User Manual
2253i / 2253iX
AMETEK
California Instruments
120
POWER INTERRUPT
This test requires a numeric entry value equal to the test number. The tests are grouped as follows:
•
Test numbers 1 through 15 are for all Standard and Groups. See Figure 9-6 for details of the
tests.
•
Test numbers 16 and 17 for all equipment that does not incorporate digital circuit. Test number 16
will drop the output to zero voltage for 50 ms. Test number 17 will drop the output to zero voltage
for 200 ms. Test numbers 21 through 26 are applicable for Groups 2 and 3 only for EUROCAE
standard and category A(NF) and A(WF) for RTCA2. Output frequency will be set to the F1 value
for 1 second prior to the test. The output frequency will remain set to the F2 value when the test is
completed. This will allow the user to apply a sequence of power interrupts. See Figure 9-7 for
detail of the tests.
V (NOM)
% of V NOMINAL
(V MIN)
0 VOLTS
T1
T2
T3
DO160 Table 16-1: Test conditions for equipment with digital circuits.
NOTES
1:
Definitions:
T1
Power interrupt time
T2
Time it would take for the applied voltage to decay from V (nom) to zero volts.
T3
Time it would take for the applied voltage to rise from zero to V (nom) volts.
V MIN The minimum level (expressed as a percentage of V NOMINAL) to which the applied voltage is
permitted to decay.
2:
Tolerance to T1, T2, T3 = ± 10%
3:
Test condition numbers 8 and 15 are for category Z, dc powered equipment only.
Applicable
Category:
A
A, Z
Z
A, B, Z
A, Z
Z
Test Con-
dition No.
1**
2
3
4
5
6
7
8
9
10
11
12
13
14
15
T1 (ms)
2**
10
25
50
75
100
200
1000
10
25
50
75
100
200
1000
T2 (ms)
<1
20*
20
20
20
20
20
20
50*
50*
50
50
50
50
50
T3 (ms)
<1
5
5
5
5
5
5
5
20
20
20
20
20
20
20
%V Nom.
(V min)
0
50
15
10
5
0
0
0
80
50
0
15
5
0
0
*
Voltage will not reach zero in this test condition.
** Equipment performance standards may require to repeat test n°1 with T1 varying from 5 to 200 ms by step defined in
the test equipment performance standards (step typically comprised between 5 ms and 20 ms depending on equipment
design.
Figure 9-6: Power Interrupt
