AWS QS-500 Manual de usuario

American Weigh Scales

QS-500 (500g x 0.1g)

User Manual

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.

• Alwaysweighonaatandlevelsurface,freefrom

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.

• Checkthebatteriesrstifyouarehavinganytrouble

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

AAA

I. Part List

1. Scale

2. Cover/Expansion Tray

3. AAA Batteries (x2)

II. Key Description

III. Battery Installation

1. Beforeusingthescaleforthersttime,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

AAA

QS-500

IV. Operation

1. Placethescaleonaat,levelsurfaceandpressthe

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. Youmaynowllthecontainerwiththequantityto

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: Displayedweightuctuatesrandomly

• 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. Specications

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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