Model Hit-2A Rate Indicator/Totalizer
Contents
1. 25 6 1 Operation 25 6 2 Maintenance 26 6 3 Error Messages 26 6 4 Analog Output Calibration 27 HP 306 7 _ ASSEMBLY DISASSEMBLY PROCEDURE 29 7 1 Nema Enclosure 29 7 2 Explosion Proof Enclosure 32 Appendix A Default Configuration 34 Appendix B Communications 36 Message Format And Timeout 36 Messages 38 HP 306 Introduction 1 1 INTRODUCTION The HIT 2A is a microprocessor based flow rate indicator and totalizer The instrument displays flowrate and a resettable total and is compatible with all Hoffer turbine flowmeters and the H O G series positive displacement flowmeters The instrument can accept a low level freguency signal a pulse signal or a contact closure on the input and provides a linearized rate indication and total The HIT 2A is fully configurable with K factors freguencies and timebase being configured via the front panel key switches or the RS232 communications port The c2. Loop Power with Redi Pulse Open Collector Output Reguires 3 Wire Installation Loop Power J AT U Loop LAM Load NANANA Installation 15 cH oj se Redi Pulse ojo 2 SIG a 4 5 6 92 1 Redi Pul o 6 66 ge Rect Els loo 2 2 SIG 310 410 5 6 HP 306 16 Installation TTL Redi Pulse with AC Power o o a Redi Pulse 2 12 16 SIG z leu JP2 2 E 2 10 ad 3o m 2 sia 25 5 2 7 6 2 O O HIT 2A a L AC DC Power Supply 2 N l GND rh Earth 4 2 Typical Output Connections Analog Output with DC Power Heater JP4 H Loop o 72 12 116 O 11 a Ee 2 6 Loop 3 eK 410 8 5 ol 7 6 Load HP 306 Installation 17 Analog Output with AC Power TB 2 a BH L AC DC 12
3. OPTIONS MODEL 2 __ D _ _ OPTION D L 20 POINT LINEARIZATION RR REMOTE RESET AL LOW ALARM OPTO ISOLATED OPEN COLLECTOR AH HIGH ALARM OPTO ISOLATED OPEN COLLECTOR HT HEATER REQUIRES DC POWER INPUT OPTION NOTE EITHER LOW OR HIGH ALARM IS AVAILABLE NOT BOTH MOUNTING MODEL 2 5 OPTION E F NEMA 4X STYLE 2 ENCLOSURE MOUNTED ON TURBINE MUST BE USED WITH X RISER TURBINE OPTION FHT 8 LONG TEMPERATURE RISER FOR NEMA 4X STYLE 2 ENCLOSURE MOUNTED ON TURBINE REQUIRED WHEN FLUID TEMPERATURES EXCEED 140 DEG F USED WITH X RISER TURBINE OPTION FX EXPLOSION PROOF STYLE 3 ENCLOSURES MOUNTED ON TURBINE MUST BE USED WITH X RISER TURBINE OPTION FXHT 8 LONG TEMPERATURE RISER FOR EXPLOSION PROOF STYLE 3 ENCLOSURES MOUNTED ON TURBINE REQUIRED WHEN TEMPERATURES EXCEEDS 140 DEG F USED WITH X RISER TURBINE OPTION NP NEMA 4X ENCLOSURE PIPE MOUNTING KIT 2 PIPE OR SMALLER SPECIFY IF PIPE IS VERTICAL OR HORIZINTAL SPECIAL FEATURES MODEL HIT 2A __ _ 1 1 OPTION F CE CE MARK REQUIRED FOR EUROPE SP ANY SPECIAL FEATURES THAT ARE NOT COVERED IN THE MODEL NUMBER USE A WRITTEN DESCRIPTION OF THE SP HP 306 Introduction 4 This page intentionally left blank HP 306 Specification 2 SPECIFICATIONS 2 1 2 2 General Display Total Total Units Rate Rate Units K f
4. Reed Switches _ Logic Signals _ Open Collector Outputs The input is protected for over voltage up to 50 volts The flowmeter input terminals 1 amp 2 must be configured for the selected signal type by appropriately setting the input selection jumpers found on the HIT 2A signal input board see following for jumper positions 4 1 Typical Input Connections MAG Coil amp Reed Switch Pickups O JP4 Pickup SIG 11 JP2 a o om Oo N a 510 SSSI HP 306 NANNAN 14 Installation TTL Redi Pulse Pick up with DC Power Reset Input O VPVPIVV HP 306 JP4 JP2 a i Se Redi Pulse o o 2 ION E olo i sie 4 5 k 6 JP4 JP2 an H Heater Option oo o oon ae wn a DC Power Supply 8 to 30 VDC Reset CONANA 5 DC Power Supply 8 to 30 VDC Loop Power with TTL Redi Pulse Reguires 3 Wire Installation Loop i R 2 1 gu 15 7 a U Loop DC o Power 2 2 1080 4 JP2
5. HP 306 Theory of Operation 11 3 1 6 _ Communications Interface The communication is provided through a RS232C interface to the Microcontroller The external terminal device provides the power for the RS232 interface The Communications Interface is used to configure and trouble shoot the device 3 1 7 Clearing Total The Total amount stored in HIT 2A memory can be cleared from the front panel program menu by external momentary switch wired to the reset input or by external magnet The magnet has to be brought close to top of the front panel 3 2 System Response Time The displayed Rate and Total are updated every two 2 seconds The analog output response time to reach steady state due to a change in the flow rate is also approximately two 2 seconds When flow stops the time for the analog output to return to 4 mA will be between 3 and 12 seconds depending on the Maximum Sample Time MST setting MST is adjusted using the NB DATA command where NB is a value between 1 and 80 The default MST setting is NB 1 Adjusting the MST is only recommended for low flow applications where the minimum input frequency is below 1 Hz HP 306 12 Theory of Operation This page intentionally left blank HP 306 Installation 13 4 INSTALLATION The HIT 2A has an input conditioning circuit which accepts signals from most freguency or pulse producing flowmeters The input will interface directly to Turbine Flowmeters
6. the old total value shall be set to 0 HP 306 Appendix 8 Communications 47 For example if the present total is 123 45 and the HIT 2A receives CL lt CR gt the present total is cleared set to 0 0000 the total in EEPROM is cleared and the old total value is 123 45 If the HIT 2A receives ST lt CR gt the HIT 2A echoes with the total 123 45 the old total value If the HIT 2A receives pulses to cause the present total to increment to 0 01 and then receives a ST lt CR gt the HIT 2A will echo 0 01 or the present total The unit mimics this behavior on the display with the Clear Total Menu and the Set total menu The reset total input magnet or terminal input acts the same as the receipt of a CL lt CR gt from the communications link HP 306
