6505 User Manual
Contents
1. For measurements on circuits not directly connected to the AC supply wall outlet such as protected secondaries signal level and limited energy circuits For measurements performed on circuits directly connected to the electrical distribution system Examples are measurements on household appliances or portable tools For measurements performed in the building installation at the distribution level such as on hardwired equipment in fixed installation and circuit breakers For measurements performed at the primary electrical supply lt 1000V such as on primary overcurrent protection devices ripple control units or meters Receiving Your Shipment Upon receiving your shipment make sure that the contents are consistent with the packing list Notify your distributor of any missing items If the equipment appears to be damaged file a claim immediately with the carrier and notify your distributor at once giving a detailed description of any damage Save the damaged packing container to substantiate your claim Megohmmeter Model 6505 5 1 4 Ordering Information Megohmmeter Model 6505 Cat 2130 18 Includes small classic tool bag set of 3 color coded 6 ft leads 5000V red blue black set of 3 color coded alligator clips 600V CAT IV red blue black one blue jumper lead for use with guard terminal fuse 0 1A 380V rechargeable battery pack installed US 115V power cord and user ma2. I S T Includes calibration certificate plus recorded calibration data Ship To Chauvin Arnoux Inc d b a AEMC Instruments 15 Faraday Drive Dover NH 03820 USA Phone 800 945 2362 Ext 360 603 749 6434 Ext 360 Fax 603 742 2346 or 603 749 6309 E mail repair aemc com Or contact your authorized distributor Costs for repair standard calibration and calibration traceable to N 1 S T are available NOTE You must obtain a CSA before returning any instrument Technical and Sales Assistance If you are experiencing any technical problems or require any assistance with the proper operation or application of your instrument please call mail fax or e mail our technical support team Chauvin Arnoux Inc d b a AEMC Instruments 200 Foxborough Boulevard Foxborough MA 02035 USA Phone 800 343 1391 508 698 2115 Fax 508 698 2118 E mail techsupport aemc com WWW aemc com NOTE Do not ship instruments to our Foxborough MA address 26 Megohmmeter Model 6505 Limited Warranty The Megohmmeter Model 6505 is warranted to the owner for a period of one year from the date of original purchase against defects in manufacture This limited warranty is given by AEMC Instruments not by the distributor from whom it was purchased This warranty is void if the unit has been tampered with abused or if the defect is related to service not performed by AEMC Instruments For full and detailed warranty coverage
3. long duration The quality of the insulation is a function of the results found DAR PI Condition of the Insulation 1 lt 1 25 gt Inadequate or even dangerous lt 1 6 lt 4 Good gt 1 6 gt 4 Excellent 4 5 1 Adjustmentsofthe PI It is possible to modify the PI times to meet specific needs Reminder PI 10 min R 1 min The first PI time is 1 min It can be set to values from 30 sec to 30 min in 30 sec steps Press and hold the DISPLAY button and turn the rotary switch to the SET VvAR position Hold the DISPLAY button until PI_1 appears in the display You can change the first PI time PI_1 using the and Y buttons e To save changes simply turn the switch The second PI time PI_2 is 10 min It can be set to values from PI_1 up to 59 min in 1 min steps Press and hold the DISPLAY button and turn the rotary switch to the SET VLOCK position You can modify the second PI time using the and Y buttons To save changes simply turn the switch Megohmmeter Model 6505 21 46 Adjustment of the Variable Test Voltage This function makes it possible to use test voltages other than the 4 preset values of 500 1000 2500 and 5000 Setthe switch to SET VvAR The test voltage flashes Change the test voltage using the A and V buttons Setthe switch to MO 50 5000V to make the measurement 50 5000V so so00w This value is retained in a
