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电容薄膜规能够测量的最低压力是根据规的零点不稳定度来确定的.通过对14个不同温控规的稳定性进行系统研究之后.发现大多数规的不稳定与室温变化有关.有时不同规的变化相差达三个数量级.所以强调用户在使用时估计规的稳定性是必要的.在另一种情况下.零点一周之内漂移很小.但温度变化很快时零点漂移的值偶然变大并常常出现不连续变化.观察最稳定的规是在几天之内变化小于满量程的百万分之一.面在一小时之内变化.01%.在比较高的压力下、规的读数精度是由规校准系数的长期稳定性来确定.在一年内单独校准了多次并记录了17个校准规,漂移范围在2%以内基本上没有变化.平均值是0.45%。除此之外、没有出现随时间的静态漂移.但校准之间热偶也有不规则漂移.
The lowest pressure that can be measured by the capacitive film gauge is determined by the zero-point instability of the gauge. After a systematic study of the stability of the 14 different temperature-controlled gauges, most of the gauge irregularities were found to be related to room temperature changes. Therefore, it is emphasized that it is necessary to estimate the stability of the gauge when the user is in use. In another case, the drift within zero point is small within one week, but the drift of zero point when the temperature changes rapidly Values occasionally become larger and often show discontinuous changes. Observations The most stable gauge changes in less than a millionth of a full scale in a few days. The surface changes within an hour .01%. At higher pressures The gauge reading accuracy is determined by the long term stability of the gauge calibration factor, calibrated multiple times over the course of a year and recorded 17 calibration gauges with virtually no change in drift range of 2% with an average of 0.45%. In addition, there was no static drift over time, but the thermocouples also drifted irregularly between calibrations.