Tufner T903 User manual

tufner.com
T903 INDICATOR
USER’S MANUAL
Portable Static Weighing Indicator

TABLE OF CONTENTS
Safety Precautions 1
Preparations and Set Up 1
Features 2
Technical Parameters 2
Specications 3
Power Supply 3
Displays 4
Display and Key Descriptions 5
Operating Instructions 6-7
Calibration 8
Indicator Parameter Settings 9-11
Weighing/Printing Mode 12
Print Format 13
Connectors 14
Communication Settings 15
Printer 16
Troubleshooting 17
Contact Us 18

1
SAFETY PRECAUTIONS
For safe operation of the weighing indicator, please follow these
instructions:
●Calibration inspection and maintenance of the indicator are prohibited by non-pro-
fessional staff
●Please ensure that the indicator rests on a stable surface
●The indicator is a piece of static sensitive equipment; Please cut off power during
electrical connections
●Touching the internal components by hand is prohibited
●DO NOT exceed the rated load limit of the unit
●DO NOT step on the unit
●DO NOT jump on the scale
●DO NOT use this product if any of the components are cracked
●DO NOT use for purposes other then weight taking
●To avoid damaging the battery do not keep charger plugged in once battery is fully
charged
●Make sure the weight is not over the Max capacity as it could damage the load cell
inside
● Material that has a static electric charge could inuence the weighing. Discharge
the static electricity of the samples, if possible. Another
solution to the problem is to wipe both sides of the pan and the top of the case with
an anti-static agent
Please take anti-static prevention measures
Any accumulated charge on the body of the human operator should be discharged rst
before opening the protective container with ESDS devices inside. The discharge can
be accomplished by:
●Putting a hand on a grounded surface or, ideally, by wearing a grounded Anti-static
Wrist Strap and an Anti-static Mat
PREPARATION & SET UP
●Plug into a wall outlet to avoid interference with other wirings
●Turn on the indicator while there is no load
●We suggest to warm-up the indicator by powering on 5 minutes before use for
accurate weighing
●Calibration may be required before weighing when the indicator is initially installed
or moved from a location

2
FEATURES
●Designed to work with static axle scales
●Gross weighing and accumulative weighing modes
●LCD display (size: 5.3in x 1.4in)
●Tare, Zero, Print, Save, Check, and Delete functions
●Kg and lb weighing units
●Built-in needle printer
●Different printing formats
●6v/4.5Ah Battery and 9v/1.2A adapter
●Can connect to a secondary large display/scoreboard
●Can connect with up to 4 weighing pads
●Shows individual scale/pad percentage of the total weight
●Manual and automatic printing modes
●Date and time can be set easily
●Can connect to a PC or printer for data logging
●Wireless capability (optional)
●Splash proof keyboard and display
TECHNICAL PARAMETERS
● Sensitivity : 0.5μV/d
● Input voltage: -30 to +30mV DC
●Accuracy class : III
●Initial zero range : ±10%Max
●Manually zero range : ±2% Max
●Zero Range : 100% Max
●Zero Tracking : 0.5d/s
● Excitation circuit : VDC,6 wire connection,Maximum connect 24 load cell of 350Ω
● AC power: AC 100-250VAC,50/60HZ (use only the 9V adapter supplied)
●Operation temperature humidity : -10°C ~ +40°C
● Operation humidity: ≤90%RH
●Storage temperature : -10°C ~ +40°C

3
SPECIFICATIONS
FIGURE 1: INDICATOR MEASUREMENTS
POWER SUPPLY
Battery
Your indicator comes with a rechargeable battery, please charge the internal battery
fully before rst time use. A 110 to 220V AC adapter should be provided with your
indicator. Please use only the AC adapter provided to prevent damage to your indicator.
● When you use the internal battery for the rst time,you should charge the battery
fully, to prevent low voltage resulted from self leakage of battery
●If the battery is not used for long time, remove to avoid leakage
●To keep the battery in best condition, fully discharge the battery every month by
leaving the indicator on until the indicator powers off, and then recharge fully
●symbol will indicate the battery’s charge
●symbol indicates that the battery needs to be charged
11.8 in
5.5 in

