JUMO 902820 PROCESStemp RTD Temperature Probe for Process Technology (Also with ATEX Approval) Ex i Operating Manual - Manual (Page 3)

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1 Equipment and intended application
RTD temperature probes from JUMO are used as intrinsically safe and/or flameproof equipment for
temperature measurement in liquid and gaseous media, as well as for dusts. The thermometers consist of a
protection fitting with various process connection options, a terminal head or a connecting cable, and an
interchangeable measuring insert (depending on the type). All fittings in contact with the process media
undergo a leakage test. The Pt100 temperature sensors mounted in the fittings are to EN 60751, in
tolerance classes A or B, in a 2-, 3-, or 4-wire circuit (see Section 8). It is also possible to use these sensors
with a higher reference value (Pt500; Pt1000; Pt2000; Pt5000). NTC sensors, such as KTY, or other PTC
sensors may also be used. Versions with two or three measurement circuits can be provided.
A transmitter can be integrated into the terminal head, for measurement transmission with a standard signal
(e.g. 4 to 20 mA).
The thermometers fulfil the requirements for Explosion Group II in Categories 1 G and 1 D as well as 2 G
and 2 D. They are thus suitable for use in areas with an explosion hazard: Zone 1 or Zone 2 with gas (Gas)
and Zone 21 or 22 with dust (Dust). Depending on the circumstances, it may be permissible for the probe
stem to protrude into the Zone 0 or 20 area (zone separation).
The thermometer parameters that are specific to a given type can be found in the corresponding
technical data sheet/detail drawing (see attachement) and/or on the label that is affixed to these
operating instructions.
Depending on the measurement task and the application requirements, the RTD temperature probes are
available with different terminal heads, a variety of process connections, matching pockets, with or without a
interchangeable measuring insert, and with or without a fitted connecting cable.
RTD temperature probes with type Ex "i" protection are certified for connection to intrinsically safe circuits in
Category ib (for use in Zones 1 and 2, with an isolator in Zone 0) and in Category ia (where the stem is in
Zones 0, 1 or 2).
RTD temperature probes in flameproof enclosure (terminal head and cable gland) are also equipped with
intrinsically safe measuring inserts for connection to intrinsically safe circuits.
When connecting up to circuits that are not intrinsically safe, the user must ensure that the power applied is
limited in such a way that the maximum rise in surface temperature is no greater than that specified for the
temperature class minus the safety reserve!
See also Section 5 “Technical data” of these operating instructions.
2 Marking
The designation for the RTD temperature probes used is marked on the terminal head or permanently
attached nameplate. For every RTD temperature probe that is marked by an individual type designation (e.g.
90.2800.9101) there is a corresponding probe-specific drawing and data sheet. The appropriate marking
ensures that all sensors are unambiguously identifiable and traceable. The probe-specific values can be
found in the drawing, the technical data sheet and/or the label that is affixed to these operating instructions.
3 Safety notes
The technical data that are relevant to the use of the device in an area with an explosion hazard (Ex area)
are presented in the detail drawing corresponding technical data sheet and/or the label that is affixed to
these operating instructions.
Only operate RTD temperature probes according to their intended use and in a clean and undamaged state!
It is not permissible to make any alterations to the RTD temperature probes. In such a case, proper fault-free
operation is no longer assured. The guarantee is also invalidated by any alterations. When exchanging
measuring inserts, use only original JUMO replacement parts of the same type.
The national and international safety and accident prevention regulations must be followed for installing and
working with RTD temperature probes. Furthermore, the operator of the plant or system is responsible for
the observance of legal requirements. If lead extensions are used, the specified (length-dependent) limits for
capacitance and inductance must be observed.