Fuel/Air Ratio Control System VMS

Universal electronic fuel and air ratio control unit (VMS) for all types of combustion systems. TÜV-tested, licensed for TRD 604 installations. The VMS is the VR4 ratio controller's successor. It includes the electronic fuel and air ration control system with 4 or 5 servo outputs. The analogue inputs have 10-bit resolution. This permits actuator accuracy of < 0.1° with a 90° motor.
All operational and error messages are displayed in plain text. Up to 20 points can be input per curve. The unit's configuration can be changed on site through password-protected parameters. In the standard configuration, the unit has 2 curve sets (e.g. for oil and gas); 4 or 8 curve sets are available as options. The options of introducing corrections have been widely extended. This further improves the ability to implement special installations.

The unit has a PC interface. Curve and parameter data can be saved by means of a Windows based program. As a result, the VMS can be remote-controlled and the curves represented graphically. A demo version of this remote control and remote display software is available at download register.  

In addition, the VMS has a LAMTEC-SYSTEM-BUS interface for linking to other new-generation LAMTEC instruments, such as LT1 / LT2 Lambda transmitters for measuring the O₂ content of flue gas and for optimizing combustion.

The VMS can be connected to the control system via standard bus systems.

Other features:

• The last 10 faults are stored and can be called up at any time
• Integral, fuel-referenced operating hours and start-up counter
• Direct link to a Namur sensor for measuring revolution speeds in rev. speed control systems (optional)
• Optional integral output regulator with special functions, such as start-up and shutdown capabilities and weather control

All these innovations notwithstanding, the operating method has remained the same as in the VR.

Curve input is just as simple in the VMS as in its predecessor. A graphic representation of the most important options and functions is shown in selection criteria.

Read more in our sample system report: Zurich Airport with first CO regulation in Switzerland