1. INTRODUCTION Fig. 1 VWR UHP (Ultra High-Performance) pipettors are designed for general laboratory use. Pipettors can be used for measurement and transfer of aqueous solution, Pipettor volume is identified by the color of counter cap acids, bases and enzyme assay applications.
WARNING! Accuracy errors and repeatability have been determined • Follow the laboratory work safety regulations. with VWR tips, using a gravimetric method, performing at least 10 measurements of distilled water at the tempera- • Exercise extreme caution while pipetting chemically ture 20°±1°C, according to EN ISO 8655 standard.
3. PIPETTING RECOMMENDATIONS Observing the following recommendations will ensure accuracy and repeatability of liquid sampling. • While operating VWR UHP pipettor the volume setting should be locked - the adjustment knob in its lower position (fig. 2C).
VWR UHP 01.09.2010 5j 240.9001.0.09 1-09-10 16:01 Page 8 ENGLISH • Operate the pipettor pushbutton slowly and smoothly 4. ASPIRATING AND DISPENSING LIQUIDS when liquid aspiring and dispensing. 4.1 ASPIRATING LIQUIDS • The depth of tip immersion in the aspired liquid should be kept at necessary minimum, and should remain constant during aspiration (Table 2.)
VWR UHP pipettors are calibrated by gravimetric the tip (fig. 4D). method, using VWR tips and distilled water, at the tem- • Holding the pushbutton depressed remove the pipettor, perature 20°±1°C, according to EN ISO 8655 standard.
VWR UHP 01.09.2010 5j 240.9001.0.09 1-09-10 16:01 Page 12 ENGLISH CAUTION: The pipetting procedure should be conduct- • Set the adjustment knob (fig. 1B) in its lower position, ed in accordance with the rules described in sections 3 • Remove the cap (fig. 1D) using the calibration key and 4.
VWR UHP 01.09.2010 5j 240.9001.0.09 1-09-10 16:01 Page 14 ENGLISH Descriptions of the parts are given in fig. 1, 6, 7 and 8. CAUTION: Recalibrate the pipettor after replacing the Fig. 6, 7 and 8 can be found in section 8.
VWR UHP 01.09.2010 5j 240.9001.0.09 1-09-10 16:01 Page 16 ENGLISH Problem Cause Instructions Problem Cause Instructions The liquid is Decrease the The inside of the dispensed too fast dispensing speed pipettor is contami- Droplets of liquid nated due to aspira-...
Pipetting spring J: Shaft cap K: Ejector M: Compression washer N: Ejector bush WARNING! Use only accessories recommended by VWR and original spare parts. Technical service Web Resources Visit the VWR’s website at www.vwr.com for: • Complete technical service contact information •...
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(3) years from date of purchase. If a defect is present, VWR will, at its option, repair, replace, or refund the purchase price of this product at no charge to you, provided it is returned during the warranty period.
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