Is it possible to autoclave the Varispenser 2(x) attached to a bottle?
No, it is not possible to autoclave the Varispenser 2/x attached to a bottle. The device must be placed horizontal on a cloth in the autoclave (according to operating manual chapter 5.9).
Is it possible to exchange the dispensing tube of the Varispenser 2 and 2x among each other?
Yes, it is possible to exchange the dispensing tube of the Varispenser 2 with a dispensing tube of the Varispenser 2x. Please note that the device is then capable of recirculating the liquid back into the bottle.
Do aspiration tubes of different lengths exist for Varispenser 2(x)?
Yes, aspiration tubes of different lengths are available to cover most bottle types.
Does the aspiration tube of the Varispenser 2(x) need to be cut diagonal for aspiration?
No, the aspiration tube of Varispenser 2(x) does not need to be cut diagonal, because two holes on the bottom side of the tube enable liquid uptake.
What is the "flexible discharge tube" used for?
The "flexible discharge tube" can be used to reach into small or narrow-standing tubes without tilting the botlle. More Information are available in the
White Paper 38.
For which liquids a drying tube is beneficial?
The drying tube should be used when working with fuming acids to avoid dilution. It can tehn be filled with e.g., calcium chloride or silica pills. When working with alkaline solutions filling of the drying tube with sodium hydroxide pills prevents carbonate formation and crystallization of the liquid. More Information are available in the
White Paper 38.
Is it possible to dispense sterile medium with the Varispenser 2(x)?
Yes, it is possible to dispense sterile medium with the Varispenser 2(x). We recommend the usage of a sterile filter at the back of the device to keep the sterility of the medium. More Information are available in the
White Paper 38.
Is it possible to adjust the Varispenser 2(x)?
Yes, it is possible to adjust the Varispenser 2(x) for liquids with different properties than water. Please refer to the operating manual for further information.
How can the Varispenser 2(x) be decontaminated?
The outer of the Varispenser 2/x can be wiped with lint-free tissue and 70 % ethanol. When sterilization of the inner parts is needed, the Varispenser 2/x can be autoclaved. The dispenser does not need to be dissembled for autoclaving, but it must be placed horizontal on a cloth in the autoclave (according to operating manual chapter 5.9).
Is the Varispenser 2/2x suited for dispensing 100% acetic acid (glacial acetic acid)?
Yes. 100% acetic acid can be dispensed with the Varispenser 2/2x. When using concentrated acids the usage of a drying tube is furthermore highly recommended. More information about the chemical resistance of the Varispenser 2/2x is available
here.
Can the Varispenser 2/2x be used to dispense a conc. sulfuric acid which contains potassium bichromate and silver sulfate?
Yes, you can use the Varispenser 2/2x for this application. Please notice, when using concentrated acids a drying tube should be connected to the Varispenser. More information about the chemical resistance of the Varispenser 2/2x is available
here.
Which physical limits does the Varispenser 2/2x has?
The device is intended for dispensing liquids with following properties: ambient temperature 15°C - 40°C , maximum density: 2.2 g/cm3, maximum vapor pressure: 500 mbar. Above 300 mbar slow aspiration is recommended to avoid boiling., kinematic viscosity: 500 mm2/s. More details are written in the
operating manual.
I bought a new Varispenser 2(x) and drops are visible inside the device. Additionally an intense smell was present when opening the cardbox. What is that?
Each Varispenser 2(x) is calibrated before packaging using distilled water. Afterwards each device is rinsed with an ethanol-glycerol solution to dry faster. The drops inside the device and the smell occur from this solution. The device should be completely dry after a few minutes outside the packaging.
What is the maximum viscosity limit for ViscoTips?
ViscoTips have been tested with liquds up to 14.000 mPa*s which equals clear liquid honey.
Why should I pre-wet ViscoTip?
We recommend pre-wetting of ViscoTip to avoid air bubbles. Furthermore, the pipetting results will be more precise and accurate after pre-wetting.
How can ViscoTip aspirate creamy liquids (skin cream, curd)?
Creamy liquids such as skin cream or curd flow very slowly and holes tend to form when a part of the liquid is removed. Therefore we recommend aspiration of creamy liquids in a circular movement to avoid air intake.
Furthermore, the liquid can be centrifuged prior to aspiration.
How can I decontaminate the Move It lower part?
With Xplorer plus, the lower parts are autoclavable. With Research plus the complete pipette is autoclavable.
The adjustment of cone spacing of the electronic model is not motorized. What is the reason?
