Adam Equipment CBC SERIES User manual

@Adam Equipment Company 2005
Adam Equipment
CBC SERIES
SERVICE MANUAL
ADAM EQUIPMENT CO. LTD.
p.n. 4329, Rev. A3, January 2005

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CONTENTS
1.0 INTRODUCTION........................................................................................................... 4
2.0 TROUBLE SHOOTING GUIDE ..................................................................................... 5
3.0 ERROR CODES............................................................................................................ 6
4.0 CBC DESCRIPTION ..................................................................................................... 7
5.0 CBC PARAMETERS AND CALIBRATION (VER. 1.2- 2.02) ......................................... 8
5.1 CBC PARAMETERS (VER. 1.2- 2.02)....................................................................... 8
5.2 CBC CALIBRATION (VER. 1.2- 2.02)........................................................................ 9
6.0 FACTORY PARAMETERS (VERSION 1.1-1.8 TO 1.2- 2.02) ..................................... 10
7.0 TWO POINT FACTORY CALIBRATION ..................................................................... 10
8.0 LOAD CELL DAMAGE ................................................................................................ 11
9.0 CBC RS-232 INTERFACE........................................................................................... 14
10.0 SCHEMATICS............................................................................................................. 16

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1.0 INTRODUCTION
The CBC series of scales are general purpose counting scales.
Refer to the Operators Manual for details of operation.
This manual will cover details of calibration and troubleshooting.
If you have a problem with the scales that is not directly addressed by this manual then
contact your dealer or Adam Equipment for more assistance.
In order to supply further assistance we will need the following information:
Name of your company:
Contact Name:
Contact telephone, e-mail, fax or other methods:
Model number of the scales:
Serial number:
Software revision number (displayed when power is first turned on):
Brief description of the problem:
Include any recent history of the scale. For example-
Has it been working since it’s delivered
Water entered
Damaged from a fire
Electrical Storms in the area
Dropped on the floor, etc.

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2.0 TROUBLE SHOOTING GUIDE
PROBLEM POSSIBLE CAUSE
Display is blank Power Switch is faulty or not turned on
No turn on test Battery is faulty or not charged
Power supply is incorrect
Display all zeros after turn on Pan not installed
or E6 is displayed Unstable weight
Load cell damaged
Electronics faulty
‘- - - - -‘ appears on display Maximum capacity exceeded
Load Cell damaged
Electronics is faulty
Display is unstable Drafts or air currents
Obstruction under pan
Sample is moving (animal weighing)
Vibrations through table
Temperature changed dramatically
Electronics faulty
Battery low
Weight value incorrect Calibration error, Recalibrate
Unit calibrated with inaccurate weight
Balance not level
Obstruction between sample and cover
Wrong unit of weight displayed
Cannot use Full Capacity Over-load Stops hitting pan support or hitting
bottom of load cell
Electronics faulty
Parameters set incorrectly
Load Cell Damaged
Not Linear Overload stops hitting too soon
Faulty Factory calibration
Off Centre Loading error Overload Stops not correct
Obstruction under pan
Battery will not charge Charging circuit failure
Battery Failure
Incorrect adapter (below 800 mA)
Processor failure

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3.0 ERROR CODES
ERROR CODE DESCRIPTION POSSIBLE CAUSES

Initial Zero is greater than allowed
(typically 4% of the maximum
capacity) when power is turned on
or when the [Zero] key is pressed,
Weight is on the pan when
turning the scale on.
Excessive weight on the pan
when zeroing the scale.
Improper calibration of the
scale.
Damaged load cell.
Damaged Electronics.

Keyboard error. Improper operation of the scale.

A/D count is not correct when
turning the scale on. Platform is not installed.
Load cell is damaged.
Electronics is damaged.
 or 

or  for
some softwares 
Calibration error. Improper calibration (should be
within + 10% of the factory
calibration). The old calibration
data will be retained until the
calibration process is complete.

Scale is unstable. There is vibration or draft
making the scale unstable.
Electronics may be damaged.

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4.0 CBC DESCRIPTION
The CBC scales have an enclosure with all components mounted within it. To gain access to
the components remove the 4 screws securing the cover to the base.
The basic unit consists of:
Base
Load Cell frame
Power switch
Main PCB assembly
Battery
Display PCB assembly
Keypad
All models of CBC are similar except the selection of load cells and the program.
The main circuit board is the same as used in the CBW scales. Normally if a problem is
found with a circuit board the most cost effective method of solving the problem is to replace
the circuit board.
Schematics are attached in order to complete the documentation. However it is rare that the
problem due to a faulty component on the PCB is traced by a user.
The main PCB assembly includes:
A/D converter (AU1),
Microprocessor (DU1) and
Power supply/battery charger circuits (DU5, T2).

