KROHNE OPTITEMP TCA Ex EN - Manual (Page 7)

DEVICE DESCRIPTION
2
7
OPTITEMP TRA/TCA
www.krohne.com 10/2010 - 4001087001 - Ex AD OPTITEMP TRA/TCA R02 en
2.3 Marking
2.4 Flammable products
Atmospheric conditions
An explosive atmosphere is a mixture of air and flammable gases, vapours, mists or dusts under
atmospheric conditions. It is defined by the following values:
T
atm
= -20...+60°C / -4...+140°F and P
atm
= 0.8...1.1 bar / 11.6...15.9 psi
Outside of this range, no key data are available as to ignition behaviour for most mixtures.
Operating conditions
Outside of atmospheric conditions you cannot apply explosion protection according to Directive
94/9/EC (ATEX) – regardless of the zone assignment - due to the lack of key safety data.
1 Type designation
2 Sensor designation
3 Number of the EC Type Test Certificate
4 Ex-marking for gas and dust
5 Electrical sensor values (this information is different if a transmitter is used as the transmitter values then apply)
6 Equipment group and category for gas and dust
7 Identification number of the notified body as per Directive 94/95, Appendix IV
8 VGC key
9 Unique serial number
DANGER!
The operator is responsible for ensuring that the industrial thermometers are operated safely
as regards the temperature and pressure of the products used. Include the thermometer
assembly in the periodic pressure tests of the system when operating with flammable products.
.book Page 7 Friday, November 19, 2010 2:23 PM