Abstract : a portable digital instrument for multi - using ( multi - parameter ) is introduced . it includes the function of vacuometer , atmospheric pressure altimeter , thermometer ( environment ) and pressuremeter ( for example the standard pressuremeter of sphygmomanometer calibration ) 文摘:介紹一種便攜、數(shù)字式的多用途儀器,它具有真空度計、氣壓高度計、 (周圍環(huán)境)溫度計以及壓力計(例如可作為校準血壓計的標準器)等功能。
4 . the thrust measurement device was calibrated , and the accuracy was 2 % fs . at the same time the signal of thrust measurement was input to the computer . e - type chromel - constantan thermocouple was used to measure the temperature of mpt , and the accuracy was 5 % fs . the vacuum measurement was realized by using zdf - 5427m vacuometer , and the accuracy was 3 % fs ( 4 )對推力測量系統(tǒng)進行了標定并實現(xiàn)了計算機采集,推力測量系統(tǒng)最大相對誤差為2 fs ;溫度測量目前還只限于對mpt諧振腔壁溫的測量,使用e型鎳鉻?康銅熱電偶即可較容易實現(xiàn),其測量精度為5 fs ;真空測量采用zdf - 5427m微機型復合真空計,其由熱偶計和熱陰極電離計復合而成,該真空計測量控制精度為3 fs 。