Voltech AT3600 User Manual page 298

T T
RANSFORMER ESTS
The test voltage can be in the range of 1mV to 5V at a frequency of 20Hz to 1MHz.
The table below gives the recommended test conditions for different values of
capacitance:
When choosing the test conditions, the following potential problems should be
considered:
)
A
)
B
P 7.1.18.
AGE
Capacitance range
→
1pF
10pF
→
100pF
→
1nF
→
10nF
→
The Test Conditions for Capacitance Measurement
C
URRENT LEVELS
For larger capacitance, particularly at higher frequencies, the current flowing
during the measurement can be very high, and similarly the measured current
could also be very small for small capacitance at lower frequencies and
voltages.
Where possible, you should use the recommended test signal levels in the table
above to ensure that the currents which flow can be measured accurately.
N - C
ON LINEAR APACITANCE
Normally non-linearities in the stray capacitance of transformers are not a
problem, and therefore capacitance is measured with as large a voltage as
possible.
Frequency
10pF 100KHz
100pF 100KHz
1nF 10KHz
10nF 1KHz
100nF 100Hz
VPN 98 - 024
V AT3600 U
OLTECH
Preferred test signal
Voltage
5V
5V
5V
5V
5V
T T
ESTS AND
M
SER ANUAL
C
EST ONDITIONS