Adam Equipment MCW-250 L User manual

Adam Equipment

Service Manual

Adam Equipment Co. Ltd.

p.n. 8090, Rev. A1, June 2006

MCW-250 L

CONTENTS

1.0 INTRODUCTION .............................................................................................2

2.0 KEYS AND DISPLAY DESCRIPTION .............................................................2

3.0 TROUBLESHOOTING THE MCW-250L..........................................................3

4.0 TECHNICAL SPECIFICATIONS......................................................................4

5.0 SETTING UP THE SCALE...............................................................................4

6.0 WEIGHING ......................................................................................................5

7.0 USER CALIBRATION ......................................................................................6

8.0 WARNING........................................................................................................8

9.0 ADJUSTMENT AND REPAIRS........................................................................9

9.1 ADJUSTMENT .............................................................................................9

9.2 REPAIRS......................................................................................................9

9.2.1 ELECTRONICS REPAIR ..........................................................................9

9.2.2 MECHANICAL REPAIR ............................................................................9

10.0 DIAGRAMS....................................................................................................11

1.0

INTRODUCTION

The MCW 250L scale is a Digital Physician Chair Scale which allows the patients to

be weighed while seated. It is an accurate electronic device with advanced design

and stable performance.

2.0 KEYS AND DISPLAY DESCRIPTION

KEYS FUNCTIONS

[Tare/Zero

On/Off]

To turn the scale on or off.

To zero the scale if the display drifts from zero.

To tare the scale, if necessary.

[Hold] To lock the reading even if the person to be weighed is moving.

[Kg/ lb] To toggle the weighing unit between Kg. and lb

DISPLAY DESCRIPTIONS

ZERO This indicator will be displayed in the left corner when the scale

reaches zero.

The arrow indicator will point at Kg, lb, Hold or/and Tare marked near

the LCD panel, as on when they are chosen.

When the battery is low, this symbol will be displayed in the left of the

display. Connect the adapter to recharge the battery.

The charge light will be on when the battery is recharging.

Full

FullFull

Full

When the load on the platform is over the maximum capacity, it will

appear on the display.

3.0 TROUBLESHOOTING THE MCW-250L

PROBLEMS SUGGESTIONS

Nothing happens when

[On/off] is pressed

Press the switch situated on side

of the indicator to ON, for battery

operation

Display turns ON but then

goes off

Charge the battery

Display shows “

FULL

”

and

does not change when the

person to be weighed

stands on the platform

Check whether the cable from the

base is properly plugged into the

socket on the indicator

Check whether the cable is

damaged

The scale does not weigh

accurately

Calibrate the scale

Check the kg/lb selection before

weighing

Charge the battery

Check the cable

The person on the scale should

not move

Check nothing is rubbing against

the platform

Check the base assembly is not

damaged

Replace the PCB

Display does not change

Check HOLD is not activated

4.0 TECHNICAL SPECIFICATIONS

Model MCW-250L

Maximum Capacity 250 kg / 550 lb.

Readability 0.1 kg / 0.2 lb.

Repeatability 0.2 kg / 0.4 lb.

Linearity 0.2 kg / 0.4 lb.

Units of measure kg, lb

Display LCD with 29mm/ 1.1” digits

Overall dimension

(w x d x h)

650 x 880 x 970 mm /

25.6” x 34.6” x 38.2”

Environment for use Temperature: 5ºC to 40ºC,

41ºF to 104º F

Humidity :<85% RH

Power Through AC Adapter

Battery Internal re-chargeable

Gross weight 37.8 kg/ 83.3 lb.

Net weight 27.1 kg/ 59.7 lb.

5.0 SETTING UP THE SCALE

The MCW-250L comes with a chair fitted on the scale platform. There is no

assembly necessary, attach the indicator to the bracket, simply plug in the power

supply and it is ready for use.

The indicator could be removed from the chair for mounting to the wall or used on a

table top. Brackets are available for wall mounting the indicator.

POWER SUPPLY

The scale uses an internal re-chargeable battery. If the external power supply is to

be used, plug it into the jack on the indicator.

When the battery is low, a low battery symbol will be displayed in the left of the

display. Connect the adapter to recharge the battery.

6.0 WEIGHING

•Place the Physician Scale on an even floor and press the [On/Off] key.

•The instrument performs a self-test after which it is ready for operation.

