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Megohmmeter

Model 24508

Page 24

Technical data

General informa

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tion

Pr

eparations for

use

Contr

ols and con

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nections

Manual operation

of the unit

Contr

olling the

unit r

emotely

Maintenance and customer service

Manual operation

of the unit

CURRENT MEASUREMENT

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Содержание 24508

Страница 1: ... and customer service Megohmmeter Model 24508 Manufacturer burster praezisionsmesstechnik gmbh co kg Talstraße 1 5 P O Box 1432 76593 Gernsbach 76587 Gernsbach Germany Germany Tel 049 07224 6450 Fax 049 07224 64588 E Mail info burster com www burster com 3045 024508EN 5999 071527 2020 burster präzisionsmesstechnik gmbh co kg All rights reserved Valid from 2020 07 06 OPERATION MANUAL ...

Страница 2: ...nufacturer s prior written approval Components devices and measured value sensors made by burster praezisionsmesstechnik hereinafter referred to as product are the results of targeted development and meticulous research As of the date of delivery burster provides a warranty for the proper condition and functioning of these products covering material and production defects for the period specified ...

Страница 3: ...gohmmeter Model 24508 Page 3 Technical data General informa tion Preparations for use Controls and con nections Manual operation of the unit Controlling the unit remotely Maintenance and customer service ...

Страница 4: ...gohmmeter Model 24508 Page 4 Technical data General informa tion Preparations for use Controls and con nections Manual operation of the unit Controlling the unit remotely Maintenance and customer service ...

Страница 5: ...1 Button functions 17 3 2 Description of connectors 18 4 Manual operation 19 4 1 General instructions 19 4 2 Setting the measurement time 20 4 3 Threshold switch 20 4 4 Measurement start 20 4 5 Error messages 21 4 6 Example of a measurement in autorange mode 21 4 7 Overview of operation 23 5 Remote control 27 5 1 Controlling the unit remotley 27 5 2 Pin connections for the RS232 interface 27 5 3 C...

Страница 6: ...gohmmeter Model 24508 Page 6 Technical data General informa tion Preparations for use Controls and con nections Manual operation of the unit Controlling the unit remotely Maintenance and customer service ...

Страница 7: ... remotely Maintenance and customer service This equipment complies with the following product specifications Safety CEI 1010 1 EN 61010 1 Class I protection Operating voltage 230 V cat II EMC Electromagnetic compatibility Interference emission EN 55011 Group 1 Class B Interference immunity EN 50082 1 CEI 1000 4 2 Level 3 CEI 1000 4 3 Level 2 CEI 1000 4 4 Level 2 ...

Страница 8: ...gohmmeter Model 24508 Page 8 Technical data General informa tion Preparations for use Controls and con nections Manual operation of the unit Controlling the unit remotely Maintenance and customer service ...

Страница 9: ...er The various operations must be performed with care and attention by the user A mistake can have catastrophic results for safety or result in severe damage to the equipment n The protection provided by this equipment may be reduced if it is not used in ac cordance with the instructions in this manual or if the user has made technical changes without authorization n This equipment has class Ι pro...

Страница 10: ...ct under test to the megohm meter n During insulation resistance testing never touch the test probes or the object under test high voltage n Measuring the insulation resistance on a capacitive object can be dangerous for the user A built in relay ensures that the capacitive discharge of the element under test has a time constant of less than 0 1 s for 1 µF It is forbidden to touch the object befor...

Страница 11: ...g range can be selected manually or automatically Fast serial measurements can be performed using the integral threshold switch If the reading lies below an adjustable limit the threshold monitor trips and enables an isolated relay output The megohmmeter is suitable for both laboratory and industrial use 1 2 Description The digital megohmmeter type 24508 is a microprocessor controlled instru ment ...