4. measurement Indicates the battery is low and must be recharged see 5 1 1 10 Megohmmeter Model 6505 CHAPTER 3 SPECIFICATIONS 3 1 Reference Conditions Influence Quantity Reference Values Temperature 23 3 Relative humidity 45 to 55 RH Supply voltage 9 to 12V Frequency range DC and 15 3 to 65Hz Capacity in parallel on resistor Our Electrical field nil Magnetic field lt 40 A m 3 2 Voltage Measurement Range 1 0 to 99 9V 100 to 999V 1000 to 2500V 2501 to 5100V Frequency Range DC and 15 to 500Hz DC Resolution 0 1V 1V 2N 2V A 1 of Reading 1 of Reading 3cts 5cts Input Impedance 750KQ at 3MQ depending on measure voltage Over 500Hz the small display indicates and the main display gives only an assessment of the peak value of the measured voltage 3 3 Insulation Resistance Method Voltage current method according to EN 61557 2 ed 02 97 Nominal Output Voltage 500 1000 2500 5000Vpc or adjustable from 40 to 5100V No Adjustment in Variable Mode 10V from 40 to 1000V 100V from 1000 to 5100V Nominal Current gt 1 Megohmmeter Model 6505 11 Short circuit Current lt 1 6mA 5 Load Current approx when starting measurement Max Acceptable Voltage Upeak 0 4Un Test Voltage 500V
5. restart the measurement Indicates that the protective fuse of the G terminal is defective Replace the fuse as indicated in 5 2 23 CHAPTER 5 MAINTENANCE Use only factory specified replacement parts AEMC will not be held responsible for any accident incident or malfunction following a repair done other than by its service center or by an approved repair center 5 1 Recharging the Battery If the symbol displays the battery needs to be recharged Connect the instrument to the 115VAc power cord via the connector charging starts automatically bAton the small display and chrG on the main display signifies fast charging in progress bAt on the small display and chrG flashing on the main display signifies slow charging bAton the small display and FULL on the main display signifies that charging is complete If the instrument is started up and the battery voltage is gt 8V then the normal use of the device is permitted NOTE The battery should only be changed by an authorized repair facility recognized by AEMC Instruments mie 24 Megohmmeter Model 6505 5 2 Fuse Replacement If FUSE G flashes on the display the fuse must be replaced taking all the necessary precautions when opening up the instrument sure that of the terminals connected that the selector switch is set to OFF The fuse is located on the left side of the facepla
6. 1000V 2500V 5000V 10 to 999kQ Range 1 000 to 3 999MO 4 00 to 39 99MQ 40 0 to 399 9MQ 0 400 to 3 999GQ Resolution 1kQ 10kQ 100kQ 1MQ Accuracy 5 of Reading 3cts Test 1000V 2500V 2500V Voltage 500V 1000V 2500V 5000V 5000V 5000V lanas 4 00 to 40 0 to 0 400 to 2 000 to 4 00 to 9 39 9960 399 960 1 99970 3 999TO 9 99TQ Resolution 10MQ 100MQ 160 1060 5 Reading 3cts 15 of Reading 10cts Accuracy in variable mode R measured Un 250pA Test voltage 40 to 160V 170 to 510V 520 to 1500V 1600 to 5100V R measured min 10kQ 10kQ 10kQ 10kQ B maas red max 160 0GQ to 640 0GQ to 2 080TO to 6 400TO to 640 060 2 040TQ 6 000TO 10 00TO To obtain the accuracy in variable voltage mode calculate from the accuracies of the fixed voltages above Measurement of the test voltage after a capacitive insulation measurement Measurement Range 25 to 5000V Resolution 0 2 Un or 1ct Accuracy 5 of Reading 3cts 12 Megohmmeter Model 6505 Calculation of terms DAR and PI Specified Range 0 02 50 00 Resolution 0 01 Accuracy 5 of Reading 1ct Typical change curve for test voltages according to load Range 500V 600 500 400 300 200 100 Range 1000V 1200 1000 800 600 400 200 0 1 1 MO Megohmmeter Mo
7. 6505 E User Manual INSTRUMENTS TT X gt o T oru i odo Statement of Compliance Chauvin Arnoux Inc d b a AEMC Instruments certifies that this instrument has been calibrated using standards and instruments traceable to international standards We guarantee that at the time of shipping your instrument has met its published specifications An NIST traceable certificate may be requested at the time of purchase or obtained by returning the instrument to our repair and calibration facility for a nominal charge The recommended calibration interval for this instrument is 12 months and begins on the date of receipt by the customer For recalibration please use our calibration services Refer to our repair and calibration section at www aemc com Serial Catalog 2130 18 Model 6505 Please fill in the appropriate date as indicated Date Received Date Calibration Due Chauvin Arnoux Inc B d b a AEMC Instruments INSTRUMENTS www aemc com Table of Gontents INTRODUCTION 4 eine 4 1 2 Definition of Measurement Categories 5 1 3 Receiving Your Shipment sss 5 1 4 Ordering Information ii 6 1 4 1 Accessories and Replacement Parts 6
