Tufner T903 User manual

T903
Portable Static Weighing Indicator
User’s Manual
(4 Channels)
(6 Channels)

WARNING
Setting. Calibration Inspection and Maintain of the indicator is prohibited by Non-professional staff.
WARNING
Pls. make sure the weighing display have good ground in using.
Safety Instruction
For safety operation pls. follow the safety instruction.
WARNING
The indicator is the static and sensitive
equipment,cut off the power during electrical
connections, internal components touched by hand
is prohibited, and please take the measure of anti-
static.

LIST
LIST.......................................................................................................................................................... 1
1. PRODUCT INTRODUCTION...........................................................................................................1
1.1 MAIN FUNCTION............................................................................................................................................................ 1
1.2 TECHNICAL PARAMETER............................................................................................................................................ 1
1.3 DRAWING.......................................................................................................................................................................... 2
1.4 BATTERY INSTRUCTION.............................................................................................................................................. 2
2. INSTALLATION AND CALIBRATION...........................................................................................2
2.1 CHECK............................................................................................................................................................................... 2
2.2POWER SUPPLY CONNECTION...................................................................................................................................2
2.3 CONNECTION OF LOAD CELL AND INDICATOR....................................................................................................3
2.4 COMMUNICATION INTERFACE...................................................................................................................................4
3. BASIC OPERATION......................................................................................................................... 5
3.1 KEYPAD............................................................................................................................................................................. 5
3.2 POWER ON &OFF.........................................................................................................................................................6
3.3 ZERO OPERATION......................................................................................................................................................... 6
3.4 TARE OPERATION..........................................................................................................................................................6
3.5 UNIT SWITCH..................................................................................................................................................................7
3.6 CHECKING........................................................................................................................................................................7
3.7 SWITCHING...................................................................................................................................................................... 7
3.8 PRINTING..........................................................................................................................................................................7
4. CALIBRATION AND PARAMETER SETTING............................................................................ 7
4.1 ENTER SETTING............................................................................................................................................................. 7
4.2 STEP OF CALIBRATION OPERATION........................................................................................................................8
4.3 APPLICATION FUNCTION PARAMETERS SETTING CHART.................................................................. 9
5.SERIAL INTERFACE RECEPTION COMMAND........................................................................11
5.1 COMMAND 1................................................................................................................................. 11
5.2 COMMAND 2.................................................................................................................................12
6.PRINT FORMAT............................................................................................................................... 12
6.1 NORMAL PRINTING FORMAT.................................................................................................................................. 12
6.2 ACCUMULATIVE PRINTING FORMAT..................................................................................................................... 12
7.MAINTENANCE................................................................................................................................13
7.1 REGULAR ERROR AND SOLUTION.........................................................................................................................13
7.2 DAILY MAINTAIN...........................................................................................................................................................14
7.3PACKING LIST................................................................................................................................................................ 15

1
1. Product Introduction
1.1 Main Function
Portable Static Weighing Indicator MWI01 is designed for static axle scale. It can
connect with 1,2,3,4,5,6 weighing pads to weigh the truck. It owns manual weighing mode
and automatic weighing mode. It can be normal weighing or accumulative weighing.
Varied weighing ways to meet different requirements.
LCD display (size: 136mm x 36.5mm) show the real weight date on the weighing pad.
The unit KG/LB display can be adjusted by the key on the instrument. At same time, the
percentage of each pad on the total weighing is displayed too. Other function includes
tare, zero, print, save, check, delete.
The power supply by 7.4v/4400mAh battery and it can be recharged by 8.4v/1A
adapter. Built-in thermal printer, several printing formats; with RS232 interface for
computer; The calendar is in the software. Date and time can be checked easily. Easy
operation, high precision, good application.
1.2 Technical parameter
>> Sensitivity 0.5u
v/d
>> Input voltage -30~
30mV
>> Accuracy class III
>> Initial zero range ±10
%Max
>> Manually zero range ±2
% Max
>> Zero Range 100
% Max
>> Zero Tracking 0.5
d/s
>> Excitation circuit VDC
,6 wire connection,Maximum connect 24 load cell of 350Ω
>> AC power 100
~240VAC,50/60HZ
>> Operation temperature hum
idity -10℃～+40℃,≤90%RH
>> Storage temperature
-10℃～+40℃

