Venous Pressure Transducer Calibr - Gambro AK 95 S Service Manual

Venous Pressure Transducer Calibration
1. Connect the Gambro reference instrument
(together with a calibration tube set) to
the venous 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
VENOUS PRESSURE TRANSDUCER
CPU P 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 S to 0 mmHg.
7. Press to enter the setting.
START
8. If the lit
UF
STOP
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.
VEN PR LOW
1.2 -550
9. Set the "REF SET" value on the AK 95 S
to the reading on the reference instrument
and press
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.
AK 95 / AK 95 S Service Manual
HCEN 9138 Rev. 10.2005
key is pressed at this time
REF SET HIGH
+500 550
twice.
VEN PR LOW
1.2 -550
11. Set the "REF SET" value on the AK 95 S
to the reading on the reference instrument
and press .
START
12. Press to load the calibration values
UF
STOP
into the EEPROM.
13. When the EEPROM storage is ready,
press to exit.
Continue with the venous pressure transducer
calibration for CPU C.
Follow this instruction except for paragraph 4,
where VENOUS PRESSURE TRANSDUCER
CPU C shall be selected instead of CPU P.
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.
A
Calibrations
REF SET HIGH
+500 550
C
B
6:5