Introduction And Specifications
This manual explains the installation and operation of the PM-92 dual-head and PM-91 single-head Pump, as well as procedures for routine maintenance and troubleshooting. Read the entire manual prior to installation and start-up.
NOTE: We will refer to the pump as the PM-90 when when the information refers to both models.
The PM-92 is a reciprocating, dual-piston unit. It is designed for precise and reliable solvent delivery for isocratic elution at flow rates between 1.0 and 2000µL/min. Advanced features of the PM-92 pump include:
- Dual independently controlled reciprocating pistons each driven by a microstepping motor through a high efficiency ballscrew.
- Solid-state pressure transducers monitor each piston's head pressure along with system pressure to provide smooth crossover from one piston delivery to the next.
- Minimal flow-through volume. No pulse damper required for all but the most demanding applications.
- Optimized for microbore flow rates.
- Piston velocity profile and stroke length is software controlled.
- Pump performance is independent of system backpressure.
- Each head is removable as a single, precision-engineered assembly which may be interchanged in seconds.
- High- and low-pressure limit controls, for safety.
- Analog output for pressure monitoring.
- Provision for remote-control operation.
- Wetted materials: 316 stainless steel, sapphire, UHMW polyethylene, Teflon, PEEK.
The PM-91 is a reciprocating, single-piston unit. It is designed as an economical alternative to the PM-92 for isocratic elution at flow rates between 1.0 and 1200µL/min. Advanced features of the PM-91 pump include:
- Reciprocating piston driven by a microstepping motor through a high efficiency ballscrew.
- Solid-state pressure transducer monitors head pressure and system pressure independently.
- Microprocessor control takes a 'snapshot' of system pressure just prior to refilling and drives the plunger to quickly refill and pressurize the mobile phase to the 'snapshot' pressure before resuming the desired delivery flow rate.
- Fast refill and pressurization in combination with a pulse damper provides minimal flow and pressure fluctuation.
- Optimized for microbore flow rates.
- Pump performance is independent of system backpressure.
- The pump head is removable as a single, precision-engineered assembly which may be interchanged in seconds.
- High- and low-pressure limit controls, for safety.
- Analog output for pressure monitoring.
- Provision for remote-control operation.
- Wetted materials: 316 stainless steel, sapphire, UHMW polyethylene, Teflon, PEEK.
The PM-90 series pumps have been engineered for durability, and with proper maintenance should provide years of reliable service.
SPECIFICATIONS
| HEIGHT | 4.6 inches |
| LENGTH | 9 inches |
| WIDTH | 11 inches |
| WEIGHT | 15 pounds |
| FLOW RATE | 1-2000 (PM-92) or 1-1200 (PM-91)µl/min |
| FLOW PRECISION | better than 0.3% RSD |
| FLOW REPEATABILITY | 0.3% |
| PRESSURE RANGE | 0-5000 PSI (0-34 bar) with selectable limits |
| INPUT VOLTAGE | 100/120/220/240 vac 50/60 Hz |
| POWER | 2A (max) @ 120 VAC 50/60 Hz |
