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JENCO 1671 Operation Manual

Dual display benchtop instrument
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OPERATION MANUAL
THE JENCO MODEL 1671
DUAL DISPLAY BENCHTOP
INSTRUMENT
pH - ORP (REDOX) - CONDUCTIVITY
JENCO
ELECTRONICS, LTD.
MANUFACTURER OF PRECISON INS

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Summary of Contents for JENCO 1671

  • Page 1 OPERATION MANUAL THE JENCO MODEL 1671 DUAL DISPLAY BENCHTOP INSTRUMENT pH - ORP (REDOX) - CONDUCTIVITY JENCO ELECTRONICS, LTD. MANUFACTURER OF PRECISON INS...
  • Page 2 GENERAL DESCRIPTION Model 1671 is two instruments in one enclosure with separate inputs, separate displays, and separate millivolt recorder outputs for pH and conductivity. The pH section can also display mV reading for Oxidation Reduction Potential (ORP Redox) and Ion Specific Electrodes (ISE).

  • Page 3: Front Panel Controls And Indicators

    operation is confirmed. FRONT PANEL CONTROLS AND INDICATORS REFER TO FIGURE 1 The left half of the front panel contains the display and the range/ Selector switches for the Conductivity metering function. The ON/OFF toggle switch for the conductivity function located on the rear panel, lower left hand side.(REFER TO FIGURE 2) Must be on in order to utilize the conductivity function.
  • Page 4 function are as following: A) ON/OFF Alternate presses of this membrane switch turn the pH/mV/Temp section on and off. Setup and calibration information will be retained in memory when the instrument is turned off provided that batteries are installed.(REFER TO FIGURE 4) B) CLEAR Resets the microprocessor, clears memory, and momentarily tests all LCD segments.
  • Page 5 measurement when the display is held in the “Autolock” mode...
  • Page 6 BNC ELECTRODE CONNECTOR Connect non temperature compensated pH or ORP/ISE electrode here. ATC PROBE CONNECTOR Suitable for connecting Jenco model 6000A temperature probe when using non temperature compensated (BNC type) pH and ORP electrodes. pH ANALOG OUTPUT CONNECTOR This is a millivolt signal which tracks the pH electrode output within ±...

  • Page 7: Earth Ground Connector

    CELL INPUT CONNECTOR Conductivity cell connector (5-pin DIN). Jenco accessory models 104 or CT200033 are attached here. (SEE LIST OF ACCESSORIES) CONDUCTIVITY ANALOG OUTPUT CONNECTOR High impedance signal suitable for driving chart recorders etc. Voltage output corresponds with conductivity display as 1mV per count.
  • Page 8 this function.
  • Page 10 CALIBRATION / ELECTRODE COMPENSATION-pH WHEN CALIBRATION IS REQUIRED Upon first use of instrument After changing batteries or AC power failure When changing pH electrodes When pH electrode fails to properly measure known buffer Using an electrode that has not been used for a period of time MATERIALS REQUIRED FOR CALIBRATION Actual electrode to be calibrated Buffer solutions 4, 7, and 10...

  • Page 11: Ph Calibration Procedure

    pH CALIBRATION PROCEDURE Prepare the necessary buffers. If Automatic Temperature Compensating electrode is used, correct temperature will be automatically displayed. Otherwise (ATC light is OFF, MAN light is ON), ensure that temperature display matches buffer temperature.. Use DIGIT and COUNT switch to set correct temperature as necessary.
  • Page 12 mV CALIBRATION PROCEDURE The mV and mV-Autolock functions of this instrument are not subject to user “calibration” in the same sense as pH. All pH, ORP, and ISE electrodes produce millivolt signals. In the pH mode, the instrument assumes that the attached electrode is intended for pH.

  • Page 13: Error Codes

    PREPARATION OF KCL CONDUCTIVITY STANDARD SOLUTIONS Carefully measure (in air) 74.55 grams Research Grade Potassium Chloride. Carefully dissolve KCL in sufficient distilled water to make 1.00 liters. Label this as 1.0 normal KCL. Measure 100.0 ml of the 1 normal solution and add sufficient distilled water to make 1.00 liters.

  • Page 14: Specifications

    ERR-1 Cannot calibrate pH 7.00 with this setup, check buffer solution, electrode, cable, connectors. ERR-2 Cannot calibrate pH 4.00 or pH 10.01 with this setup. Check buffer solution, electrode, cable, connectors. ERR-3 Measurement temperature greater than 100.0 or less than 0.0 Correct the error and measure pH again.
  • Page 15 Buffer recognition 4.01, 7.01, 10.01, pH to 60.4 Buffer temperature range Internal, 0.5 steps Buffer temp. comp. table Nominal ± 30% at pH 4 and pH 10 Electrode slope compensation Nominal ± 90mV at pH 7 Electrode offset compensation Electrode calibration Dual point End point sensing Automatic locking...

  • Page 16: Recommended Accessories

    1.3kg, 2.87 lbs RECOMMENDED ACCESSORIES: The following probes are available from Jenco for use with this instrument. Standard cable length is 3 feet. Longer lengths are available on special order. Electrodes listed here are intended for hand-held laboratory applications. Jenco can also supply a complete line of industrial electrodes for permanent mounting in process control and on-line monitoring applications.
  • Page 17 1671. 6000A External Automatic Temperature Compensation. (ATC) for pH/ORP. Use this separate ATC probe if using pH electrodes without internal ATC capability (e. g. Jenco’s 600E series).Otherwise temperature compensation can be accomplished manually by entering the information via the Keyboard.

  • Page 18: 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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