2
1.3 drawing
1.4 Battery instruction
1. when you use the internal battery first time,you should charge the battery fully,
to prevent low voltage resulted from self leakage of battery.
2. when the “ ” is flashing, it means low battery, pls. charge it in time.
3. when and no flashing, it means fully charged
4. if battery is not used for long time, take it out to avoid the leakage.
5. In order to keep the battery in best using condition, it is suggest that you fully
discharge the battery every month, the method is that using the indicator till it is
automatically power off.
2. Installation and calibration
2.1 Check
Open the box and check all items according to the packing list. If som missed or
broken, please contact with our company immediately.
2.2Power supply connection
The indicator is powered by adapter, you plug the adapter directly into the “DC” pin
at the back cover the indicator is ok.

3
2.3 Connection of load cell and indicator
The indicator can connect with 4 weighing pads or 24 pcs of load cells 350Ω at most.
Quick disconnect of load cell as below.
The number of weighing pads and load cells correspond to the weighing modes. If
the pads or load cells are connected at the right way, the indicator can’t work. Please pay
attention to the below.
Number of
Load cell connection
Weighing mode
weighing pad
1
LFW
[ModE 1]Setting “1”
2
LFW,RFW
[ModE 2]Setting “2”
3
LFW,LRW,RRW
[ModE 3]Setting “3”
4
LFW,RFW,LRW,RRW
[ModE 4]Setting “4”
5
LFW，RFW，LRW，RRW，
LFW/RFW
[ModE 5]Setting “5”
6
LFW，RFW，LRW，
RRW,LFW/RFW,RFW/LRW
[ModE 6]Setting “6”
Normal weighing mode and accumulative weighing mode can work with the printer
to print the weighing data.
Normal Weighing mode:
To set the printing format “1”, the indicator is in normal weighing mode. It can
connect 1/2/3/4/ pads to weigh and “Print” the weighing data and save.
Example:3 weighing pads connect with indicator to weigh the airplane.
a. The pads should connect with LFW,LRW,RRW interfaces;
b. parameter setting:working mode[ModE 3]setting “3”;printing format[PF - 1]setting
“1”;
c. Drive the plane on the pads. Press “switch” button, indicator can display the total
weight and the weight of each pad and the percentage of each pad weight from the
total weight.If printing format setting”1”, the weighing data can print automatically
and save after stable.If printing format setting”0”, the weighing data will print and
save manually.
Accumulative weighing mode:
To set printing format ”2”, the indicator is in accumulative weighing mode. Now 2/4

4
pads should be connected with the indicator. And press ”store” button to accumulate
the axle weigh and print. Then press “printing” to print the final accumulative weight and

5
save.
Example:Two pads work with the indicator to weigh a truck with three axles.
a. The pads should connect with LFW,RFW interfaces;
b. Parameter setting:working mode[ModE 2] setting“2”;printing format[PF -
2]setting“2”;Axles [ALE - 3]setting“3”.
c. Drive the first axle of the truck on the weighing pads. Press ”Switch” button,
indicator can display the axle weight and the each weight of the wheels and the
percentage of each wheel weight from the axle weight. If printing format setting “1”, the
weighing data can print and save automatically after weighing stable;If printing format
setting”0”, the weighing data will print and save manually by press “ store” button.
d. Drive the second axle of the truck on the weighing pads and repeat the
operation same as step C, accumulate and print the second axle weight.
e. Drive the second axle of the truck on the weighing pads and repeat the operation
same as step C, accumulate and print the third axle weight.
f. After finishing the weight for three axles, if printing format setting”1”, the total
weight will print and save automatically; If printing format”0”, it will print manually by
press ”print” button.
2.4 Communication interface
RS232 :DB9 Pin definition as below.
Pin function and definition as bellows:
DB9 joint
Definition
Function
2
TXD
Sending data
3
RXD
Receiving data
5
GND
Ground interface

5
3. Basic operation
3.1 Keypad
LCD
Instruction
Weighing data
Kg/lb
Weighing unit: kg/lb
Percentage,show how many percentage the pad weight take on
the whole weight
Tare
Tare
Gross
Gross weight
Net
Net weight
The weighing data is stable
Weight is zero
LFW
The weight of the left front wheel
RFW
The weight of the right front wheel
LRW
The weight of the left back wheel
RRW
The weight of the right back wheel
Total
Go to accumulation mode
Keys function
keys
Key name
Key function
Print
1.Printing the weighing data as weighing.
2.Working with the switch button to get into the menu
of calibration.
Store
In accumulative weighing mode, to accumulate the
axle weight and print the weight data.

