Field Mounted Rate/Totalizer USER`S MANUAL
Contents
1. 6 2 3 Loop Powered 4 20mA Output Version 6 2 4 Power Alarm Version 7 2 5 Physical 7 3 2 9 3 1 Display 9 3 1 1 Front Panel Operation 9 3 2 Test Mode 10 3 3 Filtering 10 3 4 Calculation of Rate and Total 12 3 5 Total Conversion 13 3 6 Non linearity Correction Feature 14 4 Configuring 2 15 4 1 Configuration Steps 16 4 2 Example 20 5 8 1 21 5 1 Battery Powered Version 21 5 2 4 20mA Output with Alarms Version 22 5 3 DC POWER VERSION 24 6 Flowmeter Input 27 72. Freq Point whole number INP Input Freq Point numbers after the decimal point Input points must be entered in ascending order OUT 14 Output Scaling Factor Point whole number OUT 14 Output Scaling Factor Point numbers after the decimal point Output points must NOT be set to zero SOFT Software Version Model 302di HP 295 Configuring 19 4 2 Example A flowmeter produces 20 538 pulses per gallon and has a maximum output frequency of 200Hz It is required to display the flowrate in gallon min with 1 digit to the left of the decimal point and the total in gallon with no digits to the left of the decimal A 4 20mA output is installed and 4mA is to represent 0 gallon m and 20mA is to represent 500 gallon m The instrument is then programmed as follows The Calibration Mode is entered by removing the lower cover strip i e the dark gray strip along the bottom of the enclosure and flip it end for end and replacing it back on the enclosure The following values are then entered Step Value Description CALDO 0 No Pulse Output CALDI 00020 Scaling Factor Whole Numbers CALO 5380 Scaling Factor Decimals CALCI 0 25 Cutoff Frequency CALOY 1 Rate decimal position CARLOS 1 Timebase CALOS 01 Filter disabled CALCI 0 Total decimal position CRLO8 0001 Total Conversion set to 1 0000 CARLOS 0000 Total Conversion decimals CALIO 00000 Low Alarm not installed CALI 0000 Low Alarm not installed C
3. Nu esrepereTteterere lolol O O Fa Plug in Terminals Panel Mount Bracket Model 302di HP 295 Installation 35 8 3 Removing The Front Panel The front of the instrument is removed as follows 1 Remove both the top and bottom cover strips i e the dark plastic strips on the front by levering a screwdriver under one end 2 Undo the seven screws retaining the front Note that the screws should not be removed from the front panel as they are retained by O rings 3 Pullthe front panel free from the housing Replacing the front panel of the instrument is the reverse procedure However ensure that the front panel is aligned at both connector points before tightening the screws Model 302di HP 295 36 Installation TOTAL 253551 we 5341 EE ren Es PROGRAM a 7 Model 302di HP 295 Installation 37 8 4 The Main Electronics The front section of the housing contains the microprocessor batteries and display When replacing the lithium battery packs only one battery pack should be replaced at a time so that there is always one pack connected to power the memory It is also possible to adjust the display contrast via a small potentiometer on the board The DISPLAY CONTRAST control is shown below and this
4. 2 4 DC Power Alarm Version Outputs Switching Power DC Power Input Supply Backup Pulse Duration 2 5 Physical Temperature Dimensions Protection Cable Entry Wall Mounting Pipe Mounting Turbine Meter Adapter Panel Mounting Model 302di Two open collector outputs suitable for driving DC solenoids or external relays The outputs provide high and low flow alarms or low flow alarm and pulse output 200mA 30VDC maximum 9 28 Volt at 4mA maximum Lithium battery 1ms if CALO 2 unscaled pulse output If CALO 1 scaled pulse output automatically adjusts to the output frequency a lms output gt 50Hz b 10ms output 5 50Hz c 100ms output lt SHz Operating 20 C to 60 C 97mm 3 8 high x 150mm 5 9 wide x 41mm 1 6 deep cable glands not included Sealed to Nema 4X or IP67 standards By cable glands Universal Mounting Bracket supplied Standard A galvanized metal bracket is available which enables the Model 302d to be attached to a 2 vertical or horizontal pipe An optional mounting stem is available for mounting the Model 302d directly on turbine flowmeters which have a 1 MNPT boss Supplied with mounting brackets Terminals accessible from the rear Not watertight Cutout 141mm 5 6 wide x 87mm 3 4 high HP 295 8 Operation 3 OPERATION The Model 302d Rate Totalizer accepts a frequency or pulse input from a wide range of flowmeters The instrument is fully
