Correcting The Measurement Reference Voltage - Omron ZJ-SD Series User Manual

Section 3

Correcting the Measurement Reference Voltage

Correcting the Measurement Reference
Voltage
More accurate measurement results can be obtained by correcting the potential used as a
reference in taking measurements (i.e., resetting zero).
As shown below, zero is reset by using a recommended reference detection object that is
grounded.
• Accurate measurements may not be possible if the object being used as the reference detection
• The same measurement results can be obtained with a jig or other object as long as the
■ Linearity (Reference Values)
The linearity shown in the following graph can be obtained by resetting zero as
described above.
[%FS]
5.0
4.0
3.0
2.0
1.0
0.0
−1.0
−2.0
−3.0
−4.0
−5.0
−6 kV
ZJ-SD
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User's Manual
L
1
body carries a static charge because there is a charged object nearby or because the plate is not
grounded properly.
conditions given for the reference detection object are met.
Linearity
−4 kV −2 kV
Conditions for Recommended Reference Detection Object
Reference detection object
Material: Conductive metal plate
Dimension A ≥ 5L
Dimension B ≥ 5L
Thickness (t) ≥ 1 mm
0 kV 2 kV 4 kV
Note: The graph shows measurement data with n = 8.
A
B
A and B must be at
1
least 5 times the
1
installation distance L
1
Set voltage [kV]
6 kV