4
T903 DISPLAY

5
DISPLAY AND KEY DESCRIPTION
ON/OFF Powers the Indicator On or Off if held for 2 seconds
SWITCH Switch the weight between the pad weight and the total weight
CHECK Check and read the saved weight data to print
KG/LB Shifts between weighing units (kg/lb)
TARE 1. Zero’s the scale. Used when using a container to hold objects
2. Clears the tare to see the gross weight
ZERO Zero’s the scale
STORE In accumulative weighing mode it accumulates the axle weight and
prints the weight data
PRINT 1. Print data
2. Works with the switch button to enter the calibration menu
Total Shows you are in Accumulation mode
The scale is at zero
The scale is stable
Net Shows you are in Net weight mode (without tare)
Gross Shows you are in Gross weight mode (includes tare); default mode
Tare Shows you have tared the scale
Indicates the charge of the battery
lb The weight is shown in pounds
kg The weight is shown in kilograms
Shows the percentage of weight on the pad out of the total weight
LFW The weight of the Left front wheel
RFW The weight of the Right front wheel
LRW The weight of the Left rear wheel
RRW The weight of the Right rear wheel
Power
Back
Save and Exit
Arrow keys
Return/Enter

6
OPERATING INSTRUCTIONS
Power On
●Turn on the power by pressing the power button for 2 seconds. Once on, the scale
will ash the voltage and then begin to auto-check and count down from 0-9
sequentially before entering the weighing mode
Note: Anything on the scale before powering on will automatically be tared out.
Zeroing
●The zero function is used only when the scale is empty and is not at gross zero due
to material build up
●Pressing the ZERO key will reset your scale to 0
●Depending on what your manual zero range parameter is set to, you can zero out
any number within your set selection, after that you will receive an error and will
need to tare out the weight
Unit Selection
●To switch between measuring units (kg or lb) press the KG/LB key
Tare Function
●The Tare function is used when you only wish to see the current change in weight,
not the entire amount of weight that is on the scale
●When the indicator is in normal gross mode pressing the TARE key will Tare the
current weight on the scale and enter the net mode
●To exit Tare mode press the TARE key again to enter gross mode
To use a pre-set tare weight
●Press and hold the tare key for 2 seconds
●Input the tare weight using the arrow keys
● Press print key to conrm
Check
●The check key is used check previously saved weights
● In weighing mode, press CHECK key to show “C####”
● ex. if there are 30 records saved it will display “C 0030”
● If you wanted to check the 20th saved weight you would input “C 0020” and
press PRINT to check the 20th record
● The display will show “REAd-0”. Choose “1” and press PRINT
● The screen will ash the date, time, axle, tare weight and total weight one by one
● Then the screen will show “Print 0”, enter “1” and press PRINT to print this
record and go back to the Checking display “C 0020”
● Press CHECK key again to exit and return to weighing mode

7
Switch
●Switches the display between the total weight and each individual pad/scale weight
●Individual pad display shows the percentage of that pads load, of the total weight
Print
●If the weight on the scale is stable press the PRINT key to print the current weight

8
CALIBRATION PROCEDURE
1. Turn on the scale by holding the ON/OFF key. (If the scale does not turn on, plug in the
ac adapter because the battery may be low.)
2. Once on hold SWITCH and PRINT key to enter the indicator settings mode
3. The display will show [F 1] to indicate F1 settings mode, use the STORE key to
change to [F 2]
4. Press the PRINT key to select and enter the F2 settings mode
5. The display will read [SCALE1]
6. Use the arrow keys to select which scale/pad you will be calibrating (1-4)
7. Press the PRINT key to select and enter the next setting
8. The display will read [CAL-0], use the STORE key to change to [CAL-1]
9. With nothing on the scale/pad press PRINT to Zero Calibrate, the indicator will count
down from 9-0 and enter the next parameter if no errors
10. The display will show [SPAN-0] use the STORE key to change to [SPAN-1], press
the PRINT key to select and enter the calibration setting
11. Use the arrow keys to enter the weight of the calibration weight you will be using
(calibration weight must be at least 40% of the scale/pads capacity)
12. Load the calibration weight on the pad/scale you are calibrating
13. Once stable press the PRINT key to calibrate
14. The indicator will count down from 9-0 and move on to the Save parameter [SAVE-0]
15. Press STORE to change to [SAVE-1], then save your calibration by pressing PRINT
16. The indicator will display [F 2], Press CHECK to exit the settings mode and go
back to the weighing mode
17. The display will show the value of the calibration weight on the scale
18. Unload the scale; the display should read [000000]
19. If no errors the scale has now been calibrated
20. Repeat process until all pads/scales have been calibrated and saved

