Adam Equipment MDW - 250L User manual

© Adam Equipment Company 2009
Adam Equipment
MDW – 250L
DIGITAL PHYSICIAN SCALE
Software EMW-250L-20080601
ADAM EQUIPMENT CO. LTD.
p.n. 4302, Rev. C4, November 2009

© Adam Equipment Company 2009 Page 1 Rev C3, June 2008

© Adam Equipment Company 2009 Page 2 Rev C3, June 2008
CONTENTS
1.0 INTRODUCTION ..........................................................................................4
2.0 TECHNICAL SPECIFICATIONS...................................................................4
3.0 DISPLAY AND KEY DESCRIPTIONS ..........................................................5
4.0 SETTING UP THE SCALE............................................................................6
5.0 FUNCTION ...................................................................................................5
5.1 WEIGHING................................................................................................5
5.2 MEASURING HEIGHT..............................................................................6
6.0 CALIBRATION ..............................................................................................6
7.0 USER PARAMETERS ..................................................................................8
8.0 RS232 COMMUNICATIONS.........................................................................9
9.0 ERROR MESSAGES..................................................................................13
10.0 WARNING...................................................................................................13

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1.0 INTRODUCTION
•The MDW 250L scale is a Digital Physician Scale.
•It is an accurate electronic device with advanced design and stable
performance.
•It is designed to measure both the weight and the height of a person.
2.0 TECHNICAL SPECIFICATIONS
Maximum capacity 250 kg / 550lb
Minimum capacity 2 kg / 4lb
Scale division 0.1Kg / 0.2lb
Height range 80 cm-210 cm
Division of measurement 0.5 cm
Display LED display
Size of platform 375 X 275 mm
Overall dimension 535 X 275 X 1040 mm
Deadweight 13 kg
Environment for Use Temperature: 5ºC-40ºC;
Humidity: <85℅RH
Power 12vAC 500mA adapter
Battery Internal, re-chargeable
6V 4Ah, 5 hours approx.
Calibration External calibration through the keypad.
Communications Bi-directional RS232

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3.0 DISPLAY AND KEY DESCRIPTIONS
KEYS FUNCTIONS
[On / Off
/Zero]
To turn the scale on or off.
To zero the scale if the display drifts from zero.
[Tare] To tare the scale, if necessary.
[Units] To toggle the weighing unit between Kg and Lb.
[Print /
Hold]
To lock the reading even if the person to be weighed is moving and
also to print the weight details out.
DISPLAY DESCRIPTIONS
Kg Indicates when the scale is weighing in Kilograms.
Lb Indicates when the scale is weighing in Pounds.
Hold Indicates when the scale has held the weight reading shown on the
display. It will flash until it locks into the stable reading when it will
then remain on constantly when it has held the displayed reading.
When the battery is low, this symbol will be light up. Connect the
adapter to recharge the battery.
CH The charge light will be on when the battery is recharging.
AC This indicates when the scale is being used with the AC adapter.
ZERO This indicator will be displayed in the left corner when the scale
reaches zero.
NET The Net weight is displayed, Tare weight is at zero.

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4.0 SETTING UP THE SCALE
•Take the Physician scale out of the box.
•Unwind the load cell cable (number 2 on the diagram).
•Run the cable up through the pillar from the base of the scale.
•Use the 4 screws (number 3 on the diagram) to mount the pillar to the
indicator.
•Connector the plug and socket (number 6 and 7 on the diagram) and
insert the pole into the pole holder.
•Secure the pole to the pole holder by inserting the 2 screws (number 9
on the diagram).
•Secure the height rod into the height rod holder (number 4 and 8 on the
diagram).
8
height rod
holder
4
height rod
2
cable to
indicator
1
indicator
10
platform
5
pole
9
screw
3
screw
7
socket
6
plug

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5.0 FUNCTION
5.1 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.
•Press the [On/Off] key and the machine switches off.
•The person to be weighed can step on to the platform once the scale
shows 0.0 on the display. 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 press the tare key to remove the
weight value from the display.
•Press the [Units] key for changing the weighing unit to kg or lb. The
LED will indicate the chosen weighing 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 [Print/Hold]
key. The LED will flash until a stable reading has been obtained and
then it will light up constantly. To release the function, press the
[Print/Hold] key again.
•Print Function: To send the weighing result to a printer or computer
press the [Print/Hold] key when the [Print/Hold] key has been set up
in the parameter section to work as print function.
(Print function is only applied for scale with RS232 interface)