5. 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 HFC SHALL NOT BE LIABLE FOR ANY OTHER DAMAGES WHATSOEVER INCLUDING INDIRECT INCIDENTAL OR CONSEQUENTIALDAMAGES HFC 9907 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 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 provided in the following paragraphs In the event Purchaser believes the Hoffer pr
6. and or pulse outputs are NOT supported if the DC power is interrupted Open collector outputs are also provided for high and low flowrate alarms If a pulse output is programmed terminals 5 amp 6 act as a pulse out The outputs can sink up to 200mA and can be used to control external relays lights or audible alarms The outputs are internally protected against voltage spikes which can be caused by relays and coils Both outputs are separately isolated via opto isolators The switching points can be programmed during the setup mode and the low flow alarm will switch on whenever the flowrate drops below the programmed flowrate Similarly the high alarm switches on whenever the flow exceeds the high setpoint If a Scaled Pulse Output is programmed a pulse will be output every preset value of total For example if the total is in gallons then programming 5 will output one pulse every 5 gallons If an Unscaled Pulse Output is programmed output pulses will follow the input frequency from the flowmeter Specification for Alarm Outputs Maximum Current sink 200mA Maximum Voltage 30VDC Saturation Voltage 0 8VDC across outputs when in the ON state Isolation Both outputs are separately isolated Pulse Frequency 500Hz maximum Pulse Duration 1ms if CALO 2 unscaled pulse output If CALO 1 scaled pulse output the duration automatically adjusts to the output frequency a lms for output gt 50Hz b 10ms for
7. can be adjusted for optimum contrast Adjacent to this control is a RESET switch which can be used to reset the microprocessor Note that pressing this button will reset all Setup Parameters and set all totals to zero DISPLAY CONTRAST RESET BATTERY CONNECTOR de gar 00 i n zt BATTERY gt T lt BATTERY 0 BATTERY CONNECTOR The Main Electronics Model 302di HP 295 38 Installation 8 5 Wiring When connecting the Model 302d 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 8 6 Terminal Designations All Versions 7 Pulse Input Coil Input 8 Pulse Input Coil Input 3 Low Alarm 4 Low Alarm 5 High Alarm Pulse Output 6 High Alarm Pulse Output 4 20mA Output 1 4 20mA 2 4 20mA DC Power Versions 1 DC Power OV 2 DC Power 9 to 28 VDC Model 302di HP 295
8. configurable with all operating parameters and calculation constants configurable from the front panel The setup parameters are stored in a non volatile memory and are retained for at least 10 years in the event of a power loss 3 1 Display The Model 3024 Rate Totalizer will display Rate Resettable Total Accumulated Total Both the Rate and Resettable Total are continuously displayed while the Accumulated Total is only displayed when the ACCUM TOTAL key is pressed The Resettable Total can be reset at any time by pressing the RESET key 3 1 1 Front Panel Operation The keys on the front panel have the following functions siya TOTAL This key displays the Accumulated Total J RESET This key resets the Resettable Total at any time LA i PROGRAM This key is used during the Program Mode Model 302di HP 295 Operation 9 3 2 Test Mode The instrument has a Test Mode which can be entered by simultaneously pressing all three front panel keys The tests are as follows TOTAL Lo Test By pressing the key the low alarm output if installed will go low If a 4 20mA option is installed the output will go to 4mA RESET Hi Test By pressing the key and depending on the programmed pulse output mode the high alarm output if installed will a go low if CALO 0 high alarm output b output 100ms pulses every 0 5 sec if CALO 1 scaled pulse output output 1ms pulses every 0 5 sec if CALO 2 unsca
