YOKOGAWA 2558A - Deviation Calibration

Appendix
App-3
IM 2558A-01EN
3
2
1
4
5
6
7
8
9
10
11
12
13
14
15
16
App
Index
Deviation
The deviation dials are used to move the meter needle that has been forced to point to a position short
of the accurate position with the preset feature (see the previous page) to the accurate scale position.
The value shown on the deviation display when the needle is pointing to the accurate position is the
calibration deviation. See sections 2.4 and 5.7.
Ammeter
4.5 A → 5 A
Main setting = 10 A
Use the deviation dial to align the
meter needle to the accurate scale
position.
Example: 4.5 A → 5 A
The deviation is –0.03%.
Appendix 2 Example of Using the 2558A to Calibrate an Analog Meter