Hach-Lange Piston pipette - Manual (Page 24)

22
Section 6 Calibration
The pipette is calibrated in the factory with distilled water at
22 °C/72 °F. No recalibration is needed for routine use. The
pipette can, however, be recalibrated for other temperatures
and solutions of different viscosities. An appropriately
sensitive analytical balance, a small beaker and distilled water
are needed to carry out the calibration.
Important Note: If either the handle or the piston is replaced,
the pipette must be recalibrated. If the O-rings or the tip cone
are replaced, the calibration should be checked.
6.1 Checking the calibration
1. Set the pipette volume as follows in Table 1 Checking the
calibration :
Table 1 Checking the calibration
Pipette
(µL)
Volume setting
permissible
weight range
(mg)
10 10 9.8–10.2
20 20 19.8–20.2
50 50 49.5–50.5
100 100 99.2–100.8
200 200 198.7–201.3
500 500 497.0–503.0
1000 1000 994.0–1006.0
2000 2000 1990.0–2010.0
200–1000 300 298–302
1000–5000 2000 1990–2010
AV_pipette.book Seite 22 Donnerstag, 8. Dezember 2005 3:56 15