7. Disassembly Procedure After the cover is removed use a flathead screwdriver to remove four screws and washers from the panel HP 306 Assembly Disassembly Procedure 31 Battery Disconnect JP7 connector by pulling up Disconnect JP8 by pulling outwards Terminal Blocks for Field Wiring Remove four screws with a Flat head screw driver Two of the screws have washers and internal teeth washers Finally remove the PC board To re assemble the unit follow the instruction above in the reverse order HP 306 32 Assembly Disassembly Procedure 7 2 Explosion Proof Enclosure A WARNING To prevent ignition of hazardous atmospheres do not remove the cover unless the area is void of combustible gas and vapors Replace the batteries only with battery part number 100 2477 Follow the disassembly instruction below for accessing electronic terminal block replacing the battery or replacing the electronic PCB assembly Loosen set screw that secures cover in place Remove the enclosure cover by turning the cover counter clockwise Set Screw After the cover is removed use a flathead screwdriver to remove two screws and washers from the panel HP 306 Assembly Disassembly Procedure 33 Battery Disconnect JP7 connector by pulling up Disconnect JP8 Terminal Blocks for Field Wiring Remove two screws with a Flat head screw driver Finally remove the PC board To re ass
8. The HIT 2A consists of six functional blocks These functional blocks are the User Interface Preamplifier Microcontroller Loop Driver Pulse Flowm i and Alarm Output and Communications Interface Loop Driver 4 20 mA Opto isolated Outputs eter Input Preamp Microcontroller Pulse Output RS232 Communications Alarm Output Interface Interface IRDA 3 1 3 1 1 User Functional Blocks User Interface The User Interface consists of a custom LCD display with 4 push buttons OK P gt right arrow and up arrow and an optional external reset Using the buttons and the displayed information the user can enter setup parameters rate units pulses per unit of flow etc as well as setup information for the pulse output and 4 20mA output The optional external reset maybe used to reset the accumulated total to zero and clear the displayed accumulated total 3 1 2 Preamplifier The Preamplifier accepts the input from the flowmeter The Preamplifier applies amplification low pass filtering and wave shaping to the input signal The wave shaping function converts the signal into a square wave before sending it to the Microcontroller 3 1 3 Microcontroller The Microcontroller accepts the square wave output of the preamplifier and performs all of the calculations that are required to control th
9. be disposed of in HFC s discretion HFC does not warrant these goods to meet the reguirements 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 singly or in combination with other machines or apparatus This warranty shall not apply to any HFC goods 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 such goods THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER WARRANTIES EXPRESSED OR IMPLIED INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE HFC SHALL NOT BE LIABLE FOR ANY LOSS OR DAMAGE RESULTING DIRECTLY OR INDIRECTLY FROM THE USE OR LOSS OF USE OF THE GOODS WITHOUT LIMITING THE GENERALITY OF THE FOREGOING THIS EXCLUSION FROM LIABILITY EMBRACES THE PURCHASER S EXPENSES FOR DOWNTIME OR FOR MAKING UP DOWNTIME DAMAGES FOR WHICH THE PURCHASER MAY BE LIABLE TO OTHER PERSONS DAMAGES TO PROPERTY AND INJURY TO OR DEATH OF ANY PERSONS HFC NEITHER ASSUMES NOR AUTHORIZES ANY PERSON TO ASSUME FOR IT ANY OTHER LIABILITY IN CONNECTION WITH THE SALE OR USE OF HFC S GOODS AND THERE ARE NO ORAL AGREEMENTS OR WARRAN
10. i O Power 11 JP2 FH 2 N L Suppy 3 av 3 9 4 GND _ o b 25 5 Z Earth o r 6 O O Loop Customer Load DCS Alarm Output External power supply provides voltage and current suitable for user selected relay V Diode to protect against reverse voltages 54 iL O 12 1 11 JP2 Bal 2 o 10 3 2 9 4 2 8 5 V r 6 OV from external power supply O O HP 306 18 Installation Analog Output and TTL Redi pulse with AC Power O JP4 A L a 2 2 Redi Pulse 2 2 gale AC DC rie olo hee A N o Power AL a a g Sien 2 s GND o 7 6 Earth 8 O O Pulse Output Suitable pull up resistor 2700 Ohms O O 8 O o dhe Be 2 PB DCS ee 6 9 4 8 5 Pulse Input VS 7 6 HP 306 Installation 19 4 3 Communications Connections Communications with the HIT 2A using a terminal or a PC using the Windows configuration program reguires the use of the HOFFER HIT2A 301 Communications Cable The communication circuits of the HIT 2A are externally powered and the power for these circuits is supplied by the RS232 serial port of the computer terminal The serial port conf
