Fine Adjustment: Making the Korallenwächter Even More Precise
After initial calibration, the Korallenwächter can be further refined via fine adjustment — for example by comparing it against an ICP analysis.
What Is Fine Adjustment?
Fine adjustment (formerly: post-calibration) is not a replacement for initial calibration — it is an optional next step. It allows you to fine-tune the device for individual circumstances such as tube length or device positioning, and to align it with an external reference value if needed.
Typical use case: Your Korallenwächter shows KH 7.8 °dKH, your current ICP analysis shows 8.1 °dKH. With fine adjustment you can permanently store this difference.
Fine adjustment is intended for small corrections. If the deviation between the device and reference is very large (more than 0.5–1.0 °dKH for KH), this indicates an installation error or technical problem — please contact support in that case.
How It Works
In the Typus app, you enter two values:
- The current measured value from the Korallenwächter
- A reference value (e.g. from an ICP analysis or certified reference solution)
The app calculates a correction factor from these and applies it to all future measurements. You typically only need to do this once.
Good Reference Sources
| Reference | Suitability | Note |
|---|---|---|
| ICP analysis | Very good | Sample must be taken simultaneously and from the same location |
| Certified reference solution | Good | Direct control without time delay |
| Another test kit | Conditional | Only if that kit is itself calibrated |
When Is Fine Adjustment Worthwhile?
- After initial operation, when you have a reliable reference value
- After changing tubes or other installation changes
- When you consistently observe a small, constant deviation from a trustworthy reference value
What to Expect After Fine Adjustment
Small residual deviations from the target value are normal. Perfect agreement is not a realistic goal — stable, consistent measurements are.
For a meaningful ICP comparison: take the sample for the ICP and simultaneously start a measurement with the Korallenwächter — at the same location in the tank. Deviations of 0.1 °dKH for KH or ±20 mg/l for calcium are normal and do not require adjustment.