◆ Print: Reserved printer interface to connect an external industrial micro-printer (optional);
◆ Storage: 20000 data; standard UPS to prevent loss of data in the case of power failure; automatic coverage of earliest data when the memory is full; (the memory with a capacity of 40000 data may be added;)
◆ Communication interface: One-channel RS232 digital interface or RS485; support the MODBUS communication protocol or self-defined protocol; 1-channel analog signal: 4-20 ma (with the range corresponding to 20 ma adjustable);
◆ Pretreatment system: Standard pretreatment system with such functions as auto cleaning, back flushing and precision filtration to ensure good representativeness of samples and avoid pipe blockage by large suspended particles (optional); it can be used separated from the main machine;
◆ Overall dimensions: 900*600*450 (mm);
◆ Weight: 50 kg;
◆ Power supply: AC220 V±20%, 50 HZ±1%;
◆ Power: 300 W;
◆ Ambient temperature: 5-40 °C;
◆ Ambient humidity: ≦85%;
◆ Measuring method: Alkaline potassium persulfate high-temperature digestion – spectrophotometric method (improved based on the method described in GB11894-89).