Adam Equipment PGW Precision Balances PGWMrevB1 User Manual

							 
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13  SUPERVISOR MENUS 
 
Pressing  the 
[Setup] key  while  in  normal  weighing  gives  access  to  the 
menus.    
·  When   [Setup]  is  pressed  and  the  Supervisor  Passcode  is  not  enabl ed 
the display will show the Supervisor menus.  If pas scode is enabled, the 
balance will ask for it by displaying “PASSCODE 0”    
 
·  If  a  wrong  code  is  entered  an  “ERROR  CODE”  message   will  flash  and 
the balance will return to weighing mode 
 
·  If  the  passcode  has  been  enabled  and  entered,  the  balance  will  allow 
the  operator  to  access  the  Supervisor’s  menus  by  wh ich  the  user  can 
enable/disable weighing units or modes, set balance  parameters for the 
conditions,  set  time  and  date,  set  parameters  for  t he  RS-232  interface, 
and security parameters 
 
·  The  display  will  show  the  first  menu  item  “UNITS”.   The [Up]  and 
[Down]   keys  will  cycle  through  the  main  menu  items,  press ing  the 
[Enter]  key  will  enter  the  sub-menu  or  options  can  be  set.  Press 
[Mode]
 to  come  out  of  a  sub-menu  or  [Esc]  to  return  to  normal 
weighing 
 
  
13.1  ENABLE WEIGHING UNITS 
   
·   When  “UNITS”  is  displayed,  press  [Enter].    The  display  will  show  the 
symbol  for  the  first  unit,  e.g.  carats,  ct,  togethe r  with  its  enable  state 
“OFF”  or  “On”.  The  user  can  then  enable  or  disable  the  carats  unit  by 
using  [Up]  or [Down] .  Pressing  [Enter] will  confirm  the  setting  and  will 
advance  to  the  next  weighing  unit.    Repeat  for  each   weighing  unit  in 
turn.  Gram is always enabled 
 
·  Press  [Mode]  to  advance  to  setting  of  the  next  menu  or  press  [Esc] to 
return to normal weighing 
 
13.2  ENABLE WEIGHING MODES 
 
Same steps are followed to enable or disable the we ighing modes. 
  
						

							 
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·  Press  [Enter] when  “MODES”  is  displayed.  The  display  will  show  th e 
first mode i.e., Parts Counting (“PARTS”) together  with its enabled state 
“OFF” or “On”. The user can enable or disable the p arts counting mode 
by  using  [Up]  or [Down] .  Pressing  [Enter]  will  confirm  the  setting  and 
will advance to the next weighing mode. Repeat for  each mode in turn 
 
·  Press  [Mode]  to  advance  to  setting  of  the  next  menu  or  press  [Esc] to 
return to normal weighing 
 
13.3  ENABLE SERIAL INTERFACE PARAMETERS 
 
The  parameters  affecting  the  serial  setup  are  set  i n  a  similar  manner  to  the 
other  parameters.  Press  [Enter]  when  “SERIAL”  is  displayed  to  enter  the 
sub-menu. The parameters that can be set are:    
						

							 
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ENABLE  The serial port can be set to On or OFF 
BAUD RATE    Set  the  Baud  Rate  to  4800,  9600,  19200  or  38400,  th
e 
default rate being 4800 
PARITY  Set the Parity to NONE, EVEN or ODD 
CONTINUOUS Set the RS-232 to send data continuously to On or O FF 
PERIODIC  Set the RS-232 to send data periodically ( set in seconds) 
to On or OFF. If On is selected, the value can be c hanged 
between 1 and 999 seconds, using  [Up] and  [Down]   
FORMAT    To  send  data  as  a  single  line  of  data,  using  the  st
andard 
format  or  using  a  customer  designed  format  (FORM  1  or 
FORM 2).  
  
Format of custom forms #1 and #2
 
  
If  FORM1  or  FORM2  is  selected,  it  can  be  changed  by   the  user  using  a 
selection  of  available  data.    By  default  the  2  form s  are  the  same  as  the 
standard form unless changed by the user as below. 
 
