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JENCO 6312 DT Operation Manual

Microcomputer based do/ temperature transmitter & controller
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OPERATION MANUAL
JENCO MODEL 6312 DT
MICROCOMPUTER BASED
DO/ Temperature
TRANSMITTER & CONTROLLER
JENCO INSTRUMENTS, INC.
7968 ARJONS DR., SUITE C
SAN DIEGO, CA 92126
TEL: (858) 578-2828
FAX: (858) 578-2886
E-MAIL:jencosales@jencoi.com
SHANGHAI JENCO ELECTRONICS, LTD.
18 Wangdong zhong Road,Sijing Town,Songjiang,Shanghai,CHINA.
TEL: 86-21-5761-9599
FAX: 86-21-5761-9598
E-MAIL: jencos@jenco.com.cn
Web site:www.jencoi.com ; www.jenco.com.cn
JENCO ELECTRONICS, LTD.
P.O. BOX 161-178, ZhongXiao
NanGang,TaiPei, TAIWAN
TEL: (886-2) 2782-3226
FAX: (886-2) 2782-3234
E-MAIL:jencoe@ms2.hinet.net

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  • Page 1 OPERATION MANUAL JENCO MODEL 6312 DT MICROCOMPUTER BASED DO/ Temperature TRANSMITTER & CONTROLLER JENCO INSTRUMENTS, INC. JENCO ELECTRONICS, LTD. 7968 ARJONS DR., SUITE C P.O. BOX 161-178, ZhongXiao SAN DIEGO, CA 92126 NanGang,TaiPei, TAIWAN TEL: (858) 578-2828 TEL: (886-2) 2782-3226...

  • Page 2: Table Of Contents

    CONTENTS Page INITIAL INSPECTION and ASSEMBLY MOUNTING PROCEDURE GENERAL INTRODUCTION III. USING THE JENCO MODEL 6312DT A. FRONT PANEL B. NORMAL MODE DISPLAY C. REAR CONNECTORS D. TURNING ON/OFF THE INSTRUMENT MODEL 6312DT MODES A. MAIN DISPLAY MODE B. CALIBRATION/SETTING MODE How to use the keys a.

  • 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

    II. GENERAL INTRODUCTION The Jenco Model 6312DT (DO and Temperature) system, is a rugged microprocessor based instrument assembled watertight ¼ DIN case, designed for use in laboratories and process control applications. The model 6312DT microprocessor allows the user to easily recalibrate the parameters for the probes.

  • Page 5: Using The Jenco Model 6312Dt

    III. USING THE JENCO MODEL 6312DT A. FRONT PANEL 1. The [MODE/-] key. 1a. In Normal mode this key will change the DO display to DO %, DO ppb or DO ppm. Calibration/Setting mode this key will move to the next digit of the current active parameter.

  • Page 6: Normal Mode Display

    6. The [ ] LIGHT key. This key will turn on or turn off the backlight of the LCD. The backlight will automatically turn off if there is no key activity for about two minutes. 7. LCD screen. B. NORMAL MODE DISPLAY 1.

  • Page 7: Rear Connectors

    7. H4 (High action relay 4) or L4 (Low action relay 4) annunciator– this is the status of the Temperature Relay 4, if this is displayed then the Relay is ON. H4 means the relay action is HIGH while L4 means the relay action LOW. 8.

  • Page 8: Turning On/Off The Instrument

    CAUTION: MAKE SURE YOU CONNECT THE AC POWER CORD TO THE CORRECT AC TERMINALS. CONNECTING INCORRECTLY MAY DAMAGE THE UNIT PERMANENTLY. D. TURNING ON/OFF THE INSTRUMENT By just plugging the unit to a correct AC voltage the unit will be ready for use.

  • Page 9: Main Display Mode

    A. MAIN DISPLAY MODE Turning ON the unit will always start in main display mode. This instrument is designed to provide 4 distinct measurements: 1. Temperature - current temperature of the solution, which is always displayed 2. Dissolved Oxygen % - a measurement of oxygen in percent saturation.

  • Page 10: How To Use The Keys

    How to use the keys 1. At MAIN DISPLAY you need to press and hold the [CAL/VIEW] key for two seconds to change the display to VIEW SETTING PAGE or if the instrument is password locked the display will be PASSWORD CHECK page. 2.

  • Page 11: Password Check Page

    don’t need to change the current blinking option just press the  ] ENTER key to move to the next selection. a. PASSWORD CHECK page You will only see this page if the unit is password locked. To change any settings or calibration you need to unlock the system to remove the “PASSWORD LOCKED”...

