Sudden and small axial movements should be detected within 40 milliseconds or less to minimise or avoid rotor-to-casing contact.

or avoid rotor-to-case contact. Redundant sensors and voting logic are recommended.

Thrust bearing temperature measurement is strongly recommended as a supplement to thrust position monitoring.

Shaft thrust monitoring consists of one to three displacement sensors mounted on the shaft end or thrust collar in the axial direction parallel to the shaft.

The displacement sensors are non-contact sensors that measure shaft position.

For critically important safety applications, the A6250 monitor provides triple redundant thrust protection.

The A6210 monitor can also be configured for differential expansion measurement.

During turbine start-up, both the casing and the rotor expand due to changes in thermal conditions.

Differential expansion therefore measures the relative difference between the displacement sensor mounted on the housing and the target of the sensor mounted on the shaft. If

housing and shaft grow at approximately the same rate, the differential expansion remains ideally close to zero.

Differential expansion measurement modes are supported in series/complementary or cone/slope modes.

Finally, the A6210 monitor can be configured in average rod drop mode to monitor riding belt wear in reciprocating compressors.

Over time, the rider band in a horizontal reciprocating compressor wears due to the force of gravity acting on the horizontally orientated piston in the compressor cylinder.

If the rider belt wears beyond the point where the piston would come into contact with the cylinder wall, damage to the machine and possible malfunction occurs.

By installing at least one displacement probe to measure the piston rod position, you will be notified when the piston drops – a sign of a worn rider band.

You can then set the shutdown protection threshold for automatic tripping.

The average piston rod drop parameter can be used as a coefficient to indicate actual riding belt wear.

Or, without applying any coefficients, the rod drop will indicate the actual movement of the piston rod.

The AMS 6500 is easily integrated with DeltaV and Ovation process automation systems.

Includes pre-configured DeltaV graphical Dynamos and Ovation graphical macros to speed graphical development for operators.

AMS software provides maintenance www.cniacs.com personnel with advanced predictive and performance diagnostic tools, enabling them to identify machine failures early with confidence and accuracy.

Features:

Dual-channel, 3U-sized, 1-slot plug-in module reduces cabinet space requirements by half over traditional four-channel 6U cards

API 670 and API 618 compliant hot-swappable modules

Pre- and post-buffered and proportional outputs, 0/4-20 mA outputs, 0 – 10 V outputs

Self-test features include monitoring hardware, power inputs, hardware temperature, simplification, and cable connections,

Hardware temperature, simplification and cable

Built-in software linearisation for easy post-installation adjustment of sensors

For use with displacement sensors 6422. 6423. 6424 and 6425 and driver CON xxx