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5.2 MEASURING HEIGHT
•While measuring the height, it is necessary to pull up the measuring
board at a right angle with the inside tube.
•When the tube is pulled out straight, it is sufficient to measure the
height form 80-136cm. The number can be obtained upon the conjoint
place where the upper part of middle tube screw meets with the inside
tube scale.
•Further, if the middle tube is pulled out straight, it is possible to
measure the height from 136-210cm. The reading can be obtained at
the conjoint place where the upper part of outside tube screw meets
with the middle tube scale.
6.0 CALIBRATION
Before calibrating the scale, you should ensure that you have a known weight for
calibration.
1. When in normal weighing mode with the scale at zero press and hold down
[TARE] and [ON / OFF] keys to enter the calibration mode.
2. If the calibration switch is in the off position on the main PCB inside the scale, the
indicator will show ‘CAL.OFF” and then exit this mode. If the indicator shows”
CAL-?”, the scale is ready for calibration, showing the calibration switch is in the
on position. If the calibration switch is in the Off position open up the indicator
and move the switch to the On position. See diagram on page 8.
3. When the indicator shows ” CAL-?”, press the [TARE] key to confirm and go to
next step, or press the [ON / OFF] key to exit the calibration mode.
4. When ‘0.0’ is displayed the scale will begin to calibrate the scale’s zero-point.
Ensure that there is no load or weight on the scale’s platform . Press the [TARE]
key to confirm, or press the [ON / OFF] key to exit this mode.
5. A few seconds after the [TARE] key has been pressed in step 4 the scale will

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show ‘250.0kg’ or ’500.0lb’ depending on which unit you chosen, this is the
default calibration weight from the factory. Press the [UNIT] key to select the
calibration weight unit that you want to calibrate in. Press the [ON / OFF] key to
exit the calibration mode at this point or press the [Print/Hold] key to choose a
different calibration weight value (50kg, 100kg, 150kg, 200kg, 250kg or 100lb,
200lb, 300lb, 400lb, 500lb); Then put on the weight that you selected and press
the [TARE] key to confirm the chosen standard weight that was selected earlier.
The displayed data will flash on the display and if the scale accepts the
calibration data it will calculate and store the information into the EEPROM. If an
error has occurred, the scale will display “CAL. Er” and return back to step 4 for
re-calibration. If the loaded weight is not within the range of 95% to 105% of the
weight value you selected, the scale will not calibrate but display “CAL. Er” and
return back to step 4 for re-calibration. )
6. Check the calibration by putting the weight that you calibrated at back on the
scale, if it is off repeat the calibration process again.

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7.0 User Parameters
This indicator has 4 parameter settings that can be selected.
1. When the scale is in normal weighing mode, press and hold down the [ON / OFF]
key and the [UNIT] key for 3 seconds until ‘SEtUP’ is shown on the display.
2. When in the SETUP mode, press the [Print/Hold] key to change the flashing
digits, and [TARE] key to confirm the flashing digits and move to the next
parameter setting. Press the [ON / OFF] key to exit the set up mode.
3. Parameters setting summary:
Parameter x/xy Factory Set
Setting
A.o.t. 00-15 05
Auto-off time:
No auto-off = 00.
01-15 minutes auto-off time.
P.H. 0,1,2 1
0 = Only Print Function
1 = Only Hold Function
2 = both HOLD and PRINT function (pressed
down less 3s,this key works as Print
function; pressed down more than 3s,this
key works as HOLD function)
H.t 0-4 0
Hold work time:
0 = no time limit.
1 = 10 seconds
2 = 30 seconds
3 = 60 seconds
4 = 120 seconds
S.F. 0-3 0
0 = No RS232 Function.
1 = Continuously outputs display data.
2 = Output display data when PRINT pressed
3 = Bi-directional communication (the scale
receives and executes commands from the
HOST device)

