CARLO GAVAZZI CB32-ATEX Capacitive Level Sensor Instruction Manual
- June 12, 2024
- CARLO GAVAZZI
Table of Contents
CARLO GAVAZZI CB32-ATEX Capacitive Level Sensor
Product Information
The CB32-series is a capacitive level sensor designed for solid, fluid, or granulated substances, mainly used for level control in silos or tanks. The sensor has a relay output with adjustable time delay and sensitivity. It is classified for explosion group II and can be used in hazardous areas where explosive dust is present. The sensor conforms to the Harmonized European Standards and is protected by enclosure, the highest level.
Safety Instructions
- Read the manual carefully before installing and operating the product.
- The sensor should only be used within its design specifications.
- If the sensor shows signs of malfunction or leakage, stop the process immediately and remove it for repair or replacement.
- Establish an effective ground connection between the sensor housing and the installation equipment in which the sensor is mounted.
- If a longer cable is required, an equipotential bonding of the cable longer than 2000mm (standard for the CB32 series) has to be made, e.g. by drawing the cable in a grounded metal pipe.
Operating Instructions
CB32 with no delay output: The relay operates (the connection between
black and yellow wires) and remains ON until the sensor is activated. After
activation of the sensor, the relay releases and the LED goes ON.
CB32 with ON-delay output: When the sensor is not activated, the relay
operates (the 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 the expiration of the set time, the relay releases and the LED
goes ON. The relay remains released until the sensor is deactivated.
CB32 with OFF-delay output: The time
measurement starts and the LED flashes when the power supply is applied to the
sensor. When the set time has expired, the relay operates (the connection
between black and yellow wires) and the LED goes OFF. When the sensor is
activated, the relay releases and the LED goes ON. As soon as the sensor is
deactivated, the measurement of the set time starts.
Mounting Instructions
The CB32 sensor family has to be non-flush mounted (approx. 10 mm). Keep the grey front of the sensor free. Establish an effective ground connection between the sensor housing and the installation equipment in which the sensor is mounted. Refer to the installation diagram for hazardous and non-hazardous locations.
Installation Diagram
Hazardous location: BN BU WH YE BK
Non-hazardous location: + Power supply – Relay output
Introduction
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.
Safety Instructions
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: EX II 1 D Ex ta IIIC T85ºC Da
- 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.
- T85oC: 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.
Operating instructions
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 releases 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, the relay releases and the LED goes ON. The
relay remains released until the sensor is deactivated.
CB32 with OFF-delay output:
The time measurement starts and the LED flashes when power supply is applied
to the sensor. When the set time has expired, the relay operates (connection
between black and yellow wires) and the LED goes OFF. When the sensor is
activated, the relay releases and the LED goes ON. As soon as the sensor is
deactivated, the measurement of the set time starts.
Mounting Instructions
The CB32 sensor family has to be non-flush mounted (approx. 10 mm). Keep the
grey front of the sensor free.
Installation
Installation Diagram
- NB: The relay will be activated when the sensor is not activated. Establish an effective ground connection between the sensor housing and the installation equipment in which the sensor is mounted. If a longer cable is required, an equipotential bonding of the cable longer than 2000mm (standard for the CB32 series) has to be made, e.g. by drawing the cable in a grounded metal pipe.
Maintenance/service
Warning: Make sure only qualified personnel performs the installation/
maintenance/service
Before removing the sensor, or before connecting or disconnecting the wiring,
turn off the power supply. Do not disconnect unless the area is non-explosive.
Verify that the environmental temperature is within the temperature class
required for the area.
Technical data
ATEX approved sensors
- CB32CLN20QUAX 24V AC/DC, ON-delay
- CB32CLN20SUAX 120V AC, ON-delay
- CB32CLN20RUAX 230V AC, ON-delay
- CB32CLN20QVAX 24V AC/DC, OFF-delay
- CB32CLN20SVAX 120V AC, OFF-delay
- CB32CLN20RVAX 230V AC, OFF-delay
- CB32CLN20QTAX 24V AC/DC
- CB32CLN20STAX 120V AC
- CB32CLN20RTAX 230V AC
Electrical specification Supply Voltage
24VAC/DC| 20-28VAC/DC, 0-63Hz|
---|---|---
115VAC| 100-135VAC, 57-63Hz
230VAC| 195-255VAC, 47-53Hz
Operating temperature| -20oC – +40oC
Relay output| SPDT
@24VAC/DC| DC1: 5 ADCAVG
@115VAC| AC1: 5 AACrms
@230VAC| AC15: 2 AACrms
Degree of protection| IP67
Max time-delay| 10 min
ISO 9001 / ISO 14001: www.mscertification.net.
- Certified in accordance with ISO 9001
- www.gavazziautomation.com.
MAN CB32 ATEX MUL rev.19-03.2022
References
Read User Manual Online (PDF format)
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