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5.0 CBC PARAMETERS AND CALIBRATION (VER. 1.2- 2.02)
5.1 CBC PARAMETERS (VER. 1.2- 2.02)
To set the parameters it is necessary to enter a secure menu by entering a password number
when requested.
To enter the parameter menus press [Tare] once, during the initial counting of the display
after the power is turned on.
The “Weight” display will show "  " requesting the password number to be entered. The
default password is "  " but other numbers can be set using the parameter menus. Press
the [0] key four times.
Press the [Tare] key.
The Parameter menu has 6 functions that can be accessed using the [U. Wt./Units] key to
cycle through the choices. The “Weight” display will show the name of the functions. To
enter a function, press [Tare].
At any time press the [Zero] key to return to weighing.
Weight Display Description
 See the Calibration section for details.
 Sets the scale increment. Press the [U. Wt./Units] key to cycle
through the options (1,2,5,10). Press [Tare] to accept the selection.
 Displays the A/D counts. Press [Tare] to return to menu.
 Press the [U. Wt./Units] key to show the options. Select automatic
accumulation ( ) when the scale becomes stable, Manual
accumulation () or Continuous (), the user must press the
[M+] key to accumulate data.
 



 Press [U. Wt./Units] to show the options for the auto-
zero range.
The value can be set to 0.5d, 1d, 2d or 4d. This is normally set to 1d
but can be increased to force the scale to zero if it is likely to have
small amounts of material spilled on the platform while in use.
 Set a new password number. Display will show " "
Enter the new password number then press the [Tare] key.
Display will change to " ", Enter the password again and press
[Tare] again.
The display will show "" to show the new password has been
accepted.
Record the new password number in a secure place.
 This is used to set the speed at which the scale will run the ADC. The
settings are 7.5, 15, 30 and 60. The slowest setting is 7.5 and the
fastest is 60.

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5.2 CBC CALIBRATION (VER. 1.2- 2.02)
The CBC scales calibrate using metric weights and the CBCa scales use either metric or
pound weights, depending on the weighing unit in use before calibration.
The scales will display a value of the weight to be used for calibration. However, you can
enter a different value if desired.
When the parameter menu shows "  " press [Tare].
The display will show "  " requesting to remove all weights from the platform.
Press the [Tare] key to set the zero point.
It will then show the calibration weight suggested as a whole number, for example:
“” “” “”
Either put this weight on the platform after the stable symbol is on or enter the value desired
and then press [Tare]. The display will show:
"" “” “”
Place the weight on the platform and press [Tare] again.
At all times the scale should be stable before pressing the [Tare] key to accept a weight. The
stability indicator will turn on to show the value is stable.
CBCa scales will also have the lb or kg indicator on, to show the unit of the weight
requested. If the scale was in pounds before starting the calibration, the weights requested
will be in pound values or if the scale was weighing in kilograms then metric weights will be
requested.
When calibration is done the display will show the counting from 0 to 9 and then return to
normal operation.
If an error message “  ” or “  ” is displayed, then re-check the calibration and repeat
it, if necessary.

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Suggested Calibration weights for CBC Series:
CBC SERIES
Model # CBC 3 CBC 6 CBC 15 CBC 30 CBC 45
2000g 5000 g 10 kg 20 kg 30 kg
Suggested Calibration Weights for CBCa Series:
After calibration, the scale should be checked whether the calibration and linearity is correct.
If necessary repeat calibration, ensure that the scale is stable before accepting any weight.
6.0 FACTORY PARAMETERS (VERSION 1.1-1.8 TO 1.2- 2.02)
To set the factory parameters after fitting a new PCB or when corruption is evident it is
necessary to enter a secure menu. This is done by entering the factory password number
when requested.
To enter the factory parameter menus press the [Tare] key during the initial counting of the
display after power turned on. The Weight Display will show "   " requesting the
password number to be entered.
The factory password is "  " and will over ride any other password they may have been
programmed and possibly forgotten.
Press the "  " key four times. The display will show "  ", Press the [Tare] key.
The Factory Parameter menu has the same 6 functions as described previously that can be
accessed by using the [Unit Wt.]key ([Lb/kg] key on CBCa series) to scroll through and the
[Tare] key to enter.
7.0 TWO POINT FACTORY CALIBRATION
When the parameter menu shows "  " press the [Tare] key.
The display will then show "  " to request all weight be removed from the platform.
Press the [Tare] key to set the zero point.
The display will then show the first calibration weight needed. It will be one third of the scale
capacity.
CBCa SERIES
Model # CBC 6a CBC 12a CBC 35a CBC 65a CBC 100a
5 Ib / 2 kg 10 lb / 5 kg 30 lb / 10 kg 50 lb / 20kg 100 lb / 30 kg