Turbines PT420 User manual

Model PT420
Frequency Converter
PO Box 933, 15935 US Hwy 303 N.
Altus, OK 73522-0933
1-800-809-1387
Seneca: 864-882-4544
http://turbinesincorporated.com
Copyright 2013-2017 Turbines Inc. All rights reserved.
Information contained herein is subject to change at any time without prior notice.

Notice
Proprietary Notice
The information contained in this publication is derived in part from proprietary data and trade secrets.
This information has been prepared for the expressed purpose of assisting operating and maintenance
personnel in the efficient use of the instrument described herein. Publication of this information does not
convey any rights to use or reproduce it or to use for any purpose other than in connection with the
installation, operation, and maintenance of the equipment described herein.
Copyright 2015
Printed in USA. All Rights Reserved.
SAFETY INSTRUCTIONS
The following instructions must be observed.
Every effort has been made to design and manufacture this instrument to be safe for its intended use.
A hazardous situation may occur if this instrument is not used for its intended purpose or is used
incorrectly. Please note operating instructions provided in this manual.
The instrument must be installed, operated, and maintained by personnel who have been properly
trained. Personnel must read and understand this manual prior to installation and/or operation of the
instrument.
The manufacturer assumes no liability for damage caused by incorrect use of the instrument or for
modifications or changes made to the instrument.
The safety of any system incorporating the equipment is the responsibility of the assembler of the
system.
Les instructions suivantes doivent être respectées.
Tous les efforts ont été faits pour concevoir et fabriquer cet instrument est sans danger pour son
utilisation prévue. Une situation dangereuse peut se produire si cet instrument n'est pas utilisé
conformément à sa destination ou est mal utilisé. S'il vous plaît respecter les instructions fournies
dans ce manuel.
L'appareil doit être installé, utilisé et entretenu par du personnel ayant reçu une formation adéquate.
Le personnel doit lire et comprendre ce manuel avant l'installation et / ou le fonctionnement de
l'instrument.
Le fabricant décline toute responsabilité pour les dommages causés par une utilisation incorrecte de
l'instrument ou de modifications ou de changements apportés à l'instrument.
La sécurité de tout système intégrant l'équipement est de la responsabilité de l'assembleur du
système.
Technical Improvements
Turbines Incorporated may modify the technical data herein without notice.

Turbines Incorporated
PT420 User Manual
PT420 User manual.docx
Table of Contents
Description ....................................................................................................................................................1
Features ...............................................................................................................................................1
Specifications................................................................................................................................................2
Dimensional ..................................................................................................................................................5
Wiring............................................................................................................................................................6
Wiring Guidelines......................................................................................................................................6
Maintenance and Service .........................................................................................................................6
Enclosure..................................................................................................................................................6
Connections..............................................................................................................................................6
Wiring examples .......................................................................................................................................8
Operation Overview ....................................................................................................................................13
Flow Calculations....................................................................................................................................13
Linearization............................................................................................................................................14
Units of Measure.....................................................................................................................................14
4-20mA Current Loop .............................................................................................................................14
Voltage Output........................................................................................................................................16
Pulse Output...........................................................................................................................................18
Reset.......................................................................................................................................................21
Power......................................................................................................................................................21
PT420 Configuration and Operation.......................................................................................................22

