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1000 V

1. 10k 12000 100 k 1M 10M 100 M 10000V range 1G 10G 100 G 1T 10T 10000 8000 6000 4000 2000 0 T 10k 100 k 1M 10M 100M 1G 10G 100 G 1T 10T 15000V range 16000 14000 12000 10000 8000 6000 4000 2000 0 js T 10k 100 k 1M 10M 100 M 1G 10G 100G 1T 10T 100 T 8 2 4 DAR PI AND DD m Calculation of the DAR and PI terms Specified range 0 02 50 00 Intrinsic uncertainty 5 1 pt m Calculation of the DD term Specified range 0 02 50 00 Intrinsic uncertainty 10 1 pt 8 2 5 CAPACITANCE Capacitance measurement This measurement is made following the discharging of the element tested after each measurement Specified 0 005 9 999uF 10 00 49 99yF measurement range Intrinsic uncertainty x 1096 1 pt this uncert
2. Test Run Time 00 03 00 Input voltage 0 1 V DC Frequency 0 2 Hz Input current 55 7 nA Date 2011 05 24 Time 15 31 Use the A V keys to select a preset test voltage ramp Ramp function 1 50 to 500V Ramp function 2 500 to 5 000V Ramp function 3 1 000 to 10 000V The voltages at the beginning and end of the ramp can be programmed with the CONFIG key see 4 3 The duration of the test is the sum of the three durations specified the duration of the initial plateau the duration of the ramp and the duration of the final plateau 3 3 5 WITH A STEPPED VOLTAGE The stepped voltage has ten plateaus The duration of each of the voltage plateaus is identical At the end of each plateau the capacitive current is normally zero and only the measurement current remains Unlike the ramp test the step test stresses the insulation and can cause a breakdown A sudden increase of the current or a sudden decrease of the insulation resistance means that a breakdown point is near It is then possible to discontinue the measurement by hand by pressing the START STOP button or automatically E BRK or Break at I Limit type of test see 84 3 1 A drop of 2596 or more between the insulation resistance of the first plateau and that of the second plateau is a sign of deterioration of the insulation Set the switch to U STEP The following screen appears SET UP STEP FUNCTION Min 50V 3 Max 500 V Test Run Time 00
3. During insulation measurements made in MANUAL mode with high test voltages stop the measurement by pressing the START STOP button when the measurement is over 8 3 5 DEFECT MESSAGE When a battery is deeply discharged or its storage temperature is low the charger may execute a prior battery reactivation cycle That means that the charger applies a slow charge until the battery reaches either a minimum temperature threshold or a minimum charge threshold If the battery is in good condition this reactivation stage ends after about 45 mins and the charger switches over to fast charging However if the maximum time allowed for the reactivation stage is exceeded the instrument declares the battery defective in the form of a message Defect on the screen of the measuring instrument The instrument must then be sent in for repair see 9 3 8 3 6 END OF BATTERY LIFE The internal resistance of a battery at the end of its life is high The result is an abnormally short charging time After a full charge the instrument indicates Full but as soon as the charger is disconnected the display unit loses its contrast and goes off meaning that the battery no longer holds the charge The instrument must then be sent in for repair See 9 3 for replacement of the battery 8 4 ENVIRONMENTAL CONDITIONS m Range of use The relative humidity can significantly affect insulation Take care not to make an insulation resistance mea
4. m 2 safety leads red and blue 3 metres long with high voltage plugs at both ends m 1 shielded safety lead black 3 metres long with a high voltage plug with rear pick up and a high voltage plug m 1 lead with rear pick up blue 0 5 metre long with high voltage plugs at both ends m 3 crocodile clips red black and blue m 2 test probes red and black m 5 specifications labels one per language m 6 user manuals one per language on CD ROM m 6 safety sheets one per language 11 1 ACCESSORIES Set of 3 shielded safety leads black red and blue 3 metres long with a high voltage plug at one end with rear pick up on the black lead and a large crocodile clip at the other P01295466 Shielded safety lead black 8 metres long with a high voltage plug with rear pick up at one end and a large crocodile clip at the other en P01295470 Safety lead red 8 metres long with a high voltage plug at one end and a large crocodile clip at the other P01295469 Safety lead blue 8 metres long with a high voltage plug at one end and a large crocodile clip at the other P01295468 Shielded safety lead black 15 metres long with a high voltage plug with rear pick up at one end and a larg e Grocodile clip at thhe other PLE P01295473 Safety lead red 15 metres long with a high voltage plug at one end and a large crocodile clip at the other P
5. telephony aviation etc in which it is important not to exceed some maximum test voltage For example if the maximum voltage is set to 750V the measurement will be made at 500V for the 500V fixed voltage and at a maximum of 750V for all the other fixed voltages The adjustment range is from 40 to 10 000V 15 000 V for the C A 6555 5 4 ADJUSTMENT OF THE TEST VOLTAGES Always on the third SET UP screen Adjustable Voltage 1 2 and 3 to set the values of the 3 adjustable test voltages The adjustment range is from 40 to 15000V Press the DISPLAY key to see the following screen Step amp Ramp Functions 3Set Step Function 1 Set Step Function 2 Set Step Function 3 Set Ramp Function 1 Set Ramp Function 2 C Set Ramp Function 3 DISPLAY Set Step Function 1 2 and 3 in the case of a measurement with a stepped voltage used to set the voltages and the durations of the steps Pressing the P gt key opens the following screen Step amp Ramp Functions Step amp Ramp Functions Press the DISPLAY key to Step Function 1 See the rest of INe SCreen Step Function 1 Step Voltage Duration m s Step Voltage Duration m s 31 50V 0 30 ao 300 V 0 30 2 100 V 0 30 350 V 0 30 150V 0 30 400 V 0 30 4 200 V 0 30 450 V 0 30 5 250 V 0 30 C 10 500 V 0 30 Total Run Time m s 5 00 Total Run Time m s 5 00 DISPLAY You can then set the voltage and duration of each of the 10 steps The total duration of the measur
6. the following screen Test Timing I3Timed Run m s 2 00 DAR s s 30 60 PI m m 1 0 10 C DISPLAY Timed Run to set the measurement duration in minutes seconds for measurements with programmed duration The adjustment range is from 00 10 to 99 59 in 1 second steps DAR to set the time at which the measurements must be recorded to calculate the DAR This can be used in special applications The first time can be set from 10 to 90 seconds in 5 second steps The second time can be set from 15 to 180 seconds in 5 second steps PI to set the time at which the measurements must be recorded to calculate the PI This can be used in special applications The first time can be set from 0 5 to 30 minutes in 0 5 then 1 minute steps The second time can be set from 0 5 to 90 minutes in 0 5 1 and 5 minute steps Press the DISPLAY key to see the following screen Test Parameters 3Test Type Burning Maximum Output Current 5 0 mA Maximum Output Voltage 15000 V Adjustable Voltage 1 50V Adjustable Voltage 2 800 V C Adjustable Voltage 3 7000 V DISPLAY Test Type to choose the type of test Burning Early Break or Break at I Limit Maximum Output Current to set the maximum output current from 0 2 to 5mA Maximum Output Voltage to set the maximum output voltage This can be useful to prevent handling errors It make it possible to entrust the instrument to less experienced users for particular applications
7. 55 9 3 Re uu u S KEV kK 55 9 4 Updating of the internal SOmWare witch di r kar n e a KE e VEREN Med MANAG nA H WAW HEKAN A REW d HEHE HEHEY ZEWE AW Ka Va 56 10 WARRANTY E 57 11 TO bet M Ed ada 58 IEEE vo trur uy qhaya ss 58 112 Replacement Pants izes uuu wan 58 1 COMMISSIONING 1 1 UNPACKING C960 C29 9 9 OO One power cord 2 metres long for recharging the battery One data transfer software program and one optical USB cord Two safety leads red and blue 3 metres long with high voltage plugs at both ends One shielded safety lead black 3m long with two high voltage plugs one of them with a rear pick up One safety lead blue 0 5m long with two high voltage plugs one of them with a rear pick up One carrying bag for the accessories Three crocodile clips red black and blue Two test probes red and black Six user manuals one per language on a CD ROM Six safety sheets one per language Five specifications labels one per language 1 2 SPECIFICATIONS LABEL Attach one of the 5 specifications labels with your appropriate language on the inside of the lid 1 3 CHARGING THE BATTERIES When using the instrument for the first time start by fully charging the batteries Charging must be done at
8. GRAPH 5 045 GO 5 045 GO It is possible to zoom 00 01 30 00 01 30 V 1000 750 500 250 0 The Y keys are used to modify the resistance scale of the graph Press the CONFIG key The 4 P keys are used to modify the time scale of the graph CONFIG Press the DISPLAY key to view the current vs time curve GRAPH 2 985 GO 167 8 nA 00 02 00 Axis of the current 2 985 GO 167 8 nA Minimum and maximum values of the Curve I t current at the position of the cursor DISPLAY Time axis The 4 gt keys are used to move along the curve to display the exact values of each sample It is possible to zoom as in the case of the R t and U t curves Press the DISPLAY key again to view the current vs voltage curve sk DISPLAY This curve is useful primarily in the case of a measurement in U RAMP mode There is no cursor and it is not possible to zoom on this curve 4 6 FILTER KEY When the instrument detects that the measurement is disturbed by an AC voltage that is too large it switches an analogue filter on the terminals and so indicates by displaying the DH symbol Disturbation High BI ALARM A 303 3 MO 981 V 3 244 pA Elapsed Time 00 00 48 ka MQ O TO 1 1 1 10 100 10 100 10 100 10 Complementing this the FILTER key can be used to activate and deactivate a digital filter for the insulation measurements This filter affects only the display which is
