Rosemount 2120 - Page 24

August 2012
24
Quick Start Guide
9. The probe fork is subjected to small vibration stresses as part of its normal
function. As this provides a partition wall, it is recommended that the fork should
be inspected every 2 years for signs of defects.
10. Technical data:
a. Coding:
ATE X:
II 1/2 G D
Ex d IIC T6...T2 Ga/Gb
Ex tb IIIC T85°C...T 265°C Db
IECEx:
Ex d IIC T6...T2 Ga/Gb
Ex tb IIIC T85°C...T 265°C Db
b. Temperature:
2120*****E1X**, 2120*****E1S**
2120*****E7X**, 2120*****E7S**:
Minimum ambient air temperature (Ta) = –40°C
Minimum process temperature (Tp) = –40°C
c. Pressure: Must not exceed the rating of the coupling/flange fitted.
d. For electrical details and pressure ratings, see the 2120 Product Data Sheet
00813-0100-4030 or Reference Manual 00809-0100-4030.
e. Year of manufacture: marked on the product label
11. Cable selection.
a. It is the responsibility of the user to ensure that suitably temperature rated cable
is used. The table below is a guide to selection:
12. Special conditions of use
a. The user is to ensure the ambient air temperature (Ta) and the process
temperature (Tp) are within the range detailed above for the T class of the
specific flammable gases or vapors present.
b. The user is to ensure the ambient air temperature (Ta) and the process
temperature (Tp) are within the range detailed above for the maximum surface
temperature of the specific flammable dusts present.
Temperature
Classes
Maximum Surface
Temperature (T)
Maximum
Ambient Air
Temperature (Ta)
Maximum Process
Temperature (Tp)
T6, T5, T4, T3, T2, T1
T85 °C 75 °C 75 °C
T5, T4, T3, T2, T1
T100 °C 70 °C 90 °C
T4, T3, T2, T1
T135 °C 65 °C 125 °C
T3, T2, T1
T160 °C 50 °C 150 °C
T Class Cable Temperature Rating
T6 Above 85 °C
T5 Above 100 °C
T4 Above 135 °C
T3 Above 160 °C