Turbines Incorporated
PT420 User Manual
PT420 User manual.docx
1
Description
The PT420 Frequency Converter is a microcontroller based rate/totalizer designed for both, Liquid and
Gas Applications. The unit has PC programming and monitoring capability through a RS-232/USB type
data link and it also offers the option to set the minimum and maximum flow rate thresholds through two
on board pairs of switches and LED indicators. The two selectable PT420 inputs accept sine and square
wave signals generated by passive and, respectively, active magnetic pickup coil probes. Computations
include calculation of liquid flowrate in Pulses per Second based on the turbine pulse rate and in Gallons
per Minute based on the predetermined turbine k-factor. An internal 20 point linearizer allows linearization
of typically non-linear turbines-flowrate curve and extends the range of repeatable points outside the
normal linear range. Outputs include 4-20mA Current Loop, Factored Pulse Output, Voltage Output and
RS-232 data link. Allow
Features
-2-20 point linearizer
-4-20mA Current Loop or DC external powered operation
-Pulse input supports sine and square type signals from pickup coils probes
-All features/configuration settings are field programmable through a hyperlink terminal window
implemented on a RS-232 connected PC or laptop
-Field programmable Minimum and maximum flowrate via two on board switches
-Flowrate monitoring and pulse totalizer through a hyperlink terminal window implemented on a
RS-232 connected laptop
-Concurrent multiple outputs include 4-20mA Current Loop, Factored Pulse and 0-5/10V Voltage
-Built-in test system for testing the functionality of the two on board LED’s
-Error reporting and warning system
-Non-resettable “Grand” totalizer

Turbines Incorporated
PT420 User Manual
PT420 User manual.docx
2
Specifications
Programming and Monitoring Options via PC Displayed Hyperlink Terminal Window
Flowrate Monitoring
6 digit when expressed in Pulses per Second
Decimal locations: 0.01 to 9999.99
6 digit when expressed in Gallons per Minute
Decimal locations: 0.01 to 9999.99
Accuracy: ±0.1% of reading value
Pulses and Gallons Totalizer
11 digit for pulse counting
Decimal locations: 0 to 99,999,999,999
Accuracy: ± 1 pulse
11 digit for gallons counting
Decimal locations: 0.001 to 9,999,999,999.9
Accuracy: ± 0.001Gallon to ±1Gallon, K factor dependent
Manual Programming Options
Field selectable of minimum and maximum flowrate via two on board switches
Programming error indicated by on board LEDs
Power Supply
4-20mA Loop powered
Maximum supply voltage: 36V
Operational supply voltage: 6.5V to 30 VDC
Maximum Current: 25mA
Reverse polarity protected
DC powered
Maximum supply voltage: 36 VDC
Operational supply voltage: 5.5V to 30 VDC (7V to 30V for 0/5V Voltage output option and
12V to 30V for 0/10V Voltage output option)
Maximum supply current: 3.9mA (Pulse output ON and no external loads attached)
Reverse polarity protected
K-Factor range
Pulses per Gallon: 0.00001 to 999,999
Signal Input (sine and square wave)
Frequency: 1Hz-10kHz
Impedance: 10k ohms
Sensitivity(Sine): 10mVpp-28Vpp
Sensitivity(Square): 3.6-28V (50% duty cycle)

Turbines Incorporated
PT420 User Manual
PT420 User manual.docx
3
Engineering Unit Conversions
Pre-programmed units: Gallons
Compensation
Linearizer table 2 to 20 points
Time Base
Rates can be displayed per second or minute
Outputs
Factored Pulse (based on input pulses or calculated Gallons)
Input frequency range: 1Hz to 10KHz
Pulse Output Divider: 0.01, 0.1, 1, 10, 100, 1000, & custom
Pulses width variable or fixed: 2, 5, 10, 50, 100, 250, 500ms, & custom
Accuracy: ±1 pulse
Pulses acquiring interval: 1 sec
Output update interval: 1 sec
Pulse shape: square wave, 50% duty cycle
Pulse amplitude: 5 to 30V, proportional to supply voltage
Minimum load resistance: 1KΩ
Short circuit protection and recovery
Factored Rate current (based on input pulses or calculated Gallons)
Input frequency range: 5Hz to 6KHz
Current range: 4 to 20mA
Accuracy: 0.1% of reading at 25°C , 0.25% over temperature
Response time: 0.2 sec min (at 5Hz input frequency)
Scalable low and high programmable
Current Loop error detect and shut down
Factored Rate voltage (based on input pulses or calculated Gallons)
Input frequency range: 5Hz to 6KHz
Voltage range: 0 to 5V or 0 to 10V
Accuracy: 0.25% of FSR at 25 °C, 0.5% over temperature
Accuracy (special order): 0.1% of FSR at 25 °C, 0.25% of FSR over temperature
Response time: 0.2 sec min (at 5Hz input frequency)
Minimum load resistance: 10KΩ
Scalable low and high programmable
Short circuit protection and recovery
DC Output Voltage
Maximum output voltage: 35V
Operational output voltage: 5V to 30V, proportional to supply voltage
Max Current: 20mA
Short circuit protection