8. Em in sec A et N XU Po OOO fco 5000 we z Lt Lt LUI HA nA pF MO 2500V 1 E 1000 6 MQ 500V DISPLAY Corr_ L START STOP sds DAR PIY MEGOHMMETER AEMC Y MODEL 6505 Figure 2 1 Item Description 1 Connection terminals G and and access to the protective fuse AC power plug direct operation on AC and battery recharge Back lit liquid crystal display see S 2 5 Serial interface male plug 9 pin for calibration only Rotary selector switch with 8 positions see S 2 3 START STOP button amp G N Two function buttons see 2 4 8 Megohmmeter Model 6505 23 Switch Functions Range Function OFF Instrument powered down 500V Insulation measurement at 500V up to 2TQ 1000V Insulation measurement at 1000V up to MQ 2500V Insulation measurement at 2500V up to 10TO 5000V Insulation measurement at 5000V up to 10TO MQ 50 5000V Insulation measurement with variable test voltage SET VVAR Sets the user definable test voltage for the variable 50 5000V position SET VLOCK Sets the user definable maximum test voltage output irrespective of the insulation measurement positions 2 4 Button Functions Button Function ON OFF This button is pressed to start then stop the measurement A long press starts th
9. Inc d b a AEMC Instruments 15 Faraday Drive Dover NH 03820 USA Phone 603 749 6434 Fax 603 742 2346 www aemc com
10. PRODUCT FEATURES 7 2 1 Description iat et er tbt ea Eel 7 2 2 Control Features Hi 8 2 9 Switch FUNCIONS sei e conecte aet ot gut iio 9 2 4 Button 8 9 2 9 Displays pope ee tiui 10 2 5 1 Digital Display 10 2 5 2 Bargraph 10 2 5 3 Display Symbols 10 SPECIFICATI0NS 11 3 1 Reference Conditions 11 3 27 Voltage mme tr tette 11 3 3 Insulation Resistance nennen 11 34 uc oio petet tendit ios 14 3 5 Power Supply 15 3 6 Environmental 15 3 7 Mechanical Specifications 16 3 8 Safety Specifications 16 3 9 Variations in Operating 16 OPERATION ini UU I Y III a s 17 41 Serial NUmDeR ene ote eta 17 4 2 Software Version ran nen 17 4 3 Voltage Measurement 17 4 4 Insulation Measurement 18 45 R nr een 20 4 5 1 Adjustments of the 21 4 6 Adjustmen
11. ce Weak Insulation Connect the red high voltage lead between earth and the terminal of the instrument Connect the black high voltage lead between one phase of the motor and the terminal of the instrument Strong Insulation For a very high insulation value connect the small blue high voltage lead between the rear earth pick up jack of the black lead and the G terminal of the instrument This serves to reduce any external influence and obtain a more stable measurement Cable Connect the red high voltage lead between the braid and the terminal of the instrument Exterior Insulation Insulation Connect the black high voltage lead between the core and the terminal of the instrument Connect the blue high voltage lead between the insulation and the G terminal of the instrument The guard serves to eliminate the effect of surface leakage currents 18 Megohmmeter Model 6505 Once the connections have been made choose the desired test voltage on the rotary switch When powered up the instrument displays the following Condition of the battery Test voltage Voltage present on the object to be tested Press the START STOP button to start the measurement During measurements the instrument will beep every 10 seconds to alert the user that a high voltage is present Press the START STOP button again to stop the measurement The instrument continues to measure external voltag
