CARLO GAVAZZI ATEX CB32 Série Guide D'installation page 2

This manual describes important points of caution for safe use of this product
in potentially explosive atmosphere. Please read this manual carefully before
installing and operating the product.
The CB32-serie is a capacitive level sensor for solid, fluid or granulated
substances and mainly for level control in silos or tanks. The sensor has a relay
output with adjustable time delay and sensitivity.
In general
The sensor should only be used within its design specifications. Incorrect use
may result in personal injury or damage to other equipment.
If the sensor shows signs of malfunction or leakage, stop the process
immediately and remove it for repair or replacement.
Label information:
II: The sensor is classified for explosion group II, which concerns all remaining
risk areas but mines
1: Category 1. The sensor can be used in zone:
20: Flammable material present continuously or long periods.
21: Flammable material present occasionally.
22: Flammable material present in abnormal conditions for short periods.
D: For use in hazardous areas, in which explosive dust are present.
Ex: Conforms to the Harmonized European Standards.
ta: Protection by enclosure, highest level.
IIIC: Conductive dust.
o
T85 C: The max. surface temperature of the sensor.
Da: EPL Da. See Category 1 D above.
The production lot number is printed on the cable or on a self-adhesive
sticker placed around the cable.
CB32 with no delay output:
The relay operates (connection between black and yellow wires) and remains
ON until the sensor is activated. After activation of the sensor, the relay re leas-
es and the LED goes ON.
CB32 with ON-delay output:
When the sensor is not activated, the relay operates (connection between
black and yellow wires) and the LED is OFF. When the sensor is activated, the
time measurement starts and the LED flashes. After expiration of the set time,
2
Introduction
Safety Instructions
II 1 D Ex ta IIIC T85ºC Da
Operating instructions