Model: HIT-1B USER`S MANUAL
Contents
1. 3 3 Theory of Operation 5 3 1 Functional Blocks 5 3 1 1 Preamplifier 5 3 1 2 Microcontroller 3 1 3 Loop Driver 6 3 1 4 Communications Interface 6 3 2 System Response Time 6 4 1 7 4 1 Configuration Commands 8 42 Monitoring Diagnostic Commands 10 4 3 Default Configuration 11 5 Installation 13 5 1 Typical Connections 13 5 2 Communications Connections 16 5 3 Wiring 16 297 This page intentionally left blank HP 297 Introduction 1 1 INTRODUCTION The HIT 1 Hoffer Intelligent Transmitter is a loop powered intelligent flow rate transmitter The transmitter is compatible with all2. OPTION GENERAL PURPOSE 2 6 L X 2 6 H X 2 6 W MINIMUM MOUNTING SPACE D 2 LONG DIN RAIL MOUNT SINGLE UNIT UP TO 20 HIT 1B UNITS CAN BE MOUNTED ON A SINGLE RAIL ADD 2 PER UNIT 3 0 MEETS CLASS 1 DIV 1 AND 2 GROUPS C D CLASS II GROUPS E F G NEMA 4X WITH RING CERTIFIED CSA UL BODY KILARK GECCT 3 STOCK 200 0945 FLAT COVER STOCK 200 0533 KILARK GECBC 3B O MEETS CLASS L DIV 1 AND 2 GROUPS A B C D CLASS 1 ZONES 1 AND 2 GROUPS IIB H2 CLASS DIV 1 AND 2 GROUPS E F G CLASS NEMA 3 4 7 B C D 9 E F G CERTIFIED CENELEC CSA UL FM BODY KILARK HKB STOCK 200 0406 FLAT COVER STOCK 200 0773 KILARK HKB B MEETS CLASS L DIV 1 AND 2 GROUPS A B C D CLASS 1 ZONES 1 AND 2 GROUPS IIB H2 CLASS DIV 1 AND 2 GROUPS E F G CLASS NEMA 3 4 7 B C D 9 E F G CERTIFIED ATEX CENELEC CSA UL FM BODY COVER STOCK 200 2006 LINEARIZED ANALOG OUTPUT MODEL 1 8 OPTION 7 4 20 UP 20 POINTS ACCURACY 0 02 OF FULL SCALE INPUT POWER MODEL 1 C OPTION D 8 TO 24 VDC LOOP POWERED AC 115 220 VAC 50 60 HZ EXTERNAL POWER USE MODEL ACC39B SPECIAL FEATURES MODEL D OPTION CE CE MARK REQUIRED FOR EUROPE SP ANY SPECIAL FEATURES THAT ARE NOT COVERED IN THE MODEL NUMBER USE A WRITTEN DESCRIPTION OF THE SP HP 297 Specification
3. Flow Calculation Method Sets the flow rate calculation method to Average K Factor or Linearization Table Frequency vs K Factor Table Set to 0 for Average or 1 for Linearization Average K Factor Set to the average K factor from the meter calibration data This value is used in the flow rate calculation when the FC command is set to Average Number of Points Number of Frequency K factor pairs in the Linearization table Maximum 20 Frequencies 01 20 Frequency values for the Linearization table Maximum 20 Minimum number specified by NP command K Factors 01 20 K factor values for the Linearization table Maximum 20 Minimum number specified by NP command Configuration 9 The following table lists the various configuration commands both read and write available for the HIT 1 transmitter along with the response from the HIT 1 for each command Description Read Write Response Command Command Tag Number DN lt CR gt DN lt value gt lt CR gt TAG NUM value 20mA Maximum AF lt CR gt AF lt value gt lt CR gt 20 mA Flow value Flowrate Max Sample Time lt gt NB lt value gt lt CR gt MAX M TIME value Correction Factor CF lt CR gt CF lt value gt lt CR gt CORR FACT value Flowrate Units lt gt FM lt value gt lt CR gt FLOW UNITS where value is 0 1 value Where value is 2 or 3 SEC MIN HR or DA
4. 00 F08 500 00 F09 600 00 F10 700 00 F11 800 00 F12 900 00 F13 1000 0 F14 1100 0 F15 1200 0 F16 1300 0 F17 1400 0 F18 1500 0 F19 1600 0 F20 1700 0 01 100 00 K02 100 00 100 00 K04 100 00 K05 100 00 K06 100 00 K07 100 00 K08 100 00 HP 297 12 Configuration HP 297 FIELD Value KO09 100 00 K10 100 00 100 00 K12 100 00 K13 100 00 K14 100 00 K15 100 00 K16 100 00 17 100 00 18 100 00 19 100 00 K20 100 00 Installation 13 5 INSTALLATION The HIT 1B has an input conditioning circuit which accepts signals from most frequency or pulse producing flowmeters The input will interface directly to Turbine Flowmeters Reed Switches Logic Signals Open Collector Outputs The input is protected for over voltage up to 50 volts The signal conditioning circuit is configured for the selected signal type by appropriately setting the input selection DIP switches found on the HIT 1B signal input board see following for switch settings When interfacing with a MAG coil or dry contact reed switch signal the preamp input sensitivity is adjustable by setting the DIP switches S1 3 and S1 4 according to the following table 22 off off 40mV p p on off 100mV p p off on 160mV p p on on The transmitters are shipped from the factory with the sensitivity set to the maximum setting 22mV p unless otherwise noted 5 1 Typical Conne
