What would cause the 5500sc AMC analyzer to fail calibration and read Standard 2 near zero?

Document ID

Document ID TE2270

Version

Version 4.0

Status

Status Published

Published Date

Published Date 02/07/2018
Question
What would cause the 5500sc AMC analyzer to fail calibration and read Standard 2 near zero?
Summary
5500sc AMC and calibration failure
Answer
If you’re expecting monochloramine level near the total chlorine, and free ammonia is near zero, then the readings on the analyzer can appear just fine, even when the R3 capillary is clogged.
Problem is, the analyzer will not calibrate and Standard 2 readings will be near zero.
To test if the standard is feeding properly:
1. Go to Diag / Perform Test, press [Enter].
2. The analyzer will ask if you want to interrupt the current sample; select YES and then press [Enter].
3. In the Perform Test menu, go to Cal Sol Delivery / Cell1 / Standard 1, then press [Enter].
4. The display will show "50 seconds" timer; press [Enter].
5. The display will show "Press Enter to Proceed". Open the front panel so you can see the colorimeter drain tubes, then press [Enter].
6. You should see a continuous flow of liquid from the Cell1 (on the left as you view from behind). There will be bubbles in the flow, and it will sometimes appear to flow faster or slower; this is normal. If you see flow though the drain tube, then you may press [Exit] to stop the test.
7. Repeat the above, selecting Cell2.
8. Repeat the above, selecting Standard 2 (for both Cell1 and Cell2).
We may need to look for a kinked or pinched tube, or there may be a faulty valve or other part in the analyzer

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