11. software revision where YY is the major software revision and ZZ is the minor software revision HP 306 RT Appendix 8 Communications 45 Read Total TOTAL DATA DATA O to the following maximums 99999 999 if TD 3 999999 99 ifTD 2 9999999 9 ifTD 1 5 99999999 if TD 0 RR Read Rate FLOW DATA DATA O to the following maximums 99999 999 ifRD 3 999999 99 ifRD 2 9999999 9 ifRD 1 5 99999999 ifRD 0 8 Set Total See ST command above CN Adjust 4mA output point CN DATA DATA is the integer value that the HIT 2A sends to the 4 20mA converter to output 4mA This parameter is passed to the HIT 2A to adjust the 4mA output point of the device This value is used in production at the test step to calibrate the 4mA output point CN will cause an Invalid Command response and absence of the symbol will cause the HIT 2A to ignore the data CM Adjust 20mA output point CM DATA DATA is the integer value that the HIT 2A sends to the 4 20mA converter to output 20mA This parameter is passed to the HIT 2A to adjust the 20mA output point of the device This value is used in production at the test step to calibrate the 20mA output point CM will cause an Invalid Command response and absence of the symbol will cause the HIT 2A to ignore the data HP 306 46 Appendix
12. terminal to circuit common To reset the unit from the front panel the following key seguence is reguired Press P CLEArtot is displayed Press OK To enter edit mode Press A To select yes Press OK To clear total Press A To return to operating mode The flow rate indicator measures the flow rate once every 2 seconds and display the flow rate If the input pulses are not detected within the maximum sample time 1 to 80 seconds a flow rate of zero 0 00 is indicated The analog output is scaled based on the user selected zero and full scale and the measured flow rate The pulse output generates a burst of pulses every 2 seconds in accordance with the instrument setup of pulse scaling A large sample time setting and internal math operations may delay the update rate HP 306 26 Operation and Maintenance 6 2 Maintenance The only scheduled maintenance for the HIT 2A is periodic battery replacement The instrument has a battery monitor feature which illuminates when the lithium battery voltage approaches its end of life A descriptor LO BAT illuminates when the battery voltage falls below this predetermined value The low battery detector operates correctly with all power options The battery or batteries should be replaced within several weeks of the first occurrence of low battery warning Left unattended the unit may become inaccurate cease to operate lose setup information or malfunction Th
13. B Communications SA Set Alarm Output On Alarm Active Sets the alarm output active regardless of the settings US Unit Status UNIT STAT lt DATA gt Requests the status The values for lt DATA gt with no or only one error present are 0 No Errors present 128 EPULSE error 0x080 129 ETOTAL error 0x081 130 ERATE error 0x082 132 EFLOW error 0x084 129 EERES error 0x088 EEPROM reset to factory defaults If multiple errors occur the error codes are logically OR ed For example if the unit has an ETOTAL and ERATE error occurring at the same time the lt DATA gt 131 0x83 cs Clear Status Status Cleared Clears all errors Note The CL and ST commands work as follows The ST command shall store the present value of the total in Non Volatile memory This total in non volatile memory shall be the initial total in the event that device power is removed and then re applied The CL command will clear the total in the device and the stored total in EEPROM but retain the present total in a volatile RAM memory location and keep it as the old total value Removal of power from the unit causes this old total value to be lost When the HIT 2A receives the ST lt CR gt from the PC it shall echo back the old total value until the unit adds any value to the present total If the HIT 2A receives a second CL command
14. D 3 if RD 2 ifRD 1 if RD 0 If UA is Total or Off 991999 923 999999 99 7999999997 999999997 if TD 3 if TD 2 if TD 1 if TD 0 ALARM OUT DATA ST Set Total 99999 9997 0 000 toa maximum defined as follows if TD 3 if TD 2 9999999 9 if TD 1 99999999 if TD 0 TOTAL DATA DATA 0 to the following maximums 99999 999 if TD 3 999999 99 ifTD 2 if TD 1 if TD 0 99999909 99999999 HP 306 Appendix 8 Communications 43 Command Description Allowed Data Response oc Current Out 0 Current output follows rate 1 Current output set to 4mA 2 Current output set to 12mA 3 Current output set to 20mA For 0 response Output equal to input For 1 response Output is 4mA For 2 response Output is 12mA For 3 response Output is 20mA PR Pulse Output Controlled By PS and FO Pulse Output Released The PS and FO menus shall control the pulse output Used to terminate the TP command TP Output 1Hz Test Frequency for Pulse Output Test Pulse Output Sets output to 1Hz 50 duty cycle signal This mode is for factory test Release Alarm Output for Control According to Menu Settings Alarm Released Releases alarm output for control by the alarm output set
15. ENCLOSURE BEHIND PANEL ON HIT 2A PD PANEL MOUNT ENCLOSURE WITH CLEAR DOOR AND LOCK 4 NEMA 1 ENCLOSURE HIT 2A MOUNTED TO THE OUTSIDE OF CLEAR COVER FOR INDOOR DRY INSTALLATION ONLY 5 NEMA 4X ENCLOSURE HIT2 2A ENCLOSURE MOUNTED BEHIND CLEAR COVER WITH SUNSHADE 7 ATEX STAINLESS STEEL EXPLOSION PROOF ENCLOSURE OPTIONS FOR ENCLOSURE STYLE 3 3A AND 7 _M M20 CONDUIT THREAD NOT ALLOWED FOR USE IN CANADA CS SUNSHADE EXPLOSION PROOF ENCLOSURE RATINGS STYLE 3 CSA FM CLASS I DIV 1 GR ABCD CLASS II DIV 1 GR EFG CLASS III TYPE 4X CLASS 1 ZONE 1 AEx IIC IP 66 STYLE3A CSA FM CLASS I DIV 1 GR ABCD CLASS II DIV 1 GR EFG CLASS III TYPE 4X CLASS 1 ZONE 1 AEx d IIC IP 66 ATEX IECEx 2 G Ex d IIC Gb IP66 STYLE 7 CSA CLASS I DIV 1 GR BCD CLASS II DIV 1 GR EFG CLASS III TYPE 4X IP66 CLASS 1 ZONE 1 Ex d IIB H2 IP 66 ATEX IECEx II 2 G Ex d IIC Gb IP66 HP 306 Introduction 3 INPUT POWER MODEL 2 5 OPTION B A INTERNAL BATTERIES TWO EACH THIS OPTION CAN NOT SUPPORT REDI PULSE COILS B _ 8TO 30 VDC EXTERNAL POWER AC UNIVERSAL 100 240 VAC 0 15A 50 60 HZ X ENTER X IF LOOP POWERED ANALOG OUTPUT OPTION C OR D BELOW IS SELECTED LOOP POWERED ANALOG OUTPUT MODEL 2 OPTION C C LOOP POWERED 4 20MA OUTPUT 8 TO 30 VDC D LOOP POWERED 4 20MA OUTPUT WITH INTERNAL BATTERIES
