Software Overview and Explanations
Installation and Operation Manual – AQUATEC 1000
24
Doc.-ID: AQUA_16012020_EN
4.2.5
O
2
Sensor calibration values
Info
The sensor calibration values can be altered through a 1 or 2 point calibration. Manual entry of values is only
necessary after replacing the O
2
sensor. (The sensor calibration values, "cell constant" and "cell slope" can be
found on the probe test protocol for new probes.)
4.2.6
Time per test gas apply
Here the maximum duration of time for the application of test gas or test air is set. If sensor stability is not reached
within the maximum time, the following error message is displayed: "
O
2
Sensor calibration failed - O
2
sensor
signal instable
" This problem can be offset by setting a longer duration. The factory setting for maximal duration is
10 Minutes. If necessary, the time can be adjusted between 5 minutes and 30 minutes.
4.2.7
Delay time to process
Here the delay time showing the last measured O
2
value from the data storage is frozen after test air or test gas has
been applied (only when "Meas. value hold on cal. is set to on) This value also sets the time for showing the trend
representation on the display after test air or test gas application after a sensor calibration is set.
4.2.8
Automatic Calibration (ACAL)
Automatic calibration enables a cyclic, time-based or remote controlled calibration (using the digital input) of the O
2
sensor. The ACAL can be globally switched on or off and can only be started from the main screen of the display.
When a 2 Point ACAL is set, a test gas bottle must be permanently connected and turned on.
Info
Make sure that the test air and test gas volume and flow settings needed for calibration are correct.
For systems with flow monitoring: The flow rates can be checked under
System Checks
O
2
sensor check
For systems without flow monitoring: Check the flow rates through an external flow meter and adjust to
150 - 180 l/h via an external throttle valve.
4.2.9
Automatic Calibration Settings
Only when the ACAL is switched on, are the ACAL settings visible. The calibration method determines whether the
ACAL is carried out as a 1 point calibration only with test air (instrument air or ambient air) or as a 2 point calibration
with test air and test gas. Ambient air is preset to a fixed O
2
concentration of 20.95% and this value is not shown nor
can it be changed.
The ACAL can be started by:
Time:
Time based start with set intervals in days and the corresponding time
Time + Digital Input:
Same as "Time", additionally a control voltage of 12-24V DC must be applied to the "calibration
release" so that an automatic calibration can be started.
Digital Input:
A control voltage of 12-24V DC must be applied to the "calibration release" so that an automatic
calibration can be started. If the control voltage is still present after the calibration has ended, the calibration will
immediately restart