When working with plates and multi-channel pipettes it is a prerequisite to have a rotatable lower part. Fixed lower parts make the work inconvenient and non-ergomic. For this reason Eppendorf has invented a lower part combining the factors "rotating" with "adjustable cone spacing". The fact, that the lower part is not fixed means that the motor for the cone space adjustment cannot be integrated in the pipette's upper part. Having a rotating lower part requires a motor in the lower part. This extra weight would have made the pipette "foot-heavy" and becoming non-ergonomic. For this reason Eppendorf decided for a manual cone spacing.
The Move It lower parts show indications for plates. I have a plate which does not fit into these formats. Can I nevertheless use the Move It pipettes?
First, please check with the option table, if you have the suitable Move It pipette availabe. Maybe you simply need a different model for your applications.
In case you have an atypical vessel format you can of course also use Move It if not exceeding the distance range. Use a ruler to check which Move It model is suitable for your atypic vessel type. Within this range all distances can be set. Therefore please proceed as follows:
1) Attach tips
2) Set the two format limiters to maximum width range
3) Use the rotating knob to adjust the space between the tips until fitting to the atypic vessel
4) Set one of the format limiter to this position
5) Set the rotating knob to the second vessel type
6) Set the format limiter to this tip distance
You can now work between these set limits by simply using the rotating knob.
Could you please send me an overview over the chemical resistance of the Move It lower parts?
The Move It lower parts are exclusively made of the high-tech materials we have already build in the
Research plus and Xplorer pipettes. Thus the chemical resistance table for the Research plus applies also for both, the Xplorer Move It lower parts and the Research plus Move It lower parts (but not for the upper part of Xplorer due to the electronics). The list is available on the eppendorf website (Research plus / Operating Manual)
How do the Move It Pipettes become serviced?
First of all, the Move It is a normal pipette which, accordingly to ISO 8655, needs to be calibrated at least once a year. You can send the pipettes to your service provider, to the eppendorf service or do the calibration yourself. Maintenance should be performed by service providers only.
Which vessel formats is Move It suitable for?
Based on the Move It model you can apply it with vessel types having a distance between 4.5 - 33 mm. Some examples: Plates (384- / 96-/ 48-/ 24-/ 12-well formats), 0.2 / 0.5 / 1.5 / 2.0 / 5 mL tubes, different vials,ect. Check the navigator table to find the model being suitable for your specific vessel-to-vessel distance. The adjustment of the distance between the cones is stepless giving you maximum flexibility to adjust to non-standard vessel formats.
Are Eppendorf products free of RNA?
All products certified with "PCR clean" are tested free of human DNA, DNase, RNase and PCR inhibitors. The following applies from our point of view: Where no human DNA is detected, there can also be no RNA, which is considerably more unstable.
What is the meaning of the PCR Clean seal?
For molecular-biological requirements Eppendorf offers a new standard for uniform purity specifications. All consumables marked with the "Certified PCR Clean” label are guaranteed free of human DNA, DNase, RNase and PCR inhibitors.
How do you make your Biopur products free of pyrogens?
All Biopur products are manufactured fully automatically under cleanroom conditions. This eliminates contamination of the disposables through contact with people. An independent laboratory checks that each individual batch is free of pyrogens.Additionally the products are sterilized by radiation or treatment with ethylene oxide.
What is the shelf life of Eppendorf Biopur products?
If the Biopur products are stored according to the information in the instruction manual they have a shelf life of 5 years. The minimum expiry date is printed on the label of the box.
Why are there double labels on the folding boxes, as "PCR clean" + "Sterile" or "PCR clean" + "Protein-free"?
Due to the modularization of purity grades, some products are labeled with more than one purity grade symbol. For example, the epDualfilter T.I.P.S. has the double seal "PCR clean "+ "Sterile" and the UVette the double seal "PCR clean" + "Protein-free" on the packing. The certification remains unaffected by the modularization.
Are batch-specific certificates for the new purity grades available in the internet?
Yes, the batch-specific purity grades can be downloaded at our
certificates homepage.
Can products of the previous and new modular purity grades (with new seals) be used simultaneously in one application?
Yes, if no batch attachment is required for the application, products of the old and new modular purity grades can be used, as their specifications are the same.
Can the IsoRack be centrifuged?
Please note that we offer a special IsoRack adapter for our 5810/R (swing-bucket rotor type A-4-81, flex buckets). In addition, the IsoRacks can also be centrifuged in the A-2-DWP and in the A-4-62-MTP. In this case, centrifugation is limited to a max. rotational speed of 3,700 rpm (max. 1,000 centrifugations).
