RGI 8403

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Description,  technical data, measuring principle

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Your specialists for non-contact measurements

As an international active and renowned manufacturer, supplier and service provider of measuring systems for the non-contact determination of various process parameters (e.g. density and humidity) mainly in bulk goods (e.g. coal, potassium salt) by means of different physical measuring principles, we have an extensive range of products.

The products have been designed and developed to be used in numerous applications.

Product specification

Microwave moisture measurement module

Description

RGI 8403  is a microwave moisture sensor based on the 2.4 GHz ISM band, consisting of 2 modules (receiver and transmitter unit) with integrated front-end electronics and HF antenna, which measures the moisture of almost electrically non-conductive bulk material .

This  is a microwave moisture sensor based on the 868MHz band, consisting of 2 modules (receiver and transmitter unit) with integrated front-end electronics and HF antenna, which was specially developed for the MOCON-LKW for moisture measurement of waste paper or straw.

In  both cases, the material must be positioned between these two individual modules (e.g. on a conveyor belt).



MOCON 21 
Controller for moisture measurement
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MOISTERM
PC-Software Service-/Diagnosetool
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Technical data

Power supply: 
● Standard: 18VDC ... 30VDC, nominal 24VDC
    (Overvoltage and reverse polarity protection)
● Optional: 110 - 230VAC, 50-60Hz, 15VA (for 2 modules)
● Power consumption (at 24VDC):
     - 70mA without heating
     - 240mA with heating (one 7406 module)

Interface:
● 14 pin connector
● RS485 (potential free for power supply)

Signal outputs:
● Frequency output
    - Pulse amplitude: 15V / 50 ohms
    - Pulse width: approx. 2µs
    - Frequency range: min. 15kHz, max. 40kHz
● Digital output (RSSI)
    - Range (10 cm between TX and RX, planar antennas):
       0% moisture (max. RSSI) = approx. 1000 units,
       100% moisture (min. RSSI) = approx. 400 units
       (logarithmic function)

RGI

HF specifications:
● HF output strength (TX): max. 1.3 mW resp. +1 dBm, programmable
● HF output frequency (TX): 2402 MHz, 2404 MHz, ..., 2430 MHz
(2.4 GHz ISM band, depending on the selected channel 1, 2, ..., 15, programmable)
● Stability: <+ - 0.2 MHz (incl. Aging, temperature drift 0 ° C - 50 ° C and normal tolerance)
● Receiver sensitivity (RX): max: +10 dBm…. min: - 90dBm
● Antennas (TX and RX): built-in planar antennas, dimensions 100 x 160 mm
● Adjacent channel suppression:> 90dB

HF regulations:
● CEPT ERC 70-03 Device Type: Class 1L, Short Range Device
● ETSI EN 300 440 test method and requirements
● EN 301 489 electromagnetic compatibility
● FCC Class B Electromagnetic Compatibility USA
● EN 61326-1: 1997 + A1 and 2004/108 / EG Electromagnetic Compatibility Europe

Analog input:
● Range: 0… 20mA
● Resolution: 10 bit
● Accuracy: + - 0.05mA

Other parameters:
● Bus addresses: 1 to 9, programmable
● Measurement time constant: 0.25 ... 8 sec., Programmable

Electrical security:
● CE conformity
● IEC 61010-1 conformity
● UL 3101 confirmation
● 73/23 / EEC

Mechanical parameters:
● Housing (including antenna): 78 x 120 x 200 mm, IP 65 protection
● Weight (one 7604 module):

Environmental conditions:
● Temperature range: 0°...+50° C (operation), -20°...+60° C (storage)
● Humidity: 0% to 90% rel.humidity, no condensation
● Temperature stabilization:
- HF module: at 55 ° C +/- 1 K.
- RSSI output fluctuation: typ. - 0.2 units / K

Technique

Each  of the modules can be set both as a transmitter (TX) and a receiver (RX).

Transmitter  7406 (TX) sends a constant pattern of pre-programmed RF power on a single fixed frequency channel, which begins about 10 seconds after the device is switched on after an installed RF module has initialized, while these parameters are stored in a non-volatile EPROM.

The  receiving unit 7406 (RX) receives the RF signal level at the pre-programmed frequency, which begins about 10 seconds after the device is switched on after an installed RF module has initialized, while these parameters are stored in a non-volatile EPROM. 

From now on, the 7406 device repeatedly generates the values ​​of the returned signal strength indicator (RSSI signal) of its HF part, where the RSSI signal is the logarithmic value of the received RF signal and the repetition interval (at least 0.25 seconds) and the receiver frequency are constant and pre-programmable and are customer-specific parameters, while these parameters are also stored in the non-volatile EPPROM.

Application ares

Microwave  based measuring systems such as RGI 8403 are mainly used for bulk goods with inconsistent moisture distribution (interior and surface) and a particle size over 3 mm, such as lumps of coal, corn seeds, wheat, soybeans and other seed products, large ore particles, stones, etc. for use.

Important note

The  microwave module RGI 8403 can only be used in combination with the above-mentioned RGI components!

That's what makes RGI products so special

User friendly

● simple, intuitive teaching
● retrofitting
● no contact with the material to be measured
● Measurement independent of:
- medium
- process conditions

Safety and quality

● Maintenance-free because there is no wear
● high operational reliability
● Long-term stable measurement
● Recalibration is not necessary
● Checks before delivery:
- Quality, climate and function

"Made in Germany"

● own development and production in Germany
● Use of high quality materials and components
● Use of proven technology
● Worldwide sales and on-site service by trained personnel

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from our experts in process measurement technology.

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