Operation Manual for DS-RF Selective HCHO Module Selective Formaldehyde Module Model： DS-RF

Operation Manual for DS-RF Selective HCHO Module Brief Introduction DS-RF selective formaldehyde module can detect HCHO, VOC, TVOC, t & RH at the same time. The module combines selective HCHO sensor with advanced electronic control technology, converting HCHO concentration into PPM directly. The module realizes the detection of VOC and TVOC based on fuel cell technology. DS-RF selective HCHO module is free from the influence of the interference gases, such as C2H5OH, C6H6, NH3, CO, etc. DS-RF selective HCHO module is pre-calibrated in the factory and can be integrated into your system directly....

6 Operation Manual for DS-RF Selective HCHO Module Technical Specification Cross Sensitivity of HCHO

Operation Manual for DS-RF Selective HCHO Module Concentration of Interference Gas(ppm) General Settings Module makes use of serial communication. Communication configuration parameters are: Baud rate Data bits Communication Command There are two communication types: active upload type and Q&A type. The default type is active upload and it sends gas concentration once every second. Commands are as follow: reserved C-high C-low C-high C-low C-high C-low 0X05 RH-low Checksum temperature = t-high + (t-low / 100 ) humidity = RH-high + (RH-low/ 100)

Operation Manual for DS-RF Selective HCHO Module

Operation Manual for DS-RF Selective HCHO Module Checksum calibration /************************************************************************* *Function name：unsigned char FucCheckSum(uchar *i,ucharln) *Function description：checksum calibration[Take Not(Byte1+Byte2+…Byte7) +1] *Note：Take Not(Byte1+Byte2+…ByteX (X>2) *************************************************************************/ unsigned char FucCheckSum(unsigned char *i, unsigned char ln) { unsigned char j, tempq=0; i+=1; for(j=0; j<(ln-2); j++) { tempq+=*i; i++; } tempq=(~tempq)+1; return(tempq); } Avoid changing or moving sensor...