Miele Classic G 4205, Technical Information

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Technical Information
87
G 5xxx
Temperature sensor R30 resistance values
Temperature (°F (°C)) Resistance (k Ω )
32 (0) 35.979
41 (5) 28.519
50 (10) 22.766
59 (15) 18.281
68 (20) 14.774
77 (25) 11.982
86 (30) 9.787
95 (35) 8.048
104 (40) 6.653
113 (45) 5.523
122 (50) 4.608
131 (55) 3.856
140 (60) 3.243
149 (65) 2.745
158 (70) 2.333
167 (75) 1.990
176 (80) 1.704
185 (85) 1.464
194 (90) 1.262
199 (93) 1.157
203 (95) 1.093
Table 050-2: Temperature Sensor R30 Resistance Values
2.15 Turbidity Sensor (ECO Sensor III, Autosensor), B3/10
G 5xxx dishwashers are provided with one of two turbidity sensors,
depending on model. The ECO sensor III measures the turbidity of the water
and, based on this result, the wash blocks, temperatures and running times of
Sensor Wash programs are modified. In addition to this, the Autosensor has
a microprocessor to evaluate the particle measurement.
Principle of operation:
Water circulation and the presence of detergent cause bubbles to be
developed in the suds and measurement technology cannot differentiate
between these bubbles and suspended soil particles. With the turbidity
sensor, a proportion of the suds are directed into a bypass channel which is
wider at one end. This causes the flow rate to reduce and hence the bubbles
in the water to rise. The suspended soil particles in the water can then be
more accurately registered in the following measuring process.
A photoelectric barrier switch (infrared (IR) diode opposite a phototransistor)
acts as a turbidity sensor. Depending on the turbidity (transparency) of the
water, a certain current flows through the phototransistor. This current is
measured and processed by the electronic which then initiates the
appropriate action. If the level of turbidity passes certain thresholds, then,
depending on the soiling detected, subsequent cleaning cycles are modified