Adam Equipment PGW Precision Balances PGWMrevB1 User Manual
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© Adam Equipment Company 2011 29 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.
© Adam Equipment Company 2011 30 · 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:
© Adam Equipment Company 2011 31 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
© Adam Equipment Company 2011 32 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
© Adam Equipment Company 2011 33 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.
© Adam Equipment Company 2011 34 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.
© Adam Equipment Company 2011 35 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.
© Adam Equipment Company 2011 36 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.
© Adam Equipment Company 2011 37 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.
© Adam Equipment Company 2011 38 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.