9. HELP gt 2S HELP A short press on the HELP key opens the help function in which the actions of the keys are explained This operation changes with the context setting of the switch operating mode before during or after a measurement Below an example in U FIXED mode Help DISPLAY next page GRAPH graph R t U t I t U CONFIG configuration menu FILTER 3 digital filters DF off ALARM alarm on off MEM store data record menu TEMP temperature menu Y Ab select test voltage Y lower AD higher A long press on the HELP key lets you set the contrast of the display unit and the backlighting see 81 4 5 CONFIGURATION SET UP This function is used to change the configuration of the instrument by directly accessing the parameters to be modified Set the switch to SET UP The following screen appears General Settings OSet Default Parameter Buzzer 1 Power Down On Baud rate 38400 Date 2011 05 25 Time 9 41 Temperature Unit Celsius Instrument Number 100213 Firmware 1 0 1 0 e To select and modify a parameter use the A W and P arrow keys SE e To validate a modification move the blinking cursor back to the left margin v eS To exit without applying the last modification turn the switch 5 1 RESTORING THE INITIAL CONFIGURATION To return to the initial configuration choose Set Default Parameter The instrument requests confirmation SET UP WARNING All parameters will
10. be reset O K RBGANGEL If you accept by choosing OK the following data will be modified m The audible level of the buzzer returns to 1 The automatic switching off of the instrument will occur at the end of 5 minutes The data rate will be 38400 bauds The duration of the measurements with programmed duration will be 2 minutes The sampling duration will be 10 seconds The DAR will be 30 60 and the PI 1 10 The type of test will be Burning The maximum output current will be 5mA The maximum output voltage will be 10kV 15kV for the C A 6555 The adjustable test voltages will be 50 500 and 2500V The ramp and step test voltages return to their original values as do all alarm thresholds 5 2 GENERAL PARAMETERS Buzzer to set the audible level of beeps 1 2 3 or Off no sound Power down automatic switching off of the instrument On switching off at the end of 5 minutes Off no switching off Baud rate to set the data rate to 9600 19200 38400 or 57600 bauds Date to set the date in yyyy mm dd format Time to set the time in hh mm format Temperature unit to choose the unit of temperature Celsius or Fahrenheit Instrument Number indicates the number of the instrument This line is informative and cannot be modified Firmware indicates the two version numbers of the firmware in the instrument This line is informative and cannot be modified 5 3 MEASUREMENT PARAMETERS Press the DISPLAY key to see
11. is possible to recharge the batteries while making insulation measurements provided that the voltages used are not too high and the measured values are high enough In this case the recharging time will exceed 6 hours it will depend on the frequency of the measurements made Otherwise the battery will be discharged faster than it is charged In order to extend the life of your battery W Charge your device only between 10 and 30 C m Observe the conditions of use and storage stated in this data sheet A new battery becomes fully effective only after several complete charging discharging cycles This will not however prevent you from using your device when it has been charged for the first time However we recommend making the first charge a full charge at least 10 hours If the instrument indicates that charging is over do not hesitate to disconnect the charger for a few seconds then reconnect it to top up the charge The battery in your instrument like any rechargeable battery is subject to significant residual discharging even when the instrument is off If your device has not been used for several weeks it is probable that the battery will be partially discharged even if it had been fully recharged just before going into storage In this case before using it again you should fully recharge the battery at least 10 hours The longer your battery is stored the more it is discharged After three months storage of the battery with
12. machines or fixed industrial devices m Measurement category ll corresponds to measurements taken on circuits directly connected to low voltage installations Example power supply to electro domestic devices and portable tools PRECAUTIONS FOR USE This instrument and its accessories comply with safety standards IEC 61010 1 IEC 61010 031 and IEC 61010 2 030 for voltages of 1000V in category IV at an altitude of less than 2000m indoors with a degree of pollution of not more than 2 Failure to observe the safety instructions may result in electric shock fire explosion and destruction of the instrument and of the installations m The operator and or the responsible authority must carefully read and clearly understand the various precautions to be taken in use Sound knowledge and a keen awareness of electrical hazards are essential when using this instrument If you use this instrument other than as specified the protection it provides may be compromised thereby endangering you Do not use the instrument on networks of which the voltage or category exceeds those mentioned Do not use the instrument if it seems to be damaged incomplete or poorly closed Before each use check the condition of the insulation on the leads housing and accessories Any item of which the insulation is deteriorated even partially must be set aside for repair or scrapping Use only the leads and accessories supplied Using leads or accessories of a lower vo
13. memory It is possible to modify the numbers proposed MEM key using the gt and AV keys Store MEMORY Obj Test Date Time Fct 30101 2011 05 26 09 04 500V MEM Press the MEM key again to confirm the The instrument then asks you if you want to Store Samples with location of the record the measurement Store MEMORY 01 01 2011 05 26 09 04 500V I2 Store Samples Yes MEN Sample Time m s Min If you do this you can then display the curve of the measurement by a single press on the GRAPH key see 4 5 If this is not useful set Store Samples to Off If you set Store Samples to Yes you can set the Sample Time using the gt and A V keys m The default sampling time is the minimum meaning that all samples acquired during the measurement are recorded m The sampling time can be set to Auto automatic in which case the instrument itself determines the samples necessary for the plotting of the curve while using the least possible space in memory If the measurement does not vary it will take only one value giving a perfectly flat curve This value is recommended to optimize memory use m The sampling time can also be programmed between 1 and 25 seconds m The longer the measurement the longer the sampling time can be For example on a measurement lasting 10 minutes the sampling time can be 10 seconds giving 60 points for the curve which is sufficient a Again the more stable the measurement the lo
14. of one minute or of the programmed time if different PI automatic stoppage of the measurement at the end of 10 minutes or of the programmed time if different It is always possible to stop a measurement during a test with programmed duration by pressing the START STOP button A configuration is validated by pressing the B CONFIG key again v The A W keys are used to select the BS measurement configuration The chosen CONFIG When you select Timed Run test with programmed duration or Timed Run DD you can set the duration of the measurement m s CONFIG Total Run Time 00 02 00 Manual Stop Manual Stop DD DG Mna m s Timed Run DD DAR s s PI m m Ro 30 60 1 0 10 To do this use the gt and Y keys The test will last the time programmed However if during the measurement the rotary switch is turned or the START STOP button is pressed the measurement will be broken off Press the DISPLAY key to see the second CONFIG configuration screen D B AI Burning Maximum Ouput Current 1 mA Range Auto 2 Disturbance Level Low Alarm 2500V 2 5 MO DISPLAY The second configuration screen depends on the setting of the switch The U RAMP and U STEP settings do not use the first page of the configuration screen only the second The second configuration screen is used to choose m The type of test Test Type Nondestructive test Early break The A W keys are used
15. of the test Current flowing between the Date 2011 05 23 d terminals Date and time 2 2 2 EXAMPLE OF DISPLAY DURING THE MEASUREMENT The measurement smoothing filtering is active with a time constant of 20 seconds Value of the insulation resistance The voltage generated is gt 70Vpc and therefore dangerous True value of the test voltage Value of the insulation resistance on the bargraph DF 20s ALARM 303 3 MO 3 244 uA Elapsed Time 00 00 48 MO GO TO 10 100 10 100 10 100 10 2 2 3 EXAMPLE OF DISPLAY AFTER THE MEASUREMENT The measurement range is fixed Value of the insulation resistance True value of the test voltage at the end of the measurement Ancillary results vias we N o 4 NM 995 MO 528 V 531 nA Elapsed Time 00 01 12 DAR 30s 60s PI 1 0m 10m Capacitance The P C symbol indicates blinking If values are undetermined they are represented by Programmed current limitation Current flowing between the terminals Elapsed time since the beginning of the measurement The alarm threshold has been crossed The type of measurement is a non destructive test Current at the end of the measurement Duration of the measurement 2 3 KEYPAD If the audible signal has not been deactivated in SET UP the instrument confirms each key press by an audible beep If the beep is more acute pressing the key is prohibited or
16. the instrument Outer insulation Insulation Braid Using the guard eliminates the influence of the surface leakage current 3 3 7 BEFORE THE MEASUREMENT It is possible to configure the measurement using the CONFIG key pressing the CONFIG key see 4 3 m Manual Stop Manual Stop DD Timed Run Timed Run DD DAR PI of the alarm threshold m Test Type Maximum Output Current l range Disturbance Level Alarm the programmed threshold Os OS lt gt ALARM 3 3 8 DURING THE MEASUREMENT Press the START STOP button to start the measurement START STOP At the end of a few seconds the measurement is displayed in digital form and in analog form on a bargraph Set 500 V 531 nA Elapsed Time 00 00 23 kQ MQ Q TO 1 1 gt 1 10 100 10 100 10 100 10 If the U FIXED or U VAR test voltages have been selected it is possible to select a measurement configuration by Then set the type of test the maximum current the current range the filtering of the measurement and the value To activate the alarm press the ALARM key An audible beep will sound if the result of the measurement is below The instrument generates the high voltage To indicate that the measurement is in progress the instrument emits an audible beep every ten seconds and the START STOP button lights red e If the test voltage generated is gt 5000V the START STOP button blinks START STO