5. Hoffer turbine flowmeters and the H O G series positive displacement flowmeters The transmitter can accept a low level frequency signal a pulse signal or a contact closure on the input and provides a linearized 4 20 mA current output which is proportional to the flow rate The HIT 1 is fully configurable with K factors frequencies and timebase being configured via the RS232 communications port The configuration and monitoring can be performed using any PC based communications program e g HyperTerminal or ASCII terminal The transmitter is housed in an aluminum enclosure and can be mounted directly on a flowmeter or wall mounted using an optional NEMA 4X or EX enclosure An optional DIN rail mounting bracket is also available for mounting on a standard DIN rail This transmitter is designed to conform to the EMC Directive of the Council of European Communities 89 336 EEC and the following standards Generic Emission Standard EN 50081 1 Residential Commercial amp Light Industry Environment Generic Emission Standard EN 5008 1 2 Industrial Environment Generic Immunity Standard EN 50082 1 Residential Commercial amp Light Industry Environment Generic Immunity Standard EN 50082 2 Industrial Environment HP 297 2 Introduction 11 Model Number Designation MODEL HIT 1B B 0 ENCLOSURE STYLE LINEARIZED ANALOG OUTPUT INPUT POWER SPECIAL FEATURES ENCLOSURE STYLE MODEL HIT 1B
6. ERTY AND INJURY TO OR DEATH OF ANY PERSONS HFC NEITHER ASSUMES NOR AUTHORIZES ANY PERSON TO ASSUME FOR IT ANY OTHER LIABILITY IN CONNECTION WITH THE SALE OR USE OF HFC S GOODS AND THERE ARE NO ORAL AGREEMENTS OR WARRANTIES COLLATERAL TO OR AFFECTING THE AGREEMENT PURCHASER S SOLE AND EXCLUSIVE REMEDY IS THE REPAIR AND OR REPLACEMENT OF NONCONFORMING GOODS AS PROVIDED IN THE PRECEDING PARAGRAPHS SHALL BE LIABLE FOR ANY OTHER DAMAGES WHATSOEVER INCLUDING INDIRECT INCIDENTAL OR CONSEQUENTIAL DAMAGES HFC 9907 A LIMITED WARRANTY POLICY FOR HOFFER FLOW CONTROLS HOFFER FLOW CONTROLS INC HFC warrants HFC s Precision Series and API Series of turbine flowmeters to be free from defects in material and workmanship under normal use and service only if such goods have been properly selected for the service intended properly installed and properly operated and maintained as described in the turbine flowmeter manual Reference turbine flowmeter manual for specific details This warranty shall extend for a period of five 5 years from the date of shipment to the original purchaser and covers the Precision Series and API Series of flowmeters supplied with their standard hybrid ceramic ball bearings only All other HFC products carry a one 1 year warranty This warranty is extended only to the original purchaser Purchaser Purchaser s sole and exclusive remedy is the repair and or replacement of nonconforming goods as pro
7. Hoffer Intelligent Transmitter Model HIT 1B USER S MANUAL HP 297 October 2005 HOFFER FLOW CONTROLS INC The Turbine Flowmeter Company 107 Kitty Hawk Lane P O Box 2145 Elizabeth City NC 27906 2145 800 628 4584 252 331 1997 FAX 252 331 2886 www hofferflow com E mail info hofferflow com NOTICE Hoffer Flow Controls Inc makes no warranty of any kind with regard to this material including but not limited to the implied warranties of merchantability and fitness for a particular purpose This manual has been provided as an aid in installing connecting calibrating operating and servicing this unit Every precaution for accuracy has been taken in the preparation of this manual however Hoffer Flow Controls Inc neither assumes responsibility for any omissions or errors that may appear nor assumes liability for any damages that result from the use of the products in accordance with information contained in the manual HOFFER FLOW CONTROLS policy is to provide a user manual for each item supplied Therefore all applicable user manuals should be examined before attempting to install or otherwise connect a number of related subsystems During installation care must be taken to select the correct interconnecting wiring drawing The choice of an incorrect connection drawing may result in damage to the system and or one of the components Please review the complete model number of each item to be connected and locate th
