Totalcomp M301 User manual

Weighing Indicator
REV: C1, November, 2014
(v3.09-3.014A)
M301/M307
Personal Scales

M301/M307 Series Personal Scales Technical Manual
- 1 -
CONTENTS
1. PRECAUTIONS……………………………………………………………..2
2. INTRODUCTION……………………………………………………………3
3. SPECIFICATIONS……………………………………………………….....4
3.1Specifications………………………………………………………………...4
3.2 Load Cell Specification...............................................................…...5
4. INSTALLATION……….…………………………………………………….6
5. DESCRIPTION……….....................................................................8
6. OPERATION………………………………………………………………..10
1. Power ON/OFF…………………………………………………………10
2. Zero……………………………………………………………………...10
3. Tare……………………………………………………………………...10
4. Change unit………………………………………………………………...10
5. Hold function…………………………………………………………....11
6. Print and function……………….…………………………………….11
7. BMI function…………………………………………………………….11
8. Precision*10…………………..……………………………………………11
7. PARAMETER……………………………………………………………….12
8. CALIBRATION……………………………………………………………..14
9. PRINT FORMAT..……………………………………………………………..16
10.BATTERY OPERATION…………………………………………………..17
11.MAINTENANCE……………………………………………………………18
10.1 General………………………………………………………………..18
10.2 Error codes……………………………………………………………19
10.3 Determine the Problem……………………………………………...19
10.4 Check the Load Cell…………………………………………………20
10.5 Check PCB Voltages………………………………………………...20
10.6 Trouble Shooting……………………………………………………..21
12.DISPOSAL……………………………………………………………………23
13.WARRANTY……………………………………………………………………24

M301/M307 Series Personal Scales Technical Manual
- 2 -
1. PRECAUTIONS
WARNING
DISCONNECT ALL POWER TO THIS UNIT
BEFORE INSTALLING, CLEANING, OR
SERVICING. FAILURE TO DO SO COULD
RESULT IN BODILY HARM OR DAMAGE THE
UNIT.
CAUTION
Permit only qualified persons to service the instrument
Before connecting or disconnecting any components, remove the
power.
Failure to observe these precautions bodily harm or damage to or
destruction of the equipment.
Follow the instructions in the instructions for use.
Keep the operating instructions and the declaration of
conformity in a safe place.
Ensure that the scale is standing firmly on a smooth, level
surface.
Do not drop the scale or subject it to violent shocks.
When using the scale with a mains unit, ensure that the
supply cable is routed in such a way as to exclude any type
of tripping hazard.
Use only the type of battery stated.
Have scale serviced and re-calibrated on a regular basis.
Have repairs carried out only by authorized persons.

M301/M307 Series Personal Scales Technical Manual
- 3 -
2. INTRODUCTION
The M301/M307 series personal scales, that amplifies signals from a load
cell, converts it to digital data and displays it as a mass value.
BMI with bar graph.
Wheels at bottom, easy to move.
Rubber mat on the surface of the platform.
25 mm LCD with white LED back light display
7 keypads are light touch switches
Battery provide up to 22 hours of continues use (without backlight)
Capacity up to 250kg / 550lb
Height measurement: 90cm---200cm or 35inch---80 inch.(M301)

M301/M307 Series Personal Scales Technical Manual
- 4 -
3. SPECIFICATION
3.1 Specifications
Model
M301/M307
Maximum Capacity
250kg/550lb
Readability
100g
Resolution
1/2,500
Tare range
-249.9kg
Minimum Capacity
200g
Linearity ±
20g
Common Specifications
Interface
RS-232 Output Optional
Stabilisation Time
2 Seconds typical
Operating Temperature
0°C - 40°C / 32°F - 104°F
Power supply (external)
12V/500mA AC power adapter or 2000mAh Ni-MH
batteries (optional, size AA)
Calibration
Automatic External
Calibration as per Directive
90/384/EEC
Class III medical approval
Medical product as per
Directive 93/42/EEC
Class I
ADC
Σ-Δ
Display
25 mm high 6 digits LCD with auto backlight and
loading bar graph
Housing
Aluminium pan and pole, ABS plastic indicator
Pan Size
355x360mm
Height measuring range
From approx. 90cm to 200 cm (2'11'' to 6'8'')

