7
TECHNICAL DATA
42
TT 51 SERIES
www.krohne.com
08/2015 - 4000754203 - MA TT 51 R03 en
7.2 Technical data
INFORMATION!
•
The following data is provided for general applications. If you require data that is more
relevant to your specific application, please contact us or your local sales office.
•
Additional information (certificates, special tools, software,...) and complete product
documentation can be downloaded free of charge from the website (Downloadcenter).
Measuring system
Application range
Temperature, resistance or voltage measurements of solids, liquids and
gases in industrial environment.
Design
Versions
Versions
Versions
Versions
TT 51 C
In-head transmitters which are intended for installation in a "B connection
head" or larger according to DIN EN 50446.
This transmitter is optionally available in an intrinsically safe version (zone
0, 1 and 2) for installation in potentially explosive atmospheres.
TT 51 R
Rail-mount transmitters which are intended for installation on a rail
according to DIN 50022 / EN 60715.
This transmitter is optionally available in an intrinsically safe version (zone 1
and 2) for installation in potentially explosive atmospheres.
Features
Features
Features
Features
SIL 2 compliance
Based on a certificate issued by SP (Technical Research Institute of Sweden)
acc. to IEC 61508 part 1 to part 3, the transmitters are suitable for use in SIL
2 rated Safety Instrumented Systems (SIS).
HART
®
6 compliance
The transmitters are fully compliant with the HART
®
6 protocol as well as
the previous HART
®
5. HART
®
6 offers the possibility to receive diagnostic
information such as sensor errors or sensor conditions, input wiring
resistance too high, sensor backup mode, transmitter error, etc.
Sensor backup
Dual-sensor input allows for backup between two sensors. Should a lead
break or short-circuit be detected on one of the sensor circuits, an
automatic switchover to the intact sensor will occur.
Sensor drift monitoring
If an RTD or thermocouple with double sensor elements is used, sensor drift
can be detected by checking the reading from both elements. If the
difference is above a user-defined level, this will be indicated in ConSoft and
with a diagnostic HART
®
message, and the output signal can be forced
upscale or downscale.
Sensor isolation monitoring
The isolation resistance of thermocouples and RTD
’
s as well as the cabling
between sensor and transmitter is being monitored. If the isolation is below
a user-defined level, this will be indicated in ConSoft and with a diagnostic
HART
®
message, and the output signal can be forced upscale or downscale.
This feature requires an extra lead inside the thermocouple or RTD.
Customized linearization
For resistance and mV inputs, the 50-point customized linearization can
provide a correct process value, in a choice of engineering units, for a sensor
with non-linear input/output relation.
MA_OPTITEMP_TT_51_en_150828_4000754203_R03.book Page 42 Friday, August 28, 2015 10:54 AM