17. the instrument is configured for a manual stop once the measurement obtained is stable press the START STOP button again to stop the measurement In the other cases programmed duration Timed Run Timed Run DD DAR PI U RAMP or U STEP the measurement stops automatically at the end of the test At the end of the measurement the instrument switches back to voltage measurement but the result of the insulation resistance measurement remains displayed To display the voltage press the DISPLAY key Value of the insulation resistance Value of the test voltage at the end of the measurement Ancillary results 3 3 9 AFTER THE MEASUREMENT N o 995 MO 528 V 531 nA Elapsed Time 00 01 12 DAR 30s 60s PI 1 0m 10m Capacitance Type of test The alarm is active and the threshold has been crossed Current at the end of the measurement Duration of the measurement Once the measurement has been stopped the instrument discharges the device being tested in a few seconds For your safety therefore wait a little before disconnecting the leads Normally this happens rapidly and the user is unaware of it But if the load is highly capacitive the discharging time is longer In this case for as long as the voltage exceeds 25V the instrument so indicates on the display unit and by an audible signal i DISPLAY E BRK 995 MO A 502 V 503 nA Elapsed Time 00 01 20 DAR 30s 60s 1 0
18. this value it reports an error and does not make the measurement 3 3 2 WITH A FIXED VOLTAGE Set the switch to U FIXED SET UP The following screen appears BURN FIXED VOLTAGE GT N OY ooov Input voltage 10V AC Frequency 50 0 Hz Input current 24 pA Date 2011 05 23 Time 10 31 Use the 4 gt keys to select the test voltage 500 1 000 2 500 5 000 10 000 or 15 000Vpc When the resistance to be measured is low R lt R U 1mA the voltage generated is lower than the fixed voltage selected In this case it is better to use a variable voltage and adjust U to the desired value after a first resistance measurement 3 3 3 WITH A VARIABLE VOLTAGE Set the switch to U VAR SET UP The following screen appears BURN ADJUSTABLE VOLTAGE 50 V Input voltage Frequency Input current Date 2011 05 24 Time 15 31 There are already 3 preset voltages that can be modified in SET UP see 85 Use the Y keys to select one of them Adjustable Voltage 1 50V Adjustable Voltage 2 800V Adjustable Voltage 3 7 000V Otherwise use the lt J keys to go to the voltage value then use the AW keys to adjust the value of the test voltage The adjustment is in 10V steps up to 1 000V then in 100V steps Keep the keys pressed to speed up the adjustment BURN ADJUSTABLE VOLTAGE 750 V Input voltage 0 1 VAC Frequency 0 2 Hz Input current 11 pA Date 2011 05 24 T
19. to select the measurement configuration The chosen configuration is validated by pressing the CONFIG key again a ji amp ECH CONFIG The measurement will be stopped at the first breakdown current peak detected This type of test is used for non destructive tests The current is limited to 0 2 mA The E BRK symbol is displayed FIXED VOLTAGE E BRK soov Willi 2500v Input voltage Frequency Input current Date 2011 05 23 Time 10 31 10V AC 50 0 Hz 24 pA Stoppage of the test at a preset current Break at I limit The measurement will be stopped when the current reaches the maximum value Maximum Output Current defined by the user See below This type of test is useful for testing varistors or other types of voltage limiter The I LIM symbol is displayed I LIM FIXED VOLTAGE soov Bie eje 2500v Input voltage 10VAC Freguency 50 0 Hz Input current 24 6 nA Date 2011 05 23 Time 10 31 Burning Burning The measurement is not stopped whatever the value of the current Depending on the application this type of test can be used to determine the position of insulation faults when there is Burning appearance of an electric arc during the test or burn spot after the test The BURN symbol is displayed BURN FIXED VOLTAGE soov Bie eje M 2500v Input voltage 10VAC Frequency 50 0 Hz Input current 24 6 nA Date 2011 05 23 Time 10 31 m The maximum curre
20. use the MEM MR functions once again m f necessary reset the date and time of the instrument see 5 m Fully recharge the battery 9 1 3 REPLACING THE FUSE If the GUARD FUSE message appears on the display unit the guard terminal fuse must be replaced The fuse can be replaced only by competent accredited personnel 9 1 4 STORAGE If the instrument has not been used over a prolonged period more than two months fully charge the battery before use 9 2 METROLOGICAL CHECK A Like all measuring or testing devices the instrument must be checked regularly This instrument should be checked at least once a year For checking and calibration contact one of our accredited metrology laboratories information and contact details available on request at our Chauvin Arnoux subsidiary or the branch in your country 9 3 REPAIR For all repairs before or after expiry of warranty please return the device to your distributor 9 4 UPDATING OF THE INTERNAL SOFTWARE With a view to providing at all times the best possible service in terms of performance and technical upgrades Chauvin Arnoux invites you to update the embedded software of the device by downloading the new version available free of charge on our web site Our site http www chauvin arnoux com Sign in and open your account Then go to Support then Download Firmware Update then Firmware then C A 6550 and C A 6555 Connect the device t
21. will have no effect A long press press maintained for more than two seconds is confirmed by a second audible beep 2 4 PC SOFTWARE This Pc software is used to m transfer data stored in the instrument m print customised test protocols in accordance with user needs m create Excel spreadsheets m to set the instrument up and control it entirely via the USB link The recommended minimum configuration is a PC running XP Vista or Windows 7 3 PROCEDURE When they leave the factory the C A 6550 and C A 6555 are configured so that they can be used without modifying the parameters For most measurements you simply choose the test voltage and press the START STOP button If you want to modify parameters most of them can be configured using the CONFIG key and also in SET UP The SET UP function allows overall configuration of the instrument independently of which measurement functions are chosen The CONFIG key allows configuration of the chosen measurement function before and during a measurement A configuration modified in one of these two ways is updated for both SET UP or CONFIG key 3 1 USING THE LEADS Specific leads are supplied with the instrument To use them you must add test probes or crocodile clips also supplied with the instrument AN These accessories have guards For safety reasons the user s hands must always be behind the guard The positions the hands must not go beyond are indicated below
22. 0 PI 1 0m 10m Capacitance 1 nF The DISPLAY key is used to look up all information available after the measurement This information depends on the type of measurement chosen see 84 4 In the case of a ramp or step measurement the measurement result is displayed as follows Test with programmed duration Value of the insulation resistance Auitentcat the ana GE the measurement 98 7 nA Value of the test voltage at the i Duration of the measurement end of the measurement Remaining Time 00 00 00 47 9 MO AR difference of insulation 53 3 V Voltage coefficient in ppm V resistance between the final resistance highest test voltage AR R AV ppm V 9 Capacitance of the device and the initial resistance lowest Capacitance lt 1 nF lasted test voltage AV difference between the final and initial test voltages Record the measurement and compare it to earlier measurements in order to assess the evolution of its value Also record the temperature and the ambient relative humidity If at equivalent temperature and humidity the insulation resistance has fallen significantly the insulation is deteriorated and maintenance must be carried out on the device tested The result remains displayed until another measurement is made the switch is turned or the measurement configuration is changed After a test with programmed duration pressing the GRAPH key displays the insulation versus time curve
23. 01295472 Safety lead blue 15 metres long with a high voltage plug at one end and a large crocodile clip at the other P01295471 Thermocouple thermometer C A 861 crine ci eere ie dece Sal kd he RADER A LRL ADEM LER n ic a e ka dka ENER P01650101Z Thermo hygrometer C EE P01156301Z 11 2 REPLACEMENT PARTS One carrying DAG M P01298066 Set of 3 HV leads 3 metres long red blue and black with rear pick up essen P01295465 Lead with rear pick up blue 0 5 metre Jong en P01295467 Set of 2 test probes red Nee EE P01295454Z SeLOF Crocodile CIPS CER P01103062 OptiCal USB COMM u uu HX0056 Z iiU colo E aces iln goo coe P01295174 GROUP DEUTSCHLAND Chauvin Arnoux GmbH StraBburger Str 34 77694 Kehl Rhein Tel 07851 99 26 0 Fax 07851 99 26 60 ESPA A Chauvin Arnoux Ib rica S A C Roger de Flor 293 1a Planta 08025 Barcelona Tel 902 20 22 26 Fax 93 459 14 43 ITALIA Amra SpA Via Sant Ambrogio 23 25 20050 Macherio MI Tel 039 245 75 45 Fax 039 481 561 OSTERREICH Chauvin Arnoux Ges m b H Slamastrasse 29 2 4 1230 Wien Tel 01 61 61 9 61 0 Fax 01 61 61 9 61 61 SCANDINAVIA CA Matsystem AB Box 4501 SE 18304 TABY Tel 46 8 50 52 68 00 Fax 46 8 50 52 68 10 CHAUVI ARN N OUX 02 2012 Code 692790A02 Ed 2 SCHWEIZ Chauvin
24. 05 00 Input voltage 1VAC Freguency 50 0 Hz Input current 24 6 nA Date 2011 05 24 Time 15 31 Use the A V keys to choose the preset step type of test Step function 1 50 to 500V Step function 2 500 to 5 000V Step function 3 1 000 to 10 000V The values of the voltages at the beginning and end of a step the number of steps and the duration of each step can be programmed using the CONFIG key see 4 3 3 3 6 CONNECTION Depending on the measurements to be made there are three ways of connecting the instrument In all cases disconnect the device to be tested from mains B Low 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 m High insulation For very high insulation values connect the small blue high voltage lead between the rear pick up of the black lead and the G terminal of the instrument in order to avoid leakage current and capacitive current effects or to eliminate the influence of the surface leakage current This reduces the influence of the operator s hands and gives a more stable measurement m Cable Connect the red high voltage lead between the braid and the terminal of the instrument 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