16. Model HIT 2A Hoffer Intelligent Rate Indicator amp Totalizer USER S MANUAL HP 306 April 2015 H HOFFER FLOW CONTROLS INC ing Measurement 107 Kitty Hawk Lane P O Box 2145 Elizabeth City North Carolina 27906 2145 1 800 628 4584 252 331 1997 FAX 252 331 2886 www hofferflow com Email info amp hofferflow com NOTICE HOFFER FLOW CONTROLS INC makes no warranty of any kind with regard to this material including but not limited to the implied warranties of merchantability and fitness for a particular purpose This manual has been provided as an aid in installing connecting calibrating operating and servicing this unit Every precaution for accuracy has been taken in the preparation of this manual however HOFFER FLOW CONTROLS INC neither assumes responsibility for any omissions or errors that may appear nor assumes liability for any damages that may result from the use of the products in accordance with information contained in the manual HOFFER FLOW CONTROLS policy is to provide a user manual for each item supplied Therefore all applicable user manuals should be examined before attempting to install or otherwise connect a number of related subsystems During installation care must be taken to select the correct interconnecting wiring drawing The choice of an incorrect connection drawing may result in damage to the system and or one of the components Please review the complete model numb
17. TIES 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 CONSEQUENTIAL DAMAGES O CS Disclaimer END Be Y SE I HT E Specifications are subject to change without notice Some pages are left intentionally blank HP 306 CONTENTS 1 INTRODUCTION 1 Model Number Designation 2 SPECIFICATIONS 5 2 1 General 5 2 2 Inputs 5 2 3 Battery Powered Version 6 2 4 DC Power Loop Powered 6 2 5 AC POWer 6 2 6 Analog 4 20mA Output Option 6 2 7 Pulse Output Option 7 2 8 Alarm Output Option 7 2 9 Physical 7 Theory of Operation 9 3 1 Funct
18. actor Linearization Decimal Points Accuracy Temperature drift Inputs Magnetic Pickup Frequency Range Signal Type LCD continuously powered 8 digits 0 26 high Resettable from front panel GAL LIT FT3 M3 BBL amp blank 5 digits 0 5 high MIN HR amp DAY The pulses per unit of Total e g pulses gallon are configurable in the range 0 001 to 99 999 999 Up to 20 points Decimal Point positions are fully configurable for both rate and total 0 01 Reading 1 count 50 ppm C 0 2 Hz to 5000 Hz Low level sinusoidal 30 mV P P minimum Opto Isolated DC Pulse Frequency Range Signal Type High Logic 1 Low Logic 0 Min Current Hystersis Min Pulse width Contact Closure Frequency Range Signal Type High Logic 1 Low Logic 0 Internal Pull up 0 Hz to 3000 Hz DC pulse 4 to 30 VDC lt 1 VDC 0 5 mA 0 4 VDC 0 1 msec 0 Hz to 5000 Hz Contact closure to DC common Open or 4 to 30 VDC lt 0 5 VDC 220 kQ to 3 3 VDC HP 306 6 2 3 2 4 2 6 Specification Reset Signal Type Contact closure to DC common High Logic 1 4 to 30 VDC Low Logic 0 lt 0 5 VDC Min Current 0 5 mA Min On 25 msec Internal Pull up 100 KQ to 43 3 VDC External Magnet Activates internal reed switch Battery Powered Version Type Two C size lithium battery packs Battery Life 4 years typical 10 years typical for external power With the pulse ou
19. al Default 1 0 gt 100 Total Units Select Total units If custom is selected all indicators are off gal lit ft3 m3 bbl custom 0000000 0 1 tot d 00000 000 RTE d to 80 PULSE S Fa 10 OFF 100 PuLSE F 8 4 PASS 1234 unit Loc no Max Sample Time Out High Alarm Function Configuration 23 Total Decimal Point Set Total decimal point location Rate Units Select RATE units Rate Decimal Point location Set Rate decimal point location Set maximum time in seconds to sample the input freguency Default 1 z Out Low Sets flow rate value for 4 mA Sets flow rate value for 20 mA output Pulse Scale Sets scale for pulse out 1 10 100 units of total for one pulse out Pulse Frequency Sets frequency of burst of pulse out 1 2 4 8 Password Sets 4 digit password Default 0000 Lock Unit Locks the unit Select Rate or Total for alarm output OFF turns alarm function HP 306 24 Configuration Menu item Alarm Out Sets value to activate the alarm output Default 99999 999 Set Total Sets Total to user defined value Current Out Sets analog output to follow rate or predefined level Pulse Output Test Outputs a test frequency of 1Hz 50 duty cycle Alarm Output Test Activates alarm output 5 2 Default Configuration The HIT 2A is con
20. arriage return The HIT 2A will transmit no more than 35 characters before transmitting a carriage return If a message longer than A 20 characters command is sent the instrument responds with Command Sequence is Too Long lt NL gt If an unrecognized or invalid command is sent the instrument responds with Invalid Command lt NL gt The sending unit RS232C serial port configuration must be configured as follows Baud rate 2400 Data bits 8 Parity none Stop bits 1 Handshaking none The HIT 2A echoes all received messages and then transmits a response string terminated with a carriage return If the sending unit takes longer than one minute to send a message the HIT 2A aborts the message by clearing the receive buffer If the sending unit PC or other such device wishes to change a setting on the HIT 2A the sending unit shall follow the command with an egual sign with the data following immediately after the egual sign The carriage return terminates the message Any HIT 2A response that sends data back to the sending unit shall have an egual sign followed by the data Space is allowed between the egual sign and the data on the return message but the total message length is limited to 35 characters HP 306 Appendix 8 Communications 37 READ Example If the sending unit wishes to read the number of points that the HIT 2A has in the K factor table the sending unit shall s
