MDW – 300L - Adam Equipment
Adam Equipment
MDW – 300L
p.n. 700660159 Rev. A, April 2011
© Adam Equipment Company 2011
© Adam Equipment Company 2011
INTRODUCTION .......................................................................................... 3
TECHNICAL SPECIFICATIONS .................................................................. 3
DISPLAY AND KEY DESCRIPTIONS.......................................................... 4
SETTING UP THE SCALE ........................................................................... 5
FUNCTION ................................................................................................... 7
WEIGHING ............................................................................................... 7
MEASURING HEIGHT.............................................................................. 8
MEASURING BODY MASS INDEX (BMI) ................................................ 8
CALIBRATION.............................................................................................. 9
USER PARAMETERS ................................................................................ 10
RS232 COMMUNICATIONS ...................................................................... 11
ERROR MESSAGES ................................................................................. 15
WARNING .................................................................................................. 15
© Adam Equipment Company 2011
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© Adam Equipment Company 2011
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The MDW 300L scale is a Digital Physician Scale with Body Mass
Index (BMI) readout.
It is an accurate electronic device with advanced design and stable
It is designed to measure both the weight and the height of a person
and compute the BMI index.
Maximum capacity
Minimum capacity
Scale division
Height range
Division of measurement
Size of platform
Overall dimension, height
pillar in lowest position
Net weight
Environment for Use
© Adam Equipment Company 2011
300 kg / 660lb
2 kg / 4lb
0.05kg / 0.1lb
60 cm-212 cm / 24”-83”
entry via keypad 1cm / 0.5”
LED display
375 X 275 mm
14.75” X 10.8”
570 X 275 X 1310 mm
22.4” X 10.8” X 51.5”
13 kg / 29 lb.
Temperature: 5ºC-40ºC;
Humidity: <85℅ RH
12vDC 500mA adapter
Internal, re-chargeable
6V 4Ah, 50 hours approx.
External calibration through the keypad.
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[On/Off /
To turn the scale on or off.
To zero the scale if the display drifts from zero.
[Tare] ↵
[Units /
BMI] [Print /
Hold] To tare the scale, if necessary. Accept settings as required
To toggle the weighing unit between Kg and Lb. and to select the BMI
function. Move active digit to the right when required.
To lock the reading even if the person to be weighed is moving and
also to print the weight via the RS232 interface. Increase value or
settings when required.
Indicates when the scale is weighing in Kilograms.
Indicates when the scale is weighing in Pounds.
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 for a preset time when it has held the displayed
Indicates when the scale is displaying the Body Mass Index value.
The charge light will be on when the battery is recharging.
This indicates when the scale is being used with the AC adapter.
This indicator will be displayed in the left corner when the scale
reaches zero.
The Net weight is displayed, Tare weight is at zero.
© Adam Equipment Company 2011
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Take the Physician scale out of the box.
1. Locate the 4 screws (2)
2. Place the cable (4) through the pillar
3. Insert the 4 screws (2) through the
holes on the pillar bracket and secure
the bracket to the indicator (1),
4. Make sure the screws are securely
5. Place the cable (4) into the tube
support (6) on the scale base.
6. Insert the pillar (3) into the tube
support (6).
7. Rotate the pillar to position the
indicator (1) in the direction desired,
and then secure using the 2 screws
(5) into the fixing tube (6).
© Adam Equipment Company 2011
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8. Locate the load cell cable (13) ready for
9. Place the indicator cable (4) and the
load cell cable (13) together near the hole
on the base (16).
10. Plug the two connectors (15) together.
11. Position the connector inside the base
12. The cables should be fixed to the base
using the clip provided (14).
13. Locate the fixing bolt and washer
(10) used to secure the height rod to
the scale base (11)
14. Locate the height rod (7) onto the
fixing points (9) of the upper and lower
brackets (8) & (12).
15. Secure the bolt and washer to the
bracket on the base (10)
16. Tighten the bolt on the upper
bracket (9).
© Adam Equipment Company 2011
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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. The weight will be displayed until the hold
time has expired (see Sec 7.0) or to manually 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.
