Noise Countermeasures - GRAPHTEC GL450 User Manual

Checks and Preparation

2.13 Noise Countermeasures

Be sure to connect the chassis GND of the object to be measured.
Ensure that the chassis GND wire of the measurement object is connected to a good ground.
Connect the signal chassis GND and the measurement device chassis ground.
Use a short, thick lead to connect the chassis GND of the measurement object to the GL450's
chassis GND. It will be even more effective if the ground potentials are the same.
2-16
Measurement object
Thermocouple
Z
3
Measurement device chassis
GND
GL450
+
R1
Input terminals
–
R2
Z
1
GL450
GND
GND
Vin
Z
2
PULSE EXT
TRIG