Voltech AT5600 User Manual page 118

C H A P T E R 7 – T E S T S
The primary and secondary voltages can be calculated from the following:
If you calculate V
signal. If you calculate V
test signal.
Intermediate Inductance
(L )
m
→
100nH
1uH
→
10uH
→
100uH
→
1mH
→
10mH
→
100mH
→
1H
→
10H
→
100H
→
1KH
→
The Test Conditions for Turns Ratio by Inductance Measurement
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
14.6.11 for specific advice on programming the test, and
10.2.5 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
or V to be greater than 5V, you should set 5V as your test
s p
or V to be less than 1mV, you should set 1mV as your
s p
Table 5
1uH
10uH
100uH
1mH
10mH
100mH
1H
10H
100H
1KH
10KH
N
p
V =
V
p m
N
s
Preferred test signal
Frequency
300KHz 10mV
100KHz 30mV
30KHz 50mV
10KHz 100mV
1KHz 100mV
100Hz 100mV
100Hz 300mV
50Hz 1V
50Hz 5V
50Hz 5V
20Hz 5V
Voltage (V )
m
Page 118