Metrohm 818 IC Pump - Manual (Page 42)

6 Appendix
818 IC Pump / 8.818.1023 Instructions for Use
36
6 Appendix
6.1 Technical specifications
Provided that nothing to the contrary is mentioned, the
published data are typical values for the 818 IC Pump at
an ambient temperature of 25°C.
Type Serial dual piston with two valves
Pump capacity
Flow range 0.05...5.00 mL/min
Flow accuracy < 1.0 %
Flow constancy < 0.5 % (after unit warmed up)
Reproducibility of
eluent flow
< 0.1 %
Pressure
Pressure range 0...30.0 MPa (0...300 bar)
Resolution for pressure
indicator
0.1 MPa (1 bar)
Pressure measurement Piezoresistive measurement principle
Response time: 3 ms
Measurement volume: ca. 50 µ L
Accuracy of pressure
measurement
< 3 %
Residual pulsation < 1 %
Recorder output for
pressure indication
1 mV/MPa (1 mV/10 bar)
Time constant switchable: HIGH = 20 ms
LOW = 1 s
Safety shutdown
Function Automatic shutdown when upper and lower
pressure limits violated
Maximum pressure limit Adjustable between 0.1...30.0 MPa (1...300 bar)
Response time: 1 pump cycle
Minimum pressure limit Adjustable between 0.1 ... 30.0 MPa (1...300 bar),
inactive at 0 bar
Response time: 3 pump cycles
The cutoff function first becomes active 2 min
after the pump flow has been switched on.