I haven't used this centrifuge for quite a while. It is an older (2006) version of the VWR 200. I have set the speed to 5000 rpm, it has the 6-place 50 ml angle head rotor installed. The speed tops out at 665 rpm. What can I do to remedy this situation? Initially the LED screen was flashing "94" . I unplugged it and plugged it back in again, and the screen now functions normally.
Mon May 03 2021
Won't reach set speed?
Mon May 03 2021Reply from Ben C
Ozark Biomedical may be able to assist.
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Mon May 03 2021Reply from C. Mash
Unfortunantly, I believe that model is obsolete. I called VWR directly to see if I could get an updated service manual to cover your error code, and they suggested having you contact them. I'm afraid that may be your best coarse of action. Their phone number is (888) 897-5463. Thanks again for using MedWrench.
Ozark Biomedical
Senior Technical Specialist
800-457-7576
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Thu May 23 2024Reply from E.T.
Did you eventually got a solution to your problem? I have a the same exact problem and i was wondering if there's a max speed setup that was activated by mistake?
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Fri May 24 2024Reply from Chris-CBET
I'd wager your motor is shot. any strange smells, burning rubber? I'm thinking bad motor, or bad speed sensor, or bad power supply. all of which are fairly easy to troubleshoot but if parts aren't available, it's waste of time. just replace it. My company would be happy to sell you a replacement unit or you could reach out to any of the drucker distributors
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Mon May 27 2024Reply from E.T.
Hi. No bad smell. I have a signal for the speed sensor and a signal (PWM) for the motor that won't go beyond 20% of the max. I've connected the motor directly to a power supply and it turns fast and smooth. It's look like these a speed limiter somewhere but i can't find anything on the manuals!
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Wed May 29 2024Reply from MapleTreeBiomed
Any chance the RPM is set to 5000 but it's displaying RCF during the run cycle?
Andrew Whyte, CBET, Maple Tree Biomedical LLC
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Thu May 30 2024Reply from E.T.
I've measured the PWM signal going to the motor and the displayed speed is proportional to what i'm seeing. I even took a tachometer to verify the speed....it won't go beyond 750RPM. I'm clueless.
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Fri May 31 2024Reply from T-Lobato
You're not getting an error code, correct? Looking though a manual (I think it's the correct one) and you may want to check:
Incorrect positioning of imbalance sensor.
Speed sensor is defective or cable is broken at speed sensor, possibly, loose magnet.
Not sure where either of these are located.
GL!
TJ Lobato | MedWrench Guru
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