Mxus Temp Sensor + Cycle Analyst

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teklektik   10 GW

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Re: Mxus Temp Sensor + Cycle Analyst

Post by teklektik » Feb 04 2018 1:21pm

Beatrix wrote:
Feb 03 2018 8:53pm
It seems to be reading backwards, i had it reading 30 c`in the afternoon and this morning the temp outside is much colder and it reads 90 c
I think you are saying you wired up a Mxus sensor (since that's what the thread is about), and used the settings in the quoted post, correct?

A part of the problem is that you don't really know what kind of sensor is installed.

We know the KTY devices are PTC (Positive Temperature Coefficient) parts, but you seem to be having a reverse temperature relationship. My knee jerk reaction is that things are probably wired and installed correctly but the part is NTC instead of PTC. So - there is a chance that they installed a CA-compatible NTC 10K thermistor - which would be cool.

So - try switching the CA config to '10K Thrmstr' and see how the temperature looks. Might just work.
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Re: Mxus Temp Sensor + Cycle Analyst

Post by Beatrix » Feb 05 2018 3:00am

Hi there

Thanks for the reply

Yess you are correct i have setup the way posted in this article. White wire going from mxus to yellow signal wire of Ca v3

I changed the ca v3 setting to 10k themistor and it reads -30 c` i test ride and while accelerating temp rise to -27 c`when come back to stop temp reads - 36 c`

I checked out side temp of motor with infrared thermometer after test ride and it read 28,7c`

So maybe it is still PTC sensor ... you mentioned above the KTY83/110 was a polarized part. If this part was placed in reverse would this read reverse temp .?

Or could this be ground wire not finding ground or wiring short ?

When i change back to linear mode i do see the temp setting read 4.99v @ 33.9 c`and when i change value of this it never change when go out of menu it always read 4.99v but also to not the last digit 4.99v is flickering like its trying to go higher.

Thanks again for the help

Regards

Beatrix

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Re: Mxus Temp Sensor + Cycle Analyst

Post by Beatrix » Feb 05 2018 3:38am

Going back over my settings. I have it wired the same way but my sacling is dif it reads

Linear type

Temp> 0`c volts 4.80v

Temp> T Scale 186.9 Deg/V

Temp> Thrsh Temp 100 Deg

Temp> Max Temp 125 Deg

Setup temp sensr 4.99v 33.9

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Re: Mxus Temp Sensor + Cycle Analyst

Post by Beatrix » Feb 05 2018 3:45am

And then if i change scaling to

0`c @ 0.67v

T scale 186.9deg/v

I get V and temp reading of

4.99v 805 `

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teklektik   10 GW

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Re: Mxus Temp Sensor + Cycle Analyst

Post by teklektik » Feb 05 2018 1:56pm

Beatrix wrote:
Feb 05 2018 3:00am
Yess you are correct i have setup the way posted in this article. White wire going from mxus to yellow signal wire of Ca v3
Ok - this sounds correct - you mean the NTC yellow wire to the thermistor connector, correct?
Beatrix wrote:
Feb 05 2018 3:00am
I changed the ca v3 setting to 10k themistor and it reads -30 c` i test ride and while accelerating temp rise to -27 c`when come back to stop temp reads - 36 c`
This really doesn't make sense - the final temperature should be between the initial ambient and high temp while accelerating. This is not working properly using the 10K mode.
Beatrix wrote:
Feb 05 2018 3:00am
So maybe it is still PTC sensor ... you mentioned above the KTY83/110 was a polarized part. If this part was placed in reverse would this read reverse temp .?
I have no experience with the part, but it's an active silicon part and I would expect reverse polarity to make it not work at all - maybe forever.
Beatrix wrote:
Feb 05 2018 3:00am
Or could this be ground wire not finding ground or wiring short ?
You are getting very strange results so anything could be causing it, although I can't immediately see how a short could cause these symptoms. Floating GND - maybe.
Beatrix wrote:
Feb 05 2018 3:00am
When i change back to linear mode i do see the temp setting read 4.99v @ 33.9 c.
This looks wrong.
I configured linear mode on my bench rig for a KTY83/110 part (according our respected MXUS vendor teslanv >>>here<<<) using these values from the table >>>here<<<:
0 degC V = 0.70
Scal degC/V = 183.3

When I set the input to 4.95V I get a temperature of 778.2 degC which looks correct.
Please verify that you are using these settings. The 4.99V input looks wrong as well and suggests a disconnected GND or damaged sensor.

