GRAPHTEC miid LOGGER GL860 - Noise Countermeasures

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CHAPTER 2 Checks and Preparation
Contents General Description
Checks and Preparation
Settings and Measurement
Example of Use Specification
2.15 Noise Countermeasures
Be sure to connect the chassis GND of the measurement object.
It may become effective by ensuring that the chassis GND wire of the measurement object is connected to good ground.
Z3
GL860
Z1 Z2
+
-
Vin
R1
R2
Measurement object
Thermocouple
Input
terminals
Connect the signal chassis GND to the measurement device chassis ground.
Use a short, thick lead to connect the chassis GND of the measurement object to the GL860’s chassis GND.
It will become even more effective if the ground potentials are the same.
Measurement device chassis
GL860
GND GND
Noise countermeasures
If measured values fluctuate due to extraneous noise, conduct the following countermeasures.
(Results may differ according to noise type.)
Ex 1: Connect the GL860’s GND to the ground.
Ex 2: Connect GL860’s GND to the measurement object’s GND.
Ex 3: In the AMP settings menu, set the filter to any setting other than "OFF".
Ex 4: Set the sampling interval which enables GL860’s digital filter.
Use the "OTHER" menu to set the commercial power frequency you use.
Refer to "3.4 Setting Menus" for details.