12. del 6505 13 Range 2500V 3000 2500 2000 1500 1000 500 0 1 1 10 MO Range 5000V 6000 5000 4000 3000 2000 1000 0 1 1 10 MO 3 4 Capacitance This measurement is made at the end of each insulation measurement while the circuit is being discharged Measurement Range 0 001 to 9 999 uF 10 00 to 49 99 pF Resolution 1 nF 10 nF Accuracy 10 of Reading 1ct 10 14 Megohmmeter Model 6505 35 Power Supply Rechargeable battery NiMh 8 x 1 2V 3 5Ah Line Voltage 85 to 256V 50 60Hz Minimum Battery Charge Life per NF EN 61557 2 Number of Measurements Test Voltage Nominal Charge 5s on nominal charge with 25s pause between each measurement 500V 500kQ 6500 1000V 1MQ 5500 2500V 2 5MO 4000 5000V 5MOQ 1500 Average Battery Life The operating time will be 15 days or 3 weeks based upon a 10 minute long PI measurement Recharge Time Charging must be done between 20 and 30 C 6 hours for 100 capacity 10 hours if the battery is completely drained 0 5 hours for 10 capacity charge life 2 days approximately A NOTE It is possible to recharge the batteries while performing insulation measurements provided that the values measured are higher than 20M In this case the recharging time is higher than 6 h
13. e measurement of the DAR and of the PI Before during or after the measurement pressing this key displays the DISPLAY various measurement parameters This function is available only in the SET positions of the switch Increases the flashing parameter being displayed To move about the list of interval insulation measurements in the R t function This function is available only in the SET positions of the switch Decreases Y the flashing parameter being displayed To move about the list of interval insulation measurements in the R t function NOTE If the and W buttons are held down the movement between parameters is increased to a faster rate Megohmmeter Model 6505 25 Display 100 1G 10G PN BBBB O A TO CUI pr 2 5 1 Digital Display Main Display Indicates the value of Insulation measurement resistance DAR and PI or capacitance Small Display Indicates Voltage measured or applied by the instrument Elapsed time or the output voltage during insulation measurement 2 5 2 Bargraph Display Indicates Active during insulation measurement 0 1MQ to 1TQ Indicates the battery charge at start up 2 5 3 Display Symbols Dangerous voltage generated V gt 120V External voltage present symbol is activated after pressing START if V gt 25VAC 3V or gt 35VDC Indicates the duration of the measurement or the time remaining in the case of a PI
14. ents are included in the quantity MO 16 Megohmmeter Model 6505 CHAPTER 4 OPERATION Charge the instrument fully before use see S 5 1 me 4 1 Serial Number To view the serial number of the instrument keep the DISPLAY button pressed and turn the switch to the MQ 500V position 4 2 Software Version To view the internal software version of the instrument keep the DISPLAY button pressed and turn the switch to the MO 1000V position Technical documentation on Ground Resistance Testing is available on our website at www aemc com mie 4 3 Voltage Measurement As soon as the switch is set to an insulation measurement position the instrument automatically measures the presence of any AC DC voltage This voltage is measured at all times and indicated on the small display unit The instrument automatically determines AC or DC The AC measurement is an RMS value If an excessively high external voltage is present on the terminals gt 0 4 Un pressing the START STOP button has no effect and no measure ments are made Similarly if an excessively high erroneous voltage gt 0 4 Un is detected during the measurement the measurement is automati cally stopped Megohmmeter Model 6505 17 4 4 Insulation Measurement Depending on the measurements to be made there are three ways to connect the instrument In all cases disconnect the device to be tested from the sour