25. 15 5 pt 30 5 pt 5 V AC voltage superimposed 20 Un MO 0 1 Un 0 5 Un 5 pt on test voltage 1 The DAR PI and DD terms and the capacitance and leakage current measurements are included in the quantity MQ x Humidity 8 8 INTRINSIC UNCERTAINTY AND OPERATING UNCERTAINTY C A 6550 and C A 6555 megohmmeters comply with standard IEC 61557 which requires that the operating uncertainty called B be less than 3096 In insulation measurements B IAI 1 15 VE E E with A intrinsic uncertainty E influence of the reference position 90 E influence of the supply voltage within the limits indicated by the manufacturer E influence of the temperature between 0 and 35 C 9 MAINTENANCE A Any unauthorized repair or replacement of a part by an equivalent may gravely impair safety 9 1 MAINTENANCE 9 1 1 CLEANING Disconnect the unit completely and turn the rotary switch to OFF Use a soft cloth dampened with soapy water Rinse with a damp cloth and dry rapidly with a dry cloth or forced air Do not use alcohol solvents or hydrocarbons 9 1 2 REPLACING THE BATTERIES The batteries can be replaced only by competent accredited personnel Warning replacing the battery entails the loss of the stored data Back up these data before sending the instrument in for repair When the repaired instrument is returned m Erase the memory completely see 6 3 2 to be able to
26. 500 1600 5100 5100 16000 range V m Measurement of the DC voltage during the discharging stage of the insulation test Specified measurement 25 16000V range Vpc Intrinsic uncertainty 5 3 pt m Typical discharge time of a capacitive element to reach 25Vpc 100V 250V 500V 1000V 2500V Discharge time C at HF 0 25 s x C 5ooov wax 15000V Discharge time C at uF W Typical curves of evolution of the test voltages as a function of the charge 500V range 600 500 400 300 200 100 10k 100 k 1M 10M 100 M 1G 10G 100 G 1T 1000V range 1200 1000 800 600 400 200 10k 100 k 1M 10M 100 M 1G 10G 100G 1T 10T 2500V range 3000 2500 2000 1500 1000 500 10k 100 k 1M 10M 100 M 1G 10G 100 G 1T 10T7 6000 5000V range 5000 4000 3000 2000 1000
27. Arnoux AG Moosacherstrasse 15 8804 AU ZH Tel 044 727 75 55 Fax 044 727 75 56 UNITED KINGDOM Chauvin Arnoux Ltd Unit 1 Nelson Ct Flagship Sq Shaw Cross Business Pk Dewsbury West Yorkshire WF12 7TH Tel 01924 460 494 Fax 01924 455 328 MIDDLE EAST Chauvin Arnoux Middle East P O BOX 60 154 1241 2020 JAL EL DIB Beirut LEBANON Tel 01 890 425 Fax 01 890 424 CHINA Shanghai Pu Jiang Enerdis Instruments Co Ltd 3 F 3 rd Building N 381 Xiang De Road 200081 SHANGHAI Tel 86 21 65 21 51 96 Fax 86 21 65 21 61 07 USA Chauvin Arnoux Inc d b a AEMC Instruments 200 Foxborough Blvd Foxborough MA 02035 Tel 508 698 2115 Fax 508 698 2118 http www chauvin arnoux com 190 rue Championnet 75876 PARIS Cedex 18 FRANCE T l 33 1 44 85 44 85 Fax 33 1 46 27 73 89 info chauvin arnoux fr Export T l 33 1 44 85 44 38 Fax 33 1 46 27 95 59 export chauvin arnoux fr
28. C A 6550 C A6555 MEGOHMMETERS 10 kV AND 15 kV CHAUVIN b ARNOUX User s manual CHAUVIN ARNOUX GROUP Thank you for purchasing a megohmmeter C A 6550 or C A 6555 For best results from your instrument m read these operating instructions carefully m comply with the precautions for use WARNING risk of DANGER The operator must refer to these instructions whenever this danger symbol appears Equipment protected by double insulation Caution Risk of electric shock USB socket Earth The CE marking indicates conformity with European directives in particular LVD and EMC Chauvin Arnoux has adopted an Eco Design approach in order to design this appliance Analysis of the complete lifecycle has enabled us to control and optimize the effects of the product on the environment In particular this appliance exceeds regulation requirements with respect to recycling and reuse The rubbish bin with a line through it indicates that in the European Union the product must undergo selective disposal in compliance with Directive WEEE 2002 96 EC This equipment must not be treated as household waste Definition of measurement categories m Measurement category IV corresponds to measurements taken at the source of low voltage installations Example power feeders counters and protection devices m Measurement category III corresponds to measurements on building installations Example distribution panel circuit breakers
29. NDEX In the case of multilayer insulation if one of the layers is defective but the resistance of all the others is high neither the quantitative insulation measurement nor the calculation of the PI and DAR quality ratios will reveal the problem This makes it judicious to perform a dielectric discharge test from which the DD term can be calculated This test measures the dielectric absorption of heterogeneous or multilayer insulation and disregards parallel surface leakage currents The dielectric discharge test is especially well suited to measuring the insulation of revolving machines and more generally to measuring the insulation on heterogeneous or multi layer insulating materials containing organic substances It involves applying a test voltage for long enough to electrically charge the insulation to be measured typically a voltage of 500 V is applied for 30 minutes At the end of the measurement the instrument induces rapid discharging during which the capacitance of the insulation is measured then one minute later it measures the residual current flowing in the insulation The DD term is then calculated as follows DD current measured after 1 minute mA test voltage V x measured capacitance F 3 6 1 MEASUREMENT Press the CONFIG key CONFIG Total Run Time D MEWE Kole Manual Stop DD Timed Run m s Timed Run DD C DAR s s CONFIG PI m m Use the Wkeys to select Manual Stop DD or Time
30. P If the measurement is unstable the instrument automatically filters the signal but it is possible to apply a digital filter in addition by pressing the FILTER key see 84 6 i FILTER Itis possible to view the available digital values by pressing the DISPLAY key 995 MC 528 V Set 500 V 531 nA Elapsed Time 00 01 12 DAR 30s 60s 1 00 PI 1 0m 10m C Capacitance DISPLAY In the case of a step test voltage 10 steps at most or ramp test voltage 3 steps the progress of the steps is indicated Step 2 10 11030 V Step 2 10 209 4 nA Remaining measurement time Voltage of the second step Remaining Time 00 01 2 kQ MQ Q TO 1 1 i 1 10 100 10 100 10 100 10 You can view the resistance voltage and current vs time curves by pressing the GRAPH key For more details refer to 8 4 5 BE It is also possible to change the measurement parameters by pressing the CONFIG key It is possible to fix the measurement current to add an analogue filter or to change the test voltage if in the variable test voltage mode U VAR For more details refer to 4 3 CONFIG In the case of a ramp measurement the resistance displayed is always greater than the true resistance because of the permanent capacitive current due to the permanent variation of the voltage The value displayed will be exact only at the end of the test during the voltage plateau H START STOP When
31. When measuring m avoltage lt 1000V on mains m insulation using a test voltage lt 5000V For an insulation measurement with a test voltage 25000V Measurements of voltages 21000V on mains must be made using the test probes only with the user s hands behind the guard on the lead Remark The leads with large clips automobile battery charger type proposed as accessories cannot be used for mains voltage measurements because their jaws are not insulated 3 2 AC DC VOLTAGE MEASUREMENT Turning the switch to any insulation measurement position U FIXED U VAR U RAMP or U STEP sets the instrument to AC DC voltage measurement The voltage between the input terminals is measured at all times and indicated as RMS value on the display unit Input Voltage Switching between AC and DC mode is automatic In the case of an AC signal the instrument measures the frequency It also measures the residual DC current between the terminals of the instrument This measurement is used to evaluate its impact on the insulation measurement about to be made The insulation measurements cannot be started if there is an excessively high external voltage gt 0 4 U where U is the test voltage with a maximum of 1000 Vac on the terminals FIXED VOLTAGE 500 V iov Input voltage zA 230 V AC Freguency 50 0 Hz Input current 24 6 nA Date 2011 05 23 Time 10 31 When the external voltage exceeds 25V the blinking N symbol is
32. Wkeys to select DAR or PI CONFIG Total Run Time 00 01 00 Manual Stop Manual Stop DD Timed Run m s 2 00 Timed Run DD D BYNzI s s 30 60 PI m m 1 0 10 Press CONFIG to confirm the new measurement configuration DAR or PI is displayed in the top left corner of the display unit to recall the configuration chosen CONFIG 502 MQ 502 V 978 nA Elapsed Time 00 10 10 DAR 30s 60s PI 1 0m 10m Capacitance CONFIG Total Run Time gt Manual Stop DD Timed Run m s Timed Run DD DAR s s PI m m CONFIG Total Run Time Manual Stop Manual Stop DD Timed Run m s Timed Run DD DAR s s D allm m Press the START STOP button to start the measurement It stops automatically and the values of DAR and PI are displayed START STOP 3 5 2 INTERPRETATION OF THE RESULTS PI lt 1 DAR lt 1 25 Poor or even dangerous 1 lt Pl lt 2 A capacitance in parallel to the insulation resistance extends the settling times of the measurements This can affect or even inhibit the measurement of DAR or PI depending on the time set for recording the first resistance value The table below indicates the typical values of the capacitances in parallel with the insulation resistance making it possible to measure the DAR and the PI without changing their preset durations 5 000 V ou Le ospr our 10 000V 0 54F 0 5 UF 0 5 uF 0 3 uF 0 2 uF 15 000 V 3 6 DD DIELECTRIC DISCHARGE I
33. a temperature between 0 and 30 C Set the switch to OFF Connect the mains cord SET UP gt 90 Vac lt 260 Vac 50 60 Hz During the charging the instrument displays the following information The percentage charge of each of the batteries their voltages their charging currents their temperatures and the charging times Battery 1 2 Charging 12 4V To reduce the power to be supplied and make it possible to use the 1953 mA instrument during the charging the batteries are charged alternately o at 2A for 10 seconds It is for this reason that the charging current 26 4 C keeps varying 00 05 30 Battery2 3 11 7V m Charging battery being charged The text on the side indicates 13 mA 26 7 C 00 05 20 Full battery fully charged Cold battery too cold to be charged Hot battery too hot to be charged Defect battery faulty must be replaced Charging time between 6 and 10 hours depending on the initial charge condition Battery 1 100 11 4V 15 mA 55 1 C 02 34 41 Battery 2 100 11 4V 15 mA 55 1 C 02 34 24 Following prolonged storage the batteries may be completely discharged In this case the first charge may last longer Charging when the instrument is in operation is also possible In this case the symbol flashes The charging current then depends on the test voltage and on the resistance measured If the power necessary for the measurement ex