21. e Loop Driver After measuring the frequency of the HP 306 10 Theory of Operation sguare wave the Microcontroller uses the following eguations to compute the flow rate and current _ frequency PM yCF flowrate Kfactor Where Kfactor Is dependent on the Flow Calculation Method setting and is either the Average K Factor or the Linearized K Factor from the Frequency K Factor table FM 15 the Flow rate Units setting of 0 1 2 or 3 Where 0 is for Seconds 1 is for Minutes 2 is for Hours and 3 is for days CF Is the Correction Factor setting owrate current 4mA i Where AF 15 20 mA maximum Flow Rate value If the calculated flowrate is greater than the AF setting the current will be set to 24mA to signal an Over range condition After calculating the current the Microcontroller digitally sends the current information to the Loop Driver 3 1 4 Loop Driver The loop driver uses the digital information received from the Microcontroller to set the current of the loop The Loop Driver supplies power to both the Preamplifier and Microcontroller 3 1 5 Pulse and Alarm Output The Pulse and Alarm outputs are two optically isolated open collector outputs The alarm output activates when the total flow or the rate reaches a user defined level The pulse output activates to give a scaled pulse output indicative of the total flow Both of these outputs are rated for 100 VDC at 100 mA
22. e batteries should be replaced one at a time to avoid interrupting the power 6 3 Error Messages The HIT 2A is provided with extensive self checking which is used in reporting malfunctions or unusual operating conditions When an error occurs the display will flash with an error message until the user presses the OK button acknowledging the error condition Once an error condition is acknowledged the error message will not be displayed again for 60 seconds if the cause of the error is still present If the alarm output is active from an alarm caused by a rate or total condition depressing the OK button while the display is showing the rate and total will reset the alarm output if the condition that caused the alarm is no longer present If the alarm output is active because of a test command depressing the OK button will not reset the alarm output The following table illustrates the Error Messages the problem or cause and a recommended corrective action HP 306 Operation and Maintenance 27 ERROR CORRECTIVE MESSAGE CAUSE ACTION EtotA L Total rollover None Use different pulse EPuLS scaler or lower Pulse out overflow f E totalizer decimal point EETES EEPROM reset to factory defaults Consult factory Flow rate exceeds the flow rate Reduce TI or ErAtE Yn use lower flow rate PA y decimal point Reduce flow rate or EFLo Flow rate exceeds the 20 mA flow cease Ym A rate setting flow rate setti
23. emble the unit follow the instruction above in the reverse order APPENDIX A Default Configuration 34 APPENDIX A DEFAULT CONFIGURATION Factory default configuration FIELD Value CL No DN 10000000 FC 0 Average KD 3 AK 1 00 NP 20 01 4999 981 F02 4999 982 F03 4999 983 F04 4999 984 F05 4999 985 F06 4999 986 F07 4999 987 F08 4999 988 F09 4999 989 F10 4999 990 F11 4999 991 F12 4999 992 F13 4999 993 F14 4999 994 F15 4999 995 F16 4999 996 F17 4999 997 F18 4999 998 F19 4999 999 F20 5000 000 KO1 1 00 K02 1 00 K03 1 00 K04 1 00 K05 1 00 K06 1 00 K07 1 00 K08 1 00 K09 1 00 K10 1 00 K11 1 00 K12 1 00 K13 1 00 K14 1 00 HP 306 APPENDIX A Default Configuration 35 FIELD Value K15 1 00 K16 1 00 K17 1 00 K18 1 00 K19 1 00 K20 1 00 CF 1 000 TU 100 GAL TD 1 FM 1 MIN RD 3 NB 01 LF 00000 000 AF 99 999 PS 0 OFF FO 8 PA 1234 LK No UA Off AL 99999 981 5 00000 000 oc O Rate TP No AS No HP 306 36 Appendix B Communications APPENDIX B COMMUNICATIONS Message Format And Timeout Communication messages consist of a string of ASCII characters terminated by a carriage return character The maximum message length coming to the HIT 2A is 20 characters including the c
24. end NP lt CR gt The HIT 2A echoes the sent message and responds with NUM PTS 2 lt CR gt WRITE Example If the sending unit wishes to change the number of points to 20 in the K factor table the sending unit shall send NP 20 lt CR gt The HIT 2A echoes the sent message and responds with NUM PTS 20 lt CR gt The HIT 2A checks the ranges for data and rejects writes that are not within the allowed range If the sending unit sends data that is not within the allowed range the HIT 2A echoes the sent message and responds with the value that is currently stored in the HIT 2A Example If the sending unit wishes to change the max sample time to 2000 from the previous setting of 10 the sending unit shall send NB 2000 lt CR gt The HIT 2A echoes the sent message and responds with MAX M TIME 10 lt CR gt HP 306 38 Appendix B Communications Messages Commands Supported By Communications Messages _Description Allowed Data Response Clear Total 0 to 99999999 TOTAL 0 DN Tag Number 0 to 99999999 TAG NUM DATA The first three digits are the units code for total Changing these digits will change the TU settings FC Linearization 0 Average K factor 1 Linearization table F C METHOD or F C METHOD LIN for Linearization table AVG for Average K fact
