Cr- 1.0.4 Between -11.0 And -13.0 Volts/Isolate Cells Calibration; Cr- 1.0.5 Isolate Conductivity Circuit - Fresenius Medical Care 2008K2 Troubleshooting Manual

CR- 1.0.4 BETWEEN -11.0 AND -13.0 VOLTS / ISOLATE CELLS CALIBRATION
A) Turn the machine OFF.
DO NOT allow the acid and LIQUID bicarb to run empty subsequently!
B)
C) Place the machine into Service Mode → Calibrate Sensors → Cond Cells.
D) ENSURING the external flow indicator's 'bob' is moving up at least ¼ way up in the sight tube ALLOW
six (6) minutes BEFORE continuing to part E.
E) Set the external meter to measure Temperature (°C). If temperature is stable between 35.1 and 39.9°
C continue to part F. If (and ONLY if) temperature IS NOT between 35.1 and 39.9° C proceed to
302
, procedure number T- 7.0.0
F) Set the meter to measure Conductivity (mS).
G) Proceed per the screen's instructions. Is the Cond Cells calibration successful?
Yes Calibration successful! See procedure number
No Calibration IS NOT successful ("Operator Error")! Swap in the listed component (see
Component List below), one at a time, with known good then, in between, repeat
procedure number
Component List: 1) Sensor Board; 2) Test Board; 3) Actuator-Test Board; 4) Functional
Board's EEPROM (IC20); 5) Functional Board.

CR- 1.0.5 ISOLATE CONDUCTIVITY CIRCUIT

Turn the machine off then back on. Does the "Cond Ref Failure" OR "Cond Offset Failure" reoccur (Yes or
No)?
Yes Problem reoccurs! Swap in the listed component (see the Component List below) one at a
time, with known good then, in between, repeat procedure number
the new component. When the Failure DOES NOT reoccur the last component swapped in is
the problem.
Component List: 1) Sensor Board; 2) Test Board; 3) Actuator-Test Board; 4) Functional
Board's EEPROM (IC20); 5) Functional Board
No If the Sensor Board and / or Functional Board and / or Functional Board's EEPROM (IC20) was
replaced it is necessary to perform ALL calibrations.
CR- 1.0.4 (page 406) to test each new component.
2008K/K2 Troubleshooting Guide
P/N 507298 Rev. H
CR- 1.0.5 (page 406).
CR- 1.0.4
page
(page 406) to test
Page 406