baxter ARENA - Dialysate Preparation

7. Dialysate Preparation
TABLE OF CONTENTS
7. DIALYSATE PREPARATION ........................................3
7.1 Dialysate Proportioning ................................... 3
7.2 Sodium and Bicarbonate Profiling .................. 5
7.3 Volumetric Proportioning System................... 5
7.3.1 Overview......................................................5
7.3.2 “A” and “B” Concentrate Reciprocating
Rotating Piston Pumps..............................8
7.4 Dialysate Proportioning Control.................... 10
7.5 Dialysate Flow Control ................................... 11
7.5.1 Deaeration Pump........................................11
7.5.2 Dialysate Pump ..........................................11
7.5.3 Supply Pump..............................................12
7.5.4 Pump Drive Circuitry.................................13
7.5.5 Flow Equalizer Drive Circuitry .................13
7.5.6 Dialysate Pressure Relief (Rinse) Valve....13
7.5.7 End-of-stroke Sensors................................14
7.6 Conductivity Measurement and Monitoring . 14
7.6.1 Conductivity Measurement........................14
7.6.2 Conductivity Monitoring ...........................14
7.6.3 Conductivity Calibration............................16
7.7 Central Concentrate Supply Systems........... 17
157-1278-914 Rev A 7-1
January 2004