
To perform a digital calibration, first enter the calibration mode as explained on the
previous page. Next, make sure that the scale platform is empty and press the ZERO
button. The 4200 will respond by displaying "Ent 0" for approximately two seconds,
signifying that the zero calibration was successful. The display will then go to a zero weight
reading with the leftmost digit still flashing "C", indicating that the 4200 is now ready for
span calibration.
With the 4200 displaying 0 and still flashing "C" in the leftmost digit, place the known test
weight on the scale platform. The display will show the weight of the test load. Use the UP
and DOWN arrows to adjust the displayed weight to match the actual weight on the platter.
When the displayed weight is correct, press the UNITS button to save the calibration data
in the nonvolatile memory. Remember that after you adjust the weight reading, you must
press UNITS to save the calibration; failure to do so will result in improper calibration of
your 4200. When UNITS is pressed, the 4200 will display "Ent SP" for approximately two
seconds indicating that the span calibration was successful.
If an error message appears at any time during the calibration procedure ("Er..." on the
display), the calibration was not successful. Refer to Section 10 for causes and remedies.
EXITING THE CALIBRATION MODE
After successfully completing both a zero and span calibration, you may go back to the
"User Setup Menu" to review or change the programming of the 4200 by pressing the
GROSS/NET button. When calibration and setup are completed, return to normal weighing
by reversing the above procedure, and reassemble the indicator.
ZERO AND SPAN SWITCH SETTINGS FOR OLD REVISION BOARDS
The following tables show the switch settings for the older PCB035 revision 2.0 and 2.0A
boards and are provided for reference only. These settings should only be used if this
manual is being used to support older scales with the PCB035 main board. Scales
currently being sold all use the settings on the previous two pages.
Zero Offset switch settings - PCB035 Rev. 2.0 (no zero pot)
Approximate Zero Offset
S2-1
S2-2
S2-3
S2-4
S2-5
40% zero up
1
0
0
0
0
15% zero down
0
1
0
0
0
5% zero down
0
0
1
0
0
2% zero down
0
0
0
1
0
1% zero down
0
0
0
0
1
Section 7 Calibration
50