GE Dash 3000, Service Manual

Page: 176 / 292

7-4 Dash 3000/4000 Patient Monitor Revision A
2000966-339
Calibration: NBP, Analog Output ECG, Analog Output BP, and End-tidal CO2 Software Calibration
NBP, Analog Output ECG, Analog Output BP, and
End-tidal CO2 Software Calibration
Noninvasive blood pressure (NBP), Analog Output ECG, Invasive
Pressures (Analog Output BP), and End-tidal CO2 (optional) require
software calibration.
Perform the NBP and End-tidal CO2 software calibration upon receipt of
the equipment, every 12 months thereafter, and each time the unit is
opened for service. This ensures the pneumatic circuit plumbing has not
developed any air leaks as a result of disassembly. Perform the analog
output ECG and analog output BP software calibration only if these did
NOT pass the analog output checkout procedure.
NBP Calibration
In General
The overall accuracy of noninvasive blood pressure (NBP) readings by
the monitor depend on the following:
„
the zero pressure reading, and
„
the voltage span of the NBP sensor in the monitor.
This procedure provides a method of verifying these items are accurate
and also checks the NBP pneumatic circuit plumbing for leaks.
The manufacturer recommends performing this procedure upon initially
receiving the monitor, before it is used on a patient, and once each year
thereafter. Also, perform the procedure each time the monitor is opened
for service or repair, simply to verify the NBP pneumatic circuit
plumbing did not develop inadvertent air leaks.
Required Test Equipment
The following items are required to successfully complete the NBP
calibration procedure.
Refer to
“Noninvasive Blood Pressure Tests” on page 4-50 for setup
guidelines.
„
Voltmeter,
„
Unterminated defib sync cable,
„
Manometer (Sensym PDM200M or mercury manometer),
„
NBP tube, pn 9461-203,
„
NBP cuff, pn 9461-301 (any size works), and
„
Something to wrap the NBP cuff around (PVC pipe or coffee can).