Sensors & Software LMX100 Quick Start Manual

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LMX Does Not Power Up or LMX Sensor Not Detected

If you have connected the cables to the LMX Sensor, Display Unit, and the battery, pressed the

Power button on the Display Unit and:

•

The Display Unit does not power up, or

•

The LMX Sensor is not detected, and you get the following messages:

1) Wait at least 1-minute and see if the Display Unit starts up. Sometimes the Power LED on the

Display Unit fails but the Display Unit is otherwise OK. If the application starts but the LED on

the Display Unit does not turn on, test the operation of the LED using the System Test >

Keypad test under Tools.

a) Check that the fuse, inside the battery case, has not blown. If so, replace the 10 Amp

fuse with one of the spare fuses inside the battery case.

b) Use a multimeter with fine tipped probes (1mm or 0.04 inches) to measure the battery

voltage at the connector on the outside of the battery case. Measure the voltage between

socket #1 (ground, using the black probe) and socket #4 (power, using the red probe). If

the voltage is less than 10.5 volts, there is a problem with the battery.

Table of Contents

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Page 1 LMX Does Not Power Up or LMX Sensor Not Detected If you have connected the cables to the LMX Sensor, Display Unit, and the battery, pressed the Power button on the Display Unit and: • The Display Unit does not power up, or •...
Page 2 3) Test the Battery Cable Insert the battery cable into the battery and test the battery cable. Use a multimeter to measure the battery voltage at the connector at the end of the battery cable. Measure the voltage between socket #1 (ground, using the black probe) and socket #4 (power, using the red probe).
Page 3 b) Check all 37 sockets at the LMX connector, ensuring that none are blocked with debris. If so, clean out the debris, reconnect the cable and try powering the system again. 5) Replace the Cable If you have a spare cable, replace the current cable. If the system does not power on or if the LMX Sensor is not detected with either cable, please contact your GPR supplier for further assistance.
Page 4 c) Check all 37 sockets at the end of the cable, ensuring that none are blocked with debris. If so, clean out the debris, reconnect the cable and try powering the Display Unit again. d) With the cable connected to the LMX Sensor and the battery connected to the system, check the power from the battery is reaching the Display Unit through the cable by using a multimeter to measure the voltage between socket #21 (ground, using the black probe) and sockets #1 or #2 (power, using the red probe) on the end of the cable.