Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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In Dynamic Chamber

1. Unplug sensor connector.
2. Check resistance across sensor terminals.
3. Check that resistance corresponds to these values:

OHMS AIR TEMP.

29.7 - 36.3 25°C / 77°F
3.3 - 3.7 85°C / 185°F

4. As an alternate method, remove sensor. Heat sensor and a thermometer with a lamp.
5. Check that resistance varies according to the table above.
6. If not as specified, replace sensor.