KROHNE OPTITEMP TT 10 C-R EN - Manual (Page 37)

OPERATION
5
37
OPTITEMP TT 10 C/R
www.krohne.com 02/2013 - 4000752703 - MA OPTITEMP TT 10 C/R R03 en
5.7 Calibration
DANGER!
To avoid electric shocks and destructions or damages of the device, assure that all electrical
connections comply with the instructions within the chapter "Electrical connections".
INFORMATION!
The manufacturer recommends checking the calibration annually. To achieve the best possible
accuracy, note the following items:
• All calibration instruments (i.e. resistance decade and amperemeter) must have an accuracy
of at least 0.02%.
• Assure that the complete solder pad configuration has taken place before the calibration.
• The calibration has to take place according to the temperature scales ITS 90 (IEC 60751 for
Pt100, IEC 60584 for thermocouple type J, K, N and T and DIN 43710 for thermocouple type L).
The simulation source for RTD input on the transmitter must have a temperature coefficient
setting for platinum (= 0.00385). The simulation source for thermocouple input on the
transmitter must have the selected thermocouple type and used with correct thermocouple
wire that is connected with the correct polarity.
• If you set an input signal that delivers an outputs signal of 12 mA as described in the following
actionsequence, wait about 15 minutes and check the stability of the output signal
afterwards. Only if the output signal is stable then, the transmitter is ready for calibration.
Potentiometers of the in-head version
1 Potentiometer for zero point setting
2 Potentiometer for measuring span setting
.book Page 37 Tuesday, February 26, 2013 1:43 PM