Fresenius Medical Care 2008K Troubleshooting Manual page 150

CO- 7.0.3 CHECK PRE-DIALYZER CONDUCTIVITY
a) Place the 274 resistor plug, from the two resistor set, into conductivity cells #7 distribution board
th
position "COND" (6
b) Place the 6.04 K resistor plug into NTC #3's distribution board position "MON-NTC" (2
from the left).
c) Be CAREFUL to follow the instructions exactly here! Attempt Cond Cells calibration again. After no
more than 5 minutes, does the screen's Conductivity data box stabilize and advance to step #5,
"Conductivity value is stable...." and the Conductivity data box turn yellow (active)?
Yes CAUTION! Do NOT press the 'CONFIRM' key. See procedure number
148).
No a) CAREFULLY return conductivity cell #7 to distribution board position "COND" and
NTC #3 to distribution board position "MON-NTC".
b) Swap the following components, one at a time, with known good, attempting Cond
Cells calibration in between: 1) Actuator board; 2) Sensor board; 3) Function board;
4) Distribution board.
CO- 7.0.4 VERIFY CONDUCTIVITY CELL PROBLEM (PRE OR POST)
Was the recorded problem (from procedure numbers CO- 6.0.0 or CO- 6.0.3) with the pre- dialyzer OR
post-dialyzer conductivity cell (proceed accordingly)?
Pre-Conductivity Cell (#7): Replace conductivity cell #7 (see
Post-Conductivity Cell (#13): See procedure number
CO- 7.0.5 ISOLATE POST DIALYZER CELL
a) Escape the calibration then repeat the Cond Cells calibration but this time do NOT use the dialyzer.
b) After no more than 30 minutes, does the post-dialyzer Cond Cells calibration complete all four steps?
Yes 'Escape' the calibration and repeat Cond Cells calibration with a different dialyzer.
No See procedure number
CO- 7.0.6 TROUBLESHOOT POST-DIALYZER CONDUCTIVITY
a) With the post-dialyzer calibration screen remaining active,
place the 274 resistor plug, from the two resistor OLC set,
into conductivity cell #13's distribution board position "x13" (10
connectors from the left, see Figure right).
b) Is the Frequency data box between 9800 and 11000 Hz AND
stable (+/- 5)?
Yes The post dialyzer conductivity cell #13 may be bad (see Figure 309, page 154).
No Swap the following components, one at a time, with known good, attempting Cond Cells
calibration in between: 1) Actuator board; 2) Sensor board; 3) Function board;
4) Distribution board.
position from the left).
CO- 7.0.6 (page 148).
Fresenius 2008K Troubleshooting Guide
P/N 507298 Rev. B (Draft 1)
Section 5 – Conductivity/ On Line Clearance Problems
Figure 57, page 138).
CO- 7.0.5 (page 148).
nd
position
CO- 7.0.4 (page
Page 148