9. output 5 50Hz c 100ms for output lt 5Hz Model 302di HP 295 24 Versions Connections Model 302di lt 2 Low Alarm lt lt 27 High Alarm Relays with DC Coils HP 295 Flowmeter Input 25 6 FLOWMETER INPUT The Model 302d has an input conditioning circuit which will accept signals from most pulse or frequency producing flowmeters Links on the rear panel enables the input circuit to be configured for the different signal types The input will interface directly to Turbine Flowmeters Open Collector Outputs Reed Switches Logic Signals Two Wire Proximity Switches The following pages give examples of interconnection to various signal outputs and a circuit diagram of the input is also provided For pulse or logic type signals the input switching threshold is 1 3 volts Hence the input signal must have a LOW voltage of less than 1 2 volts and a HIGH voltage of greater than 1 4 volts For flowmeters with coils the minimum input voltage is 15mV All inputs are protected for over voltage up to 28 volts Model 302di HP 295 26 Flowmeter Input Ipull up OuA PULSE link not installed Ipull up 15uA PULSE link no external power 33V Tpull up 150uA PULSE link external power amp ji INPUT COMPARATOR 825R got C1 NPS 825R 10 Simplified Frequency Inpu
10. ALI 00000 High Alarm not installed CALI 0000 High Alarm not installed CALI 00000 4mA Output Whole Numbers CALIS 0000 4mA Output Decimals CALI 00500 20mA Output Whole Numbers CALTI 0000 20mA Output Decimals SOFT 1 01 Software Version CARD 0 Battery Version input card Model 302di HP 295 20 Versions 5 VERSIONS 5 1 Battery Powered Version The battery powered version of the Model 302d is designed for operation in the field without external power sources Lithium batteries provide sufficient power to operate the instrument for up to 5 years and the operator is warned of a low power condition by a message on the LCD display New batteries can be purchased from Hoffer Flow Controls Inc and can be replaced in the field without compromising the IS approvals There are two battery packs in each instrument and care must be taken to replace only one pack at a time so that there is always power connected to the memory Failure to do this may result in the loss of setup parameters and totals Model 302di HP 295 Versions 21 5 2 4 20mA Output with Alarms Version this version combines the features of the DC powered with a 4 20mA output The 4 20mA output provides a two wire re transmission of the flowrate Both the 4mA and 20mA points are fully configurable so that the output can span across the entire operating range or alternatively across a small section of the operating range The instrument draws its operating p
11. CAL 3 CAL CALS Model 302di Comment Pulse Output applies to DC Power Alarm version only 0 No pulse output low high alarms 1 Scaled pulse output and low alarm 2 Unscaled pulse output and low alarm Scaling Factor whole number Scaling Factor numbers after the decimal point The Scaling Factor is the pulses per unit of measure e g pulses litre pulses gallon etc The Scaling Factor can be programmed in the range of 0 000001 999 999 Cutoff Frequency This determines the Cutoff Frequency in the range of 0 01 0 99Hz the default setting is 0 25 Hz NOTE Care must be taken when setting this value as a low value may cause a slow update time Decimal Point for Rate Display The flowrate can be displayed with 0 1 2 or 3 decimal places e g 2 000 Timebase for Rate The Rate can be displayed in units per second minute hour or day 0 second 1 minute 2 hour 3 day HP 295 16 Configuring Step CAL CALI CAL 8 CALS CAL 10 CAL T Model 302di Comment Filter The filter constant for filtering the input signal 1 No filtering to 99 Very heavy filtering Decimal Point for Total Display The totals can be displayed with 0 1 2 or 3 decimal places e g 2 000 Total Conversion Factor whole number Total Conversion Factor numbers after the decimal point The Total Conversion Factor enables the Rate to be displayed in one engineering unit a
