205D-L MAN_Nov02.DOC - Hoffer Flow Controls, Inc
Contents
1. 57 INPUT COMPARATOR 1K 100K Pulse Input Channel 1 x t 81 si 2K4 gt 5 100R WF 45V Common a 33K Channels 1 amp 2 CE TREE 82 S5 S4 S6 33K IK2 2K 5V I I i 10K INPUT COMPARATOR Pulse Input IK Chanal 2 t 81 100K di 100R 91 45V 33K 86 33K 1K2 The Frequency Input Circuit Model 205D L HP 299 58 Input Circuits 1 MAG Coil 24 Vdc Channel 2 3 Redi Pulse Open Collector 24 Vdc D c Q lt Channel 2 Model 205D L oo o on E MEI 1 8 e g millivolt signal from a turbine flowmeter on L EEEE HHH 1 8 on it H H 1 8 HP 299 4 Squarewave CMOS or Pulse Channel 1 P scu Common iG Channel 2 SEA foo 5 Open Collector iM Channel 1 Common LA Channel 2 2 6 Reed Switch Channel 1 K ue Co 2 Channel 2 Model 205D L Input Circuits 59 on I EHEHE HEH 1 8 3 e g vortex pre amplifiers or magnetic flowmeters on 1 8 e g preamplifiers and opto sensors on il 9 HEHE H 1 82. a asssssssssssss 49 6 3 Checking the Input Signal see 52 7 Input Circuits 54 T Flow Inputs eec eer eek 54 7 1 1 Frequency Inputs essere 54 7 1 2 Analog Flow 60 7 2 Temperature or Density Input esee 61 8 Installation 63 8 1 General tonne nU RO Aint t reus 63 8 2 Terminal Wiring Designations eeeeeee 65 9 Trouble Shooting 66 9 Error Codes ete bie utes 66 Model 205D L HP 299 Introduction 1 1 Introduction The Model 205D L Flow Computers use temperature correction to calculate the volumetric flow for liquids at standard reference conditions This manual covers the Model 205D L series which accepts most frequency and pulse signals including mV outputs from turbine flowmeters and two wire proximity switch outputs The instrument is fully configurable with all calculation constants set via the front panel switches and stored permanently in a non volatile memory Mass flow can also be calculated from the temperature input and the volumetric flow input Therefore the Model 205D L series Flow Computer will enable relatively low cost mass flow measurement using positive displacement or turbine flowmeters and an RTD The Model 205D L is ideally suited to custody transfer applications and includes the API ASTM equations covering general petroleum products and LPG Quadrature signal inputs are provided where it is required to e
3. Three Wire Transmission External Supply Model 205D L HP 299 Options 35 5 2 The RS232 422 485 Interface Option With this option installed the circuits for both the RS232 and RS422 485 interfaces are provided as standard They can be used to interface to both printers and computers A number of standard printer protocols are built into the instrument 5 2 1 Hardware The following diagram provides overview of the RS232 RS422 RS485 communications hardware All three interfaces are available on the rear terminal strips and the user can select either one by making the appropriate connections The RS232 interface is primarily used with printers or for simple communication with a computer over a short distance The RS422 and RS485 interfaces are used for communication over a long distance or in applications requiring multipoint communication 24 gt 0 RS422 Out 9 2 5 26 K lt RS422 In 25 Q lt O 21 Dataln RS232 p 22 Data Out L 9 27 CTS B 20 Ground PS Model 205D L HP 299 36 Options 52 Multipoint Communication Multipoint Communication is a system whereby a number of instruments can be addressed over a dual twisted pair interface Up to 32 instruments can be connected to a common bus using the RS422 and RS485 interfaces as shown below To convert the RS422 interface to an RS485 interface the RS422 Data In Terminal must be connected to the RS422 Dat
4. e g positive displacement flowmeters with reed switch outputs HP 299 60 Input Circuits 7 1 2 Analog Flow Input On instruments with the LA option there is provision to accept an analog 4 20mA input from a flowmeter When the analog input is selected the pulse inputs cannot be used The flowmeter and temperature or density sensor are connected as follows MODEL 205D LA Flow T itt DUET Set Supply Out gl to 24 Volts 4 20 4 20 mA Temperature Transmitter Shielding When shielding the input signals the shield should be connected to the case earth and not connected at the transmitter end i e ground at the instrument end only Model 205D L HP 299 Input Circuits 61 7 22 Temperature or Density Input The Model 205D Flow Computer can be supplied with the following optional temperature density inputs LRoption Direct 4 wire Platinum RTD PT100 LA option 4 20mA input which can be used for temperature or density RTD Four wire RTD measurement is the most accurate form of measurement and can be used for measurements with the RTD up to 300 feet from the instrument It is recommended to use shielded cable when interfacing to the RTD A two or three wire RTD can be used in place of the 4 wire RTD but 4 wires must be taken to the RTD and the signal and current wires joined as close to the RTD as possible With direct RTD measurement the program
5. CORRCT Select either a linear input or non linear 3 2 1 correction for the flowmeter input If an analog input is selected the input relationship is either linear or square root Linear Linear Correction Nonlin Non Linear Correction only on freq input 3 5 Sq rt Square Root Input only if analog input 3 3 2 Model 205D L HP 299 44 Configuration Step Display Description Text Ref 5 SCALE Scaling Factor If linear correction is selected the scaling factor is programmed as follows Fact Enter the Scaling factor K factor of the 3 3 flowmeter If non linearity correction is to be programmed up to 10 frequencies and scaling factors can be entered Freq1 Freql is programmed to the first frequency 3 5 point in the range of 0 to 9999Hz Fact This is the K factor of the flowmeter i e pulses per gal etc at Freq1 The digits before the decimal point whole numbers are programmed first followed by the decimals The scaling factor can be programmed in the range of 0 1000 to 50 000 Freq2 Freq2 is programmed to the second frequency point If any Freq is set to 0 no further correction points can be programmed and the non linearity correction is limited to that number of points Fact2 Scaling Factor 2 to Fact 10 Scaling Factor 10 Note that Freq10 is not displayed since it must always be zero If an Analog input is programmed the value S is entered Fact This is the value S which must be entered 6 CUTOFF
6. 0 600 kg litre The temperature compensation is performed over a temperature range of 45 C to 60 C 49 F to 140 F Model 205D L HP 299 30 Temperature Compensation 4 6 Density Meter Input Density correction is available on the Model 205D LA where a density meter is connected across the temperature inputs Terminal 5 in place of a temperature transmitter The densitometer must have a 4 20mA output During Calibration the density at 4mA and 20mA can be programmed and the mass flow for volumetric flowmeters is Mass Flow R x Density where R is the flowrate defined in sections 3 3 1 and 3 3 2 Density is the density input If the input falls below 3 5mA an error status Err 12 is displayed Differential Pressure Devices For differential pressure devices the Mass flowrate is defined as Mass Flow S x A x Density Mass Flowrateat 20mA o 1 2 Density at reference conditions where S The Mass flowrate at 20mA and the corresponding reference density are provided by the flowmeter supplier and S is then calculated from the above equation and programmed during Calibration For differential pressure devices the Gross Total is calculated as 1 Volume Flow S x A x 7 Density Model 205D L HP 299 5 Options 5 1 The 4 20mA Output Option Options 31 The 4 20mA output option provides an analog output of RATE as either a 4 20mA current or a 0 10 Volt level All output signals are
