Adam Equipment MDW Physician Scales MDW250LREVE User Manual

							© Adam Equipment Company 2011              Page 10   
 
6.0  CALIBRATION 
  
Before calibrating the scale, you should ensure tha
t 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 “
[AL.OFF” and then exit this mode. If the indicator shows “[AL-
?
”, the scale is ready for calibration. 
 
3.  When  the  indicator  shows  “
[AL-?”,  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
0.00.0
0.0’  is  displayed  the  scale  will  begin  to  calibrate  th
e  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 “
250.0
250.0 250.0
250.0” and the kg LED, or “500.0
500.0 500.0
500.0” 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  p ress  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  disp layed  data  will  flash  on  the 
display  and  if  the  scale  accepts  the  calibration da ta  it  will  calculate  and  store  the 
information  into  the  EEPROM.  If  an  error  has  occurr ed,  the  scale  will  display 
“CAL.  Er”  and  return  back  to  step  4  for  re-calibrat ion.  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  yo u  calibrated  at  back  on  the 
scale, if it is off repeat the calibration process  again. 
  
						

							© Adam Equipment Company 2011              Page 11   
 
7.0  USER PARAMETERS 
  
This indicator has 4 parameter settings that can be
 selected. 
 
1. When the scale is in normal weighing mode, press an d 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 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)  
						

							© Adam Equipment Company 2011              Page 12   
 
8.0  RS232 COMMUNICATIONS 
(Only applied for scale with RS232 interface) 
   
The Interface parameters are:
 
  Connection details are: 
 
 
8.1  RS-232 connection between the Scale and the Host : 
      Scale -----------------------Cable----------- ----------------Host 
    (DB9 female)-------- (DB9 male) ---- (DB9 femal e) -------- (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 con nected. 
  
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  
						

							© Adam Equipment Company 2011              Page 13   
 
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:  < reading, minus, decimal point, weight unit>GR  
Or < reading, minus, decimal point, weight unit >NT 
    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:  < reading, minus, decimal point, weight unit>GR  
Or < reading, minus, decimal point, weight unit >NT 
  
8.5  When Parameter S.F. in section 7 is set to 3 :  
 
The baud rate and data format are fixed with respon ses to serial commands being 
within 300 milliseconds. One second should be adequ ate for use as a time-out 
value by remote (controlling) device.  
 
8.5.1  The length of the weight field will be 7 digit wei ght 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 retur n nine ‘^’ characters (the field of 
minus sign, decimal point, weight data is filled by  ‘^’).  
  If the weight is under capacity, it will return nin e ‘-’ 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 
 Line Feed character (hex 0AH)   
 Carriage Return character (hex 0DH) 
 End of Text character (hex 03) 
 Space (hex 20H) 
H1H2H3 Three status bytes. Refer to Table1 for defi nition.  
						

							© Adam Equipment Company 2011              Page 14   
  Polarity character including minus sign for ne
gative weight and a space 
character for positive weight 
W1-W7 weight data  
   decimal point 
U1U2: measure units, kg, lb 
8.5.3  Commands and response 
(1) Command: W  (57h 0dh)   
Response: 
^^^^^^u1u2H1H2H3---over capaci ty 
______u1u2 H1H2H3 ---under cap acity 
---------u1u2 H1H2H3---zero-point error 
< L F > < p > w 1 w 2 w 3 w 4 w 5 w 6 < d p > w 7 u 1 u 2 < C R > < L F > H 1 H 2 H 3 < C R > 
 ---Scale is stable, and the current weight un it is kg or lb. With or 
without decimal point and the position is as per th e P9 setting and current 
unit.    
(2) Command: S  (53h 0dh)  Response:  H1H2H3  
(3) Command: Z  (5ah 0dh)  Response: Zero function is activated and it returns  to current scale status. just 
like pressing  ZERO/ON/OFF  button: 
 H1H2H3 
If ZERO function cannot be activated, it will retur n to current scale status. 
 
(4) Command: T  (54h 0dh)  Response: TARE function is activated, and then retu rns scale status. just like 
pressing  TARE button: 
           H1H2H3  If TARE function cannot be activated, it will retur n to current scale status. 
 
(5) Command: U  (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.  
u1u2 H1H2H3  
(6) Command: X  (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              Page 15   
 
Table1: The status bits definition:  
Bit  Byte 1 (H
1)  Byte 2 (H2)  Byte 3 (H3)  
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 
  
						

							© Adam Equipment Company 2011Page 16 
9.0  ERROR MESSAGES 
1.0
00 0 ¯ ¯  ¯  ¯  ¯  zero point is over the setting range 
2.0
00
0 _ _ _ _ _  zero is below the setting range 
3.Ad
AdAd
Ad ¯ ¯  ¯¯  ADC is over max. range; 
4.Ad
AdAd
Ad  _ _ _ _  ADC is below min. range; 
5.EEP.Er
EEP.ErEEP.Er
EEP.Er  there is an error in EEPROM  
6.[
[[
[A\b.Er A\b.ErA\b.Er
A\b.Er there is an error in calibration 
7.[
[[
[AP APAP
AP .-- The capacity will be displayed  
8.\bo.bAt
\bo.bAt\bo.bAt
\bo.bAt The voltage of batteries or input power is below  5.6V. 
9.FU\b\b
FU\b\bFU\b\b
FU\b\b The capacity has been exceeded by the person 
s tanding on the scale. 
10.0 WARNING 
·
Do not dismantle the weighing machine without following the necessaryinstructions.
· Do not jump while standing on the platform. This may damage the sensor
inside.
· 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 2011Page 17  
						

							© Adam Equipment Company 2011 
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. 
Maidstone Road, Kingston, Milton Keynes, MK10 0BD  United Kingdom 

F

CC COMPLIANCE 
This  equipment  has  been  tested  and  found  to  comply  w
 ith  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  t
 his  equipment  to  insure  compliance  with  the 
pertinent RF emission limits governing this device. 
Changes  or  modifications  not  expressly  approved  by  A
 dam  Equipment  could  void  the  users 
authority to operate the equipment. 
W

EEE 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 
e

nvironment  as   listed  in  Directive  2002/95/EC  or  amending  legislat
 ion.    Battery  disposal  in  Landfill 
Sites  is  more  regulated  since  July  2002  by  regulation  9  of  the  Landfill  (England  and  W ales) 
Regulations  2002  and  Hazardous  Waste  Regulations  2005.  Battery  recycling  has  become  topical 
and  the  W aste  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: 
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-Crane scales 
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-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 
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