M.I. P/N 004-2163 Rev. C
18
fluid such as blood or saline, so the catheter must be in a conductive fluid to use this
feature.
Catheter Calibration Tab
The
Catheter Calibration
screen allows the user to electronically calibrate the pressure,
volume, and ECG signals.
Pressure
Balance Locked/Unlocked Button
Use the
Balance Locked/Unlocked
button to unlock the balance controls.
The button automatically locks after 60 seconds of inactivity within the balance controls
interface.
Pressure 1/Pressure 2
The
Pressure 1
and
Pressure 2
scales graphically display the currently measured
pressure from
−
25 mmHg to 200 mmHg.
This number is also numerically displayed. The calculation of the pressure value is based
upon the system’s scale of 1V/100mmHg. The system provides 5V excitation to
transducers assumed to have a sensitivity of 5
μ
V/V/mmHg. (See “
Theory of Operation
–
Strain Gauge Pressure
Transducers
.”) The system is designed to use Millar Mikro-Tip
®
pressure transducers with 1000 ohms input impedance and 1000 ohms output impedance.
All Millar Mikro-Tip pressure transducers are factory-calibrated to meet these standards.
Detailed Operation