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8.0 RS232 Communications
(Only applied for scale with RS232 interface)
The Interface parameters are: Connection details are:
8.1RS-232 connection between the Scale and the Host:
Scale -----------------------Cable---------------------------Host
(DB9 female)--------(DB9 male)----(DB9 female)--------(DB9 male)
TXD 2 2 2 2 RXD
RXD 3 3 3 3 TXD
GND 5 5 5 5 GND
NC 1 1 1 1
NC 4 4 4 4
NC 6 6 6 6
NC 7 7 7 7
NC 8 8 8 8
NC 9 9 9 9
Note: The indicator pin1,4,6,7,8 and 9 are not connected.
The RS232 function will only operate if PH has been set to 0 or 2.
8.2 When Parameter S.F. in section 7 is set to 0 :
No RS232 function. It will not transmit or receive any data although the scale is
equipped with RS232. The RS232 function can be only activated when scale is in
normal weighing mode.
RS-232 output of weighing data
ASCII code
9600 Baud rate (fixed)
1 start bit, 8 data bits,1 stop bit
No Parity
Connector: 9 pin d-subminiature socket
Pin 3 Output
Pin 2 Input
Pin 5 Signal Ground

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8.3 When Parameter S.F. in section 7 is set to 1 :
Continuous output of the current displayed reading and unit, and it does not receive
any data. The output format is as below:
<LF>< reading, minus, decimal point, weight unit>GR<CR><EXT>
Or <LF>< reading, minus, decimal point, weight unit>NT<CR><EXT>
8.4 When Parameter S.F. in section 7 is set to 2 :
Manually outputs display data when PRINT is pressed. The output format is as
below:
<LF>< reading, minus, decimal point, weight unit>GR<CR><EXT>
Or <LF>< reading, minus, decimal point, weight unit>NT<CR><EXT>
8.5 When Parameter S.F. in section 7 is set to 3 :
The baud rate and data format are fixed with responses to serial commands being
within 300 milliseconds. One second should be adequate for use as a time-out
value by remote (controlling) device.
8.5.1 The length of the weight field will be 7 digit weight data, one for minus sign,
one for decimal point, two for measure unit (e.g. “lb”, “kg”). Units of measure
abbreviations are always lower case.
If the weight is overcapacity, the scale will return nine ‘^’ characters (the field of
minus sign, decimal point, weight data is filled by ‘^’).
If the weight is under capacity, it will return nine ‘-’ characters (the field of minus
sign, decimal point, and weight data is filled by ‘_’).
If the zero point has an error, it will return nine ‘-’ characters.
The character will be ‘-’ for negative weight or a space character for positive
weight. Minus sign follows after the first digit.
Useless leading zero before digits are suppressed.
8.5.2 Key to symbols used
<LF> Line Feed character (hex 0AH)
<CR> Carriage Return character (hex 0DH)
<ETX> End of Text character (hex 03)
<SP> Space (hex 20H)
H1H2H3 Three status bytes. Refer to Table1 for definition.

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<p> Polarity character including minus sign for negative weight and a space
character for positive weight
W1-W7 weight data
<dp> decimal point
U1U2: measure units, kg, lb
8.5.3 Commands and response
(1) Command: W<CR> (57h 0dh)
Response:
①<LF>^^^^^^u1u2<CR><LF>H1H2H3<CR><ETX>---over capacity
①<LF>______u1u2<CR><LF> H1H2H3 <CR><ETX>---under capacity
①<LF>---------u1u2<CR><LF> H1H2H3<CR><ETX>---zero-point error
①< L F > <p > w 1 w2 w 3 w 4 w5 w 6 < d p >w 7 u 1u 2 < C R > <L F > H 1H 2 H 3 < C R>
<ETX> ---Scale is stable, and the current weight unit is kg or lb. With or
without decimal point and the position is as per the P9 setting and current
unit.
(2) Command: S<CR> (53h 0dh)
Response: <LF> H1H2H3<CR><ETX>
(3) Command: Z<CR> (5ah 0dh)
Response: Zero function is activated and it returns to current scale status. just
like pressing ZERO/ON/OFF button:
<LF> H1H2H3<CR><ETX>
If ZERO function cannot be activated, it will return to current scale status.
(4) Command: T<CR> (54h 0dh)
Response: TARE function is activated, and then returns scale status. just like
pressing TARE button:
<LF> H1H2H3<CR><ETX>
If TARE function cannot be activated, it will return to current scale status.
(5) Command: U<CR> (55h 0dh)
Response: Changes units of measure and return scale status with new units,
just like pressing UNIT button. The new measure unit should be
allowed to use as per P11 setting.
<LF>u1u2<CR><LF> H1H2H3<CR><ETX>
(6) Command: X<CR> (58h 0dh)
Response: power off the scale, just like press down the ON/OFF key to turn off
the scale.
(7) Command: all others
Response: Unrecognized command
<LF>?<CR><ETX>

