Oscilloscope measurement
Recording the real signals on the machine: voltages, PWM signals, injector control, sensors and actuators.
Electro
Electronic diagnostics
On a modern machine, the fault is rarely where it shows. We measure the actual signals, read what travels on the data buses, and work back to the cause.
Services
What we measure
Data bus decoding
Reading what travels on the machine's buses, in particular CAN and CAN J1939, with more than 40 decoding protocols available.
Intermittent faults
Poor connections, voltage drops under load and momentary dropouts, which only appear at the precise moment the fault occurs.
Sensors and actuators
Checking the signal at the input and the output, to tell a failed component from a wiring or control fault.
Equipment
Seeing what travels, not just confirming that it communicates
A diagnostic tool reads the fault codes stored by the control unit. It says a component no longer responds, rarely why. The oscilloscope shows the real signal, as it arrives at the connector.
We work with a PicoScope 3416E MSO, which displays several analogue and digital channels at the same time. That is what makes a dropout of a few milliseconds, a voltage drop during a command, or a signal degrading under load visible.
On a data bus the difference is clear: rather than confirming that communication is present, we read the messages exchanged, their timing and their consistency. With more than 40 decoding protocols, this makes it possible to tell a failed control unit from damaged wiring or a sensor reporting a false value.
Fässler Sim-Box
A simulation bench under construction
We are currently building our own test bench, the Fässler Sim-Box: CAN J1939 transmission and reception, outputs from 0 to 24 V, several types of variable resistance and a 4-20 mA output. Driven from the computer with the oscilloscope connected, it can simulate the input or output of any sensor and show the reaction live.
The benefit is twofold: reproducing a fault in the workshop rather than on the customer's machine, and validating the behaviour of a controller before commissioning.