Do bimetallic thermometers need to be calibrated regularly?
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Dear sea friends, I would like to ask whether bimetallic thermometers and thermocouples also need to be calibrated regularly, just like pressure gauges? If necessary, specify how often it should be verified; I couldn’t find any relevant regulations
Thermometers do not require regular calibration, while pressure gauges are subject to mandatory regulations
If a thermometer needs to be calibrated regularly, the interval is one year. (The validity period of the calibration certificate is 1 year.) **It is not mandated by the regulations, but safety inspection agencies will conduct checks. If you think it’s necessary, go for an inspection; if not, just put a sticker on it~
I remember that thermocouples need to be calibrated; I can’t recall the details exactly, but it seems they do need to be calibrated. At least the cold-junction compensation built into the safety barrier isn’t very reliable – it often fails to provide accurate compensation. Sometimes, even changes in temperature inside the cabinet can cause inaccuracies
Normally it is done once a year; it is recommended that customers do it every 6 months if they can afford to
Regular calibration is required; for general process quality control, it is carried out once a year. If the data requirements are not high and it is used only for general monitoring purposes, the calibration interval can be extended. Refer to JJG226-2001 \"Verification Regulations for Bimetallic Thermometers\"....
Yes, we require an annual inspection.
Yes, we require an annual inspection.
If they are not installed at critical measurement points, we classify them as Category C and use a one-time calibration method – the calibration is carried out at the time of installation, and a Category C label is attached; they are replaced only after they break down. New instruments must pass calibration before being installed. For items such as thermocouples and thermal resistors, as well as those related to interlock shutdown functions, it is necessary to set a calibration cycle of one year for safety reasons. Your company can create its own procedural management documents to define the classification categories and determine the calibration cycles; there are no regulations that require thermometers to be inspected regularly (on an annual or biannual basis).