Sensor Logic - Hitachi 902 Service Manual

8.5

Sensor Logic

Unit Name Function
Sample arm Detection of liquid
up/down level
Upper dead point
Abnormal descent
Sample arm HP, cell position
rotation
Reaction disk HP
rotation
Cell count
ADC start
Sample disk HP
rotation
Stop position on
outer/
inner track
Stop position on
intermediate track
Reagent disk HP
rotation
Stop position count
Syringe Upper dead point
Stirrer Upper dead point
up/down
Stirrer arm HP
rotation
Stop position count
Rinse Upper dead point
up/down
ISE sipper Lower dead point
arm
Fuse Detection of blowout
+5 V Detection of
abnormality in voltage
+12 V Detection of
abnormality in voltage
-15 V Detection of
abnormality in voltage
+15 V Detection of
abnormality in voltage
+24 V Detection of
abnormality in voltage
Float SW Upper limit
Lower limit
Vacuum Vacuum degree
Water level in Presence/absence of
vacuum water
chamber
Sensor Condition upon Detection
Resistor type ON when liquid level is
detected
PC SHARP Dark when at upper dead
point
PC OMRON Dark upon collision
PC HAMA Dark when at HP
PHOTO
PC HAMA Dark when at HP
PHOTO
Counting of dark → bright
PC HAMA
PHOTO
ADC start when dark →
PC HAMA
PHOTO bright
PC SHARP Dark when at HP
PC SHARP Bright when at stop position
PC SHARP Bright when at stop position
PC SHARP Dark when at HP
Counting of dark → bright
PC SHARP
PC HAMA Dark when at upper dead
PHOTO point
PC SHARP Dark when at upper dead
point
PC SHARP Dark when at HP
Counting of dark → bright
PC SHARP
PC SHARP Dark when at upper dead
point
PC SHARP Dark when at lower dead
point
ON → OFF
ON when blown out
Comparator L upon voltage drop
Comparator L upon voltage drop
Comparator H upon voltage drop
Comparator L upon voltage drop
Comparator L upon voltage drop
Lead SW OFF when full
Lead SW ON when lowered
ON - OFF ON when deteriorated
ON - OFF ON when present
8 - 7
Inversion
Output Signal
on DI
Board
H Inverted
H Inverted
H Inverted

L

L

H when counted
H when started Inverted
H Inverted

L

L
H Inverted

L when counted

L
H Inverted

L

L when counted
H Inverted
H Inverted

L
×
L
×
L
×
L
×
L
×
L
H Inverted
L Inverted

L

L