Service manual

Sample calculations:
Uin = 4.94V, Uout = 4,05V, Rk = 10000 (10K)
Rx = 10000 * (4.94 – 4.05)/4.05 = 2197 ohm
When you are using the additional temperature sensor, you should connect it to the DET3 device according to
the scheme below. The Rx resistor should be in the 2-4k7 range, depending on the sensor’s characteristics.
Attention !
The DET3 device works correctly only with the NTC type temperature sensors!
In order to configure the coolant temperatur sensor, you
should choose the Sensors option from the menu CLT sensor.
In the Rx field you should set the previously calculated Rx
resistor value. The sensor’s characteristics can be chosen from
the list of predefined sensors (Predefined sensors) or by
entering 3 temperature values with appropriate sensor’s
resistance. These values can be found in the service manual of
the vehicle or can be measured (e.g., for 0, 25 and 100 Celcius
degrees). Then, choose the Generate option, which will lead to generating the curve characteristics of the sensor.
The black line on the graph shows the characteristics of the sensor’s resistance, the red line show the voltage
characteristics of the voltage divider. If you insert the incorrect data, the graph won’t show any curves. Then,
you should correct the sensor’s characteristics.
Attention !
The correct sensors’ calibration is the key element of the proper work of the device!
DET 3
Analog In #3 (15)
+5V
Rx
CLT Sensor