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Van London Company
10540 Rockley Road
Houston, TX 77099
USA

(Toll Free) 800-522-7920
(voice) 832-456-6641
(fax) 832-456-6642

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Brief Guide to Troubleshooting Difficult Measurement Problems TEXT SIZE: A A A    PRINT THIS PAGE   EMAIL THIS PAGE

 

COMPONENTS OF THE ELECTRODE SYSTEM

CONTROLLER Perform the checkout procedure as described in the instruction manual.
ELECTRODE Perform an electrode slope check and inspect the electrode for physical damage. Polish, soak, or rebuild the sensing membrane. Monitor the leak rate on the reference side.
 

PROPER CALIBRATION

STANDARD(S) Prepare fresh standards by serial dilution.
pH ADJUSTMENT Adjust pH to operational range of the electrode.
 

SAMPLE VARIABLES

CONCENTRATION RANGE Is the sample out of range?
PRESSURE Is the sample pressure incorrect?
TEMPERATURE Is the sample temperature incorrect?
pH Is the sample pH incorrect?
INTERFERENCES Are there interferences in the sample?
COMPLEXATION Are there complexing agents in the sample?