chouy01
第15楼2013/06/29
有一个IEC OP文件有些规定。校准周期是由实验室根据相关因素评估后确定。
Requirements for Traceability of Calibrations and Calibration Intervals CTL-OP
7.2.1All test equipment requiring calibration shall undergo an initial calibration before being put into service. Thereafter, the maximum nominal calibration interval shall be:
A. One year for electrical, electronic and mechanical test equipment.
B. Three years for mechanical test equipment made of solid materials not subject to deterioration.
C. As recommended by the manufacturer of the instrument.
D. Test equipment that is "fail safe" in that failure would be evident to a user (with laboratory procedures requiring the user to check the equipment before use) may be put on the status of "Initial Calibration Only (ICO)". Examples of the equipment that can be placed on ICO status are: steel rules, tape measures, weights 4,5 kg or more calibrated to +/-1% tolerance, single piece steel probes greater than or equal to 3 mm diameter with blunt ends, graduate cylinder, thermometers, steel impact balls, steel or plastic probes with no moving parts and sufficient structural integrity so as to not deform.
7.2.2Weights do not need to be calibrated if verified with a calibrated scale before each use. The verification must be documented.
7.2.3 Test equipment that is delicate, subject to frequent usage or severe use conditions shall be assigned shortened calibration intervals (e.g. 6 months, 3 months, weekly, before each use).
7.2.4 Infrequently used test equipment may be assigned the status of "calibrate before use" instead of a periodic calibration.
7.2.5 Calibration intervals may be extended based on the following and the reasons must be documented:
vivi_vivi
第19楼2013/07/30
是哩....忙的我吐血...我还是兼职管计量的.....
我们一般精密设备都是一年一校准,两年一校准的设备一般是那种大型步入式箱子,因为数量多,所以两年一校准也能说得过去。
还有就是送国外校准的设备,周期也是两年一校准,因为来来回回一趟费时几个月,每年校准费用,时间都吃不消。
两年一周期的设备,我会内部实验室间做比对的,找来各个地区子公司,大家一起做对比,然后证明下我们设备OK.
而且,开机前都会测试一下设备性能,设备数据没有异常后才能使用。
CNAS说实话是不太能接受周期两年,不过跟他们解释解释也没有再坚持了。
妮称
第20楼2013/07/31
谢谢VIVI, 我们现在碰到个关于设备校准结果的确认和贴标签的问题.
我们的校准结果确认是先由设备工程师确认再由技术负责人确认, 设备工程师拿着校准报告和设备说明书上的最大允许误差去做比较, 而技术负责人是用校准结果和测试要求去对, 目前是CTL决议.
标签有绿色合格标签, 黄色限用和红色禁用标签.
绿色合格标签是根据设备工程师的确认结果来贴还是技术负责人的确认结果?
象万用表这类的, 其实平时我们只用它来测电流电压功率, 其它一些功能都不用也没有校准, 不知是贴绿色合格标签还是黄色限用标签?
你们是怎么做的呢?