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1-800-547-5740 • Fax: (503) 643-6322

www.ueitest.com • email: [email protected]

DMEG3/IRT3

Insulation Resistance Tester

INSTRUCTION MANUAL

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Summary of Contents for DMEG3/IRT3

Page 1: ...1 800 547 5740 Fax 503 643 6322 www ueitest com email info ueitest com DMEG3 IRT3 Insulation Resistance Tester INSTRUCTION MANUAL...

Page 2: ...ration Installing Test Leads 9 Detecting AC Voltage 10 Measuring AC Voltage 11 Measuring Continuity 12 Measuring Insulation Resistance 13 Temperature Correction 16 Preparing Equipment Under Test 18 To...

Page 3: ...the measured value on the DMEG3 or a high contrast analog display on the IRT3 AC Voltage measurement to 600 Volts Insulation resistance readings from 0 to 2000 Megohms with the DMEG3 or 200 Megohms w...

Page 4: ...ttempt to measure any voltage that exceeds the category based rating of this meter CAT III 600 Volts DO NOT attempt to use this meter if either the meter or the test leads have been damaged Return the...

Page 5: ...t contact with voltages above 60 volts DC or 25 volts AC as they may constitute a serious shock hazard Always turn off power to a circuit or assembly under test before cutting unsoldering or breaking...

Page 6: ...est leads If any of the following indications occur during testing turn off the power source to the circuit under test Arcing Extreme heat Flame Smell of burning materials Smoke Discoloration or melti...

Page 7: ...International Symbols 5...

Page 8: ...6 Controls and Indicators IRT3 DMEG3 1 2 3 4 4...

Page 9: ...Null Adjust DMEG3 Used to adjust meter to indicate 0 00 ohms with the function select switch in the continuity position the red and black leads clipped together and the Press to Test button pressed IR...

Page 10: ...t the ON OFF switch is turned on Orange indicates high voltage is being generated by the Megohmeter for insulation resistance testing CAUTION Live Circuit Indicator Indicates that live voltage is pres...

Page 11: ...tive Lo Bat will be displayed on the LCD 5 Properly installed and fully seated test leads Black test lead is inserted in the EARTH jack Red test lead is inserted in the LINE jack Replace the test lead...

Page 12: ...t lead to the grounded or neutral side of the circuit 3 Connect red test lead to the hot or powered side of the circuit 4 Observe Live Circuit lamp Lamp illuminated circuit is live DO NOT test continu...

Page 13: ...t under test 6 Press and hold or lock the Press to Test button 7 Observe voltage level 8 Release the Press to Test button remove power to the circuit under test and then disconnect test leads WARNING...

Page 14: ...4 Test continuity operation by shorting test leads together and pressing the Press to Test button 5 Connect black test lead to one side of the circuit i e winding or contact 6 Connect red test lead t...

Page 15: ...environmental conditions such as indoor use outdoor use chemical resistant high or low temperature maximum voltage or current ratings and many more When insulating materials are subjected to conditio...

Page 16: ...ol Insulation Resistance Testing Methods Insulation resistance testing can be performed using a variety of methods The proper method will be determined by the circuit or cable s rated voltage capacity...

Page 17: ...condensation may collect around the windings and connections Condensation can make a motor appear to be failing rapidly when it actually has years of serviceable life left Humidity also affects readin...

Page 18: ...grees Celsius or 68 degrees Fahrenheit will likely measure 75 Megohms at 30 degrees Celsius or 86 degrees Fahrenheit Accordingly you would record 150 Megohms on your PM record 75 Meg x 2 Use the follo...

Page 19: ...NOTE UEi makes a number of temperature products to use in reading motor temperatures Temperature Correction Table Fig 3 17 Conductor Temperature in F Multiply By...

Page 20: ...ng has no path to ground or other circuits Contactors and switches must be open and terminal connections must be removed prior to testing Your insulation resistance tester is designed to place the DC...

Page 21: ...quence Table Insulated 3 Conductor Cable Connection Sequence Table Shielded 3 Conductor Cable Connection Sequence Table Sequence L1 L2 L3 Shield 1 E L E E 2 L E E E 3 E E L E 4 Remove Shield E E E L f...

Page 22: ...n order to totally isolate the motor cables or equipment from other circuits Use the connection tables to determine where to make connections If you are testing a motor the brushes must be removed pri...

Page 23: ...alue 9 Apply temperature correction factor and record results on PM Chart Fig 4 This chart interprets some possible data PM Data Fig 3 21 Megohms Humidity Induced Dip Failed Motor Replaced Motor Repla...

Page 24: ...des you with the Polarization Index PI when you divide the reading observed at the longer term by that of the shorter The rule of thumb regarding this index 60 second reading divided by 30 second read...

Page 25: ...tary function select switch to the INSULATION position with the correct voltage selected Use the same voltage every time 6 Make connections according to the sequence tables provided or as your circums...

Page 26: ...RESISTANCE DATA LOG CARD EQUIPMENT MAKE SER NO LOCATION PLACED IN SERVICE COMMENTS DATE INFINITY INSULATION RESISTANCE MEGOHMS 1 2 3 4 5 6 8 1 2 3 4 5 6 8 10 20 30 40 50 60 80 100 200 300 400 500 600...

Page 27: ...DATE READING TEMPERATURE AMBIENT EQUIP PLOT ADJUSTED READING CORRECTION FACTOR ADJUSTED READING RELATIVE HUMIDITY...

Page 28: ...nt Do not allow water detergent or other liquids to puddle on the surface or flow inside the instrument In the event of accidental liquid intrusion return the instrument to UEi for service and evaluat...

Page 29: ...with your skin and has not damaged the instrument Dispose of batteries in accordance with your local solid waste disposal regulations Never expose batteries to high temperature or incineration Fuse Re...

Page 30: ...pecified replacement size and type 4 Replace battery compartment cover Specifications DMEG3 1 Insulation Resistance Measuring 0 200M 250V 500V DC 10 range Resolution 1 count 100k 0 2000 1000V DC 10 Re...

Page 31: ...min terminal voltage Short circuit 210mA DC min terminal voltage Power Max consumption current approximately consumption 160mA Buzzer sounds 10 on 20 range on Meet IEC 1010 safety requirements Catago...

Page 32: ...A terminal 0 100M 2 DCmA current 0 200M 2 DCmA Power Max consumption current approximately consumption 190mA Range 0 600V Accuracy 2 5 of full scale Line frequency 40 1k Hz range Ohm range 2 5 of full...

Page 33: ...4 Maximum Voltage 5 Dimension 6 Weight Meet IEC 1010 safety requirements Catagory III 6 7 x 6 5 x 3 6 inches 170 x 165 x 92 mm with housing front cover 2 1 lb batteries included 29...

Page 34: ...warranties including but not limited to implied warranties of merchantability and fitness for a particular purpose are limited to the express warranty UEi shall not be liable for loss of use of the in...

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