Announcing the eLogger V3! - Page 3

StarmanDXE · Oct 23, 2007, 10:25 AM

My guess would be that it just reads it inside the logger with the hall ring sensor. I doubt they would build it so you need to rig something else up just to read the current...

JIM CALDWELL A · Oct 24, 2007, 07:53 PM

I hope not.

billpa · Nov 04, 2007, 06:46 PM

Hi All,

The hall sensor is integrated inside the logger, just like with the eLogger V2.

Regards,

Bill for Eagle Tree

Yellowsierra · Nov 04, 2007, 11:07 PM

Hey Bill,

I noticed you have a 100 amp and 150 amp version. Will the 100 amp only handle 100 amps or does it only read up to 100 amps. The reason I ask is because my combo may pull around 100 to 105 amps.

Justin

billpa · Nov 07, 2007, 10:57 AM

Hi Yellowsierra,

The 150 amp version has much heavier wire leads. I can't really recommend running more than 100 amps through the 100 amp version, so this would be at your own risk. As always, you'd want to do a bench test similar to an actual flight to verify everything.

Regards,

Bill, for Eagle Tree

kristjane · Nov 07, 2007, 11:06 AM

Hi!
Still no Mini USB port on logger?

I have V2 logger, that I have to send back to HC, because of malfunction. At beginning all worked great, then it got mad, voltage was too hight, current 0A, everything else works ok. Will be still V2 possible to get and will old sensors work with new V3 version, because I have multi expander and two temperature sensors at home?

Thank you and have a nice day!
Kristjan

eajohnson · Nov 07, 2007, 06:38 PM

Quote:

Originally Posted by billpa

Hi Yellowsierra,

The 150 amp version has much heavier wire leads. I can't really recommend running more than 100 amps through the 100 amp version, so this would be at your own risk. As always, you'd want to do a bench test similar to an actual flight to verify everything.

Regards,

Bill, for Eagle Tree

What's the difference in actual measured resistance between the 100A and 150A versions?

billpa · Nov 07, 2007, 06:58 PM

Hi eajohnson,

Other loggers/wattmeters on the market use a resistance shunt to measure current, which does indeed add resistance. We use a hall effects sensor to measure current, so there is essentially no resistance. The hall sensor costs us a lot more, but is worth it in my opinion. The resistance of our hall sensor is 0.00013 ohms, regardless of amperage.

Regards,

Bill, for Eagle Tree

eajohnson · Nov 07, 2007, 07:29 PM

Quote:

Originally Posted by billpa

Hi eajohnson,

Other loggers/wattmeters on the market use a resistance shunt to measure current, which does indeed add resistance. We use a hall effects sensor to measure current, so there is essentially no resistance. The hall sensor costs us a lot more, but is worth it in my opinion. The resistance of our hall sensor is 0.00013 ohms, regardless of amperage.

Regards,

Bill, for Eagle Tree

That's the answer I wanted to hear, 0.00013ohms is in the 'would never be able to tell it's there' category , maybe 1.5W loss on a 3000W setup? Can't wait for these to ship.

StarmanDXE · Nov 07, 2007, 07:35 PM

What's the resistance like for the V2, then?

billpa · Nov 08, 2007, 12:37 PM

Exactly the same. :-)

StarmanDXE · Nov 08, 2007, 01:01 PM

I thought you said it uses a shunt resistor?

bobskinner · Nov 09, 2007, 05:40 AM

I did not cancel my order of the V2 and received it a few days back as I needed the logger urgently. It is quite cute, the soldering work was a little shabby on the current sensor and other than a bit of recalibrating on the voltage and current measurements it seems to be working well.

Bill, is a different hall sensor chip being used on the V3 or will it be the same one that is on the V2? I recognized the chip as I have a couple of them lying in my toolbox from a past project. If a new sensor is being used would it be possible to say which chip as the datasheets would offer some useful info on expected accuracy of the hall sensor, I might still be considering buying the V3.

Thank you,

Bob

StarmanDXE · Nov 09, 2007, 09:04 AM

Quote:

Originally Posted by bobskinner

Bill, is a different hall sensor chip being used on the V3 or will it be the same one that is on the V2?

I guess that means the V2 uses a hall sensor?

billpa · Nov 09, 2007, 04:26 PM

Hi All,

Yes, all our products use a hall sensor of one form or another.

