Concentration curve is the theoretical concentration curve based on RI and temperature. It is defined by a set of 16 parameters, C-parameters.
A concentration curve is specific to the given process medium, for example, sucrose or sodium hydroxide. The set of parameters is given by Vaisala. Do not alter the C-parameters, except if you are changing to another process medium.
The refractometer is able to hold 4 different concentration curves in its memory. The used concentration curve can be switched using the Indigo520 transmitter, Vaisala Insight software, HART, or Modbus RTU write function.
| The primary method for correcting the concentration measurement is field adjustment. However, in some cases the linear field adjustment may not be enough and the C-parameters may require fine-tuning. In this case, contact Vaisala help desk for support. Concentration curve contains also other information besides the C-parameters (for example, measurement unit, valid concentration and temperature ranges, and similar). |
| C00 | C01 | C02 | C03 |
| C10 | C11 | C12 | C13 |
| C20 | C21 | C22 | C23 |
| C30 | C31 | C32 | C33 |