Test Mode T4 - Pressure Transducer Calibration Verification; Test Mode T5 - Self Test; Test Mode T6 - Performance Test - Coviden Kendall SCD 700 Serie Manual De Funcionamiento Y Mantenimiento

6. The controller will start calibration by displaying "0 mmHg". Each time the B button is pressed the display will
advance to the next pressure in succession. After the last calibration step, press the B button again to reenter
Test Access Mode.
7. Upon completion, the new calibration values are recorded into memory and the unit beeps and reverts back to
Test Access Mode.
8. If the calibration test mode is exited before the process is completed, the previous calibration values remain
unchanged.
9. If a pressure outside of an expected range is sensed during any of the calibration steps an error indicator will be
activated.
Test Mode T4 – Pressure Transducer Calibration Verification
Note: The transducer used in the Kendall SCD™ 700 series compression system is a state-of-the-art, highly precise
and virtually drift free device.
Factory calibration certification is void if the case is opened. Recalibration is rarely required and should be done only
when necessary. Always perform test T4 before test T3 to verify the pressure transducer calibration.
Required Equipment: A regulated, precision air source accurate to ±0.2mmHg over a range of 0-130 mmHg.
1. With nothing plugged into the ports on the back of the controller, enter Test Access Mode. Select Test Access
Mode T4.
2. Press the B button to begin the test.
3. T4 will blink on the display screen until the calibration verification procedure is completed or an error condition
occurs.
4. Valve #1 will be energized throughout the procedure so that the user can verify the calibration of the pressure
transducer with the controller case closed. The pressure standard can be directly connected to the Blatter #1
location at Port A with the case closed. The Bladder #1 location is the left most fitting within Port A (as viewed
from the back of the controller).
5. The controller will prompt the user to apply the pressure to the controller by displaying the required pressure on
the screen. Once the applied pressure is confirmed and stable, press the B button to proceed to the next
pressure. The controller requires a multipoint calibration at 0, 18, 45, 130 mmHg. It is required that the pressure
source be accurate to ±0.2 mmHg and that it is stable.
6. The controller will start calibration verification by displaying "0mmHg". Each time the B button is pressed the
display will advance to the next pressure in succession. After the last step, press B again to reenter Test Access
Mode.
7. For each of the calibration verification steps, the target pressure will be shown on the screen. If the system
reads pressure applied to the controller outside the correct range, then the pressure value will be shown in red
with either a less than symbol "<" or a greater than symbol ">" to indicate the direction of the error. If the
pressure read is within the calibration range, then the target value will be shown in green.
8. Calibration Verification mode does not change calibration values.
Test Mode T5 – Self Test
1. Enter Test Access Mode and select Test Access Mode 05.
2. Press the B button to begin the self-test.
3. T5 will blink on the display screen until the test is completed.
4. An audible error indicator will pip and the unit will perform the full array of tests performed during Start-up.
Test Mode T6 – Performance Test
When in this mode, the user can verify the pump and valve performance, pressure delivery, and the airflow through
the pneumatic circuit. In manufacturing, this test is conducted with known volumes connected to the sleeves. Then
the inflation cycles run during the test at the low and high pump speeds create backpressures in the volumes that are
measured and used to verify system performance.
Kendall SCD™ 700 Series
EN-22