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