Rice Lake MSI-4260 Port-A-Weigh - Manual (Page 35)

Calibration 31
5.0 Calibration
The MSI-4260 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 500kg test weight to calibrate a 5000kg capacity scale. Although a single span
point is usually adequate for rated accuracy, the MSI-4260 supports Multi-Point
calibration with up to 4 span points + Zero.
When adequate test weights are not available, the MSI-4260 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. MSI supplies replacement load
cells for the MSI-4260 with the C-Cal value stamped on the serial number label.
There are three aspects of calibration:
• Standard Calibration – is used for maintenance and routine calibration.
• Initial Calibration – is used to setup both the capacity and resolution (d) of the
scale. It differs from Standard Calibration only in the initial steps. Initial
Calibration is performed after a Calibration Reset which completely erases the
calibration and setup memory.
• C-Cal – If the last calculated C-Cal values is known, the scale can be calibrated
without weights.
XQ/G

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 Blinks
Capacity
1) Remove the seal screw. With
a small screwdriver press the
Cal Switch behind the seal
screw.
The CAL Setup Menu
appears.
2) Press TARE (functioning as
ENTER) to Start the
Calibration Procedure.
3) The display reads “UnLd”
(unload) indicating you
should remove all weight
from the hook.
4) Ensure the 4260 is
motionless, then press
TARE . The 4260 sets the
zero calibration point. Wait
while the display is blinking.
5) If the zero is in range, the
scale will display “PASS”.
Then “LoAd1” is displayed.
6) Load the scale with a
precision test weight. For single
span point calibrations a test weight
of 20% of capacity or more is
recommended.
7) Press TARE . The 4260
flashes the capacity. If you
are loading the scale with
the capacity weight, skip to
step 10.
&$/
Standard Calibration
Procedure
3$66
No weight
on hook
Flashes
Zero
Lift Test
Weight
example capacity
blinking
Remove
Hex Seal
Screw
Cal Switch
Access
Press Switch
behind the hole
with a small
Screwdriver
TARE
T
TARE
T
TARE
T
Figure 5-1. Standard Calibration Procedure