Tests 25,26, Fm_stat_nflt, fm_stat_flt, Test 27 – Fluke 900 User Manual
Page 33: Fmask_wb_test, Test 28 fmask_cal, Tests 29,31,33,35,37,39 fmxx_flt, Tests 30,32,34,36,38,40 fmxx_nflt, Test 41 act_dis_clr, Tests 25,26 fm_stat_nflt, fm_stat_flt - 9, Tests 25,26 fm_stat_nflt, fm_stat_flt
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FLUKE 900 SERVICE MANUAL
Selftest
NOTE:
For test 24, an X in the goieral test result means that individual results are
unavailable.
TESTS 25,26
FM_STAT_NFLT, FM_STAT_FLT
These tests perform a static FMASK test All lines are expected to pass for the "_NFLT" test
while all lines are expected to fail for the "FLT" test
TEST 27
FMASK_WB_TEST
This test does an approximate test using fixed values for FMASK. It uses a tolerance three
times that of the FMxx tests. This test is performed to determine whether or not the FMASK
curve is within a very wide margin.
TEST 28
FMASK_CAL
This routine determines the calibration values to be used by FMASK.
TESTS 29,31,33,35,37,39
FMxx_FLT
These tests use a pulse of fixed duration (40, 80,120,160
,200
and 240ns) and set FMASK to
just below the duration of the pulse. All lines are expected to produce a fault Those which
do not are flagged as faulty.
TESTS 30,32,34,36,38,40
FMxx_NFLT
These tests use a pulse of fixed duration (40, 80,120,160,200 and 240ns) and set FMASK to
just above the duration of the pulse. AH lines are expected to produce no fault Those which
do are flagged as faulty.
TEST 41
ACT_DIS_CLR
This test checks the disabling and clearing functions of the activity circuitry. It disables the
activity circuit and pulses all lines. Any lines which indicate activity are flagged as faulty. It
also verifies that the activity latches may be cleared and that a single edge on all lines
produces a 1 (activity occurred) in all latches.
3-9