MCM Electronics 5203 Reference Manual Download | Manualshive

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MAN100

Model LC-4.5

PART #5203

Reference Manual

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Summary of Contents for 5203

Page 1: ...1 MAN100 Model LC 4 5 PART 5203 Reference Manual ...

Page 2: ...t te en nt ti ia al ls s I IR R D Dr ro op ps s 0 01 1 m mV V r re es so ol lu ut ti io on n Interference Testing Cathodic Protection Tests Rectifier Trouble Shooting URD Cable Corrosion Tests Bridge Deck Corrosion Surveys Rebar Surface Potential Surveys Side Drain Measurements ...

Page 3: ... The Model LC 4 5 is specially designed for measuring potentials encountered in corrosion and cathodic protection testing These include structure to soil potentials structure to water potentials surface potentials surveys potential of rebars in concrete voltage gradients in soil or water structure potentials to anode potentials and output voltage of cathodic protection rectifiers and solar cell ar...

Page 4: ...accomplished by digging the electrode into the soil or by watering the soil at the point of the electrode contact Precaution It is essential that insulation on the test lead wire between the meter and the electrode be free of cracks or pinholes otherwise leakage errors may occur particularly in those locations where it is necessary to use the higher settings in order to obtain a reading Note Use o...

Page 5: ...increasingly important use for the push to hold button is for obtaining so called instant off readings of polarized potentials on a structure See Instant Off Potential Measurements INSTANT OFF DC POTENTIAL MEASURMENT The criterion for adequate cathodic protection involves the measurement of structure to soil potential immediately after cathodic protection is turned off This potential measurement i...

Page 6: ...k line voltage of AC power source to check AC output Voltage of rectifier transformers to check for hazardous induced voltages on structures near power lines and to measure structure to soil AC potentials which may have an effect on corrosion behavior of concentric copper neutrals of buried cable To measure AC voltage turn the range switch to 600V AC turn function switch to AC position then connec...

Page 7: ...uggests when to push the hold button to obtain the readings you desire Regardless of which of these methods you employ the digital meter has the advantage of requiring no interpretation of scales URD CABLE TESTS Underground Residential Distribution cable URD typically has bare copper concentric neutral wires There have been a large number of corrosion failures of these neutrals In most cases the a...

Page 8: ... at a convenient waist height Additional intermediate electrode extensions 16302 each30 long can be added to provide a greater distance between electrode and the meter The added length is desirable when measuring into manholes from the surface of the ground when measuring potentials in elevated water storage tanks when measuring potential around and under the hull of a ship or when measuring under...

Page 9: ...e reads differently when leads reversed o Circuit under test has voltage o Remove voltage supply from circuit No reading on 20mv range o Test lead on wrong terminal o Shift test lead from Volts Ohms to 20mV All readings are high o Operator neglected to heed Lo Bat display o Replace battery without delay Display changes very slowly o Meter too cold o Keep meter in warm place except when actually ta...

Page 10: ...rature 37 to 158 F 35 to 80 C Storage outside these temperatures limits may damage the display SERVICING Should any trouble be encountered with the LC 4 5 contact M C Miller Co for a RMA Return Material Authorization number and a note explaining the problem and a copy of a repair order if available If the meter is still within the one year warranty period and the trouble is the result of faulty ma...

Page 11: ...e of display no other digits A negative symbol will be displayed if a negative over range occurs Input Resistance 20mv range 1000 ohms All other DC ranges are switch selectable 10 25 50 100 200 mega ohms 600 VAC range 6 67 mega ohms minimum to 18 mega ohms maximum depending on input resistance switch position Operating Range 4 to 158 F 20 to 80 c Battery Qty 1 9V Alkaline recommended Battery Life ...

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