User Manual

Labconco Operating Instructions 5242600, Rev. B 4/27/07, ECO E275 10 of 20
Option 3
Calibration: The pressure sensors inside the controller can be calibrated using atmospheric
pressure (single point calibration) or atmospheric pressure and a specific pressure level (two
point calibration). Two point calibration provides increased accuracy; however, Labconco
recommends that only the single point calibration be used because it does not require a calibrated
pressure measurement standard. When “Calibration” is selected, the display screen below
appears. The keys adjacent to the up and down arrows on the lower right of the display are used
to select one of the options. After toggling up or down, push the NEXT key to select the option.
Note: If option 2 or 3 above is selected, an accurate, traceable pressure measuring device must
be connected to the Labconco pressure sensors. Consult Labconco for further instructions for this
type of calibration.
Option 1 above is normally selected. Both doors must be open so atmospheric pressure is
available to both the glove box main chamber and transfer chamber. Select the NEXT key to
advance the screen to sensor offset for Option 1. The display screen changes are shown on the
next page for Option 1.
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