Siemens ADVIA 2120, Operator'S Manual, Page: 71 / 477

5-4 Troubleshooting the Analyzer
You have to first pull the 20 and 40 psi pressure regulator knobs, then turn to
adjust.
Regulator
20 in. Hg vacuum
20 psi pressure
5 psi pressure
40 psi pressure
Acceptable Reading
20
±
1 in. Hg
20
±
1 psi
5
±
0.5 psi
40
±
2 psi
Set to
20 +0.5 in. Hg
20 +1 psi
5 +0.25 psi
40 +1 psi
IMPORTANT
All pneumatic settings must be reached by turning the knobs in an upward
or clockwise direction only . If a reading goes above the target value (see
column 3 on the left), turn the knob back. Allow the analyzer to equilibrate
(get a new reading every 5 seconds), then adjust upward to the correct value.
Maximizing the Perox Lamp Output
The analyzer should be in the
Ready to Run
mode. If it is in
Standby
, the
current A/D reading will not update.
1. At the
Procedures
menu, select
Adjust Lamp/Temp
.
2. Select
Perox Lamp Alignment
.
3. Select
Start Cycle
.
4. Monitor the
Current A/D Reading
field.
5. Loosen the two securing screws (
1
). Do
not loosen the four corner screws (
4
).
6. Perform the following procedure even if
the initial maximum lamp value is greater
than 1.96. Use the side alignment screw
(moves the lamp in a horizontal direction)
(
2 ) and the top alignment screw (moves
the lamp in a vertical direction) ( 3 ) to
peak the position of the lamp. The
maximum value should be between 1.96
and 4.99 volts. However, if the volts are
greater than 4.90, select
Set Light
Intensity first, then return to the Perox
Lamp Adjustment window, select Start
Cycles , and repeat this procedure.
a. In small increments, first turn the side screw, then the top screw
clockwise. If the voltage goes down, turn the screws counterclockwise.
b. Continue alternately turning the screws in small increments until the
maximum value is achieved. The final adjustment should be in the
clockwise direction. Allow 5 to 10 seconds for the screen to update
between each increment.