When  FORM  1  or  FORM  2  is  selected  the  user  can  set  the  information  to  be 
printed  on  each  line  of  the  form.    Pressing  the  [Up] or  [Down]  keys  will  cycle 
through the options available. The options are:
 
INST ID  Instrument ID number 
SER No  Serial Number 
TIME  Time  
DATE  Date 
NET  Net Weight (Gross weight – Tare Weight) 
GROSS  Gross Weight 
TARE  Tare Weight 
UNIT  Unit weight in parts counting mode 
COUNT  Number of items in parts counting mode 
REF  100% weight in percent weighing mode 
PERCENT Percentage of reference weight in percent weighing 
LO LIMIT  Low Limit when check weighing 
HI LIM  High Limit when check weighing 
Cr Lf  Inserts a blank line 
END  Signifies the end of the report  When END is entered the display returns to the RS-2 32 Sub-menu
 
  
						

							 
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Enter  the  data  to  be  printed  on  the  first  line  by  p ressing  the [Up] or  [Down]  
key  to  cycle  through  the  options.  If  the  current  in formation  is  OK  then  press 
the  [Setup]/Enter  key to move to the next line.  
 
e.g. “LINE No1”  “DATE” - prints date  
 
Select a code for one of the preset data formats as  detailed above. 
 
The next line shows:  “LINE NO 2”   “TIME” - prints time 
Only one item can be entered per line. 
 
Continue  until  the  formatting  of  the  form  is  comple te.  There  are  15  lines  of 
possible  data.  After  the  15th  line  has  been  set  or  “END”  has  been  selected, 
the balance will return to the RS-232 Sub-menu. 
 
Press  [Mode]  to advance to setting of the next menu or press  [Esc] to return 
to normal weighing. 
 
13.4  SETUP PARAMETERS 
 
The  user  parameters  that  control  the  balance  are  sh own  under  the  SETUP.  
When  “SETUP”  is  displayed,  press  the  [Setup]/Enter key.  The  options  for 
each parameter can be scrolled through by using the  [Up]  or [Down]  key.   
 
 
LANGUAGE 
  English  
French 
German 
Spanish
 
 TIME  Set  Time  using  the  numeric  entry  method 
(see section 7.1)   
 
 DATE    DATE FORM  
               EUROPE (dd/mm/yy)
 
                       USA (mm/dd/yy)                         
Set  Date  using  the  numeric  entry  method  
(see section 7.1)
 
 INST ID  Enter a user number to identify this balan ce 
 
 BUZZER   On= Enable 
OFF= Disable
 
 BACKLIGHT   On  
OFF 
AUTO (default)
 
 POWER DOWN   Set the time after which the unit will go into 
Stand-by  power  settings,  On=Enable, 
OFF=Disable, If set to On-              
the options are 1 to 9 minutes
  
						

							 
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 FILTER    Set  a  value  for  the amount  of filtering to  be 
done ranging from 1 to 10. A larger number  
means  more  filtering  and  a  slower 
response. 
 
 STABILITY   
Set  a  value  to  be  used  to  determine 
balance  stability,  set      a  value  of  1,  2,  5  or  
10d.    A  larger  number  corresponds  to  a  
larger stable zone. Default is 5
 
AUTO ZERO  Can  be  set  to  On  or  OFF  to  enable  the 
auto-zero function. If set to  On- select from  
1, 2 or 5d
 
 
The sub-menu is entered by pressing  [Enter] – 
 
·  Use  the  [Up] and [Down]   keys  to  increase  or  decrease  the  value  for 
setting.  Press  [Enter] to  accept  the  setting  and  advance  to  the  next 
item in the menu 
 
·  Press  [Mode]  to  advance  to  setting  of  the  next  parameter  which  is 
“PASSCODES” or  [Esc] to return to normal weighing 
  
13.5  PASSCODES 
 
To  enable  the  security  features  in  this  balance  it  is  necessary  to  set 
passcodes. There are 2 passcodes called Operator Pa sscode and Supervisor 
Passcode.  The  Operator  Passcode  allows  an  authorise d  user  to  operate  the 
basic  weighing  functions  of  the  balance  but  will  no t  allow  access  to  the 
Supervisor Menus if the Supervisor Passcode has bee n set.   
 