12. Intrinsic Safety Connections 31 7 1 8 31 7 2 Simple Apparatus 31 7 3 Alarm Outputs 33 8 Installation 35 8 1 Wall Mounting 35 8 2 Panel Mount Version 36 8 3 Removing The Front Panel 37 8 4 The Main Electronics 39 8 5 Wiring e eee nr rene 40 8 6 Terminal Designations 40 Model 302di HP 295 Model 302di HP 295 Introduction 1 1 INTRODUCTION The Model 302d Rate Totalizer is a microprocessor based instrument which accepts frequency or pulse inputs from a wide range of flowmeters The instrument displays Flowrate a Resettable Total and an Accumulated Total directly in engineering units The instrument is compatible with a wide range of flowmeters Links on the input board enable the circuit to be configured for millivolt signals reed switches pulse trains and most other signal types Three different versions of the instrument are available 1 A Battery Powered version with no outputs A Loop Power
13. LLED OUT n APPROVALS OPTIONAL APPROVALS UNDER CEN OPTION INTRINSICALLY SAFE WATER TIGHT TO IP67 NEMA 4X The Model 302di Model 302di HP 295 4 Introduction 1 2 Intrinsic Safety Considerations The Model 302d is certified for use in hazardous areas and has both CENELEC and CSA C NRTL approvals The Model 302d certification details are CENELEC Approval 98 E 1873 Type of Protection EX ia Group Temperature Class T4 at ambient temperature of 60 C CSA C NRTL Approval File Number LR 104 840 5 Type Class 1 Groups C and D When installing in hazardous areas the instrument must be installed according to the guidelines in Section 6 and in accordance with standards for wiring and installation in hazardous areas Flowmeter Inputs Entity Parameters on the flowmeter input enable connection to a wide range of approved sensors Input Parameters are Ui 24V Ii 20mA Pi 320mW The internal capacitance and inductance seen on these terminals is 0 002 WF and 0 mH Output Parameters are Uo 10 0V Io 9 0mA Maximum allowed external capacitance is 60 uF Maximum allowed external inductance is 1 5H Model 302di HP 295 Introduction 5 4 20mA DC Power The input can be connected to IS circuits with the following maximum values Ui 28V Ili 93mA Pi 653mW The internal capacitance and inductance seen on these terminals is 0 1 uF a
14. MODEL 302di Field Mounted Rate Totalizer USER S MANUAL HP 295 November 2002 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 DROGHE 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 DR for an damages that result from the use of the products in accordance wit 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 the appropriate ma
15. TION O LITHIUM BATTERY INTRINSICALLY SAFE QL 9 28 VDC POWER WITH LO ALARM AND HI ALARM OR AN OPEN COLLECTOR OPTO ISOLATED PULSE OUTPUT USER SELECTABLE MEMORY BACKUP WITH LITHIUM BATTERY 4L LOOP POWERED WITH LO ALARM AND HI ALARM OR AN OPEN COLLECTOR OPTO ISOLATED PULSE OUTPUT USER SELECTABLE INTRINSICALLY SAFE WITH BARRIER IN SAFE AREA MEMORY BACKUP WITH LITHIUM BATTERY NOTE SPECIFY DC POWER OPTION 3 WHEN USING A REDI PULSE COIL INPUT BATTERY VERSION IS NOT AVAILABLE FOR USE WITH THE RED PULSE COIL LOOP POWERED OPTION 4L MAY BE SPECIFIED HOWEVER REDI PULSE COIL MUST HAVE AN ISOLATED DC POWER SUPPLY Model 302di HP 295 Introduction 3 OPTIONS MODEL 302di OPTION CE INTERFERENCE CE COMPLIANCE WITH CSA APPROVAL CEN CENELEC NRTL C AND SAA APPROVAL CE CEN WHEN BOTH APPROVALS REQUIRED 2 10 POINT LINEARIZATION NOTES 1 MUST USE ISM INTRINSICALLY SAFE MAGNETIC COIL FOR INTRINSICALLY SAFE SYSTEM 2 STANDARD COILS ARE SUITABLE FOR SYSTEMS THAT DO NOT REQUIRE INTRINSICALLY SAFE 3 LCD DISPLAY 7 DIGIT 0 4 10MM TOTAL CONTINUOUSLY DISPLAYED 5 DIGIT 0 33 85MM CONTINUOUSLY DISPLAYED RATE ACCUMULATED DISPLAYED BY KEY DEPRESSION 4 BATTERY LIFE FULL 2 YEARS IF CONTINUOUSLY USED 1 RISER IS REQUIRED ON TURBINE FOR MOUNTING OPTION 3 4 OR 5 6 GALVANIZED METAL BRACKET ENABLES THE UNIT TO BE ATTACHED TO A 2 VERTICALOR HORIZONTAL PIPE 7 10 POINT LINEARIZATION MUST BE CA
