5.5.1Removing the Pulse Damper | SSI America 90-2581 REV B manual

5.4Check Valve Cleaning and Replacement

5.4Check Valve Cleaning and Replacement

Many check valve problems are the result of small particles interfering with the operation of the check valve. As a result, most problems can be solved by pumping a strong solution of liquid, laboratory grade detergent through the check valves at a rate of

1 mL/min for one hour. After washing with detergent, pump distilled water through the pump for fifteen minutes. Always direct the output directly to a waste beaker during cleaning. If this does not work, the check valve should be replaced.

CAUTION: When removing the check valves, keep them in the orientation shown below the entire time they are not installed in the pump head. The assemblies may fall apart, parts may be lost, and they may not operate properly when re-assembled.

5.5Pulse Damper Replacement

5.5.1Removing the Pulse Damper

WARNING: There are potentially lethal voltages inside the pump case. Disconnect the line cord before removing the cover. Never bypass the power grounds.

1.Make certain that the system has been depressurized. Unplug the power cord and remove the cover.

2.Disconnect the tubing from the pulse damper.

3.Disconnect the transducer from the circuit board.

4.Remove the four screws that secure the pulse damper from the underside of the pump.

5.Remove the pulse damper.

5.5.2 Pulse Damper Refurbishing

Refurbishing the pulse damper is a time-consuming procedure. You may want to return the pulse damper to have it

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SSI America 90-2581 REV B manual 5.5.1Removing the Pulse Damper, Pulse Damper Refurbishing, 5.5Pulse Damper Replacement

