Pressure Gauge Calibration - BIO-MED DEVICES IC-2A Service Manual

To calibrate the flow rate:
a. Connect 100% oxygen at 50 psi to the PATIENT GAS SUPPLY connector.
Connect pressure transducer and counter to the EXHALATION VALVE line.
Connect a spirometer to the PATIENT HOSE connector.
PRESSURE control fully counterclockwise and PEEP/CPAP control fully
clockwise. Set the INSPIRATORY EFFORT control anywhere except where
auto-cycling occurs. Set the EXPIRATORY TIME control to the printed 2
second position. Set the universal counter to display inspiratory time and set
the INSPIRATORY TIME control for 1 second (measured on the test
instrument).
b. When the FLOW RATE control is turned fully clockwise to the stop, the flow
should be zero. If not, loosen the set screws and reposition the control knob
on the shaft. Retighten the set screws, rotate the control to the stop again
and retest the flow. Continue this procedure until the flow is completely shut
off at the stop. Make certain that the valve is able to travel its full movement
without the control knob bottoming out on the valve top, and that the knob
doesn't pass over the stop.
c. Set the FLOW RATE control at each printed position and note the volume on
the spirometer. (The settings are in units of liters per minute, therefore they
must be divided by 60 to obtain liters per second.) Spirometer readings
should be within 10% of the printed settings.
If the readings are not within 10%, the flow can be adjusted with the patient
supply regulator (item 35). Increase the pressure (turn the adjusting knob
clockwise) to increase flow volume; decrease the pressure (turn the adjusting
knob counterclockwise) to decrease flow volume. Recheck the flow volume
and continue adjusting as necessary.
d. Set the INSPIRATORY TIME control do that the test instrument displays
exactly 0.4 second. Recheck the flow volume making certain that all the
readings are within 10% of the printed positions.

PRESSURE GAUGE CALIBRATION

The Pressure Gauge readings can be compared to a standard by teeing into the hose
connected to the PRESSURE GAUGE fitting to the IC-2A Ventilator and connecting it to
the standard gauge.
To zero the Pressure Gauge:
a. While IC-2A Ventilator is inoperative, pry off or unscrew the gauge bezel.
b. Using a small screwdriver, turn the zero adjust screw until the desired
indication (zero) is obtained.
Set the MAX.
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