guide_to_troubleshooting
Differences
This shows you the differences between two versions of the page.
| Both sides previous revision Previous revision | |||
|
guide_to_troubleshooting [23/09/2019 07:05] pieter [Guide to troubleshooting for pH/ORP/Ion] |
guide_to_troubleshooting [18/10/2019 07:54] pieter |
||
|---|---|---|---|
| Line 2: | Line 2: | ||
| When a measurement problem arises, it is best to try to locate the cause first. Here's a list of all possible reasons that might cause measurement issues: | When a measurement problem arises, it is best to try to locate the cause first. Here's a list of all possible reasons that might cause measurement issues: | ||
| - | ===== READINGS ARE NOT REPRODUCIBLE | + | ===== Readings are not reproducible |
| * Is there sample carryover? | * Is there sample carryover? | ||
| * Are there sample interferences or complexing agents present? | * Are there sample interferences or complexing agents present? | ||
| * Is the reference electrode junction contaminated? | * Is the reference electrode junction contaminated? | ||
| - | ===== SLOW RESPONSE | + | ===== Slow response |
| * Was the electrode stored in the wrong solution? | * Was the electrode stored in the wrong solution? | ||
| * Was the electrode poisoned by the sample? | * Was the electrode poisoned by the sample? | ||
| - | ===== OUT OF RANGE READING | + | ===== Out of range ===== |
| * Is the electrode plugged into the controller properly? | * Is the electrode plugged into the controller properly? | ||
| * Is there a reference electrode present? | * Is there a reference electrode present? | ||
| Line 17: | Line 17: | ||
| * Is the electrode placed in the sample solution? | * Is the electrode placed in the sample solution? | ||
| - | ===== LOW SLOPE OR NO SLOPE ===== | + | ===== Low slope or no slope ===== |
| * Are the standards too old, contaminated, | * Are the standards too old, contaminated, | ||
| * Has the sample pH been adjusted properly to the operating range of the electrode? | * Has the sample pH been adjusted properly to the operating range of the electrode? | ||
| Line 24: | Line 24: | ||
| * Is there enough fill solution left in the reference electrode? | * Is there enough fill solution left in the reference electrode? | ||
| - | ===== NOISY RESPONSE | + | ===== Noisy response |
| * Is the controller grounded? | * Is the controller grounded? | ||
| * Is there an air bubble on electrode surface? | * Is there an air bubble on electrode surface? | ||
| Line 30: | Line 30: | ||
| * Is there enough fill solution left in the reference electrode? | * Is there enough fill solution left in the reference electrode? | ||
| - | ===== DRIFTY RESPONSE | + | ===== Drifty response |
| * Is there excessive leaking at the reference electrode junction? | * Is there excessive leaking at the reference electrode junction? | ||
| * Is the reference electrode junction clogged? | * Is the reference electrode junction clogged? | ||
| Line 38: | Line 38: | ||
| * Does the sensing membrane need conditioning? | * Does the sensing membrane need conditioning? | ||
| - | ===== INACCURATE READINGS | + | ===== Inaccurate readings |
| * Are the standards incorrect? | * Are the standards incorrect? | ||
| * Was the sample pH adjusted properly? | * Was the sample pH adjusted properly? | ||
guide_to_troubleshooting.txt · Last modified: 18/10/2019 07:54 by pieter
