1. Manuals
  2. Brands
  3. jenway Manuals
  4. Measuring Instruments
  5. 3345
  6. Operating manual

jenway 3345 Operating Manual

Ion meter
Hide thumbs
Table of Contents

Advertisement

Quick Links

MODEL 3345
ION METER
OPERATING MANUAL
547 009/REV A/08-99

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the 3345 and is the answer not in the manual?

Questions and answers

Related Manuals for jenway 3345

Summary of Contents for jenway 3345

  • Page 1 MODEL 3345 ION METER OPERATING MANUAL 547 009/REV A/08-99...

  • Page 2: Table Of Contents

    MODEL 3345 ION METER MANUAL SECTION 1 INTRODUCTION Description Specification SECTION 2 INSTALLATION Unpacking Installation Displays Controls Inputs/Outputs SECTION 3 OPERATION Menu Options Common Menu Options Using the unit with 2 sensors Operating the unit with only one display Endpoint detection...
  • Page 3 SECTION 4 MAINTENANCE General Cleaning/Re-conditioning of Glass Electrodes Ion Selective Electrodes SECTION 5 OPTIONAL ACCESSORIES SECTION 6 INTERFACING GLOSSARY OF TERMS 3345/REV A/08-99...

  • Page 4: Description

    INTRODUCTION 1.1 INSTRUMENT DESCRIPTION The Model 3345 Ion Meter is a highly sophisticated product offering a host of valuable features, but retaining simplicity of operation. The structured menus allow easy access to features with single key strokes. On-line help is provided to explain instrument functions and provide diagnostic information.

  • Page 5: Specification

    Calibration reminder with an interval of 1 to 999 hours from last calibration Timed printout with an interval from 1 second to 1 day Display LCD Graphics Power Power Supply 9V a.c. Size 275(l) x 240(w) x 150(d) mm Weight 1.2Kg 3345/REV A/08-99...

  • Page 6: Installation

    SECTION 2 INSTALLATION 2.1 UNPACKING Remove the Model 3345 from the packaging and ensure the items within the package are as ordered. Any shortages or damage should be reported immediately to the Manufacturer or your local Distributor. NOTE: Power Supply 021 033 is supplied with a moulded European plug. If this is not...
  • Page 7 LANGUAGE menu and select the appropriate language by using the arrow keys. Once selected move to the EXIT option and press the key. Pressing the key a second time will return the instrument to the measurement mode. 3345/REV A/08-99...

  • Page 8: Displays

    Units of measurement andcalibration point will also be shown at the side of the main display. REAL TIME CLOCK giving continuous display of hours, minutes and seconds or day, m onth and year. All logged results are automatically time stamped. 3345/REV A/08-99...

  • Page 9: Controls

    To enter a negative exponent this key should be pressed after entering the exponent value - e.g. 1 x 10 - the key sequence is 1, EXP, 3, ± Numeric keys 0 - 9 are used to enter numeric data for measurement parameters, calibration data and limits. 3345/REV A/08-99...

  • Page 10: Inputs/Outputs

    ANALOG OUT 2 x 4mm sockets. Analog output proportional to primary display reading STIRRER Connection socket for optional stirrer POWER IN 2.1 x 5.5mm socket allowing the power supply to be connected to the unit LCD contrast potentiometer 3345/REV A/08-99...

  • Page 11: Operation

    - the help key on this menu option gives access to last calibration details RECALL recall mode for stored readings SETUP used to set up mode specific parameters, instrument and clock set up parameters 3345/REV A/08-99...

  • Page 12: Common Menu Options

    Select ON or OFF option as required and press to confirm. TEMP UNITS Select TEMP UNITS menu using the key and use arrow key or press to highlight options. Select °C or °F option using the keys and press to confirm. 3345/REV A/08-99...
  • Page 13 The value may be adjusted (0-100) using the numeric keys and then pressing to confirm. CAL REMINDER... (refer sub menu) PRINTOUT TIMER... (refer sub menu) CLOCK SETUP... (refer sub menu) 3345/REV A/08-99...
  • Page 14 Select the INTERVAL (HH) menu using the key and use key to highlight options. The value may be adjusted by selecting the required time, in units of 1/10 of an hour (6 minutes) using the numeric keys and then press to confirm. 3345/REV A/08-99...
  • Page 15 1, Sensor 2 or Sensors 1& 2 as required and press to confirm. TIMED PRINT Select TIMED PRINT menu using the key and use arrow key or press to highlight options. Select ON or OFF option as required and press to confirm. 3345/REV A/08-99...
  • Page 16 LOW ALARM (default -2.000) Select LOW ALARM menu using the key and use key to highlight options. The value may be adjusted using the numeric keys and then pressing to confirm. 3345/REV A/08-99...
  • Page 17 DISPLAY Select DISPLAY menu using the key and use arrow key or press to highlight options. Select time, date or none option as required and press to confirm. 3345/REV A/08-99...

