M E A S U R E M E N T S Y S T E M S I N T E R N A T I O N A L
MSI-4260
Port-A-Weigh
•
User Guide Page 23
CALIBRATION (CAL)
Function
Used to Calibrate the scale load cell. There are two types of calibration:
1) Initial Calibration and
2) Subsequent Calibration
INITIAL CALIBRATION
Function
Initial Calibration is used at the factory when Calibrating for the
fi
rst time, when the circuit
boards have been replaced or after the scale has gone through System Initialize.
Note:
Do not use this procedure for routine Calibration.
Action
1) Turn on the scale by pressing the
[POWER]
button.
2) Press Cal button once. "CAL" will appear, then press
[ENTER/TARE]
. The following steps
will occur:
3) Units selection: Display
fl
ashes “Unit” with the lb indicator. If calibrating in lb, press
[ENTER/TARE]
, or to select kg, press
[SELECT/F1]
, then
[ENTER/TARE]
. This step only effects
what the test weight unit is, it does not prevent lb/kg switching.
Note:
This step will not occur in scales setup by the Standards menu to measure in only one
unit.
4) Display shows “CAP” for 2 seconds then
fl
ashes “0”. Input the capacity using
[SELECT/F1]
and
[ENTER/TARE]
. After each digit is entered another digit is brought up by pushing F1.
For 100,000 lb capacity, since there are only have 5 digits, the correct procedure is to
enter the capacity as 99980, assuming a 20 lb ‘d’, or 99950 with a 50 lb ‘d’. 20 lb. is
the highest MSI recommended resolution for the 100k Load Cell. The scale will reach
a few ‘d’ over 100,000 lb using the X1000 annunciator, however it cannot be calibrated
at 100,000 lb since there are only 5 digits in the display. It is recommended that 100,000
lb systems be set to a “count by” not less than 20 lb, preferribly at a “count by” of 50 lb.
A 50 lb ‘d’ will settle faster and will display with more stability, though this depends on
the application. With a 20 lb ‘d’, the scale will display overload at about 100140 which
will display as 100.14 X1000. With a 50 lb ‘d’, the scale will display overload at 100400
which will display as 100.40 X1000. This assumes capacity was set at 99980 or 99950.
5) Display shows “d” for 2 seconds, then
fl
ashes the default Count By (division). Press
[ENTER/TARE]
to accept, or press
[SELECT/F1]
to pick another Count By, then press
[ENTER/
TARE]
.
