Bio-Rad Quantity One 1-D Analysis Software - Manual (Page 331)

Quantity One User Guide
F-10
Fig. F-9. Densitometer Options dialog box.
Note that calibration is always on for the GS-800.
F.5.a Step Tablet Values
The built-in transmissive and reflective step tablets on your densitometer have
specific density values. Before scanning for the first time, you must enter the values
for your transmissive step tablet into the software. You can use the default values in
the software for the reflective step tablet.
Transmissive Step Tablet
Before you scan in transmissive mode for the first time, you must specify the values
for your transmissive step tablet.
First, make sure that the Transmissive checkbox is selected in the main acquisition
window, then click on the Options button. In the Densitometer Options dialog, click
on the Edit Step Tablet button. The Step Tablet Values for GS-800 Transmissive
dialog box will open.