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Process #1
1)
Adjust switch SW4 to the
CAL
position (DOWN) (see Process #2).
2)
With zero weight applied to the system (including sling), press SW1 (weight button) to adjust R3
(offset potentiometer) so that the display reads a +30 pound offset. Note: Display will periodically
flash
CAL
to let you know you are in
CAL
mode.
3)
Attach the sling to the load cell.
4)
Press SW2 (zero button) to zero the display.
5)
Place a calibrated (must be at least Class F NIST traceable) weight on to the sling and adjust
R10 to that weight. Remove weight, reset zero (switch SW2) and repeat. It is recommended that
you use at least 200 lb of calibrated weight to achieve an accurate calibration.
6)
When the reading of the display repeats the correct weight, remove all weight from the scale,
then return switch SW4 to the run position (UP).
7)
Press zero button (SW2).
8)
When the system indicates “0.0”, place a calibrated weight onto the sling and make sure that the
scale reads the correct value. Check scale at maximum weight. All readings must be within
0.1 % of NIST traceable standard.
Process #2
CAL MENU
Press the calibration button (see Fig. 35) to put
system in CAL mode.
The button on the right allows you to toggle
through the menus without saving any
parameters. The button on the left permits a
menu item to be selected or a parameter saved.
NOTE: Allow scale to stabilize at room
temperature for one hour prior to calibration.
Ensure that nothing is in contact with the scale
system during this procedure. Remove hands
from the system when noting the displayed
calibration results.
Fig. 35
“data”
Displays saved calibration and model information.
“sec”
Set Auto Power Down Timer between 15 and 300 seconds.
“grav”
Set Gravitational Acceleration in m/s2
“Full”
Applied calibrated mass at full scale.
“Half”
Used with three point calibration curve. Applied calibrated mass at a second point
between zero and full scale, usually at half.
CAUTION:
Calibration must
be performed
by a qualified
technician in
order not to
invalidate the
calibration
certificate.
R10
SW2
SW1
SW3
SW4
R3
Calibration
button
Left button
Right button
