KERN CPB 15K5M User manual

KERN & Sohn GmbH

Ziegelei 1

D-72336 Balingen-Frommern

E-Mail: [email protected]

Tel: 0049-[0]7433- 9933-0

Fax: 0049-[0]7433-9933-149

Internet: www.kern-sohn.com

GB

Service Manual

Electronic Counting Balance

Page 2

KERN CPB

Software rev.: 3.02 & above

Version 2.1 11/2007

CPB-SH-e-0721 2

CONTENTS

1.0 INTRODUCTION ..................................................................................................3

2.0 SPECIFICATIONS................................................................................................4

2.0 TROUBLESHOOTING..........................................................................................5

3.0 INSTALLATION ....................................................................................................6

3.1 GENERAL INSTALLATION...............................................................................6

3.2 PREPARATION FOR USE................................................................................6

4.0 SERVICE PARAMETERS.....................................................................................8

4.1 USING “0000” TO ENTER THE CALIBRATION PARAMETER..........................8

4.1.1 F1 - CALIBRATION.........................................................................................9

4.1.2 F2 - PIN FOR CALIBRATION.........................................................................9

4.2 USING “2006” TO ENTER THE SERVICE PARAMETERS .............................11

4.2.1 F1 - CALIBRATION.......................................................................................12

4.2.2 F2 - RESOLUTION.......................................................................................12

4.2.3 F3 - CAPACITY ............................................................................................12

4.2.4 F4 - INITIAL ZERO RANGE..........................................................................13

4.2.5 F5 - RE-ZERO RANGE ................................................................................13

4.2.6 F6 - SUCCESSIVE TARE.............................................................................13

4,2.7 F7 - A/D COUNT...........................................................................................14

4.2.8 F8 - ZERO....................................................................................................14

4.2.9 F9 - PIN........................................................................................................14

4.2.10 F10 - LVD MODE..........................................................................................15

4.3 WEIGHING UNITS [KG / G]................................................................................15

5.0 WIRING DIAGRAM.............................................................................................16

6.0 MECHANICAL ASSEMBLY................................................................................17

7.0 FRONT DISPLAY SCHEMATIC .........................................................................18

7.1 FRONT DISPLAY ASSEMBLY........................................................................19

8.0 MAIN PCB SCHEMATIC.....................................................................................20

8.1 MAIN PCB ASSEMBLY..................................................................................21

1.0 INTRODUCTION

• The CPB series of scales provide an accurate, fast and versatile counting

and check-weighing scales.

• CPB scales are kilogram only scales.

EC type approved scales are limited to lower resolution operation,

however the counting abilities still use the same internal resolution.

• They all have stainless steel weighing platforms on an ABS base

assembly.

• All scales available with RS-232 interface and real time clock (RTC).

• All scales have sealed keypad with colour coded membrane switches and

there are three large, easy to read liquid crystal type displays (LCD). The

LCD’s are supplied with a backlight.

• The scales include automatic zero tracking, audible alarm for pre-set

weights, automatic tare, pre-set tare, an accumulation facility that allows

the count to be stored and recalled as an accumulated total and an bi-

directional RS-232 interface for communicating with a PC or printer.

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2.0 SPECIFICATIONS

Approved Series CPB-M SERIES

Model # CPB 3K1M CPB 6K2M CPB 15K5M CPB 30K10M

Maximum

Capacity 3000 g 6000 g 15 kg 30 kg

Readability 1 g 2 g 0.005 kg (5g) 0.01 kg (10g)

Tare Range -3000 g -6000 g -15 kg -30 kg

Repeatability

(Std Dev) 1 g 2 g 0.005 kg (5g) 0.01 kg (10g)

Linearity ± 2 g 4 g 0.01 kg (10g) 0.02 kg (20g)

Non Approved Series CPB SERIES

Model # CPB 3K0.1 CPB 6K0.2 CPB 15K0.5 CPB 30K1

Maximum

Capacity 3000 g 6000 g 15 kg 30 kg

Readability 0.1 g 0.2 g 0.5g 1g

Tare Range -3000 g -6000 g -15 kg -30 kg

Repeatability

(Std Dev) 0.1 g 0.2 g 0.5g 1g

Linearity ± 0.4 g 0.8 g 1.5 g 3 g

Common Specifications

Interface RS-232 bi-directional interface

Stabilisation Time 2 Seconds typical

Operating

Temperature 0°C - 40°C

32°F - 104°F

Power supply 230 VAC 50/60 Hz.

120 VAC available.

Battery Internal rechargeable battery

(~50 hours operation)

Calibration External

Not available on EC approved units (locked)

Display 3 x 6 digits LCD digital displays

Balance Housing ABS Plastic, Stainless Steel platform

Pan Size 225 x 275mm

8.9” x 10.8”

Overall Dimensions

(wxdxh) 315 x 355 x 110mm

12.4” x 14” x 4.3”

Net Weight 4.1 kg / 9 lb

Applications Counting Scales

Functions Parts counting, weighing, accumulating memory,

pre-set count with alarm

Interface RS-232 bi-directional interface

Date/Time Real Time Clock (RTC),

To print date and time information.