M301/M307 Series Personal Scales Technical Manual
- 5 -
3.2 Load Cell Specifications
Model No
L6E
Rated Capacity (kg)
2.5/3/5/6/8/10/15/20/30/35/40/50
Sensitivity
2.0±0.2 mv/v
Excitation Voltage
5~12V
Material
Aluminum
Cable
0.3~3m Φ 4mm
Input Resistance
409Ω ±6Ω/1065Ω ±15Ω
Out put Resistance
350Ω ±3Ω/1000Ω ±10Ω
Temperature Range
-35°C ~ +65°C
Safe overload
150%F.S
Ultimate overload
300%F.S
Error
±0.0233%F.S
Creep (20min)
±0.020%F.S
Zero Balance
0±5%mV/V
Max. Platform Size
250x350mm

M301/M307 Series Personal Scales Technical Manual
- 6 -
4. INSTALLATION
Unpacking
Carefully take the balance out of its package, make it sure its not damaged and
all accessories are included.
Remove the weighing scale from the carton.
Remove the protective covering. Store the packaging and to use if you
need to transport the scale later.
Inspect the scale and terminal for damage.
Make sure all components are included
Accessories,
1. Balance
2. Adaptor
3. Product manual
Level Adjusting
Place the scale on a table.
Check the water mark. If, bubble is not centre
adjust the leveling feet until reach centre. Check
the level when you change the location.
Charging Battery
To charge the battery insert the adaptor pin to jack, jack is locating rear side
of the scale. Adaptor simply plug into the mains power. The scale no
needs to be turned on.
The battery should be charged for 12 hours for full capacity.
In the display there is an indicator show the status of battery charging.
When the scale is plugged into the mains power the internal battery will be
recharged. If the indicator off, the battery has a full charge. If it is on, the
battery is nearly discharged and if yellow, the battery is being charged.
Do not use any other type of power adaptor than the one supplied with the
scale.
Verify that the AC power socket outlet is properly protected.
Note: Please charge the battery before using the scale for the first time

M301/M307 Series Personal Scales Technical Manual
- 7 -
Installation
USB Connecter (selectable)
RS-232 Connecter (selectable)
Adaptor Jack
Calibration switch
Place the scale on a table.
Connect the adaptor pin in to the scale adaptor jack. Adaptor jack is
locating, rear side of the scale.
Adaptor connects into your AC power socket.
Pluggable equipment must be installed near
an easily accessible socket outlet with a
protective ground/ earth contact.
Display will show the version number and will
start self checking.
After self checking, display will be come to normal weighing mode.
Warm-up time of 15 minutes stabilizes the measured values after
switching on.
Calibrate with exact calibration weights, minimum 1/3 of the scale capacity
want to use for calibration. For calibration see details in parameter.
Then you can start your operation

M301/M307 Series Personal Scales Technical Manual
- 8 -
5. DESCRIPTION
Key Board
Turns the scale power On / Off
Set to hold mode
Set to BMI mode
Set pre-tare
Change unit: kg / lb
Sets display to Zero
Subtracts weight of container

M301/M307 Series Personal Scales Technical Manual
- 9 -
Display
DISPLAY
FUNCTION
STABLE
Indicator for Display stability
ZERO
Indicator for Zero display
TARE
Indicator for Tare display
Indicator for weighing capacity graph
NET
Indicator for Net weight
GROSS
Indicator for Gross weight
Cm/inch
Indicator for measuring units
Lb/kg
Indicator for weight units
Indicator for Charging status of battery
Voltage has dropped
Low Voltage
Fully Charged

M301/M307 Series Personal Scales Technical Manual
- 10 -
6. OPERATION
Initial Start-up
Warm-up time of 15 minutes stabilizes the measured values after switching on.
6.1 Power ON/OFF
Switch on the scale by pressing . The display is switched on and the
self test is started.
If you want to switch off press the key again.
6.2 Zero
Environmental conditions can lead to the balance exactly zero in spite
of the pan not taking any strain. However, you can set the display of
your balance to zero any time by pressing key and therefore
ensure that the weighing starts at zero.
6.3 Tare
You can tare the weight of any container by pressing key so that
with subsequent weighing the net weight of the object being weighed is
always displayed.
Load weight on the pan.
Press key. Zero is displayed, and tare is subtracted.
Remove weight from the platform. Tared weight is displayed. It can
set only one tare value. It can display with a minus value.
Press key. Zero is displayed, tare weight is cleared.
6.4 Change unit
In weighing condition, you can press to change the unit: kg / lb.
If you want to change the unit of height measurement, please set it in
parameter F5 stu. (page 13)

