Fresenius Medical Care 2008K Troubleshooting Manual page 159

Pre Dev val (pre-dialyzer deviation value) indicates the difference in conductivity
now versus one minute ago as monitored by cell #7. It continually varies but if
remaining less than 135 (0.135 mS) pre-dialyzer conductivity is stable enough to
run OLC test
Post Dev val (post-dialyzer deviation value) indicates the difference in
conductivity now versus one minute ago as monitored by cell #13. It continually
varies but if remaining less than 70 (0.070 mS) post-dialyzer conductivity is stable
enough to run OLC test
Pre Stbl Ct (pre-dialyzer stability counter) defaults to 90 and decrements if Pre
Dev val is less than 135. When it reaches 0 the OLC test can start. Pre Stbl Ct
increments towards 90 if Pre Dev val exceeds 135
Post Stbl Ct (post-dialyzer stability counter) defaults to 70 and decrements if
Post Dev val is less than 70 mS. When it reaches 0 the OLC test can start. Post
Stbl Ct increments towards 70 if Post Dev val exceeds 70
g) Is Pre Dev val greater than 135 OR Post Dev val greater than 70?
Yes See procedure number
No See procedure number
CO- 10.5.3 CHECK 'ACTUAL' CONDUCTIVITY STABILITY
a) Call debug screen 1, if NPHT is less than 600 press and hold the "1" numeric keypad until NPHT is
greater than 600. Ignore an "On Line PHT Failed" message if it occurs.
b) Place a calibrated external meter into the dialysate lines, close the shunt door, and allow two minutes
for the meter reading to stabilize.
c) Watch the meter's: 1) Temperature and then; 2) Conductivity EACH for one minute. Note the highest
and lowest values. Three possible scenarios:
1. If (and ONLY if) Temperature is unstable (i.e. varies greater than
92, SECTION 4 – TEMPERATURE PROBLEMS
2. If (and ONLY if) Conductivity is unstable (i.e. varies greater than
page 142, procedure number
3. If (and ONLY if) Temperature AND Conductivity are stable: See procedure number
(page 157).
CO-10.5.4 PERFORM MANUAL OLC TEST
a) Place the dialyzer quick connectors into the shunt and IMPORTANT! Close the door.
b) Call debug screen 6 and allow Count to reach 0 (if not already = 0).
c) Call the Kt/V window and perform the Manual OLC test. If the test won't start ("Can't Run OLC Test")
allow one minute then try again. If it still won't start turn the machine off then return to Dialysis
program. Allow five minutes for stabilization and perform the Manual OLC test.
d) Allow the Manual OLC test to complete (between 8 and 16 minutes).
e) See procedure number
CO- 10.5.3
CO- 10.5.4
CO- 5.0.0.
CO- 10.7.0 (page 158).
Fresenius 2008K Troubleshooting Guide
P/N 507298 Rev. B (Draft 1)
Section 5 – Conductivity/ On Line Clearance Problems
(page 157).
(page 157).
0.15°
C): Proceed to page
0.070
mS): Proceed to
CO- 10.5.4
Page 157