M I C R O O H M M E T E R Reference Manual IBEKO POWER AB Sweden
2 IBEKO POWER AB Manual Version:. MV.01 IBEKO POWER AB 2003 This Reference Manual is a publication of IBEKO POWER AB, 18 125 Lidingö, Sweden. All rights including translation reserved. Reproduction of any kind, e.g., photocopying, microfilming or storage in electronic data processing systems, requires the explicit consent of IBEKO POWER AB. Reprinting, wholly or in part, is not permitted. This Reference Manual represents the technical status at the time of printing. The product information, specifications, and all technical data contained within this reference manual are not contractually binding. IBEKO POWER AB reserves the right to make changes at any time to the technology and/or configuration without announcement. IBEKO POWER AB is not to be held liable for statements and declarations given in this reference manual. The user is responsible for every application described in this reference manual and its results. IBEKO POWER AB explicitly exonerates itself from all liability for mistakes in this manual.
3 Contents Contents Contents........................................... 3 1 Introduction..........................................4 2 Safety Instructions.................................... 5 3 Designated Use......................................7 4 Functionality........................................ 7 5 Decription........................................... 8 6 Getting Started..................................... 12 7 Error Messages......................................17 8 Technical Data......................................20 9 Accessories........................................ 22 10 Manufacturer Contact Information..................... 22
4 Introduction 1 Introduction 1.1 About this Manual This reference manual contains helpful instructions on how to use in a safe, proper and efficient way. Following these instructions can help you to avoid dangerous situations, repair costs and other miss happenings due to incorrect operation. Furthermore it ensures the reliability and life cycle of your. must be used in observance of all existing safety requirements/ regulations from national/local standards for accident prevention and environmental protection. Reading the reference manual alone does not release the user from the duty of complying with all national and international safety regulations relevant for working with.
5 Safety Instructions 2 Safety Instructions Before operating, please carefully read the following safety instructions. It is not recommended that the will be used (or even turned on) without the understanding of this manual. should only be operated by trained and authorized personnel. Rules for Use should only be used when in a technically fit condition. Its use should be in accordance with the safety regulations for the actual working site and application. Always be aware of the dangers of high voltages and currents associated with this equipment and its environment. Pay attention to the information provided in the operations manual. is intended exclusively for the application areas specified in Designated Use. The manufacturer and distributors are not liable for damage resulting from unintended usage. The user alone assumes all responsibility and risk. The instructions provided in this reference manual are considered part of the rules governing proper usage. Do not open. Orderly Practices and Procedures The reference manual should always be available on the site where the is used. Before using, all personnel (even personnel who only occasionally, or less frequent, work with ) assigned to should read the operations manual. Do not undertake any modifications, extensions, or adaptations to the. Cleaning To clean, use a cloth dampened with isopropanol alcohol or water.
6 Safety Instructions Operator Qualifications Testing with should only be carried out by authorized and qualified personnel. Personnel receiving training, instruction, direction or education on the should remain under the constant supervision of an experienced operator while working with the test set and the test object. Safe Operation Procedures Hazardous voltages of up to 400V can occur inside. Therefore, only qualified and authorized personnel at the factory is permitted to open. Do not insert objects (e.g., screwdrivers, etc.) into the ventilation slots. Before putting into operation, check the test set for visible damages. Do not operate under wet or moist conditions (condensation). Do not operate when explosive gas or vapors are present. The serial interface of should only have external devices connected that meet the requirements for SELV equipment according to EN 60950 or IEC 60950. When setting up, make sure that the air slots of the test set remain unobstructed. If is opened by the customer, all guarantees are invalidated. If seems to be functioning improperly, please call the IBEKO POWER AB (refer to section Manufacturer Contact Information ). Do not use without the extra protective ground (PE) cable set connected. Power Supply Supply only from a power outlet that is equipped with protective ground (PE). Instead of supplying from phase neutral (L1-N, A-N), it may also be supplied from phase phase (e.g., L1-L2; A-B). However, the voltage must not exceed 240 V AC, please refer to section 8.1.
7 Designated Use, Functionality 3 Designated Use The microohm meter is designed for measuring contact resistances of noninductive test objects used in the electric power industry or similar branches. It is employed for resistance measurement during manufacturing, commissioning and testing of power circuit breakers interrupters bar installation cable splices welded joints grounding Any other use of the than the ones mentioned above is to be considered improper and will not only invalidate all customer warranty claims but also exempt the manufacturer from its liability for repair or exchange. 4 Functionality The generates a filtered (true) DC current and outputs it in an automatically regulated current ramp. The current increases with a constant slope from zero up to a set maximum value. When the current has reached its maximum, measures the resistance of the test object. After measuring the output current ramps back down to zero with a constant slope. By sloping the current up and down, magnetic transients are virtually eliminated. During measurements the high DC current will heat up the test set. To prevent from overheating, duty cycles apply. The duty cycles depend on the used test current, please refer to section Duty Cycles.
