Vocx - Open Circuit Voltage - Voltech AT3600 User Manual

5.3. VOCX – O
PEN
The accuracy is based on the chosen test conditions, and is given by:
where:
The value of A
R
where:
During a VOCX test the AT3600/AT5600 automatically applies the test voltage to the part under test and
checks that the voltage has stabilized before recording measurements.
The time that the voltage takes to stabilize will vary with the source type used and the nature of the part
under test. In general (and especially for source types 'Programmable' and 'AT Output Transformer'), the
AT3600/AT5600 will record a measurement very quickly, (typically in less than 0.5 seconds) which is
desirable in a production test environment.
If the measurement were to be recorded after a longer period under power, slightly different readings may
be obtained due to self-heating effects in the part under test.
This effect may be noticed when comparing results taken using different source types or with slower
measurement systems.
V AC I U
OLTECH NTERFACE SER
C V
IRCUIT OLTAGE
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A is the total accuracy (%)
T
A is the basic relative accuracy (%)
R
A is the calibration accuracy (%)
C
A is the correction for voltage level (%)
V
A is the correction for external source type (%)
SRCE
is from Section 5.1 Specification Summary. The other factors for this test are:
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is the test frequency (Hz)
F
M
is the measured voltage (V)
V
M
M 98-072 7
ANUAL ISS
= ���� + ���� + ���� + ����
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= 0.08% + ( 0.001% ∗ ����
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= 0.5% (������������ ������������������������ �������� ���� ���� ���� ���� �������������������� ���� )
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= 0.0% (������������ ���������������� ���� ����, ���������������� ���� ���� ���� ���� ���� �������� �������� ������������������������ ��������)
S
AFETY
)
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0.01%
)
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