"The electronic within the device is able to govern the output power in a range from 5 Watts to 20 Watts. The power control is independent from the wiring resistance. I.e. it does not matter whether the heater has 0.7 Ohm or 3 Ohms of resistance, the power will always be adjusted to the pre-set value. In case that the resistance check (Fault-codes F1 to F3) is enabled in the extended functions menu, the permitted range for the resistance is 0.7 to 3.1 Ohms up to a power of 15W and 1.0 to 3.0 Ohms from 15.5 to 20W.
Remark: Even when the wiring resistance is outside the nominal and checked range of 0.7-3 Ohms, vaporising is possible in a certain range. For resistances outside the recommended range (or checked range if enabled), full power of 20W (15W respectively) cannot always be achieved. For example, the maximum power of 15W with 0.7 Ohm is reduced to about 10W with 0.3 Ohm. These values were measured on a typical device, but cannot be guaranteed. In case that the requested power can not be transferred to the load, fault F4 indicates the overload condition. After reduction of power and fault acknowledgement, vaporising is possible."