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TrueBlend
™
Maintenance and Repair
Edition: February 2007
129
NOTE
If the load cell is under tension or distorted by outside influences, this can
usually be recognized by a fluttering screen.
A display of +/- 20 g or more instead of ca. 0 g (at zero calibration) is an indi-
cation that the load cell should be replaced.
9.6.4 Load Cell Removal and Installation for Trueblend models, TB250, TB500 and TB900
DANGER!
E L E C T R I C S H O C K !
High voltages can cause life-threatening currents in the body and injury from
electric shock.
Î
Allow only trained and qualified electrical technicians to work on the elec-
trical system.
Î
Before any electrical work disconnect the unit from the power supply and
lock to prevent unauthorized persons switching it on.
CAUTION!
M A T E R I A L D A M A G E !
Forces and torque that are exerted on the load cell when installing and re-
moving it may damage the very sensitive load cell.
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Make sure that no force or torque is applied to the load cell.
Removal.
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Removal of one load cell (both load cells in the unit follow the same procedure)
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Remove the weigh bin
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The load cells are very sensitive and must be handled with care. Make sure
that when the load cell is being removed or installed that there is no torque
affects applied to the load cell.
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Disconnect the wiring that extends into the control box (see wiring diagram)
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Before removing the load cell look at the general location of all the items to see
how the items are installed before removing.
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Remove the load cell cover plate (figure 20, item 7) by loosening the load cell
cover plate holding nuts (figure 20, item 4) and sliding the cover upward off of
the studs.
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Unscrew the two hex nuts (figure 20, item 2 and 3) and remove the two hex
bolts (figure20, item 5) from the load cell and remove the weigh bin hanger
(figure 20, item 6).
Summary of Contents for TrueBlend TB500-4
Page 2: ......
Page 138: ...Appendix TrueBlend 136 Edition February 2007 11 1 2 Menu overview dosing unit...
Page 139: ...TrueBlend Appendix Edition February 2007 137 11 1 3 Menu overview conveying Optional...
Page 140: ...Appendix TrueBlend 138 Edition February 2007 11 1 4 System settings menu...
Page 141: ...TrueBlend Appendix Edition February 2007 139 11 1 5 Unit settings menu...
Page 142: ...Appendix TrueBlend 140 Edition February 2007 11 1 6 Conveyor settings menu...