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palintest MICRO 500 Operating Instructions Manual

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INSTRUMENTS
_____________________________________________________________________________________
MICRO 500
pH METER
_________________________________________________________________________
PALINTEST LTD, Palintest House, Team Valley, Gateshead, Tyne & Wear England NE11 0NS
Tel: 0191 491 0808
1 of 21
®

OPERATING INSTRUCTIONS

PT 140 MICRO 500 pH METER
Fax: 0191 482 5372
(pH/mV/Temp Meter)
E-Mail: palintest@palintest.com
INST.21
INST.21

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  • Page 1: Operating Instructions

    METER OPERATING INSTRUCTIONS PT 140 MICRO 500 pH METER (pH/mV/Temp Meter) _________________________________________________________________________ PALINTEST LTD, Palintest House, Team Valley, Gateshead, Tyne & Wear England NE11 0NS Tel: 0191 491 0808 Fax: 0191 482 5372 E-Mail: palintest@palintest.com 1 of 21 INST.21...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS INTRODUCTION............... 3 Introducing the Micro 500 pH Meter .......... 3 GETTING STARTED..............4 Description of Keypad Functions ..........4 Description of LCD Annunciators..........4 Inserting & Removing the Rubber Boot ........5 Inserting New Batteries ............. 5 Battery Replacement ..............

  • Page 3: Introduction

    LCD (Liquid Crystal Display) for clear and easy reading. The Micro 500 pH meter allows pH, temperature (° C) and millivolt measurement. Millivolt measurement (mV) can be used for taking Redox or ORP (Oxidation or Reduction Potential) readings with ORP electrodes.

  • Page 4: Getting Started

    GETTING STARTED 2.1 Description of Keypad Functions The Palintest Micro 500 pH meter has four keys on its splash-proof keypad. These include ON/OFF, HOLD/ ENTER, CAL and MODE/INC keys. ON/OFF: Powers the meter on and turns it off. Meter directly enters measurement mode when you switch it on.

  • Page 5: Inserting & Removing The Rubber Boot

    2.3 Inserting & Removing the Rubber Boot To remove meter from rubber boot, push out from the bottom edges of meter until it is completely out of boot. Ensure that the cables of pH electrode or temperature probe are not connected. To insert meter into rubber boot, slide in from the top of meter before pushing the bottom edges of meter down to set it into position.

  • Page 6: Battery Replacement

    2.5 Battery Replacement A ‘LO’ annunciator in the LCD alerts you when battery power is running low. Replace batteries as soon as possible after ‘LO’ symbol appears : 7.00 Caution: Power off the meter when changing battery. 2.6 Connecting the Electrode and Temperature Sensor To connect electrode into meter, align the connector slots with the posts of meter’s socket and rotate connector clockwise until it locks.

  • Page 7: Calibration

    Ensure that you use fresh pH buffer solutions during calibration. Do not re-use buffer solutions as they may be contaminated and affect the calibration and accuracy of measurements. Palintest Buffer Packs provide single-use buffer solutions from easy to use buffer tablets (see Accessories Section).
  • Page 8 Before use, remove the plastic protective cap of pH electrode and condition the glass bulb by soaking it in tap water for 1 - 2 hours. This hydrates the glass bulb if electrode is too dry or has not been used for a long period of time. Always rinse the probes with tap water or rinse solution before and after each calibration/sample measurement to avoid cross-contamination.

  • Page 9: Temperature Calibration

    For 2 or 3-point calibration, repeat with pH buffers 4.01 and /or 10.01 for best accuracy. Important: This meter has automatic buffer recognition which identifies the correct pH buffer values during calibration. If buffers other than pH 4.01, 7.00 or 10.01 are used, or the electrode has worn out, the LCD will flash ‘Er1’.

  • Page 10: With Temperature Probe With Curve Selection

    Press INC key until the displays shows the correct temperature. The INC key will scroll to the maximum allowable value and then loop back to the minimum allowable value adjustment (maximum adjustment is ± 5° C from factory default). Press ENTER key to confirm calibration. The LCD displays ‘CO’...

  • Page 11: Without Temperature Probe (No Atc)

    Press ENTER key and the curve selection is complete. The unit will now display the temperature with respect to the curve selected. To match the value exactly with the standard value, press CAL key to enter temperature calibration mode. The LCD shows ‘CA’...

  • Page 12: Millivolt (Mv) Calibration

    Press CAL key to enter temperature calibration mode. The LCD shows ‘CA’ momentarily and the displayed reading flashes. Note that this displayed value should either be 25.0° C or last set temperature value : 25.0 Press INC key until the displays shows the correct temperature.

  • Page 13: Measurement

    Use the INC key to adjust the reading to your desired value. The maximum adjustment you can make is ± 50 mV. Pressing INC key continuously allows you to scroll to the maximum allowable value and then loops back to the minimum allowable value.

  • Page 14: Holding A Reading

    For best results, always keep the pH electrode bulb wet. Store the pH bulb with electrode storage solution. Electrode storage solution is available as part of the Palintest Electrode Care Pack (see Accessories Section). If electrode storage solution is not available, use tap water or buffer solution.

  • Page 15: Troubleshooting

    Clean the electrode in a mild detergent solution. Wipe the probe with a soft tissue paper. Avoid touching the glass membrane with your fingers. Wash thoroughly in tap water and then in distilled water. Recalibrate the meter after cleaning the electrode. TROUBLESHOOTING Problem Cause...

  • Page 16: Specifications

    SPECIFICATIONS Palintest Micro 500 pH Meter pH Range 0.00 to 14.00 pH Resolution 0.01 pH Accuracy ± 0.01 pH Slope Range 80 to 120% No of Calibration Points 1 to 3 points (push-button) Buffer Options pH 4.01, 7.00, 10.01 Temperature Range 0.0 to 100.0°...

  • Page 17: Accessories

    PT 105/12 Soil pH Access Set WARRANTY The Palintest Micro 500 pH Meter is guaranteed for a period of one year from date of purchase - its associated pH electrode is guaranteed for a period of six months from date of purchase.

  • Page 18: Appendix (Electrodes And Electrode Care)

    The porous ‘liquid junction’ provides continuity between the electrode and the test solution. Palintest Electrodes are normally of a sealed liquid or gel type which do not require refilling.
  • Page 19 For highly accurate work it may be necessary to calibrate the meter each time it is used. Palintest Buffer tablets provide a simple means of making up buffer solutions for electrode calibration. The use of these tablets is described on a separate leaflet (INST.7).
  • Page 20 Do not leave the electrode standing in deionised water. For long-term storage of more than one week, replace the electrode tip in the protective bottle cap, the bottle cap should contain Palintest Electrode Storage Solution. When returning the electrode to use prepare it as for a new electrode.
  • Page 21 Slow Response (Long Time to Steady Readings/Excessive Drift) - Clean electrode thoroughly as described earlier. Allow the electrode to stand for at least one hour in Palintest Electrode Storage Solution. If no improvement in electrode performance is obtained, replace electrode.

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