Hoffer Flow Controls HIT-2A User Manual Download Page 18 | Manualshive

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Theory of Operation

10

HP-306

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Summary of Contents for HIT-2A

Page 1: ...vember 2009 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 USER S MANUAL Model HIT 2A Hoffer Inte...

Page 2: ......

Page 3: ...y 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 o...

Page 4: ...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...

Page 5: ...1 4 Loop Driver 8 3 1 5 Pulse and Alarm Output 8 3 1 6 Communications Interface 9 3 2 System Response Time 9 4 Installation 11 4 1 Typical Input Connections 11 4 2 Typical Output Connections 14 4 3 Co...

Page 6: ...HP 306...

Page 7: ...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 fl...

Page 8: ...LOSURE 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 HIT2A ENCLOSURE MOUNTED BEHIND CLEAR COVER WITH SUN...

Page 9: ...IPE MOUNTING KIT 2 PIPE OR SMALLER SPECIFY IF PIPE IS VERTICAL OR HORIZINTAL SPECIAL FEATURES MODEL HIT 2A F OPTION F CE CE MARK REQUIRED FOR EUROPE MIL MIL S 901D SHOCK TESTS H I HIGH IMPACT SHIPBOAR...

Page 10: ...Introduction 2B HP 306 This page intentionally left blank...

Page 11: ...positions are fully configurable for both rate and total Accuracy 0 01 Reading 1 count Temperature drift 50 ppm C 2 2 Inputs Magnetic Pickup Frequency Range 0 2 Hz to 5000 Hz Signal Type Low level si...

Page 12: ...ith pulse output ON 30 less 2 4 DC Power Loop Powered Voltage 8 to 30 VDC Current 4 mA Loop Burden 8 VDC maximum Supply Backup One 1 C size Lithium battery Protection Reverse polarity protected 2 5 AC...

Page 13: ...62 5 2 8 Alarm Output Option Type Opto isolated open collector 100 VDC 100 mA Function Rate or Total 2 9 Physical Temperature Operating 40 F 40 C to 158 F 70 C 58 F 50 C with optional heater 32 F 0 C...

Page 14: ...Specification 6 HP 306 This page intentionally left blank...

Page 15: ...t 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 t...

Page 16: ...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...

Page 17: ...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...

Page 18: ...Theory of Operation 10 HP 306 This page intentionally left blank...

Page 19: ...Turbine Flowmeters Reed Switches Logic Signals Open Collector Outputs The input is protected for over voltage up to 50 volts The flowmeter input terminals 1 2 must be configured for the selected signa...

Page 20: ...Installation 12 HP 306 TTL Redi Pulse Pick up with DC Power Reset Input Heater Option...

Page 21: ...Installation 13 HP 306 Loop Power with TTL Redi Pulse Requires 3 Wire Installation Loop Power with Redi Pulse Open Collector Output Requires 3 Wire Installation...

Page 22: ...Installation 14 HP 306 TTL Redi Pulse with AC Power 4 2 Typical Output Connections Analog Output with DC Power Heater...

Page 23: ...Installation 15 HP 306 Analog Output with AC Power Alarm Output HIT 2A AC DC Power Supply TB Customer Load DCS L N GND Earth Loop Loop...

Page 24: ...Installation 16 HP 306 Analog Output and TTL Redi pulse with AC Power Pulse Output 1 2 3 4 5 6 12 11 10 9 8 7 JP4 JP2 A B C SIG SIG Redi Pulse L N GND Earth...

Page 25: ...01 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 s...

Page 26: ...Installation 18 HP 306 This page intentionally left blank...

Page 27: ...al Configuration Local configuration is accomplished using the four buttons below the display while viewing the configuration parameters on the display Once in the local configuration mode each of the...

Page 28: ...PointS 20 2 to 20 Number of Points Sets the number of entries in the linearization table 4999 981 Fr 01 0 to 5000 Frequency 1 20 Enter a frequency in Hz for each entry in the table Decimal point is f...

Page 29: ...utHi Out High Sets flow rate value for 20 mA output PuLSE S oFF oFF 1 10 100 Pulse Scale Sets scale for pulse out 1 10 100 units of total for one pulse out OFF turns pulse out off PuLSE F 8 1 2 4 8 Pu...

Page 30: ...tion The HIT 2A is configured 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 configur...

Page 31: ...emains in a low power state to conserve power The flow total may be cleared by the front panel switch sequence or by a contact closure on the remote reset terminal to circuit common To reset the unit...

Page 32: ...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 wi...

Page 33: ...duce flow rate or use lower flow rate decimal point EFLo Flow rate exceeds the 20 mA flow rate setting Reduce flow rate or increase 20 mA flow rate setting LO BAT Low battery Replace battery ies 6 4 A...

Page 34: ...Operation and Maintenance 26 HP 306 This page intentionally left blank...

Page 35: ...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 F...

Page 36: ...on 28 HP 306 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 ST 00...

Page 37: ...iguration 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...

Page 38: ...hall send NP 20 CR The HIT 2A echoes the sent message and responds with 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...

Page 39: ...verage K factor 1 Linearization table F C METHOD AVG for Average K factor or F C METHOD LIN for Linearization table KD K Factor Decimal Point Location 0 for 00000000 1 for 0000000 0 and all K Factors...

Page 40: ...laces K K Factor 1 20 K FACT DATA for K01 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 1...

Page 41: ...nits 0 for seconds 1 for minutes 2 for hours 3 for days FLOW UNITS DATA DATA shall be SEC for seconds MIN for minutes HR for hours DAY for days RD Rate Decimal Point Location 0 for 00000 1 for 0000000...

Page 42: ...if RD 3 999999 99 if RD 2 9999999 9 if RD 1 99999999 if RD 0 20mA FLOW DATA PS Pulse Scale 0 for OFF 1 for 1 10 for 10 100 for 100 PULS SCALE DATA DATA shall be OFF for OFF 1 for 1 10 for 10 100 for 1...

Page 43: ...follows If UA is RATE 99999 999 if RD 3 999999 99 if RD 2 9999999 9 if RD 1 99999999 if RD 0 If UA is Total or Off 99999 999 if TD 3 999999 99 if TD 2 9999999 9 if TD 1 99999999 if TD 0 ALARM OUT DAT...

Page 44: ...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 i...

Page 45: ...eives another message from the master The DATA following the F denotes the frequency of the pulses to a precision of three places past the decimal the DATA following the R denotes the rate to a precis...

Page 46: ...ut 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...

Page 47: ...me the DATA 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...

Page 48: ...ceives ST CR 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 CR the HIT 2A will echo 0...

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