Adam Equipment PGW Precision Balances PGWMrevB1 User Manual

							 
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·  Remove the item from  the pan 
 
·  Press  [Mode]  to  go  back  to  “ANIMAL      rUN”  to  weigh  another  item   or 
[Esc]  to return to normal weighing  
  
9.4.1.1   Animal Weighing Setup Parameters    
·  Press  [Mode]  and  then  [Up]  or [Down]   to  select  Animal  Weighing.  
When “ANIMAL” is displayed press  [Enter] to enter the function 
 
·  Press the  [Up] or [Down]  key to select  “SEtUP”  
 
·  Press  [Enter]  to  select  “SEtUP”  to  set  up  the  balance  for  animal  
weighing 
 
·  Use  the  [Up]  or [Down]  key  to  scroll  through  the  options  for  setting  up 
the mode. The display will show “MODE AUTO” or “MOD E MANUAL”. 
 
·  Select “MANUAL” or “AUTO” 
   If “AUTO” is selected- 
  Threshold
 (For AUTO mode only) 
 
·  The  display  will  next  show  “THRESHOLD  XX”  where  XX   is  the 
minimum weight of the item required by the balance  to start the process 
for animal weighing. The value will be shown in the  last selected unit.  
  ·   The  XX  can  be  changed  to  between  1  to  99  grams  usi ng  the  numeric 
entry method (see section 7.1) 
 
·  To confirm the desired value, press  [Enter]  
  Test time
 
 
·  After  [Enter]  is  pressed  to select  “MODE  MANUAL”  or  “MODE  AUTO”, 
it  will  display  “TEST  TIME  XX”,  where  XX  is  the  num ber  of  seconds 
over  which  the  balance  will  average  to  compute  the  final  weight  as  set 
during last operation 
  
						

							 
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·  The  XX  can  be  changed  to  between  10-99  seconds  usi ng  the  numeric 
entry method (see section 7.1) 
 
·  To confirm the desired value, press  [Enter] 
  Delay
 
 
·  Next,  the  display  will  show  “DELAY  XX”  where  XX  is   the  time  in 
seconds taken by the balance before the sampling st arts  
 
·  The  XX  can  be  changed  to  between  0-99  seconds  usin g  the  numeric 
entry method (see section 7.1) 
 
·  To confirm the desired value, press  [Enter] 
 
9.4.5  Net / total     
This  function  allows  the  user  to  see  the  total  of  a ll  net  weights  the  value  of 
which  is  displayed  on  smaller  digits  above  the  main   display.  The  current  net 
weight  is  shown  on  the  main  display.  The  [Tare]  key  functions  as  in  the 
normal weighing.     
Steps:  
·  Press  [Mode]  and  then  [Up]  or [Down]   to  select  Net/Total.    When 
“NET/TOT” is displayed press  [Enter] to enter the function. The display 
will  show  zeros  in  both  the  display  areas  accompani ed  by  the  symbol 
“NT” indicating that the balance is in the Net/Tota l mode 
 
·  Place the first item. The net weight will be displ ayed in the main display 
and the smaller digits will still display zeros 
 
·  Press  [Enter].  The  main  display  will  show  zeros  and  the  smaller  digits 
will show the first net weight as total net weight 
 
·  Place  a  second  item  on  the  pan  without  removing  th e  first  one.  The 
main  display  will  show  the  weight  of  the  second  ite m  and  pressing 
[Enter]   will  make  it  show  zeros  and  the  smaller  digits  to  show  the  total 
of both the items 
 
·  Continue until all the items are added to the pan 
  
						

							 
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·  When  finished  press  [Mode]  to  transfer  the  total  of  the  net  weights  to 
the main display 
 
·  Pressing  [Print]  will  print  a  report  containing  individual  net  weig hts 
followed by the final net weight total. 
9.4.6  Density Determination    
It is possible to determine the density of solids o r liquids using this mode. The 
user selects the type of density to be determined a nd then enters values to be 
used by the balance.    
The  density  mode  allows  the  user  to  use  a  special  D ensity  Kit  or  use  the 
below pan weighing facility to perform the necessar y weighing. 
   
