Discussion Category: Centrifuge
Please help resetting voltage on Beckman J-25i
I have a Beckman-Coulter J-25i that I got from a 3rd party. It had been running quite well most of the time, but would shut down on really hot days while giving a "Power" error on the upper right side of the display. We have the centrifuge connected to single phase 208V power, which between you and me, almost always measures out to be 203V under the best of conditions. I thought that a further drop of voltage on hot days would cause problems so, I decided to look where all of the leads were positioned on the transformer taps.
The power transformer terminal block on our centrifuge is set up as follows (On the left are the wire colors for wires leading from the transformer to the terminal block):
1. Black / White (2)
2. Grey / Black
3. Red / None
4. Orange / None
5. Yellow / Purple
6. Blue / Grey and Orange (3, one thinner)
Can anyone tell me what the proper wiring is for a 208V installation. The grey and orange wires are sitting at about 260V, which CAN'T be right.
Thank you,
Jim