MCZ - Span Gas, Zero Gas Dampening
The zero and span gas and sometimes the carrier gas as well might have to be set to a defined moisture level in order to obtain reproducible analysis values. To set a defined level of moisture for zero and span gases.
MCZ provides differently dimensioned systems for this purpose; these systems are used to set the rel. gas humidity.
Construction and process depend on use.
MCZ offers two basic options:
- A part of the treated zero air is set to a rel. humidity of 100%. Based on total flow, a program calculates the portion of the dry zero air that has to be replaced by the zero air with 100% rel. humidity in order to set the required humidity level. Mass flow controllers are used by the program to establish this ratio.
- The second option of dampening the gas consists of calculating the absolute water quantity at a specific rel. humidity in relation to the total flow. The calculated water portion is continuously removed from a storage container and added to the gas to be dampened condensation free via an atomizer. A mass flow controller for liquids regulates the required quantity of water.