GE Dash 3000 Service Manual page 238

Gain calibration test
8-38
Functional and electrical safety checks: Functional Checkout procedures
NOTE
To proceed with the Gain Calibration Test, set up the patient
monitor and test equipment following the guidelines in the NBP
Checkout
1. Connect a cuff and manometer to the patient monitor.
2. Turn the digital manometer on and adjust the range switch to 1000
mmHg.
3. Select CAL GAIN OFF > CAL GAIN OFF > START.
The second line of text on the Cal Gain menu item changes from Cal
Gain Holding to Cal Gain Inflating. The patient 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 patient monitor and the manometer can be observed.
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.
4. 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.
5. 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.
6. Select CHECK CAL OFF > START.
7. 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
Dash 3000/4000/5000
Procedure,"Functional Checkout procedures" on page 8-20.
2000966-542D