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Table1: The status bits definition:
Bit Byte 1 (H 1 ) Byte 2 (H 2 ) Byte 3 (H 3 )
0=stable
0= not under
capacity
0
1= not stable 1= under capacity
0= not at zero
point
0= not over
capacity
1
1= at zero point
1= over capacity
01=normal work
mode
10= hold work
mode
00=not define
11= not define
0= gross weight
2 always 0 always 0 1= net weight
0= eeprom OK
3 1= eeprom
error
always 0 always 0
4 always 1 always 1 always 1
5 always 1 always 1 always 1
6 always 0 always 1 always 0
7 parity Parity parity

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9.0 Error Messages
1. 0¯¯¯¯¯zero point is over the setting range
2. 0_ _ _ _ _ zero is below the setting range
3. Ad¯¯¯¯ ADC is over max. range;
4. Ad _ _ _ _ ADC is below min. range;
5. EEP.Er there is an error in EEPROM
6. CAL.Er there is an error in calibration
7. CAP.-- The capacity will be displayed
8. Lo.bAt The voltage of batteries or input power is below 5.6V.
9. FULL The capacity has been exceeded by the person
standing on the scale.
10.0 WARNING
•Do not dismantle the weighing machine without following the necessary
instructions.
•Do not jump while standing on the platform. This may damage the sensor
inside.
•Do not move the weighing machine violently and abruptly. It is
recommended to move and put down the weighing machine 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 weighing machine 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.
•When lifting the height meter, it is suggested to pull it straight along the
pipe without using excessive force.

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Manufacturer’s Declaration of Conformity
This product has been manufactured in accordance with the harmonised European standards,
following the provisions of the below stated directives:
Electro Magnetic Compatibility Directive 2004/108/EC
Low Voltage Directive 2006/95/EC
Adam Equipment Co. Ltd.
Bond Avenue, Denbigh East
Milton Keynes, MK1 1SW
United Kingdom
FCC COMPLIANCE
This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a commercial environment. The
equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interference in which case
the user will be required to correct the interference at his own expense.
Shielded interconnect cables must be employed with this equipment to insure compliance with the
pertinent RF emission limits governing this device.
Changes or modifications not expressly approved by Adam Equipment could void the user's
authority to operate the equipment.
WEEE COMPLIANCE
Any Electrical or Electronic Equipment (EEE) component or assembly of parts intended to be
incorporated into EEE devices as defined by European Directive 2002/95/EEC must be recycled or
disposed using techniques that do not introduce hazardous substances harmful to our health or the
environment as listed in Directive 2002/95/EC or amending legislation. Battery disposal in Landfill
Sites is more regulated since July 2002 by regulation 9 of the Landfill (England and Wales)
Regulations 2002 and Hazardous Waste Regulations 2005. Battery recycling has become topical
and the Waste Electrical and Electronic Equipment (WEEE) Regulations are set to impose targets
for recycling.

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ADAM EQUIPMENT is an ISO 9001:2000 certified global company with more than
35 years experience in the production and sale of electronic weighing equipment.
Adam products are predominantly designed for the Laboratory, Educational, Medical,
retail and Industrial Segments. The product range can be described as follows:
-Analytical and Precision Balances
-Compact and Portable Balances
-High Capacity Balances
-Moisture analysers / balances
-Mechanical Scales
-Counting Scales
-Digital Weighing/Check-weighing Scales
-High performance Platform Scales
-Crane scales
-Medical Scales
-Retail Scales for Price computing
For a complete listing of all Adam products visit our website at
www.adamequipment.com
© Copyright by Adam Equipment Co. Ltd. All rights reserved. No part of this
publication may be reprinted or translated in any form or by any means without the
prior permission of Adam Equipment.
Adam Equipment reserves the right to make changes to the technology, features,
specifications and design of the equipment without notice.
All information contained within this publication is to the best of our knowledge timely,
complete and accurate when issued. However, we are not responsible for
misinterpretations which may result from the reading of this material.
The latest version of this publication can be found on our Website.
www.adamequipment.com