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Welcome to Service AI, your trusted source for accessories, spare parts, and certified pre-owned laboratory instrumentation tailored for scientists and startups. We provide reliable, current equipment at competitive prices, along with essential support for instruments no longer made or backed by their original manufacturers.

Our expertise spans leading brands like Beckman Coulter and Agilent, and we are committed to high-quality standards through certified maintenance, repair, and professional installation services. We believe our installation services provide the confidence and assurance you need when purchasing instrumentation from a reliable and trustworthy source.

At Service AI, we don't conduct the science—we empower scientists with reliable laboratory instrumentation and spare parts that are guaranteed to perform. We trust in scientists' expertise to determine the instrumentation they need to advance their research.

With more than 25 years of experience, our dedicated team prides itself on delivering only the highest quality products. Every instrument we offer has been thoroughly tested and certified by manufacturer-trained engineers. We ensure the functionality of our products with a Full Performance Guarantee and provide proof of performance documentation when applicable.

At Service AI, we also recognize the importance of meticulous shipping and safe delivery. Our products are handled with the utmost care to ensure they arrive in perfect condition. For those who require it, we offer professional installation services to help integrate our equipment seamlessly into your operations.

Purchase our reliable scientific laboratory equipment, and we’ll provide seamless installation service worldwide for your startup or research needs.

Advance your scientific endeavors with confidence: rely on us for recertified, trustworthy instruments at reasonable prices. It’s a smart choice made simple!

LS 6500 displays H# abort with 'count rate too low' message.

Beckman LS Guide

LS 6500 displays H# abort with 'count rate too low' message.

Service AI

The cause of H# value failure on the Beckman LS6500 may be due to a problem with the front end electronics, including the PMTs, pre-amp housing assembly, or high voltage power supply. However, it could also be due to a problem with the Cs137 source drive itself. To isolate the issue and confirm if the front end electronics is functioning correctly, perform a simple CPM count to check for valid sample counts. If it fails, the likely cause is a faulty pre-amp board in the pre-amp housing, specifically the board on the left-hand side near the cooling fan.

If the front end electronics are confirmed to be working correctly and the problem persists, check the mechanical movement of the source spring responsible for moving the radioactive source from the pea to the pig to ensure it is moving smoothly and not slipping. If the problem continues, it is recommended to seek the assistance of a trained expert for further investigation.

Email us at support@serviceai.us, or call us at our technical support line at +1-510-899-1340 for more information.

tags Beckman Coulter LS6500, Beckman LS6500, LS6500 READY! Wyse Winterm Module
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