Auto Calibration Setup

The automatic calibration feature allows the instrument to calibrate itself using external supplies of zero and span calibration gases at pre-determined intervals or events as dictated by the user.  The first step when setting up the automatic calibration feature on the MZA 6010 is to connect the Zero and Span calibration gases to the appropriate ports on the left side of the enclosure.  There are blocking solenoids at each of these ports to only allow the flow of gas when it is called for and to prevent the flow when not needed.  The pressure in the gas lines will need to be adjusted to maintain a flow rate similar to the sample flow rate, which should be between 20 and 50psi.

 

Automatic calibrations based on timed intervals

The interval between calibrations is determined on the Auto Calibration Setup screen.  Auto Calibration must be set to “On”.  The calibration purge timer allows for the flow of calibration gas to purge the sample gas from the instrument before performing a calibration.  If the sample lines are long the time can be increased from the default value of 90 seconds.

The zero and span intervals are measured in hours.  The appropriate interval can be based on the process and the desired degree of accuracy.  The standard values are 48 hours for a zero calibration and 96 hours for a span calibration.