28 Oct
1997 21:57
CELL-DYN
®
3/35 Sample Loader TS Guide 9140234B-June 1997
VERIFICATION PROCEDURES
VP - 5.2 Tube Detect Sensor (Beam Block) Adjustment
3 - 75
3
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e. Turn VR8 clockwise until volta
e is .020 +/- .005 VAC. (This sets si
nal level to where ampli-
fier just be
ins to saturate.)
f. Move the positive (+) lead of the volt meter to C37 on side near RA11 and record the AC volt-
a
e. (This is output of second amplifier sta
e and input to amplifier U14F pin 13.)
. Multiply recorded volta
e by .8 and, without movin
volt meter, readjust VR8 to this new value
(+/- .005 VAC).
This sets amplifier output to 80% of the saturation volta
e level.
7.
[NON-CE MARK ONLY]
- Adjust Offset (Fi
ure 3-34, Pa
e-3-74).
a. Set the volt meter to DC volts and move positive (+) lead of volt meter to TP Pin 1, (detector
circuit output).
b. Turn VR7 fully counter-clockwise. If TP Pin 1 remains at a lo
ic hi
h (>2.4 volts DC) no further
adjustment of VR7 is necessary,
o to
Step 7d
.
c. Slowly turn VR7 clockwise until TP Pin 1 just switches to a lo
ic hi
h (>2.4 volts DC).
d. Remove the resistor.
e. Verify adjustment by performin
“VP - 5.1 Tube Detect Sensor (Beam Block) Check” (Pa
e
3-66).
8.
[CE MARK ONLY]
- Adjust Sensor Sensitivity.
a. Move positive lead to TP10 on CPU Main Board.
b. Without a tube in the li
ht path, set R6 to 3.0±0.25VDC.
c. Place a tube in the li
ht path and verify that the volta
e at TP10 shifts to a volta
e less than
1.5VDC.
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