KROHNE OPTITEMP TRA-TCA EN - Manual (Page 57)

TECHNICAL DATA
7
57
OPTITEMP TRA/TCA
www.krohne.com 08/2010 - 4000630501 - MA OPTITEMP TRA/TCA R01 en
7.8 Sensor response times
Thermometer response times are generally indicated as "50% time" (t
05
) and "90% time" (t
09
).
"50% time" refers to the time needed for a thermometer signal to achieve 50% of its end value in
the face of erratic temperature changes (this applies analogously to "90% time")
Pt100-RTD, water with 0.4 m/s (1.31 ft/s)
Thermocouple, water with 0.4 m/s (1.31 ft/s)
The following table contains information regarding the response times of the thermometer
without thermowell (TRA/TCA-P14):
Without thermowell (TRA/TCA-P14 with Ø 6 mm / 0.24")
INFORMATION!
You can find more information about response times in VDI 3522.
Ø of thermowell Straight thermowell Reduced tip Tapered tip
[mm] ["] t
05
(s) t
09
(s) t
05
(s) t
09
(s) t
05
(s) t
09
(s)
9 0.35 17 52 Not available Not available
11 0.43 21 58 8 22 Not available
12 0.47 22 66 10 26 12 30
Ø of thermowell Straight thermowell Reduced tip Tapered tip
[mm] ["] t
05
(s) t
09
(s) t
05
(s) t
09
(s) t
05
(s) t
09
(s)
9 0.35 14 42 Not available Not available
11 0.43 17 46 7 18 Not available
12 0.47 18 54 8 21 10 24
sensor Water with 0.4 m/s (1.31 ft/s) Air with 1 m/s (3.28 ft/s)
t
05
(s) t
09
(s) t
05
(s) t
09
(s)
Pt100 RTD 3.5 8 24 54
Thermocouple 2.5 7 21 50
.book Page 57 Tuesday, August 17, 2010 12:18 PM