Calibration
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5.5 C-Cal Calibration
When adequate test weights are not available, the MSI-4260M 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. 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 L-F-T applications.
C-Calibration reduces slightly the absolute accuracy of the system if the electronics are replaced or a new load cell is installed
and is intended for non-critical use only. Legal-for-Trade installations require that the MSI-4260M is calibrated using test
weights. If a system was originally multi-point calibrated, the C-CAL calibration erases 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-4260M using the steps from
.
2. Press
to scroll to the C-Cal menu selection and then
displays.
3. Press
to start the C-Cal procedure.
displays, indicating all weight should be removed from the
hook.
4. Press
to set the zero calibration point. A flashing
displays.
5. If the zero is in range, the scale briefly displays
.
displays.
6. Press
and the MSI-4260M is ready for numeric entry of the C-Cal value.
7. Press
to enter the C-Cal value. The far left digit flashes, indicating that number should be entered.
8. Press
to scroll the numbers and
to enter each digit.
Example: Enter 2500 lb on a 5000 lb capacity scale.
Press
two times for the leftmost blinking digit, press
to save that digit selection.
Press
six times for the next blinking digit, press
to save that digit selection.
Press
for the next blinking digit.
Press
to save that digit selection.
Press
for the next blinking digit.
Press
to save that digit selection.
displays.
9. Press
to save the C-Cal value. The display reads
followed by
.
10. Press
to exit C-Cal menu and press
again to store the calibration and return to weigh mode
and the (
briefly displays) or press
to cancel the calibration and return to the weigh mode (
briefly displays).
