Oakton pH/CON 510 series User Manual (English)

Questions and Answers:

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Denise HunterJul 29, 2025
Why is the Oakton pH/CON 510 reading unstable?
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  Raymond Jordan Jr.Jul 29, 2025
  An unstable reading on your Oakton Multimeter can stem from several factors. It could be due to insufficient reference electrolyte in the electrode, which requires you to fill the electrode with reference electrolyte. Alternatively, the electrode might be broken, necessitating a replacement. Electrical field interference from nearby motors or ultrasonic devices can also cause this; try removing or switching off the interfering device. A dirty probe is another possibility; in this case, clean the electrode and hydrate if needed.
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Mr. Timothy Elliott Jr.Aug 2, 2025
What to do if my Oakton pH/CON 510 Multimeter shows nothing when turned on?
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  Lisa HernandezAug 2, 2025
  If your Oakton Multimeter displays nothing when you turn it on, the issue might be that the AC outlet power is not switched on; if so, switch on the power supply. Another possibility is that the AC adapter socket isn't properly inserted; try re-inserting it.
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cortezloriAug 6, 2025
What causes unstable readings on my Oakton pH/CON 510?
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  Jeremy AguilarAug 6, 2025
  Unstable readings on your Oakton Multimeter can be caused by several issues: air bubbles in the cell (tap the cell to remove bubbles), a dirty probe (clean the probe and recalibrate), low conductivity with the solution (avoid atmospheric contact), external noise pickup (move away from the noise), or a broken probe (replace the probe).
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Adam JohnstonAug 10, 2025
How to fix slow response on Oakton pH/CON 510 Multimeter?
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  Dustin MartinAug 11, 2025
  If your Oakton Multimeter is responding slowly, it might be due to a dirty probe. To resolve this, clean the electrode and hydrate if needed.
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Taylor SanchezAug 15, 2025
What to do if Oakton pH/CON 510 Multimeter keypad not responding?
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  rweeksAug 15, 2025
  If your Oakton Multimeter keypad is not responding, first check if the HOLD mode is active (Hold displayed on the LCD). If so, cancel HOLD mode by pressing the Hold button. If HOLD mode is not the issue, there may be an internal program error. Reset all internal programs by removing the A/C adapter from the meter and re-inserting it.
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Ariel PattersonAug 19, 2025
Why does my Oakton pH/CON 510 Multimeter display 'OR'?
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  Michael WaltersAug 19, 2025
  If your Oakton Multimeter displays 'OR' on the upper display, it could be due to a shorted probe, in which case you should test the probe. Alternatively, the probe might be in a solution with too high conductivity for the current range; try using a different solution or selecting a different range.
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Jenna SchwartzAug 25, 2025
Why is the temperature reading erratic on my Oakton pH/CON 510 Multimeter?
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  Veronica LeeAug 25, 2025
  An erratic temperature reading or “OR” on the lower display of your Oakton Multimeter can be caused by oxidation of the temperature probe connector; clean the connector with alcohol. It could also mean the temperature of the solution is out of range; in that case, heat or cool the solution.

Oakton pH/CON 510 series Specifications

General

pH Resolution	0.01 pH
pH Accuracy	±0.01 pH
Conductivity Resolution	0.1 µS/cm; 1 µS/cm; 0.01 mS/cm
Conductivity Accuracy	±1% of full scale
Temperature Compensation	Automatic, 0 to 100°C
Display	LCD
Power Supply	4 x 1.5V AAA batteries
TDS Accuracy	±1% of full scale
Salinity Resolution	0.1 ppm; 1 ppm; 0.01 ppt; 0.1 ppt
Salinity Accuracy	±1% of full scale
Temperature Range	0 to 100°C
Temperature Resolution	0.1°C
Temperature Accuracy	±0.5°C
Operating Temperature	0 to 50°C
Weight	300 g
Conductivity Range	0 to 199.9 µS; 200 to 1999 µS; 2.00 to 19.99 mS
TDS Range	0 to 199.9 ppm; 200 to 1999 ppm
TDS Resolution	1 ppm
Salinity Range	0 to 100 ppt