Gambro AK 95 S Service Manual page 130

AD Converters
1. Start the AK 95 S, enter the Service menu
and select Calibrations.
2. Choose AD-converter.
When selecting "AD-Converter" from the display
with the SET knob and press
display appears:
SELECT AD-CONVERTER
CPU-C CPU-P
3. Select an AD-converter with the SET knob
and press
CPU X AD LOW
xx.xx mV xx.xx
4. Measure the voltage (using a 4.5 digit
voltmeter), between following testpoints or
across the resistor:
CPU Testpoint Ref
CPU-C
CPU-P
CPU-W
MM 95
CPU C driver board
AD ref voltage range:
45.00 to 55.00 mV
CPU C A/D ref
AD ref voltage range:
4.500 to 5.500 V
CPU W PROM
CPU W
SafeRAM
AK 95 / AK 95 S Service Manual
HCEN 9138 Rev. 10.2005
key following
CPU-W MM95
key.
REF SET
xx.xx
Tetspoint
TP 6 TP 5
TP 1 TP 2
TP 3 TP 4
R 24 R 24
TP 5
TP 6
TP3
WREF
TP4
Z0VRW
5. Set the "AD REF VOLTAGE" on the
display to the value shown on the voltme-
ter and press
6. Press
EEPROM.
CPU X
7. Press
HIGH
xx.xx
Circuit board
Control Driver board
Protective Driver board 45.00 - 55.00
Protective CPU board
MM I/O board
AD ref voltage range:
45.00 to 55.00 mV
PVREF
TP2
Z0VAD
Buzzer
MM I/O AD ref voltage range:
45.00 to 55.00 mV
(TP1)
(TP2)
R24
pH plug
.
START
to load the value into the
UF
STOP
AD-REF VOLTAGE STORED
to exit.
Limits (mV)
45.00 - 55.00
4500 - 5500
45.00 - 55.00
TP1
Calibrations
6:3