For any wire measuring system, the serial number is not on label but on display. Please turn on the device and read the displayed number.
Check that the paper is well fixed and the nut is screwed in the right sense. If everything is correct, the battery might be down. In this case, replace it by pulling out the mechanism. Battery is placed behind the chart under the mechanism.
Adjustment is forbidden for any recorder compliant with EN 12830 norm.
All deep-freezer rooms used for storing or for the transportation of perishable food products must have an EN 12 830 compliant temperature recorder.
JRI offers metrological services allowing you to meet regulatory requirements.