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
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MSI-4300 Porta-Weigh Plus/5 Key
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User Guide
within acceptable limits the message reads “WEIGHT” indicating it is
time to add the test weight(s).
4) Pick up a test weight of at least 20% of capacity. (Note: A test weight of
50% or more of capacity is recommended for highest accuracy.)
5) Use the SELECT (NET/GROSS) key to cause the displayed reading to
match the value of the test weight. When a match is made push ENTER
(TEST). Repeat for the remaining digits. When the last digit is entered
the scale should be steady, as this can affect calibration accuracy.
6) Calibration is complete, push CLEAR (ZERO) to return to normal scale
operation, or push SELECT (NET/GROSS) to choose another Calibrate
Setup function.
FINE CALIBRATION
Fine calibration is for minor adjustments to the calibration and is usually not
necessary.
1) Enable Calibration by pushing the key behind the seal port.
2) Use the SELECT (NET/GROSS) key to scroll to the “FINE CAL”
message. Push ENTER (TEST).
3) Pick up a test weight of at least 50% of capacity. The weight is indicated
on the numeric digits.
WARNING
: This function will not work unless the scale is loaded at 45% of
capacity or more.
4) Use the SELECT (NET/GROSS) key to cause the displayed reading to
move up slightly. Use the TARE key to cause the reading to move
down. When the displayed reading is acceptable push ENTER (TEST).
5) Fine Calibration is complete. You are now back in the Calibration Setup
Menu. Push CLEAR (ZERO) to return to normal scale operation, or push
SELECT (NET/GROSS) / ENTER (TEST) to choose another Calibrate
Setup function.
CAL WITH RCAL VALUE (CALIBRATE WITH THE RESISTOR CALIBRATION
NUMBER)
Cal Rcal is for emergency calibration when test weights or a calibration system
is not available.
1) Remove the right battery tube (facing the back). On the calibration label
is a printed RCAL value. Make a note of the value and reinsert the
battery tube. Turn the scale power on and push the Calibrate enable
switch behind the seal port.
2) Use the SELECT (NET/GROSS) key to scroll to the “CAL RCAL”