34. ainty is specified only for a test voltage 2500V 8 3 POWER SUPPLY Power supply to the instrument is from two rechargeable 9 6V 4Ah NiMH battery packs Charging is carried out by connecting the instrument to mains at a voltage of 90 to 260V and a frequency of 50 60Hz with an ambient temperature of 0 to 30 C 8 3 1 NIMH TECHNOLOGY The NiMH technology has many advantages such as long life between charges with limited bulk and weight m the possibility of recharging your battery rapidly m avery small memory effect you can recharge your battery even if it is not fully discharged without reducing its capacity m protection of the environment through the absence of polluting materials such as lead and cadmium The NiMH technology allows a limited number of charging discharging cycles that depends on the conditions of use and the charging conditions Under optimum conditions this number of cycles is 200 8 3 2 BATTERY CHARGING The built in charger manages the charging current the battery voltage and the internal temperature of the battery simultaneously This optimizes the charging while ensuring a long battery life The day before you use your device check its charge condition If the battery level indicator shows less than three bars charge the device overnight see 81 3 The charging time varies between 6h and 10h A half hour charge restores 1096 of the capacity of the battery enough to make a few measurements It
35. ble signal START STOP A Elapsed Time 00 02 00 DAR 30s 60s 1 42 PI 1 0m 10m Capacitance 2 nF DD current 11 pA 2 55 3 6 2 INTERPRETATION OF THE RESULT Value of DD Quality insulation 3 7 CAPACITANCE MEASUREMENT The capacitance measurement is made automatically during the insulation measurement and is displayed after the measurement has been stopped and the device tested has been discharged 3 8 MEASUREMENT OF THE RESIDUAL CURRENT The measurement of the residual current flowing in the device tested is made automatically as soon as the connection to the device tested is made then during and after the insulation measurement 4 COMPLEMENTARY FUNCTIONS 4 1 TEMP KEY This function is accessible only when the measurement is over It is used to refer the measurement result to a temperature other that the one at which the measurement was made This is because the temperature causes the resistance to vary according to a quasi exponential law To a rough approximation raising the temperature by 10 C halves the insulation resistance conversely lowering the temperature by 10 C doubles the insulation resistance Referring the measurements to a single temperature makes it easier to compare them and gives a better idea of the evolution of the insulation resistance And this is true whatever the temperature at the time of the measurement Similarly measuring the humidity improves the correlation bet
36. ceeds 10W the batteries are no longer charged 1 4 ADJUSTING THE BRIGHTNESS AND CONTRAST Press the HELP key for more than two seconds gt 2s Us HELP Press the HELP key to validate HELP Press the lt J keys to adjust the contrast Press the A V keys to adjust the brightness CONTRAST amp BACKLIGHT NENNEN Display Contrast lt gt Backlight These adjustments are stored even after the instrument is switched off 2 DESCRIPTION OF THE INSTRUMENT dOLS LYVLS CY out snsJeA S NI eBe3o SA SjueuJeunseeuJ pue oeouejsisaJ y Jo Aide eui Jo Bulyjoows iuBipoeq pue dat HdVH5 dari sJe eu e ed jJu uu inse uu e Jo yjyuesu u_inse u eui siu uu inse uu SJojeuJeJed ug jo Aejdsiq o uoije4n 81ju025 oui JO Bulpsooey SjueugeJnseeuJ aul dois pue els ol AV IdSIa 9IJNOO IN3IN ueeJos oiudej6 y ui Bulsmoiq J0J S 8Y MOJJV pear Aouuawu JO qr1 13S uoljoun 1u uu inse uu 199J8S 0 YMS AIEIOH Od 0 ejep I JO 1eJsueJ r Koy d13H eJ njeJedu e Su J J 1l y O1 NBA eouejsisoJ poanseou eui J9j8J OL diN3 L suueje eui Jo BuluuujeAjBouiq suueje eui JO UOIBAHOBDP UONBAHDY NYV1V Seulu UOHD9UUOJ ueaJos Sludeio sousyeg Bu 6 euo O 2 1 FUNCTIONS C A 6550 and C A 6555 megohm
37. ciz r k ENNEN ca a d xa daa alya ada eka drag 38 6 iz eiduthleje B H 39 6 1 Recording ed EE EE 39 6 2 Reading recorded values lak rr edt nere aeta saya ke kan n d z ke Kaka K k Ka eka wada ku a wika Kul e cawen Xuwa DERA n va kaka S VEWRE 41 6 3 Erasing the memory Suyu muu ka Tar ee ess iy n kaye eee be U V N A VERE wd RE DI Ve GIVE M H e VA be KONE AZ VO Sa YEN 42 6 4 List OF coded Ee 44 7 DATA TRANSFER SOFTWARE U uU U u Uu u u U u uuu uuu RR RRA A KA HAA KRA RA HAWAR RAWA HRRK uuu uuu A HE HA RA 45 ze qe 46 a Dee Le ue E 46 8 2 Gharacteristics per NGOM O gt _ gt gt O O OKeeePeeeeeeeeeEEEeebeeeeeWWEDDrrrrKFK X Rrr E mm r KASARE 46 posto soe T anun S k n PUC oba a ee est ee ey usah r Sant n l suyan Se oo feat oa EE ok Avon 52 8 4 Environmental conditions orte eec cipe dere eka de sekan ke kk ona Kad ASE R kk a Qu r ka kala ke ad Z a k da a SA ne 53 8 9 C nsStr ctioN Specificato Maec S 54 8 6 Compliance with international standards uu uuu u Uu causcetataciedsacensesescanencesatacecauaiucyaabedeandseds 54 ENEE Re Ee 54 8 8 Intrinsic uncertainty and operating uncertainty ciccccecccccseacascedscevceccasaecieantvendeceasuccaduacecyecnibecavaedneeastenachocadvectenseaczectenecs 54 9 MAINTENAN CE TEE 55 9 1 Tun Eu 55 9 2 MetrologicalCh CK TE
38. d Run DD manual or automatic measurement CONFIG Total Run Time Manual Stop Co IER eE Timed Run m s Timed Run DD DAR s s PI m m CONFIG Total Run Time 00 03 00 Manual Stop Manual Stop DD Timed Run m s 2 00 DAR s s 30 60 PI m m 1 0 10 To set the duration of the measurement place the cursor on Timed Run m s Then use the gt and A Y keys to set the minutes and seconds The minimum duration of the measurement is one minute CONFIG Total Run Time 00 02 00 Manual Stop Manual Stop DD D M s E00 Timed Run DD DAR s s 30 60 PI m m 1 0 10 Press the START STOP button to start the measurement START STOP Once the duration has been set move the cursor back to Timed Run DD Press CONFIG to confirm the new measurement configuration DD or DD is displayed in the top left corner of the display unit to recall the configuration chosen ji In the Manual Stop DD configuration wait until the elapsed time is greater than one minute then press the START STOP button to stop the measurement In the Timed Run DD configuration indicated by the symbol the measurement stops automatically In both cases it is necessary to wait one minute after the The result is then displayed measurement is stopped countdown on the display unit for the instrument to display the result During this time the START STOP button blinks but the instrument does not emit an audi
39. displayed alongside it The only errors possible in a voltage measurement are m The frequency is outside the measurement range see 8 2 1 m The voltage is outside the measurement range see 8 2 1 3 3 INSULATION MEASUREMENT KE The insulation measurement is made on an object that is not live ZAT This measurement varies greatly with the temperature and the relative humidity It is therefore essential to measure them and to record them with the insulation value 0 M ER Jo The ambient temperature can be entered in the instrument as a parameter making it possible to refer the measured insulation resistance value to a reference temperature see 4 1 The value of the test voltage is generally twice the voltage at which the object to be tested is used unless a standard stipulates otherwise For example for a motor that operates on 230V mains the test will be performed at 500V 3 3 1 DESCRIPTION OF THE MEASUREMENT PRINCIPLE The instrument generates a DC test voltage equal to the chosen nominal voltage U between the and terminals More precisely the value of this voltage depends on the resistance to be measured see the curves of 88 2 3 The instrument measures the voltage and the current between the two terminals and from them deduces R V I The instrument measures the external voltage present on the terminals It can make the measurement if the peak voltage is less than 0 4U or 1000 Vac maximum Beyond
40. ement Total Run Time is calculated by the instrument The adjustment range of the voltages is from 40 to 15 000V The duration of the steps ranges from 00 10 to 99 59 If a duration is set to 0 the time displayed is and the step will be skipped during the test Set Ramp Function 1 2 and 3 in the case of a measurement with a ramped voltage used to set the starting voltage the slope of the ramp and the final voltage Pressing the P gt key opens the following screen Step amp Ramp Functions Ramp Function 1 Step Voltage Duration m s 3 Start 50V 0 30 Ramp 2 00 End 500 V 0 30 Total Run Time m s 3 00 You can then set the voltage and duration of the starting plateau and of the final plateau along with the duration of the ramp The total duration of the measurement Total Run Time is calculated by the instrument The voltages can be adjusted in two ranges between 40 and 1 100V or between 500 and 15000V The duration of the steps can range from 00 10 to 99 59 Then to validate your modifications and exit press the key 5 5 ADJUSTMENT OF THE ALARM THRESHOLDS Press the DISPLAY key to see the following screen Alarm Settings lt 500 kQ lt 1 0 MO 2 5 MO lt 5 0 MO 10000 V lt 10 MQ C 15000 V lt 15 MO DISPLAY Adjustable Voltage 1 lt 50kQ Adjustable Voltage 2 lt 100 ko Adjustable Voltage 3 lt 250 ko These are the alarm thresholds below which the audible alarm is triggered The
