2-14. MODULE DESCRIPTIONS (cont)
b. DAYSIDE TEST BENCH 2A1 (cont)
The operator closes the OSA door, the shutter is programmed
open, and shutter status checked. The internal and external
relays 1 through 4, phase A, B, and C contacts are checked for a
The operator opens the OSA door and the OSA
shutter is checked for a closed status.
The internal and exter-
nal relays 1 through 4, phase A, B, and C contacts are checked
for an open status.
The operator applies pressure to OSA door interlock switch S1
while OSA door interlock switch S2 is checked for a shorted con-
The operator then releases S1 and applies pressure to
S2 while S1 is checked for a shorted condition.
then releases S2 and closes the OSA door. The OSA door status
The IVD is then programmed to produce a vertical
output pulse and a horizontal output pulse, which are checked
for period and amplitude.