4-42 250cx Series Maternal/Fetal Monitor Revision C
2036947-001
Maintenance: NIBP Calibration and Testing
NOTE: Between entering the external pressure and committing the new
calibration factors the Exit menu item will display as Exit – No Store to
indicate current calibration factors will be lost if Service Mode is
exited prior to selecting Store Calibration.
NOTE: The menu item Store Calibration will only display after Calibration
Verification has been performed during the Calibration procedure.
Overpressure Detection
1. Select
OVP Test
from the
Mode:
option.
2. The monitor will close the valves.
3. Reset the peak read feature of the external manometer.
4. Using the hand bulb inflate system until overpressure is detected. When
approaching the overpressure trip point inflate the system slowly.
5. If overpressure occurs outside of 300 mmHg (40.0 kPa) to 330 mmHg
(44.0 kPa), on the external manometer, then:
6. Retest by slowly inflating monitor pressure.
7. Recheck Calibration Verification and retest Overpressure Detection.
8. Call Technical Support.
9. Upon detection of overpressure the monitor will vent pressure to atmosphere
and re-zero the transducers.
10. The maximum monitor detected pressure will be displayed near the bottom of
the NIBP Calibration screen.
System Leakage
1. Select
Leak Test
from
Mode:
.
Make sure you have the 12 foot hose and Normal Adult Cuff tightly
wrapped around a rigid 3-inch cylinder. This air volume is required to
properly test the units leakage rate.
2. Monitor will inflate to approximately 200 mmHg (26.7 kPa).
3. Following inflation the monitor will allow 45 seconds of settling time.
4. Following the settling period two pressure readings are taken 30 seconds apart,
and used to calculate the system leakage rate.
5. The monitor vents pressure to atmosphere following the 30 second
measurement period.
6. When complete the leakage rate (mmHg [or kPa]/min) will be displayed, with
PASS or FAIL, near the bottom of the NIBP Calibration screen.
7. System leakage rate should be < = 6 mmHg (0.8 kPa)/minute.
If the monitor has a leakage rate > 6mmHg (0.8 kPa)/min., inspect the
external and internal pneumatic hoses, valves, connectors for loose
connection and or leaks.
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