Calibration
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5.5 C-Cal Calibration
When adequate test weights are not available, the MSI-4260 IS can be calibrated using a programmed constant calibration
which is referred to as C-Cal. To use C-Cal, a C-Cal number must be known from a previous calibration. MSI supplies
replacement load cells for the MSI-4260 IS with the C-Cal value stamped on the serial number label. When a calibration is
performed with test weights, a new C-Cal is generated. C-Cal can be used when the electronics are replaced to get an
approximate calibration that may be suitable for non Legal for Trade applications.
The C-Cal number must be known prior to starting this procedure. For an MSI-4260 IS with its original load cell,
MSI prints this number on the calibration record, the serial number tag and on the calibration log found inside
the battery compartment.
C-Calibration reduces the accuracy of the system if the electronics are replaced or a new load cell is installed. Legal for Trade
installations require that the MSI-4260 IS is calibrated using test weights. If a system was originally multi-point calibrated, the
C-CAL calibration will erase the additional span points, as C-Cal is only a two point calibration (zero and span at 10% of
capacity).
Use the following steps to perform a C-Cal calibration.
1. Remove the hex seal screw from the MSI-4260 IS using the steps from
.
2. Press
to scroll to the C-Cal menu selection.
displays.
3. Press
to start the C-Cal procedure.
displays indicating that all weight should be removed from the hook.
4. Press
to set the zero calibration point. A flashing
displays.
• If the zero is in range,
displays briefly and then
displays.
5. Press
.
An MSI-4260 IS is ready for numeric entry of the C-Cal value.
6. Press
to enter the C-Cal value. The far left digit on the display flashes.
7. Press
to scroll the numbers. Press
to enter each digit.
Example: Enter 2500 kg on a 5000 kg capacity scale.
Press
two times for the leftmost blinking digit, press
to save that digit selection.
Press
five times for the next blinking digit, press
to save that digit selection.
Press
to save that digit selection.
Press
to save the next digit selection.
displays.
8. Press
to save the C-Cal value.
displays briefly followed by
’
.
9. Press
to exit
C-Cal Setup
menu.
10. Press
again to store the calibration and return to the scale operation.
displays.
IMPORTANT
USER
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ZERO
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