6
Zero
Zero the weight within tolerance
Tare
At G.W mode, get the tare weight. At N.W mode,
clear the tare, get the G.W
Kg/lb
Covert between kg and lb
convert
Check
Check and read the saved weight data to print.
Switch
Switch the weight between the pad weight and the
total weight.
Power
Press 2 seconds to power on or power off
on/off
3.2 Power on & off
Press the "on/off" key for 2 seconds in the shutdown state, and the indicator will start
automatically; Press the "on/off" key for 2 seconds when the indicator is powered on.
When the indicator is powered on, you can check whether there are abnormal strokes or
LCD status indications according to the display, and then enter the weighing state.
3.3 Zero operation
Within the tolerance, “Zero” key clear the weight on all weighing pads. When the
pads unstable or loading over zero range or on tare mode, indicator can’t ZERO and
show ERROR.
3.4 Tare operation
In normal weighing mode, press ”Tare” button to make the load be tare weight; In
accumulative weighing mode, press “Tare” button to preset the tare weight and press
“ print” button to confirm the tare weight. The lights on the keypad is showing. In Tare
mode, press “Tare” button to deduct the tare weight from the total weight and show the
net weight.
NOTE:Tare mode only show on the total weight display.

7
3.5 Unit Switch
To press “Unit” button for switching the unit between “KG” and “LB”.
3.6 Checking
Weighing mode, press “Check” button to show “C 0030” (30 records existing), input
“C 0020” and press “ Print” to check 20th record. Display show “REAd-0”. Choosing”1” to
show date, time, axle, tare weight and total weight one by one. Then “Print 0”, choosing
“1” to print this record and back to the Checking display “C 0020”. Press “Check” Button
again to quit and back to weighing mode.
3.7 Switching
Weighing mode, press “Switch” button to change the display between the axle
weight and the total weight.
3.8 Printing
Manual weighing, press “print” button to print when the pad is stable.
Note:
1.Automatic accumulative weighing mode, press “Print” to print the total weight even if
the number of axle don’t reach the setting number.
2.Press”store”and “print”,to add the current weight data printing.
4. Calibration and Parameter setting
4.1 Enter setting
Press “ Switch” button 3-5 seconds to enter into the menu for setting F1-F5.
The key functions in setting:
ENTER UP
DOWN LEFT

8
RIGHT
EXIT THE MENU
4.2 Step of calibration operation
F1 menu:setting working mode, unit, decimal, graduation and span.
Step
Operation
Display
Remark
[F
1]
F1 menu
1
press
[Mode 2]
Weighing pad working mode:1/2/3/4
2
press
or
[CAL--0]
[CAL--1]
Zero Calibration：
0=Zero calibration is not performed.
1=Perform zero calibration.
press
to skip
3
press
or
Press
[dot--2]
Point number:0/1/2/3/4
Or press
to skip
4
press
or
[E - 05]
Graduation setting:1,2,5,10,20,50。
press
5
[Full-0]
0:no change of max capacity
press
or
[Full-1]
1:change the max capacity
press
6
[0500.00]
Setting the max span
press
or /
or
[1000.00]
Default division:10000,
display 500.00.
press
The max. span is 1000.00
F2 menu: Zero, loading calibration, save the calibration parameter.
Step
Operation
Display
Remark
[F
2]
F2 menu
1
press
[SCALE1]
[SCALE2]
[SCALE3]
[SCALE4]
[SCALE5]
Pad choose:calibration for the 1st pad
Pad choose:calibration for the 2nd pad
Pad choose:calibration for the 3rd pad
Pad choose:calibration for the 4th pad
Pad choose:calibration for the 5th pad

9
[SCALE6]
Pad choose:calibration for the 6th pad
2
[CAL--0]
Zero Calibration:
press
or
[CAL--1]
0=No need calibration
press
1= need calibration