16. ed version with 4 20mA output and alarms pulse output 3 ADC Powered version with either high and low flow alarms or low flow alarm and pulse output The Model 302d is fully configurable with K factors decimal point positions filter constants and timebase being programmed via the front panel switches This instrument conforms to the EMC Directive of the Council of European Communities 89 336 EEC and the following standards Generic Emission Standard EN 5008 1 1 Residential Commercial amp Light Industry Environment Generic Emission Standard EN 50081 2 Industrial Environment Generic Emission Standard EN 50082 1 Residential Commercial amp Light Industry Environment Generic Emission Standard EN 50082 2 Industrial Environment In order to comply with these standards the wiring instructions in Section 8 5 must be followed Model 302di HP 295 2 Introduction 1 1 Model Number Designation MODEL 302di DC POWERED RATE TOTALI ZER I NTRI NSI CALLY SAFE TO BE USED ONLY WHEN APPROVALS ARE REQUIRED MODEL 302di TYPE OF MOUNTING POWER OPTIONS OPTIONS TYPE OF MOUNTING MODEL 302di OPTION 1 PANEL MOUNT Q WALL MOUNT WITH CABLE GLANDS 3 EXPLOSION PROOF WITH 1 BOTTOM MOUNT WITH UNION SEE NOTE 5 4 1 NPT BOTTOM MOUNT WITH UNION SEE NOTE 5 5 1 NPT REAR MOUNT WITH UNION SEE NOTE 5 6 2 GALVANIZED PIPE BRACKET SEE NOTE 6 POWER OPTIONS MODEL302di OP
17. el 302d without certification Model 302di HP 295 30 Intrinsic Safety Connections uoissmusue ow yvul z p s19jourg eq jndug ANHUZS 4 1 MU ld H S l 00 an 09 In 200 19 vu 06 O oz l A0 0L on Ave 10 8 Z sjeuue SUILINVHYd 1NdNI H3ZIIVLOL 31 VH P20 TIH3GON V3 V SNOCUVZVH wy S gt Bua X3 1 oz 002 0 1 X3 HOI EGHM tH x3 88rZz x3 egvz xa eevz SHONI 8 Td3dd3d svoy Lvov rt 1772 ZvOE 1708 46 82 282 UN 00 60 082 1 2006 15 SualHHva JOLLIEQ p lo l s 10 peyloeds gt u 1 659 Od 6 0 A 82 Jeeg S Jr wyo 008 OY S I IWNOLLdO d001 IN3HUNI 02 V3HV 34VS HP 295 Model 302di Intrinsic Safety Connections 31 7 5 Alarm Outputs The low alarm and high alarm pulse output can be connected to suitably certified devices providing the circuit is protected with a barrier with the maximum safety parameters Uo 28V Io 93mA Pmax 653mW The maximum allowed capacitance and inductance of the pulser or coil including cabling is Cext 60uF Lext 1 5H The input capacitance on these terminals is O luF max and the inductance is negligible Note that the two alarm outputs must be kept as independent IS circuits and each
18. ersion factor affects the resettable and accumulated totals For Example If the Rate is required in gallons per minute 1 The Scaling Factor would be configured as pulses per gallon 2 The timebase would be configured as minutes If the Totals are required in barrels 3 The Total Conversion factor is configured as 42 there are 42 gallons in a barrel All totals will now totalize in barrels Some common units are given below together with the Total Conversion constant which should be configured Rate Totals TOTCON Gallons US Barrels oil 42 000 Litres Kilolitres 1000 ml Litres 1000 Mgallons Acre feet 0 32587 Units per second minute hour or day The timebase is configured separately during Configuration Model 302di HP 295 Operation 13 3 6 Non linearity Correction Feature This optional feature allows the instrument to be used with non linear flowmeters providing up to 10 non linearity corrections points The following diagram graphs the change in scaling factor with frequency for a hypothetical flowmeter The heavy line represents the actual scaling factor of the flowmeter while the light line is the approximation used in the instrument Scaling Factor A Frequenc 0 Inp 1 Inp2 Inp3 Inp 4 Inp 5 A d Y Up to 10 frequencies and scaling factors may be configured Frequencies must be entered in ascending order Linear Interpolation is used between points If the input frequency is below
