NT150/360 Problem
Posted: Fri Mar 30, 2018 8:07 am
I tried running my turbopump again today after a hiatus of a couple of months.
When I started the turbopump (press "Start" on the controller) it started accelerating, and then hit normal operation. Soon after hitting normal operation, the red failure light lit up and I pressed stop on the controller, shut off the backing pump and let some air in via the foreline to slow things down. I gave the pump a few minutes and pumped down again. On reaching 20 microns again, I turned the controller on. This time after the controller turns on and is finished self-testing, the failure light is lit up, without starting the turbo at all. Disconnecting the controller from mains power and connecting again results in the same.
It's a Leybold Oerlikon TMP 150, with a NT 150/360 controller. The pump was serviced and certified fine by Leybold last year, and has not been used since, same for the controller.
Backing pressure was 20 microns or so. Backing pump is an Edwards RV3, I've posted about both before. Leaks are negligible, it takes over 3 minutes to go from 20 to 40 microns when the valve on the roughing pump is shut.
John Futter seems to be a fan of the TMP pumps, but is not so fond of their NT controllers - Any ideas John?
When I started the turbopump (press "Start" on the controller) it started accelerating, and then hit normal operation. Soon after hitting normal operation, the red failure light lit up and I pressed stop on the controller, shut off the backing pump and let some air in via the foreline to slow things down. I gave the pump a few minutes and pumped down again. On reaching 20 microns again, I turned the controller on. This time after the controller turns on and is finished self-testing, the failure light is lit up, without starting the turbo at all. Disconnecting the controller from mains power and connecting again results in the same.
It's a Leybold Oerlikon TMP 150, with a NT 150/360 controller. The pump was serviced and certified fine by Leybold last year, and has not been used since, same for the controller.
Backing pressure was 20 microns or so. Backing pump is an Edwards RV3, I've posted about both before. Leaks are negligible, it takes over 3 minutes to go from 20 to 40 microns when the valve on the roughing pump is shut.
John Futter seems to be a fan of the TMP pumps, but is not so fond of their NT controllers - Any ideas John?