I currently have 28 Predictive Maintenance Sensors deployed. Of the 28 I have issues with 5. All of the sensors are installed the same way, keeping the sensor cables as far away from high voltage lines and motors as possible. The vibration sensor cables have been shielded with EMI shielding tape, copper foil tape, and copper-nickel mesh tape encased in shrink tubing and grounded to the antenna jacks. All of the sensors have been reset numerous times, a few of them factory reset and then reconfigured. Multiple locations have been tried for the vibration sensors.
For the sake of identity I’ll include my node ID’s:
Node 4 - Getting all data except the thermocoupler temperature is way off, varying from 8 to 12 degrees Fahrenheit, almost 60 degrees below the ambient temperature of the plant.
Node 8 - Getting all data but the amps fluctuate wildly from 0 to 15. On a 5 minute cycle my last 10 amps readings were 2.34, 3.72, 2.95, 0, 4.13, 5.89, 0, 6.16, 4.94, 0. This obviously isn’t the case as it would immediately be evident in the operation of the machine. Results are the same when the vibration sensor is disconnected.
Node 11 - Completely stopped sending data after 19 days of operation. During those 19 days the sensor performed perfectly. Power level was set at 3 with brand new batteries when installed.
Node 20 - All data except amps.
Node 27 - No vibration or vibration temp data, amps data and thermocoupler temp is good.
Any help or advice would be greatly appreciated, my deadline is the end of this week.