7. Displayed only if an analog input is selected XXX The Cutoff prevents display and integration of the flowrate below x xx of the span 7 FdPt Number of decimal points which the Rate is to be displayed between 0 to 0 00000 Model 205D L HP 299 Step 11 12 Display t base 60secs hours days Secs FILTER 1 to 99 TOTCON X XXXX t dPt A dPt t c none genliq gendns petrol LPG dens Model 205D L Configuration 45 Description Text Ref The Timebase which the Rate is calculated 3 3 must be entered as units min units hour units day units second The filter constant for filtering the Rate 3 3 3 display No filtering Very heavy filtering A division factor to convert the totals to 3 4 different units from those used for rate e g gallons min and barrels Rate and Totals have the same engineering units Other factors can be programmed between 0 01 and 2000 Number of decimal points which the Net resettable Total is displayed between 0 to 0 000 Number of decimal points which the Accumulated non resettable total is displayed between 0 to 0 000 The type of Temperature Compensation canbe 4 selected as follows No temperature compensation Volume Correction for General liquids 4 2 Density Correction for general liquids 4 3 Compensation for Petroleum products 4 4 Compensation for Liquid Petroleum Gas 4 5 Density Meter Input LA Option only 4 6 HP 299 46 Step C
8. Model 205D L HP 299 28 Temperature Compensation Product Group Relative Density Density kg m Crude Oil 0 751 1 000 750 1000 Jet Fuels Kerosene Solvent 0 751 0 850 750 850 Gasoline 0 641 0 800 640 800 Lube Oil 0 851 0 960 850 960 Diesel Heating Fuel Oils 0 801 1 100 800 1100 When programming the density the values must be entered within these specified limits otherwise an error message will be displayed prompting the operator to check the parameters Model 205D L HP 299 Temperature Compensation 29 4 5 Compensation for Liquefied Petroleum Gas LPG The LPG correction program uses the American Petroleum Institute tables to volume correct the LPG to a reference temperature of 60 F for US units and 15 C for Metric units The program uses an internally stored table to correct to the following standards US units API Table 34 for correction of volume to 60 F against relative density 60 60 F for liquefied petroleum gases Metric units API Table 54 for Reduction of Volume to 15 C against density at 15 C for liquefied petroleum gases For US units the density is programmed as the Relative Density SG and the volume is referenced to 60 F For Metric units the density is entered as kg litre and the volume is referenced to 15 C When programming the density the values must be within the following limits otherwise an error message will be displayed US units 0 501 to 0 600 Metric units 0 500 to
9. applications it is a requirement that the flowmeter has two outputs so that the integrity of the signal can be assured This usually requires a turbine meter to have two coils or a positive displacement meter to have two pulse units The Model 205D L models can interface to flowmeters fitted with two sensors and connections to the flowmeters are outlined in Section 7 1 1 The quadrature input has two functions 1 To detect a difference in the number of pulses from each input during delivery The instrument will alarm if the pulse difference since reset exceeds 1 in 1000 pulses When an alarm condition exists the totals will cease counting and will freeze at the last total prior to the alarm On detection of the alarm condition the alarm output on terminal 7 will go low energise and the display will cease counting The output can be used to shutoff the flow or to warn the operator The display will also periodically flash the error message ERR 13 The alarm condition is reset by pressing the DISPLAY key Bi directional Flow The 205D L models have the ability to detect forward and reverse flow The inputs must be connected with channel 1 being the 90 flow signal and channel 2 being the 0 signal For forward reverse detection to function correctly there must be clear definition of the input signals Model 205D L HP 299 12 Operation 3 3 Calculation of Rate and Total 3 3 1 Frequency Input The flowrate R is cal
10. automatically corrects for the non linearity in the RTD MODEL 205D LR RTD Temperature Sensor Twisted Pair Cable Shield to case earth Model 205D L HP 299 62 Input Circuits When wiring the RTD care must be taken to ensure the of the current on terminal 4 is connected to the same side of the RTD as the of the signal on terminal 5 The RTD has no polarity and can be connected in either direction 4 20mA This input can function as either a temperature or density input The instrument enables the 4mA and the 20mA points to be programmed Unlike the direct RTD measurement no correction is made for the non linearity of the temperature or density sensor MODEL 205D LA Set Supply Out to 24 Volts Temperature Transmitter Model 205D L HP 299 Input Circuits 62A This page intentionally left blank Model 205D L HP 299 Installation 63 S Installation 8 1 General Terminal designations for the Model 205D L Flow Computer are given on the following pages The cutout hole in the panel should be 5 5 139mm wide x 2 6 67mm high Two side clips are supplied to secure the instrument into the panel A case grounding point is provided via a ground lug on the side of the case Note that this grounding point is for the case only and there is complete electrical isolation between this point and all electronic circuits For EMC purposes or when the instrument is
11. circuits can be configured by the user to interface with most flowmeters A small 8 position DIP switch on the rear of the instrument is used to configure the input for different signal types Model 205D L HP 299 Input Circuits 55 Switch Settings The following switch settings are recommended for different input signal types Note Input types d and e are only available on Channel 1 Channel 2 is limited to signal types a to c Input Signal Type Input Terminals Switch Settings a Logic Signal CMOS Pulse b Open Collector or Reed switch c Namur Proximity set DC out to 8 volts d Switch or Reed Switch with debounce circuit 200Hz max Coil 20mV P P minimum General Specification Switching Threshold 2 5 Volts except for input type c and e Maximum Input Voltage 50 peak Input Impedance Inputtype a 100K on Channel 1 10K on Channel 2 Input types b amp d 10K Input type c 1K Input type e 100K Model 205D L HP 299 56 Input Circuits Powering of Sensors The 205D Series has a regulated power supply output which can be used to power sensors A trimpot on the rear of the instrument allows the voltage to be adjusted in the range of 8 24 volts and the output can supply a maximum of 50mA Model 205D L HP 299 Input Circuits 57
12. electrically isolated from the instrument power supply and signal inputs to ensure minimum interference The 4 20mA is directly proportional to the displayed rate Either 2 wire current transmission is available with the loop powered internally or 3 wire transmission from an external loop supply A block diagram of the output is shown below and various methods of interconnection are outlined on the following pages DC to DC Convertor Digital to NZ Analog Convertor Terminal 15V lt 26 U O 25 a 3024 0 10V Out Opto Isolation Model 205D L Amplifiers O 22 ov lt 0 21 12V 4 0 23 HP 299 32 Options 5 1 1 Load Specification Maximum load which the output can drive Internally powered loop 500 ohms Externally powered R V 5 0 02 Where V is the external loop voltage R is the maximum load in ohms Output impedance of 0 10 Volt source 100 ohms 5 1 2 Calculation Parameters relating to this option are configured when calibrating the instrument see Section 5 and provide for Defining the rate which is equivalent to 4mA or 0 volts Defining the rate which is equivalent to 20mA or 10 volts Selecting the output range as 4 20mA which also gives 2 10 volts on the voltage output circuit or as 0 10 volts which gives 0 20mA on the current output circuit By being independently able to set the output range the instrume