9
INDICATOR PARAMETER SETTINGS
This indicator has 5 different setting modes, [F 1], [F 2], [F 3], [F 4] & [F 5].
Each mode changes different indicator parameters.
To enter calibration/parameter settings, follow the procedure below:
1. Press and hold the SWITCH and PRINT key at the same time for 2 seconds
2. Navigate through the setting modes (F1 to F5) by using the arrow keys and return keys as
labeled under each indicator button ( , , , )
3. Press the PRINT key to enter/edit the parameter setting
4. Press the CHECK key to save and exit settings at any time
F 1 Menu
Setting working mode, unit, decimal, graduation, and capacity
Step Parameter Display Settings/Options
Enter F1 Menu F 1
1Mode Mode 2 Choose how many weighing pad’s you’ll be using
Options: 1/2/3/4
2Unit Unit-0 Choose default unit
0=kg
1=lb
3Decimal setting dot--2 0 = no decimal
1 = #.#
2 = #.##
3 = #.###
4 = #.####
4Graduation Setting
(readability of the least
signicant digit)
E - 05 Options: 1/2/4/10/20/50
Example with no decimal places (ie step 3=0)
1 = 1 lb
2 = 2 lb
5 = 5 lb
10 = 10 lb
20 = 20 lb
50 = 50 lb
5Max Capacity Full-0 0 = do not change the max capacity
1= change the max capacity
ex. If step 2=0 and step 3=2
when changing max capacity 0100.00 = 100kg
Then press to save your settings

10
F 2 Menu
Setting the Choosing a pad to calibrate, zero calibration, loading calibration, and saving
Step Parameter Display Settings/Options
Enter F2 Menu F 2
6Pad Choice SCALE 1 Choose a pad/scale to calibrate
Options: 1/2/3/4
7Zero Calibration CAL--0 0 = do not calibrate
1 = calibrate
Note: when 1 is selected the indicator will count down
from 9-0 and move on to the next setting
8Calibration SPAN-0 When ready for calibration, setting the span tells the
indicator the weight you will be calibrating the scale with
0 = do not set the span
1 = set the span
Use the arrow keys to set your calibration weight and
when done load your calibration weight to the scale
Once stable press to calibrate
The indicator will count down from 9-0 and move on to
the Saving parameter (Select 1 and press print to save
your calibration settings)
9Save SAVE-0 0 = do not save calibration
1 = save calibration
F 3 Menu
Step Parameter Display Settings/Options
Enter F3 Menu F 3
10 Axle Number ALE-02 Set the number of axles (for use with accumulation
mode)
11 Cargo Number SN--00 Set the cargo number
12 Printing Format PF - 1 0 = No printing
1 = Normal printing format
2 = Accumulative printing format
* See page 13 for examples
13 Printing Method PM - 1 0 = Manual
1 = Automatic
*Manual is recommended for the most precise results
14 Printing Coupon PC - 1 Printing coupon numbers setting
Options: 1/2/3
15 Baud Rate Baud-1 Options: 1/2/3/4/5/6/7/8
0 = 600 1 = 1200 2 = 2400
3 = 4800 4 = 9600 5 = 19200
6 = 38400 7 = 57600 8 = 115200
16 Communication
Settings CP - 1 0 = Communication off 1 = Communication format 1 for PC
2 = Communication format 2 for second display
(YAO HUA MODEL)
3 = Communication format 3 for second display
(TOLEDO MODEL)

11
Step Parameter Display Settings/Options
17 Automatic Power Off OFF-00 00 = turn off auto power off
10 = power off automatically if no change within 10 min
30 = power off automatically if no change within 30 min
60 = power off automatically if no change within 60 min
18 Back Light BL--00 00 = Backlight on
10 = Backlight off after 10 seconds
19 Date Format Date-0 0 = year, month, day
1 = month, day , year
2 = day, month, year
20 Date 30.07.13 Set according to previous parameter
21 Time 14:13:20 Set using Military time
F 4 Menu
Step Parameter Display Settings/Options
Enter F4 Menu F 4
22 Records S-0560 Set how many records/weights you want your indicator
to store
Max. the indicator can store is 2000 cps.
23 PCB HE-1.0A PCB version 1.0A
24 Software SE-1.00 Software version 1.00
25 LFW LFWcode Check the left front wheel ad code
26 RFW RFWcode Check the right front wheel ad code
27 LRW LRWcode Check the left back wheel ad code
28 RRW RRWcode Check the right back wheel ad code
F 5 Menu
Step Parameter Display Settings/Options
Enter F5 Menu F 5
29 Delete Weighing
Records dELA-0 0 = Do not delete the weighing record 1 = Delete the weighing record
30 Delete All dEAL-0 0 = Do not delete all the records
1 = Delete all the records

