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 5 of 21                                                                                           INST.21 

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.  Lift  up  the  stand  at  the  back  of  meter 
for bench top applications if necessary : 

 
 
 
 
 
 
 
 
 
 
 

2.4 

Inserting New Batteries 

 
 

The battery compartment is found at the back of instrument. 
To  open  the  battery  compartment,  push  in  the  direction  of 
arrow  and  lift  up  the  cover.  Note  the  polarity  of  battery 
before  inserting  into  position.  After  replacement,  place 
cover back and press down until it locks tight :  

 
 
 
 
 
 
 
 
 

 

Summary of Contents for MICRO 500

Page 1: ..._ MICRO 500 pH 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 INST 21 ...

Page 2: ...nsor 6 2 7 Switching the Meter On 6 3 CALIBRATION 7 3 1 pH Calibration 7 3 2 Temperature Calibration 9 3 2 1 With Temperature Probe for Preselected Curve 9 3 2 2 With Temperature Probe with Curve Selection 10 3 2 3 Without Temperature Probe no ATC 11 3 3 Millivolt mV Calibration 12 4 MEASUREMENT 13 4 1 Taking Measurements 13 4 2 Holding a Reading 14 4 3 Releasing a Held Reading 14 5 ELECTRODE CARE...

Page 3: ...ent Millivolt measurement mV can be used for taking Redox or ORP Oxidation or Reduction Potential readings with ORP electrodes This instruction manual is organised for quick reference with step by step procedures that give you thorough review of the various features and meter operations Included with your meter are a pH electrode temperature sensor rubber boot 4 x alkaline AAA batteries an instruc...

Page 4: ... pH mV and temperature CAL Allows calibration for pH mV or Temperature or to abort calibration without confirming any set value INC Allows you to increment values during calibration mode HOLD Freezes the measured reading for easy viewing ENTER Confirms calibration value 2 2 Description of LCD Annunciators The meter has a large custom LCD that consists of 3 digit segments and operation annunciators...

Page 5: ...lide in from the top of meter before pushing the bottom edges of meter down to set it into position Lift up the stand at the back of meter for bench top applications if necessary 2 4 Inserting New Batteries The battery compartment is found at the back of instrument To open the battery compartment push in the direction of arrow and lift up the cover Note the polarity of battery before inserting int...

Page 6: ...ector clockwise until it locks Do not force when connecting To remove simply rotate the connector in anti clockwise direction until it unlocks and slide the connector off the socket Insert the mini phono jack of temperature sensor into the socket on the meter Unplug the phono jack when not in use or to measure pH without any temperature compensation 2 7 Switching the Meter On 1 Press ON OFF key to...

Page 7: ...01 to ensure accuracy across the entire range of the meter It also allows offset adjustment in mV and Temperature modes All new calibration values will automatically override existing data It is recommended that you perform at least two point calibration at room temperature using standard buffers starting with pH 7 00 followed by either pH 4 01 or 10 01 For a one point calibration calibration shou...

Page 8: ...atically enter pH measurement mode 2 Dip both electrode and temperature sensor into the buffer solution Swirl gently and wait for reading to stabilise approx 30 seconds 3 Press CAL key to enter calibration mode A CA displays momentarily and the display shows the current uncalibrated reading flashing while in the calibration mode Allow reading to stabilise The meter automatically recognises pH 4 01...

Page 9: ...rve The temperature sensor included with your meter is factory calibrated Over time the temperature calibration may drift and require recalibration If you replace the probe you should calibrate temperature probe prior to pH or mV calibration 1 Connect your temperature probe to the meter Press MODE key to enter Temperature mode until C annunciator appears in the LCD 2 Compare the displayed value to...

Page 10: ...good idea to match the probe to the best curve There are 3 curves programmed in the unit To choose the curve proceed as follows 1 Connect your temperature probe to the meter Dip the probe in a constant temperature bath or a liquid whose temperature can be checked with a thermometer known to be accurate For best accuracy place the probe and thermometer in a constant temperature bath 2 Make sure tha...

Page 11: ...ll scroll to the maximum allowable value and then loop back to the minimum allowable value adjustment maximum adjustment is 5 C from factory default 8 Press ENTER key to confirm calibration The LCD displays CO momentarily and the meter reverts to measurement mode 3 2 3 Without Temperature Probe no ATC If no temperature probe is used the meter compensates for pH response at 25 C factory default or ...

Page 12: ... then loop back to the minimum allowable value adjustment maximum adjustment is 5 C from factory default 5 Press ENTER key to confirm calibration The LCD displays CO momentarily and the meter reverts to measurement mode 3 3 Millivolt mV Calibration mV calibration is performed for ORP or Redox measure ments where you can adjust its mV value as a base value for measurements 1 Press MODE key to enter...

Page 13: ...D displays CO momentarily and the meter reverts to measurement mode and shows the current set value 4 MEASUREMENT 4 1 Taking Measurements 1 Before measurement rinse both pH electrode and temper ature sensor thoroughly with tap or distilled water to remove any impurities stuck onto the electrode body 2 Power on the meter Press MODE key to select your desired mode of operation pH mV or Temperature 3...

Page 14: ... CARE AND MAINTENANCE 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 NEVER use deionised water for storage Wash the probes thoroughly with tap or distill...

Page 15: ...eries not in place a Insert batteries b Re insert batteries in correct polarity LO displays in the LCD a Low battery a Replace batteries with fresh ones Unstable Reading a Electrode not deep enough in sample b Dirty electrode c Broken electrode a Place electrode deeper in sample b Clean electrode and recali brate c Replace electrode Er1 Display a Buffer value out of tolerance a Use new buffer solu...

Page 16: ...lution 0 1 C Accuracy 0 5 C Temperature Compensation Automatic or Manual from 0 to 100 C Millivolt Range 1000 to 1000 mV Resolution 1 mV Accuracy 2 mV Auto Buffer Recognition pH 4 01 7 00 10 01 Hold Function HO Auto Shut Off After 15 minutes Low Battery Indication LO Error Message Display Er1 Display Single Custom LCD Operating Temperature 0 to 50 C Power Requirements 4 x AAA Alkaline Batteries Ba...

Page 17: ... Access Set 9 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 This guarantee excludes accidental damage or damage caused by unauthorised repair or misuse Should repair be necessary please contact our Technical Services Department quoting the serial numbe...

Page 18: ...e will ensure correct pH readings and long electrode life If the electrode is neglected increasingly inaccurate readings will be obtained and a new electrode will soon be required pH electrodes by their very nature have a limited life span It is difficult to predict how often a pH electrode will need to be replaced as this will depend on the nature and frequency of its use and on how well it is ma...

Page 19: ...assium chloride has been added Do not soak the electrode in deionised water 4 Connect the electrode to the pH meter Electrode Calibration Buffering All pH electrodes are inherently unstable over time and for this reason it is essential to calibrate the electrode regularly against buffer solutions of known pH value The calibration procedure is described in the instructions provided with the pH mete...

Page 20: ...If the electrode becomes dirty it can be cleaned by one of the following procedures General Cleaning Soak the electrode in 0 1M hydrochloric acid for one hour Inorganic Deposits Soak the electrode in 0 1M EDTA tetrasodium salt for 15 minutes Oil and Grease Rinse the electrode in methylated spirits or alcohol solution In severe cases the liquid junction may become completely clogged with grease In ...

Page 21: ... electrode with deionised water Low Slope Electrode Will Not Calibrate Meter Cannot be Adjusted to Buffer Solution pH Normally caused by hairline cracks in the glass electrode Replace electrode if this is suspected 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 Stor...

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