13. 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 2 3 Introduction 1 1 1 Model Number Designation eee 3 Specification 4 Operation 7 3 1 Front Panel Operation essere 9 3 2 Single and Quadrature Inputs esee 11 3 3 Calculation of Rate and Total sse 12 3 3 1 Frequency 12 3 3 2 Analog Input 2 se repere A 13 33 3 Piltering isis niet eed A a 14 3 4 Total Con
14. the Model 205D LA will only handle flow signals from differential pressure type flow devices 1 when n 1 2 for 1 No temperature compensation 2 Density Correction for general liquids 3 Adensity meter input A cutoff can also be set for analog inputs which prevents the display of flowrate and integration of the input signal at low flowrates The cutoff is set as a percentage of the Span S Note that when the input signal drops below 3 5mA a signal error will occur The instrument will beep and the display will alternate between the current total and the word SIGNAL Model 205D L HP 299 14 Operation 33 3 Filtering Frequency fluctuations caused by pulsating flow through a flowmeter often makes the Rate impossible to read with any precision The Flow Computer has a digital filter which will average out these fluctuations and enable the Rate to be read to four digit accuracy The degree of filtering is fully configurable which means that highly accurate and stable readings can be obtained without excessive lag When the Rate is retransmitted via the 4 20mA output the filtering will also average out any fluctuations on the output 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 input The v
15. the instrument After this period the clock may need to be reset The baud rate parity and word length can be selected during configuration and the user must ensure that these correspond to the setting on the printer or computer with which the instrument is communicating The software protocols can be selected during configuration to provide standard interfaces to a number of printers and computers Since other interfaces will continue to be added the user should consult the factory for the latest protocols and or printer drivers Printer A ticket is printed each time the RESET key is pressed The instrument prints the ticket before resetting the resettable total Protocols are provided to drive the following printers 1 Standard Computer Printer Note that the printer must have an RS232 Serial Interface EPSON CTM290 Slip Printer Contrec Model 624 EPSON TM290 2 Slip Printer Contrec Model 632 2 Syntest SP 210 eN tA Consult with the factory if any other printer is to be interfaced with the instrument The tickets can also be printed with a number of different units of measure including liters and gallons The units of measure are selectable from a pre programmed list A CTS input is provided and prevents the instrument from transmitting any further characters to a printer if the printer buffer is full The CTS input is usually connected to the Data Buffer Full output from the printer Model 205D L HP 299
16. 5 volts 60mA typical current no options AC 95 135 VAC or 190 260 VAC Set internally at factory 0 C to 55 C standard Dimensions 5 7 144mm wide x 2 8 72mm high x 7 0 178mm deep Cutout 5 5 139mm wide x 2 6 67mm high Frequency Input Frequency Range Minimum 0 25Hz on Rate Input Circuits Scaling Range Non Linear Correction RTD Input LR Option OHz on Total Maximum 1OKHZz single input 2 5KHz quadrature input See Section 6 1 0 1000 to 50 000 Up to 10 corrections points Temperature 100 C 148 F to 200 C 392 F Measurement Range Measurement 0 1 C Accuracy RTD Type Platinum PT100 Linearity Correction Model 205D L Internally Compensated HP 299 Specification 5 4 20mA Inputs LA Option Measured Flow temperature or density Input Impedance 250 ohms Measurement 0 05 Accuracy Isolation Inputs are not isolated Relay Outputs Maximum Switching Power 1250VA Maximum Switching Voltage 250V AC 30VDC Maximum Switching Current 5 Amps 4 20mA Output Resolution 10 bits Accuracy Better than 0 05 Maximum Load 500 ohms internally powered 950 ohms from 24VDC Isolation Output is isolated Pulse Output Pulse Width 10msec negative going pulse Maximum Duty Cycle 49 pulses per second Output Open collector transistor will sink 100mA Scaling The pulse output is scaled and outputs one pulse each time the accumulated total increments Non linearity Cor
17. All parameters and constants are stored in a non volatile memory which retains data without battery backup for a minimum of 10 years A block diagram of the two input options of the instrument is shown below LR Option e Temperature Input directly from a PT100 RTD e Frequency Input from a single flowmeter with a single or dual frequency output The dual frequency unit termed Quadrature is often required in custody transfer applications to ensure the integrity of the flow signal and to measure bi directional flow 4 20 Pulse Input 1 4 20 mA Chamell P Option Output Signal s Dua tee Common RS232 422 RS232 422 Option gt Output Pulse Input 2 LL 1 gt bee re Channel 2 Relay gt High amp Low Option Relay Output RTD 100 gt Pulse T Output 2 Model 205D LR gt Flow Alarm i DC Input Power 110 220V gt DC Power Ground AC Mains gt DC Power to sensors Model 205D L HP 299 8 Operation LA Option e Temperature Input from a temperature transmitter 4 20mA e Either a Frequency Input Single or Quadrature or Analog 4 20mA from a single flowmeter 420 mA Pulse Input I 4 20 mA Channel 1 gt Option Output Signal gt BORNE SS Common RS232 422 RS232 422 Option s Output Pulse Input S11 y RENS Channel 2 Relay High amp Low Option Relay Output Analog Flow Input gt ma Temperatur
18. Bass Strait Benzene Toluene Xylene White Spirit Mineral Turpentine Lube Oils SAE 10 SAE 20 SAE 30 SAE 40 SAE 50 Water Model 205D L DENSITY AT 15 kg litre 0 510 0 580 0 695 0 740 0 795 0 790 0 810 0 820 0 840 0 855 0 980 0 900 1 020 0 796 0 880 0 870 0 860 0 780 0 820 0 880 0 890 0 890 0 900 0 900 1 000 COEFFICIENT OF EXPANSION C 0 00290 0 00200 0 00120 0 00110 0 00094 0 00094 0 00087 0 00087 0 00084 0 00082 0 00070 0 00075 0 00063 0 00087 0 00120 0 00110 0 00100 0 00095 0 00087 0 00077 0 00076 0 00076 0 00074 0 00074 0 0003 1 HP 299 Temperature Compensation 25 4 3 Density Correction for General Liquids If density correction for general liquids is selected a five point temperature density table can be programmed The instrument uses this table to determine the density of the product after measuring the temperature of the fluid For known fluids the temperature density characteristics are well documented in standard chemical reference books One to five correction points can be programmed and the user inputs the number of points during programming The instrument will also allow a constant density value to be programmed by selecting only one correction point In this case the temperature input is ignored This feature is useful if the temperature sensor is removed for maintenance 4 3 1 Volumetric Flowmeters The flow equation for volumetric flowmeter
19. CSA amp SAA APPROVED Eexd11BT6 EX UL CSA EXPLOSION PROOF ENCLOSURE OPTIONS MODEL 205D ME OPTION H 50 W HEATER SPECIFY 12 VDC 115 VAC OR 220 VAC B BACKLIGHTING DISPLAY CONFORMAL COATING CE INTERFERENCE CE COMPLIANCE NTEP WEIGHTS amp MEASURES CUSTODY TRANSFER UL ELECTRICAL ETL US APPROVED TO UL508 amp CSA CEN CENELEC CSA NRTL C AND SAA APPROVAL SEE NOTE 7 NOTES 1l LCD DISPLAY 6 DIGIT 0 7 17 8MM HIGH NON VOLATILE TO TEN YEARS 2 TRANSDUCER SUPPLY 8 24 VDC 50 MA MAX FIELD ADJUSTABLE 3 10 POINT LINEARIZATION WITH INPUT OPTIONS LA LR AND Q THE Q OPTION CAN BE CONFIGURED WITH EITHER THE LA OR LR OPTION SINGLE POINT K FACTOR WITH INPUT OPTIONS 1 AND S 4 BOTHMAGNETIC COIL AND HALL EFFECT INPUTS ACCEPTED 5 HI LO ALARMS TWO SPDT SWITCHING CURRENT MAX 5 AMS 250 VAC OR 30 VDC MAX SWITCHING POWER TEMPERATURE RANGE 6 LR RTDINPUT 0 eese 148 TO 392 DEG F LA 4 20 MA INPUT GENERAL LIQUIDS 459 TO 392 DEG F PETROLEUMS 148 TO 392 DEG F EPG tee M cet Ce ey 49 TO 140 DEG F 7 AVAILABLE WITH LA AND LR OPTIONS ONLY Model 205D L HP 299 4 Specification 2 Specification General Display 6 digit LCD 0 7 17 8mm high digits Display Update Rate 0 25 seconds Transducer Supply 8 24VDC field adjustable Power Requirements Operating Temperature 50mA maximum DC 11 5 to 28