15. es but the test result remains displayed on the main display unit To ensure your safety the instrument will automatically discharge the circuit under test allow for the voltage displayed to fall back below 25V before disconnecting the leads Press the DISPLAY button to display Before the measurement voltage present on the device to be tested 2 presses e test voltage e surface leakage current During the measurement 2 presses test voltage instantaneous insulation resistance value duration of the measurement current flowing in the resistance being measured After the measurement voltage present on the device tested 5 presses e insulation resistance value just before the measurement was stopped duration of the measurement test voltage generated during the measurement current that flowed in the resistance measured surface leakage current capacitance Megohmmeter Model 6505 19 45 Measurement Setthe switch to one of the insulation measurement positions Start the measurement by a long press 225 on the START STOP button The long press is acknowledged by an audible beep MQ 1000V Mo 1000v The measurement starts the default duration of 10 min A countdown displays the time remaining The measurement stops automatically Press the DISPLAY button to display Before the measurement voltage present on the device to be tested 2 presses test vol
16. es delivered with the unit compliant with safety standards IEC 61010 2 031 Respect the value and type of the fuse see S 5 2 to avoid damag ing the instrument and voiding the warranty Set the switch to OFF when the instrument is not in use Repairs and metrological verifications must be carried out by approved qualified personnel Wear the appropriate protective gear insulated boots amp gloves 1 1 Symbols Signifies that the instrument is protected by double or reinforced insulation CAUTION Risk of Danger Indicates a WARNING and that the operator must refer to the user manual for instructions before operating the instrument in all cases where this symbol is marked Risk of electric shock The voltage at the parts marked with this symbol may be dangerous P RI 4 Megohmmeter Model 6505 Ground Earth Important instructions to read and understand completely Important information to acknowledge Battery Fuse dl DE USB socket Mm The marking guarantees conformity with European directives and with regulations covering EMC ES 1 2 CAT I CAT Il CAT II CAT IV 1 3 The trashcan with a line through it means that in the European Union the product must undergo selective disposal for the recycling of electric and electronic material in compliance with Directive WEEE 2002 96 EC Definition of Measurement Categories
17. non volatile memory 4 7 Adjustment of the Maximum Test Voltage The user can set a maximum generated voltage to prevent any accidental over voltage tests being conducted in error SET e Set the switch to SET V Lock The maximum test voltage flashes and can be adjusted using the A and Y buttons Turn the switch to an insulation measurement setting to make measurements The maximum test voltage value is retained in a non volatile memory It will be displayed for a few seconds on selection of an affected range e g if the maximum voltage is 750V it will be applied and displayed on all switch settings from 1000V up 22 Megohmmeter Model 6505 48 Error Messages 100M 16 106 ety A unnm e LI y Megohmmeter Model 6505 The insulation resistance is too low Check your connections The and terminal of the instrument may be short circuited The insulation resistance is outside the measurement range Check your connections One of the terminals of the instrument may be disconnected or the value measured is gt ATO The voltage present on the terminals is greater than 25VAc or 35Vpeak The instrument alerts you but does not prevent making the measure ment The voltage present on the terminals is too high for a measurement to be made peak V gt 0 4 Un The test voltage Un is indicated by the setting of the switch Eliminate the voltage and
18. nual 1 4 4 Accessories and Replacement Parts Replacement 1 ft jumper lead Cat 2119 78 Leads Set of 3 color coded 10 ft safety leads 5000V red blue black and set of 3 alligator clips 600V CAT IV Cat 2119 76 Replacement Set of 3 color coded 6 ft safety leads 5000V red blue black Cat 2119 77 Fuse set of 5 0 1A 380V 5 x 20 10kA Cat 2119 84 Replacement Small classic tool bag Cat 2133 72 Replacement Safety alligator 600V CAT IV Cat 2140 52 Replacement Safety alligator black 600V CAT IV Cat 2140 53 Replacement Safety alligator blue 600V CAT Cat 2140 54 Replacement 9 6V rechargeable NiMH battery Cat 2960 21 Replacement Power Cord 115V US Plug Cat 5000 14 Order Accessories and Replacement Parts Directly Online Check our Storefront at www aemc com store for availability 6 Megohmmeter Model 6505 CHAPTER 2 PRODUCT FEATURES 21 Description The Megohmmeter Model 6505 is a portable instrument housed in a rugged field case and operates on either battery or line power It performs voltage insulation and capacitance measurements This instrument contributes to the safety of electrical installati
