Totalcomp M301, M307 Technical Manual

M301/M307

Personal Scales

Weighing Indicator

REV: C1, November, 2014

(v3.09-3.014A)

M301/M307 Series Personal Scales Technical Manual

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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

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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.

1. PRECAUTIONS

 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.

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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)

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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'')

3. SPECIFICATION

3.1 Specifications

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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

3.2 Load Cell Specifications

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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

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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

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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

5. DESCRIPTION

Key Board

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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

Display

M301/M307 Series Personal Scales Technical Manual

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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)

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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.

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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

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

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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

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F1 off

tch

pin

P1 spd

P2 cal

Cal

unLoad

pass

desc

00100.0

Load

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.

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unLoad

pass

00100.0

Load

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

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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

9. PRINT FORMAT

Note: TPUP can’t print out the date and time.

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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

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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.

11. MAINTENENCE

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

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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

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

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

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Measuring Points

Resistance

Red (+ Exc) to White ( –Exc)

420 ±20Ω

Green (+Sig) to Black ( –Sig)

350Ω ±5Ω

10.4. Check the Load cell

 Remove power from the system, and disconnect the PCB from the Load

cell

 Check the moisture, or foreign material inside.
 Make sure all leads are connected and correctly.
 Check load cell for proper input and output resistances

Load Cell Connections

Signal + Green
Supply + Red

Signal - Black

Supply - White
Shield

10.5. Check PCB Voltages

If the problem is in the PCB, use a multimeter to check the following voltages

10.5.1 AC Power

Check the AC power socket out put voltage.

 Voltage must be a -20% and +10% of the normal AC voltage.

10.5.2 Adaptor Voltage

Check the adaptor output cable connecter voltage

 Voltage must be minimum 9VDC and maximum 15VDC

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Problems

Possible cause

Common Solutions

Display is blank.
No self test

Mains power is turned
off. Power supply faulty
or not plugged. Internal
battery is not charged.
On/Off switch problem

Check power is getting inside the
scale and on/off switch is working.
Verify the voltages, which is on the
power labels.

Blank display
after self test

Pan not installed.
Unstable weight, load
cell damaged

Check the pans are installed
correctly. Try to turning on again.

OL or -------

Maximum capacity
exceeded. Load cell or
mechanics damaged.
Power supply faulty

Check the platform is installed
correctly. Try to turn on the scale
again. Do the calibration again

------- or NULL
displayed

Weight is on the
platform is below
permissible limit. Pan
not installed correctly.
Power supply faulty.
Load cell or
mechanism faulty

Check the platform is installed
correctly. Try to turn on the scale
again.
Do the calibration again

10.5.3 PCB Input Voltage

Check the PCB input power connecter voltage

 Voltage must be minimum 9VDC in to the pin AD+

10.5.4 Check Battery Voltage and Charging Voltage

1. Check the Battery Voltage,

 Voltage must be minimum 6VDC. If below the 6VDC connect the adaptor

for charging

 The battery voltage below the 5.5VDC, replace the battery and install new

6V/3.4Ah battery.

2. Check the Battery Charging Voltage;

 Remove the battery connection terminals (Red and Black) from the battery.
 Connect the power and turn on the scale
 Voltage into the terminal minimum 6.5VDC

10.6 Trouble Shooting

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Display is
unstable

Goods touching
somewhere. Air
variation or any
vibrations.
Temperature
changed . Load cell or
connections faulty.
Power supply faulty

Check the scale is in acceptable
location.
Check the connecters and load cell.
Check the power supply and battery

Weight value
incorrect

Calibration error.
Platform of load cell
touching somewhere.
Wrong weighing unit

Use accurate weight for to do the
calibration
Check the pan and load cell is
installed proper and touching.
Check the parameter settings.
Check the load cell and connecters

Can not use full
capacity

Over load protection
stoppers or transport
locks are not removed.
Parameters are set
incorrectly.
AD problem.
Load cell or
mechanism damaged

Check the stoppers and locks under
the platform.
Check the weighing unit and
parameter settings.
Check the load cell.

Platform Corner
Weight different

Over load protection
stoppers or transport
locks are not removed.
Load cell or
mechanism damaged

Check the stoppers and locks under
the platform.
Use accurate weight for to do the
calibration
Check the load cell.

Battery not
charging

Mains voltage problem
Charging circuit
problem
Battery Problem

Check the mains and adaptor.
Check the battery.
Check the charging circuit

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12. DISPOSAL

Disposing of the device

Do not dispose of the device in domestic waste. The device must be disposed of
properly as electronic waste. Follow the national regulations which apply in your
case. For further information, contact our service department at:
[email protected]

Batteries

Do not throw used batteries away in domestic waste.
col

lection points in the

harmful substances and containing no mercury

vicinity.

When buying new

Dispose

batteries,

(Hg),

cadmium

of

batteries

select those low in

(Cd)

or lead (Pb).

at

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13. WARRANTY

A two-year warranty from date of delivery
ma

terials
rechargeable
be made good for the customer at no charge on production of the receipt. No
further claims can be entertained. The costs of transport in both directions will
be borne by the customer should the
the customer’s premises. In the event of transport damage, claims under
warranty can be honoured only if the complete original
any transport
when

A claim under warranty will not be honoured if the equipment is opened by
persons not
customers abroad to contact their local
matter.

or

workmanship. All moveable

and the scale secured and attached in that packaging just as it was

originally

expressly authoried

batteries

packed. All the packaging should therefore be retained.

etc. are

excluded.

by T-scale to do so. We would ask our

applies

parts

Defects which come under warranty will

equipment

sales

to defects

batteries,

be located

agent in the event of a

attributable

cables,

anywhere

packaging

mains

to poor

units,

other than

was used for

warranty