TPS Aqua-pH - User Manual

Questions and Answers

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Carlos AndersonAug 19, 2025
Why does my TPS Measuring Instruments display OFF and switch off?
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  Sierra CooperSep 12, 2025
  If your TPS Measuring Instruments displays the word 'OFF' and then switches off, it means the battery voltage has dropped below 6.00 volts. To fix this, replace the battery.
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Wendy DiazAug 21, 2025
What to do if my TPS Measuring Instruments will not turn on?
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  samanthanelsonAug 21, 2025
  If your TPS Measuring Instruments won't turn on, the battery is likely exhausted. Replacing the battery should solve the problem.
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corteznicoleAug 23, 2025
What does the flashing symbol mean on my TPS Measuring Instruments?
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  Yvette BrownAug 23, 2025
  If your TPS Measuring Instruments shows a flashing symbol, it indicates that the battery is below 7.50 volts. Replace the battery soon. The unit will automatically switch off when the battery level falls below 6.00 volts.
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Chad BeanAug 27, 2025
Why are the readings inaccurate on my TPS Measuring Instruments even after calibration?
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  thomasphillipsAug 28, 2025
  If your TPS Measuring Instruments shows inaccurate readings even after successful calibration, the reference junction is likely blocked. Clean the reference junction according to the instructions supplied with the sensor to resolve this.
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jasonfullerAug 29, 2025
Why does the 2 point calibration fail on my TPS Measuring Instruments (slope less than 85.0%)?
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  Susan GrahamAug 29, 2025
  If a 2-point calibration fails on your TPS Measuring Instruments because the slope is less than 85.0%, it could be due to several reasons: 1. Using an incorrect primary buffer. 2. The glass bulb is not clean. 3. The sensor is aged. 4. The connector is damp. 5. The buffers are inaccurate. To solve this: * Ensure you are using the buffers that the Aqua-pH has been set to automatically recognize. * Clean the glass bulb as per the instructions supplied with the sensor. * Attempt rejuvenation as per the instructions supplied with the sensor. Replace the sensor if rejuvenation is unsuccessful. * Dry the connector in a warm place. * Replace the buffers.
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cathybergAug 31, 2025
Why does the 1 point calibration fail on my TPS Measuring Instruments (asymmetry greater than +/- 1.00 pH)?
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  April JohnsonSep 1, 2025
  If a 1 Point calibration fails on your TPS Measuring Instruments (Asymmetry is greater than +/- 1.00 pH), it is likely due to a blocked reference junction or contaminated reference electrolyte. Clean the reference junction as per the instructions supplied with the sensor, flush with distilled water, and replace the electrolyte.
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April GraySep 3, 2025
Why does my TPS Measuring Instruments display 7.00 for all solutions?
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  Meghan MillerSep 3, 2025
  If your TPS Measuring Instruments displays 7.00 for all solutions, there is likely an electrical short in the connector. Check the connector and replace it if necessary. If the problem persists, replace the sensor.
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hjuarezSep 5, 2025
Why does my TPS Measuring Instruments display 4-5 pH for all solutions?
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  Christopher JacobsonSep 5, 2025
  If your TPS Measuring Instruments displays 4-5 pH for all solutions, the glass bulb or internal stem is likely cracked. The solution is to replace the sensor.
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Karen HallSep 7, 2025
What to do if my TPS Measuring Instruments fails to calibrate, even with a new sensor?
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  ramosvirginiaSep 7, 2025
  If your TPS Measuring Instruments fails to calibrate, even with a new sensor, the calibration settings are likely outside of allowable limits due to a previous failed calibration. Initialise the unit.
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John PonceSep 9, 2025
Why does my TPS Measuring Instruments display “OVRoC” when the sensor is plugged in?
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  Dr. Sandra WilliamsSep 9, 2025
  If your TPS Measuring Instruments displays “OVRoC” when the sensor is plugged in, it indicates either a faulty sensor or a faulty instrument. Try fitting a new sensor, part number 121247. If the issue persists, return the instrument to the factory for repair.