Litronic FMS II Evaluation and transfer module
A self-sufficient system with almost unlimited possibilities. The Litronic FMS II type moisture measuring installation has been used for decades in a wide range of industries to measure the moisture content of various materials in real time.
At the beginning of each measurement section, the calibration per product must be carried out by means of reference procedures. The Litronic-FMS II software enables convenient and fast parameterisation.
The evaluation unit receives the raw values measured by the Liebherr sensors and immediately converts them into percentage humidity.
Thanks to the various interfaces, transfer to a higher-level control is possible.
Measurement by the Liebherr sensor system is based on the physical principle of capacitance determination in the high-frequency stray field. In addition to their high precision and robustness, the measuring devices from Bad Schussenried are characterised by their reproducibility.
Once the system has been calibrated, further measuring points can be set up or devices renewed on this basis at any time without great effort. The plant thus always remains reliable, regardless of its previous term and age.
| Measuring cycle of the evaluation | up to 100 measurements per second |
| Measured value output | optional: Profibus DP, analogue 0 (4) - 20 mA @ 500 Ohm |
| Measuring range | 0 -10 V DC ( 12 bit DAC ), (RS 232) measuring window can be parametrised as desired |
| Operating modes | Batch process, continuous process |
| Supply voltage | 24 V DC (-15 %/+20 %) |
- incl. parameterisation cable
Characteristics
- Parametrisation and calibration is done with standard PC (Litronic-FMS PC software)
- Fully automatic operation
- Manual or automatic operation
- Channel summary, coarse/fine switching
- Adjustable measuring range
- Fieldbus connection (Profibus DP optional)
- Modular design for easy expansion
- Assembly on standard TS35 mounting rail for simple switch cabinet mounting
- Indirect measuring method: Capacity determination in the high frequency stray field. This method uses the different dielectric constant (permittivity) of water and different materials (solids and liquids).
- Fully reproducible sensors: If the plant is subsequently extended with sensors or if sensors are replaced, no recalibration is necessary thanks to the built-in microprocessor.
- Multiple measuring points: Up to 16 sensors can be installed on one evaluation unit.
- Interfaces: Profibus, Ethernet or analogue measured value transfer by 0-10 V 12 bit or 0/4-20 mA 12 bit are available for signal transfer to the higher-level control. Digital output and input modules are available for limit signalling and start/stop commands and material curve switching.
- Modular: If required, the FMS II can be extended by further modules such as digital inputs, digital outputs, etc. A power pack for separate power supply is advantageous.
- Well stowed: The evaluation unit is mounted on a TS-35 top-hat rail and can thus be installed in the switch cabinet.
- Process control and regulation: Thanks to extensive interfaces, the moisture measurement can be integrated into process control systems and controls.
- Cost saving: Time-consuming and costly laboratory analyses are no longer necessary or can be reduced.
- Limit values: Maximum or minimum limits can be set using the software. Light or sound signals can be triggered if required.
- Mean value calculator: The sensor sends digital signals to the FMS evaluation and transfer module.
- Software: The Liebherr FMS II software is available for visualisation, configuration, measured value recording and calibration.
