Troubleshooting - Level Pro Sentinel Series Instruction Manual

Sentinel Series
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Tank Sump Liquid Level Monitoring
7.3

Troubleshooting

Nothing happens when the Start switch is pressed.
Remove all of the batteries. Wait 30 seconds to initialize the Sentinel memory and
then reinsert the batteries. If the green LED does not come on when the switch is
pressed, replace the batteries with new ones.
Unit cannot transmit to data center.
Verify that the RSSI is greater than 20.
Verify that there is GSM SMS (Short Message Service) on the side selected in the
carrier preference setting.
Check for interfering structures such as tanks, buildings, or large equipment.
Reposition the unit if possible.
Check that the antenna connection to the unit is tight.
Verify the Serial Number of the unit on the web site.
Use an external antenna.
The level reading is incorrect.
Normally, all of the sensor parameters are set up by your Levelpro account
representative when the tank is initially configured. On rare occasions, the
information may not be correctly entered. If you have verified the tank information
and the tank level is still incorrect, there may be several causes for the incorrect
reading. If it is a differential pressure sensor, verify the settings for the probe offset
and the SGU. Either one of these settings may cause the reading to be off. If this is a
4-20mA current loop sensor, verify the 4mA and 20mA settings. If either of these
settings is incorrect, then the level that is calculated from the sensor data will be
wrong.
Verify the tank height.
The level reading is correct but volume is off.
Verify the tank capacity. This should be the volume in the tank at the tank height. If
the tank has a slight cone top but a standard vertical strapping chart is used, then the
tank height should be only to the shoulder of the tank.
Verify that the correct strapping chart is used.
The unit has stopped calling.
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Telemetry