41. en the symbol indicates that the samples have been recorded you can press the GRAPH key to view the curve 0bj Test Date 0202 2011 05 27 Step Function Step Voltage 6 600 V 7 700 V 8 800 V DISPLAY 9 900 V 10 1000 V Time Fct lr Recall MEMORY 500 V 5 02 GO 00 04 59 500 V 5 02 GO 00 04 59 10 43 GO V 10 0 Duration m s 0 30 0 30 0 30 0 30 0 30 1000 7 5 750 GRAPH 5 0 500 2 5 250 0 0 0 6 00 Press the GRAPH key to exit from the curve In the case of a U FIXED or U VAR measurement you can press the TEMP key to view the information concerning the temperature The instrument can display only the information recorded with the measurement 0bj Test Date 05 02 2011 05 27 Air Temperature Time Fet 10 43 2500V 23 C Humidity Probe Temperature Rc Reference Temperature AT for R 2 4096 23 C 40 C 10 C TEMP 5 00 GO 1 529 GQ R measured Rc at 40 C EE Press the TEMP key then the 4 key to return to the list of recorded measurements TEMP 6 3 ERASING THE MEMORY Set the switch to MR 6 3 1 ERASING ONE RECORD Use the Wkeys to select the record to be erased in Press the CONFIG key the list of records in memory The instrument requests confirmation of the deletion Store MEMORY MEMORY WARNING 0bj Test Date Time Fot W lo 2011 05 28 09 04 SP UT U o z VOUS CO9UV Selected data set 0202 2011 05 27 10 43 n Will be c
42. ime 15 31 3 3 4 WITH A VOLTAGE RAMP This test is based on the principle that an ideal insulation produces the same resistance whatever the test voltage applied Any negative variation of the insulation resistance therefore means that the insulation is defective the resistance of defective insulation decreases as the test voltage increases This phenomenon is barely observable with low test voltages At least 2 500V must therefore be applied Since the application of the voltage is gradual it causes no premature ageing or deterioration of the device tested Unlike the increase in steps the gradual increase of the current means that the capacitive current is constant A variation of the current therefore directly represents a variation of the insulation resistance Evaluating the result m a negative slope of the resistance versus test voltage curve exceeding 500ppm V generally indicates the presence of mildew or other deterioration a larger negative slope or a sudden drop indicates the presence of localized physical damage arcing perforation of the insulation etc The test with a voltage ramp is ideally suited for testing semiconductors diodes transistors and thyristors Take care in this case to choose a non destructive type of test Break at I limit see S 4 3 1 and a maximum output current less than or equal to 1 mA Set the switch to U RAMP The following screen appears OE WN RAMP FUNCTION Min 50V i Max 500V
43. leared 0201 2011 05 27 10 38 0102 2011 05 26 15 04 d 0101 2011 05 26 14 56 CONFIG O K D3CANCEL Select OK to confirm or CANCEL to cancel The instrument then returns to the memory read entry screen Objet Tests 01 08 A V select Object p show list at Object 6 3 2 ERASING ALL RECORDS The instrument requests confirmation of the deletion Select OK to confirm or CANCEL to cancel Objet Tests MEMORY Press the 01 08 CONFIG key WARNING ji All data sets will be cleared EL T O O K xn 3CANCEL The instrument in this case completely reformats the memory which takes a few minutes During this time it displays WAIT The instrument then returns to the memory read entry screen But since there is no longer any record it displays No data records 6 4 LIST OF CODED ERRORS If an anomaly is detected when the instrument is started up or in operation the display indicates an error code The format of this error code is a one or two digit number This number identifies the anomaly and states what to do to put the instrument back into service Errors 1 to 9 concern problems on the boards and require a repair by a qualified individual Error codes 20 to 25 help the repair personnel locate a malfunction If the recorded data are corrupted the only way to make it possible to re use the memory is to erase it completely see 6 3 2 The instrument reports this problem to the use
44. ltage or category reduces the voltage or category of the combined instrument leads or accessories to that of the leads or accessories Use personal protection equipment systematically Keep your hands away from the terminals of the instrument When handling the leads test probes and crocodile clips keep your fingers behind the physical guard As a safety measure and to avoid interference do not move and do not handle the leads during measurements CONTENTS IMee ukecm 4 ME esno 4 1 2 Specifications label m 5 1 3 Charging EE IU 5 1 4 Adjusting the brightness and Contrast u R u Su eed ee VO ASR DO o ono 6 2 DESCRIPTION OF THE INSTRUMENT uu u ul l U u u uu u UR KA RR HA u UU Uu 7 2 E Ge oy aks erates u n n uno su eM er D aR Pm na ana ar e K dU ew a U PETTY eer ne eT LT uay 8 2 2 DISPLAY ses 8 PES ROWAN uc 10 UE Mere me 10 uise lre 11 1 Using the zoo RN M 11 3 2 AC DG voltage meastr E EE 12 3 3 Ee Ba E E 12 A AERO INOICAGONS 13 un u e nu um E ate E 21 3 5 DAR dielectric absorption ratio and PI polarizati
45. measurements that can be recorded depends on the type of measurement and the number of samples stored for each measurement The instrument can use up to 64kb for data storage and 1 600kb to store samples It is therefore possible to store 256 measurements and 80 000 samples associated with these measurements 6 2 READING RECORDED VALUES Set the switch to MR Choose the object number using the A Y keys then press the J key The instrument then displays the list of records around the object chosen Date Time Fet 2011 05 28 09 04 2550V 2011 05 27 10 43 ler 2011 05 27 10 38 L 2011 05 26 15 04 1000V 2011 05 26 14 56 DOUM Press the DISPLAY key to see the rest of the display Obj Test Date Time 02 02 2011 05 27 10 43 AR AM AR R AV ppm V Capacitance The instrument indicates the memory occupancy and the object number of the last record made along with the lowest and highest test numbers it contains Objet Tests 01 08 A V select Object show list at Object To see details of a measurement place the cursor on the object and the test chosen using the A V keys then press the J key Obj Test Date Time Fct 02 02 2011 05 27 10 43 Resistance Voltage Current Elapsed time Obj Test Date Time Fct 02 02 2011 05 27 10 43 LC Step Function Step Voltage Duration m s 100 V 0 30 200 V 0 30 300 V 0 30 400 V 0 30 500 V 0 30 8 DISPLAY Wh
46. meters are high end portable measuring instruments intended for the measurement of very high electrical insulation and resistance values mounted in a rugged site housing with a cover they have graphic screens and can operate on battery or mains power The C A 6550 makes insulation measurements at voltages up to 10 000V the C A 6555 up to 15 000V Their main functions are m detection and measurement of input voltage frequency and current m quantitative and qualitative insulation measurement m measurement at a fixed test voltage of 500 1 000 2 500 5 000 10 000 or 15 000Vpc measurement at an adjustable test voltage between 40 and 15 000V pc measurement with a voltage ramp from 40 to 1 100V or from 500 to 15 000V measurement with a voltage in steps from 40 to 15 000V non destructive Early break test test stopped at a preset current Break at I limit or Burning calculation of the DAR PI and DD dielectric discharge index quality ratios calculation of the measured resistance referred to a reference temperature m measurement of the capacitance of the circuit tested W measurement of the residual current These megohmmeters contribute to the safety of electrical installations and equipment Their operation is managed by microprocessors that acquire process display and store the measurements They have many advantages such as digital filtering of insulation measurements measurement of the voltage the programming of
47. nger the sampling time can be And the more unstable the measurement the shorter the sampling time must be in order to correctly display variations of the insulation resistance Press the MEM key one last time to record the measurement ji The instrument confirms the storage OK The measurement is recorded with all its supporting information the date the time the measurement mode the duration of the measurement the measurement configuration the test voltage the insulation resistance the capacitance the residual current and possibly the DAR the PI the DD the resistance referred to the reference temperature etc To exit without recording press the 4 key You then return to the last measurement For each new record the instrument proposes the first free memory location that follows the last record It is also possible to record a measurement at a memory location that has already been used The bargraph indicates the quantity of memory used in black the quantity of memory available in white and the quantity of memory needed to store the data of the last measurement made shaded Store Obj Test Date Time Fct 03 0 0202 0201 0102 0101 MEMORY 2011 05 28 2011 05 27 2011 05 27 2011 05 26 2011 05 26 09 04 10 43 10 38 15 04 14 56 The U RAMP and U STEP modes are indicated along with the tests in which samples were recorded to allow subsequent display of the curve The number of
48. nt Maximum Output Current This is the current not to be exceeded in the Break at I limit type of test Break at limit Use the A V keys to set it to between 0 2 and 5mA m The current range l range This function is used to make measurements more rapidly when their order of magnitude is already known Use the A V keys to set its value to Auto or Fix Then choose the current range For example for U 10 000 V R gt 30 GO 200 M2 lt R lt 16 6GQ 10 MQ lt R lt 1GQ 10MQ because Imax 1 mA at 10 000 V The fixed current range remains active for as long as the switch is not turned The RANGE symbol is displayed RANGE BURN FIXED VOLTAGE soov Wulli 2500v Input voltage 10 V AC Frequency 50 0 Hz Input current 24 6 nA Date 2011 05 23 Time 10 31 m Perturbation of the signal Disturbance Level Use the A V keys to set its value from Low to High The DH symbol is then displayed FIXED VOLTAGE soov Wulli 2500v Input voltage 10 V AC Frequency 50 0 Hz Input current 24 6 nA Date 2011 05 23 Time 10 31 Setting to High is recommended when you make measurements in the presence of strong electromagnetic fields at the network frequency for example near high voltage lines If the instrument detects an interfering AC voltage that is too high it automatically switches to High which places an analogue filter on the inputs m Inthe U FIXED and U VAR modes the alarm threshold Use
