Intelligent AXM-1500 User manual
1
MAINTENANCE MANUAL
AXM SERIES
CONTENTS
1. INTRODUCTION
2. SPECIFICATIONS
2.1 SYSTEM BLOCK DIAGRAM
2.2 PHYSICAL LAYOUT OF ELECTRICAL CONNECTION
2.3 GENERAL SPECIFICATIONS
3. INITIAL SETUP
3.1 INTERNAL FUNCTIONS AND SETTING METHODS
3.2 CALIBRATION
3.3 DISABLE CALIBRATION AND INTERNAL FUNCTIONS SETTING WITH JUMPER
SW.(JP1)
3.4 OFFSET AND SPAN VALUE DATA
4. TROUBLE SHOOTING
4.1 TROUBLE SHOOTING LOOP
4.2 PARTS AND COMPONENTS TROUBLE SHOOTING
5. ELECTRICAL CIRCUITRY
5.1 SCHEMATICS
5.2 PCB LAYOUT
6. BILL OF MATERIAL
7. APPENDIX
OCT 2009 REV 2
2
Specifications and Function Subject to Change without Notice
1. INTRODUCTION
The AXM series is designed and programmed according to the OIML R-76
Class III requirements.
This scale is sealed to prevent unauthorized access to internal parts.
Ender users should be advised not to undertake any trouble shooting
except those listed on the operation manual.
This maintenance manual contains of certain information that may result
in fraudulent use. Do not release any part of this manual to any end
users or un-authorized persons.
The internal mini jumper should be so set to prevent un-authorized
settings or alternations.
Should a load cell has been replaced, make sure that the protection
devices are properly set.
After servicing, it is necessary to go through all tests and procedures
to ensure the scale meets all the meteorological and approval
requirements.
Here are some features of the AXM series
1. Designed to meet OIML-R76 class III requirements.
2. Zero Indicator.
3. Net Indicator.
4. Negative Value Indicator.
5. Auto Tare Function.
6. Power on Zero Function.
7. Manual Zero Function.
8. Extended Display Function.
9. Auto Power Saving Function.
10. Metric/Avoirdupois Conversion Function.
11. Low battery warning signal.
12. 2 points Calibration.
13. Mini jumper to prevent end-user calibration.
14. Optional EL backlights.
15. Optional RS232C interface.
16. Optional Rear Display
17. Built-in rechargeable battery operated.
18. Battery operating time: 200 hours plus after charged.
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2. SPECIFICATION
2.1 SYSTEM BLOCK DIAGRAM
Description:
When a mass is placed on the platform, the load of the article is applied
to the load cell inside it.
The resistance to the excitation current in the strain gauge will then
changed and the analog output signal varies.
It is amplified and digitized continuously by the A/D converter into
a digital signal. Subsequently, the resulting count is processed and
managed by the CPU. The CPU refers to the instructions from the keyboard,
and then conveys the output data to LCD driver, which formats the data
into readout on the display panels.
LCD DRIVER
CPU
with ROM
E+
LOAD E-
CELL S+
S- POWER SUPPLY:
AC ADAPTOR
(9V/500mA)
RECHARGEABLE
BATTERY (6V 4Ah)
A/D UNIT
KEYBOARD
(4 KEYS)
L
CD
INTERFACE
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2.2 PHYSICAL LAYOUT OF ELECTRICAL CONNECTION
A
XM
-
4
0
-
X
O
PTIONAL REAR PISPLAY BOARD
LOAD CELL
RECHARGEABLE
BATTERY
6V 4Ah
DC JACK
MAIN BOARD
AXM-10-X
J
2
J
5
E+
E-
S+
S
-
J4
LCD
LCD
J
3
R
S
-
2
32 BOARD
R
S232C
-
1
B1
POWER BOARD
GM-20-X
J1
M
EMBRANE K/B
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2.3 GENERAL SPECIFICATION
2.3.1 Overall View
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2.3.2 Dimension:
Platter size：250 x 215mm
Overall size：250(W) x 285(D) x 105(H)mm
2.3.3 Model Specifications
Model Number Capacity (Max) Division (e)
AXM-1500 1500g 0.5g
AXM-3000 3000g 1g
AXM-6000 6000g 2g
AXM-15K 15kg 0.005kg
AXM-30K 30kg 0.01kg
SOFTWARE NUMBER CE019
Approval Class III
Maximum Tare Range 1/3 Max -1e
Power on Zero Range ±10% Max
Manual Zero Range ±2% Max
Min. Load 20e
Operation
Environment 0o~40oC (32o~104oF),
Non-condensed. R.H.≦85%
Power Consumption 0.5W (when charged)
2.3.4 Main Components Used
Microprocessors: SM8958
Crystal Oscillator: 11.0592MHz
Display Device: WTN Liquid Crystal Display
2.3.5 Analog Specification
- The maximum number of verification scale intervals will be:
n ≤3000 for class III instruments
- Power supply of 5 V DC;
- 16 bits serial digital output;
- Excitation power supply for the load cell is 5 V DC;
- Input impedance of the load cell is 350 Ω;
- The analog data processing unit is built in a closed metal box.
