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Hoffer Flow Controls HIT-2A User Manual

Intelligent rate indicator & totalizer
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Model: HIT-2A
Hoffer Intelligent
Rate Indicator & Totalizer
Hoffer Intelligent
Rate Indicator & Totalizer
Model: HIT-2A
USER'S MANUAL
USER'S MANUAL
HP-306
November 2009
HP-306
October 2013
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.comE-mail: info@hofferflow.com

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  • Page 1 Model: HIT-2A Hoffer Intelligent Rate Indicator & Totalizer Hoffer Intelligent Rate Indicator & Totalizer Model: HIT-2A USER’S MANUAL USER’S MANUAL HP-306 November 2009 HP-306 October 2013 107 Kitty Hawk Lane, P.O. Box 2145, Elizabeth City, NC 27906-2145 800-628-4584 252-331-1997 FAX 252-331-2886...
  • Page 3 The information contained in this document is subject to change without notice. Return Requests / 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’...

  • Page 4: Limited Warranty

    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.

  • Page 5: Table Of Contents

    CONTENTS Introduction --------------------------------------------------------------- 1 Model Number Designation ---------------------------------------- 2 SPECIFICATIONS ------------------------------------------------------ 3 General ---------------------------------------------------------------- 3 Inputs ------------------------------------------------------------------ 3 Battery Powered Version ------------------------------------------- 4 DC Power/Loop Powered------------------------------------------- 4 AC Power ------------------------------------------------------------- 4 Analog (4-20mA) Output Option ---------------------------------- 4 Pulse Output Option ------------------------------------------------- 5 Alarm Output Option ------------------------------------------------ 5 Physical --------------------------------------------------------------- 5 Theory of Operation ----------------------------------------------------- 7...
  • Page 6 HP-306...
  • Page 7 Introduction 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 frequency signal, a pulse signal, or a contact closure on the input and provides a linearized rate indication and total.

  • Page 8: Model Number Designation

    MOUNTING SPECIAL FEATURES ENCLOSURE STYLE MODEL HIT-2A-( ( A ) OPTION NEMA 4X ENCLOSURE, HIT-2A MOUNTED BEHIND CLEAR COVER. EXPLOSION-PROOF ENCLOSURE. (3A) ATEX Exd ENCLOSURE, STANDARD BLUE. (3B) ENCLOSURE FOR BRAZIL, GRAY. PANEL MOUNT - SURFACE MOUNTED ON CUSTOMER’S PANEL;...

  • Page 9: Introduction

    Introduction OPTIONS MODEL HIT-2A-( ( D ) OPTION 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.
  • Page 10 Introduction This page intentionally left blank. HP-306...

  • Page 11: Specifications

    Specification 2. SPECIFICATIONS General Display: LCD, continuously powered Total: 8 digits 0.26" high. Resettable from front panel. Total Units: GAL, LIT, FT3, M3, BBL, & “blank”. Rate: 5 digits 0.5" high. Rate Units: /MIN, /HR, & /DAY K-factor: The pulses per unit of Total (e.g. pulses/gallon) are configurable in the range 0.001 to 99,999,999.

  • Page 12: Battery Powered Version

    Specification Reset: Signal Type: Contact closure to DC common High (Logic 1): 4 to 30 VDC Low (Logic 0): < 0.5 VDC Min Current: 0.5 mA Min On: 25 msec Internal Pull-up: 100 kΩ to +3.3 VDC External Magnet: Activates internal reed switch Battery Powered Version Type: Two C-size lithium battery packs.

  • Page 13: Pulse Output Option

    Specification Pulse Output Option Type: Opto-isolated open collector (100 VDC, 100 mA). Divider: 1, 10, 100, or OFF Rate & Duration: See below. SPEED (Hz) Min on/off (msec) 62.5 Alarm Output Option Type: Opto-isolated open collector (100 VDC, 100 mA). Function: Rate or Total Physical...
  • Page 14 Specification This page intentionally left blank. HP-306...

  • Page 15: Theory Of Operation

    Theory of Operation 3. THEORY OF OPERATION The HIT-2A consists of six functional blocks. These functional blocks are the User Interface, Preamplifier, Microcontroller, Loop Driver, Pulse and Alarm Output, and Communications Interface. Loop Driver 4-20 mA Preamp Microcontroller Flowmeter Input...

  • Page 16: Loop Driver

    Theory of Operation square-wave, the Microcontroller uses the following equations to compute the flow rate and current. frequency  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.

  • Page 17: Communications Interface

    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.
  • Page 18 Theory of Operation This page intentionally left blank. HP-306...

  • Page 19: Installation

    The input is protected for over voltage up to 50 volts. The flowmeter input (terminals 1 & 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). Typical Input Connections MAG Coil &...
  • Page 20 Installation TTL Redi-Pulse Pick-up with DC Power Heater Option Reset Input HP-306...
  • Page 21 Installation Loop Power with TTL Redi-Pulse Requires 3-Wire Installation Loop Power with Redi-Pulse Open Collector Output Requires 3-Wire Installation HP-306...