DENSITY OF SOLIDS
    
 
To  perform  the  density  of  solids  test,  the  user  mus t  have  a  method  to 
immerse  the  sample  in  the  chosen  liquid.  The  densit y  of  the  liquid  must  be 
known or determined from a look-up table. 
 
For  water  and  ethanol  the  density  will  be  calculate d  based  on  the 
temperatures entered using the numeric entry method  (see section 7.1) 
  
Steps: 
 
·   Press  [Mode] and then  [Up] and  [Down]  keys to select density 
 
·  Press  [Enter] to enter Density mode. 
 
·  Press  the  [Up]  and  [Down]   keys  to  select  the  solids  or  Liquid  method 
when “DENSITY SOLId”” or “DENSITY LIqUId” is displa yed 
 
·  Press  [Enter] to select the solids method 
 
·  Press  [Up] or [Down]  to select the liquid - Water, Ethanol or Other 
 
·  Press  [Enter] to  select  the  choice.  For  water  and  Ethanol  the 
temperature  will  be  asked  for.  Enter the  temperatur e  using  the  numeric 
entry method (see section 7.1) 
 
·  For  the  “Other”  choice  the  density  will  be  asked  f or.  Enter  the  density 
(g/cc) using the numeric entry method (see section  7.1)  
						

							 
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·  Press  [Enter] to continue 
 
·  The  balance  will  request  the  weight  of  the  sample  in  air  by  displaying 
“AIR  WEIGHT”.  Place  the  item  on  the  pan  or  receptac le,  if  the  density 
kit  is  used  and  press  [Enter].  The  weight  will  be  shown  in  the  last 
selected unit 
 
·  After completion of the air weighing, the balance  will request the weight 
in liquid by displaying “LIQUID WT”. Submerge the i tem in the liquid and 
press  [Enter]   to  start  the  liquid  weighing.  The  weight  will  be  s hown  in 
the  last  selected  unit.  After  completion  of  the  liq uid  weighing,  the 
balance  will  compute  the  density  of  the  sample  and  display  it  as 
“DENSITY XXXX g/cc” 
 
·  Remove the item from the pan 
 
·  Press  [Mode]  to  continue  with  a  new  sample    or  press    [Esc] to  return 
to normal weighing 
  
DENSITY OF LIQUID
      
  
When  finding  the  density  of  a  liquid,  it  is  necessa ry  to  weigh  a  sample  of 
known volume in air and then in the liquid. The vol ume of the sample must be 
entered by the user. The last known volume is store d for use at any time. 
 
If  using  the  density  determination  kit,  the  volume  of  the  plumb  is  marked  on 
its support, i.e. 10.123  
Steps: 
·  Press  [Mode] and then  [Up] and  [Down]  to select Density 
 
·  Press  [Enter] to select the Density mode 
 
·  Use  [Up] and  [Down]  to scroll through the solid or liquid method 
 
·  When “DENSITY LIqUId” is shown, press  [Enter] for the liquid method 
 
·  The volume will be asked for. Enter the volume usi ng the numeric entry 
method (see section 7.1) or continue using the last  volume entered 
 
·  Press  [Enter] to continue 
  
						

							 
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·  The balance will request the weight in air by disp laying “AIR WEIGHT”. 
Place  the  glass  plumb  supplied  with  the  density  det ermination  kit  in  air 
on  the  weighing  pan  and  press  [Enter]  to  start  the  air  weighing.  The 
value will be shown in the last selected unit.  
 
·  After completion of the air weighing, the balance  will request the weight 
in liquid by displaying “LIQUID WT”. Submerge the i tem in the liquid and 
press  [Enter]   to  start  the  liquid  weighing.  The  weight  will  be  s hown  in 
the  last  selected  unit.  After  completion  of  the  liq uid  weighing,  the 
balance  will  compute  the  density  of  the  sample  and  display  it  as 
“DENSITY XXXX g/cc” 
 
·   Remove the item from the pan 
 
·  Press  [Mode]  to  continue  with  a  new  sample    or  press    [Esc] to  return 
to normal weighing 
 
·   Pressing  [Print] will print the density value in g/cc. 
 
10  CALIBRATION 
 
The PGW..M series can not be calibrated with an ext ernal mass. 
  
