MSI-4260 IS Port-A-Weigh
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5.0
Calibration
The MSI-4260 IS is calibrated using standard weights. It is required that the weight used is at least 10% of full capacity in order
to achieve rated accuracy. For example, use at least a 500 kg test weight to calibrate a 5000 kg capacity scale.
Although a single span point is usually adequate for rated accuracy, the MSI-4260 IS supports Multi-Point calibration with up to
four span points plus zero.
When adequate test weights are not available, the MSI-4260 IS can be calibrated using a calculated constant calibration which
is referred to as C-Cal. To use C-Cal, a previously generated C-Cal number must be known.
There are three kinds of calibration:
• Standard Calibration – Used for maintenance and routine calibration
• Initial Calibration – Used to set up both the capacity and resolution (d) of the scale; It differs from standard calibration
only in the initial steps; The initial calibration is performed after a calibration reset which completely erases the calibration
and setup memory
• C-Cal – If the last calculated C-Cal value is known, the
MSI-4260 IS can be calibrated without weights
5.1 Calibration Switch Access
Use the following steps to access the calibration switch on the MSI-4260 IS, if calibrating the unit using either the standard
calibration or the C-Cal calibration.
1. Remove the hex seal screw from the MSI-4260 IS.
Figure 5-1. Calibration Switch Seal Screw
2. Using a small screwdriver, press the Cal switch located behind the hex seal screw.
displays.
3. Reinstall the hex seal screw. The screw must be torqued to 45.6 inch-lb to ensure the integrity of environmental seal.
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POWER
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