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(800) 622-0828 (US, CA)
(325) 235-5494
(325) 235-4672


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(Ex: Enter "m3" to search for Model 3.)

  • Home
  • Products
    • All Products
    • Health Physics
    • Medical Physics
    • Metal Recycling
    • Monitoring Systems
    • Emergency Response
    • How To Order
    • Connector Types
  • Support
    • Repair & Calibration
    • Training
    • Product Videos
    • Software & Firmware Downloads
    • RadCalc Software
    • Warranty Plans
    • Radiation Resources
    • Gate Monitor Tech Support
  • Documents
    • Product Manuals
    • Detector Reference Chart
    • Product Catalogs
    • Response Curves
    • Test Reports
    • Newsletter Archive
    • Technical Articles
    • End User Statement Form
    • Price List
  • Company
    • About Us
    • Ludlum Divisions
    • Directions to Facilities
    • Exhibition Schedule
    • ISO 9001 Certificate
    • ISO/IEC 17025 Accredited
    • Radioactive Material Licenses
    • Mobile App Privacy Policy
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    • Export Information
    • Employment Opportunities
  • Contact Us
    • Ludlum Headquarters
    • U.S. Contacts
    • International Contacts
    • Sales Contact Form
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Newsletter

Subscribe to our customer newsletter! Stay informed about Ludlum products and services, and get helpful support tips. Sent out four times a year.

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Technical Articles

Over the years, Ludlum Measurements has written several technical articles in support of our products. These articles cover topics such as troubleshooting and repair tips, calibration techniques, and other information related to radiation detection and instrumentation.

Survey Meters and Detectors

Tags:
  • Detectors

At some point you may wish to use a different detector with your survey meter than the detector the instrument was originally calibrated with. Unfortunately, this can cause issues because not all detectors operate at the same high voltage or use equivalent meter scales. Using a survey meter and a detector that have not been configured to be used together can lead to inaccurate radiation measurements.

Read more ...

Adjusting the High Voltage on LMI Instruments

One of the most common service problems is the maladjustment of the detector high voltage setting. We receive many calls from users who have attempted to trouble-shoot their instrument with a "high Impedance" voltmeter. This usually results with the problem of not being able to adjust the high voltage above 450 V. The reason for this problem is the "high impedance" voltmeter typically has an 11 MΩ output impedance and will overload on resistive loads below 60 MΩ.

Read more ...

Determining Detector Operating Voltage

Tags:
  • Detectors
  • Scintillation Detectors
  • Gas Proportional Detectors

Many of our customers inquire about the procedure we use to check the operating voltage of scintillation or proportional type detectors. We call this process “to run a plateau”. Hopefully, the following will help to answer a few of these questions.

Read more ...

Troubleshooting Tips

Tags:
  • Troubleshooting / Repair

Occasionally, you may encounter problems with your LMI instrument or detector that may be repaired or resolved in the field, saving turnaround time and expense in returning the instrument to us for repair. Toward that end, LMI electronics technicians offer the following tips for troubleshooting the most common problems. Where several steps are given, perform them in order until the problem is corrected. You should keep in mind that the three most common problems are: 1. detector cables, 2. sticky meters, 3. battery contacts.

Read more ...

Connectors

Have you ever really needed an extra probe or cable badly, and after receiving it, found it had the wrong connector?

If the answer is yes, then this problem can be solved with a little help from you.

Read more ...

Calibration Tips: Gas Proportional Detectors

Tags:
  • Detectors
  • Gas Proportional Detectors
  • Calibration

We frequently get questions about our gas proportional detectors, and are glad to offer information on how we "check out" this product. In the following example, we will demonstrate the check-out procedure for the Ludlum Model 43-68 gas proportional detector.

Read more ...

Repair Tips - Battery Compartments and Cables

Tags:
  • Troubleshooting / Repair

The majority of problems we encounter with returned instruments in the Ludlum Repair Department require simple solutions. Dirty or corroded contacts (especially battery contacts), damaged cables, loose connections, and other types of mechanical problems are the leading cause of instrument failure. Although electronic component failure is a possibility, it is infrequent in comparison.

Read more ...

Condensing Humidity

Occasionally a customer may experience a problem with condensing humidity causing dew or frost inside the instrument. Dew will form inside an instrument when it experiences a large decrease in temperature, such as moving from indoors to outdoors.

Read more ...

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Ludlum Measurements, Inc.
501 Oak Street
Sweetwater, TX 79556
USA

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