Hello, and welcome to Bluelab’s official video
on how to clean and calibrate the Bluelab combo meter. To ensure accurate readings,
the probes to cleaned and calibrated each month. You will need fresh tap water, probe
cleaning instruments, plastic cups, calibration and standard solutions, plus KCL storage solution.
Bluelab pro care kits contain items you will need for cleaning and calibrating your probes.
We’ll start with cleaning the pH probe. Remove the storage cap, grip the base one rotation
clockwise to loosen a little. Slide the cap off. Place the cap upright. fill a plastic
cup with clean tap water. Add a few drops of bluelab pH probe cleaner, gently stir the
probe in the mixture. Ph probes are blown glass and are fragile. When cleaning and calibrating,
always use plastic cups. If the pH probe is heavily contaminated, take a soft toothbrush
and dip in cleaning mixture. Gently clean around the glassware. Immediately rinse the
probe tip thoroughly in clean tap water to remove all traces of cleaning mixture. You’ll
know it’s time to calibrate the pH probe when the Ph cal indicator disappears. Always clean
the probe before calibrating. Calibrate your pH probe to two points for accuracy. Use freshly
poured pH 7.0 and pH 4.0 calibration solutions. Turn the meter on. Place the probe in pH 7.0
solution. Be sure to wait until the reading has stopped moving. Press and hold the pH
button until the display shows C A L. The pH 7 indicator will be displayed. The pH 4
indicator will flash, to let you know pH 4.0 calibration is required. Rinse the probe tip
in clean tap water, and place in pH 4.0 solution. Be patient, and wait for the reading to stop.
Remember, it may take a few minutes. Now press and hold the pH button until C A L appears
on the screen, then release the button. You have successfully calibrated when you see
both calibration indicators on the screen. Rinse the probe in clean tap water. Store
the pH probe when not in use. Always ensure the pH probe tip is wet. If it dries, it dies!
Check that there is enough Bluelab pH pro KCL storage solution in the cap to cover the
probe tip. If not, add KCL solution to ensure the probe tip will be covered. Place the cap
back on the probe. Twist the cap counter-clockwise to secure. Always store the pH probe in KCL
storage solution. Never use RO water, distilled, or de-ionized water. Pure water changes the
chemistry in the probe, causing the probe to die. Cleaning and testing the conductivity
temperature probe needs to be done monthly to remove nutrient buildup and ensure accuracy.
Remove the shroud. Place one or two drops of Bluelab productivity cleaner onto the probe
face with a shammy. Rub the face of the probe firmly and vigorously. Use the other side
of the shammy to rinse the cleaner off the probe face in clean tap water. Give the probe
face a final rinse under clean tap water. Shake dry only. Refit the shroud firmly. Touching
the probe face will contanminate the probe. Test the
probe in a known solution to ensure it is clean. There are many PPM and EC testing solutions
on the market. Use Bluelab solutions with Bluelab products to ensure the highest level
of accuracy. To test, place the probe in freshly poured Bluelab 2.77 EC conductivity standard
solution. Wait a few minutes for it to compensate for temperature. The reading should settle
on 2.7, 2.8, or 2.9 EC. If you have a low reading, clean the probe again and re-test
in fresh solution. Discard all used solutions after calibration. Never put them back in
the bottle, as you will contaminate the solution. Follow the full cleaning procedure for both
probes each month to ensure accurate readings. Recalibration of the pH probe is needed when:
the reading is different than what you were expecting, the batteries have been removed
or changed, the pH probe is replaced with a new one or is disconnected from the meter,
the pH calibration indicators have disappeared, the
pH probe has been cleaned. Thank you for watching! We hope you enjoy your meter. For more tips
on using Bluelab products, visit www.getbluelab.com.