20. D L HP 299 64 Installation 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 Although it is also possible to connect shields to the signal ground terminal 2 this practice is not in accordance with EMC directives RC Networks for Interference Suppression When driving highly inductive loads with the control relays it is recommended that RC suppression networks often called Snubbers are used for two reasons To limit the amount of electrical noise caused by arcing across the relay contacts which may in extreme cases cause the microprocessor to act erratically To protect the relay contacts against premature wear through pitting RC suppression networks consist of a capacitor and series resistor and are commonly available in the electrical industry The values of R and C are dependant entirely on the load However if the user is unsure of the type of snubber to use values of 0 25uF and 100 ohms will usually suffice Note that only AC voltage approved RC suppression networks should be used The basic principle of operation is that the capacitor prevents a series of sparks from arcing across the contact as the contact breaks The series resistor limits the current through the contact when the contact first makes Model 205D L HP 299 Installation 65 8 2 Terminal Wiring Designations Termi
21. H 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 product is d
22. HP 299 Configuration 6 2 Configuring Options Step Display Description 1 OPTION Options if installed TEST Check Input Signals Exit to normal operation CAL Setup Program Parameters If the 4 20mA option is installed the following will be displayed 2 OUTPUT Select output option 4 20 4 20mA also 2 10 volts 0 10 0 10 volt also 0 20mA 3 OP 4 Flowrate at 4mA or 0 volt XXXX 4 OP20 Flowrate at 20mA or 10 volt XXXX 49 Text Ref 6 2 6 1 5 1 If the RS232 422 485 option is installed the following will be displayed 5 DF Date Format Eur European i e days months years USA USA 1 months days years 6 Date Enter date as XX XX XX Years Months Days 7 HOUR Enter time as a 24 hour clock XX XX Hours Minutes 8 BAUD Baudrate XXXX 300 600 1200 2400 4800 or 9600 9 DATA Word length 7 7 bits 8 8 bits 5 2 5 2 Model 205D L HP 299 50 Configuration Step Display Description Text Ref 10 PARITY Parity NP No Parity OP Odd Parity EP Even Parity 11 SIGNAL Signal Type rs232 RS232 rs422 RS422 RS485 12 IDNO Unitldentification Number 0 None 1 99 Id Number 13 xx Printer Computer Type 00 Standard Computer Printer 01 EPSON CTM 290 Slip Printer 02 Contrec Model 624 Printer 05 EPSON TM290 2 Slip Printer 04 Contrec Model 632 2 Printer 05 Syntest SP 210 Printer 20 Computer If a Printer Protocol is selected the following message is displayed 14 UN
23. IT xx Units of measurement printed 00 None 01 Liters Ltrs 02 Gallons Gals 03 Barrels bbls 04 Pounds 165 05 Grams gms 06 Kilograms kgs 07 Tons tons Model 205D L HP 299 Configuration 51 Step Display Description Text Ref If a Computer Protocol is selected the following message is displayed 14 ECHO ECHO Commands On Echo Full Duplex Off No Echo Half Duplex If the relay option is installed the following is displayed 15 AL Hi High Alarm switch point 5 3 XXXXXX The high relay energizes when the flowrate exceeds this value 16 AL Lo Low Alarm switch point 5 3 XXXXXX The low relay energizes when the flowrate fall below this value Model 205D L HP 299 52 6 3 Step 1 Configuration Checking the Input Signal Display Description Text Ref TEST Check Input Signals Exit to normal operation CAL Setup Program Parameters 6 1 OPTION Options if installed 6 2 The following steps are displayed when TEST is selected Srx xx Software revision number If the instrument has the LA option is installed and temperature or density correction selected the display will show T4 20 Displayed for 1 second to indicate input from the 4 20mA temperature input Or D4 20 XX XX Input current displayed If the instrument has the LR option is installed and temperature correction selected the display will show RTD Displayed for 1 second to indicate the RTD XXX XX Measured t
24. Immunity Standard EN 50082 2 Industrial Environment In order to comply with these standards the wiring instructions in Section 8 must be followed Model 205D L HP 299 Introduction 3 1 1 Model Number Designation The Model number of an instrument describes which input and output options are installed and the AC voltage rating MODEL 205D DIGITAL FLOW COMPUTER TO BE USED ONLY WHEN APPROVALS ARE REQUI RED MODEL 205D A D CE INPUTS ANALOG amp COMMUNICATIONS POWER MOUNTING ENCLOSURES OPTIONS INPUTS SELECT ONLY ONE OPTION MODEL 205 C XC OPTION 1 BASIC UNIT SINGLE CHANNEL LA 4 20 MA TEMPERATURE LR RTD 4 WIRE LINEARIZED Q QUADRATURE BEDIRECTIONAL FLOW S ADD SUBTRACT TWO FLOW INPUTS SEE NOTE 3 ANALOG amp COMMUNICATIONS MODEL205D 5 FC X OPTION 0 NO OPTIONS OTHER THAN SCALED OPEN COLLECTOR STANDARD ALL OPTIONS 1 4 20 MA ISOLATED 2 RS232 422 485 3 HIGH LOW FLOW ALARMS 4 4 20 MA ISOLATED amp HIGH LOW FLOW ALARMS 5 RS232 422 485 amp HIGH LOW FLOW ALARMS POWER MODEL 205D C X OPTION A 95 135 VAC 50 60 HZ AND 11 5 28 5 VDC SELECT C 190 260 VAC 50 60 HZ Model 205D L HP 299 Introduction 3A MOUNTING ENCLOSURES MODEL 205 X OPTION 1 PANEL MOUNT STD 2 NEMA 4X WHITE FIBERGLASS 2B NEMA 4X ALUMINUM WITH HEAVY DUTY EXTERNAL SWITCHES CENELEC FLAME PROOF
25. MODEL 205D L Flow Computer USER S MANUAL HP 299 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 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 po 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 manual
26. Options 39 If the printer buffer is large enough to handle the message output from the instrument then this input need not be used and should be left unconnected Computer The instrument receives and transmits messages in ASCII with all command strings to the instrument terminated by a carriage return While replies from the instrument are terminated with a carriage return and a line feed Xon Xoff protocol is also supported and the instrument will automatically determine if the message sent by the host computer is preceded by an Xoff character If it does recognize an Xoff as the first character of a command string the instrument will automatically switch to the Xoff Xon protocol beginning and ending all messages with Xoff and Xon characters respectively Xoff Xon protocol is only available when the RS232 interface is selected During configuration the instrument can be configured to operate in a full duplex or half duplex transmission mode In full duplex mode all commands sent to the instrument are echoed back to the host computer In half duplex the commands are not echoed Model 205D L HP 299 40 Options 5 3 The Relay Output Option The Relay output option consists of two Form C relays which can be preset during configuration to energize when the rate or displayed value exceeds or drops below the preset values The low relay is energized whenever the rate is below the preset value and the high relay is energized wh
