YSI ADV6600 - Manual (Page 141)

Section 10. Care, Maintenance, and Storage
ADV6600
Y S I
Environmental
Page 131
To resurface the probe:
1. First dry the probe tip completely with lens cleaning
tissue.
2. Holding the probe in a vertical position, place one of
the sanding disks under your thumb, and stroke the
probe face in a direction parallel to the gold electrode
(located between the two silver electrodes). The
motion is similar to that used in striking a match.
Usually 10-15 strokes of the sanding disk are
sufficient to remove black deposits on the silver
electrodes. However, in extreme cases, more
sanding may be required to regenerate the original
silver surface.
3. After cleaning, thoroughly rinse the entire tip of the
probe with distilled or deionized water.
4. Install a new membrane.
IMPORTANT: Be sure to: (1) Use only the fine sanding disks provided in the 6035 maintenance
kit in the resurfacing operation and (2) Sand in a direction parallel to the gold electrode. Not
adhering to either of these instructions can seriously damage the electrodes.
10-3.4. pH and pH/ORP Probes
Cleaning is required whenever deposits or contaminants appear on the glass and/or platinum
surfaces of these probes or when the response of the probe becomes slow.
Remove the probe from the sonde. Initially, simply use clean water and a soft clean cloth, lens
cleaning tissue, or cotton swab to remove all foreign material from the glass bulb and/or platinum
button. Use a moistened cotton swab to carefully remove any material that may be blocking the
reference electrode junction of the sensor. Re-install the sensor and re-calibrate.
CAUTION: When using a cotton swab, be careful NOT to wedge the swab tip between the guard
and the glass sensor.
If good pH and/or ORP response is not restored by the above procedure, perform the following
additional procedure:
1. Soak the probe for 10-15 minutes in clean water containing a few drops of commercial
dishwashing liquid.
2. GENTLY clean the glass bulb and platinum button by rubbing with a cotton swab soaked in the
cleaning solution.
3. Rinse the probe in clean water, wipe with a cotton swab saturated with clean water, and rinse
again with clean water.
4. Re-install the sensor and re-calibrate.