NGA-2000 System Calibration

4.3 Running Single Analyzer Calibration

A single analyzer calibration also needs to switch appropriate system valves.

The difference to the system calibration is that calibration procedure of AM is already running and we have to respond upon this state.

The reaction is possible by watching any change of the LON-variable CALSTAT.

CALSTAT_ZERO (zero calibration in progress):

CALSTAT_SPAN (span calibration in progress):

CALSTAT_DONE (calibration finished):

switch off belonging sample valve and switch on zero valve.

switch off belonging sample valve and switch on span valve appropriate to current state of CRANGE-variable. switch on sample valve and switch off calibration gas valves.

After a calibration command the AM itself is responsible to wait the required purge times until calibration actually is done.

The reaction onto a CALSTAT-change is only active if no system calibration is running.

90003482(2) [NGA-e (MLT-Software 3.2.X)] 07/98

NGA 2000

Supplement - 31