How to calibrate ph pen. Step one calibrate to ph 4 solution. Once your ph pen is calibrated to ph 4 repeat the process with the ph 7 and ph 10 solutions rinsing the probe. Next put your pen in the solution and see what the reading is on the lcd screen.
Bluelab manage crop health and productivity the easy way. Next pull the pen out of the casing remove the black cap on the end and wash off the node of the ph pen. Ph 4 is usually prompted first followed by ph 7 and ph 10.
The node is the bottom of the pen that is stuck into the water for taking ph readings. In my case i used a shot glass and filled it 34 of the way with the ph 4 buffer solution. Digital pens usually have a calibration setting that will prompt you to submerge the probe end of your ph pen in the different calibration solutions.
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Fill a small container with your buffer solution. You may have to hold your calibration button down for a few seconds. Once washed let it air dry and then you are ready for calibration.
When to calibrate your ph pen. The screwdriver is for turning the dial that adjusts your ph pens reading and the powder will be used to calibrate the pen. Excluding first use you must clean the probe before calibrating.
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