Afriso Variofox 24 level gauge with alarm with ultrasonic sensor

Ultrasonic meter SEV 390-2 and Variofox 24 display

With this package you can measure most types of media and get level and alarm.

The sensor can handle heights from 25-300cm, other heights can also be obtained.

The ultrasonic level measurement technique is based on the principle of measuring the time required for the ultrasonic pulses to cover the distance from the sensor to the level to be measured and back.
The echoes bounced back from the surface of the medium to be measured and reached the sensor surface after the time of flight of the ultrasonic pulse.
The time of flight of the reflected signal is measured and processed by the electronics and then converted into distance, level, volume or flow proportional data using
the customizable tank dimensions or the pre-programmed gutter/dam parameters.

The intelligent QUEST+ process adaptive signal processing system ensures that the electronics identify and validate the fluid flow signal, providing reliable level monitoring.

Variofox 24 display
Compact, ready-to-connect display and control unit in a robust wall-mounted housing. With integrated sensor supply and 4 relay outputs.
Together with a sensor (e.g. for pressure, temperature, level, etc.), VarioFox® forms an autonomous measurement and control system.
VarioFox® is universally applicable and freely configurable.

Advantages
■ Can be used as a compact, ready-to-connect filling or emptying control
■ Visual and audible alarms
■ 4 switching outputs
■ Data logging function via SD memory card or RS485 interface

Technical specifications
Display
Multi-colour, backlit graphical display (50 x 30 mm),
Blue = Operation,
Red = Alarm,
Green = setup,
Display (5 digits),
User interface language selectable: English, German, French, Italian,
Start and end values as well as comma are scalable as required

Linearity
± 0.1 % v. Mw.

Resolution
10 Bit, Decimal point position can be set as required

Operating temperature range
Ambient: 0/50 °C
Storage: -20/+65 °C

Supply voltage
AC 50 – 253 V, 4.2 VA
DC 20 – 253 V, 2.7 W

Sensor supply
Integrated, galvanically isolated supply voltage for transducer: DC
17 V/20 mA

Analog input
All analog standard signals, e.g. 4-20 mA, 0-20 mA, 0-10 V
Audible alarm
Integrated piezo-buzzer, can be acknowledged

Analog output 1
0/4-20 mA, galvanically isolated

Analog output 2
0-10 V, galvanically isolated

Digital interface
Interfaces: RS 485
With Baud rate adjustment

Switching outputs
Relay contacts: 4 voltage-free changeover contacts
Relay contacts: Switching hysteresis adjustable
Contact rating: AC 250 V, 2 A, 250 VA
Contact rating: DC 250 V, 1 A, 100 W

Housing
Robust wall mounting
housing made of impact-resistant plastic
(PC)

W x H x D: 175 x 125 x 75 mm
Degree of protection: IP 65 (EN 60529)
Color: Grey (RAL 7035)
Electrical connection: 5 x cable gland M16 x 1.5

Linearization
Customer-specific linearization with a max. of 24 points for the indication of volume (e.g. liters) in non-linear tanks. Bearing charts
for cylindrical horizontal tanks and spherical tanks are pre-programmed.

Min./max. value memory
The highest and lowest values reached during operation can be
displayed.

Data memory
Long-term monitoring data is stored on a memory card (SD/MMC).
Memory card not included.