Product description Prothermo NMT81
8 Endress+Hauser
2.4 Operational safety
Risk of injury!
‣
Operate the device only if it is in proper technical condition, free from errors and faults.
‣
The operator is responsible for interference-free operation of the device.
Hazardous area
To eliminate danger to persons or the facility when the device is used in the hazardous area
(e.g. explosion protection):
‣
Check the nameplate to verify if the device ordered can be put to its intended use in the
hazardous area.
‣
Observe the specifications in the separate supplementary documentation that is an integral
part of these instructions.
2.5 Product safety
This measuring device is designed in accordance with good engineering practice to meet state-
of-the-art safety requirements, has been tested, and left the factory in a condition in which it
is safe to operate. It meets general safety standards and legal requirements.
NOTICE
Loss of degree of protection by opening of the device in humid environments
‣
If the device is opened in a humid environment, the degree of protection indicated on the
nameplate is no longer valid. This may also impair the safe operation of the device.
2.5.1 CE mark
The measuring system meets the legal requirements of the applicable EU Directives. These are
listed in the corresponding EU Declaration of Conformity along with the standards applied.
Endress+Hauser confirms successful testing of the device by affixing to it the CE mark.
3 Product description
3.1 Product design
NMT81 converter + average temperature probe version can be equipped with class A IEC
60751/DIN EN 60751 or class 1/10B Pt100 4-wire RTD sensor elements in its protective
probe for up to 24 elements. It is able to accurately measure the temperature of each element
by measuring its temperature dependent resistance. NMT81 converter + temperature probe
version conforms to intrinsic safety standards, and because NMT81 consumes very little
power, it guarantees superior safety as an electrical device that is installed in tanks in
hazardous locations, and ecological/environmentally friendly as well.
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