F-940 Instruction Manual rev. 11/26/2019
1554 NE 3
rd
Ave, Camas, WA 98607, USA
73
Phone: (360) 833-8835
www.felixinstruments.com
Replacing the Potassium
Permanganate Filter (KMnO
4
)
The Potassium Permanganate will expire after
prolonged use and can be identified when the
granules turn dark purple to brown. The small
black jar is the KMnO
4
filter, just unscrew the
bottom plate of the F-940 unit after removing
the battery cap, unscrew the filter, screw in the
replacement and you’re done! Screw back into
place the bottom plate and finally the battery
cap.
Содержание F-940
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