How To Interpret And Acknowledge Mci Alarms - SKF Machine Condition Indicator User Manual

To change from percentage alarm mode back to threshold alarm mode:
The procedure to re-activate threshold mode is similar to that for activating percentage
mode.
Read key action
1- Apply read key for
approximately 20
seconds
2 - Immediately
remove read key
3 - Immediately
reapply the read key

How to Interpret and Acknowledge MCI Alarms

Alarm Detection and Verification
During measurement collection, if the MCI detects an alarm condition, it automatically
verifies the alarm condition by retrying its measurements. This helps rule out transient
conditions and false alarms. When the MCI detects an alarm condition, it goes back to
sleep for an hour and then wakes up again to retry the measurements. It can repeat this
hourly alarm verification process for up to twelve hours (twelve retries) depending on the
"strength" of the alarm. For example, if the alarm level is exceeded by only a small
amount, the MCI may verify the condition for up to twelve hours (12 retries) before it
displays its red alarm LEDs. However, if the alarm level is exceeded by a large amount,
the MCI recognizes this and performs fewer attempts to verify the alarm condition before
it shows its red alarm LEDs. Thus, stronger alarms display the red alarm LEDs faster
than weaker alarms, and all alarms are verified.
SKF Machine Condition Indicator
User Manual
LED blink # blinks /
sequence seconds
change
Until LEDs Solid
change to solid
GREEN
LEDs change to 1 blink every
quick GREEN second
blinks
LEDs change to 1 blink every 5
very slow seconds
GREEN blinks
Lasts about
10 seconds
LEDs change to Solid
solid GREEN
Lasts about
10 seconds
 To save battery life, the MCI's vibration measurements must exceed a
minimum threshold level (.5 gE or 3 mm/s (.17 in/s P)) to validate that
the machine is running. If the measured vibration is below these levels,
the MCI does not proceed with the alarm validation process.
SKF Machine Condition Indicator
How to Interpret and Acknowledge MCI Alarms
Indicating Notes
Start of alarm During the 20 seconds, the
mode change MCI is progressing through its
activation / alarm status
procedure
You have 4 seconds to remove
read key
MCI is in You have 4 seconds to reapply
threshold read key
mode
1 blink every 5 seconds
indicates threshold alarm
mode is active
You may remove the read key
after slower blinks commence
Procedure is
complete
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