BERTHOLD TECHNOLOGIES LB4710-190

Questions and Answers

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Brett WolfeAug 8, 2025
Why does the display vary too much on my BERTHOLD TECHNOLOGIES Switch?
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  Lisa JacobsonAug 9, 2025
  If the display varies too much on your BERTHOLD TECHNOLOGIES Switch, it could be due to several reasons. The time constant might be too small, in which case you should increase it. Another cause could be a count rate that is too low, so you should check the source age and irradiation level and replace the detector. Finally, detector stabilization may be faulty, so consider replacing the detector.
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george30Aug 15, 2025
What to do if the count rate is too low on my BERTHOLD TECHNOLOGIES LB4710-190?
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  angelarosarioAug 15, 2025
  If the count rate is too low on your BERTHOLD TECHNOLOGIES Switch, first check if the shielding is not open or not properly open and lock the shutter in the OPEN position. Also, verify that the useful radiation is correctly aligned towards the detector and optimize the alignment. Container installations in the radiation path may be the cause, so offset the irradiation level. Additionally, remove any wall deposits in the container. Finally, the source may have reached the end of its service life, so replace the source.
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morgan47Aug 20, 2025
Why does the display drift on my BERTHOLD TECHNOLOGIES LB4710-190?
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  Terri PhillipsAug 20, 2025
  If your BERTHOLD TECHNOLOGIES Switch display drifts, it could be due to wall deposits on the container wall; perform a new empty calibration. Alternatively, the photomultiplier might be faulty, so replace it.
J
Jeffrey VelezAug 27, 2025
How to fix no display on BERTHOLD TECHNOLOGIES LB4710-190 Switch?
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  Daniel SmithAug 27, 2025
  If there is no display on your BERTHOLD TECHNOLOGIES Switch, check the power line to ensure there is a power supply. Also, check the fuse.
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Matthew Weaver DDSSep 1, 2025
What to do if the display is not readable on BERTHOLD TECHNOLOGIES Switch?
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  mary46Sep 1, 2025
  If the display on your BERTHOLD TECHNOLOGIES Switch is not readable, it could be due to a processor error. Observe the error code and perform a reset by keeping the Clear button pushed down while you turn on the power supply. Alternatively, the evaluation unit may need replacement.

Summary

Chapter 1. General Information

1.1 Use and Function

Describes the purpose of the LB 471 Mini Switch for monitoring and detection of liquid and bulk material levels.

Chapter 2. Safety

2.1 Safety Concept

Details the system's design according to accepted safety rules and international radiation exposure limits.

2.3 Radiological Safety Officer

Defines the responsibilities of the appointed radiological safety officer for radiation protection.

2.5 Radiation Protection Areas

Defines Exclusion Areas, Controlled Areas, and Monitoring Areas based on dose rate limits.

2.6 Safety Installations

Covers source shieldings, including description of components and operation of the locking mechanism.

2.7 General Safety Instructions

2.8 Emergency Instructions

Outlines basic principles and actions for health and safety during emergencies, focusing on time, distance, and shielding.

Chapter 3. Functional Safety

3.1 Use and Function

Describes the system's application for monitoring liquid and bulk material levels and its compliance requirements.

3.2 Safety Function

Explains the safety function related to detecting count rate changes and defining safe status based on operation mode.

3.3 Safety Requirement

Details Safety Integrity Levels (SIL), Safe Failure Fraction (SFF), and Hardware Fault Tolerance (HFT).

Chapter 5. Installation

5.1 Transport to the Installation Site

5.2 Installing the Detector

Details the process of installing the detector, including mounting, fastening clamps, and detector holders.

Chapter 8. Electrical Installation

8.1 Connecting Evaluation Unit and Detector

Explains the connection of the detector via a 2-wire cable and the different versions of the LB 471 limit switch.

8.3 Connecting the Evaluation Unit to Power

Provides instructions for connecting the evaluation unit to power, including safety precautions and connection points.

Chapter 9. Maintenance

9.1 Malfunctions

Lists common malfunctions, their causes (e.g., power supply, fuse), and remedies.

9.4 Repairing the Detector

Covers detector repair, including dismantling NaI and GM detectors and checking crystal-multiplier combinations.

9.5 Replacing the Source

Describes when and how to replace the radioactive source, emphasizing safety and necessary coordination.

Chapter 10. Servicing the Shielding

10.1 Checking Shielding and Source

Details procedures for testing the locking mechanism of the shielding to ensure safe beam shut-off.

10.2 Leak Test

Chapter 11. Radiation Protection

11.1 Basics and Directives

Covers international limits for radiation exposure and the role of the radiological safety officer.

Chapter 12. Disposal

Radioactive Sources Disposal

Instructs on returning unused or end-of-life radioactive sources to the manufacturer or disposal center.

Equipment and Waste Disposal