This refurbished HP 1050 Quat Pump is in great condition. It has been tested at SpectraLab Scientific.
A 90 day warranty is included.
| Hydraulic System |
Dual-pistons in-series with proprietary servo-controlled variable stroke drive floating pistons and active inlet valve. |
| Flow Range | Setpoint from 0.001 to 9.999 ml/min in 0.001 ml/min increments. |
| Piston Displacement | 20 to 100 µl, automatic matched to flow rate or user-selectable. |
| Flow Precision | <0.3% RSD (typically <0.15%) based on retention time at 0.5 ml/min and 2.5 ml/min. |
| Pressure | Operating range from 0-400 bar (5880 psi) up to 5 ml/min; from 0-200 bar (2950 psi) up to 10 ml/min. Display in bar, psi or MPa |
| Pressure Pulsation | <2% amplitude (typically <1%), 1 ml/min isopropanol at all pressures >10 bar |
| Compressibility Compensation | User-selectable, based on mobile phase compressibility |
| Recommended pH Range | 2.3 to 12.5 (stainless steel version). Solvents with pH below 2.3 should not contain acids which attack stainless steel. 1.0 to 14 (TI series). |
| Gradient Formation |
Low pressure quaternary mixing/gradient capability using proprietary high-speed proportioning valve. Delay Volume 900 to 1100 µl dependent on back pressure. |
| Composition Range | 0 to 100% in 0.1% increments from four independent channels. |
| Composition Precision | ±0.25% absolute (typically ±0.15%) peak to peak, binary mixed water/acetonitrile from 0.5 ml/min to 5.0 ml/min without mixer. |
| Solvent Preparation | Four 1 liter bottles each with individually-regulated Helium sparger, cap and filter. |
| Oven Temperature Range | Ambient +5°C to ambient +60°C in 0.1°C increments. Display in °C, °F or K. |
| Oven Temperature Stability | ±0.15°C |
| Oven Capacity | Two 25-cm or three 20-cm columns. |
| Control | Integrated keyboard with function keys; parameter editing during run possible; keyboard lock; optional control by PC |
| Parameters | Flow rate, compressibility, stroke volume, upper and lower pressure limits, 2 external contacts; %B, %C, %D (for quaternary pump). Time-programmable Parameters: Flow rate, upper pressure limit, external contacts; %B, %C, %D. |
| Methods | Battery-backed storage of up to 10 methods. Automatic start up and shut down methods. Editing of stored methods possible in run. |
| Analog Output | For pressure monitoring, 2 mV/bar. |
| Communications |
Outputs: ready signal and two external outputs (one 24 V relay and one 30V (AC/DC) contact closure, both with 0.25 A. In-and outputs: start, stop and shut down signals. Optional interface for GPIB and RS-232C. |
| Safety Aids | Extensive diagnostics, error detection and display via front-panel LED\’s and status logbook. User-definable shutdown method activated in case of error. Leak detection and safe leak handling. Low voltages in major maintenance areas. Column pressure protection with maximum rate of pressure change of <20 bar/sec after a setpoint change. |
| Environment | 4°C to 55°C (constant temperature) with <95% humidity (non-condensing). |
| Power Requirements | Line voltage: 100-120 or 220-240 VAC ±10% |