12
WEIGHING/PRINTING MODES
In the Parameters you can set to have your printer print automatically or manually, we
recommend setting to manual (F3 [PM - 0]) for best results.
Normal Weighing mode:
●In the F3 menu set the Printing Format to “1” [PF - 1]
●In this mode you have the option of using 1-4 pads [ModE 3]
Example : There are 3 weighing pads connected to the indicator to weigh an airplane.
1. The pads should connect with LFW,LRW,RRW interfaces
2. Parameter settings: F1 Working Mode setting: “3” [ModE 3]
F3 Printing Format setting: “1” [PF - 1]
3. Drive the plane on the pads. You can press the “SWITCH” key to switch between
displaying the total weight, and the weight of each pad, shown with the
percentage of that pads load of the total weight
●If [PM - 1] Printing and Saving will be done automatically once the load is stable
● If [PM - 0] Press the “PRINT” key to print results
Accumulative weighing mode:
●In the F3 menu set the printing format to “2” [PF - 2]
●In this mode you have the option of using 2 or 4 pads [ModE 2]
●The Print mode must be set to manual to function correctly [PM - 0]
● Press the “STORE” key to accumulate the axle weigh and print axle data
●Repeat previous step until all axles have been weighed
● Then press the “PRINT” key to print the nal accumulative weight and save
Example: There are 2 weighing pads connected to the indicator to weigh a truck with
three axles.
4. The pads should connect with LFW, RFW interfaces
5. Parameter settings: F1 Working Mode setting: “2” [ModE 2]
F3 Printing Format setting: “2” [PF - 2]
F3 Printing Mode setting: “0” [PM - 0]
F3 Axle Number setting: “3” [ALE-03]
6. Drive the rst axle of the truck on the weighing pads. Press the “STORE” key to
accumulate and to store the weight data and print the rst axle results
7. Drive the second axle of the truck on the weighing pads and Press the “STORE” key
to accumulate and store the weight data and print the second axle results
8. Drive the third axle of the truck on the weighing pads and Press the “STORE” key
to accumulate and store the weight data and print the third axle results
9. Then press the “PRINT” key to accumulate all three axle weights and print the total

13
PRINT FORMAT
Normal Printing Format
Single pad: Double pads: Three pads: Four pads:
WEIGHTING REPORT WEIGHTING REPORT WEIGHTING REPORT WEIGHTING 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
Gross: 429.0kg Axle1:842.5kg RRW: 293.0kg Axle1: 842.5kg
Operator: ---------------- Axle2: 612.0kg LRW: 319.0kg
Gross: 842.5kg ---------------- RRW: 293.0kg
Operator: Gross: 1041.0kg Axle2: 612.0kg
Operator: -------------------
Gross: 1454.5kg
Operator:
Accumulative Printing Format
Double pads:(Double axles) Four pads:(Four axles)
WEIGHTING REPORT WEIGHTING REPORT
------------------------------ ------------------------------
NO. : 0594 NO. : 0594
Date: 2013-11-02 Date: 2013-11-02
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
Gross: 1447.0kg RFW: 419.5kg
TOperator: Axle03: 840.0kg
LRW: 309.5kg
RRW: 297.0kg
Axle04: 607.0kg
------------------------------
Gross: 2894.0kg
Operator:

14
CONNECTORS
Connecting load cells to the indicator
● T903 can connect with 4 weighing pads or 24 pcs of load cells of 350Ω at most
QUICK DISCONNECT AS SHOWN BELOW:
The number of weighing pads and load cells corresponds to the weighing modes. If the
pads or load cells are not connected properly the indicator will not function properly.
Please use the following table to connect your pads correctly.
INNER TERMINAL BLOCK CONNECTION DIAGRAM
Weighing Pad # Load Cell Connection Weighing Mode
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”
DB9 Connection (9 pin Serial Connector)
RS232: DB9 SERIAL CONNECTOR PINOUT
Pin function and denition are bellow:
DB9 Pin Denition Function
2 TXT Transmit Data
3 RXD Receive Data
5 GND Ground Interface

