What does the ACK button on M88200 module do?
IRD8800 module M88200 is meant for Casing Vibration. It has the facility to set Alarm and Trip set points via the Keypad and the Relays can be set to Latching Enabled. This way when a relay gets energised after crossing the Threshold - it will latch on to its activated setting even after the level drops below threshold. The operator will have to manually acknowledge the relay to remove the latching and restore relay to deactivated condition. The ACK button on Keypad is provided for this very purpose - to acknowledge a Latched relay.
Long pressing the ACK button acknowledges the relay and removes the latch (please note that relay will latch again if threshold crosses again - this will happen till latching is enabled in menu)
How is Latching Useful? Say the operator is at home and a dangerous vibration exceeding Alarm level comes and triggers the Alarm relay. If latching is disabled and the dangerous vibration passes away before the operator rejoins work - then the relay will also deactivate and the operator will never come to know that an alarming vibration had occured while he/she was away. But, if relay latching was enabled - the operator would have found the LED corresponding to the Relay glowing even after dangerous vibration went away and the operator would become aware of where the dangerous vibration occured (which machine on which bearing and which direction) and would have been able to take corrective or preventive actions to safeguard the monitored machine. Once safeguarding complete - the operator would be able to acknowledge the relay and proceed with normal monitoring and protection of the machine.
Related Articles
What does the NEXT button on Module M88200 (Casing Vibration) do in IRD8800 Series?
This video showcases the different screens that are available on pressing NEXT button on IRD8800 Series Module M88200 (Casing Vibration Module) By default M88200 shows the Instantaneous Vibration Levels. On long press of Next button on Keypad - it ...IRD8800 Module M88300 Menu Structure
Attached to this article is the menu structure of Module M88300 of IRD8800 SeriesSensitivity Options in IRD8800 Module M88250
IRD8800 Series is an API 670 Compliant Machinery Protection System (MPS). It's module M88250 is used for Casing Vibration Monitoring and Protection paired with IRD544M Sensor. IRD544M sensors are designed for Nominal Sensitivity 42.52 mV/mm/sec +/- ...Data Sheet of M88950 Temperature Monitoring Module
IRD8800 series module M88950 is a Four Channel Temperature Monitoring and Protection System. It accepts Input from 4 Numbers of RTD or IRD515 PT100 Sensor. It provides live value and bargraph for Temperature and provides 4-20 mA output, MODBUS Output ...Sensitivity options in IRD8800 Module M88210
The Relative Shaft Vibration Module M88210 of IRD8800 Series allows different Sensitivity options to accommodate different Eddy Current Probes of different manufacturers keeping different Sensitivities. The option to minutely adjust sensitivity also ...