Fresenius Medical Care 2008K2 Troubleshooting Manual page 359

STEP #3:
Watch the external meter for thirty (30) seconds. Its reading MUST BE stable i.e. does NOT
change more than +/- 0.15 mS?
Yes Conductivity is stable! Continue to STEP #4.
a) Return to Dialysis Program ("Select Program" → 'Dialysis' → 'CONFIRM')
No
b) See (ABOVE) procedure number
STEP #4:
Is the screen's Frequency window between ten-thousand (10000) and twelve-thousand
(12000) Hz (Hertz)?
Yes Frequency between 10000 and 120000 Hz! Continue to STEP #5.
No Frequency is NOT between 10000 and 12000 Hz! See parts a AND b below:
STEP #5:
If Cond Cell #7's reading stabilizes, "5. Conductivity value is stable...." appears and the
[Conductivity] data box turns pale yellow / white?
a) Figure below, trace Cond Cell #7's cable to ENSURE it plugs into the
Distribution board PROPERLY. If not this is the problem!
b) FIVE (5) possible bad components (see Component List below). Swap in, one
at a time with known good and in between repeat (ABOVE) procedure number
CO- 6.2.0 (page 354) to test each.
COMPONENT LIST:
1) Conductivity Cell #7; 2) Sensor Board cable; 3) Functional Board;
4) Distribution board; 5) Motherboard
2008K/K2 Troubleshooting Guide
P/N 507298 Rev. H
CO- 5.0.0 (page 350).
Page 355