Neptune 5500
14
CHAPTER 5: CALIBRATION
5.1
CALIBRATION OVERVIEW
The indicator is calibrated by following the procedures embedded in F16 (Zero) and F17
(Span) of the Setup Menu. Each procedure enters a value into the indicator's non-volatile
memory - F16 the zero value (deadweight) and F17 the span value (test weight). The
minimum test weight that can be used is 1% of full-scale capacity. After the two calibration
procedures are executed successfully, you should record both calibration values in Table
6-1 using the F18 View procedure.
In the unlikely event that either value is lost while in the field, the setup menu makes
provisions for re-entering these values via F19 and F20, thus eliminating the need for re-
calibration with test weights.
NOTE:
This chapter assumes that the indicator is in Setup (“F”) Menu mode. If the indicator
is not in Setup Menu mode, refer to Chapter 6 for instructions.
5.2
ZERO CALIBRATION (F16)
1. While in the Setup mode, using the right or left arrow keys, scroll to "
F 16
", then scroll
down once using the down arrow
key to enter zero calibration menu. The display will
momentarily show "
C 0
" followed by a value. This value is the internal A/D count and
can prove useful when trying to troubleshoot setup problems. Record this value where
you can find it again.
2. After making sure that there are no test weights on the platform, press the ZERO key to
zero out the displayed value.
3. Press the SET key to save the zero point value. The display will show
“SAVE”
then
“
EndC0
" momentarily, then revert back up to F16. At this time, proceed to the F17
span calibration to complete indicator calibration.
5.3
SPAN CALIBRATION (F17)
1.
While in the Setup mode, using the right or left arrow keys, scroll to "
F 17
", then scroll
down once using the down arrow key to enter span calibration menu.
2. The display will momentarily show "
C 1
" for the span calibration, followed by a value
with one flashing digit. This value will be zero with the Decimal Point parameter
selected in F10. Place the test weight on the scale platform.
3. Use the four directional keys to adjust the displayed value to the actual test weight
value. Increase the flashing digit by pressing the up arrow
key. Decrease the flashing
digit by pressing the down arrow
key. Pressing the left arrow
key or the right arrow
key
will change the position of the flashing digit.
4. Place the test weight on the scale and press the
SET
key.
5. If the calibration was successful, the display will show SAVE, then "
EndC1
"
momentarily. You can now end the calibration process or proceed through a three point
calibration.
For three point calibration - the scale will momentarily show "
C 2
". See steps 3, 4 and
5. The scale displays
C 3.
See steps 3, 4 and 5.
To end as a single point calibration, press the SET key at C 2 and again at C 3. The
scale returns to F17.
