APM - NTEP
ELECTRONIC WEIGHING SCALE
OPERATION MANUAL
PLEASE READ THIS MANUAL VERY CAREFULLY BEFORE
ATTEMPTING TO OPERATE THIS SCALE
DECEMBER 2003 REV 2
Specifications subject to change without prior notice
CONTENTS
1. INSTALLATION
2. SPECIFICATIONS
3. KEYBOARD LAYOUT AND DESCRIPTION
4. INITIAL SETUP
5. INSTRUCTION FOR USE
6. TROUBLE SHOOTING
7. DAILY CARE AND MAINTENANCE
APPENDIX: ERROR CODES
1. INSTALLATION
Because of metrological legislation, access to some
metrological parameter settings is restricted to
authorized personnel. Do not attempt to change any of
the built-in parameters. Contact your scale dealer for
installation and technical assistance.
CAUTION:
This unit is legal for trade only when it is sealed (and/or
stamped) and bearing a serial number. Do not attempt
to break the seal (or stamp) affixed to this scale or
remove the serial number. Contact your dealer for more
information and after sales service.
For most accurate weighing results, do not use the scale
where or when the environmental conditions fall outside
those listed in SPECIFICATIONS.
Do not attempt to open this unit or conduct any trouble
shooting other than that listed in TROUBLE SHOOTING.
2. SPECIFICATIONS
Model No. Capacity (Max) Division (e)
APM-6 (Non-NTEP) 6kg/15lb 0.002kg/0.005lb
APM-15 (NTEP) 15kg/30lb 0.005kg/0.01lb
APM-30 (NTEP) 30kg/60lb 0.01kg/0.02lb
APM-60 (NTEP) 60kg/150lb 0.02kg/0.05lb
APM-150 (NTEP) 150kg/300lb 0.05kg/0.1lb
Tare Range 1/3 Max. ¡ e
Power-on Zero Range ¡Ó10% Max.
Zero Range ¡Ó2% Max.
Min. Load 20e
Max. measuring range
9.0mV
Min. signal voltage per
verification scale
interval
1.5 V
Power source
BY EXTERNAL POWER ADAPTOR OR
RECHARGEABLE BATTERY
Minimum battery
voltage
5.5 VDC
Load cell Excitation
voltage
5 VDC
Minimal load cell
impedance
85
Maximal load cell
impedance
1000
Load cell connection
4-wire
Operation
Environment
-10o~40oC (14o~104oF)
Non-condensed. R.H.¡85%
Specifications subject to change without notice.
NOTE:
NTEP = Approved, legal for trade
Non-NTEP = Not approved, not legal for trade
3. KEYBOARD LAYOUT AND DESCRIPTION
1. ON/OFF KEY
Press this key to turn indicator on or off.
2. MODE KEY
Press this key to shift among different weight units
and/or turn backlight on/off. (If supplied)
3. TARE KEY
Press this key to tare off the weight of a container.
4. ZERO KEY
Press this key to set weight displayed to zero.
5. M+ KEY
Press this key to accumulate current weight to memory.
6. MR KEY
Press this key to recall the total accumulated weight
from memory.
7. MC KEY
Press MR and ZERO simultaneously to clear weight from
memory.
8. LO BAT INDICATOR
This indicator appears when input voltage is below the
lowest input limit. Check the power supplied to the
indicator.
9. ZERO INDICATOR
This indicator appears to indicate zero weight status.
10. NET INDICATOR
This indicator appears to indicate the tare function
is in operation and weight shown is net weight.
11. M+ INDICATOR
This indicator appears to indicate memory contents of
stored data.
12. MR INDICATOR
This indicator appears to indicate the value shown is
the total accumulated weight stored.
13. WEIGHT UNIT INDICATOR
The weight unit that is currently in use is shown here.
4. INITIAL SETUP
4.1 PLACING THE SCALE
In order to obtain an accurate weighing result, the
complete weighing instrument (hereinafter referred as
the scale) must be placed on a firm, stable and level
surface.
If required, adjust the adjustable feet, underneath the
scale, to level the scale. Refer to the spirit level
for assistance with leveling.