The display will show “

SCALE

”, “

250.00

” (Capacity), “

Ur x.xx

” (the

software revision number), “

10.0.0.0.0

”, “

DC. 6.00

” (the voltage of the

battery) and then will show “

0.0000

” with an arrow symbol, indicating

the last chosen unit (kg or lb).

•Press the [On/Off] key for 2 or 3 seconds and the machine switches

off. If the machine is not to be used for a long time, the main power

switch shall be turned off.

•The scale has a back-light which is switched on every time the scale is

turned on or the [On/Off] key is pressed during the operation.

•When in the weighing mode, press [On/Off], the scale will show

“

0.000

” when the initial zero is within 4℅of the maximum capacity.

•The person to be weighed can step on to the platform now. The weight

will be display in Kg. or lb. depending on the units chosen by the user.

•If the weighing value is to be tared to obtain the net value, press the

[On/Off] key again.

•Press the [kg/lb] key for changing the weighing unit to kg or lb. An

arrow will indicate towards the chosen unit.

•Overload display: When “

FULL

” appears on the display, it shows that

the load on the platform is over the maximum capacity. Under these

circumstances, it is necessary to reduce the load otherwise the sensor

or the platform will be damaged.

•Hold Function: To lock the weighing result, press the [Hold] key. The

arrow indicator will point towards HOLD and it will the show a steady

reading even if the person on the platform is moving or goes away from

the scale and will not affect the next weighing. To release the function,

press the [Hold] key again.

•Do not press the [On/Off] key if you do not want to weigh as pressing

the [On/Off] key will switch the scale to ON.

7.0 USER CALIBRATION

1. Press [On/Off] key when the display shows ”

SCALE

”.

2. Press [On/Off] key again.

If the display is not showing “

Id01

” open the upper housing and switch the

span jumper on PCB to ON.

Start again by pressing [On/off].

The display shows “

Id01

”, “

Id-02

”, “

Id05

”, “

Id10

”,”

Id-20

”, “

Id-50

”.

3. Select “

Id01

” for 100g increments and press the [On/Off] key once.

4. The indicator will show the selection capacity: “

P1000

” “

P2000

”….”

P5000

”,

Select “

P2500

” for 250kg, then press the [On/Off] key once.

5. Indicator will automatically show the decimal points: “

POT 0

” “

PT0.0

” “

T0.00

”

“

T0.000

”, “

POT 0

”. Select the “

PT0.0

” and press the [On/Off] key again.

6. Indicator will display “

ULOAD

”. Press the [On/Off] key again.

7. Indicator will show the internal value. After it is stable, it will show “

LOAd

”.

8. Put the mass (suggest the full capacity) and press the [On/Off] key, the

indicator shows the internal value (after loading) and the will show “

Ld-In

” after

stable.

9. Press the [On/Off] key. Then press the [Hold] key. The last digit of the

display will be moving from “

0-9

”. Press the [Hold] key, the digit will move

forward to one position. When the figure displayed is same as the capacity of

the standard weight, press the [On/Off] key.

For example: If a 10 kg weight is used instead of full capacity:

After you process till the step (9) as above, press the [On/Off] key.

The indicator will show: “

0.0

”. Press the [Hold] key, the last digit will be

automatically jumped from “

” to”

”. When the figure jumps to “

”, press the

[Hold] key three times. Now, the “

” will be moved to the 3

forward position

and the display will be changed to “

10.0

”. At this time you are required to

press the [On/Off] key immediately.

Next the display will show the current weight on the pan.

10.The Calibration is now complete.

11.Set the span jumper on the PCB to OFF position and re-seal the indicator.

12.If the selections made during calibration are not as described as above, the

scale may still work but will not show accurate results. In such cases, re-do

the calibration as shown above.

8.0 WARNING

•Do not dismantle the chair-weigher without following the necessary

instructions.

•Do not jump while standing on the load-bearing board. This may damage

the sensor inside.

•Do not move the chair-weigher violently and abruptly. It is recommended

to move and put down the chair-weigher gently.

•It is suggested to wipe the stains with soft cloth soaked with detergent and

to wipe later with soft cloth too. Do not use organic solutions and boiled

water to wipe the stains. Do not use water for cleaning.

•Keep the chair-weigher in a dry and clean environment. Do not expose it

outdoor or use it in locations near fire, under direct sunshine or with high

temperature.

•The [On/Off] key on the screen board only switches off the screen power

instead of the entire power to the chair-weigher. Therefore, it is necessary

to switch off the main power supply when the chair-weigher is not in use

for a long time. Otherwise the battery may be damaged as a result of

over-discharge of electricity.

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