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Checks and Preparation
2.12 Noise Countermeasures
Be sure to connect the chassis GND of the object to be measured.
It may become effective by ensuring 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 GL900'
chassis GND. It will become even more effective if the ground potentials are the same.
Examples of noise countermeasures
If measured values fluctuate due to external noise, the following countermeasures are
recommended.
(Results may differ depending on the noise type.)
Example 1: Connect the GL900's GND to ground.
Example 2: Connect the GL900's GND to the measurement target's GND.
Example 3: In the AMP Settings menu, set Filter to any setting other than OFF.
2-16
Measurement object
Thermocouple
Z
3
Measurement device chassis
GND
GL900
+
R1
Input terminals
–
R2
Z
1
GL900
GND
Vin
Z
2
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