国家有强检计量设备的目录，检定周期在相应的检定规程中有，有1年、2年或3年。一般周期要比要求短，而且设备有损坏更换重要部件或者对设备的性能有怀疑时也应进行检定或校准。

请参照CTL OP-111 6.2.1有明确定义
6.2
Calibration Intervals for Test Equipment Requiring Calibration
6.2.1
All 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.

不允许给再校时间，可他还是给了，还不是事业单位呢。我到是见人家民营企业过来校准，证书上还稍微委婉点说是建议复校时间。其实大家平时的做法就是看校准证书上的复校时间，很多审核老师也是关注你的证书有没有过复校时间……

校准周期是按照检定规程里来的,但我们的设备会自己一般按照3-6个月的时间进行期间核查.

不一定，一般那些仪器检定规程里有