  • Page 18: Endpoint Detection

    SUPPRESS option. The value may be adjusted by selecting the required time, in units of seconds (1-999), using the arrow keys and then press The instrument will not show the endpoint symbol until the selected time has elapsed. The time entered is shared time on both channels i.e. it applies to both simultaneously. 3345/REV A/08-99...

  • Page 19: Setting Up Parameters

    Enter pH SETUP menu and select ISOPOTENTIAL. Adjust the reading as required using the numeric keys and press RESOLUTION Enter pH SETUP menu and select RESOLUTION. Select the preferred resolution (0.001, 0.01 or 0.1) from a set of pre-defined options using the arrow keys and press 3345/REV A/08-99...

  • Page 20: Entering Ph Buffer Values

    3.7 ENTERING pH BUFFER VALUES The Model 3345 allows pH buffer values to be entered in two ways - either in pH SETUP or CALIBRATION. Select the pH mode using the arrow keys and press . Move the cursor to highlight the SETUP menu option and press .

  • Page 21: Ph Calibration - Automatic

    If a two point calibration is required the electrode(s) should be rinsed and then placed into the second buffer solution. Allow the reading to stabilise (the endpoint symbol will be displayed) prior to pressing the key. The display will then update to the standard buffer value, corrected for temperature (actual temperature will be displayed). 3345/REV A/08-99...

  • Page 22: Ph Calibration - Manual

    The icon will then change to show the CAL 2 buffer value. If a one point calibration only is required select the EXIT option using the arrow keys and pressing . The instrument will return to the pH mode. 3345/REV A/08-99...

  • Page 23: Error Codes

    This indicates that the slope value is out of range. The error code will be displayed for 3 seconds and will then reset the calibration data back to the ideal Nernst response (0mV @ pH 7, 59.16mV/pH @ 25°C). 3345/REV A/08-99...

  • Page 24: Good Practice Guidelines

    7. During use ensure the electrode is rinsed between each measurement to eliminate contamination of solutions. 8. Ensure that the side port/inlet is uncovered, especially during a long run of tests. 3345/REV A/08-99...

  • Page 25: Setting Up Parameters

    As the electrode ages, becomes contaminated or dirty, these values will drift, indicating that corrective action should be taken. Recording these values as part of a routine Quality Control program can give a good indication of the condition of the electrode. 3345/REV A/08-99...

  • Page 26: Temperature Measurement

    If both sensors fail the instrument will revert to manual temperature measurement. Manual values can be entered via the SETUP and INSTRUMENT SETUP... menus and selecting MAN TEMPERATURE using the arrow keys and pressing . Adjustment is made using the numeric keypad and pressing 3345/REV A/08-99...

  • Page 27: Ion Selective Measurements

    Ionic Strength Adjustment Buffers (ISAB) raise the total ionic strength of the sample and standard solutions to a level which makes initial variation insignificant. Addition of ISAB also improves electrode sensitivity and 3345/REV A/08-99...
  • Page 28 Fluoride slope 1ppm -400 10ppm -459 100ppm -518 Calcium slope 1ppm 100ppm 1000ppm 3345/REV A/08-99...

  • Page 29: Good Practice Guidelines

    ALARM POINTS... used to view and change alarm points for the selected mode and channel INSTRUMENT SETUP... used to select the next set up menu for instrument parameters 3345/REV A/08-99...
  • Page 30 DISPLAY UNITS Enter SETUP manu and select DISPLAY UNITS. Select the required measurement unit (ppm, M, mg/l, Act, none, %) and press DISPLAY FORMAT Enter SETUP menu and select DISPLAY FORMAT. Select the integer or exponential format and press 3345/REV A/08-99...

  • Page 31: Calibration

    3.18 ENTERING CAL BUFFER VALUES The Model 3345 will allow these values to be entered in two ways - either in SETUP or CALIBRATION. Select the CONC mode using the arrow keys and press .
  • Page 32 Rinse electrode(s) and place in the sample. Allow the reading to stabilise (the endpoint symbol will be displayed). Repeat for each sample. At the end of sample measurement re-check the calibration of the instrument using one standard solution. NOTE: Accuracy will be dependent upon the number of calibration points performed. 3345/REV A/08-99...
  • Page 33 However, the volumes of the solutions must be accurately measured. Known Standard or Sample Addition The calculation for this technique has been programmed into the Model 3345. In cases where the composition of the test solution is unknown or complex, the standard addition method is employed.

  • Page 34: Incremental Methods

    Select STANDARD CONC using the arrow key. Press . The value will now be highlighted. Adjust the reading as required using the numeric keys. If a mistake is made the key can be used as a delete key, 3345/REV A/08-99...
  • Page 35 . The measurement sequence will commence as before. Selecting STORE will allow the displayed reading to be stored. On completion of measurements selecting EXIT and pressing will return the instrument to the CONC menu. 3345/REV A/08-99...