19. ons and equipment Features include automatic calculation and presentation of the Dielectric Absorption Ratio DAR and Polarization Index PI The Model 6505 displays the test voltage insulation resistance and the leakage current during the test Capacitance of the sample and discharge voltage present at the test leads is displayed at the conclusion of the test This Model 6505 is designed with the highest level of built in safety features This meter incorporates test inhibit capabilities which will not allow test voltages to be generated if a live sample is detected The test terminals are recessed to ensure operating safety Features Test voltage combination of 500V 1000V 2500V and 5000V Insulation measurements from 30kO to 10TQ e Adjustable and programmable test voltage 40 to 5100V Automatic calculation of DAR and PI values Direct measurement and display of Capacitance Leakage Current Display of resistance test voltage and run time Programmable test run times and PI ratio times Automatic test inhibition if live sample gt 25 Automatic discharge and display of discharge voltage Large dual display with time voltage and measurements shown Rugged dual wall weatherproof field case Designed and built to IEC safety standards EN 61010 1 1000V CAT III Megohmmeter Model 6505 7 22 Control Features oC oto 110 230V AS caueraton z low 19 ys m SET Viock E A
20. ours and depends on the frequency of the measurements 3 6 Environmental Specifications Operating Range 14 to 104 F 10 to 40 C during recharging of batteries 14 to 131 F 10 to 55 C during measurement 10 to 80 RH Storage 40 to 158 F 40 to 70 10 to 90 RH Altitude lt 2000m Use indoors or outdoors Megohmmeter Model 6505 15 37 Mechanical Specifications Case Dimensions 10 63 x 9 84 x 7 09 270 x 250 x 180mm Weight 9 5 Ibs 4 3kg approx Mechanical Protection IP 53 per NF EN 60529 Ed 92 IK 04 per NF EN 50102 Ed 95 38 Safety Specifications Electrical safety according to EN 61010 1 Ed 2 for 2001 EN 61557 Ed 2005 C ol 1000V CAT III 2500V CAT I Pollution Degree 2 Electromagnetic Compatibility NF EN 61326 1 Ed 97 A1 industrial environment category 3 9 Variations in Operating Range Influential Range of Quantity Influence Quantity Influence Influenced Typical Max Battery V ict 2cts Voltage MO ict 3cts 5 V 0 15 R 10 C 0 3 R 10 C ict Temperature ss C MO 0 20 R 10 C 19 R 10 C 1ct V 0 2 R 1 R 2cts Humidity 20 to 80 RH MO 10kQ to 40GO 0 2 R 196 R 5cts 40GO to 10TO 3 R 15 R 5cts Frequency 15 to 500Hz V 0 3 R 0 5 ict AC voltage superimposed 0 to 20 Vn MO 0 1 R Vn ds ii iu n on test voltage The terms DAR and the capacity and current leak measurem
21. please read the Warranty Coverage Information which is attached to the Warranty Registration Card if enclosed or is available at www aemc com Please keep the Warranty Coverage Information with your records What AEMC Instruments will do If a malfunction occurs within the one year period you may return the instrument to us for repair provided we have your warranty registration information on file or a proof of purchase AEMC Instruments will at its option repair or replace the faulty material REGISTER ONLINE AT www aemc com Warranty Repairs What you must do to return an Instrument for Warranty Repair First request a Customer Service Authorization Number CSA by phone or by fax from our Service Department see address below then return the instrument along with the signed CSA Form Please write the CSA on the outside of the shipping container Return the instrument postage or shipment pre paid to Ship To Chauvin Arnoux Inc d b a AEMC Instruments 15 Faraday Drive Dover NH 03820 USA Phone 800 945 2362 Ext 360 603 749 6434 Ext 360 Fax 603 742 2346 or 603 749 6309 E mail repair aemc com Caution To protect yourself against in transit loss we recommend you insure your returned material NOTE You must obtain a CSAF before returning any instrument Megohmmeter Model 6505 27 Notes 28 Megohmmeter Model 6505 EJAEMC INSTRUMENTS 07 09 99 MAN 100339 v2 Chauvin Arnoux
