5
OPERATION
36
OPTITEMP TT 53 C/R
www.krohne.com
06/2018 - 4006523501 - MA OPTITEMP TT 53 R01 en
5.12 Factory default settings
The transmitters are delivered with a factory configuration Pt100 (
α
= 0.00385), 3-wire
connection 0...+100
°
C / +32...+212
°
F, Sensor error monitoring Upscale, Filtering level 1,2 s or
configured according to customer
’
s requirements.
Due to the long-term drift of max.
±
0.02% 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.
5.13 Sensor error monitoring
In case of a sensor break or short circuit the transmitter indicates this by either drop the output
<3.6 mA or lift it to >21.0 mA. The sensor error indication is individually configurable and is set
via the configuration software.
5.14 System or sensor error correction
System error correction
System error correction
System error correction
System error correction
To perform a System error correction a dry block cell or a temperature bath together with a
calibrated reference thermometer is needed. The system is the transmitter. Expose the
sensor to one (one-point correction) or two (two-point correction) accurately measured
temperatures (true temperatures), while the transmitter is connected to the configuration
software. The true temperature(s) are entered into the software, and the transmitter
automatically corrects for the system errors.
Sensor error correction
Sensor error correction
Sensor error correction
Sensor error correction
If the temperature sensor is calibrated, or the sensor error compared to the standard curve is
known, then the sensor error (deviation from the standard curve) can be entered into the
transmitter via the configuration software and the transmitter corrects for the sensor errors.
