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JENCO 3631 Operation Manual

Based ph/orp transmitter
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Operation Manual
MODEL 3631
Microcomputer Based pH/ORP Transmitter
JENCO
ELECTRONICS, LTD.
MANUFACTURER OF PRECISION INSTRUMENTS

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  • Page 1 Operation Manual MODEL 3631 Microcomputer Based pH/ORP Transmitter JENCO ELECTRONICS, LTD. MANUFACTURER OF PRECISION INSTRUMENTS...

  • Page 2: Table Of Contents

    CONTENTS GENERAL INTRODUCTION(((((((((((((((..(((....2 INITIAL INSPECTION((...((((((..............2 USING THE JENCO MODEL 3631((..............3 A. Mounting procedure..................3 B. Front panel....................5 C. LCD screen....................7 D. Rear connectors...................9 E. Measure mode.....................10 F. Setting mode....................11 G. pH calibration mode...................17 H. RmV calibration mode................19 4~20mA output....................20 ERROR DISPLAY AND TROUBLESHOOTING(((((..(((......23 pH BUFFERS(((((..(((................27...

  • Page 3: General Introduction

    GENERAL INTRODUCTION Thank you for selecting the JENCO Model 3631. The 3631 pH/ORP transmitter is a rugged microprocessor based instrument assembled in a watertight 1/8 DIN case, designed for use in laboratories and process control applications. The system displays pH or ORP or Temperature status in one large LCD screen.

  • Page 4: Using The Jenco Model 3631

    USING THE JENCO MODEL 3631 ERVIEW Mounting Procedure Make a cutout on any panel, with a PANEL CUTOUT DIMENSIONS ± 0.61 thickness of 1/16 inch (1.5mm) to 0.00 ± 0.024 0.000 inch (9.5mm). Refer ± ± 0.813 0.032 92.0 3.622"...
  • Page 5 Replace mounting bracket Panel Mounting brackets assembly onto the controller and secure controller mounting panel. Refer DRAWING 3. DRAWING 3 Note 【 】 If the equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired.

  • Page 6: Front Panel

    B. Front Panel The front panel consists of a 4-digit LCD display and 4 keys. 3631 pH/ORP TRANSMITTER MODE STAND SLOPE 7.00 ATC ENTER [ MODE ] key: 1a. In the Measure mode, this key will switch the display in sequence from pH, Temperature, ORP absolute mV, ORP relative mV and back to pH again.
  • Page 7 [ UP ] key: 2a. In the Calibration mode, pressing this key will show the next possible option. In the Setting mode, pressing this key will show the next possible option and increases the numeral increment. 2b. In the Measure mode, pressing this key and [ENTER] key at the same time, the unit will enter the Calibration mode.

  • Page 8: Lcd Screen

    the user to the next setting. C. LCD screen STAND SLOPE 6.86 7.00 ATC MAN Major LCD display. CAL – This icon will be displayed if the meter is in the Calibration/Setting mode. mA – This icon, when displayed, indicate in the 4 mA or 20mA Setting mode. ℃...
  • Page 9 pH – Unit indicator. STAND – This icon will blink before Buffer 1 calibration. The icon will stay on while Buffer 1 is being calibrated. SLOPE – This icon will blink before Buffer 2 calibration. The icon will stay on while Buffer 2 is being calibrated.

  • Page 10: Rear Connectors

    INPUT 100~230VAC Connect the AC line to the rear of the instrument. The model 3631 can be used with 100~240V AC at 50/60 HZ. Make sure the EARTH connector is connected to the earth lead of the AC power line.

  • Page 11: Measure Mode

    V+ (5VDC) and V- (5VDC) output to provide excitation voltage for pH/ORP pre-amplifier only. Note 【 】 (1) Make sure that the power is unplugged before wiring your probes etc. (2) Make sure you connect the AC power cord to the correct AC terminals. Connecting incorrectly may damage the unit permanently.

