13.
After the ENTER key is pressed, the AV38 will return to the calibration menu. The user has the
option of repeating the procedure if desired. If not, press the ESC key to exit the menus and
return to normal operations.
Thermo Scientific AquaSensors
™
AquaTrace
™
Trace DO System User Guide
19
▲
◄
►
▼
≡
Calibrate
►
Temperature
MENU ESC ENTER
14.
Place the sensor back into the sample chamber and resume process flow through the
AquaTrace system.
5.2 Dissolved Oxygen Calibration – Air Calibration
An air calibration can be performed to update the upper limit of the sensor’s span. As supplied, the
sensor is factory calibrated and this value is stored in the internal electronics, but the operator can
perform this calibration as needed. While it is not necessary, the ambient pressure value in the system
should be updated before performing an air calibration. Failure to do so will result in reduced accuracy of
the calibration and subsequent span calculations. The ambient pressure setting is updated through the
following steps:
1.
Enter the configuration menu on the AV38 Remote Display (see the AV38 user guide for
detailed information on the various menus in the user interface).
2.
Scroll through the available configuration options until the system displays Pressure. Press the
ENTER key to update the ambient pressure.
≡
Configure
►
Pressure
▲
◄
►
MENU ESC ENTER
▼
3.
The AV38 will display the current pressure value for editing. Use the arrow keys to display the
current air pressure in mmHg. When the value is correct, press the ENTER key to continue.
Pressure
(760.0) mmHg
▲
◄
►
MENU ESC ENTER
▼