To  change  or  disable  a  Passcode  it  will  be  necessar y  to  enter  the  current 
passcode.    
 
Press  [Enter]  when “PASSCODES” is displayed  to enter this section. 
  
OPERATOR  Enter  the  current  passcode  (OLD)  first  the n  enter  a  new 
passcode if desired.   A passcode set to zero will  disable 
the security feature and allow unlimited access.     
SUPERVISOR  First  enter  the  current  passcode  (OLD)  a nd  then  enter  a 
new  passcode  if  desired.      A  passcode  set  to  zero  w ill 
disable the security feature and allow unlimited ac cess.   
 
  
						

							 
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13.5.1  Forgotten Passcodes 
 
Keep  a  record  of  the  passcode  to  ensure  you  can  acc ess  this  section  again.  
If  however  you  have  forgotten  your  passcode  you  can   still  gain  access  by 
entering a universal code.    
If  you  have  forgotten  the  current  passcode  a  code  o f  “15”  will  always  allow 
you to enter the Supervisor area.      
Using  the  Supervisor  menus  go  to  the  PASSCODE  secti on  and  reset  the 
operator or Supervisor passcode using the “15” code  as the old number when 
asked.   
 
14  PERIPHERALS  
 
The peripherals that can be used with the balance a re the following: 
  
DENSITY DETERMINATION KIT  
(for 0.001g units only) 
  
The  Density  Determination  Kit  includes  everything  n eeded  to  carry  out 
precise and repeatable measurement. The kit allows  a sample to be weighed 
in air and then a liquid to determine the density o f the sample. It also allows a 
glass sinker of known volume to be weighed in air o r in a liquid, to determine 
the density of the liquid.   
   
ANTI-VIBRATION TABLE 
  
The  Anti-vibration  Table  is  a  support  for  laborator y  balances  that  isolate  the 
balance  from  vibration  through  the  floor.  The  table   has  a  granite  surface  for 
the balance with a separate table top surrounding t he balance.   
   
ADAM PRINTERS     
  
The  Adam  Printer  is  a  compact  thermal  printer  which   is  ideal  for  use  with 
laboratory  balances.    There  are 3  versions,  one to  print data  as  it  is  received 
from the balance, second one prints data and time a long with weighing data if 
enabled by the balance and the other one has the ab ility to perform statistical 
analysis of the weighing results if enabled by the  balance.   
						

							 
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15  SAFETY AND MAINTENANCE 
   
CAUTION 
Use  the  AC  adapter  designed  by  the  manufacturer  for   the  balance.  Other 
adapters may cause damage to the balance. 
 
Avoid overloading or dropping material onto the pla tform which could damage 
the balance.    Do  not  spill  liquids  on  the  balance  as  it  is  not  wa ter-resistant.  Liquids  may 
damage the case and if it gets inside the balance i t may cause damage to the 
electronics. 
 
Material  that  has  a  static  electric  charge  could  in fluence  the  weighing. 
Discharge the static electricity of the samples, if  possible.  Another solution to  
  
the  problem  is  to  wipe  both  sides  of  the  pan  and  th e  top  of  the  case  with  an 
anti-static agent. 
 
16  TROUBLE-SHOOTING  
Service  of  a  PGW..M  balance  will  generally  be  neces sary  when  the  balance 
does  not  perform  as  expected.  The  balances  are  not  user-serviceable.  For 
Service  Information,  see  section  20.0  and  contact  A dam  equipment  or  your 
supplier.  
Problems usually fall into one of the following cat egories: 
 
User Problems:    
The  user  is  asking  the  balance  for  something  it  can not  do  or  is  confused  by 
the  modes  and  functions  of  a  balance.    It  is  also  p ossible  the  user  has  set  a 
parameter  that  has  affected  the  balance  operation.    Resetting  the  parameter 
to a normal value will restore operation.    
						

