Conair TrueBlend TB500-4, User Manual

Page: 58 / 150

Operation TrueBlend ™
56 Edition: February 2007
7.7.2 Calibrating
NOTE
Conair recommends performing a manual calibration at start-up or material
change with a dramatic change in the bulk density of the material being
blended. This allows the blender to reach its optimal working point more
quickly.
7.7.2.1 Calibrating load cell(s):
Calibrating scales - zero calibration
The scales are calibrated at the factory. The zero calibration is made to set the
scales to "0". During shipment and/or operation minor deviations may occur, e.g.
from single pellets of material remaining in the weigh bin or positioning of the
weigh bin on the load cell support bracket. However, the controller runs an inter-
nal zero calibration tare before every cycle.
Calibrating scales - full calibration
A manual full weight calibration is only required after a fault, replacement of load
cell(s) or for scale certification. The calibration must be conducted by authorized
personnel only. The reference weights are as shown below for the various mod-
els:
Conditions
The weigh bin must be empty.
Î In the "Overview" screen press the
TrueBlend icon.
The "TrueBlend Status" screen opens.
Î Press .
The "Settings" screen appears.
Î Press to open the "Scale Calibra-
tion" screen.
The "Scale Calibration" screen appears. It
can only be calibrated with the blender
stopped. The main power remains on.