Fnirsi 2C23T Manual página 60

11. Amplification circuits with sensors (temperature,
humidity, pressure, Hall, etc.) measurement
Sensor signals are generally relatively weak, about a few millivolts, and
this small signal cannot be directly detected by an oscilloscope. This type
of sensor has a signal amplifier on the motherboard, which can measure
the amplified signal. The 1X gear can be used (both the probe and
①Firstly, set the oscilloscope to Auto trigger mode (default to Auto trigger mode
after startup).
②Set the oscilloscope to 1X position (default to 1X position after startup).
③Set the oscilloscope to DC coupling mode.
④Insert the probe and pull the switch on the probe handle to the 1X position.
⑤Connect the probe clamp to the ground terminal (negative pole of the power
supply) of the sensor motherboard, locate the output terminal of the
amplification section, and connect the probe to this output terminal.
⑥Adjust the vertical sensitivity to the 50mV gear.
⑦Switch to keyboard movement mode and move the yellow arrow horizontally
to the bottom of the waveform.
⑧Adjust the time base to 500mS and enter the large time base slow scan mode.
⑨If the yellow signal line appears at the top, it is necessary to reduce the vertical
sensitivity, which is 100mV, 200mV, 500mV, etc. When the updated signal on
the right is not at the top (usually in the middle), the signal received by this
sensor can be detected at this time.
Gear selection
oscilloscope are set to 1X gear)
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