The V3's Hall sensor has somewhat improved specs, but in reality the tolerances of individual components are factored out by our per-unit calibration procedure. The increased resolution of the V3 will be more "impactful" than the sensor hardware change.

Regards,

Bill, for Eagle Tree

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Oct 23, 2007, 10:25 AM	#31
StarmanDXE Advanced Learner Join Date: Dec 2006 Location: State College, PA Posts: 2,766	My guess would be that it just reads it inside the logger with the hall ring sensor. I doubt they would build it so you need to rig something else up just to read the current...

Oct 24, 2007, 07:53 PM	#32
JIM CALDWELL A Registered User Join Date: Dec 2000 Location: Cleveland Cuyahoga, Ohio, United States Posts: 278	I hope not.

Nov 04, 2007, 06:46 PM	#33
billpa Registered User Join Date: Nov 2003 Posts: 1,595	Hi All, The hall sensor is integrated inside the logger, just like with the eLogger V2. Regards, Bill for Eagle Tree

Nov 04, 2007, 11:07 PM	#34
Yellowsierra Registered User Join Date: May 2007 Location: Andrews, NC Posts: 109	Hey Bill, I noticed you have a 100 amp and 150 amp version. Will the 100 amp only handle 100 amps or does it only read up to 100 amps. The reason I ask is because my combo may pull around 100 to 105 amps. Justin

Nov 07, 2007, 10:57 AM	#35
billpa Registered User Join Date: Nov 2003 Posts: 1,595	Hi Yellowsierra, The 150 amp version has much heavier wire leads. I can't really recommend running more than 100 amps through the 100 amp version, so this would be at your own risk. As always, you'd want to do a bench test similar to an actual flight to verify everything. Regards, Bill, for Eagle Tree

Nov 07, 2007, 11:06 AM	#36
kristjane Have a nice day! Kristjan Join Date: Jan 2006 Location: Novo mesto, Slovenia (EU) Posts: 161	Hi! Still no Mini USB port on logger? I have V2 logger, that I have to send back to HC, because of malfunction. At beginning all worked great, then it got mad, voltage was too hight, current 0A, everything else works ok. Will be still V2 possible to get and will old sensors work with new V3 version, because I have multi expander and two temperature sensors at home? Thank you and have a nice day! Kristjan

Nov 07, 2007, 06:58 PM	#38
billpa Registered User Join Date: Nov 2003 Posts: 1,595	Hi eajohnson, Other loggers/wattmeters on the market use a resistance shunt to measure current, which does indeed add resistance. We use a hall effects sensor to measure current, so there is essentially no resistance. The hall sensor costs us a lot more, but is worth it in my opinion. The resistance of our hall sensor is 0.00013 ohms, regardless of amperage. Regards, Bill, for Eagle Tree

Nov 07, 2007, 07:35 PM	#40
StarmanDXE Advanced Learner Join Date: Dec 2006 Location: State College, PA Posts: 2,766	What's the resistance like for the V2, then?

Nov 08, 2007, 12:37 PM	#41
billpa Registered User Join Date: Nov 2003 Posts: 1,595	Exactly the same. :-)

Nov 08, 2007, 01:01 PM	#42
StarmanDXE Advanced Learner Join Date: Dec 2006 Location: State College, PA Posts: 2,766	I thought you said it uses a shunt resistor?

Nov 09, 2007, 05:40 AM	#43
bobskinner Registered User Join Date: Aug 2006 Location: Loveland, CO Posts: 223	I did not cancel my order of the V2 and received it a few days back as I needed the logger urgently. It is quite cute, the soldering work was a little shabby on the current sensor and other than a bit of recalibrating on the voltage and current measurements it seems to be working well. Bill, is a different hall sensor chip being used on the V3 or will it be the same one that is on the V2? I recognized the chip as I have a couple of them lying in my toolbox from a past project. If a new sensor is being used would it be possible to say which chip as the datasheets would offer some useful info on expected accuracy of the hall sensor, I might still be considering buying the V3. Thank you, Bob

Nov 09, 2007, 04:26 PM	#45
billpa Registered User Join Date: Nov 2003 Posts: 1,595	Hi All, Yes, all our products use a hall sensor of one form or another. The V3's Hall sensor has somewhat improved specs, but in reality the tolerances of individual components are factored out by our per-unit calibration procedure. The increased resolution of the V3 will be more "impactful" than the sensor hardware change. Regards, Bill, for Eagle Tree