User Calibration
In case of severe overload the scale may lose its accuracy. Re-
calibration of the scale may be needed. The load cell of this precision
scale is normally protected against overloaded weight applied slowly, but
extreme overload caused by dropping the scale or dropping something
heavy on the scale may require re-calibration.
CAUTION
: Please do not attempt any calibration by yourself unless you
have a 5lb weight available.
Make sure the scale is connected to the PC via USB cable or to AC
mains. Press the ON/TARE key and hold it for about 5 seconds. When
the display changes to
, release the ON/TARE key. Now the
scale is in user calibration mode (the LCD also displays 5lb on the left
corner). Put 5lb weight on the platform. After the weight is stable, scale
will calibrate itself. Once the calibration is completed, scale will enter the
normal weighing mode.
USB30
USB Electronic Postal Scale
Max. 30lb d=0.1oz
3 way power: USB, AC Adapter or Battery
With fold-up platform for weighing large flats or mailing tubes
Connects with PC to output weight
Switchable to 15kg/1g scale
The USB70 is a high quality precision electronic digital scale with
weighing function and USB connection to a computer to output weight in
applications. Please read this manual on how to use this product.
SPECIFICATIONS
Range
:
0 ~ 30lb (0 ~ 15kg)
Mechanical overload protection
Tare
:
Unlimited to the total capacity of the scale
Accuracy
:
± 0.1 % of reading ± 1 digit
Factory Calibration :
4 points through the capacity range
User Calibration
:
5lb/2000g
Resolution
:
0.1oz (1g)
Minimum Weight
:
0.1oz (1g)
Min. Add-on Wt.
:
0.1oz (1g)
Power
:
AC Adapter: 9V, 100mA (Optional) or
USB: Self powered or
Battery: 9V alkaline battery (Not supplied)
Warm-up time
:
1 minute or less
Display
:
7-segment 6 digit LCD
Auto Off
:
Auto off after 5 minutes of non-use in battery
operation
Temperature
:
Good performance within 50 to 105 degrees F
Case & Platform
:
ABS plastic
Fold up Platform :
For convenient weighing of round and flat objects
Load Cell Technology :
Four optimal placed single precision strain gauges
with temperature compensation
Load Cell Body
:
High Tensile Strength Aluminum Alloy
