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Contents 1.Safety Instructions 2.Purpose 3.Limitations of use 4.Operating limitations 5.Operating exclusions 6.Operating and Control Elements 7.Pipetting 8.Checking the Volume 9.Accuracy Table 10.Adjustment 11.Autoclaving 12.UV sterilization 13.Servicing and Cleaning 14.Disassembling the Manifold 15.Ordering Information • Accessories 16.Spare Parts 17.Troubleshooting 18.Repairs • Calibration Service 19.Warranty Information 20.Disposal...
1. Safety Instructions Please read the following carefully! This instrument may sometimes be used with hazardous materials, operations, and equipment. It is beyond the scope of this manual to address all of the potential safety risks associated with its use in such applications.
2. Purpose Air-displacement pipette for pipetting aqueous solutions of medium density and low to medium viscosity. 3. Limitations of Use The instrument is intended for the pipetting of liquids within the following limitations: - Temperature of both the instrument and solution should be between 15 °C to 40 °C (59 °F to 104 °F).
Finger rest Volume display * Hand grip Manifold Tip cone (Fig. shows VITLAB® micropipette 8 channels) Note: Optimum analysis results can only be obtained with * Volume display quality tips. We recommend The figures in the display are read from top to BRAND®...
7. Pipetting 1. Fitting the tip Use the correct tips according to the volume range or the color code. Ensure that the tips are securely seated. Pipette tips are disposable items! 2. Volume setting Select the desired volume by rotating the volumes setting wheel. Avoid twisting and abrupt rotating motions during this adjustment.
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5. Discharge sample a) Place the pipette tips against the wall of the vessel. Hold the pipette at an angle of 30-45° relative to the container wall. b) Press the pipetting button slowly to the first stop and hold it down. For serum and liquids of high viscosity or low surface tension, observe adequate waiting time to improve accuracy.
8. Checking the Volume Depending on use, we recommend inspection of the instrument every 3 to 12 months. The cycle can, however, be adjusted to individual requirements. The gravimetric testing of the pipette volume is performed according to the following steps and is in accordance with DIN EN ISO 8655, Part 6.
10. Adjustment The instrument is permanently adjusted for aqueous solutions. If the pipette operation is clearly inaccurate, or if the instrument must be adjusted for solutions of different densities and viscosities or specially-shaped pipette tips, adjustments can be made. Check the volume, determine actual value (see page 9). Remove the cover: Push the hook forward, raise it slightly and then pull it back.
11. Autoclaving The pipette is completely autoclavable at 121 °C (250 °F), 2 bar absolute (30 psi)with a holding time of at least 15 minutes, according to DIN EN 285. 1. Eject the pipette tips. 2. Autoclave the complete pipette without any further disassembling. 3.
13.Servicing and Cleaning The three main components of the manifold can be easily separated and disassembled for servicing, cleaning or replacing parts. The procedures are illustrated on the following pages. Note: The changing of the O-rings on the individual nose cones is described in detail in the instructions enclosed with the spare part.
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13.2 Servicing In order to assure proper functioning, the VITLAB micropipette -8/-12 should be serviced and cleaned at ® regular intervals. What is to be inspected? a) Inspect nose cones, pistons and seals for damage and contamination. b) Test the sealing of the instrument. To do this aspirate a sample, and then hold the instrument in a vertical position for about 10 sec.
14. Disassembling the Manifold 14.1 Removing of nose cones and seals 1) Disconnect the manifold from the handle. 2) Turn both closures of the manifold housing cover 90° (e.g., using a coin) and slide off the housing. 3) Push the mounting tool (M) (supplied with the pipette) on the nose cone and unscrewit.
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If required, lubricate the piston lightly with the supplied silicone oil. (In the VITLAB® micropipette -8/-12 30-300 μL unit, remove the additional pressure ring from the piston for cleaning.) Push the seal on the piston with its flat side facing upward.
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14.2 Removing of pistons for cleaning or replacing 1) Disconnect the manifold from the handle. 2) Turn both closures of the manifold housing cover 90° (e.g., using a coin) and slide off the housing. 3) Remove both outer Phillips screws on the nose cone assembly. Attention: Do not loosen the central guide rod (Z)! 4) Pull the piston and nose cone assembly apart and separate.
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6) Remove the piston nut with piston spring and pull out the piston. 7) Insert the cleaned or new piston and piston spring ( a ). Screw on the piston nut and tighten with the mounting tool. Replace the stroke springs ( b ). 8) Reassemble the manifold.
-8/-12 Cat. No. VT003. 1672000 16. Spare Parts Parts will differ slightly depending on nominal volume of instrument. (Fig. shows spare parts for VITLAB® micropipette -8/-12, 10-100 μL). Seal Piston Nose cone O-Ring * incl. seal, O-ring and mounting tool.
17.Troubleshooting Problem Possible cause Corrective actio Tip dripping - Unsuitable tip - Only use high-quality tips (instrument leaks) - Tip not seated tightly - Press tip on firmly The instrument does not - Seal contaminated - Clean seal aspirate or aspirates too - The seal or cone is damaged - Replace seal or shaft little;...
18. Repairs - Calibration Service If a problem cannot be fixed by following the troubleshooting guide, or by replacing spare parts, then the instrument must be sent in for repair. For safety reasons, instruments returned for checks and repairs must be clean and decontaminated! 18.1 Return for repair a) Clean and decontaminate the instrument carefully.
19. Warranty We shall not be liable for the consequences of improper handling, use, servicing, operating or unauthorized repairs of the instrument or the consequences of normal wear and tear especially of wearing parts such as pistons, seals, valves and the breakage of glass as well as the failure to follow the instructions of the operating manual.
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