Which is more reliable, on-site calibration or external calibration?
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From the standpoint of calibration result dependability, there is no discernible difference between the two approaches under the assumptions of compliance and qualifications. The relevant cases are the only distinction. The particular ruling is as follows:
1. Fundamental Requirements for Reliability Judgment
Regardless of the service technique, the calibration findings are dependable as long as the institution possesses CNAS/CMA metrology credentials and the given certificate is legitimate. Even on-site calibration results won't be trustworthy if the institution isn't qualified.
2. Comparing Reliability in Various Situations
Object of Calibration
Reliability of External Calibration
Reliability of External Calibration
In conclusion
The Fluke Temperature Monitoring Device's Self-Calibration
It is more dependable to calibrate externally.
The reliability of external calibration is marginally worse.
Higher-level metrology standards are used at Fluke's official metrology laboratory for external calibration, which produces a more stable environment, more comprehensive calibration items, and more accurate results.
Setting Up a Hot Runner Sensor
It is more dependable to calibrate externally.
Is external calibration more trustworthy? No, the exact opposite.
After installation, on-site calibration is carried out under real-world production settings, precisely reflecting the sensor's actual deviance. Compared to sending the sensor for calibration (laboratory environment calibration), the calibration compensation coefficient is more reliable and better able to compensate for faults brought on by actual operating conditions since it is more closely aligned with actual production.
3. Synopsis of Avoiding Difficulties
Choose official calibration if you're calibrating your Fluke equipment because it's less expensive, offers a consistent environment, and produces more dependable results.
Select a third-party on-site calibration service with CNAS accreditation if you are calibrating a hot runner sensor on a production mold. The outcomes are much less expensive than Fluke's official on-site service, more dependable than removing the sensor for calibration, and more in line with real operating conditions.
