INDUSTRIAL GAS ANALYZER FD-311
FORENSICS DETECTORS
TM
FORENSICS DETECTORS
TM
www.forensicsdetectors.com
8
ZERO CALIBRATION
ZeroSet:
ZeroSet should not be used very often - only if for some reason the
baseline zero value of the sensor value is flickering or drifting and does not
maintain a zero value.
Select ZeroSet from the Main Menu Screen
.
Expose to ZERO air for 1 min. Use
fresh air. Maintain a flow of > 0.5L/min to deliver the gas to the detector (i.e. via
the inlet). Use a T-piece. Excess gas should exit from the free parth (see our
YouTube video on calibration for Model FD-311). Then press SAVE button to
confirm the zero value. The value next to the zero value should be ignored (it is
an internal technical value). Then press Save - when complete, a blue floppy disk
icon will appear.
Gas Zero