  • Page 12: Do Calibration Page

    NOTE: FROZEN MEANS ALL THE RELAYS AND THE CURRENT OUTPUT WILL MAINTAIN THEIR LAST STATE UNTIL THE USER RETURNS TO MAIN DISPLAY MODE. c. DO CALIBRATION page - ATC TEMP. - The current temperature of the solution. 1.PRESSURE - user changeable pressure value computations.

  • Page 13: Follow These Steps To Do A Standard Calibration

    i. The approximate pressure (in mbar) of the region in which you plan to take your dissolved oxygen measurements. ii. The approximate salinity of the water you will be analyzing. Fresh water has a salinity of approximately zero. Sea water has a salinity of approximately 35 parts per thousand (ppt).

  • Page 14: Follow These Steps To Do A Product Calibration

      the value by using the [MODE/-] ,[ ] UP and [ ] DOWN keys. If you are satisfied with the ppm value, you need to press  the [ ] ENTER key to save the new calibration. If the DO input is within calibration range then the new calibration will be saved and move to the next page, otherwise an error message will be displayed.

  • Page 15: Do Control Setting Page

    d. DO CONTROL SETTING page – 1. RELAY/ mA : User needs to   press ] and [ ] keys to select three units, %/ppb/ppm, for the relay control and current ouput. 1. HI / LO RELAY1 (action) - The action for this relay is changeable, you can choose “HI”-action or “LO”...

  • Page 16: Current Out Setting Page

    e. DO CURRENT OUT SETTING page - 1. DO 4mA OUT – This value will be used in conjunction with 20 mA to plot the current output. (See chapter VI. 4-20 mA OUTPUT.) 2. DO 20mA OUT – This value will be used in conjunction with the 4 mA value to plot the output.

  • Page 17: Controlling The Relays

    CONTROLLING THE RELAYS.) 4. RS 485 ID – this is the unique ID/Address for the unit. If you are connecting multiple model 6312DT or other Jenco models for logging purposes then this ID/Address must be unique for each connected unit. This ID/Address is the same address that must be used by the PC program to communicate with this unit.

  • Page 18: Relay Action, Set Point & Htsteresis

    C.RELAY ACTION, RELAY SETPOINT & HYSTERESIS VALUE Relay Action Effective RELAY- Effective RELAY- ON Set Point OFF 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 19: Temperature Relay

    E. TEMPERATURE RELAY One relay channel is available for temperature display which has independent set point, action (see figure 1) setting ( HIGH or LOW ) and hysteresis value. The action of the Temperature relay is dependent on set point, relay action type (HIGH or LOW), hysteresis value and the current Temperature display.
  • Page 20 The analog output will produce a linear analog output if the user selects this option. The DO analog output will be dependent on the DO_4 mA setting, DO_20 mA setting and the current DO display. The DO & temperature LINEAR analog output is based on the following equation: = 4mA+(16mA)*(D - DO(4)) /(DO(20) - DO(4))

  • Page 21: Rs485 Interface Operation

    VII. RS485 INTERFACE OPERATION A. INTRODUCTION This section assumes you are familiar with the basics of data communication, the RS485 interface, a rudimentary knowledge  and a copy of the more popular Windows ® 9X, XP computer languages capable of using a PC RS485 card or RS232-RS485 converter (third party vendor) module .

  • Page 22: Error Displays And Troubleshooting

    VIII. ERROR DISPLAYS AND TROUBLESHOOTING DISPLAY Possible cause(s) display display unit [Action(s)] "UNDR" a.% or ppm/ppb – a. Temperature >120.0°C. >120.0 °C DO cal [Bring solution lower “OVER” b.% or ppm/ppb - temperature.] DO cal "OVER" "UNDR" % or ppm/ppb-DO Temperature <...

  • Page 23: Specifications

    IX. SPECIFICATIONS Display Range Accuracy Resolution Dissolved O % air-sat 0 to 400.0% ±0.2 % of span 0.1% (meter only) Dissolved Depends ±0.2 % of span 0.001ppm (ppm/ppb) (meter only) 1 ppb Temperature Range Resolution Accuracy -10.0 to 120.0 °C 0.1 °C ±0.1 °C Salinity compensation...
  • Page 24 GENERAL Audio feedback in all keys Keys Security protect 4-digit password Communication RS485 Power: 230VAC(115VAC) 50/60Hz Power consumption 6watts Fuse 315mA/250V fast acting glass tube Ambient temperature range 0.0 to 50.0 °C 128x64 graphic LCD w/ backlight Display: IPT65 ¼ DIN case, depth 148mm Case Weight 950 g...

  • Page 25: Warranty

    If you purchased the item from our Jenco distributors and it is under warranty, please contact them to notify us of the situation. Jenco Service Department alone will determine if the product problem is due to deviations or customer misuse.

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