Dinspiration

Hi

For OC/SCR calibration of VR3 the calibration gas is always AIR and can not be changed.

To calibrate the VR3 for SCR you will need to switch the VR3 into OC mode and do the calibration as outlined within the manual with air. The Xdec function has no impact on the calibration at all.
After the calibration in air you can connect the O2 cell holder to your SCR breathing loop, Fill it using the bypass valve and the display should give you the correct reading.

Very often the SCR users did not set and activate the correct gas on the VR3. E.g. If you have a SCR and use a NX 50 with the standard flow rates you will have a NX 45 in your breathing loop. This means you have to set the active gas to a NX 45 and this should be the only active gas on your VR3. Xdec and Xfunc will then calculate the cell reading for you decompression and display it as FO2. If you don’t set the active gas near to the calculated FO2, you can get an “X Check” or “Check FO2” message on the display. To set the gas near your calculated FO2 is more important, if you are playing around with different flow rates. E.g. using a NX 40 with the NX 50 dosage etc.


DINspiration