... of signals of V, mV, mA, Ωand thermalcouple(TC), thermal resistance(RTD)4. Frequency measurement(Hz) and simulation function5. 24 VDC ... . AC and DC, built-in high capacity of chargeable lithium battery, it can work for more than 8 hours for one ... measurement for pressure.Technique Index1. Power supply: built-in imported lithium battery or external power of AC220V/50Hz2. Usage temperature: (0-50 ...