Operation
5.4 Operating functions
OXYMAT 64
60
Operating Instructions, 06/2008, A5E00880383-03
You can parameterize the automatic calibration as you wish. It is possible to "compose" a
sequence of up to twelve different phases.
Besides the supply of one zero gas and up to four calibration gases per component, you can
also program flushing with sample gas, sample gas intermediate operation, as well as a
signaling contact. The signaling contact is available if you previously allocated it to a relay
output using function 71.
Sample gas intermediate operation
Sample gas intermediate operation can be necessary if the system may only leave
measuring mode for a certain time. If the necessary flushing times are greater in total than
the permissible downtime, measuring mode must be returned to between calibrations.
Signaling contact
Use the signaling contact to initiate an automatic calibration process of a second device, for
example, or to signal the beginning or end of an Autocal.
Relay outputs
If you have defined relay outputs for the sample gas, zero gas, calibration gases and/or
measuring/calibration (function 71), these are used to activate the corresponding external
solenoid valves. The same applies to the signaling contact "Autocal". This is closed for 1 s
when the command is executed.
Example:
You want to program the following sequence:
1.
Zero gas calibration, after 15 minutes of flushing with zero gas
2.
Calibration with calibration gas 1, after 10 minutes of flushing with calibration gas
3.
Flushing with sample gas: 8 minutes
4.
Sample gas intermediate operation: 30 minutes
5.
Calibration with calibration gas 3, after 1.4 minutes of flushing
The specified Autocal sequence is shown in the following function screens.
Acal/-check sequence O
2
Figure 5-17 Example of Autocal sequence