22. t of the Variable Test Voltage 22 4 7 Adjustment of the Maximum Test Voltage 22 48 Error Messages ie nn 23 MAINTENANCE 24 5 1 Recharging the Battery u 24 5 2 Fuse Replacement nennen 25 9 9 Gleanilg i iiiter oett stetig 25 9 4 z e M 25 Repair and Calibration a 26 Technical and Sales Assistance sess 26 Limited Warranty i yu deii et et p itn ee eder 27 Warranty Repalfs u l E RAM E ERE 27 CHAPTER 1 INTRODUCTION WARNING This instrument is protected against accidental voltages of not more than 1000V with respect to earth in measurement Category III The protection provided by the instrument may be compromised if it is used in a way not specified by the manufacturer Make no measurements on conductors likely to be connected to a live source Comply with the rated voltage and maximum current and the mea surement category Never exceed the protection limits indicated in the specifications Comply with the conditions for use temperature humidity altitude degree of pollution and place of use Do not use the instrument or its accessories if they seem dam aged Use only the accessori
23. tage leakage current present measurement time remaining instantaneous insulation resistance value test voltage current flowing in the resistance being measured value of PI available at the end of 10 minutes value of DAR available at the end of one minute test voltage generated during the measurement Pl and DAR duration of the measurement insulation resistance value just before the measurement was stopped current that flowed in the resistance measured voltage present on the device being tested capacitance surface leakage current During the measurement 4 presses After the measurement 6 presses The values of Pl and DAR are calculated as follows PI o min R 1min 2 values to be recorded during a measurement lasting 10 min DAR 1min R 30 sec 2 values to be recorded during a measurement lasting 1 min For the calculation of the PI the times of 1 and 10 minutes can be modified by the user if required for a particular application See 4 5 1 20 Megohmmeter Model 6505 They are especially useful for monitoring the ageing of the insulation of revolving machines or of very long cables On items of this type the measurement is initially perturbed by spurious currents capacitive charging current dielectric absorption current that gradually cancel out To measure the leakage current representative of the insulation accurately it is therefore necessary to make measurements of
24. te indicated by the symbol Using a coin or a flathead screwdriver unscrew the fuse holder and remove the fuse Onlyreplace with the type of fuse specified on the label inside the unit s cover 0 1A Fast Acting 380V 5x20mm 10kA NOTE If after changing the fuse the display still indicates FUSE G the instrument must be returned to the factory for servicing 5 3 Cleaning Disconnect the instrument from any source of electricity Use a soft cloth lightly dampened with soapy water Rinse with a damp cloth and then dry with a dry cloth Do not use alcohol solvents or hydrocarbons 5 4 Storage If the instrument is not used for an extended period of time it is recom mended to charge the instrument every two or three months Megohmmeter Model 6505 25 Repair and Calibration To ensure that your instrument meets factory specifications we recommend that it be scheduled back to our factory Service Center at one year intervals for recalibration or as required by other standards or internal procedures For instrument repair and calibration You must contact our Service Center for a Customer Service Authorization Number CSA This will ensure that when your instrument arrives it will be tracked and processed promptly Please write the CSA on the outside of the shipping container If the instrument is returned for calibration we need to know if you want a standard calibration or a calibration traceable to N
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