... time setting: 10min-90 min automatic shutdown can be set.9, High quality charging power: 100-240v of charging voltage can ... /AC, Continuous operating time of battery,6~8 hours7, Stability, temperature drift: 0.2uV/°C(0-60°C),Null drift,≤ 0 ... .1%/8 hours /FS8, Calibration range: full-scale calibration.9, Ambient temperature: 0~ 60°C.10, Ambient humidity: ≤ 80%.11, Allowable ...