19. led pulse output If a 4 20mA option is installed the output will go to 20mA PROGRAM Display Test pressing the key all segments of the display will flash To exit the test mode all three front panel keys are pressed simultaneously 3 3 Filtering Frequency fluctuations caused by pulsating flow through a flowmeter can interfere with the precision of Rate For this reason the Model 302d Rate Totalizer has a digital filter which will average out these fluctuations and enable accurate readings The degree of filtering of the input signal can be adjusted depending on the amount of fluctuation and the particular application Values from 1 to 99 can be programmed where 1 corresponds to no filtering and 99 corresponds to heavy filtering Such flexibility in filtering means that highly accurate and stable readings can be obtained while minimizing excessive lag Model 302di HP 295 10 Operation When programming the degree of filtering it is advisable to start with no filtering the factor equals 1 and gradually increase until a steady reading is obtained It is important that the filtering is not too heavy because this will cause an overdamped response The diagram below shows a pulsating signal input together with the effect of filtering Rate Filtered Response Unfiltered Response Time As a guideline to the degree of filtering to be used the following table shows the response to a step change in in
20. nd 0 mH Relay Outputs The output can be connected to IS circuits with the following maximum values Ui 28V Ili 93mA Pi 653mW The internal capacitance and inductance seen on these terminals is 0 1 uF and 0 mH Model 302di HP 295 6 Specifications 2 SPECIFICATIONS 2 1 General Display Resettable Total Accumulated Total Rate K factor Decimal Points Timebase Frequency Range Signal Type LCD continuously powered 7 digits with 10mm 0 4 high digits Resettable from front panel Displayed when the ACCUM TOTAL button is pressed 4 digits with 8 5mm 0 33 high digits The pulses per unit of measure e g pulses gallon is configurable in the range 0 000001 to 999 999 Decimal Point positions are fully configurable for both rate and total Rate can be displayed in units per second minute hour or day 0 01Hz to 10kHz Link settable for Sinewave 15mV P P minimum Open Collector Reed Switch or Pulse 2 2 Battery Powered Version Type Battery Life Two lithium battery packs 5 years typical 2 3 Loop Powered 4 20mA Output Version Scale Resolution amp Linearity Accuracy Update Time Connection Loop Power Supply Supply Backup Model 302di The 4mA and 20mA points are configurable 0 05 of span 0 05 of span 25 C 0 1 typ of span full temperature range 0 5 seconds Two wire 9 28 volts Lithium battery HP 295 Specifications 7
21. nd the Totals to be displayed in another engineering unit The Total Conversion Factor can be programmed in the range of 0 000001 999 999 Set to 1 000 if totals and rate are in the same unit e g litres Low Alarm whole number Low Alarm numbers after the decimal point CAL 10 amp 11 program the flowrate below which the low alarm relay will close The value can be programmed in the range 0 to 999 999 HP 295 Configuring 17 Step Comment CALIE High Alarm Pulse Output Factor whole number CAL 13 High Alarm Pulse Output Factor numbers after the decimal point CAL 12 amp 13 program the flowrate above which the high alarm relay will close The value can be programmed in the range 0 to 999 999 If the scaled pulse output is selected CALO 2 then the value represents the total per pulse e g 5 gallons per pulse CAL TH Re transmission whole number CAL 15 4mA Re transmission numbers after the decimal point CAL 14 amp CAL 15 represent the flowrate at which 4mA will be output CALIE 20mA Re transmission whole number CALTI 20mA Re transmission numbers after the decimal point CAL 16 amp 17 represent the flowrate at which 20mA will be output CALIE Number of non linearity correction points 00 Non linearity correction disabled xx Non linearity correction enabled points to enter Maximum 10 points Model 302di HP 295 18 Configuring Step Comment INP
22. nual 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 OF ALL OTHER WARRANTIES EXPRESSED OR IMPLIED INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR 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 PROPERTY AND INJURY
