User Guide

DS-220 User’s Guide

Battery Level Indicator

The battery level indicator shows the relative strength of the batteries. Full power is indicated by

four bars. As the batteries are depleted, the number of bars displayed decreases, until no bars

are left. At this point, it is necessary to replace the batteries (refer to the Battery Installation

section above). If the battery power drops to the point where the DS-220 can no longer function

accurately, the alarm will beep 20 times and the power will turn off automatically. When the

batteries are replaced, and the scale is turned back on, the DS-220 will resume operation with all

previous setting intact.

Calibration

The DS-220 is calibrated at the factory to provide high accuracy. While recalibration should

seldom, if ever, be necessary, recalibration is performed easily without sending the product to the

manufacturer for service. A known calibration weight (in kilograms) is required to recalibrate the

scale, and can be any value between 5 kg and 100 kg. 25 kg is recommend. Best accuracy is

obtained by using the largest weight available (i.e. a 50 kg calibration weight will provide 10x

better calibration accuracy than a 5 kg calibration weight). In addition, it is necessary to know the

weight to within 2 grams.

To recalibrate the DS-220, perform the following steps:

1. Place the DS-220 weighing platform on a firm, level surface.

2. Turn the power to the DS-220 off.

3. Remove all objects from the platform.

4. While holding , press and release . The DS-220 will turn on, and after a few seconds

the display will show SET CAL and 25.000 kg.

5. Using or adjust the displayed value (in 1g increments) so that it is equal to the

weight of the reference calibration weight. Use the key to adjust in 1 kg increments.

6. Press . A number representing the unloaded platform will appear on the display. Press

to lock in this value. The display will read zero.

7. Apply the calibration weight to the platform. A number representing the applied reference will

appear on the display. Allow at least 10 seconds for this number to stabilize.

8. Press . The DS-220 is now recalibrated to the reference weight.

9. Refer to the Quick Start section above for setting the desired Mode, Units, and Resolution.