
F.
Press and hold the PRINT button to display the internal counts - this is the RAWHI
value. Use the following formula to calculate the SPAN and full capacity output
(RAWFC). Note: when the Print button is pressed, the SPAN value will be
transmitted to printer port.
SPAN
= (
RAWHI
−
RAWLO
) ∗
CAPACITY
TESTWEIGHT
RAWFC
=
RAWLO
+
SPAN
(CAPACITY is the capacity of the indicator, TESTWEIGHT is the test weight used)
Note: if a test weight equal to the capacity of the scale is used, then RAWFC is the
same as RAWHI, and SPAN = RAWHI - RAWLO.
RAWFC must be less than 100,000 counts, and SPAN should be at least 40,000
counts.
Typical analog calibration values:
RAWLO:
3,000 to 5,000 counts
RAWHI:
58,000 to 67,000 counts
SPAN:
53,000 to 64,000 counts
If the zero and/or full scale readings are not within these limits, refer to Section 6 for
instructions on how to set the analog calibration.
G.
Proceed to DIGITAL CALIBRATION.
DIGITAL CALIBRATION
The Model 4200 must be calibrated with a test weight equal to at least 20% of the scale
capacity (5% for capacities over 1000 lb). The greater the test weight, the better the
calibration will be throughout the entire active range of the platform or load cell assembly
(calibrating at capacity is ideal). Follow these steps to perform the digital calibration:
A.
If not already in the setup mode, do so now using the procedure outlined above.
B.
If not in the calibration mode, press GROSS/NET to enter the calibration mode.
C.
Remove all weight from the scale platform.
D.
Press the ZERO button - the display will show "Ent 0" to signify that the zero
point has been successfully calibrated.
Section 2 Quick Setup Guide
6