Oasis Aquatics SmartChem, Инструкция по установке и эксплуатации

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Oasis SmartChem - INSTALLATION AND OPERATION MANUAL Page 14 of 22
Probe Cleaning
pH Probe
The cleanliness of the sensor and junction is critical for an accurate measurement. Drift (Offset) and a
slow reading response are often due to an unclean sensor or junction. DO NOT use abrasive materials
to clean the probe. The IH40 is supplied with a white cleaning tool. It can be used instead of the
tissue/cotton detailed below. Simply put some of the cleaning agent in the tool and use this to clean the
membrane.
•
To remove inorganic deposits and scale
o
Soak membrane in dilute HCl for an hour. Wash well with water and condition in 20%
KCl solution before use.
•
To remove solids and organics
o
Wipe the membrane with cotton or tissue soaked in mild non-alkaline detergent. Wash
with water and condition in 20% KCl before use.
•
To remove strongly adsorbed and chemically bonded impurities
o
Use a non-abrasive cleaner such as JifTM undiluted on a soft cloth. Clean the pH
membrane, rinse with water and condition in 20% KCl before use. In the case of protein
contamination use 5% Pepsin in 0.1M HCl solution.
HINT : Calibrate the pH probe regularly. The frequency of calibration will depend on the level of accuracy
desired. When calibrating, always use fresh buffer solution.
ORP Probe
The cleanliness of the sensor and junction is critical for an accurate measurement. Drift (Offset) and a
slow reading response are often due to an unclean sensor or junction. DO NOT use abrasive materials
to clean the probe.
•
To remove inorganic deposits and scale:
o
Soak sensor tip in dilute HCl for an hour. Wash well with water and condition in 20% KCl
before use.
•
To remove solids and organics:
o
Wipe the sensor tip with cotton or tissue soaked in mild non-alkaline detergent. Wash
well with water and condition in 20% KCl before use.
•
To remove plated metals from ORP tips.
o
Soak the tip in approximately 0.1M nitric acid for 15-20 minutes, followed by conditioning
in 20% KCl.
HINT : Clean the electrode periodically. Unclean sensor tips are a very common source of error in ORP
measurements.