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 HANNA
Instruments ....
General guidelines for pH electrode use:
All HANNA electrodes are shipped with a cap that protects the bulb and
junction from damage. The cap must be REMOVED and set aside. Remove
any salt deposits that may have formed on the surface of the electrode
during storage and shipping by thoroughly rinsing
with water. The presence of salt deposits is normal and generally indicates
that the reference junction is open and free-flowing. Verify that the
electrode is connected properly to meter and the meter is powered. During
measurement, always operate the electrode with the fill hole open. This
does not apply to gel and solid filled electrodes which do not have reference
fill hole. During normal use, fill solution will slowly drain out of the junction
located on the side of the electrode; excessive loss (> 2 cm drop within 24
hours) is not normal. Add fill solution daily to maintain a good head
pressure. For optimum reference response, this level should be
maintainedand not be allowed to drop more than 2 cm below fill hole.
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