONS

External Power:

Input Voltage; 8.5 to 30 Vdc (Diode protected)
Maximum Current draw; 18 mA (using internal resistor @ 30 Vdc input)

Environmental:

Operating Temperature; -22 ˚F (-30 ˚C) to +158 ˚F (+70 ˚C)

Inputs:

Magnetic Pick-up Input
Frequency Range; 0 to 4000 Hz
Trigger Sensitivity; 30 mV p-p to 30 V p-p

Output Signal:

Max. Voltage; 30 Vdc

Max Power; 0.25 W

Pulse Type (using internal pull-up resistor);

VH = Power Input Voltage – 0.7 Vdc
VL = Less then 0.4 V @ max input power
Pulse Type (using external pull-up resistor);
VH = Input Voltage to external pull-up resistor
VL = [VH /(selected resistor value + 47)] × 47

Pulse Length; 150μs, 1ms, 25ms, 100ms, 500ms, 1s, or Auto mode selectable.

Output Options:

Jumper Con gurations

Internal Pull-up; 3.6K Ω to device power
External Pull-up; Open collector

Enclosure:

ABS with mounting  anges

Form #FLIT 555 11/10 Page 3