49. ntial function Rc Kr Rt where Rc insulation resistance referred to 40 C Rt insulation resistance measured at ambient temperature T Kr coefficient defined as follows Kr 1 2 40 TAT where AT temperature difference at which the insulation resistance is halved 4 2 ALARM KEY Press the ALARM key to activate the alarm defined using the CONFIG key see 4 3 or in SET UP see 85 The ALARM symbol is then displayed If the measurement is less than the alarm threshold the instrument so indicates by the blinking of the ALARM symbol on the display unit and the emission of an audible signal C Press the ALARM key again to deactivate the alarm the ALARM symbol disappears from the display unit ALARM 4 3 CONFIG KEY 4 3 1 BEFORE THE MEASUREMENT If the U FIXED or U VAR test voltages have been chosen there are two configuration screens There is only one for the U RAMP and U STEP test voltages Press the CONFIG key CONFIG Manual Stop DD Timed Run m s Timed Run DD CONFIG DAR s s PI m m Total Run Time 3 Manual Stop manual stoppage of the measurement Manual Stop DD manual stoppage of the measurement and calculation of the DD Timed Run m s automatic stoppage of the measurement at the end of the programmed duration Timed Run DD automatic stoppage of the measurement at the end of the programmed duration and calculation of the DD DAR automatic stoppage of the measurement at the end
50. o your PC using the USB cord provided The update of the embedded software depends on its compatibility with the hardware version of the instrument This version is indicated in SET UP see 85 Attention updating the embedded software resets the configuration and causes the loss of the stored data As a precaution save the stored data to a PC before updating the embedded software 10 WARRANTY Except as otherwise stated our warranty is valid for twelve months starting from the date on which the equipment was sold Extract from our General Conditions of Sale provided on request The warranty does not apply in the following cases m Inappropriate use of the equipment or use with incompatible equipment W Modifications made to the equipment without the explicit permission of the manufacturer s technical staff m Work done on the device by a person not approved by the manufacturer m Adaptation to a particular application not anticipated in the definition of the equipment or not indicated in the user s manual Damage caused by shocks falls or floods 11 TO ORDER Megohmimeter CA 60550 siris Eege Ati Ase e eed e kuwa de Va d EV Va Ve ee eed ee P01139705 Megohmmeter C A 6555 casis crede px EI FRE tre EE ed AER Eee E RARE EX Re ERA day sia ERA ER n dus pense ER Sin AA Rie nn DL KE b HA P01139706 Delivered with bag containing m 1 mains power cord 2m long m 1 DataView data transfer software m 1 optical USB cord
51. on Index 21 3 0 DD dielectric discharge Index encre yaka da s ka dad r yan ana vent u dada d herded E ya a ia ark z doa N ada Elya dawe gees 23 3 7 CabaCitanCe measurement ulus u yi anak akla d ne X Sx ERE ESSE R ka Reo RB ctae Xa ERA Ra SEHR AVR ERRE j de s prasku Sa Re n Aa A KERA kak a dR b d e A 25 3 8 Measurement of EL ET Dir CN 25 4 COMPLEMENTARY FUNCTIONS U ll nA KAR KURE RAWA Ru AA nu U U U u UI UQ 26 AA TEMP KOV 3s u ana a ve VURE Wwe VR K bn du K dr vas Va V N ened a ee A ee eee 26 4 2 ALARM KEY si isi H 27 24 3 GONE GARG m a u ey ak 6 27 e MIEAS4CuM X yaya RR RAN 32 EE 32 4 6 FILTER K V u sesecssscecesiazesgaseavedaszecsadesceseuecadssepesuanesyeskevesdsccbaeubag oasiyeasutedensnpaakasazacaieanai cnedpeastbeaasdeteavesdatenscs NEESS 33 2375MELP Key E Er 34 5 CONFIGURATION GEEURR 35 5 1 eieiei Ciel Ee en te Ee WEE 35 Ee ET 36 5 9 EE Ee TE an 36 5 4 Adjustment of the test voltages nier iege re sss KEF ad EA La ER Dk X ERD ERA qhasa HAWA a n Ai A EE car ERA k 37 5 5 Adjustment of the alarm thresholds uu U diee gelya xalan
52. out periodic recharging the battery is probably fully discharged Possible consequences are W Failure of the instrument to switch on as long as the mains cord is not connected W Aloss ofthe instrument s date and time it reverts to 1 January 2010 8 3 3 OPTIMIZE BATTERY CHARGING During charging the temperature of the battery rises substantially especially towards the end A safety device built into the battery checks constantly that the battery temperature does not exceed an acceptable maximum If this maximum is exceeded the charger switches off automatically even if charging is not complete Above 30 C it is not possible to charge the battery fully because the charging will cause overheating 8 3 4 LIFE BETWEEN CHARGES The mean battery life depends on the type of measurement and on how the device is used Test voltage V 500 1 000 2 500 5 000 10 000 15000 Voltmeter How long your device can operate when the battery is fully charged depends on several factors m The consumption of the device which depends on the measurements you make m The capacity of the battery It is greatest when the battery is new and declines as the battery ages Here are a few ways to extend battery life between charges m Use the back lighting only when it is strictly necessary Set the brightness of the back lighting to the lowest level at which you can still read the display unit Program an automatic switching off see SET UP 5 2
53. plication of the test voltage Even if they gradually fade they perturb the measurement at the start for a more or less long time depending on whether the insulation is sound or degraded These ratios therefore complete the absolute insulation value and reliably reflect the condition good or bad of the insulation In addition long term observation of the evolution of these ratios is a way to monitor the ageing of the insulation For example that of a revolving machine or of a long cable The values of DAR and PI are calculated as follows DAR R1 min R 30s 2 values to be noted during a 1 min measurement PI R o min R 1min 2 values to be noted during a 10 min measurement The times of 1 and 10 minutes for the calculation of the PI and the times of 30 seconds and 1 minute for the calculation of the DAR can be modified using the CONFIG key or in SET UP see 5 to adapt to particular applications 3 5 1 MEASUREMENT There are several ways of measuring the DAR and the PI m In manual configuration Press the START STOP button Wait one minute for the DAR or ten minutes for the PI if the default values are used 502 V Set 500V 978 nA START STOP Elapsed Time 00 10 08 ji 499 MO ca A kO 1 MQ GO TQ 10 100 10 100 10 100 10 Press the START STOP button again to stop the measurement START STOP m In automatic configuration preferable Press the CONFIG key CONFIG Use the
54. r by displaying CLEAR MEMORY All other errors require returning of the instrument for repair 7 DATA TRANSFER SOFTWARE DataView the data transfer software supplied with the instrument can be used to export the measurements and to present them in the form of a report Set the switch to any position other than OFF Start by installing the software using the CD The data rate must be 38 400 bauds for the instrument see 85 2 supplied with the instrument and for the PC SET UP Then connect the instrument to the PC using the optical USB cord supplied with the instrument after removing the cover that protects the port in the instrument When in communication with a PC the instrument displays REMOTE and no longer reacts to the user s commands The keys and the rotary switch are inactive except for stopping the instrument OFF setting To use the data transfer software refer to the on line help ADJUSTABLE VOLTAGE 50 V Input voltage 0 1 V AC Frequency 0 2 Hz Input current 11 pA Date 2011 05 24 Time 15 31 Once the data transfer is over you can disconnect the instrument then disconnect the cord The instrument then resumes its normal operation 8 SPECIFICATIONS 8 1 REFERENCE CONDITIONS Temperature 23 3 C R Relative humidity Electric field Magnetic field The intrinsic uncertainty is the error specified for the reference conditions The operating uncertainty includes the intrinsic
55. r the type of test m the power limit for Burning tests a and the current limit for the Break at I Limit tests Maximum output current as a function of the test voltage 1100 1200 1300 5000 10000 15000 If the current is limited in SET UP the values mentioned above that exceed the limit will be lowered m Fixed test voltage Test voltage V 500 1000 2500 5000 10000 15000 Specified 10 999 ka m 1 000 3 999 MO 4 00 39 99 MO 40 0 399 9 MO 400 3 999 GO 4 00 39 99 GO 16 90 10 6 p0 Test voltage V S00 D v gt 1000 gt 2500 gt 5000 Specified 400 999 GO 399 9 GO 00 Noe ro 2 000 3 999 TO 10 00 TO 15 00 TO Resolution 100m9 ia 1060 X 1000 1596 10 pt x 2096 10 pt s 2096 15 pt 30 15 pt Test voltage V 210000 15000 C A 6555 only Specified measurement 4 00 25 00 TO 4 00 29 00 TO range s 2096 10 pt x 2096 10 pt OTS m Variable test voltage Minimum resistance measured 10kQ Maximum resistance measured to be interpolated from the values in the tables of fixed test voltages above The intrinsic uncertainty depends on the test voltage and on the resistance measured It can be interpolated from the tables of fixed test voltages m Measurement of the DC voltage during the insulation test Input impedance 3MQ up to 1 600V and 300MQ thereafter SPETNE meas yey emi 40 0 99 9 100 1
56. re is one for each fixed or adjustable voltage and all of them can be modified The adjustment of the number is independent of the adjustment of the units For a test voltage of 500V the alarm threshold is adjustable from 10kQ to 990kQ For a test voltage of 1 000V the alarm threshold is adjustable from 100kQ to 4TO For a test voltage of 2 500V the alarm threshold is adjustable from 300kO to 10TO For a test voltage of 5 000V the alarm threshold is adjustable from 300kQ to 10TO For a test voltage of 10 000V the alarm threshold is adjustable from 1MQ to 10TQ For a test voltage of 15 000V the alarm threshold is adjustable from 1MQ to 10TQ For the adjustable test voltages the alarm threshold depends on the voltage It is adjustable between two values that depend on the test voltage A further press on the DISPLAY key is used to validate the changes and return to the first SET UP screen 6 MEMORY FUNCTION 6 1 RECORDING OF THE MEASUREMENTS It is possible to record each insulation measurement once it is over It is not possible to record the voltage measurements These results are recorded at addresses identified by an object number OBJ and a test number TEST An object can contain 99 tests An object can therefore represent a machine or an installation on which a certain number of measurements will be made The instrument proposes recording the result at the first available At the end of the measurement press the location in