10
or press to jump
3
[SPAN-0]
0=No need loading calibration
press
or
[SPAN-1]
1=loading calibration
press
or press
to
jump
[0100.00]
Loading calibration:
press or
/
or
Setting loading 100,00 an put the
100kg weight on the 2nd pad.
Loading choice: load the weight as
press
possible
As max capacity, at least 10%
4
[SAVE-0]
0=non-save the loading parameter
press
or
[SAVE-1]
1=save the loading parameter
press
F2 can set the mode(channel) to 0, so that all channels can be zeroed with one key, and
then each channel can be calibrated separately
4.3 Application function parameters setting chart
Step
Operation
Display
Remark
[F
3]
F3 menu
1
press
[ALE-02]
The number of axle settings
In accumulative weighing mode, the
number of axle should be pre-setted.
2
press
or
[SN--23]
Cargo number setting
press
3
[PF - 1]
Printing format setting
press
or
0: No printing
1:normal printing format
for normal
press
weighing.
2:Accumulative printing
format for
accumulative weighing.
4
[PM - 1]
Printing method
press
or
0: manual
press
1:automatic
5
[PC - 1]
Printing coupon numbers setting
press
or
1/2/3

11
press
6
[Baud-1]
Baud rating setting
press
or
0:600; 1:1200; 2:2400;
press
3:4800
4:9600; 5:19200;
6:38400 7:57600; 8:115200
7
[CP - 1]
Communication format setting
press
or
.
0: communication is off.
press
1: Communication format 1, connected to
PC.
8
[OFF-00]
Automatic power off
setting:
press
or
/
or
[OFF-10]
00: no power-off
press
Automatic power-offer after ten min.
9
[BL--00]
Back lit setting
press
or
/
or
[BL--10]
00:Back lit on
10:Back lit off after ten seconds.
press
Backlist
off: in zero
condition and no
operation.
10
[Date-0]
Date format.
press
or
[Date-2]
Format 0:year,month,day
press
Format 1:month,day,year
Format 2:day,month,year
11
[30.07.13]
Date setting:
press
or
/
or
[11.08.13]
press
[11.08.13]
12
[14:13:20]
Time setting:
press
or
/
or
[15:17:30]
press
[15:17:30]
Step
Operation
Display
Remark
[F
4]
F4 menu

12
1
press
[S-0560]
560 records in indicator. Max. recording
is 2000 cps.
2
press
[HE-1.0A]
PCB version 1.0A
3
press
[SE-1.00]
Software version 1.00
4
press
[LFW
Check the left front wheel ad code
code]
5
press
[RFW
Check the right front wheel ad code
code]
6
press
[LRW
Check the left back wheel ad code
code]
7
press
[RRW
Check the right back wheel ad code
code]
Ste
Operation
Display
Remark
p
[F
5]
F5 menu
1
press
[dELA-0]
0:No deleting the weighing record.
[dEAl-1]
1:Deleting the weighing record.
2
[dEAL-0]
0:No deleting all the records.
press
or
[dEAL-1]
1:deleting all the records.
press
F6 adds the function of restoring factory settings and equipment self-test
5.Serial interface reception command
5.1 Command 1
（RS232COM serial interface can receive simple ASCII command）
RS232 parameter:9600Bit/S Baud rate,8 digits,no check point,1 stop.
,
,
CR
LF
S0 S 1 S 2 S3 Data S 4
S1: weight status, ST= standstill, US= not standstill, OL= overload
S2: weight mode, GS= gross mode, NT= net mode
S3: weight of positive and negative, “+” or ” –
“ S4:“kg” or “lb”
Data: weight value, including decimal point

13
CR: carriage return
LF: line feed
5.2 Command 2
（workable with second display from Yaohua, Baud rate 600）
6.Print format
6.1 Normal Printing format
Single pad：
Double pads：
Three pads:
Four pads：
WEIGHING REPORT
WEIGHING REPORT
WEIGHING REPORT
WEIGHING REPORT
------------------------------
------------------------------
------------------------------
------------------------------
NO. : 0575
NO. : 0575
NO. : 0575
NO. : 0575
Date: 2013-11-02
Date: 2013-11-02
Date: 2013-11-02
Date: 2013-11-02
Time: 09:59:04
Time: 09:59:04
Time: 09:59:04
Time: 09:59:04
Vehicle:
Vehicle:
Vehicle:
Vehicle:
Cargo:34
Cargo:34
Cargo:34
Cargo:34
LFW: 429.0kg
LFW:429.0kg
FW:
429.0kg
LFW: 429.0kg
----------------
RFW:413.5kg
LRW:
319.0kg
RFW: 413.5kg
Net: 429.0kg
Axle1:842.5kg
RRW:
293.0kg
Axle1: 842.5kg
Tare:0.0kg
----------------
Axle2:
612.0kg
LRW: 319.0kg
Gross: 429.0kg
Net:842.5kg
----------------
RRW: 293.0kg
Operator:
Tare:0.0kg
Net: 1041.0kg
Axle2: 612.0kg
Gross: 842.5kg
Tare:0.0kg
-------------------
Operator:
Gross: 1041.0kg
Net: 1454.5kg
Operator:
Tare:0.0kg
Gross: 1454.5kg
Operator:
6.2 Accumulative printing format
Double pads（Double axles）Four pads：（Four axles）
WEIGHING REPORT WEIGHING REPORT
------------------------------ ------------------------------
NO. : 0594 NO. : 0594
Date: 2013-11-02 Date: 2013-11-02

