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Hello, and welcome to Bluelab's official video on how to clean and calibrate the Bluelab
Guardian monitor. To ensure accurate readings, the probes need to be 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 probe care kits
contain the items you will need for cleaning and calibrating your probes. We'll start by
cleaning the pH probe. Remove the storage cap, grip the base and twist the top 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
pH probe tip in clean tap water to remove all traces of cleaning mixture. You'll know
it's time to calibrate the pH probe when the two green pH LEDs are flashing. Calibrate
your pH probe to two points for accuracy. Use freshly poured pH 7.0 and pH 4.0 calibration
solutions. Ensure the Guardian is on. Place the pH probe in pH 7.0 solution. Be sure to
wait until the reading has stopped moving. Press and hold the pH cal button until the
monitor displays PH and CAL on the top two displays. Release the button. 7 will flash
on the pH display. Then the pH 7.0 indicator light will glow. 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. Press and hold the pH CAL button until Ph and CAL
appear. Release. 4 will flash on the pH display, then the pH 4.0 indicator light will grow.
Rinse the pH probe in clean tap water. You have successfuly calibrated when you see both
calibration indicator lights glowing. Store the pH probe when not in use. always ensure
the pH probe tip is wet. Remember, if it dries it dies. Check that there is enough Bluelab
pH pro KCL sotrage 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 counterclockwise
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 of the pH probe, causing the probe
to die. Cleaning and testing the temperature conductivity probe needs to be done monthly
to remove nutrient buildup and ensure accuracy. Remove the shroud, place one or two drops
of Bluelab conductivity probe cleaner onto the probe face or the shammy. Rub the face
of the probe firmly and vigorously. Use the other side of the shammy to help rinse the
cleaner off the probe face in clean tap water. Give the probe face a final rinse in clean,
running tap water. Shake dry only! Refit the shroud firmly. Touching the probe face with
your fingers will contaminate 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. Never put them back into the bottle, as you will contaminate the solution.
Follow the full cleaning procedures for each probes each month to ensure accurate readings.
Re-calibration of the pH probe mahy be needed when: the reading is different from what you
were expecting, the Guardian monitor is reset to factory default, the pH probe is replaced
with a new one or disconnected from the monitor, the pH indicators are flashing or have disappeared,
the pH probe has been cleaned. For more tips on using Bluelab products, visit www.getbluelab.com.