Operation
5.8 Calibration
FIDAMAT 6-G
5-18
Operating instructions, 07/2006, A5E00478463
AUTOCAL sequence
Figure 5-15 AUTOCAL / Check sequence
With this subfunction, you can combine several calibration phases to form one Autocal
sequence.
You can arrange the automatic calibration as you wish. It is possible to "compose" a
sequence of up to twelve different phases.
Besides the supply of zero gas and up to four test gases per component, you can also
program flushing with sample gas and sample gas intermediate operation, as well as signal
contact. The signal contact is available to you when you allocated it to a relay output
previously with function 71.
Sample gas intermediate operation
Sample gas intermediate operation can be necessary if the system may only leave
measuring mode for a certain defined time. If the necessary flushing times are greater in
total than the permissible downtime, measuring mode must be returned to between
calibrations.
Signal contact
Use the signal contact to initiate an automatic calibration process of a second device, for
example, or to signalize the beginning or end of an Autocal.
Relay outputs
If you have defined relay outputs for the sample gas, zero gas, test gas and/or
measuring/calibration (function 71), these are used to actuate the corresponding external
solenoid valves. The same applies for the signal 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 test gas 1, after 10 minutes of flushing with test gas
3.
Flushing with sample gas: 8 minutes
4.
Sample gas intermediate operation: 30 minutes
5.
Calibration with test gas 2, after 8 minutes of flushing
6.
Calibration with test gas 3, after 8 minutes of flushing