10.1  MANUAL CALIBRATION    
Pressing  the  [Cal] key  will  start  calibration  automatically  using  an  i nternal 
mass.    When  calibration  is  complete  the  balance  wil l  return  to  weighing. 
Calibration  is  also  initiated  by  a  change  in  intern al  temperature  by  2°C  or  at 
an interval of 4 hours. See section 10.2.   
10.2  AUTOMATIC CALIBRATION    
The  Auto  Calibration  feature  can  not  be  disabled  or   changed  by  the 
user.  The  balance  performs  automatic  calibration  when  any   of  the  following 
conditions have been met:  
1.  5 minutes after power is applied to the balance 
2.  Internal temperature changes by ±2ºC  
3.  Time since last calibration exceeds 4 hours  
   
						

							 
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After  the  self-test  on  the  first  power  on,  the  bala nce  will  display  “WARM  UP” 
and  countdown  from  300  seconds  before  performing  th e  automatic 
calibration.  Subsequently,  it  will  calibrate  automa tically  whenever  there  is  a 
change  in  internal  temperature  by  2°C  or  after  ever y  4  hours.  The  balance 
should  be  at  a  stable  zero.  The  user  knows  a  calibr ation  is  asked  for  by  the 
flashing  of  the  “CAL”  symbol  on  the  display.    Press ing [Esc]   during  this  time 
will  postpone  the  calibration  by  1  minute  to  allow  the  weighing  in  progress  to 
be completed.    
 
11  RS-232 INTERFACE 
 
The balances have the ability to send or receive da ta over the serial interface. 
 
The  weighing  data  can  be  sent  over  the  interface  ei ther  automatically  or 
when the user presses the  [Print] key. The weight values on the display and 
the RS-232 output are marked with brackets on the l east significant digit. For 
example- 
                      NET   123.4[5] g       
The user has control over what data is to be printe d.  
 
 
The following gives a description of the RS-232 int erface. 
 
HARDWARE 
 
The RS-232 interface is a simple 3 wire connection.  The input and output 
connections are: 
 
Connector:    9 pin D-sub miniature socket 
      Pin 2 input to balance RXD 
      Pin 3 output from balance TXD 
      Pin 5  Signal ground GND 
 
Handshaking is not applied. 
 
Baud rate:    4800, 9600, 19200, 38400 
 
Parity:     NONE (= 8N1), EVEN (=7E1) or ODD (=7 O 1) 
 
All lines are terminated with carriage return and l ine feed (). 
 
In continuous output mode, or if single-line output  on demand is selected, the 
serial output format will be a single line in the f orm “1234.567 g”. 
 
The  format  of  the  single-line  output  will  change  de pending  on  the  mode  in 
which the balance is operating, as described below.  
  
						

							 
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If  output  on  demand  is  selected,  the  user  may  optio nally  configure  the  serial 
output  as  a  choice  of  3  styles  of  form,  either  in  a   default  format  or  in  one  of 
two  custom formats.  Each  of the  custom  formats  can  be configured  to  output 
up to 15 lines of data. The data types that can be  printed are: 
NAME  TEXT PRINTED 
ID number  ID no.:  xxxxxxxxxxxx 
Serial number  Serial no. xxxxxxxxxxxx 
Date  DATE  dd/mm/yyyy 
Time  TIME   hh:mm:ss 
Net weight   Net: xxx.xxx g 
Gross weight  Gross: xxx.xxx g 
Tare weight  Tare: xxx.xxx g 
Unit weight  Unit wt: xxx.xxx g 
Count  Count: xxxx pcs 
Reference weight  Ref. wt: xxx.xxx g 
Percent  Percent: xx.xxx % 
Checkweigh lower limit  Low: xxx.xxx g 
Checkweigh upper limit  High: xxx.xxx g 
A blank line printed   only. 
 
 
Any  of  these  can  be  printed  on  any  of  the  15  lines  available.    Not  all  items 
need to be used and any one can be used more than o nce (see section 13.3). 
 
The  data  for  each  form  will  be  preceded  by  a  start- of-header   
character  (01)  and  terminated  with  an  end-of-transm ission    character 
(04).  These  characters  will  be  ignored  by  a  serial  printer  but  will  allow  a 
computer  program  which  reads  the  data  to  distinguis h  between  this  block 
report format and the single-line output format des cribed above. 
 