© Adam Equipment Company 2011
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To measure some ones height, it is necessary to extract the measuring
rod and place the height arm on top of the head of the person being
For shorter heights the height arm can be released by pressing the red
button on the top of the height rod, and then moving the height arm to
the lower section of the height pillar.
The height is read on the bar at the top of the support. The height can
be read in either centimetres or inches,
Once the height has been determined it is possible to enter the height
reading into the display ready for the scale to compute the BMI.
Press and hold the [Unit/BMI] key to enter the BMI mode. The display
will show the last height value used, “Cm123” or “In123” depending on
which weighing unit you are currently using.
The height entry unit (Cm or In) will be flashing to show you which unit
you are currently in, use the Up arrow key to change the height entry
unit between Cm to In as required
Enter your height using the arrow keys, the [Print/Hold] / key will
increment the flashing digit, the right arrow, the [Unit/BMI] / key, will
move the flashing digit to the adjacent digit.
Press the [Tare]/↵
↵ key to confirm the value.
The display will now show the BMI based on the current weight on the
scale and the height entered.
Press the [Unit/BMI] key to exit the BMI mode and return to normal
The Hold function will work as described above whilst in the BMI mode.
© Adam Equipment Company 2011
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Before calibrating the scale, you should ensure that you have a suitable 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.
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.
0.0’ 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
show “300.0” and the kg LED, or “600.0” and the lb LED 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, 300kg or 100lb, 200lb, 300lb, 400lb, 500lb, 600lb); 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 recalibration. )
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.
© Adam Equipment Company 2011
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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:
Factory Set
© Adam Equipment Company 2011
Auto-off time:
No auto-off = 00.
01-15 minutes auto-off time.
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)
Hold time:
0 = no time limit.
1 = 10 seconds
2 = 30 seconds
3 = 60 seconds
4 = 120 seconds
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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The Interface parameters are:
RS-232 output of weighing data
ASCII code
9600 Baud rate (fixed)
1 start bit, 8 data bits,1 stop bit
No Parity
Connection details are:
Connector: 9 pin d-subminiature socket
Pin 2 Output
Pin 3 Input
Pin 5 Signal Ground
8.1 RS-232 connection between the Scale and the Host:
DB9 female
pin 3
pin 2
pin 5
Note: Pins 1,4,6,7,8 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.
© Adam Equipment Company 2011
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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
<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.
© Adam Equipment Company 2011
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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)
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
<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
(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
© Adam Equipment Company 2011
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Table1: The status bits definition:
Byte 2 (H2)
Byte 3 (H3)
Byte 1 (H1)
0= not under 01=normal work
1= not stable 1= under capacity 10= hold work
0= not at zero
0= not over
00=not define
1= at zero point 1= over capacity 11= not define
0= gross weight
always 0
always 0
1= net weight
0= eeprom OK
always 0
always 0
1= eeprom
always 1
always 1
always 1
always 1
always 1
always 1
always 0
always 1
always 0
© Adam Equipment Company 2011
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0¯ ¯ ¯ ¯ ¯
0_ _ _ _ _
Ad ¯ ¯¯
Ad _ _ _ _
zero point is over the setting range
zero is below the setting range
ADC is over max. range;
ADC is below min. range;
there is an error in EEPROM
there is an error in calibration
The capacity will be displayed
The voltage of batteries or input power is below 5.6V.
The capacity has been exceeded by the person
standing on the scale.
Do not dismantle the weighing machine without following the necessary
Do not jump while standing on the platform. This may damage the sensor
Do not move the weighing machine violently and abruptly. Always move
and put down the weighing machine gently.
Wipe any stains with a soft damp cloth using a detergent, then wipe clean
with a dry soft cloth. Do not use organic solutions or boiling water to clean
stains. Do not use a water spray for cleaning.
Keep the weighing machine in a dry and clean environment. Do not
expose it to outdoor use or use it in locations near fire, under direct
sunshine or with high temperature.
When lifting the height meter, extract it directly upwards without using
excessive force.
Do not lift the scale using the height pillar. Lift by the base only.
© Adam Equipment Company 2011
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© Adam Equipment Company 2011
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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
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.
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.
© Adam Equipment Company 2010
ADAM EQUIPMENT is an ISO 9001:2008 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
© 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.
© Adam Equipment Company 2010
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