GE Dash 3000 Service Manual page 178

Calibration: NBP, Analog Output ECG, Analog Output BP, and End-tidal CO2 Software Calibration
7-6
4. The second line of text on the Cal Gain menu item changes from Cal
Gain Holding to Cal Gain Inflating. The monitor starts pumping up
the pressure bulb or cuff—the audible whirring sound of the NBP
pump motors occurs and an increase in displayed pressures on both
the monitor and the manometer can be observed.
5. The pump shuts off at about 250 mmHg, and the pressure drops
slowly to about 240 mmHg before stabilizing. The second line of text
on the Cal Gain menu item changes from Inflating back to Holding .
If the pressure continues to drop at a rate of 1 mmHg or more for
every five seconds, there is a leak in the NBP plumbing. If there is a
leak in the NBP plumbing, repair it and restart this calibration
procedure.
6. Select ENTER CAL PRESSURE and use the Trim Knob control to
select a pressure value that is 1 mmHg lower than the current
manometer reading. When the manometer falls to exactly the value
that you selected in the pop-up window, press the Trim Knob
control to enter the value.
7. Select CHECK CAL OFF-> START.
8. The text on the menu item changes from Check Cal Off to Check Cal
In Progress. Verify the pressure readings (shown as Cuff in the NBP
parameter box) on the monitor and manometer are equal (± 1 mmHg)
for AT LEAST one full minute.
9. Select CHECK CAL IN PROGRESS -> STOP. The monitor
automatically releases pneumatic pressure in the entire plumbing
circuit.
Dash 3000/4000 Patient Monitor
2000966-339
028B
Revision A