(Dates in year/month/day, day/month/year or

month/day/year formats Battery backed)

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2.0 TROUBLESHOOTING

1. Unit does not

turn on Check whether the scale is plugged into the power supply properly.

Check the operation of the charging circuit.

Check whether the battery is charged- LED should turn to green

from red.

Check the adapter output.

.

2. The scale

weighs but is

unstable

Air drafts or vibration or unstable table.

Pan rubbing against case or not installed correctly.

Scale not installed properly.

Improper connections on ADC circuit.

3. Scale shows

wrong weight Scale not installed correctly.

Check the Calibration.

To check whether a part of product weighed is trapped between

the pan and the scale.

Incorrect adjustment of the mechanical stops.

4. An error “E4”

displays on

the screen

Load cell damage.

Scale not installed properly.

Incorrect adjustment of the mechanical stops.

Factory calibration has been tampered with- check the ADC counts

and re-calibrate.

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3.0 INSTALLATION

3.1 GENERAL INSTALLATION

The scales should not be placed in a location that will reduce the accuracy.

Avoid extremes of temperature. Do not place in direct sunlight or near air conditioning

vents.

Avoid unsuitable tables. The table or floor must be rigid and not vibrate.

Avoid unstable power sources. Do not use near large users of electricity such as

welding equipment or large motors.

Do not place near vibrating machinery.

Avoid high humidity that might cause condensation. Avoid direct contact with water. Do

not spray or immerse the scales in water.

Avoid air movement such as from fans or opening doors. Do not place near open

windows or air-conditioning vents.

Keep the scales clean. Do not stack material on the scales when they are not in use.

3.2 PREPARATION FOR USE

The scales come with a stainless steel platform, packed separately.

Place the platform in the receptacles on the top cover.

Do not press with excessive force as that could damage the load cell inside.

Level the scale by adjusting the four feet. The scale should be adjusted such that the

bubble in the spirit level is in the centre of the level and the scale is supported by all four

feet.

Turn the power ON using the switch located on the right side of the base.

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The unit will display the software revision number in the Weight window and count

down to zero while performing a self-test.

When ready all three displays will show zero.

Refer to the CPB user manual for detailed operating instructions.

4.0 SERVICE PARAMETERS

• Place your balance upside down

• Remove seal

• For verified balances, the jumper is on a pin

• For adjustment the jumper must be set on both pins

Position jumper for adjustment

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Position

of seal

Bottom of the balance

4.1 USING “0000” TO ENTER THE CALIBRATION PARAMETER

After the jumper has been placed in the position shown, apply power to the scale.

The display will ask for a code number, “Pn” on the Weight Display.

Enter the number “0000” then press [Tare]. The display will show “F1” “CAL”. To enter

the calibration press [Tare] and to skip the calibration, press . “F2” “Pin” will be

displayed.

NOTE: If the PIN number has been changed by other users, the correct Pin number will

be required in place of 0000.

4.1.1 F1 - CALIBRATION

To enter the calibration parameter, press the [Tare] key when “F1” “CAL” is displayed.

The Weight display will instruct you to remove any weight from the scale, “UnloAd”

Press the [Tare] key. The displays will ask you to place the calibration weight on the

scale: “LoAd” “06” “kilo6”

NOTE: The CPB-M series should be calibrated with the full capacity weight. That is for

CPB 6K2M, use 6 kg as calibration weight.

Add the suggested calibration weight as displayed or press the key to clear the

value and enter another value of weight. To add this value to the platform, wait for

stability then press the [Tare] key.

The display will show “SPAn” “PASS” if the calibration is OK. Or it will show “SPAn” “FAIL”

if calibration could not be completed correctly.

The display will show “JP On”. Remove the calibration mass.

Remove the jumper and the scale will run a self-test and return to normal operation.

4.1.2 F2 - PIN FOR CALIBRATION

This parameter allows changing of the PIN number to gain access to calibration.

To set the PIN, press the [Tare] key when “F2” “Pin” is displayed.

The display will show “Pin 1”

Enter the new Pin number. Press the [Tare] key to accept.

The display will show “Pin 2”

Enter the new Pin number a second time. Press the [Tare] key to accept.

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The display will show “dOnE” if the number was accepted or “FAiL” if the numbers were

not the same.

The scale returns to the parameter menu displaying “F2” “Pin”.

Turn the power off, remove the jumper and restart the scale. The new settings are now

in operation.

4.2 USING “2006” TO ENTER THE SERVICE PARAMETERS

After the jumper has been placed in the position shown, apply power to the scale.

The display will ask for a code number, “Pn” on the Weight Display.

Enter the number 2006 when “Pn” is displayed and then press [Tare].

The displays will show the first parameter “F1” “CAL”. To scroll through other

parameters press the key.

Press the [Tare] key to enter a parameter.

To exit a parameter, press the key.

The Weight Display window will show the parameter number and the Piece Weight

window will show the word describing the function.

