GRT Hall-Effect Configuration

[GalinHdz]

Are there any issues with using the CS-01 configuration setting for a CS-02, 50Amp GRT Hall effect sensor?

https://www.aircraftspruce.com/catalog/inpages/grandrapidsSensor.php

 

[Dynon]

Without digging into it, I think the characterization won't work. That doesn't mean you couldn't create one for SkyView. I'm not 100% sure whether there's any electrical limitation though. Let me see what I can find out.

 

[GalinHdz]

I went ahead and connected the CS-02. I then configured it as a CS-01 and it worked. However, it doesn't calibrate correctly. Imagine that.

When I set it to be accurate at 0 Amps, then it is about 3 Amps high at the 15 Amp point. When I set it to be accurate at 15 Amps, then it reads 3 Amps low at the 0 Amp point. So for now I am setting it to be accurate at 0 Amps knowing it is off at 15 Amps.

Are there any plans to set up a characterization for the CS-02 sensor within the SkyView system?

 

[dynonsupport]

No plans to support it, but attached is a sensor.sfg that may work. We don't have a way to test it here, so it's just based on the datasheets. It has all the CS-01's replaced with CS-02's. Please let us know if it works.

 

[lgabriel]

I also have a draft sensor config for the CS-02, based on numbers I got from a phone call to GRT.  I haven't calibrated it against a known source, but so far the amp readings have made sense.

This is for a +1A offset (necessary for my installation), but you can change that by messing around with the low coefficient c_x0.

;  CS-02 current sensor
sensor={
      id=GRT CS-02 +1 OFFSET
      function=AMPS
      pins=C37_P8 C37_P22 C37_P23 C37_P31
      name=AMPS
      min_val=-50
      max_val=50
      resolution=0
      round=1
      is_piecewise=0
      low_coeff={
            c_x4=0
            c_x3=0
            c_x2=0
            c_x1=20
            c_x0=-49
            }
      low_resistance=NONE
      low2high_cross=0
      high_coeff={
            c_x4=0
            c_x3=0
            c_x2=0
            c_x1=0
            c_x0=0
            }
      high_resistance=NONE
      high2low_cross=0
      shift=5
      }

Edit: formatting

 

[GalinHdz]

THANKS. I will try each of them and see which gives a more accurate reading across the range I can actually test.

 

[GalinHdz]

No plans to support it, but attached is a sensor.sfg that may work. We don't have a way to test it here, so it's just based on the datasheets. It has all the CS-01's replaced with CS-02's. Please let us know if it works.

Just to make sure I get this correct, I replace my entire existing .sfg file with the one you attached to this post.

 

[dynonsupport]

Yes, that is a full .SFG from our latest release with all the other sensors in it.

 

[GalinHdz]

OK, so the CS-02 in now in the new .sfg? AWESOME!

 

[dynonsupport]

No, the CS-02 is only in the .SFG attached to this thread. As mentioned above, it's untested.

 

[GalinHdz]

No, the CS-02 is only in the .SFG attached to this thread. As mentioned above, it's untested.

Ok, Got it now.

 

[vasper]

Could we get an update on this effort? I'm trying to use my Rocky Mountain Instruments Hall Effect current sensors which "should" be similar to this and I'm wondering what my chances are. If I have to replace them with shunts or with GRT sensors, I can, but I'd like to weigh all of my options.
Thanks!

 

[GalinHdz]

Sorry for taking so long to answer. I used the DYNON provided .SFG file and the CS-02 calibrated very well. Now the CS-02 hall effect sensor matches the amp shunt almost perfectly. I wound up using a -2 offset for my particular installation. I recommend you add this data as the CS-02 file so we can select it or the CS-01 when setting up our sensors.

Once again you guys did a great job.

 

[n28et]

Could we get an update on this effort?  I'm trying to use my Rocky Mountain Instruments Hall Effect current sensors which "should" be similar to this and I'm wondering what my chances are.  If I have to replace them with shunts or with GRT sensors, I can, but I'd like to weigh all of my options.
Thanks!

Hi Vernon,
I too am converting from a Rocky Mountain uMonitor and was planning to use their Hall Effect sensor.  Did you have any luck with your installation?

Thanks.

 

[dynonsupport]

Thanks for letting us know your results. Based on your results, we've submitted the CS-02 configuration file for consideration of being incorporated into the Sensor Definition File.

Sorry for taking so long to answer. I used the DYNON provided .SFG file and the CS-02 calibrated very well. Now the CS-02 hall effect sensor matches the amp shunt almost perfectly. I wound up using a -2 offset for my particular installation. I recommend you add this data as the CS-02 file so we can select it or the CS-01 when setting up our sensors.

Once again you guys did a great job.