27. a Out Terminal and the RS422 Data In Terminal must be connected to the RS422 Data Out Terminal These connections will convert the RS422 4 wire interface to the RS485 2 wire interface as shown in Figure 2 Each instrument can be configured with a unique address which is used by the Master Controller e g an IBM PC to identify each instrument The Controller will send the address down the line and will alert the relevant instrument Subsequent software protocol will control the flow of data between the Controller and the Instrument Load 120 ohms Twisted Pair o4 Load Host 120 ohms Computer 4 O op kr s 200 Series 200 Series Instrument Instrument Figure 1 RS422 Interface Model 205D L HP 299 Options 37 Twisted Pair Host O P Computer 120 ohms TA Gnd Gnd In Out In Out 200 Series 200 Series Instrument Instrument Figure 2 RS485 Interface Model 205D L HP 299 38 Options 5 2 3 Communication Protocol The RS232 422 485 option has a real time clock and enables the time and date to be set and printed on tickets The date format can be European day month year or USA month day year while the time is on a 24 hour clock Note that the clock will only retain its time for 3 days minimum if there is no power connected to
28. alue A is the filter constant which is set during the configuration process The times for the display value to reach 90 and 99 of full swing are given in seconds for different values of A Model 205D L HP 299 Operation A 90 99 1 0 0 2 1 2 4 2 4 6 3 6 10 5 11 15 8 17 20 11 22 25 14 28 35 20 40 45 25 51 60 34 69 75 43 86 90 52 103 99 57 113 Table 1 Response to a step Input in seconds Note If A is set to 1 there is NO filtering of the input signal Model 205D L HP 299 16 Operation 3 4 Total Conversion The Total Conversion feature 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 Scaling Factor is always set in the unit relating to Rate and the Total Conversion constant is a division factor which can be used to convert the totals to the different unit The Total Conversion factor affects the net accumulated and gross totals and is limited between 0 01 and 2000 For Example If the Rate is required in gallons per minute 1 The Scaling Factor would be set to pulses per gallon 2 The timebase would be set to minutes If the Totals are required in barrels 3 The Total Conversion factor is set to 42 there are 42 gallons in a barrel All totals including the Batch Quantity and Batch Total will now be in barrels Some common units are given below together with the Total Con
29. connected to AC power source this point must be connected to a good earth ground using a multi stranded braided wire or strap All relay options are totally isolated from the case and from the internal circuitry A Supply Output Voltage is provided to power sensors This output will provide a regulated voltage of 8 to 24 volts and the voltage is adjustable by means of the potentiometer on the rear panel Maximum current is 50mA and the instrument comes with the voltage factory set at 24 Volts unless specified otherwise When the instrument is powered from a DC power source the maximum output voltage on the Supply Output is the DC Input Voltage less 3 5 volts The instrument will operate from either 12 28 volts DC or from the AC line The AC voltage is factory set to either 95 135 VAC 110 VAC nominal or 190 260 VAC 220 VAC nominal An internal AC transformer provides full isolation between the AC line and the electronic circuits The DC Ground terminal 12 provides a common ground for the 12 28 Volt power input the 8 24 Volt output and the pulse output It is good practice to use shielded cables for all signal connections to the instrument Care must be taken to separate signal cables from power cables so as to minimize interference Overall shields should be connected to the case earth at the instrument end only This connection should be as short as possible and connected to the grounding lug on the side of the case Model 205
30. ctory Error codes are displayed as Err and a list of the commonly encountered codes are given below Input Errors 11 12 13 14 SIGNAL Output Errors 21 22 23 Invalid input configuration programmed The Temperature or Density input is out of range Quadrature error detected i e unequal pulse count on the inputs Communications Input error RS232 422 485 interface Analog Flow input below 3 5mA LA option only Invalid output configuration Communications error Baud rate not set Communications error Printer fault Configuration Errors Model 205D L Zero Value not allowed Outside allowable Temperature range Outside allowable Density range Invalid Printer Type Invalid Volume Units selected HP 299
31. culated as follows xH gH S where f is the input frequency in Hz 15 the timebase of rate and is 1 for seconds 60 for minutes 3600 for hours and 86 400 for days S is the Scaling Factor The Scaling Factor S is equal to the K factor of the flowmeter expressed in pulses per unit volume The flowrate R as expressed in the above equation is the volumetric flowrate at flow conditions With temperature compensation the above flowrate R is corrected to give the flowrate at a base temperature or the mass flow Temperature Correction is covered in detail in Section 4 The user sets the Scaling Factor and selects the timebase during the configuration process as detailed in Section 5 of this manual When non linearity correction is configured up to 10 scaling factors are entered to cover different frequency ranges The instrument will then automatically select the correct scaling factor to be applied at the measured frequency Model 205D L HP 299 Operation 13 3 3 2 Analog Input With LA option where the analog input is selected rather than frequency the flowrate at flow conditions R is calculated as follows R A xS Where A represents the input signal O at 4mA and 1 at 20mA S is Span and is the flowrate at 20mA n is 1 for a linear input or 1 2 for inputs from differential pressure devices The user sets S and n during the configuration procedure as detailed in Section 6 of this manual Note that
32. e ren gt Model205D LA Flow Alarm L DC Input Power 110 220V DC Power Ground AC Mains gt DC Power to sensors With both options the LR and LA a DIL switch on the rear panel enables the frequency input circuit to be set to interface with a wide range of flowmeters Model 205D L HP 299 Operation 9 3 1 Front Panel Operation The display will normally show the Rate or Net Total as selected by the RATE or TOTAL keys on the front facia An LED in the key panel will light to indicate which function is currently displayed The DISPLAY key can be used to display the following additional information Accumulated Total On the first press of the DISPLAY key the display shows Acctot for one second followed by the actual total Temperature If temperature compensation is selected the second press of the DISPLAY key will show the product temperature as xxx x For xxx x C If a Density Meter input is selected rather than temperature the density and not temperature will be displayed The displays will read DENS for one second followed by the actual density value Gross Total If temperature compensation is selected the third press of the DISPLAY key will show GROSS for one second followed by the actual gross total If the DISPLAY key is again pressed the display will revert to the Rate or Total display In any display function if the DISPLAY key has not been pressed for 5 seconds the display will automat
33. e corrected 412 4 20mA A two wire 4 20mA input from a temperature transmitter or density meter can be input to instruments with the Model number designation 205D LA With a 4 20mA input a linear relationship is assumed over the span of the transmitter The temperatures or densities at 4mA and 20mA are both programmable during the Calibration routine Model 205D L HP 299 Temperature Compensation 23 42 Volume Correction for General Liquids For general liquids a linear correction factor can be applied to give volumetric flow at base conditions The flow equation is Volumetric Flowrate 1 r 7 xa Volume Corrected Flowrate where T is flow temperature C or F T is base temperature C or F a is Thermal Coefficient of Expansion per C or F The Volumetric Flowrate is the flowrate defined in sections 3 3 1 and 3 3 2 The Thermal Coefficient of Expansion for a liquid can determined empirically or can be found in chemical engineering texts A list of coefficients is given on the following page for a number of common petroleum products at 15 C Model 205D L HP 299 24 Temperature Compensation Thermal Coefficients of Expansion at 15 C 60 F PRODUCT LPG Propane Butane Aviation Gasoline Petrol Aviation Jet A 1 Lighting Kerosene Power Kerosene Heating Oil Automotive Distillate Industrial Diesel Fuel Fuel Oil High Sulphur Low Sulphur Bitumen Crude Oil
