39
VI. Select “Check” from the NIBP service menu.
VII. Inflate the system and observe the calibration pressure measurement system - the pressure
will be seen to rise and, at the “Pop Off Pressure”, will immediately deflate, with the pump
stopping and DINAMAP
™
Compact
reporting an “Overpressure” alarm.
VIII. Verify that the maximum pressure, as shown on the calibration pressure measurement system,
was in the range 300 to 330 mmHg (400-440mBar).
3.3.4 NIBP Pop Off Pressure Calibration
This section describes how to set the Pop Off pressure - that is, the pressure at which the DINAMAP
™
Compact
hardware automatically opens the valves to atmosphere and stops the pump.
Only the “Neonatal” overpressure needs to be set; the adult pressure will be double that of the neonatal.
Calibrating the Pop Off pressure is not possible without disassembling the DINAMAP
™
Compact
, since a
jumper (LK1) needs to be added on the Main Board to allow the adjustment. The jumper is removed after
calibration during product manufacture.
I.
Ensure LK1 is fitted on the Main Board
II.
Set up the DINAMAP
™
Compact
and calibration equipment as shown on page 41.
III.
Switch on the DINAMAP
™
Compact
and allow 10 seconds to settle.
IV.
Verify that the calibration pressure measurement system reads 0 mmHg (0 mBar)
a. If the DINAMAP
™
Compact
displays the language menu, choose “English”, then “OK”.
b. Reboot the DINAMAP
™
Compact
by turning monitor off, then back on.
V.
Select the “Mode” button from the main menu. The Mode menu will be displayed
VI.
Select the “Service” button from the mode menu
VII.
Enter the Service Mode PIN code,
2 2 1 3
. The Service menu will be displayed.
VIII.
Select “NIBP” from the service menu. The NIBP Service menu will be displayed
.
-- Note --
From this point, the timing is critical.
It is recommended to read through
the following steps before proceeding.
X.
Select “Pop Off” from the NIBP service menu.
XI. Apply exactly 157.0 mmHg of pressure using the bulb pump or syringe, and hold the pressure.
XII. Approximately 12 seconds after the “Pop Off” option was selected, the monitor will bleep 3
times and then start calibration. Rigidly maintaining the pressure at this point is crucial.
IMPORTANT: The monitor requires a 157.0 mmHg pressure setting. Failure to maintain
157.0 mmHg could potentially cause an erroneous pressure reading to be stored in the
EEPROM, thereby rendering the monitor inoperable.
XIII. When calibration is complete, the monitor will enter its Failsafe alarm mode.
XIV. Turn off the DINAMAP
™
Compact
, and remove LK1.
XV. Check calibration by repeating test
3.4.3
.
XVI. Perform the Manual Release Test Procedure as per Section 5.4 prior to release of unit
for clinical usage.
Note:
If overpressure occurs when applying pressure in point (XII) above, turn off the DINAMAP
™
Compact
and re-start the sequence.
