Sper Scientific 850061 pH SD Card Datalogger Kit - Manual (Page 39)

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MAINTENANCE
inaccurate reading.
•
If the contamination is mineral
matter, put the sensing element in
a 0.1 N HCl solution for 10
minutes. Rinse in distilled water.
•
If the contamination is oil or
grease, clean with a mild
detergent. Rinse in distilled water.
Upon completion of either cleaning
method, immerse the probe in a
saturated buffer solution with pH 4.01
for 15 minutes and rinse with distilled
water. After cleaning, soak the probe
in solution for at least 8 hours.
Probe Performance
The sensing element of an ORP
probe is made of a high purity metal.
Soaking the sensing element in a
solution for a long period of time may
cause slow response time and
inaccurate readings. An oxidation
reduction coating may have formed
on the surface of the sensing