Adam Equipment PGW Precision Balances PGW2revA User Manual

							 
© Adam Equipment Company 2010                        19 
 
  Next  the  beeper  setting  is  displayed.  Press  [Up]  or [Down]   to  scroll 
through the options –    
“BUZZER OFF”   (Beeper set to off at all times) 
“BUZZER In”   (Beeper  will  sound  when  the  weight  on  the  pan  is 
                              
stable and within the limit)     
“BUZZER Out”    (Beeper  will  sound  when  the  weight  o n  the  pan  is 
stable and outside the set limits) 
 
   Confirm the beeper setting by pressing  [Enter] 
 
  When  a  weight  is  placed  on  the  pan  now,  the  displa y  will  indicate 
whether  the  weight  is  below  the  LOW  LIMIT  between  t he  LOW  and 
HIGH LIMITS or higher than the HIGH LIMIT using the  capacity tracker,  
 
  To  perform  check  weighing  with  another  sample  pres s [Mode]   and 
continue as before 
 
 
   To return to normal weighing, press  [Enter]  
9.4.4  Animal / Dynamic Weighing 
 
The  balance  can  be  set  to  weigh  animals  or  moving  i tems,  also  known  as 
dynamic weighing. The balance will collect the weig ht over a period of time to 
arrive at  an  average value and display  the  value  un til  the  operator resets  the 
balance.  The  actual  weighing  process  can  begin  eith er  automatically  when 
the  weight  is  placed  on  the  pan  or  when  initiated  b y  the  operator.  The 
weighing  unit  can  be  selected  as  normal  using  the  [Unit]  and [Enter]   keys, 
before entering the Animal / Dynamic Weighing proce ss. 
 
Steps:    
  Press  [Mode]  and  then  the  [Up]  or [Down]   key  to  select  Animal  / 
Dynamic Weighing.  When “ANIMAL” is displayed press  [Enter]  to enter 
Animal Weighing mode 
 
   Press  [Up] or [Down]  to  select  “rUN”  for  starting  the  animal  /  dynamic 
weighing  using  the  method  previously  set  or  “SEtUP”   to  set  up  the 
balance for animal weighing (see the section 9.4.4. 1 Animal Weighing 
Setup Parameters ) 
  
						

							 
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MANUAL MODE 
  
When the balance is in the MANUAL mode –
  
 
If  [Enter]  is pressed when “rUN” is selected, balance will di splay “START ?” 
 
Place the item on the pan and press [Enter] again 
 
After  the  configured  Delay  and  test  time  are  comput ed  by  the  balance,  the 
result  will  be  displayed  by  showing  “FINISHED  xx.xx  x”  after  a  pre-set  time 
Delay and Sampling period (see the section 9.4.4.1 Animal Weighing Setup 
Parameters) 
  
AUTO MODE
 
  
When the balance is in the AUTO mode –
 
 
If  [Enter]  is pressed when “rUN” is selected, balance will di splay “LOAD PAN” 
 
Place the item on the pan. The animal weighing test  will begin automatically 
 
After  the  configured  Delay  and  test  time  are  comput ed  by  the  balance,  the 
result will be shown displaying “FINISHED xx.xx x” (see the section 9.4.4.1 on 
Animal Weighing Set-Up Parameters) 
 
  During animal weighing if the  [Print] key is pressed, the balance will 
display “PAUSED” and show the current average weigh t 
 
  To resume, press  [Print] again or 
 
  Pressing  [Mode] will display “STOPPED” and terminate the weighing 
 
  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  
  
9.4.4.1  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”   
						

							 
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  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  from  1  to  99  grams  using  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 
 
  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] 
  
						

							 
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9.4.5  Net/Total     
This  function  allows  the  user  to  see  the  total  of  a ll the  net  weights,  the  value 
of  which  is  displayed  on  smaller  digits  above  the  m ain  display.  The  current 
net  weight  is  shown  on  the  main  display.  The  [Tare]  key  functions  the  same 
way 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 
 
  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  
						

							 
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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) 
 
  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 
 
    
						

							 
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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 
 
  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. 
 
