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hardware:channels:meters:power:swissnox_s-watt

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hardware:channels:meters:power:swissnox_s-watt [2013/01/12 02:04] – [Calibration] finalhardware:channels:meters:power:swissnox_s-watt [2018/03/25 11:03] jau
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 I verified this, by counting the 7755 pulses between the pulses of the normal S0 output. They are exactly the value 0x03 of the eeprom! I verified this, by counting the 7755 pulses between the pulses of the normal S0 output. They are exactly the value 0x03 of the eeprom!
  
->> Please note that those 410.000 imp/kWh are apparently not "set in stone"I just modified one of my S-Watts according to the manual described here. Unfortunately I don't have the opportunity to read the eprombut my measurements resulted in 246 "new pulses" per "old pulse", or 492.000 imp/kWh (error rate is <1%). I have 9 more devices to modify and will report my findings shortly.+Note that 410.000 imp/kWh are not set in stone. After modifying 16 S-Watts and recalibrating them using actual measurement rather than reading the EEPROMI found that mine are now between 242 and 256 times faster than before (that would be between 484.000 and 512.000 imp/kWh). Every S-Watt will behave differently after the modification and every one needs to be calibrated.
  
-Note that the length of a pulse drops from 70-90ms per impulse before to 0.5ms after the modification.+== Impulse Width == 
 + 
 +The width (duration) of an impulse drops from 70-90ms to 0.5ms after the modification. Depending on what counter you use and how many S-Watts you like to keep track of, it could be easy to miss a few pulses, so it is important to keep this in mind. 
 + 
 +It is also likely that with currents greater than 13 amperes (roughly 3000 Watts), the impulse width might decrease even further. Assuming we have an S-Watt measuring 10.000 Watts (it is certified up to 50 amperes = 11.500 Watts) and it produces 500.000 imp/kWh, we'd have 500.000 impulses every 6 minutes, or (roughly) 100.000 imp/min, or ~1400 imp/s. It is unknown to me how the S-Watt would handle such high impulse frequencies.
 ==== ToDo ==== ==== ToDo ====
   * <del>Calibrate</del>   * <del>Calibrate</del>
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 >>> In my device, CF is connected to portA.0, your schematic connects CF to portB.3, which is i2c SCL in my device. >>> In my device, CF is connected to portA.0, your schematic connects CF to portB.3, which is i2c SCL in my device.
  
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hardware/channels/meters/power/swissnox_s-watt.txt · Zuletzt geändert: 2018/03/25 11:08 von jau