25. er of each item to be connected and locate the appropriate manual s and or drawing s Identify all model numbers exactly before making any connections A number of options and accessories may be added to the main instrument which are not shown on the basic user wiring Consult the appropriate option or accessory user manual before connecting it to the system In many cases a system wiring drawing is available and may be reguested 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 Return Requests 7 Inquiries Direct all warranty and repair requests inquiries to the Hoffer Flow Controls Customer Service Department telephone number 252 331 1997 or 1 800 628 4584 BEFORE RETURNING ANY PRODUCT S TO HOFFER FLOW CONTROLS PURCHASER MUST OBTAIN A RETURNED MATERIAL AUTHORIZATION RMA NUMBER FROM HOFFER FLOW CONTROLS CUSTOMER SERVICE DEPARTMENT IN ORDER TO AVOID PROCESSING DELAYS The assigned RMA number should then be marked on the outside of the ret
26. figured by the factory before shipment When the instrument is purchased with a Hoffer Flowmeter or when calibration and configuration data are supplied the instrument is configured as specified When the instrument is shipped without specific configuration information the instrument is configured with default values Refer to Appendix A for a listing of the HIT 2A factory default configuration 5 3 Remote Configuration The HIT 2A may be configured remotely via the RS232 communications interface Refer to Appendix B for the communications details HP 306 Operation and Maintenance 25 6 OPERATION AND MAINTENANCE 6 1 Operation A suitable pulse producing device or flow meter is wired to the HIT 2A Signal Input terminals 1 Sig and 2 518 The Signal Input circuit must be configured for the connected input device using the appropriate jumper blocks Internal batteries external DC or a loop current may provide power to the unit For all power options other than internal batteries A if the primary power is lost the internal backup battery will provide for continued operation of the totalizer Once properly wired the operation of the HIT 2A is automatic The flow totalizer is updated every 2 seconds with the latest total If no input counts are received the unit remains in a low power state to conserve power The flow total may be cleared by the front panel switch seguence or by a contact closure on the remote reset
27. ger values from 0 and less than 999 will map to custom units TOT UNITS DATA DATA shallbe GAL for gallons LIT forliters FT3 for cubic feet M3 for cubic meters BBL for barrels CUS for custom These three numbers will be the same as the first three digits of the tag number Changes to this menu shall cause the changes to the tag number HP 306 40 Appendix B Communications Command Description Allowed Data Response TD Total Decimal Point Location 0 for 00000000 1 for 0000000 0 If UA set to Total and AL is greater than 9999999 9 it not allowed 2 for 000000 00 If UA set to Total and AL is greater than 999999 99 it not allowed 3 for 00000 000 If UA set to Total and AL is greater than 99999 999 it not allowed FLOW DEC L DATA FM Rate Units 0 for seconds 1 for minutes 2 for hours 3 fordays FLOW UNITS DATA DATA shallbe SEC for seconds MIN for minutes HR for hours DAY for days Rate Decimal Point Location 0 for 00000 1 for 0000000 0 and AF and AL if UA set to Rate is less than 9999999 9 otherwise not allowed 2 for 000000 00 and AF and AL if UA set to Rate is less than 999999 99 otherwise not allowed 3 for 00000 000 and AF and AL if UA set to Rate is less than 99999 999 otherwise not allo
28. iguration must be set to the following Baud rate 2400 Data bits 8 Parity none Stop bits 1 Handshaking None DB9 Molex Paala CE 4 VDCI 00 DSR Tx 3 7RTS BS H DIRA gt 8 CTS D SIG COM 5 9 NC Pin2 Pin 1 Hoffer HIT2A 301 Communications Cable 4 4 Wiring When connecting the HIT 2A 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 4 5 Terminal Designations Terminal Description 1 Signal Pulse Input 2 Signal Pulse Input 3 Shield 4 Reset Input 5 VDC 6 7 8 9 VDC Reset Common Pulse out Pulse out Alarm 10 Alarm 11 4 20 mA 12 4 20 mA 306 20 Installation This page intentionally left blank HP 306 Configuration 21 5 CONFIGURATION The HIT 2A is fully configurable with all parameters being stored in non volatile memory The instrument may be configured using the front panel keys a PC running Terminal Emulation software a ASCII terminal or a PC running the HIT 2A Configuration software 5 1 Local Configuration Local configuration is accomplished using the four buttons below the disp
29. ional Blocks 9 3 1 1 User Interface 9 3 1 2 Preamplifier 9 3 1 3 Microcontroller 9 3 1 4 Loop Driver 10 3 1 5 Pulse and Alarm Output 10 3 1 6 Communications Interface 11 3 1 7 Clearing Total 11 3 2 System Response Time 11 Installation mm mmmmmmmmm mmmmmm m 13 4 1 Typical Input Connections 13 4 2 Typical Output Connections 16 4 3 Communications Connections 19 4 4 Wiring 19 4 5 Terminal Designations 19 Configuration 21 5 1 Local Configuration 21 5 2 Default Configuration 24 5 3 Remote Configuration 24 Operation and Maintenance
