Endress+Hauser S TR65 Specifications
Technical Information
71105552
Omnigrad S -TR65
RTD thermometer EEx-d or EEx-ia certified, no replaceable insert,
process connection: threaded welded and threaded compression fitting.
PCP (4...20 mA), HART® or PROFIBUS-PA® electronics
Range of uses
The Omnigrad S TR65 is an RTD industrial thermometer,
developed for use in the fine chemicals and petrolchemical
industry but also suitable for generic industrial applications.
In compliance to EN 50014/18/20 (ATEX certification) it is
therefore particularly suitable also for hazardous areas.
When required, it’s also available with a transmitter
(PCP, HART® or PROFIBUS-PA®) into the housing.
The TR65 is available in different configurations, can also be
configured with specific dimensions and characteristics
depending on process requirements.
The installation on the plants normally needed a special process
connection: a compression fitting.
Application areas
• Fine chemicals industry
• Petrochemical industry
• Light energy industry
• General industrial services
• Environmental engineering
TI283T/02/en
Features and benefits
• Customized immersion length
• Aluminium housing, with protection grade from IP66 to IP68
• Mineral oxide insulated insert (MgO cable) diameter: 3 or 4, 5
or 6 or 8 mm
• Process connection fixed under housing or sliding and spring
loaded on the insert sheath (inox compression fitting)
• PCP, HART® and PROFIBUS-PA®, (4...20 mA
2-wire transmitters into the housing)
• The accuracy of the sensing element (Pt100) is: class A or 1/3
DIN B (IEC 60751) with electrichal connection to
2, 3 or 4 wires
• The sensing elements (Pt100) are available in wire-wound
WW (range:-200...600°C) or thin-film TF (range:-50...400°C)
with single or double Pt100 execution
• ATEX 1/2 GD EEx-ia certification
• ATEX 2 GD EEx-d certification
4 0
Omnigrad S -TR65
Function and system design
Measuring principle The RTD (Resistance Temperature Detector), is a sensor where the electrical resistance varies with the tem
perature. The material of the RTD is Platinum (Pt) with a value of the resistance (R), referred to a nominal value
at the temperature of 0°C = 100,00 Ω (in compliance to rule IEC 60751; it is called Pt100). The very important is to define the RTD; it is defined with a standard "α" value measured between 0°C and 100°C.
This value is: α = 3.85 x 10
The temperature is measured indirectly by reading the voltage drop across the sensing resistor in the presence
of a constant current flowing through it using Ohm’s. The measuring current should be as small as possible to
minimise possible sensor selfheating; normally this current is around 1mA, no higher.
The resistance value measured for each degree is about = 0,391 Ohm/K; over 0°C it is opposite proportional
at the temperature. The standard RTD connection at the plant instrument can be to 2, 3 or 4 wires to simple
or double RTD element.
Equipment architecture The construction of the TR65 temperature sen-
housing
fixed process
connection
insert
-3
°C-1.
insert
housing
sliding process
connection
(compression fitting)
sor is based on the following standards:
•EN 50014/18 (housing)
•Neck (Fixed or sliding process connection)
•IEC 60751 (insert and sensing element).
The housing is in painted aluminium alloy; it is
suitable to contain a transmitter and/or the
ceramic block of the insert; the “Ingress Protection” is from IP66 to IP68.
The process connections of the TR65 are: compression fitting (sliding or spring loaded), fixed
process connection, threaded (M, GAS or NPT,
see the section "System components").
The inserts diameter is 3 - 4,5 - 6 - 8 mm and are
composed by MgO cable (SS 316L sheath) with
a sensing element (Pt100 ohm/0°C) positioned
at the MgO cable tip. The standard elettrical
connection is to 2, 3 or 4 wires for sensing element (Pt100).
Material & Weight
Operating conditions
Fig. 1: TR65 with the various types of process connections (fixed or fitting) and parts of the insert.
Housing Insert Process connection Weight
aluminium epoxy
coated
sheath in SS
316L/1.4404
fixed or sliding or sping loaded in
SS 316/1.4401
from 0.5 to 1.0 kg for standard
options
Performance
Operating condition or test Product type or rules Value or data of test
Ambient temperature housing (without head-mounted transmitter) -40÷130°C
housing (with head-mounted transmitter) -40÷85°C
Process temperature Sliding (e.g. TA 50) compression fitting Sleeve in SS max 400°C
Fixed process connection: same of measurement range taking care to ambient temperature (fig. 4)
Maximum Process pressure (e.g. TA 50) compression fitting Sleeve in SS 8 MPa (80 bar) at 20°C
Fixed process connection
Maximum flow velocity The highest flow velocity tolerated by the insert diminishes with increasing lengths of
the probe exposed to the stream of the fluid.
Shock and vibration resistance
test
RTD insert in according to the rule IEC
60751:
Acceleration 3 g of peak
Frequency from 10Hz to 500Hz and
back
Time of the test 10 hours
2 Endress+ Hauser
Omnigrad S -TR65
Accuracy
RTD maximum error type TF - Range: -50 to 400°C
Cl. A 3σ = 0.15+0.0020It|
3σ = 0.30+0.0050ItI
Cl. 1/3 DIN B 3σ = 0.10+0.0017It|
3σ = 0.15+0.0020ItI
3σ = 0.15+0.0020ItI
3σ = 0.30+0.0050ItI
= -50…250°C
= +250…400°C
= 0…100°C
= -50...0
= 100...250°C
= 250…400°C
DIN-IEC-EN 60751
2,0
Class B (°C)
1,5
1,0
Class A (°C)
Tolerance
0,5
-200 -100 0 100 200 300 400 500 600°C
Class 1/3 DIN B (°C)
±3σ = range including 99.7% of the readings. (|t|= absolute value of the temperature in °C).
RTD maximum error type WW - Range: -200 to 600°C
Cl. A 3σ = 0.15+0.0020It| = -200…600°C
Cl. 1/3 DIN B 3σ = 0.10+0.0017It|
3σ = 0.15+0.0020ItI
3σ = 0.15+0.0020ItI
= -50...250°C
= -200...-50
= 250…600°C
-200 -100 0 100 200 300 400 500 600°C
2,0
1,5
1,0
Tolerance
0,5
DIN-IEC-EN 60751
Class A (°C)
Class 1/3 DIN B (°C)
±3σ = range including 99.7% of the readings. (|t|= absolute value of the temperature in °C).
Others errors
Transmitter maximum error See the corresponding documentation (codes at the end of the document)
Display maximum error 0.1% FSR + 1 digit (FSR = Full Scale Range)
The “4 wires” configuration, is provided as a standard connection for the single Pt 100’s excludes additional
errors in every condition.
Generally in the “4 wires” configuration there is a higher guarantee of accurancy.
Response time Tests, with the RTD insert, in water at 0.4 m/s (according to IEC 60751); from 23 to 33°C:
Insulation
Stem diameter of the insert Sensing element type Time for 50% or 90% of
temperature step
6 mm TF / WW t
3 mm TF / WW t
50
t
90
50
t
90
Measurement Insulation type Result
Insulation resistance between terminals and probe sheath above 100 MΩ at 25°C
According to IEC 60751, test voltage 250 V above 10 MΩ at 300°C
Response time
3,5 s
8,0 s
2,0 s
5,0 s
Self heating Negligible when the E+H iTEMP® transmitters are employed.
Endress+Hauser 3
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