... and by wareform. According to crest factor, K factor, THFF etc., the user can analyze ... pulse output- /C: Communication RS485 (Modbus-RTU)- /K: Logic input (DI) 4 drying contact inputs, with ... voltage. In Europe, CCITT detects harmonic interference to telecom with Pn, then gures it with THFF. ... indicates a linear load (no harmonics). The higher the K-factor, the greater the harmonic heating effects. - ...