American Weigh Scales, Inc.
MB-50
MB-300
User Manual
M atch b ox • S c a l e
D i g i t a l P o c k e t S c a l e
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Matchbox•Scale Manual
Thank you for purchasing the American Weigh
Matchbox Scale. Please read all operating instructions
carefully before use. This electronic scale is a
precision instrument. With normal care and proper
treatment, it will provide years of reliable service.
Never load the scale with more than the maximum
capacity. Overloading will permanently damage it!
Avoid any exposure to extreme heat or cold. Your
scale works better when operated at normal room
temperature. Always allow the scale to acclimate to
normal room temperature for at least one hour before
use.
Give your scale sufcient warm up time. Usually
30-60 seconds before calibration to give the internal
components a chance to stabilize.
Keep your scale in a clean environment. Dust, dirt,
moisture, vibration, air currents and a close distance to
other electronic equipment can all cause an adverse
effect on the reliability and accuracy of your scale.
Handle with care. Gently apply all items to be weighed
onto tray top. Although this scale is designed to be
quite durable, try to avoid rough treatment as this may
permanently damage the internal sensor.
Avoid shaking, dropping or otherwise shocking the
scale. This is a precision instrument and must be
handled with extreme care.
Only operate the scale on a stable, vibration free
surface.
I, OPERATION:
1. Place scale on a horizontal at surface, press the
[ON/OF] key to turn on the scale.
2. Wait until “0.0” or “0.00” is displayed.
3. Put the object(s) on the weighing platform.
4. Press and hold the “MODE” key for 3 seconds to
switch between weighing units.
II, TARE WEIGHING:
1. Turn on the scale as described above.
2. Place the “tare item” on the platform.
3. Press the [MODE] key, the LCD will display “0.0” or
“0.00”.
4. Add the “net-weight-item”.
III, CALIBRATION:
1. Press [ON/OFF] key to turn on the scale.
2. Wait until “0.0” or “0.00” is displayed, press and hold
[ON/OFF] key for 3 seconds and then you will see
“CAL” and the required calibration weight display on
the LCD.
3. Put the required calibration weight onto the platform.
4. If you see “F” on the LCD, this indicates that the
calibration has nished successfully.
5. If you see “E” on the LCD, this indicates that the
calibration has failed.
6. The scale will turn off automatically after calibration
is nished.
V. TROUBLESHOOTING
The primary reasons for inaccuracy or malfunction
are low batteries, incorrect calibration, overload or
operating on an unstable surface. Please keep this in
mind and maintain and operate your scale properly.
This scale is a precise instrument and must be
handled with the utmost care and caution.
[Display] Elimination of errors
Nothing, Battery-Symbol, [lo] or [88888]
Change the batteries.
[OUE2] Recalibrate the scale as shown above.
[EEEEE] You are overloading the scale. Remove the
excessive load immediately!
[LLLLL] The delicate weighing load cells have
[OLd] been damaged by misusing the scale
(i.e. it was shocked, dropped or
overloaded). You can try recalibrating the
scale. If the load cell has not been
damaged too much it will work
again after recalibration.
[UNST] Use the scale in a more stable position
Model
MB-50 MB-300
Capacity
50g / 1.764oz / 250ct / 771.5gn
300g / 10.585oz / 9.645ozt /
193dwt
Resolution
0.01g / 0.01dwt / 0.05ct / 0.1gn
0.1g / 0.005oz / 0.005ozt /
0.1dwt
Display
5 - Digit Backlit LCD
Calibration Weight
(not Included)
50g 300g
Platform Dimensions
(inches)
1.4 x 1.75
Scale Dimensions
(inches)
1.4 x 2.9 x 0.5
Power
1x CR2032 Battery (included)
Gross Weight
0.2 lb
Specications
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