Chapter 2
SQM-242 CoDep
2-7
2.6 View Menu: Input Setup
The Input Setup screen configures each input on the SQM-242 and SAM-242 cards.
Inputs are numbered consecutively, starting with Card 1 (Sensors 1 to 4), then Card 2
(Sensors 5 to 8), etc. The SAM-242 analog input card is shown as Analog 1 to 4.
Sensors Frame:
Settings in this frame control a sensor’s calculation of rate and
thickness. They also allow a sensor to be assigned as a Final Thickness monitor,
independent of any output control assignment.
Density:
The density of the material measured by this quartz sensor, in grams per cubic
centimeter. Material density can be found in the appendix and numerous handbooks.
Z Factor:
ZFactor compensates for the mechanical stress a material causes to the
quartz crystal. Z-Factor has an effect only during the last 70% of crystal life. If you
cannot find the ZFactor of a material, set the value to 1 and change crystals when the
Crystal Life approaches 70%. See the appendix for more information.
Note
: The appendix contains additional technical information on these settings and the
equation governing quartz crystal monitor (QCM) calculations.
