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JENCO 6311 Operation Manual

Microcomputer based ph / orp and temperature controller
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OPERATION MANUAL
JENCO MODEL 6311
MICROCOMPUTER BASED
pH / ORP and Temperature
CONTROLLER
JENCO INSTRUMENTS, INC.
7968 ARJONS DR., SUITE C
SAN DIEGO, CA 92126
TEL: (858) 578-2828
FAX: (858) 578-2886
E-MAIL:jencoi@ix.netcom.com E-MAIL:jencoe@ms2.hinet.net
SHANGHAI JENCO ELECTRONICS, LTD.
SHANGHAI SONGJIANG SIJING TOWN
EAST ECONOMIC & TECHNOLOGY DEV. AREA (B)
SHANGHAI, CHINA
TEL: 86-21-5761-9599
FAX: 86-21-5761-9598
E-MAIL:jenco@public.sta.net.cn
JENCO ELECTRONICS, LTD.
P.O. BOX LINKOU-117
TAIPEI HSIEN, TAIWAN,R.O.C.
TEL: (886-2) 2601-6191
FAX: (886-2) 2601-7206

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  • Page 1 OPERATION MANUAL JENCO MODEL 6311 MICROCOMPUTER BASED pH / ORP and Temperature CONTROLLER JENCO INSTRUMENTS, INC. JENCO ELECTRONICS, LTD. 7968 ARJONS DR., SUITE C P.O. BOX LINKOU-117 SAN DIEGO, CA 92126 TAIPEI HSIEN, TAIWAN,R.O.C. TEL: (858) 578-2828 TEL: (886-2) 2601-6191...

  • Page 2: Table Of Contents

    CONTENTS Page I. INITIAL INSPECTION and ASSEMBLY II. GENERAL INTRODUCTION III.USING THE JENCO MODEL 6311 A.FRONT PANEL B.LCD SCREEN C.REAR CONNECTORS D.TURNING ON/OFF THE INSTRUMENT IV. MODEL 6311 MODES A.MAIN DISPLAY MODE B.CALIBRATION/SETTING MODE a. PASSWORD CHECK screen. b. CALIBRATION/ SETTING SELECT screen 1.

  • Page 3: Initial Inspection And Assembly

    I. INITIAL INSPECTION and ASSEMBLY Carefully unpack the instrument and accessories. Inspect for damages made in shipment. If any damage is found, notify your Jenco representative immediately. All packing materials should be saved until satisfactory operation is confirmed. MOUNTING PROCEDURE 1.

  • Page 4: General Introduction

    The system also has an isolated 4-20mA analog output, offset and span configurable for the pH or ORP display. The model 6311 comes with a RS485 interface that can easily let the user log all data (from multiple model 6311 or other Jenco Models with rs485) with an IBM PC/AT compatible computer.

  • Page 5: Iii.using The Jenco Model 6311

    III. USING THE JENCO MODEL 6311 A. FRONT PANEL 1. The [MODE] key. 1a. In MAIN display mode this key will switch the display from pH, ORP absolute mV, ORP relative mV, CAL and back to pH display again. 1b. In the PASSWORD...
  • Page 6 ideal EFFICIENCY (100%) for about four seconds before continuing to 4mA setting. 3. The [ ] UP key. In CALibration mode where the user can change the settings, this key will show the next possible option. If in decade number format this key will increment the digit.

  • Page 7: B.lcd Screen

    B. LCD SCREEN 1. MAJOR LCD DISPLAY 2. S.P. annunciator– Set Point, this will turn ON while changing /viewing the RELAY 1- RELAY 4 settings. 3. 4mA & 20mA annunciators – the respective annunciator will turn ON while in the 4 mA or 20 mA setting mode. 4.
  • Page 8 in RELAY1 – RELAY4 settings. 8. mA annunciator – this annunciator will turn ON if the user is in 4mA or 20mA setting. 9. ID annunciator – this annunciator will turn ON if the user is in ID (RS485 address) setting. 10.

  • Page 9: C.rear Connectors

    AC power supply. 1. Connect the AC line to the rear of the instrument. The model 6311 can be used with 115 or 230VAC 50/60 Hz. Power consumption is 6 watts. Make sure the EARTH connector is connected to the earth lead of the AC power line.

