3.1 Description of
Humi
Core
™
PRO
Sensor
The
Humi
Core
Pro
sensor for capacitive moisture measurement as illustrated in Figure 2 is based on the
open capacitor principle. The bulk material in front of the measuring window serves as the dielectric of the
measuring capacitor. Data processing of the raw measured values with temperature compensation already
takes place in the moisture sensor. Data exchange with the
Humi
Core
Pro
transmitter takes place via the
RS-485 interface.
3.2 Description of
Humi
Core
™
PRO
Transmitter
The
Humi
Core
Pro
moisture measuring system consists of the sensor and transmitter unit. The trans-
mitter is housed in a DIN-rail enclosure as depicted in Figure 3. The inline measuring system for process
monitoring guarantees troublefree measurement of the internal product moisture of solids and emulsions.
The PC-aided user interface
Humi
Core
Configuration Program provides clear display of the measured,
alarm and MIN/MAX values, combined with easy editing and parameterization, enables uncomplicated and
simple operation.
Features
· 20-bit measured value acquisition and measured value process-
ing in the sensor
· Automatic temperature compensation according to stored table
· High degree of functional reliability combined with self-monitor-
ing function
· Low power input (≤ 350 mW)
· Digital transmission of measured values immune to interference
via RS-485 interface
· 3280’ (1000 m) maximum cable length between sensor and
transmitter
· Sturdy cylindrical stainless steel flange housing
· Little installation effort required for 4-core connecting line
· Easy, space-saving installation
The electronics installed behind the measuring window are encapsulated in a sturdy, hermetically sealed
plastic case. Mounted in a solid cylindrical stainless steel housing, the sensor is extensively insensitive to
external influences. Special internal casting protects the entire electronics against penetration of moisture
and increases resistance to caustic solutions, acids and solvents. The
Humi
Core
sensor is supplied from
the factory with pre-installed pig-tail cable and guarantees integrity to IP67 thanks to a high-quality PG
cable gland.
CAUTION: The measuring surface of the sensor is sensitive and must be protected against mechanical
impacts.
Figure 2
4
Specification
· PC-Control with
Humi
Core
Configuration Software
· PLS-Connection with MODBUS-RTU-Protocol
· 24 independent product settings
· Galvanic separated USB 2.0-Interface to the PC
· Galvanic separated RS-485 Interface to the PLS
· Galvanic separated analog output for moisture
· Galvanic separated MAX-Alarm-Output
· Galvanic separated digital input for external control
· Galvanic separated sensor-connection
Figure 3