Fresenius Medical Care 2008k Technical Manual page 207

6. With the machine in Dialysis Mode, press the [Dialysate Flow on/off]
key to start the flow. Observe that liquid is drawn from the buret in
discrete steps. Allow the machine to run and pump fluid from the buret
for about 20 strokes, to prime the pump.
N
Note: Do not let the buret run dry so that air can enter the system.
7. Refill the buret exactly to the full mark. Press the [Dialysate Flow on/off]
key to start the flow and count exactly 20 pulses of water drawn from the
buret, then stop the flow.
N
Note: If DOUBLE=1 on debug screen #1 then count each pulse of the
double stroking bicarbonate pump.
8. Measure the amount of water drawn from the buret carefully to within
0.05 ml (within 1/2 division on a buret calibrated in 0.1 ml increments).
Verify that this value is between the displayed limits of AMIN and
AMAX for the acid pump volume and BMIN and BMAX for the
bicarbonate pump volume.
9. If a pump volume falls outside of the permitted error, repeat the above
procedure to ensure that you are getting consistent results before re-
calibrating the machine.
Fresenius 2008K Preventive Maintenance Procedures
P/N 507297 Rev. A
Page 45