DE-OX® ZIP PRO Oxygen analyzer Draft Issue n. 1.2 of 27/02/11 page4
Programming Procedures
Keep the ^ Prog key pressed for more than two seconds, then release the key. On the display will appear “Pr” for
two second in order to advice the start of the programming procedure. It is possible to program:
oAL1 Minimum alarm threshold expressed in % oxygen concentration
oAL2 Maximum alarm threshold expressed in % oxygen concentration
oFSc Value expressed in % oxygen concentration corresponding to the current output full scale value
(20mA). 4mA always correspond to zero % Oxygen concentration.
oO2c Oxygen sensor calibration point
oPress ON/OFF key for going to different pages.
At the end of the of the programming procedure on the display will be displayed “End” and the instrument will
display the oxygen content in the gas mix.
Threshold Alarms Setting
Press the ^ Prog key for more than two seconds, then release the key. On the display will appear “Pr” for two
seconds in order to advice the start of the programming procedure. Then will appear “AL1” for changing the value
of the minimum alarm threshold. The display will show “AL1” and the value of the alarm threshold alternatively.
The blinking digit shows the current cursor position.
Press the ^ Prog key for increasing the value (from 0 to 9).
Press the <Calib key to move the cursor to the next digit.
Press the On/Off key for accepting the value and jumping to AL2 threshold programming page.
Act as for AL1 to modify the AL2 maximum threshold to the desired value. If you want to exclude the minimum
alarm AL1 program it as 00.0. If you want to exclude the maximum alarm AL2 program it as 100.0.
Full Scale Value Setting
After the alarms concentration values setting, the instrument goes to “Fsc” page in order to change the analogic
full scale value of the instrument (if equipped with this feature). This is the Oxygen concentration at 20 mA on the
analogical output. 4 mA is the value at 0% of Oxygen concentration.
It is displayed alternatively “Fsc” and the value of the full scale. The blinking value is the actual changing value.
Press the ^ Prog key for increasing the value (from 0 to 9).
Press the <Calib key for going to the next value.
Press the On/Off key for accepting the value and jumping to the next program page.
Calibration Oxygen value
In this page it is possible to change the calibration point of the instrument. The display will show “O2c” and the
value of the oxygen calibration value alternatively. The blinking digit shows the current cursor position.
Press the ^ Prog key for increasing the value (from 0 to 9).
Press the <Calib key to move the cursor to the next digit.
Press the On/Off key for accepting the value and ending the programming procedures. On the display will appear
for two seconds “End”, then the instrument will show the Oxygen concentration reading.
In this page it is possible to define the oxygen percentage value that allows calibrating the oxygen sensor. This
value depends on the oxygen mix available. Every measure will be made referring to this calibration value. Wrong
calibration means wrong analysis.
Typically the calibration oxygen percentage value is 21,0%, because this value is the oxygen content in air. A
calibration in air is simple and do not need other well known oxygen gas mix.
Warning
The oxygen calibration value will be the same value of calibration set when the instrument is switched
on. During the warm up time if the oxygen percentage of the mixed gas flow is different from the value
of calibration set in the instrument, a failed calibration is obtained and a consequent wrong analysis
value will be read.