15
COMMUNICATION SETTINGS
Format 1 [CP - 1]
Workable with a PC
RS232COM serial interface can receive simple ASCII command.
RS232 parameter:9600Bit/S Baud rate,8 digits,no check point,1 stop.
, , CR LF
{ { {
S 1 S 2 S 3 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
CR: carriage return
LF: line feed
Format 2 [CP - 2]
Workable with second display from Yaohua, Baud rate 600.
Format 3 [CP - 3]
Workable with second display from Toledo, Baud rate 1200.

16
PRINTER
To Remove lid:
Remove lid by pressing on the lower corner tabs and squeezing while pulling outwards
To Replace Ink:
Remove lid, then squeeze and pull forward on the pull tabs to pull printer forward from
indicator. Next hold ink cartridge on both sides and pull straight down. To replace, feed
paper through the new ink cartridge, then align the small holes located on the left side
of the ink cartridge with the gears located under the left pull tab. Push cartridge upwards
into place and push printer backwards into the indicator and replace lid.
To Replace Paper:
Remove lid, then squeeze and pull forward on the pull tabs to pull printer forward from
indicator. Carefully remove ink cartridge. If the paper roll is not empty use the feed but-
ton to empty the roll. Once roll is empty squeeze both sides of the roll holder and pull
forward. Remove old roll from the roll holder and replace with a new paper roll. Squeeze
both sides of the roll holder and replace back into the printer. Feed paper into the paper
slot while holding the feed button. Then feed paper into the ink cartridge. Push cartridge
upwards into place and push printer backwards into the indicator and replace lid.
Pull tab
Pull tab
Paper roll
Roll holderRoll holder
Feed
button
Ink
Cartridge
Ink
Cartridge
Paper slot

17
TROUBLESHOOTING
Error Codes
Error Reason Solution
UUUUUU
1. Overload
2. Wrong connection with load cell
3. Load cell has quality problem
1. Reduce the weight
2. Check load cell connection
3. Inspect load cell; Check the input/output
4. See Q&A section
nnnnnnn
1. Calibration is no good
2. Wrong connection with load cell
3. Load cell has quality problem
1. Make sure scale is level
2. Check load cell connection
3. Check load cell input and output resistance
4. See Q&A section
ERR1 During calibration, weight is not used or
the weight is above the max. capacity
Use correct weight within the dened range
ERR2
During calibration, the weight is below
the minimum required weight
The calibration weight minimum is 10% of
the max. capacity set in C04.
Recommended to use 60%-80% of max.
capacity if possible
ERR3 During calibration, the input signal is
negative
1. Check all wire connections
2. Check load cell
3. Recalibrate
4. PCB replacement needed if steps 1-3 fail
ERR4 During calibration signal is unstable After the platform is stable, start calibration
ERR5 EEPROM Error Change PCB
ERR6 Exceed Zero Range See Q&A section
ERR10 Scale was not stable when Zeroed Wait for the scale to stabilize before zeroing
ERR11 Zero function can not be used in Tare
mode
Go back to gross weighing, by pressing Tare
then you can Zero
ERR12 Out of the zero range Move the extra load
ERR15 Scale wasn’t stable when Tared Tare once the load is stable
ERR16 Tared without a load Add your load, then tare
ERR17 Out of tare range Decrease the tare weight
ERR25 The record you are trying to check does
not exist
Assure the record you are trying to check
exists
ERR30 Printing format wrong in accumulative
weighing mode
Set Printing format to setting “2”
ERR31 Working mode wrong in accumulative
weighing mode
Set Working mode setting to either “2 or 4”
ERR32 You are weighing over max. capacity
or you tried to print while the scale was
unstable
Reduce weight on the scale
Print after scale has stabilized
ERR33 Display Error, Printing with the indicator
in accumulative weighing mode
Print the total weight after accumulating the
weight of axles
ERR34 Printing error in normal Weighing mode Wait for the load to be stable, then print
ERR35 Printing format wrong in normal weighing
mode
Set Printing format to Setting “1”

18
CONTACT US
Please e-mail [e-mail] for any sales related questions.
Please e-mail [e-mail] for any support related questions.
Don’t forget to visit our website at:
tufner.com