8. Y Flow Calculation FC lt CR gt FC lt value gt lt CR gt Method where value value 1 Where value is AVG or LIN Average K Factor AK lt CR gt AK lt value gt lt CR gt _ AVG KFAC value Number of Points in NP lt CR gt NP lt value gt lt CR gt NUM PTS value Frequency vs K Factor table Frequency 1 20 F lt CR gt Fi lt value gt lt CR gt _ FREQ value K Factor 1 20 K lt CR gt K lt value gt lt CR gt K FACT value For example To set the maximum flow rate for the 20mA output to 821 gal min Send from the terminal AF 821 lt CR gt responds 20 mA Flow 821 Send from the terminal FM 1 lt CR gt responds FLOW UNITS MIN HP 297 10 Configuration 4 2 Command Monitoring Diagnostic Commands DA OM OI OF MO AA Description Dump All Sends all the configuration settings to the attached terminal Output Maximum Sets the output current to 20mA After one minute resets to the calculated output current Output Minimum Sets the output current to 4mA After one minute resets to the calculated output current Output Frequency Sets the output current to the calculated current Default mode Medium Output Sets the output current to 12mA After one minute resets to the calculated output current Continuous Display Continuously sends the cal
9. ctions The following figures illustrate the typical input and output connections for the various pickup types HP 297 14 Installation MAG Coil Input LJ bs gt 4 20mA 8 24Vdc D 4 20mA O CONTACT MAG SIG s COIL N SIG Switch Settings q R sw sw2 N 4 LOAD 1 1 4 TTL Redi Pulse Pick up QV ere 4 20mA 4 20mA White C SIG a Black B 2 WI SIG REDI PULSE COIL R N x LOAD TTL Pulse 51 Switch Settings J 297 Installation 8 24Vde Reed Switch Input gt 4 20mA 4 20 CONTACT REED SWITCH SIG SIG Switch Settings SW1 SW2 s INPUT RS232 15 LOAD HP 297 16 Installation 5 2 Communications Connections Communications with the HIT 1B using a terminal or a PC using the Windows configuration program requires the use of the HOFFER HIT 903 Communications Cable The communication circuits of the HIT 1B are externally powered and the po
10. culated frequency and flow rate values to the attached terminal The following table lists the various monitoring diagnostic commands available for the HIT 1 transmitter along with the response from the HIT 1 for each command Description Read Response Command Continuously display AA lt CR gt Frequency and Flowrate RXXXXX XX Dump Configuration DA lt CR gt Dump settings to terminal Set Output to maximum lt gt Output 20 mA Set Output to minimum OI lt CR gt Output 4 mA Set Output to Frequency OF lt CR gt Output freq scale scale Set Output to 12 mA lt gt Output 12 mA To terminate or interrupt any Monitoring Diagnostic command send another command other than the one currently in use HP 297 Configuration 11 43 Default Configuration The HIT 1 is configured by the factory before shipment If the unit is purchased with a Hoffer Flowmeter or if calibration data and configuration information is supplied the unit is configured as appropriate If the unit is shipped without specific configuration information the unit is configured with the following default values FIELD Value DN 00000000 AF 500 00 NB 1 00 CF 1 00 FM 0 FC 0 AK 100 00 NP 20 01 10 00 202 50 00 F03 90 00 F04 100 00 F05 200 00 F06 300 00 F07 400
11. e appropriate manual s and or drawing s Identify all model numbers exactly before making any connections A number of options and accessories may be added to the main instrument which are not shown on the basic user wiring Consult the appropriate option or accessory user manual before connecting it to the system In many cases a system wiring drawing is available and may be requested from Hoffer Flow Controls This document contains proprietary information which is protected by copyright All rights are reserved No part of this document may be photocopied reproduced or translated to another language without the prior written consent of Hoffer Flow Controls Inc HOFFER FLOW CONTROLS policy is to make running changes not model changes whenever an improvement is possible This affords our customers the latest in technology and engineering The information contained in this document is subject to change without notice THIS WARRANTY IS EXPRESSLY IN LIEU ALL OTHER WARRANTIES EXPRESSED OR IMPLIED INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE HFC SHALL NOT BE LIABLE FOR ANY LOSS OR DAMAGE RESULTING DIRECTLY OR INDIRECTLY FROM THE USE OR LOSS OF USE OF THE GOODS WITHOUT LIMITING THE GENERALITY OF THE FOREGOING THIS EXCLUSION FROM LIABILITY EMBRACES THE PURCHASER S EXPENSES FOR DOWNTIME OR FOR MAKING UP DOWNTIME DAMAGES FOR WHICH THE PURCHASER MAY BE LIABLE TO OTHER PERSONS DAMAGES TO PROP
