First take the full range of level - say for example - 0 to 4mtr.
Now install the ULT above the level on some structural base. Clean the fase of sensor with soft tissue paper.
Now before Power up the transmitter checked that the inclination from sensor face to water is minimum...90 vertical preffred & there should not be any dust remain on sensor face. now power up the transmitter -say 24vdc, check across terminal.
before starting program see the water level is static or having riple on the surf...
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Troubleshooting grounding problems can be difficult at best. It was not clear what you measured your voltage in reference to. In a floating DC system, if you read a voltage to ground, you have a ground in your circuit. If you do not, then your problem lies elsewhere (a problem with your system reference?). A cross connection to a different system can be a possible cause of this problem as can a bad power supply or a wiring mistake. Also, make sure that you do not have AC in your DC...
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A fundamental principle in instrumentation system troubleshooting is that every instrument has at least one input and at least one output, and that the output(s) should accurately correspond to the input(s). If an instrument’s output is not properly corresponding to its input according to the instrument’s design function, there must be something wrong with that instrument. Consider the inputs and outputs of several common instruments: transmitters, controllers...

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 When a motor overload or circuit breaker trips and /or blows fuses, certain procedures and tests should be carried out:

* lockout and tag out main circuit breaker;

* test insulation resistance of motor wires and windings by using megohm meter between T1, T2, & T3 leads and ground, then;

* test "T" leads to motor with ohmmeter for continuity and ohm-age of windings between A to B, B to C, A to C; each resistance should be within 1 or 2 ohms of each other; if the ohms readings are significantly d...
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* check to ensure main power is on( 110 VAC)

* check 24V dc power available

* identify problem area

* check sensor operation in problem area

* check sensor Inputs to PLC

* check on PLC that a change in sensor state causes the corresponding Input LED on the PLC to go on or off

* identify Output controlled by Input on PLC ladder diagram

* ensure that Output LED is cycling on/off with Input

* check that Output voltage is correct and cycling on/off with Input

* locate Output device and ensure that voltage...
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