23. o 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 or 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 CONTENTS 1 Introduction ___________ _ 1 1 1 Model Number Designation 2 1 2 Intrinsic Safety Considerations 4 2 Specifications 6 2 I General 6 2 2 Battery Powered Version
24. oduct 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 goods will be disposed of in HFC s discretion HFC does not warrant the product t
25. or reed input with contact bounce link DBL can be installed This will eliminate the effect of switch bounce while limiting the input frequency to 200Hz Model 302di HP 295 Intrinsic Safety Connections 7 INTRINSIC SAFETY CONNECTIONS When installing the Model 302d in hazardous areas the wiring and installation must comply with appropriate installation standards The approval uses entity parameters on the input for connections to the flowmeter and an associated apparatus type approval for the 4 20mA output The 4 20mA output must therefore only be connected as shown on the following page to barriers with the specified parameters 7 1 Coils The Model 302d will connect directly to a turbine flowmeter with a certified IS coil or other certified IS sensor which produce a pulse output provided they do not exceed the following input parameters Ui 24V 20mA Pi 2 320mW The maximum allowed capacitance and inductance of the pulser or coil including cabling is Cext 60uF Lext 1 5H The internal capacitance and inductance of the Model 3024 seen on the input are negligibly small with Ci 0 02uF and Li OmH The maximum voltage and current produced on the inputs terminals 8 amp 7 are Uo 10 0 volts open circuit Io 9 0mA short circuit 7 2 Simple Apparatus Devices such as reed switches which can be classed as Simple Apparatus as defined in the CENELEC standard EN50020 can be connected to the Mod
26. ower from the 4 20mA loop and lithium batteries for backup if the 4 20mA loop is interrupted The alarm pulse outputs are NOT supported if the 4 20mA loop is interrupted Specification Resolution amp Linearity 0 05 of span Accuracy 0 05 of span at 25 C 0 1 typ of span full temperature range Response 4mA to 20mA 0 5 Seconds Loop Power Supply 9 28 VDC Important Since the 4 20mA output is designed to provide power to the Model 302d it is not isolated from the input Hence all sensors must be self powering such as MAG coils amp reed switches If external power is required to power the sensor e g Redi Pulse pick ups Hall Effect sensors or opto sensors the power supply delivering the external power must be isolated from the 4 20mA loop supply Model 302di HP 295 22 Versions Typical Connection Model 302d Mag Coil Connection to a Sensor requiring External Power 8 30 Vde oy AAS NY Isolated Supply WB Redi Pulse Model 302d Receiving Instrument Model 302di HP 295 Versions 23 5 3 DC Power Version The DC Power version operates from an external power source between 9 28VDC and draws no more than 4mA This enables the instrument to be powered from AC adapters and eliminates the need to run AC voltages in the field The instrument uses lithium batteries for backup if the DC power is interrupted However alarms
27. protected with their own barrier It is not permissible to connect these circuits via a common barrier Model 302di HP 295 32 Intrinsic Safety Connections mdino 4 YAZIIVLOL ALVY TACOW uxad eevz x3 esvz x3 gevz SHOfH 8 1Hddd3d 98484 282 11IN 00 60 082 1 2006 IUEIS Sualduvg F1dNVXI MU 69 od LUNWIXELU 6 o A 82 on saweg SI saweg S I PIOUS OS 6140 duue ue se yons PEED SI VIYV SNOCHVZWVH VIUV 34VS HP 295 Model 302di Installation 8 INSTALLATION 8 1 Wall Mounting A wall mounting bracket is supplied with each instrument The bracket should be attached to the wall using round head screws do not use counter sunk screws The bracket is mounted with the tray section at the bottom The instrument is then attached to the bracket at the bottom with two screws see diagram below jrom 1263651 RATE 2S Model 302di HP 295 33 34 Installation 8 2 Panel Mount Version The panel mount version of the Model 302d is supplied with two panel mounting brackets and plug in terminals which are accessible from the rear of the instrument A diagram of the rear panel is shown below Thumb Screw 4 INPUT RELAY2 RELAY POWER EP GE FE on