12. nctional Blocks 3 1 1 Preamplifier The Preamplifier accepts the input from the flowmeter The Preamplifier applies amplification low pass filtering and wave shaping to the input signal The wave shaping function converts the signal into a square wave before sending it to the Microcontroller 3 1 2 Microcontroller The Microcontroller accepts the square wave output of the preamplifier and performs all of the calculations that are required to control the Loop Driver After measuring the frequency of the square wave the Microcontroller uses the following equations to compute the flow rate and current Jrequency flowrate Kfactor HP 297 6 Theory of Operation Where Kfactor Is dependent on the Flow Calculation Method setting and is either the Average K Factor or the Linearized K Factor from the Frequency K Factor table FM Is the Flow rate Units setting of 0 1 2 Where 0 is for Seconds 1 is for Minutes and 2 is for Hours CF Is the Correction Factor setting flowrate current 4mA 16mAx Where AF Is the 20 mA maximum Flow rate value If the calculated flowrate is greater than the AF setting the current will be set to 24mA to signal an Over range condition After calculating the current the Microcontroller digitally sends the current information to the Loop Driver 3 1 3 Loop Driver The loop driver uses the digital information sent to it by the Microcontr
13. ods will be disposed of in HFC s discretion HFC does not warrant the product to meet the requirements of any safety code of any state municipality or other jurisdiction and Purchaser assumes all risk and liability whatsoever resulting from the use thereof whether used singlely or in combination with other machines or apparatus This warranty shall not apply to any HFC product or parts thereof which have been repaired outside HFC s factory or altered in any way or have been subject to misuse negligence or accident have not been operated in accordance with HFC s printed instructions or have been operated under conditions more severe than or otherwise exceeding those set forth in the specifications FOR NON WARRANTY REPAIRS OR CALIBRATIONS consult HOFFER FLOW CONTROLS for current repair calibration charges Have the following information available BEFORE contacting HOFFER FLOW CONTROLS 1 P O number to cover the COST of the repair calibration 2 Model and serial number of the product and 3 Repair instructions and or specific problems relative to the product HFC 9907 A CONTENTS 1 1 1 1 Model Number Designation 2 2 Specifications 1 3 2 1 General 3 2 2
14. oller to set the current of the loop The Loop Driver supplies power to both the Preamplifier and Microcontroller 3 1 4 Communications Interface The Communications Interface provides an RS232C port to the Microcontroller The power for the Communication Interface is provided by the external terminal device The Communications Interface is used to configure and trouble shoot the transmitter 3 2 System Response Time The output current response time to flow rate changes depends on the frequency of the input signal The response time varies from 0 25 seconds to the Maximum Sample Time MST setting The MST setting is adjustable from 1 to 10 seconds If the input frequency is greater then 4 Hz the output is updated every 0 25 seconds regardless of the MST setting When the flow rate drops to 0 the output drops to 4mA after the time set by MST If the input frequency is less than 4 Hz the output update time is equal to the period of the input signal 1 1 second 2Hz 0 5 second The MST setting should be set to a number higher than the period of the lowest input frequency HP 297 Configuration 7 4 CONFIGURATION The HIT 1 is configured using either a PC running Terminal Emulation software or a dumb ASCII terminal The PC terminal RS232C serial port configuration must be set as follows Baud rate 2400 Data bits 8 Parity none Stop bits 1 Handshaking none The transmitter configuration is set and o
