18 MW150 & MW151 Bench Meters
6.4. ELECTRODE CARE & MAINTENANCE
Calibrating & Conditioning
Maintaining a pH electrode is critical to ensure proper and reliable measurements. Frequent
2- or 3-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 salts 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
2½cm (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 practice 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.
Electrode 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 o salt deposits with water.
y Follow storage recommendations.
To Next Page
Loading...