  • Page 10: D.turning On/Off The Instrument

    4. A +5VDC and -5VDC (max 20mA for each) output to provide excitation voltage for pH/ORP pre-amplifier only. CAUTION: 1. MAKE SURE THAT THE POWER IS UNPLUGGED BEFORE WIRING YOUR PROBES, RELAY ETC. 2. MAKE SURE YOU CONNECT THE AC POWER CORD TO THE CORRECT AC TERMINALS.

  • Page 11: Model 6311 Modes

    There should be no air bubbles around the probes either. Shaking or moving the probes vigorously before recording any measurement will dislodge any bubbles formed in the probes. IV. MODEL 6311 MODES A. MAIN DISPLAY MODE Turning ON the unit will always display MAIN display mode.

  • Page 12: B.calibration/Setting Mode

    4. ORP-RmV - a measurement of relative ORP mV. The OFFSET value at the ORP CALIBRATION page will be added to the ORP absolute value to display the ORP relative value. Pressing [MODE] in MAIN display mode will cycle the display from the four modes above.

  • Page 13: Calibration/ Setting Select Screen

    CAUTION: If the unit is UNLOCKED then every time the user enters the Calibration/Setting mode the relays and analog out will be FROZEN (control relays and current output will not be updated even if the input is changing). b. CALIBRATION/ SETTING SELECT screen This screen will let the user select only one (pH, ABS.

  • Page 14: Ph Buffer I (Stand) Select

    This screen will let the user select what temperature probe (10KΩ thermistor, Balco 3KΩ resistor or RTD pt-1000) the user will use. This screen will always default to the last temperature probe the user selected. For most application the user will only use one kind of temperature probe so the user don’t need to change this selection once you select the correct temperature probe.

  • Page 15: Step By Step Ph Calibration

    This is the actual pH calibration. The initial display will be the chosen buffer for pH BUFFER I SELECT. The “STAND” annunciator will blink indicating the unit is waiting for the user to start the calibration. cleaned electrode temperature probe in buffer I. Pressing the [OK] key will start the calibration.
  • Page 16 We recommend that you use a new electrode, if the electrode efficiency is lower than 80%. Step by Step pH calibration 1. From the MAIN display mode, press the [MODE] key to go to “CAL” screen then press [OK]. 2. If the unit is LOCKED, remove the LOCK display first. 3.
  • Page 17 ionized/distilled water. 12. Place the pH electrode and Temperature probe into buffer 2. 13. Press the [OK] key to start the SLOPE calibration. A “WAIT” message will blink indicating that the instrument is waiting for a stable reading. The display will be locked to the buffer value corresponding to the temperature of buffer 2 (See chapter IX.

  • Page 18: Relay-1, Relay-2, Relay-3, Relay-4 Setting

    OUTPUT. (For detailed explanation see chapter VI. 4-20 mA OUTPUT.) ix. RELAY-1, RELAY-2, RELAY-3, RELAY-4 SETTING This screen is essentially the same for the four relays. Take note of the blinking character as there are 3 values to input for each relay. The user can use [ ], [ ] , [ ]or [OK] keys to input the SET-POINT then the HYSTERISIS and finally the...

  • Page 19: Active "Abs Mv

    key will save the password number and LOCKS the unit. You will not be able change any setting or turn-on the wash relay unless a correct 4-digit number is selected in the PASSWORD CHECK screen. CAUTION: The user is responsible in remembering their password number otherwise you would not be able to calibrate or change the settings.

  • Page 20: Relay 5 (Wash) On Time Setting / Vi. Id Setting

    ii. 4mA SETTING screen This screen will let the user change the 4 mA value. The user can use [ ], [ ] , [ ]or [OK] keys to input new 4mA value. This value is used for scaling the 4-20mA ANALOG OUTPUT. (For detailed explanation see chapter VI.

  • Page 21: Password Setting

    new ON time. You can only turn-ON the WASH relay if the unit is UNLOCKED. vi. ID (RS485 ADDRESS) SETTING This screen selects the unique ID/address for the unit. Your RS485 communication program must also use this same ID/ address to communicate with this unit.

  • Page 22: Offset Setting / Iii. 4Ma Setting

    This screen will let the user select what temperature probe (10KΩ thermistor, Balco 3KΩ resistor or RTD pt-1000) the user will use. This screen will always default to the last temperature probe the user selected. For most application the user will only use one kind of temperature probe so the user don’t need to change this selection once you select the correct temperature probe.

