Hanna Instruments GROLINE HI981421, Инструкция по эксплуатации

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GENERAL OPERA
TIONS
5.5. ELECTRODE CONDITIONING AND MAINTENANCE
Tiny air bubbles may form inside the pH sensor bulb during transport. The electrode cannot function
properly under these conditions. Remove the bubbles by “shaking down” the electrode as you would
do with a glass thermometer. If the pH bulb and/or junction are dry, soak the probe in
HI70300
Storage solution for at least one hour.
To ensure a quick pH response, the glass bulb and the junction should be kept moist and not allowed
to dry out. Install the probe so it is constantly immersed in the sample.
When not in use, keep the glass hydrated by moistening the small sponge with
HI70300 Storage
solution or HI7082 KCl 3.5M, and replace the protective cap.
IMPORTANT: Rinse the entire probe with tap water and shake excess water off before use. The Storage
solution is extremely conductive and will contaminate standards if not thoroughly removed.
pH bulb cleaning and inspection
1. As preventative maintenance measure, rinse the probe with tap water on a weekly basis.
Inspect probe to ensure solids have not caked around the bulb. A thorough cleaning is advised
to be performed bimonthly. Clean the entire
HI1285‑8 ( HI1285‑9* ) probe in HI700661
Electrode cleaning solution for agriculture.
2. Open the HI700661 sachet. Place the sachet in a beaker to prevent tipping. Place the probe
in the sachet and stir the solution gently. Allow the probe to soak in the sachet for 5 to 15
minutes. Rinse the entire probe thoroughly with water.
3. Shake excess water from the probe.
4. Soak the probe for 1 hour in
HI70300 storage solution. Rinse the entire probe thoroughly with
water after this procedure, as the Storage solution is extremely conductive.
5. Shake excess water from the probe.
6. Recalibrate: place the probe tip into the pH calibration standard. Wait for the reading to
stabilize as the probe equilibrates to the temperature of the solution.
7. If the probe response is slow or does not calibrate correctly, repeat the cleaning procedure.
*For HI1285‑9 the maintenance routine can very depending on specific application requirements and
constraints. If the probe is inline mounted and the maintenance routine can not be easily performed
on a weekly basis, it is recommended to be performed as frequent as the specific application requires
it.
If the probes are used for difficult samples (which can clogg the probe) it is recommended to perform
frequent maintenance routines.
If the probes are used for applications which require high accuracy, it is again recommended to
perform frequent calibrations and cleanings.