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⟦4fd8dea59⟧ Wang Wps File
Length: 5082 (0x13da)
Types: Wang Wps File
Notes: CPS/TCN/042, issue 2
Names: »2029A «
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└─⟦8b37ca311⟧ Bits:30006109 8" Wang WCS floppy, CR 0174A
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WangText
…02…CPS/TCN/042
…02… EV/831017…02……02…#
RELIABILITY MONITORING OF DELTA DATA
7260 TC VDU…02……02…CAMPS
1 PURPOSE .......................................
4
2 INTRODUCTION ..................................
4
3 RELIABILITY MONITORING ........................
4
3.1 FAILURE REPORTING ..........................
4
3.2 OPERATING TIME MONITORING ..................
5
3.3 RESULTS ....................................
5
ATTACHMENTS: DATA SHEETS
1̲ ̲ ̲P̲U̲R̲P̲O̲S̲E̲
The purpose of this document is to outline the method
used for the VDU reliability monitoring and to present
the results.
2̲ ̲ ̲I̲N̲T̲R̲O̲D̲U̲C̲T̲I̲O̲N̲
The DELTA DATA 7260 TC VDU is a newly developed piece
of equipment with which Christian Rovsing A/S has no
prior experience regarding operational reliability.
Upon delivery from the manufacturer each VDU is subjected
to an incoming inspection test (ref CPS/TPR/012) followed
by a 72 hour burn-in period.
After incoming inspection and burn-in all VDUs, which
are not to be used for development and system testing,
are packed and stored until delivery to the individual
sites.
The reliability monitoring is performed on the VDUs
which are used for system development and testing.
3̲ ̲ ̲R̲E̲L̲I̲A̲B̲I̲L̲I̲T̲Y̲ ̲M̲O̲N̲I̲T̲O̲R̲I̲N̲G̲
3.1 F̲A̲I̲L̲U̲R̲E̲ ̲R̲E̲P̲O̲R̲T̲I̲N̲G̲
After completion of incoming inspection all observed
failures are reported and filed by means of the established
Failure Reporting System (ref. CPS/PLN/006).
3.2 O̲P̲E̲R̲A̲T̲I̲N̲G̲ ̲T̲I̲M̲E̲ ̲M̲O̲N̲I̲T̲O̲R̲I̲N̲G̲
The elapsed operating time is for each individual VDU
recorded by means of the counter MCLK displayed in
the Configuration Menu. MCLK is a hexadecimal display
of the number of elapsed 6 minutes intervals of operating
time. The contents of MCLK cannot be altered by any
user accessible VDU function.
The initial value of MCLK is in accordance with observations
during incoming inspection assumed to have been HEX
55AC00 or 000000.
3.3 R̲E̲S̲U̲L̲T̲S̲
According to the attached datasheets 40 VDUs have been
monitored. The data sheets contains for each VDU the
following data:
a) Serial no.
b) Reading of MCLK
c) Calculated operating time
d) Observed no. of failures.
The total accumulated operating time was at the time
of issue of this document 201,624.8 hours and the total
no. of failures observed was 18.
A representative reliability figure will be obtained
if the period of observation starts after burn-in.
This results in the following figures:
Acc. operating time: 198,744.8 hours.
No. of failures observed: 18
Average MTBF: 11,041.4 hours.
R̲E̲L̲I̲A̲B̲I̲L̲I̲T̲Y̲ ̲T̲E̲S̲T̲I̲N̲G̲ ̲O̲F̲ ̲D̲E̲L̲T̲A̲ ̲D̲A̲T̲A̲ ̲V̲D̲U̲ ̲7̲2̲6̲0̲T̲C̲
READING OF
VDU MCLK (HEX OPERATING OBSERVED NOTES
S/N OPERATING TIME NO. OF
TIME COUNTER) (HOURS) FAILURES
̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲
̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲
0857 5612D3 2632,3
0891 003466 1341,4 1 during burn-in
0892 5613C5 2656,5 1
0934 56EF4F 8276,7
0939 008FF0 3684,8 2
0945 0103A8 6647,2 1 during burn-in
0946 01220E 7425,4
0947 569895 6056,5 1 1 during burn-in
0953 562F2E 3358,2
0965 56BA62 6921,8
0966 56EC4C 8199,6 1
0976 56F2F3 8369,9 1
0981 56BBBC 6956,4 1 during burn-in
1017 5629B2 3217,8
1148 56387C 3596,4
1157 56B566 6794,2 1
1158 569AD2 6113,8 1
1236 56C37B 7154,7 1
1240 569299 5903,3 4
1247 010359 6639,3
1249 00F501 6272,1
1266 56CE3E 7430,2 2
1276 565F0E 4583,8 1
1277 56BBA0 6953,6
1401 005140 2080,0
1403 5703CB 8801,1 1
1419 571707 9293,5
1421 56BEF5 7038,9
1644 562C03 3277,1 1
1657 563559 3516,1
1674 562679 3135,3
1675 5680BB 5445,9
1679 5633AC 3473,2
1695 563323 3459,5
1702 561FD5 2965,3
1824 55CD07 845,5
R̲E̲L̲I̲A̲B̲I̲L̲I̲T̲Y̲ ̲T̲E̲S̲T̲I̲N̲G̲ ̲O̲F̲ ̲D̲E̲L̲T̲A̲ ̲D̲A̲T̲A̲ ̲V̲D̲U̲ ̲7̲2̲6̲0̲T̲C̲
READING OF
VDU MCLK (HEX OPERATING OBSERVED NOTES
S/N OPERATING TIME NO. OF
TIME COUNTER) (HOURS) FAILURES
̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲
̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲
1831 5617B8 2757,6
1864 562BEC 3274,8
1866 562EDE 3350,2
3542 004361 1724,9
̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲
̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲
40 VDU's 201624,8 18 4
failures
ob-
served during
burn-in
burn-in time:
40 x 72 hours: 2880,0
total operating
time after
burn-in: 198744,8
