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KERN PLJ Series User Manual

KERN PLJ Series
84 pages
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KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
email: info@kern-sohn.com
Phone: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
Operating Manual
Analytical and precision balances
KERN ALJ/ALS/PLJ/PLS
Version 4.1
2017-07
GB
ALJ/ALS/PLJ/PLS-BA-e-1741

Table of Contents

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KERN PLJ Series Specifications

General IconGeneral
Weighing plate materialstainless steel
Minimum part weight at piece counting0.1g - 2g (depending on model)
Stabilisation time under laboratory conditions2 seconds
Permissible ambient temperature10 °C - 40 °C
InterfaceRS-232
Unitsg, kg, lb, oz

Summary

1 Technical Data

Weighing Range and Readability

Specifies max weighing capacity and measurement precision for different models.

Stabilization Time and Warm-up

Details time needed for stable readings and initial device readiness.

Operating Conditions and Power

Outlines temperature, humidity, and electrical supply requirements.

Dimensions and Weight

Provides physical size, windshield, and net weight specifications.

2 Declaration of Conformity

3 Device Overview

3.1 Components

Identifies and lists the physical parts of the balance models.

3.2 Operating Elements

Describes the function of the display and keyboard controls, including overview and layout.

4 Basic Information (General)

4.1 Proper Use

Guidelines for intended and correct operation of the weighing balance.

4.2 Improper Use

Warnings against misusing the balance, potential damages, and invalid warranty.

4.3 Warranty

Conditions under which warranty claims become void.

4.4 Monitoring of Test Resources

Advice on regular checks of balance performance and test weights.

5 Basic Safety Precautions

5.1 Read Operation Manual

Emphasizes careful reading of the manual before setup and commissioning.

5.2 Personnel Training

States that only trained personnel should operate and maintain the appliance.

6 Transportation & Storage

6.1 Testing Upon Acceptance

Instructions for checking packaging and the appliance for damage upon receipt.

6.2 Packaging and Return Transport

Guidelines for keeping original packaging and proper procedures for returning the unit.

7 Unpacking, Setup and Commissioning

7.1 Installation Site Selection

Criteria for choosing an appropriate location for accurate weighing results.

7.2 Unpacking and Placing

Steps for removing the balance from packaging and setting it up at the workstation.

7.3 Mains Connection

Instructions for connecting the balance to the power supply, including voltage checks.

7.4 Connect and Switch-on Power Supply

Steps for connecting the power and initiating the balance's self-test.

7.5 Rechargeable Battery Operation

Information on battery usage, operating time, and charging.

7.6 Peripheral Device Connection

Guidelines for connecting external devices like printers or PCs.

8 Adjustment

8.1 Models with External Weight

Procedures for adjusting models using external calibration weights.

8.2 Models with Internal Weight

Instructions for models with internal adjustment mechanisms (ALJ/PLJ).

8.3 Verification

Information on balance verification requirements and procedures according to EU directives.

9 Basic Operation

Start-up and Switching Off

Procedures for powering the balance on, entering operation, and powering down.

Simple Weighing

Basic steps for performing a standard weighing operation.

Taring Function

How to use the tare function to zero the balance with a container.

9.1 Underfloor Weighing

Instructions for weighing objects using the underfloor hook.

10 User Menu (Settings)

Accessing the User Menu

How to enter the user menu for settings adjustment.

Selecting Menu Items

Navigating through menu options using the balance keys.

Changing and Saving Settings

Procedures for modifying and confirming user menu settings.

Exiting the Menu

How to return from the user menu to the weighing mode.

10.1 Weighing Unit

How to change the displayed unit of weight (e.g., grams, ounces).

10.2 Data Output Type

Configuring the balance for continuous output or manual printing.

10.3 Baud Rate

Setting the communication speed for data transfer.

10.4 Auto Zero Function

Enabling/disabling automatic zero point correction for stability.

10.5 Filter Settings

Adjusting the balance's response filter for different environmental conditions.

10.6 Standstill Control

Configuring how the balance detects a stable weighing value.

10.7 Display Contrast

Adjusting the brightness and contrast of the balance display.

10.8 Display Background Illumination

Controlling the backlight of the balance display (on, off, auto).

10.9 Automatic Switch-Off

Setting the timeout period for automatic power-off in stand-by mode.

11 User Menu (Operating Modes)

11.1 Parts Counting

Detailed instructions for performing parts counting operations.

11.2 Density Determination

Detailed instructions for measuring the density of solids and liquids.

11.3 Adding Function

Step-by-step guide for using the adding function to total weighings.

11.4 Checkweighing

Procedures for setting tolerance limits and performing checkweighing.

11.5 Percent Determination

Instructions for displaying results in percentage relative to a reference weight.

11.6 Animal Weighing Function

Guide to using the function for averaging readings over time.

11.7 Peak Value Function

Instructions for capturing and displaying the maximum load value.

12 Data Output RS 232C

12.1 Technical Data

Specifications for the RS 232C interface, including code and bit settings.

12.2 Pin Allocation of Balance Output Plug

Diagram showing the pinout for the balance's output plug.

12.3 Interface Types

Details on connecting the balance to PCs (9-pin, 25-pin) and printers.

12.4 Data Transfer

Description of the data set structure sent by the balance.

12.5 Data Transmission Formats

Various formats for transmitting data during weighing, density, and counting.

12.6 Remote Control Instructions

Commands for controlling the balance remotely via an interface.

12.7 Printer Mode

Requirements for successful communication with a printer.

13 Error Messages

ERR01-ERR08 Codes

Explains common error codes related to stability, adjustment, and data transfer.

UNLOAD and CAL But Errors

Describes errors related to weighing range and adjustment procedures.

Range Exceeded/Not Reached Errors

Explains messages indicating issues with load capacity or plate presence.

14 Service, Maintenance, Disposal

14.1 Cleaning Procedures

Guidelines for safely cleaning the balance.

14.2 Service and Maintenance

Information on authorized service personnel and safety before opening.

14.3 Disposal Guidelines

Instructions for disposing of the appliance and packaging according to local laws.

15 Instant Help

Troubleshooting Display Issues

Solutions for problems like a blank display or constantly changing weight.

Troubleshooting Incorrect Results

Steps to resolve issues with obviously incorrect weighing results.

Handling Other Error Messages

Advice on handling unlisted errors and contacting the manufacturer.

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