Campbell Scientific CS526 ISFET pH Probe - Manual (Page 20)

CS526 ISFET pH Probe
9.1.2.1 Cleaning Tips
• To avoid scratches on the sensor surface, rinse the probe thoroughly using
water before cleaning the probe with the soft brush supplied with the meter
and tap water with a mild detergent added. Most scratches on the sensor
are caused when there are hard particles in the sample and the sample is
rubbed into the sensor when cleaning with the toothbrush.
• Proteins, fats, and oils may be removed by scrubbing in a solution of Terg-
A-Zyme (Alconox company), a pepsin solution, or a similar product.
Afterwards, rinse thoroughly with deionized or distilled water.
• Do not use hydrofluoric acid, acetone, MEK, or similar agents to clean the
probe.
9.1.3 Revitalizing
Revitalization is performed to regenerate the diaphragm in the pH probe. For
best results, clean the probe first as described in Section 9.1.2, Cleaning
Procedure, before revitalizing.
1. Make sure the probe is warm (around 60°C).
2. Place the probe directly (without flushing it with deionized water or
cooling it down) in a saturated KCl-solution (pn 16349) at room
temperature and keep it in the solution for 20 minutes.
This cold KCl-dip will regenerate the reference system and the diaphragm.
9.2 Storage
9.2.1 Short-Term Storage (2 days or less)
1. Clean the probe first with water and possibly a mild detergent.
2. Place it in a clean container with fresh pH7 buffer solution (pn 25586) to
prevent contamination of the probe directly after cleaning.
9.2.2 Long-Term Storage (more than 2 days)
1. Clean the probe first with water and possibly a mild detergent.
2. Place one drop of demi-water in the probe’s protective cap.
3. Place the protective cap on the probe tip.
Always revitalize and recalibrate the probe before using it
again after long term storage (see Section 9.1.3,
Revitalizing, and Appendix C, Calibration).
CAUTION
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