Страница 12: ...voltage a measuring unit covering 8 measuring ranges and one alphanumeric display A microprocessor controls the various functions such as setup menus voltage ranges measuring ranges computations RS232 interface It compares the measured value with a target value set by the user and signals if the measurement lies above or below this value via an indicator lamp on the front panel and using a changeo...

Страница 13: ...any within 72 hours The packaging should be retained for examination by a representative of the manufacturer and or the delivery company The megohmmeter type 24508 should be shipped only in its original packaging or in packaging capable of providing an equivalent degree of protection 2 2 Using the equipment for the first time Check that the correct supply voltage 230 V 50 Hz is available Connect t...

Страница 14: ...e fuse Remove the power lead from the grounding outlet Only use original fuses 5 x 20 mm 0 16 AF for 230 V 2 5 Power supply and signal cable connectors DIGITAL I 0 Preparations for use 9 pin min sub D fe male connector View towards socket 1 NC 2 RXD 3 TXD 4 DTR 5 Digital GND grounded inter nally 6 NC 7 NC 8 CTS 9 NC Connector shell PE protective ground potential Mating connector Type 9900 V209 RS2...

Страница 15: ...al informa tion Preparations for use Controls and con nections Manual operation of the unit Controlling the unit remotely Maintenance and customer service Preparations for use Rear panel of unit Comparator Relay output and external Start Stop Mains Fuse ...

Страница 16: ...SO 9000pp The equipment should be recalibrated after a period of about one year Calibration must only be performed at the manufacturer s premises 2 8 Storage The unit can be stored at temperatures between 20 C and 70 C If condensation has formed on the unit make sure that the unit is completely dry including inside before switching it on No further measures are required before use after storage 2 ...

Страница 17: ... Confirming the menu selection 2 START STOP measurement in test menu 3 Ground PE protective earth equipment grounding conductor 4 Guard connection for tests on screened cables 5 Measurement input X 6 Test voltage U 7 Test voltage indicator lights up when the test voltage is applied across the connectors 8 Threshold indicator lights up when the measured value lies above the set limit 9 10 Cursor fu...

Страница 18: ...vice 3 2 Description of connectors Test voltage Red BNC socket 1 Plastic insulation 2 Ground protective ground 3 Voltage output Measurement input Black BNC socket 1 Plastic insulation 2 Guard functional ground 3 Measurement input Guard connector Blue ø 4 mm safety socket for ø 4 mm safety bunch plug Ground socket Green Yellow ø 4 mm safety socket for ø 4 mm safety bunch plug Controls and con necti...

Страница 19: ...ary See Maintenance and warranty chapter Connect the megohmmeter to the object under test according to the type of measurement to be made the chapter General information on the meg ohmmeter in the appendix contains more details on this Move the cursor in the menu Resistance Current into the required position and then confirm your selection with button 2 Proceed to select the required settings in t...

Страница 20: ...nterface at the end of the measurement time 4 3 Threshold switch If the measured value exceeds the threshold i e the test object is OK the relay closes and the R LIMIT LED on the front panel comes on An isolated changeover contact is provided for external processing max 48 V 1 A The measured value display and the test assessment are saved until a new mea surement is initiated 4 4 Starting a measur...

Страница 21: ...is greater than the set measuring range for manual range selection Rx Rmaxi if the reading from the object under test is greater than the maximum measur ing range for automatic range selection only Error Utest if there is a short circuit or the test current is too large 4 6 Example of performing a measurement in Auto range mode with preset threshold 1 First select the RESISTANCE operating mode and...

Страница 22: ...T V indicator lamp shows that the voltage is applied to the test object A few seconds later its resistance value is displayed If this value is greater than the preset threshold the R LIMIT indicator lamp signals that the relay has switched Pressing any button during the test aborts this test The principle for manual measurements is the same In this case the range is selected in the MANUAL MODE men...

Страница 23: ...ons Manual operation of the unit Controlling the unit remotely Maintenance and customer service Manual operation of the unit 4 7 Overview of operation After switching on the unit it jumps directly to the test mode last selected If the RS232 data transfer lead is connected the unit jumps directly into SLAVE MODE ...

