The core frequency principle for calibrating digital portable push-pull force testing instruments is "dynamically adjusted according to usage intensity+scenario risk+regulatory requirements". The conventional basic frequency is once a year, and high-frequency or high-risk scenarios need to be shortened to once every 3-6 months.
1、 Core calibration frequency division
Conventional usage scenario (daily use ≤ 4 hours, testing common materials such as plastic and fabric): Calibrate once a year, and conduct a simple check every 3 months (using standard weights to quickly verify the indication deviation).
High frequency usage scenarios (daily use ≥ 8 hours, such as continuous testing on production lines): Calibrate once every 6 months to ensure the stability of instrument readings under high loads.
High risk/high-precision scenarios (testing critical products, safety components, or used for trade settlement, quality arbitration): Calibration is required every 3-6 months, and some industries (such as automotive and aviation) require synchronous calibration according to production batches.
Low frequency usage scenario (≤ 5 times per month, such as occasional laboratory sampling): It can be extended to calibrate once every 12-18 months, but standard parts need to be quickly checked before each use.
2、 Special circumstances that trigger additional calibration
After collision, drop, and maintenance (such as replacing sensors, display screens, and internal circuit boards), the instrument needs to be calibrated immediately to confirm that there is no accuracy deviation.
If there is an abnormality in the test data (such as the deviation of multiple test results of the same sample exceeding the allowable error of the instrument, or the deviation compared with standard equipment is too large), it is necessary to suspend use and calibrate in a timely manner.
If there is a drastic change in environmental conditions (such as long-term use in high temperature, high humidity, and vibration environments), or if the instrument is put back into use after being idle for a long time, additional calibration is required.
Industry regulations or customer specific requirements (such as some medical device industries requiring quarterly calibration) require higher standards to be followed.
3、 Key requirements for calibration execution
Calibration needs to be completed by qualified third-party organizations or manufacturers, using traceable standard weights or force sensors. The calibration report should include key parameters such as indication error, repeatability, and return error.
In daily use, it is necessary to record the duration of instrument use, number of tests, environmental conditions, and abnormal situations as the basis for adjusting the calibration frequency.
Simple verification can be operated by oneself: hang a standard weight with known accuracy (such as 10N, 50N, 100N) at the measuring head of the instrument, read the deviation between the displayed value and the standard value. If the deviation exceeds the maximum allowable error of the instrument (usually ± 0.5% FS), it needs to be calibrated in advance.