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[crazydane]

Perfect. A PT Type of 206 and a PT Range of 2 is giving me 244.3 V, which is very close. I'll check with a Fluke in the am at the 400A disconnect to see if I need to tweak it further.

Peter

[Teken]

Perfect. A PT Type of 206 and a PT Range of 2 is giving me 244.3 V, which is very close. I'll check with a Fluke in the am at the 400A disconnect to see if I need to tweak it further.

Peter

Hello Peter,

Perfect ~ Let me know if there's anything else.


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[crazydane]

Ok, so now that I have the correct voltage showing, my current/watts readings are double what they should be.

I went to this page:



And every time I try to change the CT Range on channels 1 and 2 from 2 to 4, it is ignored.

So as a result, my power readings are twice what they should be as seen here:



I know it is exactly twice what it should be from looking at my other monitor:

[Teken]

Hello Peter,

If you change channel one to (CT Range 3) what happens?

[crazydane]

It still ignores it. Ditto if I make it 1. Appears to be locked at 2 for some reason.

In a similar fashion, all the channels with M-40's on them appear to be locked at 4.

Also, if I change channel 1 to a SPLIT-400, the CT Range is locked to 1.

[Teken]

It still ignores it. Ditto if I make it 1. Appears to be locked at 2 for some reason.

In a similar fashion, all the channels with M-40's on them appear to be locked at 4.

Also, if I change channel 1 to a SPLIT-400, the CT Range is locked to 1.

Hello Peter,

At first, my thoughts were the 240 PT was the issue. But I just confirmed this is also the case using a 120 PT. Something must have been changed in the COM / Engine firmware. Paul at Brultech will need to review the firmware code ~ unless there is something obvious we are both missing here.

Would you please send in a formal service request to Brultech so they can track this issue. Also link this thread so they can see the history if you will.

[crazydane]

I did submit a ticket this morning with a link to this thread. Hopefully I'll be able to provide an update tomorrow.

[ben]

To input your own CT settings, you need to use the Manual selection. Using the Micro/Split settings will default to those CT settings.

We suggest once you have it calibrated per your meter to increase the range by 1 to monitor in the 120V range (as all channels use a 120V reference). This will give the average of both phases when put across a 240V breaker.

If you want the 240V reference, and you go the CT setting route, you'll end up with half the current reading, which may not be an issue if you're not interested in the amp readings.

[crazydane]

Hi Ben,

Ok, that makes sense. Under Channel Option, I have set the PT Type to 208 and the PT Range to 3. This is giving me a voltage reading of 122.4V. This is slightly less than the 122.6V reading I get from my Fluke when I divide the voltage across both phases by 2, but is closer than if I set the PT Type to 209.



Note that I have Channels 1 and 2 set to Net Metering since I have solar. Once I can get the 1240 at my shop building working, I'll be able to set the CTs there that measure solar production to Net Metering as well, and hopefully there will then be an option to add the net readings together to see my actual consumption. Right now, channel 1 and 2 shows my Net Usage (what I draw from the grid minus what I put back onto the grid).

[Teken]

For the benefit of others who may stumble upon this thread and need to do the very same. When Ben indicates the CT Type / CT Range needs to be manually adjusted. You will select the channel in question (In Red) then change the CT Type / CT Range values (In red) to the desired numerical values to obtain the most accurate readings.

It should be noted changing the PT Type & PT Range impacts the system globally. Making the same changes on the CT impacts that specific CT only.

Lastly, its imperative you have and use a resistive load of known (validated) quantity. You could just use ohms law but even that won't be 100% accurate when other factors aren't taken into consideration.

IE. Just because you stick in a 100 watt light bulb doesn't mean it actually consumes 100 watts. Every piece of hardware (load) has a variance in its material. Also taking account the wattage will be higher / lower based on the line voltage the measurement was taken at the time.

Lastly, for the sake of saying a 100 watt CFL, LED, is not equivalent to a 100 watt incandescent light bulb.