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SIARETRON 1000 – 1100 - 3000
Service Manual
4.2
LV200 I/O BOARD
Connect the POWER, PANEL and LV200I/O boards referring to the connecting drawings of
figure 4.1.
Then verify that the secondary of transformer is connected to CN7 POWER connector; finally supply the main of
transformer.
To enter the testing program, press the ON/OFF switch keeping pressed the LOW AIRWAY PRESS.
AIRWAY PRESS
buttons until a short sounds will occur, hence release the above mentioned buttons and e
press ALARM RESET button within 5 seconds. Another short signal will sound, on MINUTE VOLUME display
message TESTIING will appear once, after that on the same display the alternated script: I-O | ofG will appear.
NOTE: from now and on all references to components and specific points of mounting plan have to be referred
to LV200I/O integrated circuit.
Regulations (take the mass reference of multimeter on TP1 test point):
A)
Regulate the +V_ANA electric power (TP5 of mounting plan) at +10 V ± 0,05 V turning the TR3
Trimmer (point A of mounting plan).
B)
Regulate the offset of acquisition channel of oxymetry cell; short-circuit the pin 1 and pin 4 of
AMP 4 leads CN12 connector; take at maximum gain by turning the TR1 multirevolution trimmer
(point B of mounting plan) clockwise; regulate the electric power of TP3 point of mounting plan
at 0 V ± 0,01 V by turning the TR2 trimmer (point C of mounting plan).
C)
Apply to CN12 connector an electric power of 75 mV between pin 4 (+) and pin 1 (GND);
regulate the electric power of point TP3 of mounting plan at 4,5 V ± 0,05 V turning the TR1
multirevolution trimmer (point B of mounting plan).
Regulate the pressure acquisition channel (MPX10: mass reference of multimeter on GND):
A)
At atmospheric pressure, regulate the electric power AD0 (TP2 of mounting plan) at +1V ± 10
mV by turning the TR1 multirevolution trimmer of offset on MPX10 hybrid circuit (point D of
mounting plan).
B)
Apply a pressure of 40 cm H
regulate the electric power AD0 (TP2 of mounting plan) at +3V ± 50 mV turning the TR2
multirevolution trimmer of gain on MPX10 hybrid circuit (point F of mounting plan).
Regulation of battery alarm threshold: from panel, while the alternated scripts: I-O | ofG appears,
connect to the under testing board the battery simulator as per the following drawing:
SIARETRON_SE3_en
Power
supply
O ± 1 cm H
O to MPX10 sensor (point E of mounting plan);
2
2
21 / (72 )
and HI
( rev.3) 30.06.2004
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