OPERATING INSTRUCTIONS EXTECH 403360 MEGOHMMETER
Contents
1. For open circuits or values of resistance over 2000MQ the meter will treat the resistance value as infinite and display a OL only When measuring values of resistance below 20MQ on the 2000MOQ range measurement error is great Releasing MEAS button then press range button one time to selected 20MQ range re depress the MEAS button PRECAUTIONS Hi and Lo terminals If one point of the circuit to be measured is connected to ground connect that part of the circuit to the Hi side measurement lead This is a safety measure In general howerver either terminal of the meter may be used for the ground side connection When the 1000V on LED is lighted 1000V is present between the Hi and Lo terminals Please use caution when handing the instrument in this condition The Low battery alarm The E3 icon may be displayed when measuring wey low values of resistance below 500KQ This due to the large power consumed when Seam such small resistances When subsequent resistance measurements of high values result in the 2 disappearing the meter batteries should be assumed to be normal Cleaning Periodically wipe the case with a damp cloth and deter gent do not use abrasives or solvents OC DIRECT CURRENT International Electrical Symbols Depress the MEAS button to turn on 1000VDC red LED lighted to measure insulation resistance Releasing MEAS button to turn off 1000VDC and automatically hold the display reading the me2. INTRODUCTION This instrument is a portable easy to use 31 2 digit compact sized digital megohmmeter designed for simplicity one hand operation Provides 1000V to test insulation Meter with Backlit LCD display Auto hold function and auto power off 15 seconds approx feature after releasing MEAS button to extend battery life with external power supplty input jack DC 6V SAFETY INFORMATION It is recommended that you read the safety and operation instructions before using the megohmmeter WARNING Remove power from circuit under test WARNING To avoid electrical shock remove test leads before OPERATING INSTRUCTIONS EXTECH 403360 MEGOHMMETER Megonm Probe Me ler 2009 te 10w wa opening case or battery cover Do not operate with battery cover open The Z symbol on the instrument indicates that the operator must refer to an explanation in this manual OPERATION Check of internal battery remove test leads 1 Depress the MEAS button 2 The 1000V on LED lamp should light indicating normal operation from the internal batteries 3 Ifthe 1000V on LED fails to light the batteries are completely worn or batteries are not installed in the meter Since either of those conditions are possible remove the battery cover and insert four type AAA Bs Sey se cells 4 Ifthe 1000V on LED lights weakly but the 3 LCD i 2 e display lights the batteries are near at the end of their Bee oe li
3. fe and should be replaced immediately with new batteries a 5 Release the MEAS button 6 To remove the battery cover remove the centrally o a 6 located case mounting screw and replace batteries Push buttons Back Light Button Release MEAS button then press the 3 button to toggle between turn on and turn off the Back Light When releasing MEAS button Back Light will turn off automatically after 15 seconds to extend battery life Range Select Button Release the MEAS button then press 20MQ 2000MQrange select button to toggle between 20MQ and 2000MO ranges MEAS MEASURE Button DOUBLE INSULATION Protection Classi Insulation Resistance Measurements 1 2 Remove test tip and test lead from Hi LO terminals terminals open Depress MEAS button to turn on the 1000V on LED lamp check the display resistance range is 20MQ range or 2000MQ range If resistance is 20MQ range release the MEAS button then press range button one time to selected 2000MQ range Connect the test tip to the Hi terminal and the clip lead to the Lo terminal of the meter Connect the clip to one end of the circuit to be measured and the test tip to the other end Depress the MEAS button The 1000V pilot LED lamp will light and the resistance value will be displayed in the meter When display reading stable releasing MEAS button the meter will automatically hold the display reading then turns off automatically after 15 seconds
4. ter turns off automatically after 15 seconds SPECIFICATIONS GENERAL Display 3 Li digit liquid crystal display LCD with maximum reading of 1999 Overrange OL or OL is displayed Low battery indication the 3 is displayed when the battery voltage drops below the operating level Measurement rate 2 5 times per second nominal Operating Environment 0 C to 40 C at lt 70 relative humidity Storage Temperature 20 C to 60 C 0 to 80 R H with battery removed from meter For Indoor use only Altitude UP to 2000m Safety According to EN61010 1 protection class II over voltage category CAT II 600V pollution degree 2 Auto power off 15 seconds approx Standby consume current lt 1uA External power 6VDC IA Battery 4 pcs 1 5V AAA size UM 4 R03 Battery Life 4 hours continuity typical with alkaline battery 20MOQ range test 10MOQ resistor Dimensions 170mm H x 44mm W x 4Omm D Weight 160g including batteries ELECTRICAL Range 20MQ to 2000MQ Resolution 10KQ on 20M0 range 1MQ on 2000MQ range Accuracy 20MO range 2 rdg 2dgts 2000MO to 500MQ 4 rdg 2dgts gt 500MO 5 rdg 2dgts Accuracy Temperature 23 C 5 C less than 70 RH Temperature Coefficient 0 1X specified accuracy C lt 18 C or gt 28 C Insulation Resistance Measurement Terminal Voltage Insulation Resistance Measurement Terminal Voltage
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