GRAPHTEC GL450 - Noise Countermeasures

2-16
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.
Measurement object
Z 3
GL450
Z 1 Z 2
+
–
Vin
R1
R2
Input terminals
Thermocouple
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.
Measurement device chassis GL450
GND GND
GND PULSE EXT
TRIG