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User Manual
KS-PH-221-DELUXE |
Portable pH/ORP Meter
Deluxe
Kensington Scientific
22a Cavan Rd, Dry Creek
South Australia, 5094
[email protected]
www.kensingtonscientific.com.au
P
H
E
LECTRODE
C
ARE AND
M
AINTENANCE
Since pH electrode is susceptible to dirt and contamination, clean as necessary depending on the extent and condition
of use.
AFTER MEASURING:
Rinse the pH electrode in distilled water, store the electrode into the electrode storage solution.
CLEANING THE ELECTRODE:
1. Salt deposits: Soak the electrode in warm tap water to dissolve deposits, then thoroughly rinse with distilled water.
2. Oil or Grease film: Wash the electrode bulb gently in some detergents and water. If necessary, using the alcohol to
clean the electrode bulb, then rinse with distilled water. Place the sensor in the electrode storage solution for 30
minutes.
3. Clogged reference junction: Heat a diluted KCl solution to 60 to 80 degrees Celsius. Place the sensing part of the
electrode into the heated solution for about 10 minutes. Allow the electrode to cool in some unheated KCl solution.
4. Protein deposits: Prepare a 1% pepsin solution in 0.1M of HCL. Place the electrode in the solution for 10 minutes.
Rinse the sensor with distilled water.
REACTIVATING THE ELECTRODE:
If stored and cleaned properly, the electrode should be ready for immediate use. However, a dehydrated bulb may
cause sluggish response. To rehydrate the
bulb, immerse the electrode in a pH4.01 buffer solution for 10 to 30 minutes. If this fails, the electrode requires
activation.
1. Soak the pH electrode in 0.1M HCl for 5 minutes.
2. Remove and rinse with deionized water, then place in 0.1M NaOH for 5 minutes.
3. Remove and rinse again, and soak in electrode storage solution for 30 minutes.
ORP ELECTRODE CARE AND MAINTENANCE
1. Ensure that the ORP electrode is thoroughly washed with distilled water after each use.
2. In aggressive chemicals, dirty or viscous solutions, and solutions with heavy metals or proteins, take readings
quickly and rinse electrode immediately after.
3. If you do not use the electrode for long periods, please store the electrode with electrode storage solution.
CLEANING THE ELECTRODE:
Contamination of the sensing element often results in slow response and inaccurate readings. If necessary, clean the
element by one of the following procedures.
INORGANIC DEPOSITS:
1. Soak the ORP electrode in 0.1M HCl for 10 minutes.
2. Remove and rinse with distilled water, then place in alcohol for 5 minutes.
3. Remove and rinse again, and soak in pH4.01 buffer solution for 15 minutes.
O
IL AND
G
REASE
F
ILMS
: