Interdependency Of Column Pressure And Maximum Flow Rate - Thermo Scientific Dionex UltiMate 3000 Series Operating Instructions Manual

UltiMate 3000 Series:
NCS-3500RS and NCP-3200RS

5.5.2 Interdependency of Column Pressure and Maximum Flow Rate

5.5.2.1 NC Pump with a ProFlow Flow Meter
Overview
Each flow channel of the ProFlow flow meter comprises a closed control loop that includes
the pump (nos. 1a and 1b) and a thermal flow sensor (nos. 5a and 5b). The flow sensors
measure the current flow rates and the pump speeds are controlled so that the flow rates
match the set values. Both partial flows are mixed in a microfluidic Y piece (no. 6) at the
flow meter outlet.
Fig. 53: Functional blocks of the NC pump with ProFlow flow meter
No. Element
1a / 1b Flow-controlled pump, left (A) and right (B)
2a / 2b Dual-piston pump, left / right
3a / 3b Filter unit, left / right
4a / 4b Primary pressure transducer, left / right
5a / 5b Thermal flow sensor, left / right
6 Y piece
7 Flow meter outlet, capillary connection to the other modules of the HPLC
system
8 Flow meter module
Page 110 Operating Instructions