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3. INITIAL SETUP
3.1 INTERNAL FUNCTIONS AND SETTING METHODS
INTERNAL FUNCTION TABLE
Function Symbol Description
1 F1 Span value reading
2 F2 Full display segment check
3 F3 Scale configuration
4 F4 Auto power off setting
9 F9 Auto tare setting
19 F19 1/30000 Verification Mode**
20 F20 Gravity Compensation-place of calibration**
21 F21 Gravity Compensation-place to be used**
HOW TO ENTER THE REQUIRED FUNCTION MODE
a. Turn scale off.
b. Press and hold TARE, then turn scale on. Scale display F.1
c. Press TARE until the required function number appears.
d. Press MODE
e. Press MODE until the required setting appears.
f. Press TARE to confirm.
g. Repeat step c to f for other function setting, or
h. Press ON/ZERO to save settings and return to normal operation.
F1 Span Value Reading
a. Simply enter F1 to read the A/D counts.
b. Press ON/ZERO to clear the A/D counts, apply test mass onto platter,
the span value of test mass will be displayed.
F2 Full Display Segment Check
When function is entered, scale will firstly display the software
version, and then displays all segments later.
Check and make sure that no segments are missed.
F3 Scale Configuration
a. Enter F3, scale displays the offset value.
b. Press and hold MODE, available scale capacity and min.
division appears.
SELECT DISPLAY RESOLUTION
c. Press and hold MODE to change the display resolution.
SELECT WEIGHT UNITS
d. when desired display resolution is selected, press MODE
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to select weight units.
--To employ all (metric and pound/oz) weight units, press
MODE until ‘g’(kg), ‘lb’ indicators appear.
--To disable ‘lb’ weight unit, press MODE until ‘g’(kg)
indicator appears only.
SELECT SCALE CAPACITY
e. Press MODE to select the capacity, Press TARE to save
setting.
f. Re-calibration will be required after scale capacity
changed.
F4 Auto Power Off Setting
Two modes are available: (Default=4_OFF)
Press MODE until desired setting appear, press TARE to save
setting.
0_OFF = Auto Power Off function is disabled.
4_OFF = Scale will automatically turns it off after 4 minutes
unused.
F9 Auto Tare Setting
Two modes are available: (Default=TroFF)
TroFF = Auto tare function is disabled.
Tr_on = Scale will automatically tare off the initial weight that
places on the platter.
**
F19~F21 Reserved
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3.2 CALIBRATION
Dealer Calibration Procedures:
1. Turn scale off.
2. Press and hold TARE, then turn scale on.
3. Scale displays F1
4. Press MODE
5. Scale displays offset value
6. Press and hold MODE, Scale displays YES.
7. Scale will self calibrate zero point before proceed to the first
point calibration.
8. After zero point calibration is done, scale displays LOAD XXXX or
XXXX
9. Load calibration load as request.
10.Wait until scale displays LOAD XXXX(second point).
11.Load calibration load as request or press MODE to abandon second
point calibration, wait until scale displays DONE.
12.Calibration completed and scale is ready for operation.
Auto Calibration Procedures:
1. Turn scale off.
2. Press and hold MODE, then turn scale on.
3. Scale displays CAL.?
4. Press MODE again, Scale displays YES.
5. Scale will self calibrate zero point before proceed to the first
point calibration.
6. After zero point calibration is done, scale displays LOAD XXXX or
XXXX
7. Load calibration load as request.
8. Wait until scale displays LOAD XXXX(second point).
9. Load calibration load as request or press MODE to abandon second
point calibration, wait until scale displays DONE.
10.Calibration completed and scale is ready for operation.
Note
：
Auto calibration can only be performed when the span
value Is within +/-10% tolerance of dealer calibration.
3.3 DISABLE CALIBRATION AND INTERNAL FUNCTIONS SETTING WITH JUMPER
SW.(JP1)
The JP1 is used to control calibration and internal functions
setting(F1 and F3). move this jumper to CAL-LOCK position to disable
calibration and internal functions setting.
1
0
CAUTION:
IF THE SCALE WILL BE SOLD TO AN APPLICATION THAT IS LEGAL
FOR TRADE. IT IS HIGHLY RECOMMEND SETTING THE JUMPER TO
CAL-LOCK POSITION TO DISABLE THE CALIBRATION AND INTERNAL
FUNCTION SETTING.
3.4 OFFSET AND SPAN VALUE DATA
OFFSET AND SPAN VALUE DATA TABLE
Offset Value
(Thousand) Span Value(Thousand) Offset
Control Span Control(Ohm)
R9
10~14 30~60 at 33% of Max. R1, R2 150
READING OFFSET VALUE
1 Turn scale off
2 Remove all load from platter
3 Enter F3 and read the offset value
READING SPAN VALUE
1 Turn scale off
2 Remove all load from platter
3 Enter F1
4 Press ZERO
5 Apply load to platter. Span value according to load applied
will be displayed.
HOW TO ADJUST OFFSET VALUE
In case the offset value is out of range, change the resistors R1,R2
to obtain correct offset value.
HOW TO ADJUST SPAN VALUE
The span value is controlled by the resistor locating at R9, standard
resistor value of R9 is listed on the above table. If the required
span value is not attained, then change R9 resistor according to either
case below:
Span value too low: Decrease the resistance of R9.
Span value too high: Increase the resistance of R9.
This manual suits for next models
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