9. Disinfection
conductivity threshold value, then the Instrument assumes that the
correct chemical was properly infused.
If the DIM is not enabled or the disinfection chemical is
formaldehyde, the Instrument will be rinsed with fresh water for 2
minutes if the conductivity was greater than 1 mS/cm at the start of
prerinse.
When a prerinse cycle is initiated the Instrument will perform the
following actions.
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It displays the message “Put Dialyzer Connectors on Rinse
Block” in the instruction window if either sensor for the
dialysate connectors does not detect the presence of a
connector.
It displays the message “Chem Disinfect: Pre-Rinse” in the
instruction window when the concentrate and dialysate
connectors are on the rinse block.
It sets the “A” concentrate pump rate to the 35:1 proportioning
ratio rate.
It sets the “B” concentrate pump rate to the 20.13:1
proportioning ratio rate.
It opens the rinse valve (dialysate pressure relief valve).
It cycles the bypass valve into bypass for 5 seconds every
minute.
It cycle the dialysate filter purge valve #2 if Dialysate Filter
hardware is installed (refer to Section 24).
It enables the level control of the incoming water valve.
It de-energizes the recirculation valve.
It holds the elapsed time counter when any of the following
conditions occur:
o No Incoming Water alarm.
o Flow Restricted alarm.
o No Dialysate Flow alarm.
o Concentrate connectors are not on the rinse block.
o Dialysate connectors are not on the rinse block.
157-1278-916, Rev A 9-23
March 2004
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