Gambro AK 95 S Service Manual page 137

Calibrations
Dialysis Pressure Transducer Calibration
1. Disconnect tube no. 46, 20 and the silicone
tube at the deairating chamber see fig.
below.
2. Plug the two lower silicone connectors at
the deairating chamber. Use two plugs
from the calibration kit, see fig. below.
3. Connect the Gambro reference instrument
to the silicone connector on the top of the
deairating chamber via the calibration
tube set. See fig. below.
4. Zeroset the reference instrument, wait for
stable reading.
5. Start the AK 95 S, enter the Service
menu and select Calibrations.
6. Select Transducer, External and
DIALYS PRESSURE TRANSDUCER
from the selection diagram.
7. Press to confirm the selected trans-
ducer.
8. Apply zero pressure by opening the two
clamps A, and B on the calibration tube
set. Set the "REF SET" value on the
AK 95 S to 0 mmHg.
9. Press to enter the setting.
10. Close clamp A. Apply a pressure of approx.
-500 mmHg, shown on the reference
instrument. Close clamp B.
11. Set the "REF SET" value on the AK 95 S
to the reading on the reference instrument
and press
12. Open clamp A and B, then close clamp A
again.
Apply a pressure of approx. +500 mmHg,
shown on the reference instrument. Close
clamp B.
13. Set the "REF SET" value on the AK 95 S
to the reading of the reference instrument
and press
6:10
twice.
.
START
14. Press to load the calibration values
UF
STOP
into the EEPROM.
15. When the EEPROM storage is ready,
press to exit.
If a calibration error occurs:
• Try to do the calibration again.
• If the error occurs a second time:
Change the transducer and the transducer
board.
Report to your Gambro service representa-
tive the error message on the error dis-
play.
AK 95 / AK 95 S Service Manual
HCEN 9138 Rev. 10.2005