  
						

							 
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10.0  CALIBRATION 
 
The  PGW  XXXe  series  can  only  be  calibrated  with  an  external  mass.    The 
PGW  XXXi  series  can  be  calibrated  with  either  an  in ternal  mass  (default 
method)  or  an external mass  (if  setup by  the  user  t o do this).     See  the  User 
Parameters section. 
 
10.1  MANUAL CALIBRATION 
 
Pressing the  [Cal] key will start calibration. Calibration can also be  initiated by 
a  change  in  internal  temperature  or  a  set  time  peri od  as  determined  by  the 
user (see section 13.5). 
 
10.1.1  Calibration using Internal Calibration mass 
 
Calibration will begin automatically.  When calibra tion is complete the balance 
will return to weighing.  
 
10.1.2  Calibration using External Calibration mass 
 
   Pressing  [Esc] will abort the calibration at any time 
 
  Press the  [Cal] key 
 
  The  display  will  show  the  balance  setting  a  new  Ze ro  condition  by 
showing  “LOAD  0”.  Make  sure the  pan  is  empty  then  p ress  the [Enter] 
key to continue 
 
   The display will show the busy symbol and then wil l ask for the value of 
the  calibration  mass  to  be  entered  sounding  a  beep  and  displaying  the 
default  calibration mass.  For  example,  for  PGW753e  model  the  display 
will  be  “CAL  MASS  500,000  g”  where  500g  is  the  defa ult  calibration 
mass. Using the numeric entry method, the user may  alter the displayed 
value to any value ranging from one-third to full c apacity of the balance. 
For example, “CAL MASS 300,000 g”. Press  [Enter] to continue 
 
  The  balance  will  then  show  the  value  of  the  calibr ation  mass  selected 
sounding a beep, i.e., “LOAD 300,000 g”  
 
   Place the selected mass on the balance. Press  [Enter] to continue  
  The display  will show the busy symbol and after ca libration is complete 
it will display “UNLOAD” sounding a beep. Remove th e weight. Another 
beep  will  be  heard  confirming  the  unloading  action.   The  balance  will 
then return to normal weighing. 
  
						

							 
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10.2  AUTOMATIC CALIBRATION 
 
The  balance  will  have  the  ability  to  calibrate  (or  ask  for  calibration)  when  the 
balance  has  automatic  calibration  enabled  and  the  c onditions  of  the 
automatic calibration have been meet.  
 
Conditions that will cause an automatic calibration  are:  
1.  Internal temperature change greater than a prese t amount, typically 2ºC 
for Precision balances.  
2.  Time since last calibration exceeds a preset tim e, typically 4 hours or 15 
minutes after power is applied. 
 
On  the  balances  with  internal  calibration  the  calib ration  will  be  done 
automatically  when  the  balance  is  at  a  stable  zero.   The  user  knows  a 
calibration  is  asked  for  by  the  flashing  of  the  “CA L”  symbol  on  the  display.  
The display will show a 5 second countdown when cal ibration will start.  If the 
user presses the  [Esc] key the calibration will be delayed one minute to  allow 
time for a process to be finished.   
 
On balances with external calibration the balance w ill call for calibration to be 
carried  out  by  flashing  the  “CAL”  symbol  on  the  dis play.  As  soon  as  the 
balance is calibrated the symbol will be turned off .   
 
The  Auto  calibration  feature  can  be  enabled,  disabl ed  or  changed  within  the 
user options to meet the requirements of the users.  
 
 
10.3  CALIBRATION ERRORS 
 
Occasionally during calibration an error will be de tected. These errors can be 
caused by:      Unstable readings 
Improper calibration weights being used  
Large shifts of zero from the factory settings   
When an error is found a displayed message will be  shown and the 
calibration must be done again.  If the balance has  error messages more than 
once it is possible the mechanics have been damaged .   
						

							 
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11.0  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 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.  
 
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  
						

							 
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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 
  
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: “123.456 g” 
                Parts counting: “1234 pcs”  
                Percent weighing: “12.345 %”    
Date:  23/09/04  
Time:  15:45:27   
ID No: 123456  
Net: 123.456 g