  • Page 12: Setting Mode

    pH – The degree of acidity or alkalinity of the solution. Temperature – Current temperature of the solution. ORP mV – A measurement of absolute ORP mV. ORP RmV– A measurement of relative ORP mV. The offset value at the RmV calibration will be added to the ORP absolute value to display the ORP relative value.
  • Page 13 +ENTER ENTER ENTER ENTER pH buffer 1 select Pressing [UP] key or [DOWN] key in this screen will cycle the display from 01 (Thermistor: 10k ohm)、02 (Resistor: PT1000)、03 (Manual) modes above. Select the preferred temperature compensation mode, press [ENTER] key to save, and enter the next setting screen.
  • Page 14 Temperature compensation select ENTER 7.00 6.86 ENTER ENTER pH buffer 2 select pH buffer 2 select: Pressing [UP] key or [DOWN] key in this screen will cycle the display from 4.01、 10.01 (or 4.00、9.18) buffer above. Select the preferred buffer, press [ENTER] key to save, and enter the next setting screen.
  • Page 15 Buffer 1 7.00 Buffer 2 6.86 ENTER ENTER 7.00 6.86 6.86 7.00 ENTER ENTER ENTER ENTER mA output parameters select mA output parameters select Note : The pH buffer 2 is either 4.01 or 10.01 if select 7.00 buffer at pH buffer 1 【...
  • Page 16 Buffer 2 select ENTER ENTER ENTER ENTER 4mA output setting Note : The mA output will work with the choice of parameters. 【 】 4 mA output setting: mA output parameters select ENTER ENTER 20mA output setting...
  • Page 17 Pressing [UP] key or [DOWN] key in this screen to adjust the 4 mA value, this value is used for scaling the 4-20mA analog output. Pressing [ENTER] key to save, and enter the next setting screen. 20mA output setting: 4mA output setting ENTER ENTER Measure mode...

  • Page 18: Ph Calibration Mode

    G. pH Calibration mode The model 3631 uses 2-point calibration for pH. The first point must be 6.86/7.00, and the second point can either be 4.00/4.01 or 9.18/ 10.01. In the pH Measure mode, pressing [UP] key and [ENTER] key at the same time to allow the meter to go to the pH Calibration mode.
  • Page 19 icon will flash until the unit detects a stable reading. Once the unit calibrates the first point, the “SLOPE” icon will flash. The unit is ready to be sloped at the second buffer. Buffer 2 (SLOPE) calibration: Buffer 1 calibration ENTER Measure mode 7.00...

  • Page 20: Rmv Calibration Mode

    Then calibrate buffer 1 and buffer 2. H. RmV Calibration mode +ENTER Rmv normal mode The model 3631 uses 1-point calibration for RmV. In the RmV Measure mode, pressing [UP] key and [ENTER] key at the same time, the meter will enter into RmV calibration mode.

  • Page 21: 4~20Ma Output

    Rinse the ORP probe in distilled water and immerse it in the ORP standard solution, then press [UP] or [DOWN] key to adjust the ORP value to that the ORP standard. Press [ENTER] key to save. The unit beeps to indicate a successful calibration. Calibration is now complete and the unit will automatically switch to the ORP relative mV Measure mode.
  • Page 22 The analog output will produce a linear analog output. The user can only bind the ANALOG OUTPUT to one reading at a time. The user can change this anytime by changing option at the Calibration/Setting mode screen. The analog output will be restricted on the 4 mA setting, 20 mA setting and the current bound display.
  • Page 23 The above figure shows the relationship between Reading, U & U 20mA The analog output is based on the following equation: mA(output) = 4mA+(16mA)*(D – U ) / (U20 Where: mA(output) = analog output = current bound display = user setting for 4 mA for current bound display = user setting for 20 mA for current bound display 20mA Note...

