Search found 11 matches

by ianf
Sat Jun 05, 2021 5:26 pm
Forum: Electric Meters
Topic: Omnimeter 1 v.3 and the magic smoke
Replies: 4
Views: 3299

Re: Omnimeter 1 v.3 and the magic smoke

Thanks!
by ianf
Sat May 29, 2021 7:33 am
Forum: Electric Meters
Topic: Omnimeter 1 v.3 and the magic smoke
Replies: 4
Views: 3299

Re: Omnimeter 1 v.3 and the magic smoke

Thanks Jameson, It looks like it took out the grounding part of the burden circuit. From what I can tell, terminals #2, #4 and #6 are connected together and then connected through R4 and R67 to Neutral. Technically I don't need L3, but it would be nice to have a fully functioning meter. Also, if you...
by ianf
Mon May 10, 2021 1:35 pm
Forum: Developers Sandbox - Meter Data
Topic: C code/library for EKM Omnimeter
Replies: 0
Views: 1279

C code/library for EKM Omnimeter

Hi This is something that I meant to make publicly available around 7 years ago. Hopefully it will help someone here read data from the meters. Originally, I intended to add support for several meters, but I only ever had access to the Omnimeter 1v.3. The intention was to use unions to handle multip...
by ianf
Mon May 10, 2021 12:52 pm
Forum: Electric Meters
Topic: Omnimeter 1 v.3 and the magic smoke
Replies: 4
Views: 3299

Omnimeter 1 v.3 and the magic smoke

Hi,

I made an off-by-one error wiring up L1 into #6 (CT3 connection) rather than #7 due to parallax . That side of the CT terminals is connected to #10 (N) so it blew up the trace R4 and R67 :oops: . Could you by any chance tell me the values of those 2 resistors so I can attempt a repair?

Ian
by ianf
Tue Jan 08, 2013 11:59 pm
Forum: Developers Sandbox - Meter Data
Topic: Very odd readings
Replies: 3
Views: 6351

Re: Very odd readings

I've just tried reading meter data using EKM Dash and it's refusing to read anything other than the "General" and "Advanced" tabs (it complains when I click on rates and Data). Yes, that will most likely be the iSerial TCP retransmit bug I mentioned in another thread. You're pos...
by ianf
Tue Jan 08, 2013 11:54 am
Forum: Developers Sandbox - Meter Data
Topic: Very odd readings
Replies: 3
Views: 6351

Re: Very odd readings

I had something similar happen to one of my meters where some of the internal settings were corrupted by a slew of power failures and brown-outs. If your kWh counter now runs at a different rate you have the same issue I had (mine ran at 1 tenth pace). Setting the CT ratio back to the original value...
by ianf
Fri Jan 04, 2013 11:32 am
Forum: Developers Sandbox - Meter Data
Topic: CRC16 help
Replies: 8
Views: 17232

Re: CRC16 help

I'm trying to get the CRC16 algorithm going in Java... but I must admit bitwise operations aren't my strong point. This is what I've done with the EKM-provided CRC16 C-code (an attempt to translate it to Java) : public int ekmCheckCrc(byte[] dat) { int crc = 0xffff; for (int i = 1; i < dat.length-3...
by ianf
Fri Jan 04, 2013 4:28 am
Forum: Developers Sandbox - Meter Data
Topic: EKM-Omnimeter RS-485 Data
Replies: 44
Views: 80008

Re: EKM-Omnimeter RS-485 Data

2. The Maximum Demand field is 8 bytes, not 7. EKM-- 2. Thank you very much for catching the typo! The Maximum Demand is 8 bytes in the EKM-Omnimeter return string. We really appreciate the heads up and will update this document. I'd like to correct this further. It appears that the Maximum Demand ...
by ianf
Sat Jul 07, 2012 2:16 pm
Forum: Developers Sandbox - Meter Data
Topic: EKM-Omnimeter RS-485 Data
Replies: 44
Views: 80008

Re: EKM-Omnimeter RS-485 Data

Jameson wrote: EKM-- 1. I think you may be referring to the 4 different time periods the meter returns. The Omnimeter itself keeps track of how many kWh both Total and Reverse have been used in each of 4 time periods.
Ah, silly me. I was thinking phases, not ToU.

Ian
by ianf
Fri Jul 06, 2012 12:02 pm
Forum: Developers Sandbox - Meter Data
Topic: EKM-Omnimeter RS-485 Data
Replies: 44
Views: 80008

Re: EKM-Omnimeter RS-485 Data

I have a couple of questions and comments after reviewing the V3 meter parsing document. 1. The example shows energy accumulation for 4 transformers. Which meter has a 4th CT input? 2. The Maximum Demand field is 8 bytes, not 7. 3. WRT the date. Capturing network data yields: 0157 3102 3030 3630 283...