Sper Scientific 850061 pH SD Card Datalogger Kit - Manual (Page 37)

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MAINTENANCE
pH Probe
It is important to keep the pH probe
wet when not in use. The probe is
protected by a plastic bottle
containing solution. To use or store
the probe:
1. Rotate the bottle to remove the
bottle from the probe. Pull down
the cover and remove it from the
probe.
2. After use, put the cover back on
the probe and plug the probe into
the bottle. Rotate the bottle to fit
into the cover tightly.