34. efective 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 to meet the
35. emperature displayed Use the DISPLAY switch to step to the Flow Input If the Flow Input is a Single frequency input the display will show Freq Displayed for 1 second followed by the actual frequency XXXX X Frequency in Hz Model 205D L HP 299 Configuration 53 Step Display Description Text Ref If the Flow Input is a Quadrature frequency input the display will show 4 Freq Displayed for 1 second followed by the actual frequency XXXX X Frequency in Hz If the flow is reversing a negative sign will appear If the Flow Input is an analog signal the display will show 4 F4 20 Displayed for 1 second followed by the actual current XX XX Current in mA If the RS232 422 485 option is installed the display will then show 5 CLOC Clock XX XX XX Time in Hours Mins Sec Model 205D L HP 299 Input Circuits 53 This page intentionally left blank Model 205D L HP 299 54 Input Circuits 7 Input Circuits 7 1 Flow Inputs 7 1 1 Frequency Inputs The 205D L unit has two pulse input circuits e Channel 1 is used with both single and quadrature input The input will interface directly to Turbine Flowmeters Logic Signals Open Collector Outputs Reed Switches e Channel 2 is used only when a quadrature input is selected and becomes the 0 input while Channel 1 becomes the 90 input The channel can interface directly to Open Collector Outputs Logic Signals Reed Switches The frequency input
36. enever the rate exceeds the preset value The preset values are programmed during configuration as described in section 5 O 34 Relay 1 i O 45 Low Alarm _ O 36 O 31 Relay 2 lt High larm y 3 O 33 Model 205D L Normally Open Normally Closed Common Normally Open Normally Closed Common HP 299 Configuration 41 6 Configuration The Configuration process enables the Setup Parameters to be configured as well as enabling the input signals to be checked The configuration process can be entered in one of two ways 1 Byconnecting a wire link or switch to the rear terminal strip across terminals 1 and 2 2 By pressing the TOTAL key and while holding pressing the RESET key Both keys must then be held for approximately 6 seconds This second method of access can be disabled during the configuration so that it is only possible to enter the configuration process via the link across terminals 1 and 2 The key switch actions are during Configuration are as follows RATE changes a flashing digit to the next digit TOTAL increments a flashing digit or changes a parameter selection RESET resets a flashing digit to zero DISPLAY steps through the configuration sequences Note that the arrows in the RATE and TOTAL key switches indicate that these switches can be used to change and increment digits respectively In stepping through the configuration sequence the Parameter D
37. escription is always displayed first followed by the actual value or parameter When a value or parameter can be changed it is always shown as flashing and the LEDs in the switch panels are lit if that key switch can be used to change a value On first entering the Configuration routine the display will show CAL Setup Program parameters Option Options if installed Test Check Input Signals Model 205D L HP 299 42 Configuration End Exit to Normal Operation The user can toggle between these modes using the TOTAL key and by using the DISPLA Y key select the appropriate mode To exit Configuration step through the Setup program or Test program until the end and press the DISPLAY key when End is displayed ensure the configuration link is removed Model 205D L HP 299 Configuration 43 6 1 Configuring the Setup Parameters Step Display Description Text Ref 1 CAL Setup Program Parameters OPTION Options if installed 6 2 TEST Check Input Signals 6 3 Exit to normal operation The following steps are displayed when CAL is selected 2 RESTOT Reset all totals to zero XXXXXX To clear all totals net gross and accumulated press the RESET key once 3 FL INP Select either a single frequency input or a 3 2 quadrature input 1 two pulses from a single flowmeter The analog input on the LA option can also be selected single Single Input quad Quadrature Input analog Analog Input only with LA option 4
38. ically go back to the Rate or Total display Model 205D L HP 299 10 Operation The display functions are defined as follows RATE TOTAL ACCUMULATED GROSS TOTAL TEMPERATURE Rate of flow in engineering units with temperature correction if selected The Net resettable total The Net Total is temperature corrected if selected The Accumulated Total is a Net Total 1 temperature compensated but it is not resettable via the front RESET key The Gross Total is the total without temperature correction The Gross Total will be reset each time the RESET key is pressed The instantaneous temperature of the fluid being measured in C or F depending on which units are selected when the instrument was configured All values of rate and total will also be compensated for flowmeter non linearity if this function is selected On reaching the maximum displayed total all totals will roll over to Zero and continue totalizing If at any time power is lost or the instrument is switched off the totals will be stored in the non volatile memory When power is switched back on to the instrument the stored totals will be recalled from memory and the totals will be incremented from the last values Model 205D L HP 299 Operation 11 3 2 Single and Quadrature Inputs In most industrial flowmetering applications a frequency producing flowmeter has only a single output However in many custody transfer
39. ing on CC the units selected in Step 14 18 COEF A Enter the thermal coefficient of change a as a Hence if the coefficient of expansion is 0 0029 C enter the change as 0 29000 The program will now go to Step 20 Density Correction for General Liquids 17 NotP x Number of temperature density correction 4 3 points up to five If x is set to 1 a fixed density can be programmed i e the density is not dependent on the temperature 18 tpl Temperature point 1 19 dens Density 1 Up to 5 correction points can be entered Petroleums 17 Select the petroleum type 4 4 CRUDE Crude oils as per tables 24A amp 54A LUBE Lube oils as per tables 24D amp 54D OILS Fuel oils amp heating oils and diesel tables 24B amp 54B JET Jet fuels kerosenes and solvents tables 24B amp 54B GAS Gasolines and naphthenes tables 24B amp 54B Model 205D L HP 299 48 Configuration Step Display Description Text Ref 18 dn 60 F US units use Relative Density SG 4 4 or Metric units use the Density at 15 C in kg m3 dn 15 C The program will now go to Step 20 Liquid Petroleum Gas 17 dn 60 F US units use the Relative Density SG 4 5 Metric units use the Density in kg litre The program will now go to Step 20 20 ACCESS Enable access to configuration routine via the front keyboard only Front Enable access via front keyboard No Acc Disable access via front keyboard Model 205D L
