Listed below are a few commonly experienced problems and remedial action. These topics are also covered in the Troubleshooting GeoNet Networks and Agent Software Tutorial, and the GeoNet Troubleshooting Guide, both of which are available at geokon’s website, https://www.geokon.com. Contact geokon if additional assistance is needed.
Symptom: Unit will not respond to communications
□Wrong connection type, or incorrect address specified in Agent software.
□The batteries may be improperly installed. Check their placement.
□The batteries inside the supervisor may be dead. Replace the batteries.
Symptom: Data Present (e.g., Battery/Signal Strength) but No VW Sensor Data Available
□Verify that the gauge leads are wired correctly inside the node. Refer to the sensor manual for wiring information.
□Check the sensor for proper operation with an independent readout, such as a GK-404 or GK-405. Sensor operation can also be checked by using an ohmmeter to measure the resistance between the VW gauge leads. Very high (megohms) or infinite resistance may indicate cable damage, very low resistance (<20Ω) may indicate a short between conductors.
□For long cables, cable resistance can be added at approximately 14.7Ω per 1000 ft (48.5Ω per km) at 20 °C. Multiply this factor by two to account for both directions.
Symptom: Vw gauge reading is unstable
□Move any sources of electrical noise away from the transducer cable, such as generators, motors, arc welding equipment, high voltage lines, etc.
Symptom: Thermistor display shows -273.15 degrees C°
□This indicates an open circuit to thermistor leads. Verify that the thermistor leads are properly connected inside the node. Refer to the sensor manual for wiring information.
□Check the thermistor for proper operation by using an ohmmeter to measure the resistance between the thermistor leads. Resistance should be between 10KΩ and 2.4KΩ when the ambient temperature is between 0 and +30 °C. Appendix D details the resistance versus temperature relationship. Very high or infinite resistance may indicate cable damage, very low resistance may indicate a short between conductors
Symptom: Node has weak communication
□If the signal is consistently weak (indicated by red and green LEDs illuminated at the same time) but not intermittently red, proceed with the installation. If the signal is frequently lost (red flash) it will be necessary to improve it. Try to get the node as high as possible, with plenty of clear space around the antenna. Extending the sensor cable may enable moving the node to a better location. If the signal does not improve, a higher gain directional antenna may be necessary. Contact geokon for assistance.
Symptom: Node does not have power
□Ensure that the polarity of the batteries matches the diagram on the battery holder.
Symptom: Node will not synchronize with network
□If the red status light on a node is flashing at 10 second intervals, it means the node was once connected to a network, but the network is not present now, or the supervisor has been reset, resulting in an equal but not overlapping radio cycle.
□Ensure that the network is functioning in deployment mode (red light flashing every 10 seconds on the supervisor), and that the channel setting is correct. Follow the steps in Section 5.3 to remove and reinsert the batteries in the node.
Symptom: No Data From Node
□Be sure node is powered.
□With network in deploy mode, observe either red and green lights only, or green lights every 10 seconds, on the node.
□Make sure network time is set.
Symptom: Green Light flashes slowly (once per second)
Bootloader is activated, complete the following:
1.Change channel switches to a valid setting
2.Press the Reset button on the circuit board.
Symptom: Green and Red Light Alternating
□Device malfunction, contact geokon.