Optris CTex Operating Manual

optris® CTex LT

Infrared sensor for application in hazardous areas

Operators Manual - Addendum

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Manufacturer’s declaration for the CTex measurement system

The CTex sensing head can be used as a passive element in hazardous areas. The operator has to
verify the classification of the optris CT sensing heads, according to EN 60079-0/ EN 60079-11
(category of simple electrical devices) on his own.
To verify that the CT sensing head is a simple electrical device according to EN 60079-11 item 5.7 we
hereby confirm the following technical data:

• Inductance (available for the sensor cable only):

Inductance of the loops min. 0.55 mH/ km; max 0.56 mH/ km
In relation to a cable length of 15 m:
Inductance of the loops min. 0.825 *10-3 mH; max 0.84 *10-3 mH

• Capacitance:

Capacitance of the sensor cable:
Capacitance lead/ lead min. 16.5 nF/ km; max. 17.9 nF/ km
Capacitance lead/ rest min. 101.0 nF/ km; max. 103.4 nF/ km
In relation to a cable length of 15 m:
Capacitance lead/ lead min. 0.2475 nF; max. 0.2685 nF
Capacitance lead/ rest min. 1.515 nF; max. 1.551 nF
Capacitance in the sensing head:
C1 = Ceramic SMD Capacitor 6.8 nF +/- 20 %
C2 = Ceramic SMD Capacitor 6.8 nF +/- 20 %

optris® CTex LT

For further information of the CTex sensing head in relation to the appropriate components

Technical Data

Connection diagram

Figure 1: Connection diagram

Specifications

contact our service department.

Optris GmbH

Ferdinand-Buisson-Str. 14 · D-13127 Berlin · Germany
Tel: [phone] · Fax: [phone]
E-mail: [e-mail] · Internet: www.optris.de

optris CT-exMAD-E2014-11-A