M301/M307 Series Personal Scales Technical Manual
- 11 -
6.5 Hold function
Press before load at the pan, so HOLD is active now. "Hold " and "---
--" appeared at the display.
After put load at the pan no indication until a stable non-zero weights is
detected. During this period "----" is indicated. (no indication of unstable
value).You will hear an acoustic beep, when stable weight (>20d)is detected.
It will show calculated HOLD-value with small "HOLD" in display.
After unloading the pan the value is indicated for 10 Seconds. After that
normal weight displaying is resumed.
Pressing , while the HOLD-function is active, will cancel the HOLD-
function.
In hold function, you can’t do ZERO and TARE operation.
6.6 Print function
Press key to print the weight value, you can disable this function (see the
parameter on Section 7)
6.7 BMI function
Press key on the weighing mode, display will show the last height “xxxxxx”,
use key to change digit, and press key to increase the value, press
key confirm it, display will enter into the BMI mode, “BMI”indicator will be
shown, people stand on the platform display will show the BMI value and the BMI
bar, Press key will turn back to weighing mode.
6.8 Precision*10
If you want to see more accurate weight value, press and hold for 2
seconds, display will show one more decimal place, the last digit will twink for 5
seconds, then it will go back to normal weighing value automatically.

M301/M307 Series Personal Scales Technical Manual
- 12 -
7. PARAMETERS
Enter the Menu
Press during self checking(9--0), display will show
Choose the Menu
Press , it can choose menu block or options one by one.
Enter the Selected Menu
Press ,it can confirm which will be shown displayed.
Enter in to TECH
Note: Before enter the tech menu, press calibration switch, which is
locating below the scale
When display showed Pi n , press and keys to enter the
function
Escape from the Menu
Press key, it can escape from the menu to weighing mode.
Parameter Block
Menu
Sub
Menu
Description
F1 off
0/3/5/15/30
To set the auto power-off time.
Unit is minutes.
If you select 0,it will not auto power-off.
F 2 swt
off
Disable print function.
prt
Enable print function.
F1 off

M301/M307 Series Personal Scales Technical Manual
- 13 -
F3 prt
Seire
Also send data continuous
P prt
By pressing Print key , weighing value will be
added to the memory and print the print out
P cont
Send data continuous
P auto
Automatic accumulation.
Individual weighing values are automatically
added
ask
ASK mode
Command R: read data
Command T: Tare
Command Z: Zero
P cnt2
Send data another continuous mode.
P stab
Send data when the weighing values is
stable
F4 bk
Bl on
Set the backlight always on.
Bl off
Set the backlight always off.
Bl au
Set the backlight automatically on.
F5 stu
cm
Select unit cm
inch
Select unit inch
F6 unit
Kg on/off
Enable/ disable unit kg
Lb on/off
Enable/ disable unit lb
tch
pin
Enter the password
P 1 spd
Set A/D convert speed(7.5/15/30/60)
P 2 Cal
desc
To set decimal points.
Options: 0,0.0, 0.00, 0.000, 0.0000
inc
To set increment
Options: 1, 2, 5, 10, 20, 50 (kg)
Options: 2, 5, 10, 20, 50, 100 (lb)
cap
Set capacity
cal
Enter into calibration
P 3 pro
tri
Deprecated function
count
To show the scale internal count
reset
Reset the scale
setgra
Set the gravity value

M301/M307 Series Personal Scales Technical Manual
- 14 -
8. CALIBRATION
Calibration Settings in the Parameter;
Turn on the scale
Press key during self checking, display will show
Press key until to display
Press key to confirm display will show
Press and keys, display will show
Press key to show display
Press key to enter calibration,
Display will show
Press key until display show
Press key into calibration, display will show
When scale get stable, Press key,
Display will be show last calibration weight,
If it’s required, change calibration weight value by using and
keys
Press key to confirm the value
Display will be show
Place the test weight on the platform.
After stable, press key confirm
Display will be show
Then will start self-test, unload test weight during the self test.
Scale will come to normal display
Note: the unit (kg / lb) is the same as the last displayed one.
That is: before you restart the scale to do calibration, if you see the unit is kg, then
in calibration, the unit is kg; if you want to change to lb, you need to press U key to
change the unit before you restart it.
F1 off
tch
pin
P1 spd
P2 cal
Cal
unLoad
pass
desc
00100.0
Load

