Calibration - bluelab Multimedia pHMeter Care And Use Manual

3.0

Calibration

pH calibration is required before first use and then at least monthly to ensure
readings are accurate.
The Bluelab
• The reading is different to what you were expecting.
• The batteries have been removed or changed.
• The Bluelab
Bluelab
• The pH calibration indicators have disappeared.
When calibrating the pH after first use the Bluelab
cleaned. See Leap™ pH Probe cleaning in section 8.0. The Bluelab
does not need to be cleaned for initial calibration unless you have pre-conditioned the
probe in media.
For best pH calibration
pH reading accuracy is dependant on the accuracy and age of the calibration
solutions used, and use and cleanliness of the Bluelab
• Ensure the Bluelab
Probe tip with clean water between calibration solutions to reduce contamination of
the pH solutions.
• Only fresh uncontaminated solutions should be used.
• Calibrate the pH at the same temperature as the solution to be measured.
• ALWAYS calibrate the Bluelab
• If you are changing media (including using new media) you should pre-condition the
probe by inserting it in the media 3-5 times and cleaning before calibrating
The pH calibration involves cleaning the Bluelab
calibrating in TWO SOLUTIONS.
If a reading below pH 7.0 is expected, use pH 7.0 and pH 4.0 calibration solutions.
If a reading above pH 7.0 is expected, use pH 7.0 and pH 10.0 calibration solutions.
Follow the steps below for Multimedia pH Meter calibration.
Storage and use of calibration solutions
• Always place the lid back onto the bottle after use or evaporation will occur rendering
the solution useless.
• DO NOT measure directly into the bottle. Tip a small amount into a clean container
and discard after use.
• Store in a cool place.
• Never add water to solutions.
4
Bluelab
® Leap™ pH Probe should be cleaned and recalibrated when:
Leap™ pH Probe is replaced with a new one or is disconnected from the
®
Multimedia pH Meter.
®
When to calibrate
Solution
Low Abrasive Media
(eg Rockwool, CocoCoir)
Highly Abrasive Media
(eg Soil, potting mix)
Leap™ pH Probe has been cleaned and rinse the Leap™ pH
®
recommend more frequent calibration with high use.
®
®
Light user
(Up to 50 insertions
a week)
Calibrate at least
once a month
Leap™ pH Probe with pH 7.0 then pH 4.0 or pH 10.0.
®
® Leap™ pH Probe tip and then
Leap™ pH Probe needs to be
Leap™ pH Probe
®
Heavy user
(More than 50
insertions a week)
Calibrate at least
once a week
® Leap™ pH Probe tip.