  • Page 36: Multiple Sample Addition/Subtraction

    Select NUMBER OF SAMPLES using the arrow key. Press . Enter the number of samples using the numeric keys and press . It is recommended that for optimum accuracy of readings only four samples be measured at one time. 3345/REV A/08-99...
  • Page 37 The display will now give a reading and the second icon will flash to indicate that a measurement is in progress. Pressing CONTINUE... again and the key will cause the third icon to flash, requesting that the addition of sample 1 is required. 3345/REV A/08-99...

  • Page 38: Operating The Instrument With Optional Stirrer

    3.22 OPERATING THE INSTRUMENT WITH OPTIONAL STIRRER The Model 3345 may be used with the optional bench and overhead stirrers. The stirrer should be connected to the instrument via the rear panel socket. Stirrer speed can be set by entering the SETUP and INSTRUMENT SETUP modes using the arrow keys and pressing .

  • Page 39: Datalogging

    ABORT option. If it is necessary to store the reading the location will have to be selected within the index option using the arrow keys. NOTE: Storing a reading when the memory is full will overwrite any previous data stored in the selected location. 3345/REV A/08-99...
  • Page 40 DELETING... The display will then update to show the message ALL RECORDS DELETED. Selecting the EXIT option and pressing will return the instrument to the previous display. DOWNLOADING STORED READINGS To download or print stored readings press the key from within the RECALL mode. 3345/REV A/08-99...
  • Page 41 Continue moving across the parameter until full adjustment has been made. to confirm new time or date press or press the key until the selected parameter is re-highlighted. 3345/REV A/08-99...
  • Page 42 Refer to the Instruction Sheet supplied with the electrode. SECTION 5 OPTIONAL ACCESSORIES A wide range of optional accessories and electrodes are available for use with the Model 3345. Please consult your local Distributor or manufacturer for a full list. 3345/REV A/08-99...
  • Page 43 SECTION 6 INTERFACING Analog Outputs The Model 3345 has 3 analog outputs - one is proportional to the current primary displayed reading - the other two are buffered electrode potential outputs. Analog Output Proportional to Displayed Reading The voltage is proportional to the displayed primary reading. In mV mode there is a direct relationship i.e.
  • Page 44 Pressing the PRINT key outputs from the RS232 interface. Sending an ASCII “D” to the 3345 causes a printout of the current displayed reading plus sample number. Sending an ASCII “C” causes a printout of the last calibration parameters (same as printout after performing a calibration).
  • Page 45 ALARM CONNECTIONS Each sensor channel has independant alarms. When a reading goes outside the alarm limits, the 3345 acti- vates an open collector transistor alarm output to indicate that a low or high alarm limit has been exceeded. Each transistor can sink up to 0.5A. The maximum no load voltage for each transistor is 50V dc.
  • Page 46 Quantifies the ability of a solution to resist pH change when subject to the addition of strong acid or base. BASE A substance which dissolves in water with the formation of hydroxyl ions and reacts with acids to form salts. Has a pH >7. 3345/REV A/08-99...
  • Page 47 The filling solution is saturated with silver chloride to prevent erosion of the internal reference ele ment. Reference filling solution is a concentrated salt solution contacting the sample solution and the internal reference element. 3345/REV A/08-99...
  • Page 48 A point at which the potential developed by an electrode is not influenced by temperature. For a normal glass pH electrode this potential will be close to 7pH. Temperature effects are greater the further the level of the sample is from the isopotential point (see ATC and Temperature Effects). 3345/REV A/08-99...
  • Page 49 Ai is the activity of the ion to which the electrode is responding. At T=25°C, E is equal to 59.16mV when n=1. NOISE Random and rapid changes in displayed electrode potential. This is often due to the pick-up of strong static charges or electromagnetic interference from adjacent equipment. 3345/REV A/08-99...
  • Page 50 It should not be easily polarised, possess no temperature hysteresis and a small temperature coefficient. RELATIVE MILLIVOLTS A mode in which the actual sensor potential can be displayed. Can be modified to enable a reading to be taken which is relative to some specific point in a measurement cycle. 3345/REV A/08-99...
  • Page 51 Typically an S-shaped curve of electrode potential against titrant volume is obtained; the equivalent point is at the steepest point of the curve. The technique may be used to directly measure a sample species or indirectly determine an ion not directly sensed by the electrode. 3345/REV A/08-99...

  • Page 52: Ec Declaration Of Conformity

    EC Declaration of Conformity JENWAY Model 3345 Ion Meter complies with the following European Standards: EN 50081-1:1992 Electromagnetic compatibility - Generic emission standard EN 50082-1:1992 Electromagnetic compatibility - Generic immunity standard (Performance criterion B)
  • Page 53 Thank you for reading this data sheet. Please contact us for a quotation: Head Office (UK) Switzerland Office P.O. Box 2124 Zugerstrasse 46 Chelmsford 6314 Unterägeri Essex CM1 3UP England Switzerland Tel: +44 (0)1245 600 560 Tel: +41 41 541 5877 Fax: +44 (0)1245 600 030 Fax: +41 41 541 5878 Email:...

Table of Contents