40. ires the user to input a frequency and the Scaling Factor K factor of the flowmeter at up to 10 points on the curve Generally these points will correspond to those shown on the Certificate Model 205D L HP 299 18 Operation If any frequency is set to OHz Frequency 6 in the preceding example then the program will require no further correction points to be programmed Hence the user can program any number of correction points up to a maximum of 10 Note that if all 10 correction points are required then Frequency 10 will automatically be assigned the value of OHz Model 205D L HP 299 Operation 19 3 6 The Output Pulse and Flow Alarm An OUTPUT PULSE is available on terminal 10 for driving remote counters and produces a pulse each time the Accumulated Total increments by one digit For example if the Accumulated Total has a resolution of 0 01 gallons a pulse is produced each 0 01 gallons The pulse is a current sinking pulse of approximately 10msec produced by an open collector transistor and can sink up to 100mA The maximum pulse rate is limited to 49 pulses per second and the resolution on the Accumulated Total must be set so that the Accumulated Total increments at less than 49 counts per second Note that due to the uneven pulse output spacing on this output the pulse output cannot be used to drive rate indicators The FLOW ALARM uses an identical circuit to the Output Pulse and is on terminal 7 The Flow Alarm is u
41. l coefficient of expansion This method is useful for correction to a base volume over relatively small changes in temperature Correction for Petroleum Liquids to US and International standards for a wide range of petroleums to a base temperature of 60 F 15 C Correction for LPG to US and International standards to a base temperature of 60 F 15 C In addition the Model 205D LA will also accept a 4 20mA signal from a Density Meter in place of a temperature input and use this input to calculate MASS flow Model 205D L HP 299 22 Temperature Compensation 4 1 Temperature Input RTD OR 4 20mA The Model 205D is available with either a PT100 Platinum RTD input CLR or with a 4 20mA input CLA The input option must be specified when ordering The temperature inputs are continually checked to ensure that they are within the specified limits and an Input Error will be displayed as Err 12 if the 4 20mA input drops below 3 5mA or if the RTD resistance is outside the valid resistance ranges 411 RTD Input Instruments with RTD inputs are identified by the Model number 205D LR A four wire temperature measurement is used to give high accuracy and internally the software will compensate for the non linearity of the RTD Details of the installation are given in Section 7 2 During calibration a temperature adjust facility enables the temperature reading to be adjusted This allows for manufacturing tolerances on the RTD to b
42. nal Terminal Terminal Model 205D L 1 20 21 22 23 24 25 26 27 31 32 33 34 35 36 Model 205D LR Configuration Link Signal Ground Flow Pulse Input Channel 2 PT100 IG PT100 Signal PT100 Signal Flow Alarm Flow Common Flow Pulse Input Channel 1 Pulse Out DC Power Out 8 24 Vdc DC Ground DC Power Input PT100 I Analog Output Option Not Used 0 Volts 0 10 Volts 12 Volts IC IQ 15 Volts Not Used Relay Option Relay 2 Normally Open Relay 2 Normally Closed Relay 2 Common Relay 1 Normally Open Relay 1 Normally Closed Relay 1 Common Model 205D LA Configuration Link Signal Ground Flow Pulse Input Channel 2 Not Used Temperature Input 4 20mA Not Used Flow Alarm Flow Common Flow Pulse Input Channel 1 Pulse Out DC Power Out 8 24 Vdc DC Ground DC Power Input Flow Input 4 20mA RS232 422 485 Option RS232 Signal Ground RS232 Data in RS232 Data Out RS422 485 Data Out RS422 485 Data Out RS422 485 Data In RS422 485 Data In RS232 CTS HP 299 Installation 65A This page intentionally left blank Model 205D L HP 299 66 Trouble Shooting 9 Trouble Shooting 9 1 Error Codes The instrument has extensive self test facilities and will display an error code if it detects an invalid condition If the instrument displays an error code other than those listed below please contact the fa
43. nsure the integrity of the flow signal or to measure bi directional flow Two versions of the instrument are available the Model 205D LR with direct RTD input and the Model 205D LA with a 4 20mA temperature input Both offer the following temperature compensation 1 Density Correction A five point temperature density curve can be programmed and the MASS flow calculated 2 Volume Correction for General Liquids The thermal Coefficient of Expansion of the liquid can be programmed and a reference temperature defined for volume correction to that reference 3 Petroleums Volumetric correction to 15 C or 60 F for Crude Oils Jet Fuel and Gasoline as determined by API ASTM Table 54A 54B and 54D for metric units and Tables 24A 24B and 24D for US units Model 205D L HP 299 2 Introduction 4 Liquid Petroleum Gas Volumetric correction to 15 C or 60 C for LPG as determined by Tables 54 and 34 of the API ASTM standards In addition the Model 205D LA accepts a 4 20mA signal from a Density Meter and uses this input to calculate mass flow This instrument conforms 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 50081 2 Industrial Environment Generic Immunity Standard EN 50082 1 Residential Commercial amp Light Industry Environment Generic
44. nt can effectively be programmed to amplify the input signal In driving chart recorders for example this enables the output to zoom in on a particular operating area instead of having to display the full operating range of the transducer For example 4mA may be set as O gallons min and 20mA as 100 gallon min However the user could set 4mA as representing 100 gallons min and 20mA as representing 120 gallons min For rates or displayed values above and below the maximum and minimum values the output will remain at its 20mA or 4mA level respectively It should be noted that the output will be updated every 0 25 seconds in unison with the display and between updates the output value is constant Model 205D L HP 299 Options 33 Terminal 15V lt OC 26 25 IG I O 24 O 22 Amplifiers lt O 51 12V lt 23 n oOATO_ Link y Load Voltage Output Configurations Terminal T15V 4 0 26 0 10V Out O 22 Amplifiers lt 21 gt Link 25 I I s o ja Load 500 ohm maximum 12V lt O 23 Two Wire Transmission Internal Supply Model 205D L HP 299 34 Options Terminal 15V 4 0 26 925 5 i I 24 1 t 0 10V Ou O 22 Load E 23 gt 12 External Supply of 23 to 30 VDC
45. onfiguration Display Description Text Ref If none no temperature compensation is selected the program will go to Step 20 ACCESS 14 15 14 15 15 16 If a Density Meter Input is selected the following steps are displayed d4 The density at 4mA input is entered 4 6 d20 The density at 20mA input is entered The program will now go to Step 21 All other selections result in the following steps being displayed t Select either US units or metric units as the 4 basis of the temperature compensation F US units C Metric units If the instrument has a direct RTD input LR option the temperature can be adjusted offset to correct for the RTD tolerance ADJt Adjust the temperature displayed during test XX XX Input the offset The first digit is 0 for positive or for negative If the instrument has a 4 20mA temperature input LA option then the 4mA and 20mA points are entered IP4 Enter the temperature that corresponds to 4mA 4 1 in either F or C depending on the units selected in Step 14 IP20 Enter the temperature that corresponds to 20mA Model 205D L HP 299 Configuration 47 Step Display Description Text Ref Program steps 17 to 19 depend on which option for temperature compensation was selected in Step 13 and are individually described Volume Correction for General Liquids 17 REF F The base temperature for the compensation 4 2 Enter the temperature in F or C depend
