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AHS SERIES
ELECTRONIC HANGING SCALE
NTEP APPROVED
OPERATION MANUAL
PLEASE READ THIS MANUAL CAREFULLY BEFORE
ATTEMPTING TO OPERATE THE SCALE
Nov 2018 REV 1
Specifications subject to change without prior notice
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CONTENTS
1. OPERATING PRECAUTIONS
2. KEYBOARD LAYOUT AND DESCRIPTION
3. INSTRUCTIONS FOR USE
4. INTERNAL FUNCTIONS AND INITIAL SETUP
5. AUTO CALIBRATION PROCEDURES
6. TROUBLESHOOTING
7. DAILY CARE AND MAINTENANCE
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1. OPERATING PRECAUTIONS
1.1 THIS IS NOT A TOY, PLEASE KEEP OUT OF REACH OF
CHILDREN.
1.2 THIS IS A PRECISION WEIGHING INSTRUMENT, HANDLE
WITH CARE, PROTECT FROM SHOCK.
1.3 REMOVE ALL LOADS FROM THE HOOK WHEN THE SCALE
IS NOT IN USE.
1.4 KEEP AWAY FROM DIRECT SUNLIGHT, MOISTURE, HEAT
AND VIBRATION.
1.5 REMOVE ALL BATTERIES FROM BATTERY PACK BEFORE
LONG TERM STORAGE.
1.6 AVOID USING THIS SCALE IN AN ENVIRONMENT WHERE
STRONG WIND MAY CAUSE CONTENTS OF THE SCALE
CONTAINER TO FALL OUT.
1.7 DANGER! DO NOT OVERLOAD THIS SCALE.
1.8 BE CAREFUL WHEN ADDING ITEMS OR GOODS TO THE
SCALE.
1.9 PLEASE HANDLE AND OPERATE THE HOOK WITH UTMOST
CARE.
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2. KEYBOARD LAYOUT AND DESCRIPTION
(Standard version)
1. ON/ZERO KEY
Press this key to turn the scale on, reset the weight to zero, or to tare
off a container weight
2. MODE KEY
Press this key to switch between metric only or lb, oz weighing unit
and with or without backlight.
NOTE:
To comply with the law of certain countries, the avoirdupois weight
units may be disabled. Function only able for selecting the backlight (if
installed) status
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3. HOLD KEY
Press this key to hold the displayed weight
4. OFF KEY
Press this key to turn scale off
5. ZERO INDICATOR
This indicator appears to indicate a zero weight status
6. METRIC UNIT INDICATOR
This indicator appears to indicate the weighing unit currently engaged
is in metric unit (kg or g)
7. POUND UNIT INDICATOR
This indicator appears to indicate the weight unit currently engaged is
in imperial system.(Pound)
8. OUNCE UNIT INDICATOR
This indicator appears to indicate the weight unit currently engaged is
in ounce only unit.
9. BATTERY LEVEL INDICATOR
Battery level indicator appears when the scale is operated on battery
power and the number of bars indicates battery level.
10. HOLD INDICATOR
This indicator appears to indicate the hold function is engaged, holding
the weight reading unchanged.
11. PEAK HOLD INDICATOR
This indicator appears to indicate the peak hold function is engaged,
showing maximum weight reading from the time the scale was
powered, or since the peak hold function was reset.
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(USA version)
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3. INSTRUCTIONS FOR USE
3.1 POWER FOR THE SCALE
The HS hanging scale can be powered either by 4 x C batteries (not
supplied) or a power adaptor with output of 9V DC 100mA (optional
accessories).
3.2 FIXING THE SCALE
The scale must be suspended from a suitable structure, e.g. a wire
rope, from a firm support that will withstand at least 5 times of the scale
rated capacity for maximum operating safety.
3.3 PLACING CONTAINER OR PAN SUPPORT (OPTIONAL
ACCESSORIES)
Before turning the scale on, place the container or pan support to the
hook first.
3.4 APPLYING A LOAD
Always place the load on the scale gently; sudden shock or excessive
force may cause damage to the weight sensor inside.
It is a good practice to remove all loads from the hook immediately
after weighing. This will help to prolong the lifespan of the weight
sensor.
3.5 HOW TO SWITCH BETWEEN METRIC AND LB WEIGHT UNIT
AND BACKLIGHT STATUS
Turn scale on, press MODE to switch between metric (kg or g) and
avoirdupois (lb, lb/oz) unit, with or without backlight (optional
accessories).
When backlight function is employed, backlight will automatically go
off 2 seconds after zero weight is detected and will automatically return
when a load is applied again.
NOTE: To comply with the law of certain countries, the avoirdupois
weight units may be disabled.
3.6 HOLDING THE WEIGHT DISPLAYED
To hold the weight displayed, press HOLD after displayed weight is
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stable. To disable the holding function, press HOLD again.
3.7 CHANGING BATTERIES
When the low battery sign appears, unload the scale and turn it off.
Replace the batteries and place the new batteries according to polarity
marked inside the chamber.
3.8 TARE OFF A CONTAINER WEIGHT
If a container or a pan support is placed to the hook after scale is
switched on, press ON/ZERO to tare off the weight and display will
return to zero again. However, the rated capacity of the scale must not
be exceeded.
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4. INTERNAL FUNCTIONS AND INITIAL SETUP
SETTING PROCEDURES AND KEY FUNCTIONS
● Press and hold the MODE key and press the ON/ZERO key.
Release the MODE key, then the display shows F1.
● Use MODE key to scroll through the internal setting menu and
the HOLD key to enter the setting.
● Use HOLD key in the sub-setting to scroll through available
options. Press MODE key to confirm.
● Press ON/ZERO key in the Function menu to save changes.