For an ambient temperature of about 25 degC you should be seeing an input voltage of about 0.84V.
(25 degC / 183.3 degC/V = 0.14V
V - 0.4V + 0.7 V@0degC = 0.84V

When I try this on the CA and input 0.84V I do get 25 degC.

Please check you settings - they don't seem to be correct based on the measured voltage and calculated temperature.
The measured voltage cannot be correct, so there is something wrong with the wiring or sensor. Because this is at the rail voltage of about 5V, I would guess you might have the thermistor signal from the Mxus connected to the CA Gnd pin instead of the NTC pin - which would give that exact symptom.
Beatrix wrote:
Feb 05 2018 3:45am
And then if i change scaling to

0`c @ 0.67v
T scale 186.9deg/v

I get V and temp reading of
4.99v 805 `
Excellent - this is much better with the proper settings. This is expected temperature for the 4.99V input.

So - your settings are now correct, but you have a problem with the sensor. Check the wiring to the CA NTC pin. Check the voltage at the Mxus connector from the signal to GND. If these are at 5V, then the problem is internal to the motor.
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Beatrix   10 µW

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Re: Mxus Temp Sensor + Cycle Analyst

Post by Beatrix » Feb 06 2018 12:54am

Hi ma8

RESOLVED

Well what do you know, they use a 10k thermister in new the mxus v3 3000w 4t.

Also i had a broken temp wire, which was why i was getting strange a reading.

So everything working correctly :)

Thank you again

Your a true gem

Regards Beatrix

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teklektik   10 GW

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Re: Mxus Temp Sensor + Cycle Analyst

Post by teklektik » Feb 06 2018 11:14am

Beatrix wrote:
Feb 06 2018 12:54am
RESOLVED
... i had a broken temp wire, which was why i was getting strange a reading.
So everything working correctly :)
Great news!
Sorry it took a while to get this sorted, but glad you were able to sleuth it out.
Beatrix wrote:
Feb 06 2018 12:54am
Well what do you know, they use a 10k thermister in new the mxus v3 3000w 4t.
Gee, that's interesting.
I'm sure other Mxus owners will appreciate the assist to get this sensor thing squared away.
Thanks for posting back about this change.
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Re: Mxus Temp Sensor + Cycle Analyst

Post by brickwall » May 16 2018 7:17am

Hi. I too am having some issues with a MXUS v3 and the CA 3. Configuring it for KTY83/110 or any other sensors in the table produces bogus results for me.

I get 1.19V on the CA while outside temp is approximately 27°.
I believe it's a linear sensor, but setting it to 10K thermistor yields 74.1° at the same 27° ambient temperature.

Any ideas?

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Re: Mxus Temp Sensor + Cycle Analyst

Post by Duncan75 » Nov 24 2018 1:36pm

I don't want to open a new thread for this question, I have a Kelly kls7218s and am running a Mxus 3k V3.

In the controller configuration settings, which value do I choose for the temperature sensor?

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Re: Mxus Temp Sensor + Cycle Analyst

Post by amberwolf » Nov 24 2018 10:03pm

Which sensor did your motor come with?

What choices are available in the configuration program?

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Re: Mxus Temp Sensor + Cycle Analyst

Post by Duncan75 » Nov 25 2018 7:24am

I don't know, but this thread says it's a KTY83/110.

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Re: Mxus Temp Sensor + Cycle Analyst

Post by Duncan75 » Nov 27 2018 8:16pm

Configuration program offers:
"Motor Temp Sensor: Motor Temp Sensor, 0:None,1:KTY84-130 or 150,2:KTY83-122.Range 0-2"

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Re: Mxus Temp Sensor + Cycle Analyst

Post by amberwolf » Nov 27 2018 10:40pm

Then the last option is probably the closest. All the data for the KTY83 series is here
https://www.nxp.com/docs/en/data-sheet/KTY83_SER.pdf?
if you want to see the differences--basically they're very close, but not identical, so the controller wont' read quite the right temperature. Probably close enough for most purposes, however.

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Re: Mxus Temp Sensor + Cycle Analyst

Post by Duncan75 » Nov 28 2018 12:53pm

Ok, I'll try it. Thanks for the answer, I appreciate it.

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