  • Page 22: Typical Output Connections

    Installation TTL Redi-Pulse with AC Power Typical Output Connections Analog Output with DC Power Heater HP-306...
  • Page 23 Installation Analog Output with AC Power HIT-2A AC/DC Power Supply GND/ Earth Loop - Loop + Customer Load Alarm Output HP-306...

  • Page 24: Pulse Output

    Installation Analog Output and TTL Redi-pulse with AC Power Redi Pulse SIG + SIG - GND/ Earth Pulse Output HP-306...

  • Page 25: Communications Connections

    Installation Communications Connections Communications with the HIT-2A using a terminal or a PC using the Windows configuration program requires 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.
  • Page 26 Installation This page intentionally left blank. HP-306...

  • Page 27: Configuration

    Configuration 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.
  • Page 28 Configuration Menu item Display Option Description CLEArtot Clear Total Clears accumulated total and sets TOTAL display to zero. 10000000 Tag Number User defined 5-digit number. (#####) AuErAgE Linearization Method Linear Sets the flow calculation method to Average FAC NN average K-factor or K-factor table. 00000.000 K-factor Decimal Point Set K-factor decimal point location.
  • Page 29 Configuration Menu item Display Option Description FLo u Rate Units Select RATE units. NN in 00000.000 Rate Decimal Point location Set Rate decimal point location. FL d Max Sample Time SAPLE Set maximum time in seconds to sample the input frequency. Default 1.000 Out Low Sets flow rate value for 4 mA...

  • Page 30: Default Configuration

    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. Remote Configuration The HIT-2A may be configured remotely via the RS232 communications interface.

  • Page 31: Operation And Maintenance

    6. OPERATION AND MAINTENANCE Operation A suitable pulse producing device or flow meter is wired to the HIT-2A Signal Input terminals 1 (Sig +) and 2 (Sig -). The Signal Input circuit must be configured for the connected input device using the appropriate jumper blocks.

  • Page 32: Maintenance

    The batteries should be replaced one at a time to avoid interrupting the power. 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.

  • Page 33: Analog Output Calibration

    Operation and Maintenance ERROR CORRECTIVE CAUSE MESSAGE ACTION EtotAL Total rollover. None Use different pulse scaler or lower EPuLSE Pulse out overflow. totalizer decimal point EErES EEPROM reset to factory defaults. Consult factory Reduce flow rate or Flow rate exceeds the flow rate ErAtE use lower flow rate display capability.
  • Page 34 Operation and Maintenance This page intentionally left blank. HP-306...

  • Page 35: Appendix A - Default Configuration

    Appendix A – Default Configuration APPENDIX A – DEFAULT CONFIGURATION Factory default configuration: FIELD Value 10000000 0 (Average) 1.00 4999.981 4999.982 4999.983 4999.984 4999.985 4999.986 4999.987 4999.988 4999.989 4999.990 4999.991 4999.992 4999.993 4999.994 4999.995 4999.996 4999.997 4999.998 4999.999 5000.000 1.00 1.00 1.00 1.00...
  • Page 36 Appendix A – Default Configuration FIELD Value 1.00 1.00 1.00 1.00 1.00 1.00 1.000 100 (GAL) 1 (MIN) 00000.000 99.999 0 (OFF) 1234 99999.981 00000.000 0 (Rate) HP-306...

  • Page 37: Appendix B - Communications

    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.
  • Page 38 “NUM PTS 20<CR>”. 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.

  • Page 39: Messages

    - Communications Appendix B Messages Commands Supported By Communications Messages Command Description/Allowed Data/Response Clear Total “0” to “99999999” “TOTAL = 0” 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.
  • Page 40 - Communications Appendix B Command Description/Allowed Data/Response Number Points in the Table “2” to “20” “NUM PTS =(DATA)” Frequency 1-20 F01 has a range of “0.000” to the value of F02 minus 0.001; F20 has a range of the value from F19 plus 0.001 to “5000.000”;...
  • Page 41 - Communications Appendix B Command Description/Allowed Data/Response 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.
  • Page 42 - Communications Appendix B Command Description/Allowed Data/Response Out High Minimum is the Out Low Setting (LF) to a maximum of the following: “99999.999” if RD = 3 “999999.99” if RD = 2 “9999999.9” if RD = 1 “ 99999999” if RD = 0 “20mA FLOW =(DATA)”...
  • Page 43 - Communications Appendix B Command Description/Allowed Data/Response Alarm Function “0” for OFF “1” for RATE “2” for TOTAL “ALARM FUNC=(DATA)” (DATA) shall be: “OFF” for OFF “RAT” for RATE “TOT” for TOTAL Alarm Out “0.001” to a maximum defined as follows: If UA is RATE: “99999.999”...
  • Page 44 “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...
  • Page 45 Dump All All of the responses in previous table. The HIT-2A gives all responses except for the CL command. 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 software revision where YY...
  • Page 46 See ST command above. 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.
  • Page 47 Removal of power from the unit causes this old total value to be lost. When the HIT-2A receives the ST<CR> from the PC, it shall echo back the old total value until the unit adds any value to the present total.
  • Page 48 For example, if the present total is 123.45 and the HIT-2A receives CL<CR>, 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<CR>, the HIT-2A echoes with the total 123.45, the old total value.

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