The Bluelab Conductivity Pen is a robust and reliable solution for measuring nutrient concentration and temperature in solution. With the Bluelab...Conductivity Pen, you’ll ensure that your plants are getting the nutrients they need for superior plant health....The Conductivity Pen is factory calibrated and ready to use out of the box. Simply submerge the probe in your nutrient reservoir and take the measurement shown by the LED display.
Bluelab Conductivity Pen
How to calibrate the Bluelab Conductivity Pen
Calibrate the Conductivity Pen if the pen measures incorrectly in EC 2.77 solution
The Bluelab Conductivity Pen comes factory calibrated, so there is no need to calibrate it for the first use out of the box. Calibration is optional, and recommended as a troubleshooting step if the conductivity pen has been cleaned according to the cleaning instructions and is still reading incorrectly in EC 2.77 solution.
If the Conductivity Pen still won't calibrate or read correct measurements after cleaning and calibrating, try using fresh solution and making sure the shroud is fitted correctly.
How to calibrate the Bluelab Conductivity Pen
1. Make sure the pen is clean before calibration. Read the cleaning guide here.
2. Make sure the shroud is fitted correctly.
3. Rinse probe in fresh water and sit the probe in fresh EC 2.77 standard solution.
4. Hold the calibration button for 3 seconds until "CAL" appears. Release button and "CAL P" should be displayed. If "Err" is displayed, check the probe is clean and that the calibration solution is fresh and uncontaminated.
5. A check mark will appear on the screen to indicate that the calibration was successful. The check mark will disappear after 30 days.
FAQ and troubleshooting for the Bluelab Conductivity Pen
Find answers and solutions to common problems
General questions
Why is my conductivity pen reading lower than I expect?
Nutrient solutions, fertilisers and salts can build up on your conductivity probe and cause the Conductivity Pen to read lower than you might expect. We recommend cleaning and testing your pen in EC 2.77 solution at least once every month to remove residue.
Follow the troubleshooting guide below for more on inaccurate readings.
Does the Bluelab Conductivity Pen need calibrating?
Only in some cases. When you first buy your pen, it is factory calibrated. Once you've had your pen for a while, and if, after cleaning, the pen still reads low or high in 2.77 EC Standard Solution, you can calibrate your pen to regain accuracy.
Follow the calibration guide
Troubleshooting guide
Trouble Reason Correction Conductivity pen gives low readings Dirty probe head. The electrodes on the probe head are easily contaminated with oils and greases, for example, from fertilisers and organic nutrients, and even your fingers. Try not to touch the probe head for this reason. Clean and verify in 2.77 EC standard solution Conductivity pen gives high readings Solution could be old or contaminated. Clean and verify unit in 2.77 EC Probe shroud not attached Ensure probe shroud is attached Display does not turn on Battery low Replace battery using the pen battery replacement guide Broken pen Replace the conductivity pen More Troubleshooting
