A control apparatus is described comprising: a plurality of microprocessors (44,50); a plurality of storage registers (46,52), the number of storage registers being at least equal to the number of said microprocessors, one of said storage registers being associated with each of said microprocessors, each of said microprocessors being arranged to control and/or monitor the same common parameters (xxx,yyy), each of said microprocessors applying values of control constants stored in the associated storage register in monitoring and/or controlling said parameters; manually controllable input means (6) for supplying new values of said control constants.
The control apparatus according to the invention is intended primarily for the control of hemodialysis, that is to say the purification of the blood of patients with diminished renal function or wholly lacking such function.
The control apparatus according to the invention is characterized by digital duplication means (48) for digitally duplicating the new values of the said control constants supplied by said input means (6) and entering said duplicated values into all of said storage registers (46,52), whereby identical values for said control constants are entered into all of said storage registers; and display means (9,10) for displaying said new values of said control constants as entered into at least one of said storage registers.