28. put The value CAL 6 is the filter constant which is entered during the configuration routine The times for the display value to reach 90 and 99 of full swing are given in seconds for different values of CAL 6 A 90 99 1 00 0 00 0 00 2 00 1 00 2 00 4 00 2 00 4 00 6 00 3 00 6 00 10 00 5 00 11 00 15 00 8 00 17 00 20 00 11 00 22 00 25 00 14 00 28 00 35 00 20 00 40 00 45 00 25 00 51 00 60 00 34 00 69 00 75 00 43 00 86 00 90 00 52 00 103 00 99 00 57 00 113 00 Table 1 Response to a step Input in seconds Note that if CAL 6 is set to 01 there is no filtering of the input signal Model 302di HP 295 Operation 11 3 4 Calculation of Rate and Total The flowrate R is calculated as follows where f is the input frequency in Hz is the timebase of rate and is 1 for seconds 60 for minutes 3600 for hours and 86 400 for days S 15 Scaling Factor The Scaling Factor S is equal to the K factor of the flowmeter expressed in pulses per unit volume The user configures the Scaling Factor and selects the timebase during the Configuration procedure Model 302di HP 295 12 Operation 3 5 Total Conversion The Total Conversion Factor enables the RATE to be displayed in one engineering unit e g gallons minute and the TOTALS to be displayed in another engineering unit e g barrels The Total Conversion Factor is a division factor which can be used to convert the totals to the different unit The Total Conv
29. t Circuit Model 302di HP 295 Flowmeter Input 27 1 MAG Coil Link Settings COIL PULS E COIL PULS E w AOO 88800 n O m O u gt BEBO O DBL DBH DBL DBH Use shielded i 7 0 O sun cable NPS NPS 825R input impedance Very high input recommended impedance 2 Redi Pulse Pick up Pulse output N M4 V 9 28 Vdc al Link Settings I COIL PULS E 1 w OO BEBO 8 DBL DBH Lk3 O sun NPS 7 Note dt a 4 20mA output is installed the supply to the Redi Pulse must be isolated 3 Pick up Open Collector with 15pA internal pullup current A Link Settings V 12 28 Vdc 5 COIL PULS E i w 072 w ONTO 8 DBL DBH 103 O NPS 7 Note ra 4 20mA output is installed the supply to the Redi Pulse must be isolated Model 302di HP 295 28 Flowmeter Input 4 Squarewave CMOS or Pulse Link Settings al w OO MS Lk2 Y 7 DBL DBH Common NPS Switching threshold voltage 1 3 voltsl Nu 5 Open Collector with 15pA 150pA internal pullup current M Link Settings 7 2 8 COIL PULSE i p w O C O 04 DBL DBH u3 O smi NPS N x 6 Reed Switch Battery Powered with 15pA internal pullup current 2 DO Link Settings ds PULSE A s m O O GG Y w O QAI DBL DBH u Lk3 O NPS Note For a switch
30. the first or above the last frequency the scaling factor will maintain a constant value Note Display update time increases to 1 second if the non linearity correction feature is used with the battery powered version of this instrument Model 302di HP 295 14 Configuring 4 CONFIGURING The Model 302d is fully configurable with all parameters being stored in non volatile memory The Program Mode can be entered in one of two ways 1 By removing the lower cover strip i e the dark gray strip along the bottom of the enclosure flipping it end for end and replacing it on the enclosure This brings a small magnet on the inside of the cover strip in contact with a reed switch inside the instrument The PROGRAM key is then pressed to enter the Configuration Mode 2 By removing the front section of the enclosure which contains the main processor board and batteries Once removed the PROGRAM key is pressed to enter the Configuration Mode 5 key is used to step through the program CAL ACCUM RESET ences and the J and keys on the front panel are used to change and increment the flashing digits Note that only flashing digits may be changed Up to nineteen CAL steps are accessible depending on which options are installed The CAL number is displayed on the lower display and the parameter is displayed on the upper display Model 302di HP 295 Configuring 15 4 1 Configuration Steps Step CALO CALI CAL 2
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