Re: [Vo]:Making Sense of ECAT Water Pump Flow Rate

2011-10-27 Thread Jed Rothwell
Colin Hercus wrote: The manufacturers data sheet indicates it has variable rate and *variable stroke* pump and doesn't indicate that a tube can be replaced or even that it's a peristaltic pump. I believe it is a constant displacement pump, not peristaltic. Peristaltic pumps do not have

Re: [Vo]:Making Sense of ECAT Water Pump Flow Rate

2011-10-27 Thread johnpage
: [Vo]:Making Sense of ECAT Water Pump Flow Rate Colin Hercus wrote: The manufacturers data sheet indicates it has variable rate and variable stroke pump and doesn't indicate that a tube can be replaced or even that it's a peristaltic pump. I believe it is a constant displacement pump

Re: [Vo]:Making Sense of ECAT Water Pump Flow Rate

2011-10-26 Thread Colin Hercus
The manufacturers data sheet indicates it has variable rate and *variable stroke* pump and doesn't indicate that a tube can be replaced or even that it's a peristaltic pump. On Fri, Oct 21, 2011 at 2:28 AM, Alan J Fletcher a...@well.com wrote: At 10:34 PM 10/19/2011, David Roberson wrote: I

Re: [Vo]:Making Sense of ECAT Water Pump Flow Rate

2011-10-20 Thread Jed Rothwell
David Roberson wrote: An additional measurement of water consumed from the boiling point to the test completion showed a usage of 11.08 kilograms per hour (3.0 grams per second).None of the three measurements came close to the expected value based upon the rate setting.. . . This pump

Re: [Vo]:Making Sense of ECAT Water Pump Flow Rate

2011-10-20 Thread David Roberson
@eskimo.com Sent: Thu, Oct 20, 2011 10:14 am Subject: Re: [Vo]:Making Sense of ECAT Water Pump Flow Rate David Roberson wrote: An additional measurement of water consumed from the boiling point to the test completion showed a usage of 11.08 kilograms per hour (3.0 grams per second). None

Re: [Vo]:Making Sense of ECAT Water Pump Flow Rate

2011-10-20 Thread Jed Rothwell
David Roberson wrote: Further support for a lower net flow rate during the October 6 testing is given by the measurement performed by Mats near the end of the run. He very carefully measured a rate of .9 grams per second being careful not to disturb the plumbing. This value coupled with the

Re: [Vo]:Making Sense of ECAT Water Pump Flow Rate

2011-10-20 Thread David Roberson
. The truth is out there! Dave -Original Message- From: Jed Rothwell jedrothw...@gmail.com To: vortex-l vortex-l@eskimo.com Sent: Thu, Oct 20, 2011 10:57 am Subject: Re: [Vo]:Making Sense of ECAT Water Pump Flow Rate David Roberson wrote: Further support for a lower net flow rate during

Re: [Vo]:Making Sense of ECAT Water Pump Flow Rate

2011-10-20 Thread Alan J Fletcher
At 10:34 PM 10/19/2011, David Roberson wrote: I have been trying to understand the unusual behavior of the ECAT water input pump. It may be possible to replace the peristaltic tube and thus get a result which exceeds the maximum for a standard tube.

[Vo]:Making Sense of ECAT Water Pump Flow Rate

2011-10-19 Thread David Roberson
I have been trying to understand the unusual behavior of the ECAT water input pump. It appears that the same pump was used in both of the recent demonstrations. Mats Lewan made excellent notes during his September test that accurately measured the pump output at several points in time. The