16
MW160
Bench Meter
6.4. ELECTRODE CARE & MAINTENANCE
Calibrating & Conditioning
Maintaining a pH electrode is critical to ensure proper and reliable measurements. Frequent
two- or three-point calibrations are recommended to ensure accurate and repeatable
results.
Prior to using the electrode for the first time:
1. Remove the protective cap. Do not be alarmed if salt deposits are present, this is
normal. Rinse the electrode with distilled or deionized water.
2. Place the electrode in a beaker containing
MA9016
Cleaning solution for a minimum
of 30 minutes.
Note:
Do not condition a pH electrode in distilled or deionized water as this will
damage the glass membrane.
3. For refillable electrodes, if the refill solution (electrolyte) has dropped more than
2 ½ cm (1”) below the fill hole, add the appropriate electrolyte solution.
4. After conditioning, rinse the sensor with distilled or deionized water.
Note:
To ensure quick response and avoid cross‑contamination, rinse the electrode tip
with the solution to be tested before measurement.
Best practices when handling an electrode:
y
Electrodes should always be rinsed between samples with distilled or deionized water.
y
Do not wipe an electrode as wiping can cause erroneous readings due to static charges.
y
Blot the end of the electrode with lint-free paper.
Storage
To minimize clogging and ensure quick response time, the glass bulb and the junction
should be kept hydrated.
Add a few drops of
MA9015
Storage solution to the protective cap. Replace the storage
cap when the probe is not in use.
Note:
Never store the probe in distilled or deionized water.
Regular Maintenance
y
Inspect the probe. If cracked, replace the probe.
y
Inspect the cable. Cable and insulation must be intact.
y
Connectors should be clean and dry.
y
Rinse off salt deposits with water.
y
Follow storage recommendations.