M301/M307 Series Personal Scales Technical Manual
- 15 -
Note: During the calibration end, when display shows pass and start self test, test
weights should be want to unload before showing normal display for to avoid Err 19.
Normal Calibration
Turn on the scale
During the self-test, press key
Keep empty platform
When scale get stable, Press key,
Display will be show last calibration weight,
If it’s required, change calibration weight value by using and
keys
Press key to confirm the value
Display will be show
Place the test weight on the platform.
After stable, press key confirm
Display will be show
Then will start self-test, unload test weight during the self test.
Scale will come to normal display
unLoad
pass
00100.0
Load

M301/M307 Series Personal Scales Technical Manual
- 16 -
9. PRINT FORMAT
PRT
Print format
0
2012/08/09 11：00
60.0 kg
1
2012/08/09 11：00
60.0 kg
170.0cm
20.7BMI
2
60.0 kg
3
60.0 kg
170.0cm
20.7BMI
Note: TPUP can’t print out the date and time.

M301/M307 Series Personal Scales Technical Manual
- 17 -
10. BATTERY OPERATION
The Medical Scales can be operated from the battery if desired. The battery life
is 16 hours (backlight) and 22 hours (without backlight).
When the battery needs charging a symbol on the weight display will turn on. The
battery should be charged when the symbol is on. The scale will still operate for
about several minutes after which it will automatically switch off to protect the
battery.
To charge the battery simply plug into the mains power. The scale does not need
to be turned on.
The battery should be charged for 12 hours for full capacity.
Just under the quantity display is an LED to indicate the status of battery
charging. When the scale is plugged into the mains power the internal battery
will be charged. If the LED is green the battery has a full charge. If it is Red the
battery is nearly discharged and yellow indicates the battery is being charged.
As the battery is used it may fail to hold a full charge. If the battery life becomes
unacceptable then contact your distributor.
Note: useless battery should be recycled, not throw away as household refuse.

M301/M307 Series Personal Scales Technical Manual
- 18 -
11. MAINTENENCE
WARNING
DISCONNECT ALL POWER TO THIS UNIT
BEFORE INSTALLING, CLEANING, OR
SERVICING. FAILURE TO DO SO COULD
RESULT IN BODILY HARM OR DAMAGE THE
UNIT.
CAUTION
Permit only qualified persons to service the instrument
Before connecting or disconnecting any components, remove the
power.
Failure to observe these precautions bodily harm or damage to or
destruction of the equipment.
10.1. General
If the scale does not operate properly, find out the problem as possible.
Determine whether the problem is constant or alternate. Be aware that problems
can be caused by mechanical or electrical influences.
Check the following.
Water
Corrosive materials
Vibrations or temperature or wind
Physical damage
Check the scale cables for damage, and check all connections and connecters
for any loose contact or incorrect connection

M301/M307 Series Personal Scales Technical Manual
- 19 -
Cleaning
Disconnect the power before cleaning.
Use a cloth with mild suds and light cleaning agents.
Make sure that fluid not able to get into the device.
Use a clean and soft cloth for rub off.
10.2. Error Codes
Error Code
Description
POSSIBLE CAUSES
Err 4
Exceed manual zero range
(pressing )
Goods on the platform
Overload, when
zeroing the scale.
Improper calibration
Load cell problem
PCB problem
Err 6
A/D Count out of the range
Platform not installed
Load cell problem
PCB problem
Err 19
Exceed Auto Zero range
When switch on the scale
Goods on the platform
Improper calibration
Load cell problem
PCB problem
10.3. Determine the Problem
Determine whether the problem is in the PCB or the Load Cell
Remove power from the system, and disconnect the load cell connection
from the PCB
Connect the PCB to a load cell simulator
Reapply power and test the PCB
If problem goes away, its source is probably in the Load cell. Check the
wiring, connecter, load cell and mechanical components of the load cell.
If problem persists, its source is probably in the PCB. Check the PCB voltages,
connecters, cables and function programs