... Instrument stability of absorbance ≤ 0.005A/20min;6) Temperature accuracy: test solution temperature is 37 °C, 30 °C, 25 °C, ... display: equipment used in English operating system;2) self-examination: Power On Self Test function instrument has, boot the system if it ... LCD screen prompts the user;3) Select the filter: Test items filter required by the instrument automatically selects the settings ...