Fresenius Medical Care 2008K Troubleshooting Manual page 162

NOTE: Changing Dialysate flow rate, or turning it off, Filling Programs, Pressure Tests and
Temperature or Conductivity alarms (i.e. bypass) affect Table B readings. ASSURE the machine is
stable before responding to variations!
Table B – Debug Screen 5 OLC Values
Parameter Description
Qd Dialysate Flow Rate
QdS Dialysate Flow Stability
Current TI Temperature sensor NTC-3
(pre-dialyzer) stability
QbS Blood Pump Stability
Counter
Avg TI Pre-dialyzer temperature
stability over the last 12
minutes
Pre Dev val Conductivity Cell #7 (pre-
(value) dialyzer) stability
Pre Stbl Ct Conductivity Cell #7 counter
(Counter)
Pre % Stbl Percentage of time pre
(Stable) dialyzer conductivity (cell
#7) is stable over the last
12 minutes
Post Dev val Conductivity Cell #13 (post-
(value) dialyzer) stability
Post Stbl Ct Conductivity Cell #13
(Counter) counter
Post % Stbl Percentage of time post
(stability) dialyzer conductivity (cell
#13) is stable over the last
12 minutes
OLC status Current stage of OLC test
OLC Enable OLC Enabled
CPRE Stable Pre-dialyzer conductivity
when stable during OLC test
CPOS Stable Post-dialyzer conductivity
when stable during OLC test
Value
Should be within +/- 10 ml/min of the selected Dialysate
flow rate
0 – Dialysate flow is unstable
1 – Dialysate flow is stable. May = 0 if bypass occurs, if
Dialysate flow is changed, or Filling Program occurs.
Ranges from 0 (unstable) to 100 (very stable)
Normally 0 to 1. If QbS reaches 20, the OLC test will not
start or will cancel
Should be greater than 70 when the machine is stable at
a dialysate flow of 500 ml/min. May be lower at other
flow rates.
Upper limit is 135 (0.135 mS) when OLC test is NOT
running. If the OLC test is ramping conductivity up or
down Pre Dev val will NOT be stable
Defaults to 90. Must count down to 0 before pre-dialyzer
conductivity (cell #7) is ready for OLC
If OLC test is NOT running should be greater than 90%.
Instability is normal within 12 minutes of an OLC test.
Upper limit is 70 (0.070 mS) when OLC test is NOT
running. If the OLC test is ramping conductivity up or
down conductivity Post Dev val will NOT be stable
Defaults to 70. Must count down to 0 before post-dialyzer
conductivity (cell #13) is ready for OLC
If OLC test is NOT running should be greater than 90%.
Instability is normal within 12 minutes after an OLC test.
0 – OLC not running
1 – At the upper conductivity level (approx. 15.5 mS)
2 – At the lower conductivity level
0 – If OLC is disabled from the Options screens
1 – If OLC is enabled from the Options screens
Not applicable unless OLC (on Line or Manual) were not
performed previously
Not applicable unless OLC (on Line or Manual) were not
performed previously
Fresenius 2008K Troubleshooting Guide
P/N 507298 Rev. B (Draft 1)
Section 5 – Conductivity/ On Line Clearance Problems
Page 160