  • Page 23: Relay 5 (Wash) On Time Setting

    This screen will let the user change the 20 mA value. this value is used for scaling the 4-20mA ANALOG OUTPUT. (See chapter VI. 4-20 mA OUTPUT.) v. RELAY-1, RELAY-2, RELAY-3, RELAY-4 SETTING This screen is essentially the same for the four relays. Take note of the blinking character as there are 3 values to input for each relay.

  • Page 24: Password Setting

    viii. PASSWORD SETTING This screen selects the password number for this unit. The user can use [ ], [ ] or [ ] keys to input the new password. Pressing the [OK] key will save the password number and LOCKS the unit. You will not be able change any setting or turn-on the wash relay unless a correct 4-digit number is selected in the PASSWORD CHECK screen.
  • Page 25 Relay Effective RELAY-ON Effective RELAY-OFF Action Set Point Set Point HIGH S.P. S.P. – (H.V) S.P. +(H.V.) S.P. = Relay Set point H.V.= Hysteresis value (Dead Band) If the relay action is set to HIGH, the relay will turn ON at (SET POINT), and will turn OFF at (SET POINT-HYSTERISIS).

  • Page 26: 4-20 Ma Output

    2. The ideal set point range for ABS mV is –2500 to 2500 mV. 3. The ideal set point range of for REL mV is -6499 to 6499 mV. VI. 4 - 20 mA OUTPUT A. ISOLATION VOLTAGE The maximum isolation voltage of the 4-20 mA output is 500 VDC.

  • Page 27: Vii.rs485 Interface Operation

    The analog output is based on the following equation: = 4mA+(16mA)*(D – U ) / (U (output) 20ma Where: = analog output (output) = current bound display = user setting for 4 mA for current bound display = user setting for 20 mA for current bound display 20mA Note: 1.

  • Page 28: Viii.error Displays And Troubleshooting

    ID number) and turned on both the meter(s) and the computer, you are now ready to program a simple routine to read data from the instrument. Read the file "Model 6311 protocol.doc" to understand the implementation in the demo program. VIII. ERROR DISPLAYS AND TROUBLESHOOTING...
  • Page 29 "OVEr" 0.0 ~ 60.0°C pH-Cal pH>16.00. [Use a new buffer solution.] [Replace the electrode.] "OVEr" 0.0 ~ 60.0°C a.pH-Cal-STAND a. Offset>100mV buffer 7.00pH b.pH-Cal-STAND b. Offset>108.3mV buffer 6.86 pH c. pH-Cal-SLOPE c. Slope>ideal mV by 30% [Use a new buffer solution.] [Replace electrode.] "Undr"...

  • Page 30: Ph Buffers

    “EEP” Unit has failed its EEPROM test. “bAd” During power-on [Turn instrument OFF and back to ON again.] [Return for service. (see Warranty)] “rO-“ “bAd” During power-on Unit has failed its ROM test. [Turn instrument OFF and back to ON again.] [Return for service.

  • Page 31: Specifications

    1.67 4.01 6.98 9.46 4.01 7.11 10.32 13.42 1.67 4.00 6.95 9.39 4.01 7.08 10.25 13.21 1.67 4.00 6.92 9.33 4.00 7.06 10.18 13.01 1.67 4.00 6.90 9.28 4.00 7.03 10.12 12.80 1.68 4.00 6.88 9.23 4.00 7.01 10.06 12.64 1.68 4.00 6.86...

  • Page 32: Warranty

    ±100 mV at pH 7.00 pH Electrode Offset recognition +108.3 mV/-91.7 mV at pH 6.86 pH Electrode Slope recognition ±30% at pH 1.68, 4.00, 4.01, 9.18 10.01 & 12.46 Ω Input impedance >10 Calibration end point sensing Temperature Temperature sensor Thermistor :10.00k Ω...

  • Page 33: Xii.keyboard Flowcharts

    If you purchased the item from our Jenco distributors and it is under warranty, please contact them to notify us of the situation.

  • Page 34: B."Abs Mv" Mode

    B. ABSOLUTE mV...
  • Page 36 C. RELATIVE mV Updated : May 28, 2003...

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