When a parameter is entered by pressing the [Tare] key, the displays will guide you

through the parameter selected and the options available.

The parameters available are:

F1 CAL To enter the Calibration

F2 rES Resolution selection, not valid for CPB-M units

F3 CAPA Select Capacity

F4 init ZEro Initial Zero Range

F5 rE ZEro Re-Zero Range

F6 SCSivE tArE Successive Tare Enable

F7 Ad Count Display the A/D counts

F8 ZEro Set zero method.

F9 Pin Set new PIN number

F10 LVd ModE Set low voltage detect mode

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4.2.1 F1 - CALIBRATION

To enter the calibration parameter, press the [Tare] key when “F1” is displayed.

The display will instruct you to remove any weight from the scale by displaying “UnloAd”

Press the [Tare] key.

The display will tell you to add the calibration weight to the scale: “LoAd 1” “ 05”

“kiLo5”

Add the weight shown or press the key to clear the value and enter another value

of weight. Wait for the stability indicator and then press the [Tare] key.

The display will show “SPAn” “PASS” if the calibration is OK or it will show “SPAn” “FAIL”

if calibration could not be completed correctly.

The display will show “JP On”. Remove the calibration weight.

Remove the jumper and the scale will run a self-test and return to normal operation.

4.2.2 F2 - RESOLUTION

This function is not active on the CPB-M series.

4.2.3 F3 - CAPACITY

To enter this parameter, press the [Tare] key when “F3” is shown.

The display will show the current capacity in 3, 6, 15 or 30 kilograms.

Press the key to change the value.

Press [Tare] to accept the displayed value.

NOTE: The scale must be originally built for the capacity selected. The 3kg unit

uses the 5kg load cells, 6kg unit uses 10kg load cells, the 15kg unit uses 20kg load

cells and the 30kg unit uses 35kg load cells.

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4.2.4 F4 - INITIAL ZERO RANGE

To enter this parameter, press the [Tare] key when “F4” is shown.

The display will show the current initial zero range.

Press the key to change the value and press [Tare] to accept the value.

NOTE: Only 10% is allowed for the CPB-M scales.

4.2.5 F5 - RE-ZERO RANGE

To enter this parameter, press the [Tare] key when “F5” is shown.

The display will show the current re-zero range.

Press the key to change the value and press [Tare] to accept the value.

NOTE: Only 2% is allowed for the CPB-M scales.

4.2.6 F6 - SUCCESSIVE TARE

To enter this parameter, press the [Tare] key when “F6” is shown.

The display will show if the successive tare is on or off.

Press the key to change the value.

Press [Tare] to accept the displayed value.

NOTE: Either option is allowed for the CPB-M scales.

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4,2.7 F7 - A/D COUNT

To enter this parameter, press the [Tare] key when “F7” is shown.

This parameter allows you to view the A/D counts from the internal A/D converter. This

can be an aid to service.

Press the [Tare] key to return to the PARAMETER menu.

Press the key to return to normal weighing.

Typical value at zero is 30,000-90,000 (approx.)

Typical value at full capacity is 500,000 (approx.)

4.2.8 F8 - ZERO

The scale can be selected to use a normal method to determine zero, “Mode 1” or an

alternative method “Mode 2”. For all CPB-M scales set this option to “Mode 1”.

To enter this parameter, press the [Tare] key when “F8” is shown.

The display will show the selected zero mode.

Press the key to change the value.

Press [Tare] to accept “Mode 1”.

4.2.9 F9 - PIN

To change the user Pin number to gain access to the Service Parameters.

To enter this parameter, press the [Tare] key when “F9” is shown.

The display will show “Pin 1”

Enter the new Pin number. Press the [Tare] key to accept.

CPB-SH-e-0721 14

The display will show “Pin 2”

Enter the new Pin number a second time. Press the [Tare] key to accept.

The display will show “dOnE” if the number was accepted or “FAiL” if the numbers were

not the same.

The scale returns to the parameter menu.

4.2.10 F10 - LVD MODE

It stands for Low Voltage Detect mode. The Low voltage detection can be enabled or

disabled.

To enter this parameter, press the [Tare] key when “F10” is shown.

The display will show if the LVD is “on” or “oFF”.

Press the key to change the value.

Press [Tare] to accept “on”.

NOTE: Only “LVD” “on” is allowed for the CPB-M scales.

Turn the power off, remove the jumper and restart the scale. The new settings are now

in operation.

4.3 WEIGHING UNITS [kg / g]

The current software of CPB was standardised to weigh in [kg].

There is a function to enable the scale to weigh in [g].

The scale has to be opened and a connecting jumper has to be fitted to “JTAG” pins 1

and 2 on the main board to enable the [g] display.

NOTE: The selection between both units is not possible for the CPB-M scales.

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5.0 WIRING DIAGRAM

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6.0 MECHANICAL ASSEMBLY

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7.0 FRONT DISPLAY SCHEMATIC

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7.1 FRONT DISPLAY ASSEMBLY

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8.0 MAIN PCB SCHEMATIC

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