57. see 84 5 GRAPH Pressing the TEMP key opens the temperature menu see 4 1 Pressing the MEM key records the measurements in memory see 6 1 2 O8 MEM At any time you can press the HELP key for a reminder of the functions of the keys 18 3 4 ERROR INDICATIONS The most common error in the case of an insulation measurement is the presence of a voltage on the terminals The instrument can make the measurement if the peak value of this voltage is less than 0 4U or 1000 Vac maximum Above this value it is necessary to eliminate the voltage and repeat the measurement If an external voltage appears on the terminals during the measurement and its peak value is greater than 1 1U the measurement is broken off and the error is indicated 3 5 DAR DIELECTRIC ABSORPTION RATIO AND PI POLARIZATION INDEX In addition to the quantitative value of the insulation resistance it is very useful to calculate the quality ratios of the insulation the DAR and the PI because they can eliminate the influence of certain parameters likely to invalidate the absolute insulation measurement They also serve to predict the evolution of insulation quality over time The most important of these parameters are m temperature and relative humidity with which insulation resistance varies according to a quasi exponential law m the disturbance currents capacitive charging current dielectric absorption current created by the ap
58. smoothed not the measurements The recorded data therefore remain raw no filter This function is useful in case of high instability of the insulation values displayed but it is also possible to estimate the measurement on the bargraph i FILTER Once the measurement has started if you find that it is perturbed press the FILTER key Start by applying the DF10s filter If that is not enough go to the DF20s filter then to the DF40s filter The larger the time constant the smoother and slower the measurement Successive presses on the FILTER key modify or remove the filter m DF 10 time constant 10 seconds m DF 20 time constant 20 seconds m DF 30 time constant 40 seconds m no filter The filter is calculated as follows Ry Ry R Rya UN If N is set to 20 the time constant of this filter will be approximately 20 seconds DF 20s R I ALARM E A 303 3 MO OBA V 3 244 uA Elapsed Time 00 00 48 ko MO GO TO 10 100 10 100 10 100 10 Selecting digital filtering DF is recommended for measurements of fluctuating high insulation resistance values Such fluctuations may be due to hand effects fluctuating capacitances in the device tested insulation that varies because of conducting dust an ionizing and polarizing effect of this dust etc or again to the presence of an AC voltage superposed on the measurement The FILTER key is active before and during the measurement 4 7 HELP KEY i
59. surement it is also possible to trigger the analogue filter of the measurement Disturbance Level For more details refer to the previous section In the case of a variable test voltage the voltage set is also displayed and can be modified during the measurement RANGE 502 MO 2805 V Set 2300V 4 61 pA Elapsed Time 00 00 12 CONFIG I Range Fix 2 Disturbance Level Low C2Adjustable Voltage 2300 V 4 4 DISPLAY KEY This key is used to browse through the various accessible screens containing all information available before during or after the measurement Depending on the measurement mode and the configuration chosen CONFIG key the screens are different 4 5 GRAPH KEY During the measurement and at the end of each measurement pressing the GRAPH key displays the curve of variation of the insulation resistance versus time Minimum and maximum values C GRAPH P ofthe voltage and the resistance 3 018 GO 00 01 00 and time at the location of the Insulation resistance axis Curve R t Time axis 3 018 GQ 00 01 00 cursor Test voltage axis Curve V t identified by x s This curve is plotted using samples recorded during the measurement The 4 gt keys are used to move along the curve to display the exact values of each sample The minimum and maximum values may be the same if the time scale of the graph is too short In the case of a measurement in U RAMP or U STEP mode this gives
60. surement if the temperature is below the dew point 0 to 45 C 0 to 90 RH m Specified domain of use 0 to 35 C 0 to 7596 RH m Storage without the batteries 40 to 70 C 10 to 9096 RH m Altitude lt 2000m W Degree of pollution 2 8 5 CONSTRUCTION SPECIFICATION m Overall dimensions of the instrument LxWxH 340 x 300 x 200mm m Weight approximately 6 2kg 8 6 Compliance with international standards Electrical safety per IEC 61010 1 IEC 61557 parts 1 and 2 up to 10 kV or VDE 0413 Double insulation IO Degree of pollution 2 Voltage measurement category 1 000V Cat IV Maximum voltage with respect to earth 1 000Vrms Cat IV Maximum voltage between guard terminal G and the terminal 1 000Vac 8 6 1 ELECTROMAGNETIC COMPATIBILITY Emissions and immunity in an industrial environment per IEC 61326 1 8 6 2 MECHANICAL PROTECTIONS IP 65 according to IEC 60529 with the housing closed and IP 54 with the housing open IK 04 according to IEC 50102 8 7 VARIATIONS IN THE DOMAIN OF USE Influence quantity ae 2i Quantity influenced f ES Typical i Battery voltage V lt 1 pt 2 pt eat NEN aa E 3 pt V 0 15 10 G 0 3 10 C 1 pt Temperature MQ GO 0 2 10 C 1 10 C 2 pt U gt 7 5 kV and R lt 10 TO 1 5 10 C 3 10 C 2 pt V 1 2 pt 10 75 HR MQ 10 kO 40 GO 0 2 1 5 pt with t lt 35 C MQ 40 GO 10 TO 0 3 15 5 pt U gt 7 5kVand3TO lt R lt 10TO
61. the Y keys to set the alarm threshold The alarm threshold can also be set in SET UP see 5 5 The ALARM symbol is displayed if the alarm is active ALARM BURN FIXED VOLTAGE soov Wulli 2500v Input voltage 10 V AC Frequency 50 0 Hz Input current 24 6 nA Date 2011 05 23 Time 10 31 m In the U RAMP mode the programming of the ramp Set Ramp Function Use the Y keys to go to Set Ramp Function the instrument displays the voltage ramp values programming screen This programming can also be done in SET UP see S5 4 m Inthe U STEP mode the programming of the step Set Step Function Use the Y keys to go to Set Step Function the instrument displays the voltage step values programming screen This programming can also be done in SET UP see 85 4 4 3 2 DURING THE MEASUREMENT During the measurement the CONFIG key is used to choose the current range automatic default or fixed For more details refer to the previous section Once the measurement has started press the The following screen appears CONFIG key 502 MQ 502 V Set 500V 978 nA Elapsed Time 00 00 12 CONFIG CONFIG 31 Range Auto 2 Disturbance Level Low Use the gt and A V keys to modify the measurement current range Then validate your choice by pressing the CONFIG key again If the range is fixed the RANGE symbol is displayed The choice remains active until the switch is turned CONFIG During the mea
62. thresholds to trigger audible alarms the timer for measurement duration checks the programming of a limitation of the measurement current the plotting of the resistance voltage and current vs time curves and the current vs voltage curve R t U t I t and I U protection of the device by fuse with detection of defective fuse operator safety thanks to the automatic discharging of the test voltage on the tested device at the end of the measurement automatic power save mode of the device to save battery power indication of battery charge condition large graphic display with backlight capability a memory to store the measurements a real time clock and a USB interface data export to a PC using the software provided 2 2 DISPLAY The display unit is a graphic display with a resolution of 320x240 pixels It has built in back lighting which can be controlled by a long press on the key see 81 4 2 2 1 EXAMPLE OF DISPLAY BEFORE THE MEASUREMENT Test with programmed duration NDS Sess The alarm is active The blinking value can be No current limitation modified using the A V keys FIXED VOLTAG programmed 500 V Condition of the batteries Value of the next lower available ae test voltage Type of test voltage Value of the external voltage __ Input voltage Value of the next higher available present on the terminals and its test voltage frequency Frequency Input current Programmed duration
63. uncertainty plus variations of the quantities of influence supply voltage temperature interference etc as defined in standard IEC 61557 8 2 CHARACTERISTICS PER FUNCTION 8 2 1 VOLTAGE m Characteristics Measurement range 100 999V Intrinsic uncertainty 1 1 pt m Input impedance 3MQ 8 2 2 CURRENT Specified measurement 0 000 0 399 nA 0 400 3 999 nA 4 00 39 99nA 40 0 399 9nA 400 nA 3 999 LA range DC Resolution 1 pA 10 pA 100 pA 1 nA Intrinsic 5 5 uncertainty ea gt Specified measurement 4 00 39 99 uA 40 0 399 9 yA 400 HA 3 999 mA 4 00 9 999 mA range DC Intrinsic uncertainty 8 2 3 INSULATION RESISTANCE m Method Voltage current measurement per IEC 61557 2 from 300 to 10 000V and per DIN VDE 0413 Part 1 09 80 m Nominal output voltage 500 1000 2 500 5000 10000 and 15000Vpc for the C A 6555 or adjustable from 40 to 10 000Voc and 15 000Vopc for the C A 6555 Intrinsic uncertainty 1 adjustable from 40 to 10 00Vpc in 10 V steps adjustable from 1000 to 15 000Voc in 100 V steps m Maximum current lt 1mApc from 40 to 999V 5 to 0 5mApc from 1000 to 15000V The user can adjust this current m Maximum acceptable peak AC voltage 0 4 U or 1000 Vac maximum m Short circuit current lt SmApc 5 This current can be limited in SET UP to between 0 2 and 5mA It can also be limited by the maximum output power which is 10W The limit acts whateve
64. ween the various measurements made on a given device Procedure m Make a measurement in U FIXED or U VAR mode m Press the TEMP key TEMPERATURE Air Temperature C Humidity Probe Temperature C C Rc Reference Temperature C AT for R 2 TEMP R measured Rc at G m Use the 4 gt and A V keys to enter the various parameters Air Temperature the ambient temperature optional Humidity the ambient relative humidity optional Probe Temperature the temperature of the device tested If it has not warmed up during the measurement it is equal to the ambient temperature Rc Reference Temperature the temperature to which the measured resistance will be referred AT for R 2 the temperature variation known or estimated sufficient to halve the insulation resistance To facilitate the programming the instrument proposes default values W The instrument then displays the insulation resistance referred to the reference temperature TEMPERATURE DAir Temperature 23 C Humidity 4096 Probe Temperature 23 C Rc Reference Temperature 40 C AT for R 2 10 C R measured 5 00 GQ Rc at 40 C 1 529 GO If coefficient AT for R 2 is not known it can be calculated from a minimum of 3 measurements made on the same device at different temperatures Detail concerning the calculation performed The insulation resistance varies with the measurement temperature This dependence can be approximated by an expone

1000 V

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