KROHNE PTITEMP TT 20 C EN - Manual (Page 18)

5
OPERATION
18
OPTITEMP TT 20
www.krohne.com 10/2011 - 4000753102 - MA OPTITEMP TT 20 R02 en
5.2 Factory calibration of transmitter
The transmitters are delivered with a factory configuration Pt100 (α = 0.00385), 3-wire
connection 0...+100 °C / +32...+212 °F or configured according to customer’s requirements.
Due to the long-term drift of max. ±0.1% of span per year, a re-calibration of the
transmitter is normally not needed. Should you for any reason require the re-calibration, the
transmitter must be returned to the factory.
5.3 Sensor Break Monotoring (Up/Down scale)
In case the sensor breakes the transmitter will indicate this by either drop the output <3.6 mA or
lift it to >21.0 mA. The diffrent indication is set in the transmitter via configurator.
5.4 Sensor Short Circuit (Down Scale)
In case the sensor short circuit the transmitter indicates this by dropping the output <3.6 mA and
is default.
5.5 Error Corrections
By setting the measured min and max value for the sensor in given temperature range the
transmitter can compensate sensor errors. This is set with help of the configurator.
Figure 5-1: Connection during configuration of in-head transmitter
a = PC configuration kit; b = PC software ConSoft
1 Input
2 R
Load
3 Output voltage supply (terminals 6 and 7)
4 Communication with USB interface and a PC software ConSoft
.book Page 18 Friday, October 14, 2011 11:22 AM