Contents

Binary Solvent Delivery Module Operators ManualPage 1.INTRODUCTION 1.1.1 Pump Features fFast & easy setup 1.1.2 Wetted Pump Materials 1.1.3 Self-FlushingPump HeadMicroprocessor advanced control 1.1.4 Self-Flushand Seal Life It is recommended that the Self Flush feature be used to improve seal life in a number of applications. In particular, as stated above if pumping Buffers, Acids/Bases or any inorganic solution near saturation, the pump should utilize the Self Flush feature. With every piston stroke, an extremely thin film of solution is pulled back past the seal. If this zone is dry without use of Self Flush, then crystals will form with continuous operation, which will ultimately damage the seal Flow Rates 2.2Location/Environment 2.INSTALLATION2.1Unpacking and Inspection 2.3Fluid Connections & Priming Connect wash solution inlet and outlet tubing SELF-FLUSHPUMP opaque to the flush housing as shown 2.5.1 Solvent Out-gassingand Sparging 2.4Electrical Connection2.5Solvent Preparation 2.5.3 Filtration 2.6.1Mobile Phase Reservoirs2.5.2 Cavitation 2.5.4 Initial system pressurization Daily 2.6.4 Priming the Pump and the Flushing Lines 2.6.2 Self-FlushSolution2.6.3 Inlet Tubing and Filters 2.6.6 Long Term Pressure Calibration Accuracy 2.7.1Isopropanol Flush 2.7.2 Packaging for Shipping2.7Preparation for Storage or Shipping 3.OPERATION 3.1.1Control Panel Non-volatileMemory Reset If the pump is operating erratically, there is the possibility that the memory has been corrupted. To reset the memory and restore the pump to its default parameters, press and hold the UP-ARROWbutton when the power is switched on. Release the button when the display reads rES. The parameters stored in non-volatilememory, i.e., the flowrate, the pressure compensation, the voltage/frequency select, the lower pressure limit, and the upper pressure limit will be set to the factory default values. The head type setting is the only parameter not changed by the non-volatilememory reset function. If the firmware is upgraded to a newer version, a non- volatile memory reset will automatically occur the first time the power is switched on 3.6Symbols 3.5Rear Panel Remote Input 4.1.2 Pump Cycle 4.THEORY OF OPERATION4.1.1Liquid System Flow Path 4.1.3 Pulse Damping 4.2.3 Remote Interfacing 4.2.2 DC Power Supply4.2.1 Microprocessor Control 4.2.4 Motor Stall DetectorPage 5.2.1Removing a Pump Head 5.MAINTENANCE5.1.1 Inlet Filters 5.1Filter Replacement 3.Remove the inlet line from the inlet check valve OUTLET FLUSHING CHECK VALVE OUTLET FLUSHING 5.2.2 Cleaning the Pump Head Assembly 1.Inspect the piston seal cavity in the pump head. Remove any foreign material using a cotton swab, or equivalent, and avoid scratching the sealing surfaces. Repeat for the self-flushhousing. Be sure no fibers from the cleaning swab remain in the components 3.If the check valves have been removed, tighten the check valves on stainless steel pumps to 75 inch-poundsor enough to seal at maximum pressure. Do not exceed maximum torque. For Bioclean PEEK pumps, tighten each check valve firmly by hand. Do not go ¼ turn past finger tight 5.2.3 Replacing Piston Seals Lower than normal pressure, pressure variations, and leaks in the pumping system can all indicate possible problems with the piston seal. Depending on the fluid or mobile phase used, piston seal replacement is often necessary after 1000 hours of running time 1.Remove the pump head as described in Section 5.2.1. Use caution so as not to damage the sapphire piston 5.2.4 Changing the Piston 5.Condition the new seal as described in Section 5.2.5Replacing the Pump Head 5.3Conditioning New Seals 5.4Check Valve Cleaning and Replacement 5.5.1Removing the Pulse Damper5.5.2 Pulse Damper Refurbishing 5.5Pulse Damper Replacement 5.5.3 Pulse Damper Installation 5.6Cleaning the Pump 5.8Other Pump Maintenance 5.7Lubrication 7-14 5.9Fuse Replacement 1.Unplug the unit 2.Remove the cover You Notice 6.PROBLEM SOLVINGQuick Guide to Problem Solving This May Mean 7.LIST OF REPLACEMENT PARTS 880201 Seal Kit, Aqueous, 5mL Part Description APPENDIX AA.1.1 Hardware Implementation Part Number Command Interpreter A.1.3“/” character Page A.2.1 Pressure Fault and Motor Stall Fault Output A4-pinterminal board connector and a 10-pinterminal board connector are provided on the back panel. Any device capable of providing the proper run/stop logic level, flowrate control frequency, or flowrate control voltage can be used as a remote controlling device for pump operation via this connection. The terminal board connectors can be removed for ease of connecting wires, if desired, by pulling firmly rearward and should be reinserted firmly afterward A.2.2 General Information on Inputs the EVENT 1 terminal and the EVENT 2 and EVENT 3 terminals is affected. EVENT 2 is Normally Closed connected to EVENT 1 until a fault occurs and then opens. EVENT 3 is Normally Open not connected to EVENT 1 until a fault occurs and then closes A.2.4 Run and Stop Inputs The PUMP-RUN, PUMP-STOP,and ENABLE IN inputs operate from an internal 5 VDC source and each one draws approximately 0.008 amps when connected to COM. To activate either the PUMP- RUN, PUMP-STOP,or ENABLE IN input connect it to COM. Any device capable of switching 0.008 amps can be connected between the PUMP-RUN, PUMP-STOP,or ENABLE IN input and COM, such as: a switch contact, a relay contact, an open collector output, an open drain output, or any output with a high logic level output of 3.8 to 6.0 volts and a low logic level output of 0.0 to 0.5 volts. A switch contact or a relay contact is preferred since this type of connection will provide isolation between the pump and the controlling device. The COM terminal is internally connected to the pumps chassis ground and should be connected to the controlling devices ground or zero volt terminal when the controlling device has an open collector output, an open drain output, or any output with logic level output A.2.4 Enable Input When activated ENABLE IN is at a low logic level, the ENABLE IN input disables flowrate control on the front panel and enables flowrate control on the back panel APPENDIX B EZ GRIP FITTING GUIDE Scientific Systems Inc Warranty Statement A-10