Setup Set Zero
Setup Set Zero sets a new baseline, or zero, for the C2H4 sensor only. This should be done daily for the C2H4 sensor. To set a new zero, first connect the external conditioning tube filled completely with potassium permanganate (KMnO4) to the inlet and use the “male to male adapter” to connect to the outlet of the F-950. Then use the right arrow to enter Set Zero.
Always allow the instrument adequate time to warm up (3 min) with the KMnO4 attached before setting the zero.
Always store the KMnO4 air tight by connecting the ends of the tubing. Replace the cotton ball filters at either end of the external conditioning tube each time the KMnO4 is replaced (color indicator turns from purple to brown when it expires).
The instrument will run an automated process that sets a new baseline for future measurements. A reminder to use connect the potassium permanganate appears.
Zero C2H4 Sensor
Use KMnO4 filter
C2H4 offset…..1349.1
After the Set Zero routine is finished, it will exit to the Setup menu. Next, verify the set zero calibration by measuring the KMnO4 (0 ppm). Run the set zero calibration again if verification is not successful.
To set zero for CO2 and O2 (every 6 months), you will need to use Controller Software. This process is outlined in the How do I calibrate the instrument? Support section linked on the previous page.