KROHNE OPTITEMP TT 30 C-R EN - Manual (Page 36)

7
TECHNICAL DATA
36
OPTITEMP TT 30 C/R
www.krohne.com 11/2012 - 4000753302 - MA OPTITEMP TT 30 C/R R02 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 (Download Center).
Measuring system
Application range Temperature, resistance or voltage measurements of solids, liquids and gases in an
industrial environment.
Design
Versions Versions Versions Versions
TT 30 C In-head transmitter which is optionally available in an intrinsically safe version for
installation in potentially explosive areas of zone 0, 1 and 2.
TT 30 R Rail-mount transmitter which is optionally available in an intrinsically safe version
for connection to sensors installed in potentially explosive areas of zone 0, 1 and 2.
Special features Special features Special features Special features
Sensor error correction This function automatically corrects know sensor errors; the precondition is that
you have entered these known sensor errors (e.g. the deviation of a calibrated
sensor from the standard curve).
System error correction This function corrects the system error (sensor error + transmitter error); the
precondition is that the sensor has been exposed to one (one-point correction) or
two (two-point correction) accurately measured temperatures ("true
temperatures"); after you have entered these true temperature(s), the transmitter
automatically corrects these errors afterwards.
Sensor isolation monitoring /
SmartSense (only for TT 30 C)
This function continously monitors the isolation resistance of thermocouples and 3-
wire connected RTDs as well as the cabling between sensor and transmitter; if the
isolation is too low, the transmitter forces the output to a user-defined level; note
that SmartSense requires an extra lead inside the thermocouple or RTD.
User-definable output: ≤ 3.6 mA, ≥ 21 mA or customized
Customized linearization A customized linearization with 9 linearization points is available for the
transmitter. It can be used to create almost any type of linearization curve for RTD,
T/C, resistance and mV inputs (the curve must be monotonic increasing).
Sensor break monitoring This function monitors sensor break and forces the output signal to a user-defined
level if any sensor lead is broken or disconnected, for RTD input it will also detect
sensor short circuit.
The monitoring is furnished with a pulsed excitation current which eliminates the
voltage drop on the lead wires, the sensor break monitoring can be switched off.
User-definable output: ≤ 3.6 mA, ≥ 21 mA or customized
Controlled output for instrument
calibration
You can set the transmitter to automatically provide a recurring output current
regardless of the input signal; the total time for the controlled output is adjustable
up to 30 minutes.
Dampening This function dampens undesired instabilities on the input signal; the dampening
time is the time required for the output to reach 90% of its final value after a step
change has been applied to the input (in addition to the update time); it is
ca. 2 seconds.
Loop check-up The transmitter works as an accurate current generator.
.book Page 36 Friday, November 9, 2012 3:50 PM