Страница 24: ...e 24 Technical data General informa tion Preparations for use Controls and con nections Manual operation of the unit Controlling the unit remotely Maintenance and customer service Manual operation of the unit CURRENT MEASUREMENT ...

Страница 25: ...age 25 Technical data General informa tion Preparations for use Controls and con nections Manual operation of the unit Controlling the unit remotely Maintenance and customer service Manual operation of the unit RS232 INTERFACE ...

Страница 26: ...26 Technical data General informa tion Preparations for use Controls and con nections Manual operation of the unit Controlling the unit remotely Maintenance and customer service RESISTANCE MEA SUREMENT Manual operation of the unit ...

Страница 27: ...MENU When being controlled via the RS232 the unit must be in the RS232 menu SLAVE MODE and the special RS232 cable must be connected Afterpoweronyoumustfirstchoosemenu RS232INTERFACE andconfirmwith the ENTER key below the display The device is now in the SLAVE MODE As long as the connection pin 4 9 exists the device knows also after power off that the SLAVE MODE was chosen After the disconnection ...

Страница 28: ... 1 Ue 45V 2 Ue 100V 3 Ue 250V 4 Ue 500V Delimiter between parameters or CR if last parameter Ohmmeter function Mxx yy xx Number of measurements prior to data transfer 3 255 Data delimiter yy Measuring range 0 Automatic selection of measuring range 1 to 8 Manual selection of measuring range G1 G8 16 Automatic selection of measuring range with external activation of test 17 to 24 Manual selection of...

Страница 29: ...d 40 Receive error new instruction during the measurement 80 Receive error or incorrect command code sent CR End of message symbol Start measurement if the code contains errors wait for new command string Type 24508 transfer of measured value at end of measurement time Second transmission xx yyyyyEzzzCR xx 8 bit flag Hex code 00 Measured value Threshold insulation resistance error 01 Measured valu...

Страница 30: ...ten Ende Zeichen CR CHR 13 werden durch das Zeichen am Ende des Befehls unterdrueckt Durch den Befehl CHR 13 wird jedoch wieder das als letztes Zeichen notwendige CR Ende Zeichen mitgesendet Geraeteinstellung Slave Mode Previous menue Stand 27 08 1999 AG QSI DIM Lesen 20 Laenge des Antwort festlegen DIM Grenzwert 10 Voltage 4 Messfunktion 8 Endezeichen 2 CLS Bildschirm loeschen Kommentar auf Bilds...

Страница 31: ...rator Tastatureingabe IF Komparator x OR Komparator X THEN GOTO Ende2 Pro grammende IF Komparator THEN GOTO defaultGW Kein Zeichen ELSE Grenzwert S LEFT Komparator 2 RIGHT Komparator J 2 END IF IF VAL Komparator 100 THEN Grenzwert S10 09 Test kleiner 100 Ohm IF VAL Komparator 1E 16 THEN Grenzwert S10 09 Test groess er 10 Teraohm defaultGW keine Eingabe erfolgt PRINT Messspannungs Eingabe oder Vorg...

Страница 32: ...ion M08 00 8 Messzyklen Automatische Messbereichswahl Messfunktion M10 16 10 Messzyklen Automatische MB 00 mit externem Trigger 16 Messfunktion I12 19 12 Messzyklen Manuelle Messbereichswahl 3 J und externem Trigger 16 Endezeichen CHR 13 Befehlsende Zeichen Parameter ueber die Schnittstelle senden PRINT 1 Grenzwert Voltage Messfunktion Endezeichen Schnittstelle PRINT PRINT Ausgabestring naechste Z...