STANDARD FORMAT 
 
The  balance  will  print  the  following  data  as  the  st andard  form.  The  standard 
form  cannot  be  changed.  The  format  of  the  custom  fo rms  #1  and  #2  will  be 
the same as the standard form until modified by the  user. 
 
Line 1  Date 
Line 2  Time 
Line 3  Blank line 
Line 4  ID number 
Line 5  Blank line 
Line 6  Result 
Line 7  Blank line 
Line 8  Blank line 
   
						

							 
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This will result in a printout that looks like: 
 
 
 
   
     
 
 
*NOTE:
  The  format  of  the  results  line  will  change  dependin g  on  the  mode  in 
which the balance is operating, e.g. 
          Normal weighing, Check weighing, Animal wei ghing: 123.4[5] g 
                Parts counting: “1234 pcs”  
                Percent weighing: “12.34 %”  
INPUT COMMANDS USING REMOTE KEYS 
 
The  balance  can  be  controlled  with  the  following  co mmands  sent  using 
remote keys  such as from  a  PC.  The commands  must  be   sent  in  upper case 
letters,  i.e.  “ KT”  not  “ kt”.  Press  the  Enter  key  of  the  PC  after  each  command  
(the action of Carriage Return is denoted as  a s shown below). 
 
Basic Input Commands: 
!KT    Tares  the  balance  to  display  the  net  weight.  This  i
s  the  same  as  pressing 
the  [Zero / Tare]  key when the balance is in the normal weighing mod e. 
 
!KS  Enters  the  Setup  section.  This  is  the  same  as  press ing  the [Setup]  key 
when the balance is in the normal weighing mode.   
Once  entered  the  Setup  section,  the  balance  can  be  controlled  remotely 
using  the  Input  Commands  (as  mentioned  in  this  tabl e)  which  will  perform 
the same key functions as described in section 13.0 . 
 
!KP     Transmits  data  over  RS-232  interface.  This  is  the  s
ame  as  pressing  the 
[Print]  key when the balance is in the normal weighing mod e. 
 
!KM  Enters  the  Modes  section.  This  is  the  same  as  press ing  the [Mode]  key 
when the balance is in the normal weighing mode.   
!KC  Enters  the  Calibration  section.  This  is  the  same  as   pressing  the [Cal]  key 
when the balance is in the normal weighing mode.   
!KU  Enters  the  Unit  selection  section.  This  is  the  same   as  pressing  the [Unit] 
key when the balance is in the normal weighing mode . 
 
 
 
Date:  23/09/04  
Time:  15:45  
ID No: 123456 
Net:   123.4[5] g 
 
  
						

							 
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Invalid Input Command: 
 
If an invalid command is received, then the command  is returned as follows- 
Invalid Command  Message returned  Remarks 
!NT  !EU  Command character is not ‘K’  
!KK  !EK  Key character is not ‘T’, ‘S’, ‘P’,  ‘M’, ‘C’ 
or ‘U’ 
!KT-  !EF  Command  format  error,    is  not  the fourth character 
 KT  or  
!KT -  No reply  Either  ‘!’  or    is  missing  in  the 
command string 
     
  
						

							 
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12  ERROR CHECKING 
 
During  weighing  the  balance  is  constantly  checking  to  see  if  it  is  operating 
within the limited parameters.  The errors likely t o occur are: 
  
  A/D counts below lowest allowed value 
  A/D counts above highest allowed value 
  A/D not operating 
  Maximum capacity exceeded   
Other  errors  may  be  detected  during  special  functio ns  or  operations.    These 
will be described in the section that applies.   
Error messages and the reasons are: 
Concerning A/D counts 
ERROR ADc UL  A/D counts below a limit 
ERROR ADc OL  A/D counts above a preset limit 
Concerning calibration 
ERROR StAb  Calibration could not be completed   
because the results were not stable   
ERROR LO or  ERROR HI 
Calibration constant not within 20% of old  
calibration constant 
Concerning weighing 
ERROR LO  Weight display is below zero by >4%max 
ERROR LOAd  Weight is above maximum plus 90d