CALIBRATION SOLUTION 4.0, 7.0 & 2.76mS

The most common reasons for pH meter error is dry storage of the electrode and electrode contamination. These cause loss of accuracy, reduced performance and slower response times.

Avoid placing pH electrodes in harsh chemicals especially those of high concentration or extreme pH e.g. pH Up. These can damage electrodes or increase the need for electrode maintenance.

Thoroughly clean the electrode after use and always store your pH meter with the cap firmly in place.

Frequency of meter calibration is crucial and will optimize your pH meter’s performance.

Calibration Solution pH 7.0

For calibration of pH Meters at pH 7.0
pH Buffer 7.0 @ 25° C (77° F)
Based on international (APHA) standard formula

Calibration Solution pH 4.0

For calibration of pH Meters at pH 4.0
pH Buffer 4.0 @ 25° C (77° F)
Based on international (APHA) standard formula

Calibration Solution 2.76mS

Conductivity Meter electrodes invariably become coated with inorganic or organic impurities. This causes a loss of accuracy.

Conductivity (cF, mS) or TDS measurements are used to gauge the total concentration of all salts (i.e. both beneficial and toxic) present in the nutrient solution. They cannot provide any detail on the concentrations of individual nutrients.

Therefore, since a ‘satisfactory’ reading does not imply a balanced nutrient mixture (or provide information on the level of nuisance salts), it is wise to dump every 7-14 days. This is particularly necessary when using salty make-up water because such water causes nuisance chemicals to build up rapidly to toxic levels.

For Calibration of Conductivity (EC) and TDS Meters
Calibrates to 2.76mS/cm or cF 27.6 at 25oC (77oF)
Contains Potassium Chloride
Based on international (APHA) standard formula

 

Available in 1L, 500ml & 250ml

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Calibration Solution pH 4.0

Active Ingredients:
Potassium Hydrogen Phthalate

 

Calibration Solution pH 7.0

Active Ingredients:
Potassium DiHydrogen Phosphate
Disodium Hydrogen Phosphate

 

Calibration Solution 2.76mS

Contains Potassium Chloride

Calibration Solution pH 4.0 & Calibration Solution pH 7.0

Rinse electrode in distilled water and gently shake off excess water. Immerse electrode in calibration solution 7.0 for at least 2 minutes then adjust so the meter reads 7.0. Finally, to ensure accuracy, repeat the procedure with calibration solution 4.0 adjusting so the meter reads 4.0.

To prevent contamination of this solution, decant a portion into a smaller container and discard once used.

Never place electrodes in the bottle.

Use sparingly – add drops to nutrient solution a little at a time, stir the solution and continue to test pH levels.

Repeat application until desired pH level is achieved. The quantity required for pH adjustment will vary depending on the nutrient strength and the purity of your water.

Calibration Solution 2.76mS

Rinse electrode in distilled (or de-ionised) water, shake off excess water. Immerse electrode in Conductivity Standard for 5 minutes, then calibrate the meter so that it reads the following:

For conductivity meters – calibrate to 2.76mS/cm or cF27.6

For TDS meters – calibrate to 1800ppm (or as directed)

Once the meter is calibrated it is ready to be used for gauging nutrient concentration. For this consult your nutrient manufacturer for optimum mS / cF (or TDS) that your plants should be grown at.

*Decant a small portion into a small container and discard once used, never return unused solution or place electrodes in this bottle.

Store in a cool dark place.

© 2016 Cyco Platinum Series