46. rection Number of Points 10 maximum Correction between points Linear interpolation Model 205D L HP 299 6 Specification Temperature Correction Density Correction for General Liquids LPG Petroleums Volume Correction for General Liquids A five point temperature density table can be programmed Temperature Range 273 C 459 F to 200 392 F To APVASTM Tables 34 and 54 Accuracy 0 04 for metric 0 1296 for US Temperature Range 45 C 49 F to 60 140 F Correction to API ASTM Tables Crude Tables 24A and 54A Gas Jet Oils Tables 24B and 54B Lube Oil Tables 24D and 54D Accuracy 0 07596 Temperature Range 100 C 148 F to 200 C 392 F Correction to any base temperature using a constant thermal coefficient of expansion Accuracy 0 0596 Temperature Range 273 C 459 F to 200 392 F Density Meter Input LA Option only Model 205D L A density meter with 4 20mA output can be connected in place of a temperature sensor to provide a mass flow reading HP 299 6A Specification This page intentionally left blank Model 205D L HP 299 Operation 7 3 Operation The Model 205D L uses a low power CMOS microprocessor to perform all control functions and calculations The instrument is fully configurable with all operating parameters and calculation constants user settable See Section 5 entitled Configuration for information on configuring
47. 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 WA 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 PROPERTY AND INJURY TO OR DEAT
48. s is Mass Flow R x Density where R is the flowrate defined in sections 3 3 1 and 3 3 2 Density is the density determined from the temperature density table When programming the temperature density table the density can be programmed in any units but the units must be consistent with the flowrate R and the required units for MASS flow For example if R is in litres and the mass is required in kilograms then the density must obviously be programmed as kg litre Model 205D L HP 299 26 Temperature Compensation DENSITY tp4 tp3 tp2 tpl TEMP The above figure shows the temperature density points for a 4 point table Above tp4 the curve has the same gradient as between tp3 and tp4 and below tpl the curve has the same gradient as between 1 and tp2 4 3 2 Differential Pressure Devices For differential pressure devices the Mass flowrate is defined as Mass Flow S x A x Density Mass Flowrateat 20mA o 1 2 Density at reference conditions where S The Mass flowrate at 20mA and the corresponding reference density are provided by the flowmeter supplier and S is then calculated from the above equation and programmed during Calibration For differential pressure devices the Gross Total is calculated as 1 Volume Flow S x A x 7 Density Model 205D L HP 299 Temperature Compensation 27 4 4 Compensation for Petroleum Liquids The petroleum correction program uses the American Petrole
49. sed by the Quadrature Input if selected and will output an error signal if there is a difference between the input pulses as described in Section 3 2 If an analog flow input signal is selected the Flow Alarm output will activate if the flow signal falls below 3 5mA The Flow Alarm output will switch on 1 the signal goes low whenever an alarm condition exists The Alarm will switch off 1 the signal goes high when the alarm is reset by pressing the DISPLAY key Model 205D L HP 299 20 Operation Connection of the Output Pulse is as follows Relay or Impulse Counter P lt j e 5 6ohms Tx 33 Zener e df DC Supply DC Supply ll _ Out 8 24V External Load Resistor 10K R 10 Logic Input 5 6 ohms 7 33V Zener nje men N Driving a Logic Input such as a PLC or Electronic Counter Model 205D L HP 299 Temperature Compensation 21 4 Temperature Compensation Temperature compensation gives the instrument the capability to correct for changes in volume of the measured liquid with temperature There are four methods of compensation which can be selected 1 Density correction for general liquids with known temperature density characteristics A five point temperature density curve can be programmed and the MASS flow calculated Volume correction for general liquids using a therma
50. um Institute equations described in API Standard 2540 For US units the equations leading to Table 24A 24B and 24D are used and for metric units Table 54A 54B and 54D equations are used These Tables are entitled Table 24A Correction of Volume for Generalized Crude Oils to 60 F against Relative Density 60 60 F Table 24B Correction of Volume for Generalized Products to 60 F Against Relative Density 60 60 F Table 24D Correction of Volume for Generalized Lubricating Oils to 60 F against Relative Density 60 60 F Table 54A Correction of Volume for Generalized Crude Oils to 15 C against Density at 15 C Table 54B Correction of Volume for Generalized Products to 15 C Against Density at 15 C Table 54D Correction of Volume for Generalized Lubricating Oils to 15 C against Density at 15 C Based on the programmed density and the measured temperature the software derives a volume correction factor VCF The gross uncompensated rate is multiplied by the VCF to give the net compensated total For US units the density is programmed as the Relative Density SG and the volume is referenced to 60 F For Metric units the density is programmed as the Density in kg m3 and the volume is referenced to 15 C Five product groups are defined by the equations and during the Calibration routine the relevant product group must be selected The product groups and the relevant densities which can be programmed are as follows
51. version 16 3 5 Non Linearity Correction eese 17 3 6 The Output Pulse and Flow Alarm eese 19 Temperature Compensation 21 4 1 Temperature Input RTD OR 4 20mA eee 22 4 1 0 IRTDInpDuLt 25256u eneneesonmebeeeh snsEhe 22 4 12 4820 mA inser eem he 22 4 2 Volume Correction for General Liquids 23 4 3 Density Correction for General Liquids 25 4 3 1 Volumetric Flowmeters a 25 4 3 2 Differential Pressure Devices 26 4 4 Compensation for Petroleum Liquids esses 27 4 5 Compensation for Liquefied Petroleum Gas LPG 29 4 6 Density Meter Input n nsssssssssssssss 30 Options 31 5 1 The 4 20mA Output Option esee 31 5 1 1 Load Specification spises nesrin nres 32 5 1 2 Calculation annone ten 32 5 2 The RS232 422 485 Interface Option 35 3 2 Hardware ccs enero hende es 35 5 2 0 Multipoint Communication eene 36 5 2 3 Communication Protocol 38 5 3 The Relay Output Option esee 40 Model 205D L HP 299 6 Configuration 41 6 1 Configuring the Setup Parameters a 43 6 2 Configuring the Options
52. version constant TOTCON which should be set Rate Totals TOTCON Gallons US Barrels oil 42 00 Liters Kiloliters 1000 ml Liters 1000 Mgallons Acre feet 0 32587 Units per second minute hour or day The timebase is set separately during configuration Model 205D L HP 299 Operation 17 3 5 Non Linearity Correction Non linearity correction enables the instrument to correct for known non linearities in the flowmeter This feature is not selectable for analog flow inputs Up to 10 frequencies and scaling factors can be programmed Data on the flowmeter non linearity can usually be supplied by the flowmeter manufacturer in the form of a Calibration Certificate and is the result of individual tests on a flowmeter over a range of flowrates The Certificate will list a number of flowrates or frequencies with the measured K factor e g pulses per gallon or litre at each flowrate The following diagram graphs the change in scaling factor with frequency for a hypothetical flowmeter The heavy black line represents the actual scaling factor of the flowmeter while the light black line is the approximation used in the instrument Scaling Factor Fact 6 Frequency Freq Freq Freq Freq Freq Freq 4 6 5 4 3 2 1 KHz Linear Interpolation is used between points on the curve except for Factor 1 which maintains a constant value between Frequency 1 and the maximum input frequency During Calibration the program requ
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