5
CALIBRATION
The AS-400D series scale was calibrated at the factory during final inspection and should not
require adjustment. In the event the scale should need re-calibration, the following calibration
procedure should be performed. To maintain the scale’s high degree of accuracy, it is
recommended that a qualified technician with certified test weights re-calibrate the scale.
Before beginning calibration, the following equipment is required:
•
Calibrated test weights (50 lbs)
•
No. 1 Phillips and 3/16 or 1/4 slotted screwdriver
To Calibrate The Scale:
1. Unplug the scale from the power outlet.
2. Remove the stainless steel platform.
3. Once the platform has been removed, locate the calibration jumper J12 on the main
circuit board.
NOTE!
On the AS-400D, locate the calibration seal (plastic cover) and
remove the cover by removing the two (2) small slotted screws on the bottom of the
scale. This will expose the calibration jumper J12.
4. Remove the jumper by pulling upwards.
5. Replace the scale platform onto the scale.
6. Plug in the power cord.
7. After the power-up sequence, the display should appear blank.
8. Press and hold the
ZERO
switch on the front of the scale base until
/2$G
is displayed.
9. Place a 50-pound weight onto the platform and press the
ZERO
switch.
10. Wait until
8Q/2$G
appears on the display, then remove the weight.
11. Press the
ZERO
switch and wait until the display shows
G2Q(
.
12. Unplug the scale from the power outlet, and then remove the scale platform.
13. Replace the jumper onto J12.
14. Replace the scale platform, and then plug in the power cord. This will reset and restart
the scale for normal operation.
NOTE! If changing from Pounds to Pounds/Ounces mode or from
Pounds/Ounces to Pounds mode, the scale must be recalibrated.
Zeroing The Scale
To force the scale to a zero (
) weight reading at any time, press the
ZERO
switch. If the
zero (
) could not be executed, check for one of the following reasons:
•
There was motion present on the scale at the time.
•
The scale was in an over-capacity condition
CARE AND MAINTENANCE
•
DO NOT subject the scale platform to sudden shocks or impact.
•
DO NOT expose to direct sunlight or temperature extremes or any rapidly moving air
source.
•
DO NOT use acetone or other volatile solvents for cleaning the scale.
•
DO NOT submerge the scale in water, pour or spray water directly on it.
•
DO clean the scale with a soft cloth dampened with a mild detergent.
•
DO provide good, safe ground and clean AC power.
•
DO keep the area around the scale clear to provide adequate air circulation.
