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10.16-7
Adjustment of dilution ratio of acetate concentrate
Adjust the dilution ratio when acetate dialysis mode is selected.
Set dialysate preparation components to water and acetate concentrate in maintenance mode 5
screen and operate machine in preparation or preparation end process. Measure concentration of
prepared dialysate specimen after prepared dialysate conductivity is stabilized. If required, adjust
the dilution ratio.
(1) Check that current process is dialysis wait.
(2) Press [F 5] SW to display maintenance mode 5 screen.
(3) Press [F 3] or [F 4] SW to blink "5.MODE".
(4) Press [F 1] or [F 2] SW to set "W+AC" for selecting water and acetate concentrate as
dialysate preparation components.
(5) Connect the concentrate to concentrate connector.
(6) Press [PREP.] SW to shift to dialysis wait process to start dialysate preparation.
(7) Wait until prepared dialysate conductivity (mS/cm) is stabilized by monitoring "6.COND.
W+AC".
(8) After the stabilization, take prepared dialysate specimen from sampling port.
(9) Measure the specimen concentration (mmol/L) using separately available concentration meter.
It is possible to derive the concentration by converting conductivity measured using any
conductivity meter to the concentration by referring to conversion Table.
(10) Check that [Measured concentration (mmol/L)] is equal to [Theoretical concentration of
"3.THEORETICAL W+AC"]. If not so, change dilution ratios of "1.VCa W+AC RATIO" and
"2.VCb W+AC RATIO" to adjust them.
Calculate each of the changed dilution ratios roughly by application of the below formula:
New dilution ratio
Theoretical concentration of diluted acetate concentrate×Current dilution rate
Measured concentration
New dilution ratio: dilution ratio after adjustment
Input of
1
AA.AA
into "1.VCa W+AC RATIO" and "2.VCb W+AC RATIO"
Current dilution ratio: dilution ratio before adjustment
Indication of
1
BB.BB in "1.VCa W+AC RATIO" and "2.VCb W+AC RATIO"
Measured concentration Concentration measured using meter (mmol/L)
Theoretical concentration of diluted acetate concentrate: (mmol/L)
Indicated in "3.THEORETICAL W+AC"
(11) After the adjustment, wait until indicated conductivity is stabilized.
(12) Take dialysate specimen again from sampling port to measure its concentration using
concentration meter. Repeat the adjustment until [Measured concentration (mmol/L) becomes
equal to theoretical concentration of . "3.THEORETICAL W+AC".