Страница 33: ... Neue Zeile PRINT Typ 24508 Daten Lesen Wenn Timeout programmiert dann minimale Messzeit warten Antwort Lesen xx yyyyy Ezzz CHR 13 xx 8 Bit Flag in Hex 00 Messwert Grenzwert Isolation Fehler 01 Messwert Grenzwert ok 10 Messwert Messbereich 20 Messwert Messbereich 30 Problem mit Umess Kurzschluss 21 Kombination 20 01 Datenseparator yyyyy Messwert 16 bits 0 65000 E Exponent zzz Exponent ueber 8 bit ...

Страница 34: ... Programm Abschluss Ende1 Einsprung bei Fehler GOTO Programmschleife Ende2 CLOSE 1 Schnittstelle COM 1 schliessen END Programmende Unterprogramm einlesen einlesen REM Unterprogramm aktuellen Input von Typ 24508 einlesen I REM Variable loeschen Lesen REM String loeschen WHILE I CHR 13 REM einlesen bis CR I INPUT 1 1 REM 1 Zeichen abholen Lesen Lesen I REM Zeichen zusammensetzen WEND REM alle Zeiche...

Страница 35: ... Line 5 Between the character E and the following characters is a little break in the ms range During this time it is possible that the interface goes in timeout If the string is cut at E the timeout must be longer Hint Timer routines in PC programmes are defined according the application of the timers in ms or in s Is the timeout defined to 10 and this are 10 ms and not 10 s so the string can be ...

Страница 36: ...pending the measurement range and the internal filter you get an engage of the display This is the reason of the different analy sis result 1 When the measurement value engage the first displayed value is used for the analysis of the limit flag 2 The second and further values are transferred via the RS232 Interface 3 This is the reason why you can get different analysis result between the limit re...

Страница 37: ...queries Only then can the manufacturer find out the technical status of the equipment and hence provide help quickly The serial number is shown on the rating plate If the megohmmeter needs to be returned for repairs please note the following requirements for packing and shipping If you have a problem with the unit please attach a note to the case summarizing the fault If you also include a name de...

Страница 38: ...ter garantees reliable operation of the device for a period of 24 months followings its delivery Repairs required within this period will be performed free of charge This guarantee does not cover damage arising from improper handling of the device Furthermore the manufacturer cannot be held liable for any type of conse quential damage Technical data are subject to change without notice 6 4 Cleanin...

Страница 39: ...st of ease Resistance measuring range 50 kΩ 10 TΩ with 8 ranges Accuracy 50 kΩ 1 TΩ 2 5 rdg 1 digit 1 TΩ 10 TΩ 10 rdg 1 digit Current measuring range 5 pA 10 mA with 8 ranges Accuracy 500 pA 10 mA 2 5 rdg 1 digit 10 pA 500 pA 10 rdg 1 digit Test voltage 45 V 100 V 250 V 500 V Meas time up to 999 s Max current in the measurement circuit 5 mA Range selection manuel or auto range or via RS232 interfa...

Страница 40: ...ons Manual operation of the unit Controlling the unit remotely Maintenance and customer service Technical data Operation temperature 0 C 45 C Storage temperature 20 C 70 C Operation voltage 230 V 10 50 Hz Device safety According EN 61010 1 Power consumption 10 VA Housing W x H x D 255 x 125 x 270 mm Weight 3 kg ...

Страница 41: ... interfer ence or even unwanted leakage currents flowing in parts other than the object under test cable insulation holders etc Using screened cables and a reference potential a potential very close in value to the test voltage it is possible to reduce these interfer ence effects and to perform cable screening tests when required The most common test situation The test voltage connected to ground ...

Страница 42: ...istances R1 and R2 are not included in the measurement Only the resistance Rx wire 1 to screening is mea sured Since Utest UG 0 the current through R1 is also zero The current through R2 comes solely from the voltage source UG So only the value of Rx is mea sured EXAMPLE 2 Depending upon the connection wiring the RESIS TOMAT 24508 makes it possible to determinate the surface or the volume resistan...

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