  • Page 24: Error Display And Troubleshooting

    ERROR DISPLAY AND TROUBLESHOOTING ERVIEW pH/ORP Temperature Possible cause(s) Display Mode Display Display [Action(s)] "OvEr" -10.0~120.0 pH measure mode pH > 16.00pH °C [Recalibrate] “Undr” -10.0~120.0 pH measure mode pH < -2.00pH °C [Recalibrate] "OvEr" "OvEr" pH measure mode a. Temperature > 120.0°C. [Bring buffer solution to lower temperature.] [Replace temperature probe.]...
  • Page 25 "OvEr" “Undr” pH measure mode a. Temperature < -10.0°C. [Bring buffer solution to higher temperature.] [Replace temperature probe.] b. No temperature sensor. [Adjust the manual temperature to -10~120°C.] "OvEr" Temperature Absolute ORP mV Absolute ORP mV > +1999 mV reading or relative ORP [Bring solution to a lower ORP reading]...
  • Page 26 "OvEr" Absolute ORP mV a. Temperature > 120.0°C. reading or relative ORP [Bring buffer solution to lower temperature.] [Replace temperature probe.] b. No temperature sensor. [Adjust the manual temperature to -10~120°C.] "Uder" Absolute ORP mV a. Temperature < -10.0°C. reading or relative ORP [Bring buffer solution to higher temperature.]...
  • Page 27 "OvEr" 0~60°C a. pH calibration a. Offset < -100 or > 100 mV mode-Buffer (STAND)-7.00 b. pH calibration b. Offset < -91.7 or > 108.3 mV mode-Buffer (STAND)-6.86 c. pH calibration c. Slope > ideal mV by 30% mode-Buffer (SLOPE) [Use a new buffer solution.] [Replace electrode.]...

  • Page 28: Ph Buffers

    pH BUFFERS The temperature characteristics of pH calibration buffers pH4.00, pH4.01, pH6.86, pH7.00, pH9.18 & pH10.01 are stored inside the instrument. The buffers used to calibrate the instrument must exhibit the same temperature characteristics as the stored values. °C 4.00 6.86 9.18 4.01...
  • Page 29 4.03 6.84 9.07 4.03 6.97 9.89 4.04 6.83 9.04 4.04 6.97 9.86 4.06 6.83 9.02 4.06 6.97 9.83 4.07 6.83 8.99 4.08 6.97 9.80 4.09 6.84 8.97 4.10 6.98 9.78 : The actual reading of the instrument can differ from the values shown by Note 【...

  • Page 30: Specifications

    SPECIFICATIONS Mode Range Resolution Accuracy -2.00 to 16.00 pH 0.01 pH ±0.1% ± 1 digit ORP Absolute mV -1999 to 1999 mV 1 mV ±0.1% ± 1 digit ORP Relative mV -2999 to 2999 mV 1 mV ±0.1% ± 1 digit Temperature -10.0 to 120.0 °C 0.1 °C...
  • Page 31 pH Electrode Slope recognition ±30% at pH 4.00, 4.01, 9.18, 10.01  Input impedance >10  Calibration end point sensing Temperature: Temperature sensor Thermistor: 10k ohm at 25 °C, (User selectable) Resistor ( PT1000) or Manual 4-20 mA output: Current output range 4 to 20 mA (isolated) Current output scale user programmable...

  • Page 32: 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.
  • Page 33 For your protection, items must be carefully packed to prevent damage in shipment and insured against possible damage or loss. Jenco will not be responsible for damage resulting from careless or insufficient packing. A fee will be charged on all authorized returns.
  • Page 34 Website: www.jencoi.com Jenco Electronics Inc. 1F., NO. 11, Lane 370, Sec. 6, Zhongxiao E. Rd. Nangang Dist., Taipei, Taiwan TEL: 886-2-2782-3226 FAX: 886-2-2782-3234 Shanghai Jenco Instruments, Ltd. 18 Wang Dong Zhong Road Sijing Town, Songjiang Shanghai, China TEL: 86-021-5761-9599 FAX: 86-021-5761-9598 E-Mail: jencos@jenco.com.cn...
  • Page 35 英文说明书 机型：3631 编制人：汪蕾 日期：2012-03-17 文件编号：K3631-01 修改人：汪蕾 日期：2012-08-27 版本：01 核准人： 日期：...

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