Adam Equipment CBD Series User manual

Adam Equipment

CBD SERIES

SERVICE MANUAL

ADAM EQUIPMENT CO. LTD.

P.N. 7951, Rev. A1, March 2007

@Adam Equipment Company 2007

CONTENTS

1.0 INTRODUCTION............................................................................................................2

2.0 TROUBLE SHOOTING GUIDE......................................................................................3

3.0 ERROR CODES ............................................................................................................4

4.0 CBD DESCRIPTION......................................................................................................4

5.0 SETTING UP THE REMOTE SCALE ............................................................................5

6.0 USER PARAMETERS ...................................................................................................7

7.0 USER CALIBRATION....................................................................................................9

8.0 TECHNICAL PARAMETERS.......................................................................................10

9.0 LOAD CELL DAMAGE.................................................................................................12

10.0 REPLACEMENT PARTS AND ACCESSORIES..........................................................15

11.0 SCHEMATICS..............................................................................................................15

1.0 INTRODUCTION

The CBD 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 provide further assistance, the supplier will need the following

information which should be kept ready:

A. Details of your company

-Name of your company:

-Contact person’s name:

-Contact telephone, e-mail,

fax or any other methods:

B. Details of the unit purchased

(This part of information should always be available for any future

correspondence. We suggest you to fill in this form as soon as the unit is

received and keep a print-out in your record for ready reference.)

Model name of the scale:

CBD_____

Serial number of the unit:

Software revision number

(Displayed when power is first turned on):

Date of Purchase:

Name of the supplier and place:

C. Brief description of the problem

Include any recent history of the unit. For example:

-Has it been working since it’s delivered

-Has it been in contact with water

-Damaged from a fire

-Electrical Storms in the area

-Dropped on the floor, etc.

@Adam Equipment Company 2007

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)

Processorfailure

@Adam Equipment Company 2007

3.0 ERROR CODES

ERROR CODE DESCRIPTION POSSIBLE CAUSES

Err 4 Initial Zero is greater than

the permissible value

(typically 4% of maximum

capacity) when power is

turned on or when the

[Zero] key is pressed,

Weight 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.

Err5 Keyboard error. Improper operation of the

scale.

Err6 A/D count is not correct

when turning the scale on. Platform is not installed.

Load cell may be damaged.

Electronics may be damaged.

FAILHor FAILL Calibration error Improper calibration.

If the problem persists

contact your dealer or Adam

Equipment for assistance.

4.0 CBD DESCRIPTION

The CBD 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.

@Adam Equipment Company 2007

The basic unit consists of:

9Base

9Load Cell frame

9Power switch

9Main PCB assembly

9Battery

9Display PCB assembly

9Keypad

All models of CBD are similar except the selection of load cells and the program.

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:

9A/D converter (AU1),

9Microprocessor (DU1) and

9Power supply/battery charger circuits (DU5, T2).

5.0 SETTING UP THE REMOTE SCALE

The CBD Series can be connected to any size of load cell type weighing base

via the Remote scale port on the right side of the scale case. Ensure you have

the correct base for the scale as each is matched for calibration.

Place the remote scale platform in the position where it is to be used. Level the

scale by adjusting the four feet. If fitted with a spirit level then it should be

adjusted such that the bubble is in the centre.

Press [Local/Rem] and test weighing performance.

REMOTE SCALE CONNECTION

The cable for the load cell goes to a 9 pin D-subminiature plug connector with

the following connections:

@Adam Equipment Company 2007

Pin numbers Connection

Pins 1,2 - Excitation (0v)

Pins 4,5 + Excitation (+5v)

Pin 7 + Signal

Pin 8 - Signal

(The sense wires connections of a six wire load cell are not used but can be

connected to the respective Excitation pins).

REMOTE SCALE SET UP

The remote scale should set for a realistic resolution with respect to the input

provided by the load cell/s.

If a single 2mV/V load cell is fitted and more than 60% of the load cell is used for

full capacity then the high output of >6mV span makes it possible to set a high

resolution.

If this criterion is met then the remote scale can be set to a high resolution with a

maximum of 1:30,000, i.e. 300kg x 10g.

It will also be possible to sample on the remote scale with the same accuracy as

the Local.

Where more than one load cell is fitted or the total load cell capacity is not

utilised then a reduced resolution should be selected in the remote scale

technical set up. For example, if a system uses four 2mV/V 1000kg load cells for

a scale of 1000kg capacity then the span output at full scale will be only 2.5mV.

In this situation the resolution should be reduced to give a good number of ADC

counts per displayed division. ie. Set to 1:5000 or 1000kg x 0.2kg.

Setting a high resolution without providing a good input to the remote scale ADC

will not give better accuracy and may make the scale difficult to meet

performance specification.

For best performance ensure a minimum of 0.1µV/d.

@Adam Equipment Company 2007

6.0 USER PARAMETERS

Enter the User Parameters section by pressing the [Pst] key during the self-test

when the power is turned on. This will allow the user to set the way he wants the

scale to work by choosing specific values from some options.

Press the [U.Wt./Units] key to scroll through the other parameters. To enter any

parameter, press the [Print] key.

Press [U.Wt./Units] to scroll through the sub-parameters. To see the earlier

setting, press the [Print] key. To change and scroll through the other available

settings, press [U.Wt.]. To choose the desired setting and thereby go back to

the sub-parameter, press the [Print] key.

To return to the parameter, press the [Tare/Zero] key.

PARA-

METER SUB-

PARAMETER DISPLAYS AND SETTINGS

“bEEP"“ "oFF"” Beeper is set to off

“bEEP"” "onIn"” Beeper is set to on

between limits

bEEP

“bEEP” “"on oUt”” Beeper is set to on

outside limits (>0)

“LitE"” “"oFF"”

Backlight is set to off

“LitE"” "on"” Set to on at all times

“LitE"” "AUt" Set to work automatically

when a weight is placed

on the scale or a key is

pressed.

“UnIt” ”KG/Lb”

Kg/Lb both are enabled

F1oFF

UnIt

”UnIt” “KiLo” Kg only is enabled

@Adam Equipment Company 2007

”UnIt” “Lb” Lb only is enabled

Print AuoFF Prints only wh

the Auto-

Accumulation is

set to off.

Auon Prints only when

the Auto-

Accumulation is

set to on.

PCont Sets the RS-232 interface

to print continuously and

the accumulation function

is disabled.

PModE

SErrE Sets the RS-232 to print

continuously the weight

only.

PbAUd b 600

b 1200

b 2400

b 4800

b 9600

Sets the required baud

rate (speed for the RS-

232 communications).

Default rate is 4800.

F2Prt

PAritY 8 n 1

7 E 1

7 o 1

8 data bits, no parity

7 data bits, even parity

7 data bits, odd parity

U id “Uid”

“ Abc234”

“ “

Shows the current user ID (if any).

Enter a new User ID as described in the Description

under the PLU section. The ID can be alpha-

numeric but is limited to 6 characters.

SCid “Scid”

“ Abc234”

“ “

Shows the current scale ID (if any).

Enter a new Scale ID as described in the

Description under the PLU section. The ID can be

alpha-numeric but is limited to 6 characters.

tECH Allows access to the Technical parameters using a

password. Not normally accessed by user.

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