MAGIC 4. FUNCTION/TIMING
Saeco International Group REV.5 SEPT.2004 Page 11/12
4.6. Temperature sensor (KTY 10)
The temperature sensor is a temperature-sensitive resistance mechanism, converting the instantaneous water
heater temperature into an electrical signal which is measurable by the CPU.
The CPU compares this signal with the programmed reference signal and, depending on the outcome of the
comparison, controls the instantaneous water heater output.
The resistance applied has a positive temperature coefficient; i.e. higher instantaneous water heater
temperature - higher sensor resistance.
The table below indicates the trend in resistance values in relation to the temperature.
Measured values:
Temperature
Resistance (Ω)
Resistance trend (Ω)
0 1629 0
15 1845 216
20 1922 77
40 2246 324
90 3168 922
100 3366 198
130 3979 613
140 4188 209
At room temperature the resistance is 1.9KΩ.
Comments: A cold start is possible for the following models (brewing started independently of the current
instantaneous water heater temperature):
Magic Collection old
Magic de luxe1
Magic de luxe 2
4.7. Grinder
The grinder is a conical grinder with upper and lower grinding discs. The grinding level is set by adjusting
the height of the upper grinding disc by means of the screw thread.
If the grinding discs are drawn apart by turning the grinding level adjusting ring (anti-clockwise), the
grinding is coarser, while turning the adjusting ring clockwise will result in a finer grind.
ATTENTION: Adjust the grinding level only when the grinder is in operation!
The grinder operates with a direct current motor and the grinding disc rotation speed is determined by a
gearmotor. The grinder motor operates with a voltage of 260 V.
4.8. Doser
The coffee quantity for the current coffee process is portioned (dosed) in the doser chamber; a higher dose
results in a stronger (more concentrated) coffee. A lower dose results in a weaker (less concentrated coffee).
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