ProStar 210/218 Solvent Delivery Modules. For ALL applications (analytical to prep) Variety of pump...
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Transcript of ProStar 210/218 Solvent Delivery Modules. For ALL applications (analytical to prep) Variety of pump...
ProStar 210/218 Solvent Delivery Modules
For ALL applications (analytical to prep)
Variety of pump head materials & configurations
ProStar 210/215 Solvent Delivery Modules
Available Pumps
Major features
•Two, three or four pump gradients
•Different sizes for different flow rates
•Different materials
•Optional piston wash
•Different pressure ratings (dependent on pump type)
ProStar 210/215 Pumps
Hydraulic design
System configurations
Electrical connections and signals
Other capabilities
User interface
Product specifications
Hydraulic Design
Ball and seat check valve
Pump head
Pump Head Materials
Stainless steel
• Good for most general applicationsTitanium
• Better for high salt content applications, superior corrosion resistance
• Perceived better for biological applications• More expensive, includes piston washPeek
• Better for high salt content applications• Perceived best for Life Science applications• More expensive, + piston wash. Limited pressure
Pump Head Feature
•Piston wash
• Either Holds liquid (water) or rigged for constant recycle
• Back of Piston is rinsed automatically when it moves back-and-forth in the water
•Only on some pump heads
•Useful when using salt mobile phases
•Perceived by customers as always good
•More expensive
Pump Head
Wash head Standard head
Wash head Standard head
10WS 10SS
Pump Heads
Pump head
•Programmable re-fill time
• 100 msec to 1 sec
•Faster gives less pulsations
•Slower gives less possibility of Priming Issues with viscous mobile phases
210 218
SS and TI PEEK SS and TI PEEK
Head (mL/min) (psi) (psi) (psi) (psi)
5 0.01-5 8700 n/a 8700 n/a
10 0.01-10 8700 4000 8700 4000
25 0.025-25 4600 4000 6000 4000
50 0.05-50 2000 2000 4000 4000
100 0.1-100 1200 1200 4000 2000
200 0.2-200 n/a n/a 3500 n/a
Pressure limits
Pressure module with pulse damper
•Flow rate dependent
• 10, 50,100 and 200 mL/min
•Monitors pressures for PMIN and PMAX calculations
•Monitors pressures for compressibility compensation
• Enter 2 parameters for any solvent
•Corrects flow rate on the piston’s initial forward movement
•Teflon Membrane Design with Hexane offering damping resistance
•Different sizes for different flow rates
Transducer Pulse Damper Design
Body
Transducer
Lock Nut
Teflon membrane
Cap
Binary and Ternary Gradient Systems
•Two or three pumps, high pressure proportioning + high pressure mixing
•Can be a mixture of 210/218 pumps
•Can be different pump heads but the flow will be limited to the smallest head
•Only need ONE pressure module/pulse damper
Ternary gradient hydraulics
Pump C
Pump B
Pump A
Injector valve
Tee
Mixer
Detector
Back pressure regulator
Flow Accuracy
Flow accuracy specification
• +/- 1% of set flow
• +/- 0.05% of maximum flow
Measured %RSD =0.35%
Absolute flow can be adjusted using compressibility compensation
Flow precision
Flow precision +/- 0.1% RSD
• Measured isocratic
– 0.045% RSD overall
– 0.02% RSD best 8 consecutive runs
• Measured gradient
– 0.1% RSD overall
– 0.04% RSD best 8 consecutive runs
Gradient delay and accuracy
Gradient linearity -100%
Gradient linearity - 10%
Proportioning accuracy and precision
Precision - 0.3% to 0.03% absolute
Accuracy - 0.5% absolute - usually on the step from 0%
Proportioning accuracy and precision
• 1% steps
Proportioning accuracy and precision
• 10% steps
Isocratic precision
Mixers
Dynamic mixer
• Always needed for 210 and 218 to keep composition mixed efficiently
• Built into 210 and 218. Turns on when pump is turned on. Dual Chamber, dual elements rotating opposite of each other.
“T” mixer
• used for ternary gradient systems before dynamic mixer
Gradient delay and accuracy - results
Gradient delay - ( mixer delay) 0.55 mL
Mixer flush out (mixer flush out) 2.22 mL
User interface
•2 line display
•Numeric keypad
•Unique Features
• Negative times
• Single point control for multi-pump and UV detector
– Advised to use controller
•Control 320 UV detector
Back Panel
Electrical Connections
Outputs
• 3 contact closures
• Injection mark
• Time programmed mark
• + 5 volts
• Analog out
– Solvent composition
– Flow
– Pressure
– Wavelength Control of 320
Electrical Connections
Inputs
• Stop (Stop pump and method)
• Hold (stop method, keep pump running)
• One 22-bit ADC for data handling in Star Workstation
Other features
•Flow programming
•100 method - unlimited lines
•Built in automation
•Failure operation - shut down method
•Control of units for pressure display (Mpa, psi, Bar)
•Solvent compressibility compensation
•Single point control of gradient
Problems
Worn Seals
Dirty Check Valves
Un-primed pump
Bad fittings
---------------------------------
High Pressure
Fluctuating Pressure
Low Flow
Communications problems
Customer chemistry