Pair temperature probes with different cable lengths
October 2019
Temperature Measurement
In heat meters for heating systems, two paired temperature probes are usually used for symmetrical installation. These must have identical cable lengths to comply with the legal regulations. Now, Jumo has developed a technology that enables the implementation of different cable lengths with one probe. Costs are reduced as a result.
The new process enables different sleeve types, cable colours and identification markings for one temperature probe pair. These combinations are available for all OEM versions that have a current design type and have that type examination certificate. The only limitation is that the temperature pairs that have different versions must be firmly connected to the arithmetic unit and that they must not be exchanged (this is for so-called compact heat meters). In addition, the user must declare conformity for the compact heat meter if the unit is for commercial purposes. The Jumo type examination certificate can be used as a reference.
As a market leader for temperature probes for heat meters, Jumo has decades of experience in R&D; of new products for this industry. The new technology means that the sensors – compared to normal pairing – are paired in the temperature probes using a newly-developed process. The different cable lengths cause a difference in the electrical resistance at the end of the probe.
This difference can be calculated and transmitted to the customer via data sheets or via the content of a 2D barcode on the label. The barcode also contains other data such as characteristic line parameters, probe data, approvals or even customer-specific texts.
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