30. lay while viewing the configuration parameters on the display The local configuration mode is entered by pressing the P button Once in the local configuration mode each of the four buttons have a special purpose as detailed below Press to initiate selection operation and to accept selection Press to increment digit or 5 change selection ress for next menu item Press to move cursor one position to the right HP 306 22 Configuration Display CLEArtot no 10000000 tA9 AuErAgE Linear Average 00000 000 FAC d 1 000 A FAC Points 2 20 20 Clear Total Clears accumulated total and sets TOTAL display to zero Tag Number User defined 5 digit number Linearization Method Sets the flow calculation method to average K factor or K factor table K factor Decimal Point Set K factor decimal point location Average K factor Enter average K factor Number of Points Sets the number of entries in the linearization table 4999 981 0 to Fr Ol 5000 Frequency 1 20 Enter a frequency in Hz for each entry in the table Decimal point is K factor 1 20 Enter a k factor in pulses gal for each entry in the table 1 000 0 001 to C FAC 99999 999 110 3 140 LIT 150 M3 180 881 tot unit 100 HP 306 Correction Factor User defined number between 0 001 and 99999 999 to multiply flow and tot
31. ng LO BAT Low battery Replace battery ies 6 4 Analog Output Calibration The 4 20 mA analog output has been accurately set to 20 000 mA by the factory No adjustment is required The 4 20 mA output may be verified periodically by installing a digital milliamp meter in series with the analog output and simulating a full scale or over range flow rate HP 306 28 Operation and Maintenance This page intentionally left blank HP 306 Assembly Disassembly Procedure 29 7 ASSEMBLY DISASSEMBLY PROCEDURE WARNING The lithium battery that powers the HIT 2A is 8 sealed unit however should Lithium batteries develop a leak toxic fumes could escape upon opening the enclosure Ensure that the instrument is in a well ventilated area before opening the enclosure to avoid breathing fumes trapped inside the enclosure Exercise caution in handling and disposing of spent or damaged batteries Important Before replacing the lithium battery save record the total Once the battery is replaced and power is restored to the unit restore the total using the Set Total Command either manually using the key pad or use the Windows configuration software 7 1 Nema Enclosure Follow the disassembly instruction below for accessing electronic terminal block replacing the battery or replacing the electronic PCB assembly Remove four screws with a Phillips head screwdriver and lift off the cover HP 306 30 Assembly
32. onfiguration and monitoring can be performed using any PC based communications program e g HyperTerminal or ASCII terminal The instrument is housed in an attractive NEMA 4X polycarbonate enclosure and can be mounted directly on a flowmeter or wall mounted using an optional mounting brackets or an EX enclosure This instrument has been designed to conform to the EMC Directive of the Council of European Communities 89 336 EEC and the following standards Generic Emission Standard EN 61000 6 3 Residential Commercial amp Light Industry Environment Generic Immunity Standard EN 61000 6 1 Residential Commercial amp Light Industry Environment Electrostatic discharge reguirements EN 61000 4 2 Radiated radio freguency electromagnetic immunity EN 61000 4 3 Electrical fast transient burst requirements EN 61000 4 4 Immunity to conducted disturbances EN 61000 4 6 HP 306 Introduction 2 Model Number Designation MODEL HI T 2A TOTALI ZER FLOW RATE I NDI CATOR MODEL HIT 2A A B D E E ENCLOSURE STYLE INPUT POWER LOOP POWERED ANALOG OUTPUT OPTIONS MOUNTING SPECIAL FEATURES ENCLOSURE STYLE MODEL HIT 2A A JG OPTION A 2 NEMA 4X ENCLOSURE HIT 2A MOUNTED BEHIND CLEAR COVER 3 _ EXPLOSION PROOF ENCLOSURE 3A ATEX Exd ENCLOSURE STANDARD BLUE GB ENCLOSURE FOR BRAZIL GRAY P PANEL MOUNT SURFACE MOUNTED ON CUSTOMER S PANEL NO
33. onforming goods as provided in the following paragraphs In the event Purchaser believes the goods are defective the goods must be returned to HFC transportation prepaid by Purchaser within twelve 12 months after delivery of goods or eighteen 18 months for goods delivered outside the continental United States for inspection by HFC If HFC s inspection determines that the workmanship or materials are defective the goods 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 the lowest cost transportation available Prior to returning the goods 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 no later than the warranty period otherwise such claims shall be deemed waived See the Return Reguests Inguiries Section of this manual If HFC s inspection reveals the goods are 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 i receipt of Purchaser s written instructions and ii the cost of transportation If Purchaser does not respond within thirty 30 days after notice from HFC the goods will
34. or K Factor Decimal Point Location 0 for 00000000 1 for 0000000 0 and all K Factors are less than 9999999 9 otherwise not allowed 2 for 000000 00and all K Factors are less than 999999 99 otherwise not allowed 3 for 00000 000 and all K Factors are less than 99999 999 otherwise not allowed K FAC DECL DATA AK Average K Factor 0 001 to 99999 999 if KD 3 999999 99 ifKD 2 9999999 9 ifKD 1 99999999 ifKD 0 AVG KFAC DATA HP 306 Appendix 8 Communications 39 Command Description Allowed Data Response NP Number Points in the Table 2 to w 2 0 m NUM PTS DATA FH Frequency 1 20 F01 hasarangeof 0 000 tothe value of F02 minus 0 001 F20 has a range of the value from F19 plus 0 001 to 5000 000 Frequencies F02 to F19 must be 0 001 greater than the previous frequency and 0 001 less than the next frequency FREQ DATA for FO1 through F20 Data to fixed three decimal places Kit K Factor 1 20 K FACT DATA for KO1 through K09 K FACT DATA for K10 through K20 DATA to decimal places as per KD command CF Correction Factor 0 001 to 9999999 999 CORR FACT DATA TU Total Units 100 for gallons 140 forliters 110 for cubic feet 150 for cubic meters 180 for barrels All other inte
