Gambro AK 95, Service Manual

Page: 133 / 247

AK 95 / AK 95 S Service Manual
HCEN 9138 Rev. 10.2005
6:6
Calibrations
Arterial Pressure Transducer Calibration
1. Connect the Gambro reference instrument
(together with a calibration tube set) to
the arterial pressure transducer on the
front of the AK 95 S, see fig. below.
2. Zeroset the reference instrument, wait for
stable reading.
3. Start the AK 95 S, enter the Service
menu and select Calibrations .
4. Select Transducers , External and
ARTERIAL PRESSURE TRANSDUCER
from the selection diagram.
5. Press to confirm the selected trans-
ducer.
6. Apply zero pressure by opening the three
clamps A, B and C on the calibration tube
set. Set the “REF SET” value on the
AK 95 to 0 mmHg.
7. Press to enter the setting.
8. If the lit
START
UF
STOP
key is pressed at this time
the machine stores the offset for the
transducer in the EEPROM and updates
the checksum.
For the sensitivity calibration
(the slope):
Close clamp A. Apply a pressure of approx.
-500 mmHg, shown on the reference in-
strument. Close clamp B.
ART PR LOW REF SET HIGH
1.2 -550 -500 550
9. Set the “REF SET” value on the AK 95 S
to the reading on the reference instrument
and press twice.
10. Open clamp A and B, then close clamp A
again. Apply a pressure of approx. +500
mmHg, shown on the reference instru-
ment. Close clamp B.
ART PR LOW REF SET HIGH
1.2 -550 +500 550
11. Set the “REF SET” value on the AK 95 S
to the reading on the reference instrument
and press .
12. Press
START
UF
STOP
to load the calibration values
into the EEPROM.
13. 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.
B
A
C