Changes are saved after a beep sound is produced.
FUNCTION MENU OF INTERNAL SETTINGS
FUNCTION
FUNCTION DESCRIPTION
F0
Initial Zero range
F1
For Qualified Technical Personnel Only
F2
LCD segment check and software version information
F3
For Qualified Technical Personnel Only
F4
Auto Power Off Function
F5
RS-232 Baud Rate
F6
Digital Motion Filter
F7
Serial Output Mode
F9
Auto Tare Function
F12
HOLD Function
Initial Zero Range (F0)
Under this function, user can set initial zero range. The scale is
equipped with 5 selections:
Zero0 -> Zero1 -> Zero2 -> Zero3 -> Zero4
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Display Segment Check (F2)
Under this function, display will first show software version, then all
LCD segments including backlight (if equipped) will be lit up. Contact
your dealer if any display element is missing.
Auto Power Off (F4)
Enable/disable auto power off function after 10,30, or 60 minutes of
inactivity.
0_off -> 10_off -> 30_off
Baud Rate (F5)
The scale is equipped with 3 RS232C output baud rate:
Br 4800 -> Br 9600 -> Br 19200
Digital Motion Filter (F6)
Under this function, user can enable digital motion filtering function if
the weighing environment is unstable. The scale is equipped with 3
filter speeds:
Filt 0 -> Filt 1 -> Filt 2
Serial Output Mode (F7)
Under this function, user can select between different serial
transmission modes.
OFF -> Conti -> AUTO
OFF
Transmission off
Conti
Continuous transmission
AUTO
Transmission when weight is stable
Auto Tare (F9)
The scale is equipped with auto tare function which tares off the initial
weight automatically when this function is engaged. The tare weight
is automatically cleared when everything is removed from the
weighing plate.
tr_on -> tr_of
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HOLD Function(F12)
Under this function, user can enable HOLD function. The scale is
equipped with 3 hold functions:
nor (Normal) -> AUto (Auto) -> PEAY (Peak)
Normal hold
Manually press HOLD key to enable/disable
hold function.
Auto hold
Automatically hold the display weight upon
stable weight. Press HOLD key again to
disable it.
Peak hold
Maximum weight reading from the time the
scale was powered, or since the peak hold
function was reset. Press HOLD key to reset
peak reading to zero.
5. AUTO CALIBRATION PROCEDURES
1. Turn scale off.
2. Press and hold HOLD, then turn scale on.
3. Scale displays CAL.0
4. Scale will self calibrate zero point before proceeding to the first
point calibration.
5. After zero point calibration is done, scale displays LOAD
XX.XXX
(The standard weight displayed is in lb unit)
6. Load calibration load as request.
7. Wait until scale displays LOAD XX.XXX(second point).
8. Load calibration load as request or press ON/ZERO to abandon
second point calibration, wait until scale displays DONE.
9. Calibration completed and scale is ready for operation.
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6. TROUBLESHOOTING
SYMPTOM: SCALE DOES NOT TURN ON
CHECK: ARE BATTERIES INSERTED CORRECTLY?
ARE BATTERIES FUNCTIONING PROPERLY?
CHECK THE OUTPUT VOLTAGE IS DC 9V/100MA
IS THE MAIN ADAPTOR PLUGGED PROPERLY
INTO THE SCALE POWER INLET?
ACTION: RELOAD BATTERIES OR INSERT MAIN ADAPTER
TO BOTH SCALE AND POWER OUTLET AGAIN.
SYMPTOM: SCALE TURNS ON BUT ZERO WEIGHT DOES
NOT APPEAR
CHECK: IS THERE ANY LOAD APPLIED TO THE HOOK?
IS THE HOOK STABLE?
WEIGHT OF THE CONTAINER IS TOO HEAVY?
ACTION: TURN SCALE OFF, REMOVE THE CONTAINER
AND TURN SCALE ON AGAIN.
SYMPTOM: RATED CAPACITY CANNOT BE REACHED
CHECK: IS THE WEIGHT OF THE CONTAINER TARED OFF
BY "ZERO" KEY?
ACTION: TURN SCALE OFF, REMOVE THE CONTAINER
AND TURN SCALE ON AGAIN.
SYMPTOM: SCALE DOES NOT WEIGH CORRECTLY
CHECK: THE RIGHT WEIGHT UNIT IS “EMPLOYED" AND
THAT THE SCALE IS CALIBRATED CORRECTLY?
ACTION: CONTACT YOUR DEALER.
SYMPTOM: SCALE TURNS OFF AUTOMATICALLY
CHECK: IS THE AUTO OFF FUNCTION EMPLOYED?
ACTION: DISABLE THE AUTO OFF FUNCTION.
SYMPTOM: WEIGHT DISPLAY REMAINS UNCHANGED
CHECK: IS THE HOLD FUNCTION EMPLOYED?
ACTION: PRESS HOLD AGAIN.
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7. DAILY CARE AND MAINTENANCE
7.1 CLEAN THE SCALE WITH A SOFT, DAMP CLOTH, IF
NECESSARY WITH A MILD DETERGENT.
7.2 DO NOT USE ANY HARSH, ABRASIVE MATERIAL,
ACETONE, VOLATILE SOLVENT, THINNER OR ALCOHOL
FOR CLEANING.
7.3 VERIFY THE ACCURACY OF THE SCALE PERIODICALLY.
RECALIBRATION OF THE SCALE MAY BE NECESSARY.
7.4 IN SOME COUNTRIES, THE CALIBRATION IS ONLY
ALLOWED TO BE COMPLETED BY A QUALIFIED/
AUTHORIZED AGENT. CONTACT YOUR DEALER FOR
MORE INFORMATION.
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