35. tings AS Alarm Output Test 0 Alarm output is set low 1 Alarm output is set high For 0 response Alarm Active For 1 response Alarm Released After using the AS command you must initiate a RA command to allow HIT 2A to return to normal operation HP 306 44 Appendix 8 Communications System Commands Supported by Communications Messages OI Output 4mA Output is 4mA Current output set to 4mA MO Output 12mA Output is 12mA Current output set to 12mA OM Output 20mA Output is 20mA Current output set to 20mA OF Output Rate Input Output equal to input Current output follows rate AA Auto Data F DATA R DATA T DATA The response not the echo is sent every two seconds until it receives another message from the master The DATA following the F denotes the freguency of the pulses to a precision of three places past the decimal the DATA following the R denotes the rate to a precision of three places past the decimal and the DATA following the T denotes the total to a precision of three places past the decimal DA Dump All All of the responses in previous table The HIT 2A gives all responses except for the CL command UI Unit Identification UNIT MODEL HIT2A XX YY ZZ Model and software number for the unit Xx is the hardware revision number YY ZZ is the
36. tput OFF With pulse output ON 30 less DC Power Loop Powered Voltage 8 to 30 VDC Current lt 4mA Loop Burden 8 VDC maximum Supply Backup One 1 C size Lithium battery Protection Reverse polarity protected AC Power Voltage 100 to 240 VAC Frequency 47 440 Hz Current 150 mA Line Regulation 0 3 typ Protection Short circuit Over voltage amp Over temperature Supply Backup One 1 C size Lithium battery Analog 4 20mA Output Option Scale 4 20 mA follows rate Accuracy 0 02 of Full Scale 20 C Temperature drift 40 ppm C Update Time 2 0 seconds Connection Two wire Protection Reverse polarity protected HP 306 2 7 2 8 2 9 Specification 7 Pulse Output Option Type Opto isolated open collector 100 VDC 100 mA Divider 1 10 100 or OFF Rate amp Duration See below SPEED Hz 1 2 4 8 Min on off msec 500 250 125 62 5 Alarm Output Option Type Opto isolated open collector 100 VDC 100 mA Function Rate or Total Physical Temperature Operating 40 F 40 C to 158 F 70 C 58 F 50 C with optional heater 32 F 09C to 140 F 60 C with AC power option Humidity 0 90 Non condensing Packaging Wall Mount amp Explosion proof Dimensions for Wall Mount enclosure 4 33 110 mm wide x 4 33 110 mm long 4 33 110 mm tall HP 306 8 _ Specification This page intentionally left blank HP 306 Theory of Operation 9 3 THEORY OF OPERATION
37. urn package and on any correspondence FOR WARRANTY RETURNS please FOR NON WARRANTY REPAIRS OR have the following information available CALIBRATIONS consult HOFFER FLOW BEFORE contacting HOFFER FLOW CONTROLS for current repair calibration CONTROLS charges Have the following information 1 P O number under which the available BEFORE contacting HOFFER product was PURCHASED FLOW CONTROLS 2 _ Model and serial number of the 1 P O number to cover the COST of the product under warranty and repair calibration 3 Repair instructions and or specific 2 _ Model and serial number of the problems relative to the product product and 3 _ Repair instructions and or specific problems relative to the product HFC 9907 A LIMITED WARRANTY HOFFER FLOW CONTROLS INC HFC warrants HFC s products goods described in the specifications incorporated in this manual to be free from defects in material and workmanship under normal use and service but only if such goods have been properly selected for the service intended properly installed and properly operated and maintained This warranty shall extend for a period of one 1 year from the date of delivery to the original purchaser or eighteen 18 months if the delivery to the original purchaser occurred outside the continental United States This warranty is extended only to the original purchaser Purchaser Purchaser s sole and exclusive remedy is the repair and or replacement of nonc
38. wed RATE DEC L DATA NB Max Sample Time T m to 8 0 u MAX M TIME DATA LF Out Low 0 000 toa maximum value of the Out High setting 4mA FLOW DATA HP 306 Appendix 8 Communications 41 Command Description Allowed Data Response AF Out High Minimum is the Out Low Setting LF to a maximum of the following 99999 999 ifRD 3 999999 99 ifRD 2 9999999 9 ifRD 1 99999999 ifRD O 20mA FLOW DATA PS Pulse Scale wg for OFF Md for 1 10 for10 100 for100 PULS SCALE DATA DATA shallbe OFF for OFF 51 7 for 1 10 for 10 100 for 100 FO Pulse Freguency 1 m 2 m 4 m 8 m PULS FREQ DATA PA Password Ngr to 99997 PASS WORD DATA LK Lock Unit 0 for NO 1 for YES LOCK UNIT DATA DATA shallbe YES for YES NO for NO HP 306 42 Appendix B Communications Command gt Description Allowed Data Response UA Alarm Function 0 for OFF 1 for RATE 2 for TOTAL ALARM FUNC DATA DATA shallbe OFF for OFF RAT for RATE TOT for TOTAL AL Alarm Out 0 001 10 8 maximum defined as follows If UA is RATE 99999 9997 9999995997 19999999 IT 99999999 if R
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