3.4.3. Force (pressure) calibration
Equipment:
- Digitron pressure meter, model: 2022P (0-1500 mmHg);
- 50 ml BD PLASTIPAK or 60 ml BD syringe with extension line.
Screws fastening rear case to front case must be unscrewed.
Select the Force sensor from calibration menu and press the OK softkey. Then follow directions
on the display.
When the Is pusher free? message appears, make sure that pushing surface of the retainer is not
in contact with any part of pump or extraneous object.
When Adjust readings... message appears check the value indicated at left bottom corner of
screen and adjust it, if out of above indicated on the screen range, by means of potentiometer
R30 on the Drive Unit.
Upon prompt of inserting syringe, fill syringe with 10-20 ml of water, and fit it to the pump.
Connect pressure meter to the syringe by means of the extension line. Locate the pressure meter
at the same height as the syringe and press the OK softkey.
After the pusher comes in contact with syringe plunger press the > softkey and keep it depressed,
allowing the transmission to run until the pressure meter reads (120±1.5) cmHg. When
approaching the target value, it is recommended to run transmission in short steps, pressing the >
key momentarily. If you fail to stop movement timely and target value is overridden, calibration
procedure must be repeated from the beginning.
When pressure is adjusted as required, press the OK softkey.
Press the BACK softkey to exit.
Aitecs 2016 Service Manual 1 0
NOTE. When calibrating force sensor after repairing or replacing drive or pusher, it is necessary
to go through described above procedure three times, first and second time running transmission
until pressure goes to 140-150 cmHg, and the last time – exactly as described.