Turbines Incorporated
PT420 User Manual
PT420 User manual.docx
4
Compliance
Pollution Degree: 2
Overvoltage Category: I
Altitude: 2000 m max
Environmental
Operating: -40 to 65°C (-40 to 150°F)
Storage: -40 to 85°C (-40 to 185°F)
Enclosure
Cast Aluminum (copper-free)
Epoxy Powder Coat
Enclosure rating NEMA 3, 4, 4X
Class I, Division 1 and 2, Groups B, C, D
Class II, Division 1 and 2, Groups E, F, G
Class 1, Zone 1 and 2, IIA, IIB
Other features
EEPROM parameter storage
Programming and monitoring via a PC displayed Hyperlink Terminal Window
Field programmable Minimum and Maximum flowrate via two on board switches
Secondary storage location for parameters and linearizer table

Turbines Incorporated
PT420 User Manual
PT420 User manual.docx
5
Dimensional

Turbines Incorporated
PT420 User Manual
PT420 User manual.docx
6
Wiring
All of the PT420 connections with the external devices are made through two removable connectors. To
access the connectors, remove the face cover of the unit and observe connectors TB1 and TB2 on the
PT420 circuit board. The wiring for monitoring and programming PT420 is made through J1 connector,
placed on the same circuit board.
Wiring Guidelines
Turbines Incorporated recommends the following practices be followed:
All wires connected to the unit should be shielded
To help avoid ground loops and unexpected behavior, it is recommended that the opposite end of
any cable shield is left unconnected (the end opposite the PT420)
Care should be taken to ensure no part of any wire is not fully inserted into a connector to avoid
shorting other circuitry on the mounting board
Shields should not cover more than one set of signal wires at a time
Supply wires should be 30AWG minim
Maintenance and Service
The only user serviceable parts of the PT420 are TB1, TB2 and J1 connectors. When servicing or
programming the PT420, take care when opening the cover of the unit that any internal signal or power
wires are not strained or pulled.
Enclosure
In order to maintain enclosure ratings the following torque specs must be followed:
Item
Torque
1” NPT fitting
2.5 turns past hand tight
Enclosure Cover
1/8-1/4 turn past hand tight
Connections
The connections are listed on the rear of the PT420 board. For clarification, the connections are shown
below for each one of the three PT420 connectors (see Figure 1).
TB1
1
SINE +/PULSE +
2
SINE –
3
+ Vcc_OUT
4
GRND/SHIELD
Where:
SINE + and SINE –represent the differential input from a passive magnetic pickup coil
PULSE + is the single input from an active magnetic pickup coil
+Vcc_OUT is the optional voltage output for supplying an active magnetic pickup coil

Turbines Incorporated
PT420 User Manual
PT420 User manual.docx
7
TB2
1
LOOP +/+Vcc_INPUT
2
LOOP –
3
VOUT
4
POUT
5
GND/SHIELD
Where:
LOOP + and LOOP –are the inputs for 4-20mA current loop
+ Vcc_INPUT is the single input for external DC supply
VOUT is the factored voltage output
POUT is the factored pulse output
Where:
RS232_CTS and RS232_RTS are RS232 control signals
RS232_TXD and RS232_RXD are RS232 data signals
+ 5V_RS232 is the 5Vcc voltage input from RS232/USB cable
Figure 1. PT420 Connection Diagram
J1
1
GND
2
RS232_CTS
3
+5V_RS232
4
RS232_TXD
5
RS232_RXD
6
RS232_RTS