4.2 INTERNAL SETTING
4.2.1 Display Segment Check
User can enter this function to check to see if the display
and backlight (if purchased) are functioning properly.
a. Scale is off
b. Press and hold TARE, then press ON/OFF
c. Scale displays F.1
d. Press TARE once
e. Scale displays F.2
f. Press MODE and all segments will light up to allow
user to check the condition of display
g. Press TARE to quit and ON/ZERO to restart the scale
4.2.2 Select Auto Power Off Setting
The scale is equipped with Auto Power Off Function. The
scale will power off automatically if it is not used
for 4 minutes. Follow the below steps to enable/disable
Auto Power Off Function.
a. Scale is off
b. Press and hold TARE, then press ON/OFF
c. Scale displays F.1
d. Press TARE three times
e. Scale displays F.4
f. Press MODE to shift between 0_OFF and 4_OFF
-To enable Auto Power Off Function, press TARE when
4_OFF appears
-To disable Auto Power Off Function, press TARE when
0_OFF appears
g. Press ZERO to restart the scale or TARE for next
function setup
4.2.3 Select Auto Tare Function
This scale is equipped with an 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 platter.
a. Scale is off
b. Press and hold TARE, then press ON/OFF
c. Scale displays F.1
d. Press TARE four times
e. Scale displays F.9
f. Press MODE to select between ¡Tr_on¡¨ or TroFF¡
-To enable Auto Tare Function, press TARE when Tr_on
appears
-To disable Auto Tare Function, press TARE when TroFF
appears
g. Press TARE for next function setup or ZERO to restart
the scale
NOTE:
The Auto Tare Fu nction will not be access ible if the
unit is purchased as legal for trade.
5. INSTRUCTION FOR USE
5.1 BEFORE WEIGHING
Make sure that:
a. Connect the load cell signal and power to the
indicator properly.
b. Place the scale on a level and firm surface.
c. The indicator is turned on.
d. The ZERO INDICATOR is on. If not, press ZERO to set
display to zero.
5.2 WEIGHING
a. Always place an object onto the scale gently.
Excessive force applied to platter may cause damage
to weight sensor.
b. The weight of the object is displayed on the indicator
automatically.
c. It is a good practice to remove all loads from scale
after weighing. It will prolong the lifetime of
weight sensor.
5.3 SELECT WEIGHT UNIT
Press MODE to shift between metric or avoirdupois weight
units. The weight unit used before power off will be
employed when the scale is turned on again.
5.4 TURN BACKLIGHT (OPTIONAL) ON/OFF
Follow the below steps to turn on and off backlight ( if
purchased).
a. Scale is on
b. Press and hold ZERO until backlight is activated;
or press MODE to shift between metric and avoirdupois
weight to turn on and off backlight
When backlight function is employed, it will
automatically turn off when a stable weight remains for
25 seconds or a zero weight is detected and remains stable
for 10 seconds. Backlight will be automatically turned
on again when a new weight is detected or when any key
is pressed.
5.5 SET DISPLAYED VALUE TO ZERO WHEN UNLOADED
By pressing ZERO, weight displayed will be set to zero
and ZERO INDICATOR appears.
Refer to SPECIFICATIONS for maximum zero range.
NOTE:
-When the operating environment is unstable, scale
memorizes the command and will take place when
environment is stable
5.6 TARE OFF THE WEIGHT OF A CONTAINER
When a container is used, follow the steps below to
manually tare off the weight of container and get the
net weight.
a. Remove all loads away from platter
b. Make sure that the ZERO INDICATOR is on.
c. Place the container on the platter.
d. Press TARE.
After TARE is pressed, the NET INDICATOR will appear.
Refer to 5.2 for weighing procedures. Weight displayed
under is the net weight of the subject matter. Refer
to SPECIFICATIONS for maximum tare range.
