AWS QS-500 Manual de usuario
American Weigh Scales
QS-500 (500g x 0.1g)
User Manual
QS-500
Copyright © 2010 American Weigh Scales, Inc.
All rights reserved. Rev. 2.0
QS-500
Thank you for purchasing the QS-500 digital pocket
scale. Please read all operating instructions carefully before
use. Scales are precision measuring devices and should
always be handled with proper care. To ensure years of
reliable service, keep these simple tips in mind:
• Do not exceed the scale’s maximum capacity.
Overloading your scale can permanently damage it!
• Avoid exposure to extreme heat or cold. Scales
perform best at normal room temperature. If
temperatures have changed dramatically, calibration
and adjustment may be necessary.
• Allow your scale to warm up for 30-60 seconds before
performing calibration and adjustment(if available).
• Store your scale in a clean, dry location. Dust, dirt,
and moisture can accumulate on the weighing
sensors and electronics causing inaccuracy or
malfunction.
• Avoid using your scale in close proximity to strong
radio wave emitting devices such as computers, cash
registers, and cordless phones.
• Alwaysweighonaatandlevelsurface,freefrom
vibrations and drafts. The corner of a room is usually
the most stable.
• Gently apply all items to be weighed. Do not drop
items onto the weighing platform.
• Avoid dropping your scale. The warranty does not
cover damage due to rough treatment or overload.
• Checkthebatteriesrstifyouarehavinganytrouble
with your scale. This simple step can remedy most
scale issues.
• Do not disassemble your scale. This product contains
no user serviceable parts.
MODE
ON/OFF
TARE
g
AAA
AAA
I. Part List
1. Scale
2. Cover/Expansion Tray
3. AAA Batteries (x2)
II. Key Description
III. Battery Installation
1. Beforeusingthescaleforthersttime,check
the battery compartment and remove any plastic
insulation strips or packaging that may be in place to
prevent battery drainage during shipping/storage.
2. If you are replacing the batteries, make sure the
positive and negative contacts are properly aligned.
MODE Key
ON/OFF/
TARE Key
MODE
ON/OFF
TARE
g
AAA
AAA
QS-500
IV. Operation
1. Placethescaleonaat,levelsurfaceandpressthe
ON/OFF/TARE key to turn the scale on.
2. Once the start-up process completes and the scale
goes to zero you are ready to weigh.
3. Place the quantity to be weighed onto the weighing
platform.
4. Wait a couple seconds for the display to stabilize
before taking a weight reading.
V. Changing the Unit of Measure
1. Press the MODE key to change the scales displayed
unit of measure.
2. If the scale is turned off then back on, it will default
to the last unit used.
• QS-500 Units: g (gram) oz (ounce) ozt (troy
ounce) dwt (pennyweight)
VI. Using the Tare Feature
You can use this scale’s tare feature to subtract the weight
of an empty container or vessel for net weight determination.
NOTE: The weight of the container will subtract from the
available capacity.
1. Place the empty container or vessel on the weighing
platform.
2. Press the ON/OFF/TARE key once. The display will
then reset to zero. If the container is removed, it’s
weight will be displayed as a negative number.
3. Youmaynowllthecontainerwiththequantityto
be weighed. The display will show the net weight of
the contents.
4. To return to normal weight display (gross weight),
remove any items from the weighing platform and
press the ON/OFF/TARE key again to re-zero the
scale.
VII. Calibration
Calibration and adjustment are performed at the factory.
However, the weighing range can shift slightly during
shipping. Also, due to changes in local acceleration of gravity
around the world, adjustment is recommended when moving
the scale from one location to another. To check calibration:
1. Place the required calibration weight on the scale
and note the displayed value.
2. If the displayed value is not within acceptable
tolerance (see chart below), adjustment is required.
Model Acceptable
Tolerance (±)
Calibration
Weight
Recommended
Accuracy Class
QS-500 0.2g 500g OIML M2
VIII. Adjustment
1. With the scale OFF, press and hold the MODE key
then press the ON/OFF/TARE key until the display
shows a random number. Now release both keys.
2. Press the ON/OFF/TARE key again. The display will
show “Zero” then “500.0g”.
3. Gently place a 500g weight on the center of the
platform and press the ON/OFF/TARE key again.
The LCD will display “PASS” then “500.0”.
4. Calibration is complete. If the scale shows “ H ”, an
error has occurred - Turn off the scale and repeat
steps 1 to 3 above.
QS-500
IX. Troubleshooting
• Problem: Scale will not turn on
• Solution: Check the batteries
• Problem: Displayedweightuctuatesrandomly
• Solution: Make sure your workspace is stable and
free of any air currents or vibration
• Problem: Displayed weight is inaccurate
• Solution: Perform a calibration adjustment
X. Error Codes
1. OUTZ - Zero range has shifted. Perform calibration
adjustment. If the problem persists, the load cell may
be permanently damaged due to overloading.
2. 88888 - Maximum capacity exceeded. Remove the
extra weight to avoid damaging the load cell.
3. L - Batteries are low. Replace the batteries.
XI. Specications
QS-500
Max. Capacity 500g
Readability 0.1g
Power Two (2) AAA Batteries
Dimensions 0.7 x 3.3 x 4.3 in.
Platform Dimensions 2.1 x 2.1 in.
Warranty 10 Year Limited Warranty
XII. Capacity/Readability Charts
QS-500
500g x 0.1g
17.64oz x 0.01oz
16.08ozt x 0.01ozt
321.5dwt x 0.1dwt
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