Newport Breeze E150 - Transducer Adjustments

2. a). Pull out the tubing at the output of the pressure regulator for
PEEPIPlateau supply.
b). Hook a standard pressure gauge to it.
c). Adjust the regulator output to read 25 psi.
d). Reattach tubing.
3. Transducer adjustments:
a. R14 (Reference voltage)
1. Measure the voltage across VREF TP3 and Pin
7 of I.C. U20
on the CPU PC board (PCB41
OA).
2. Adjust trim pot R14 to adjust the voltage read to 5 volts.
b. R22 (Transducer offset)
1.
Fix a jumper on
JP1 on CPU PC board.
2.
Turn the mode selector switch to spontaneous mode.
3.
Adjust the pot R22 (offset) to get a pressure display
readout of
0 cmH20. (The left digit display of the
pressure display helps adjust the precise zero value.
When the adjusted value is towards the positive side the
top segment of the left display shall light up and the
bottom segment shall light up when the adjusted zero
value is towards the negative end. The pot R22 should
be adjusted so that the display toggles between the two
segments indicating the most precise zero value.)
c. R27 (Transducer gain)
1.
Pull out the tubing that feeds the manometer and the
pressure transducer at the tee.
1- Pull Out
I/
-
-1 1-
to manometer <--------I tee1 OOD I-------- > to Transducer