User Manual

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22.0 Change the screen backlight and/or contrast
These can be adjusted to best suit the light levels of the environment the pH
controller is being used in.
Backlight can be set at 0%, 25%, 50%, 75% or 100%.
Contrast can be set between 0 and 30.
To change the screen backlight:
Press ‘menu’.
Press ‘∨’ to nd ‘Backlight’. Press ‘enter’.
Press ‘∨’ or ‘∧’ to select the desired value.
Press ‘enter’ to save, then ‘menu’ to exit back
to the main display.
To change the screen contrast:
Press ‘menu’.
Press ‘∨’ to nd ‘Contrast’. Press ‘enter’.
Press ‘∨’ or ‘∧’ to select the desired value.
Press ‘enter’ to save. Press ‘menu’ to exit.
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23.0 Hydrating the pH probe
Hydrate the pH probe in Bluelab pH Probe KCl Storage Solution when:
• the probe tip has not always been stored in KCl storage solution, to improve the
reading response speed.
• the probe tip has been accidentally allowed to dry out.
Never store the pH probe in RO (Reverse Osmosis), De-ionized or Distilled water. Pure water changes the chemistry
in the reference, causing the probe to die.
Clean the pH probe tip. Ensure the probe tip is cleaned
before hydrating. See section 24.0 for instructions.
Add enough Bluelab pH Probe KCl Storage Solution to
a plastic container to submerge the pH probe tip.
Loosen, then remove the storage cap (if required).
Place the pH probe upright in a the KCl solution.
Leave to soak for up to 24 hours. After hydration,
always calibrate the pH probe to ensure accuracy, see
section 13.0.
Bluelab pH
Probe KCl
Storage
Solution
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