BREWFERM COBRA pH pen Manual
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BREWFERM COBRA pH pen Manual

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COBRA
pH pen
MANUAL

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Summary of Contents for BREWFERM COBRA pH pen

  • Page 1 COBRA pH pen MANUAL...

  • Page 2: Material Supplied

    INTRODUCTION Congratulations on your purchase of the Cobra. Please read the manual completely before first use. Keep the manual for fu- ture reference. It is recommended to soak the electrode for at least 30 minutes be- fore use to make the electrode wet. Features: •...
  • Page 3 To install the batteries: 1. Turn off the meter. 2. Losen the battery cover in clockwise di- rection with a coin (DON’T discard the black washer!). 3. Replace the old batteries with 2 new button cells CR2032. 4. Make sure the batteries are in place and the polarity is correct.

  • Page 4: Lcd Display

    IV. LCD DISPLAY • The 1st display shows the measured pH reading. • The 2nd display shows the temp. • Cal = Calibration mode • ATC = Auto Temp. Compensation • = Data hold KEYPAD VI. HOW TO OPERATE 1. Remove the probe storage bottle from meter to expose the electrode.
  • Page 5 Electrode Rotate the storage bottle in counter-clockwise direction and pull out the bottle completely to expose the electrode. 2. Dip the electrode into the test solution. Press “ ⌽ ” to switch on the meter and stir it to get a stable reading. 3.
  • Page 6 5. Turn off the meter by pressing “ ⌽ ” button. 6. Once you have finished the measure- ment, clean the electrode, put back the bottle and store the meter below 50°C. 7. Please see page 9 for the calibration procedures.
  • Page 7 VIII. AUTOMATIC TEMPERATURE COM- PENSATION (ATC) & TEMP. UNIT SET- TING The Cobra is capable of measuring with Automatic Temperature Compensation. “ATC” will show in the middle top of the LCD. Temp. Unit Setting of the Cobra: To select the temp. unit (°C or °F), turn off the meter first.
  • Page 8 The Cobra Calibration: 1. Switch on the meter. 2. Place the electrode into a 7pH buffer solution (afterwards place the elec- trode into a 4pH or a 10pH buffer solu- tion for better accuracy). 3. Press “ ” to enter pH calibration mode.
  • Page 9 buffer, the buffer pH value (4, 7 or 10) will appear on the display in 2 seconds. CAL ATC If the calibration buffer is not 4,7 or 10, but another value, such as 7.01, just press “ ” to change the value. HOLD 6.

  • Page 10: Maintenance

    MAINTENANCE • Always keep the pH glass bulb wet by using the storage bottle to protect and store the electrode. • Always rinse the pH electrode in de-ion- ised water or rinse solution (e.g. tap water) before the next use. •...

  • Page 11: Specifications

    • LCD display “ - - - ” Out of pH range, too acidic/or too alkaline. • “ H ” or “ L ” Out of temp. range, too cold or too hot. • pH value fluctuate quickly This is normal when the electrode is not immersed in water, but exposed to air.

  • Page 12: Warranty

    • Standard USA buffers • Standard NIST buffers • Standard DIN buffers • Battery Life: >100 hrs continuous use XIII. WARRANTY The meter is warranted to be free from defects in material and workmanship for a period of one year from the date of pur- chase.

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