Voltech AT5600 User Manual page 116

C H A P T E R 7 – T E S T S
Specifying the Test Limits
When specifying turns ratio tests, it is preferable to avoid limits which are
unnecessarily tight, and which may therefore lead to measurement difficulties.
For example, if two equal secondary windings should have 10 turns each, the
ratio should be 1:1. One turn in error would produce a ratio error of 10% or -10%
(i.e. 11:10 or 10:11), and therefore limits of +5% and -5% would be suitable to
detect the error.
Please also see
14.6.10 for specific advice on programming the test, and
10.2.4 for test accuracy specification
AT5600 User Manual 98-119 issue 14
A N D T E S T C O N D I T I O N S
Page 116