NOTE:
-When the operating environment is unstable, scale
memorizes the command and will complete the command when
the environment is stable
5.7 CLEAR THE TARE FUNCTION
a. Remove all loads from platter
b. The tare effect will be cancelled:
-Automatically if automatic tare function is
employed, or
-By pressing TARE
c. After TARE is pressed, the NET INDICATOR would
disappear
5.8 MEMORY FUNCTION
5.8.1 Accumulate a Transaction To Memory
a. Refer to 5.2 for weighing producers
b. Press M+ to save and accumulate data of current
transaction to memory
c. Indicator displays ¡P. X¡¨ andM+ INDICATOR appears
to indicate that memory contains of stored data
d. Indicator returns to normal display status after 2
seconds
e. Repeat a to c for subsequent transactions
NOTE 1:
¡P. X¡¨ mans the total number of transactions accumulated
to memory
NOTE 2:
-When the operating environment is unstable, scale
memorizes the command and will complete the command when
the environment is stable
NOTE 3:
-Data stored in memory will be cleared when sw itching
to different weight unit
5.8.2 Memory Recall
Press MR to recall total accumulated weight from memory.
After MR is pressed, indicator displays P. X (X Means
the number of transactions accumulated), then a flashing
value. The flashing value is the total accumulated weight
stored in memory.
When the total accumulated weight is being displayed,
MR INDICATOR appears to indicator that the value being
displayed is the accumulated weight.
Indicator returns to normal display status after 3
seconds.
NOTE:
When scale is not at a zero weight status, MR will not
function. Remove all loads off the platter and try again
5.8.3 Memory Clear
Memory can be erased by:
-Press MR and ZERO simultaneously, or
-Weight unit is changed
NOTE:
When scale is not at a zero weight status, MC will not
function. Remove all loads off the platter and try again
5.9 LOW BATTERY
The low battery sign appears when input voltage is below
the lowest input limit. Please recharge the scale
immediately. Failure to do so may cause unrecove rable
damage to the rechargeable battery.
5.9.1 In the case of a Rechargeable Battery being used
The indicator will be power off in about 5 to 10 minutes.
Recharge the battery now.
5.9.2 In case of a Power Adaptor being used
Check power supply to indicator immediately.
NOTE:
If LO BAT status is detected during power on, indicator
shows P_OFF and the indicator will be powered off
automatically.
6. TROUBLE SHOOTING
Symptom Indicator cannot be turned on
Check: Is the indicator powered properly?
Action: Check power supply to indicator.
Symptom Indicator turned off automatically
Check Is Auto Power Off Function employed?
Action Refer to 4.2.2 to disable Auto Power Off
Function.
Check Is the LO-BAT INDICATOR on?
Action Check power supply.
Symptom Rated capacity cannot be reached
Check Is the NET INDICATOR on?
Action: Turn the indicator off. Remove all loads
and turn on again.
Check Is there anything obstructing the scale?
Action Remove all obstacles.
Symptom Blank display with only "kg" or "lb"
Check Is the load applied to scale excess the rated
capacity?
Action Remove all loads and try again.
Symptom Indicator displays
-----
Check Is the load cell signal cable connected to
the indicator properly?
Action Recheck signal cable connections.
Check Is load cell working properly?
Action Check load cell input/output.
Symptom Display shows 00000 after counting down
Check Is the load applied to platter above the
rated capacity of the scale?
Action Remove all loads from platter and try again.
Symptom Weighing result is not accurate
Check Is the scale placed on a level surface?
Action Install the scale on a level surface.
Check Is the scale affected by airflow, vibration
or RFI?
Action: Position the scale away from all
disturbances.
Check Is the indicator calibrated correctly?
Action Contact your dealer.
7. DAILY CARE AND MAINTENANCE
7.1 Clean the indicator with a soft and damp cloth.
If necessary, apply 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 indicator periodically.
Re-calibrate the indicator if necessary by
contacting your scale dealer.
7.4 Store indicator scale in a dry and clean place.
APPENDIX: ERROR CODES
P_OFF
Low battery status is detected during power on. Indicator
will shut off after this message appears.
Error
Error during calibration.
Case 1:
The 1st calibration weight entered is less than 1/3 of
rated capacity
Case 2:
The 2nd calibration weight entered is over the
rated capacity.
Case 3: The span value is not within the acceptable range.
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