							 
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Mechanical Problems:  
The  balances  consist  of  complicated  and  fragile  mec hanical  devices.    They 
can be damaged by placing a weight on it which is t oo high for the balance or 
by dropping the balance or occasionally shipping it  without taking care.   The 
most fragile parts are the flexures.   Dust, dirt,  spills and other foreign objects 
in the balance can also cause problems.    
Electronic Problems:  
These  are  the  rarest  of  the  problems  affecting  bala nces.    If  an  electronic 
problem  is  suspected  make  sure  the  mechanical  probl ems  that  can  cause 
similar  symptoms  have  been  eliminated  before  attemp ting  electronic  repairs.  
With  the  exception  of  cables  most  electronic  repair s  are  solved  by  board 
replacement.    
The  table  that  follows  is  a  guide  of  common  problem s  and  their  solutions.  
Note  that  many  problems  may  have  multiple  solutions   and  there  may  be 
problems  found  that  are  not  listed  in  the  table.    F or  Service  Information, 
contact Adam Equipment or your supplier.  
						

							 
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BALANCE DOES NOT FUNCTION  
Problems  Possible causes  Suggestions 
The balance is dead  
when power is applied  Power supply failure  Check adapter is working 
Check adapter is correct for the balance  
Normal adapter is 15VDC, 800mA. 
*Power supply circuit board failure 
*Short circuit on any circuit board 
The display does not  
turn on but the 
calibration motor 
moves when power is 
applied  Power is getting to 
balance, display is not 
working 
*Display cables may be faulty  
*Display module failure 
The display stays on  
the initial test screen 
when power is applied.  
Calibration weight 
motor is on.  Unstable balance  
Balance not working  
correct   
Power supply 
*Check if balance is stable by using  
service menu and view A/D values  
Put draught shield over pan 
Check power supplies 
BALANCE WORKS BUT IS NOT STABLE 
Balance is unstable by  
a few divisions 
Noise or vibration 
from environment  
Friction in mechanics  Check the balance is positioned  
correctly to avoid vibration, wind or air 
movement, it is on a solid table, It is not 
near sources of heat or cool air,  
Check balance with weights if problem  
occurs when sample is used.  Static 
electricity on the samples can cause 
drifting and instability.  
Check the area around the weighing  
pan for hair, dust, obstructions under 
the pan,   
*A complete inspection of the  
mechanics to look for sources of friction 
may be needed.  
						

							 
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Balance is very  
unstable and does not 
weigh correctly 
Mechanical problems   
Balance programming   
 
Electronic problems  *A complete inspection of the  
mechanics to look for sources of friction.
 
*Verify the A/D is also unstable.  If the  
A/D is OK then suspect the 
programming of the balance.  Reset 
parameters, check linearity and redo the 
calibration.  
Some electronic problems can also  
cause this.  But all mechanical problems 
must be resolved first.   
  
BALANCE IS NOT ACCURATE 
  
You must have accurate and trusted weights to test 
a balance.  If you suspect that the 
balance is not accurate then you must know your wei ghts are accurate.  A balance 
calibrated using a bag of flour is not accurate eve n if it works OK otherwise. 
 
Balance is not accurate Repeatability 
 
Eccentric loading   
 
Linearity   Verify the balance shows the same  
value when the same mass is placed on 
the centre of the pan for a few tests.  
Verify the balance shows the same  
reading (within a tolerance depending 
upon the model) when a mass is placed 
at positions around the pan.  
Verify the balance is acceptable  
throughout the weighing range.  The 
balance must give acceptable readings 
from low weights up to the capacity.   
Poor Repeatability  Usually a mechanical 
problem. Inspect the area around the pan for hair,  
dust or other obstructions,    
*Inspection of the mechanics may be  
needed for any possible problems.