14
Time: 11:10:41
Time: 11:10:41
Vehicle:
Vehicle:
Cargo:34
Cargo:34
LW:
420.5kg
LFW:
420.5kg
RW:
419.5kg
RFW:
419.5kg
Axle01:
840.0kg
Axle01:
840.0kg
LW:
309.5kg
LRW:
309.5kg
RW:
297.0kg
RRW:
297.0kg
Axle02:
607.0kg
Axle02:
607.0kg
------------------------------
LFW:
420.5kg
Net: 1447.0kg
RFW:
419.5kg
Tare:0.0kg
Axle03:
840.0kg
Gross: 1447.0kg
LRW:
309.5kg
Operater:
RRW:
297.0kg
Axle04:
607.0kg
------------------------------
Net: 2894.0kg
Tare:0.0kg
Gross:
2894.0kg
Operater:
7.Maintenance
7.1 Regular error and solution
ERROR
REASON
SOLUTION
UUUUUU
1.Overload
1. reduce the weight
2.wrong
connection
2. check load cell connection
with load cell
3. inspection load cell. Check
3. load cell has quality
the input and output
problem.
nnnnnnn
1.calibration is no good
1. check scale is resisted or
2. wrong connection
not, foot is kept level or not.
3. load cell has quality
2. check load cell connection.
problem
3. checking load cell
ERR10
Zering, not on stable
Zering, on stable weighing
weighing condition.
condition
ERR11
Zero and tare at same
Back to G.W, then Zero
time.
ERR12
Out of the zero range
Move the extra load
ERR15
Tare, no
on stable
Tare after stable weighing

15
ERR16
weighing condition
Tare when no load
To load some, then tare
ERR17
ERR25
ERR30
ERR31
ERR32
ERR33
ERR34
ERR35
Out of tare range
The S/N number wrong
when checking the
weighing record
Printing format wrong
at accumulative
weighing mode
Working mode wrong at
accumulative weighing
mode
Weighing over the span
Or display range or
unstable or failure of
zero at accumulative
weighing mode.
Display Error, Printing
with the indicator at
accumulative weighing
mode.
Printing error at normal
Weighing mode.
Printing format wrong at
normal weighing mode.
Decrease the tare weight
Assure the S/N number within
the
Number of records
Printing format setting”2”
Working mode setting”2/4”
Load properly at zeroing, then
printing after data stable.
Print the total weight after
accumulating the weight of
axles.
Stable then printing
Setting”1”
7.2 Daily maintain
1. Protect the indicator from strong sunlight to prolong the using life.
2. Good connection between load cell and indicator. Far from away from strong electric
field, magnetic field.
3. Power off the indicator when lightning.
4. Power off the indicator firstly before plug and unplug.

16
7.3Packing list
Packing list
S/N
ITEM
NAME
UNIT
QTY
PACKING
1
Weighing
PCS
1
indicator
2
Plastic bag
PCS
1
3
Accessories bag
PCS
1
4
Adapter
China/DC8.4V
PCS
1
US/DC8.4V
PCS
1
UK/DC/8.4V
PCS
1
EU/DC8.4V
PCS
1
AU/DC8.4V
PCS
1
OTHERS
PCS
1
5
USER MANUAL
PCS
1
6
RS232
3-core aviation
plug
PCS
1
7
Serial port plug
DB9-9 core
PCS
1
8
Certificate
PCS
1
9
Packing list
PCS
1