15. r displayed by sending a series of character commands via the communications port to the unit There are two types of commands READ and WRITE READ commands lt command gt lt CR gt upload data from the unit to the terminal and WRITE commands lt command gt lt value gt lt CR gt download data from the terminal to the unit Each command is terminated with a Carriage Return CR If an invalid command is sent the unit will respond with the message Invalid Command or will return the complete command list The complete command list is returned anytime a single Carriage Return CR character is sent to the unit The following sections discuss the various commands available for the 1 297 8 Configuration 4 1 Command HP 297 Configuration Commands DN AF NB CF FM FC AK NP FHH K Description Tag Number User defined ID number Maximum 999999 20mA Maximum Flowrate Flow rate for 20mA output Maximum Sample Time This is the maximum time in seconds that the HIT 1 samples the input frequency before returning zero Output 4 mA Default value 1 second Maximum value 10 seconds Recommend changing only for minimum input frequencies of less than 1 0 Hz Correction Factor User defined factor to multiply the flow rate calculation Default value 1 Flowrate Units Sets the flow rate time units 0 for SEC 1 for MIN 2 for HR or 3 for DAY
16. s 3 2 SPECIFICATIONS 2 1 2 2 General Input Frequency Range DC power Load Resistance Output Output Resolution Accuracy Temperature Drift Linearity Update Time Linearization Timebase Scale Communications Physical Temperature Packaging Dimensions for General Purpose AC or DC signal 10 to 50 Magnetic coil Pulse Open Collector Dry Contact 0 2 to 3500 Hz 8 to 24 Vdc loop powered 650 O 24 Linearized 4 20 mA proportional to flow rate Over Range capability 24 mA 16 bit 0 2 WA 0 02 of full scale 20 C 40 ppm C 0 05 of full scale 0 25 to 10 seconds Twenty point K factor table Rate can be configured in units per second minute hour or day The 20mA point is configurable RS232 for configuration and monitoring Operating 40 C to 80 C General Purpose Explosion proof amp DIN rail 1 47 38 mm wide x 2 55 65 mm long x 1 90 49 mm tall mounting footprint 2 535 65 mm x 2 550 65 mm HP 297 4 Specifications This page intentionally left blank HP 297 Theory of Operation 5 3 THEORY OF OPERATION The HIT 1 consists of four functional blocks These functional blocks are the Preamplifier Microcontroller Loop Driver Communications Interface Hoffer s Intelligent Transmitter HIT1 POWER Flowmeter input Microcontroller 3 1 Fu
17. vided in the following paragraphs In the event Purchaser believes the Hoffer product is defective the product must be returned to HFC transportation prepaid by Purchaser within the appropriate warranty period relative to the product If HFC s inspection determines that the workmanship or materials are defective and the required maintenance has been performed and has been properly installed and operated the product will be either repaired or replaced at HFC s sole determination free of additional charge and the goods will be returned transportation paid by HFC using a transportation method selected by HFC Prior to returning the product to HFC Purchaser must obtain a Returned Material Authorization RMA Number from HFC s Customer Service Department within 30 days after discovery of a purported breach of warranty but not later than the warranty period otherwise such claims shall be deemed waived See the Return Requests inquiries Section of this manual If HFC s inspection reveals the Hoffer product to be free of defects in material and workmanship or such inspection reveals the goods were improperly used improperly installed and or improperly selected for service intended HFC will notify the purchaser in writing and will deliver the goods back to Purchaser upon receipt of Purchaser s written instructions and agreement to pay the cost of transportation If Purchaser does not respond within thirty 30 days after notice from HFC the go
18. wer for these circuits is supplied by the RS232 serial port of the computer terminal The serial port configuration must be set to the following Baud rate 2400 Data bits 8 Parity none Stop bits 1 Handshaking none DB9 cil C X NS 52716 DSR 1 2 mn V RTS 3 r 4 amp CTS 5 4 O 6 19 SIG 5 Hoffer HIT 903 Communications Cable 5 3 Wiring When connecting the HIT 1 it is good practice to use shielded cable The shield should be connected to earth ground near the instrument The other end of the shield should not be connected In order to comply with the requirements for Electromagnetic Compatibility as per EMC Directive 89 336 EEC of the Council of European Community this wiring practice is mandatory HP 297
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