8 Description 5 Description 5.1 Front Panel Components Display UP/DOWN buttons to select a menu, define a test current and set a memory position ESC button to return to the Curr menu to set new test parameters LEFT/RIGHT buttons to navigate in the active menu ENTER button to confirm the defined test current and memory position
9 Description STOP button Press to stop a measurement or to acknowledge the alarm buzzer. Ω button Press to start a measurement. Test current and memory position must be selected beforehand. green LED Lights continuously when is turned on. Flashes when a measurement can be started. Flashes alternately with the red LED during a measurement. red LED Lights continuously in case of operational error. Flashes alternately with the green LED during a measurement.
10 Description 5.2 Rear Panel Components Connector for mains power supply Power switch I In this position, is connected to the mains power supply 0 In this position, is separated from the mains power supply with both poles Equipotential connector. For protection against parasitic currents or voltages, always connect 's equipotential connector to protective ground (PE). Use only the cable set listed in the section ''Standard Scope of Supply''. Ventilation For safety reasons, always establish this connection as the first one before you do any other connections, and separate this connection as the very last one.
11 Description 5.3 Setting s Language To set s language, use the UP/DOWN buttons to select the Language menu. Figure 5-1: The Language menu Move the cursor to the buttom line using the LEFT/RI GHT buttons, and select the language of your choice. Pressing ENTER or ESC returns you to the Curr men. 5.4 Setting s Time and Date To set s internal time and date, use the UP/DOWN buttons to select the Time menu. Figure 5-2: The Time menu showing s internal time and date Move the cursor to the position of your choice using the LEFT/RIGHT buttons, and change the value with the UP/DOWN buttons. The changes are saved instantly. Pressing ENTER or ESC returns you to the Curr men.
12 Getting Started 6 Getting Started 6.1 Connecting a Test Object to Before you connect a test object to, make sure that: the test object is disconnected or separated from its circuit in accordance with the national safety regulations the test object is properly grounded to protective earth (PE) itself is properly grounded. To do so, connect the grounding screw on the back of s to PE using a grounding cable. With turned off, connect to the test object (R X ) in such a way that the measuring cables from the "Voltage Sense" sockets are attached as close as possible to R X, and in between the current feeding cables. That way, resistance of both cables and clamps is almost completely excluded from the resistance measurement. Figure 6-1: Connecting a test object to
13 Getting Started 6.2 Setting the Measurement Parameters Turn on with the power switch on the back of the test set. The display shows the Curr menu. Figure 6-2: The Curr menu Test current Memory position Menu name Date Time In the Curr menu, define a test current for the measurement. To do so, use the RI GHT button to move to the test current position (here 200A), and set the value of your choice by means of the UP/DOWN buttons. The memory position (here m:30) denotes a position the measurement data is stored during the measurement. It can be recalled later by selecting that position s number. Once a measurement in finished, the memory position is automatically switched over to the next position. 6.3 Measuring with Before a measurement can be started, both test current and memory position need to be defined using the Curr menu. Once these parameters are defined, press ENTER to change to the Test menu. Figure 6-3: The Test menu before the measurement The Test menu displays the test current and memory position defined. If one of these values has to be changed, press ESC to return to the Curr menu. The flashing green LED indicates that is now ready to start the measurement. Press the Ω button to run a test.
14 Getting Started During the measurement During the measurement, both the green and the red LEDs flash alternately. The display shows a graphical representation of the output current that ramps from 0A to the defined maximum value (here 200A). Figure 6-4: The Test menu during the measurement with the output current ramped from 0A up to maximum (here 200A) Once the current ramp reaches its maximum value, measures the current through the test object and the voltage at the test object for 1s, calculates the resistance from these values, and saves the data at the present memory position. Afterwards, ramps down the output current from the maximum value to 0A, and increases the memory position by 1. When 0A is reached, the measurement is finished and the green LED lights up. Note: To stop the measurement prematurely, press the STOP button at any time during the measurement. The current will immediately drop to 0A
15 Getting Started 6.4 Viewing the Measurement Results Once a measurement is finished, automatically changes to the Result view to display the measurement results. The test current value displayed here is the maximum test current reached. Note: If the defined test current could not be reached, this could be due to a too high contact resistance of the test object and/or of the measuring cables. Figure 6-5: The Result menu showing the measurement results Max. test current reached Memory position that holds the results Measured resistance of test object Now there are two choices: 1. Starting a new measurement with a different current value: press the ESC button to change to the Curr menu set a new current value and another memory position confirm your entries by pressing the ENTER button. start the test by pressing the Ω button. 2. Starting a new measurement with ths same current value: press the ENTER button to change to the Test menu the current value remains the same as in the previous measurement, the memory position increases by one. start the test by pressing the Ω button.
16 Getting Started 6.5 Viewing Results of Previous Measurements stores up to 100 measurement results. They can be viewed using the Memory menu at memory positions 0... 99. Selecting a memory position on the Memory menu displays the current fed into the test object the memory position of these results the test object s measured resistance the date or the time of this particular measurement. To view the creation date of the measurement rather than the time, position the cursor on the displayed time (here 11:02), and use the RIGHT button to toggle between date and time. Figure 6-6: The Mem menu showing the previously saved measurement results of memory position 30 6.6 Duty Cycles During measurements, generates a high DC current that heats up the test set. To prevent from overheating, certain duty cycles apply depending on the used test current. Table 6-1: Cooling time between measurements Test current Cooling time between first 4 measurements Cooling time after 4 measurements 100 A 0 sec. 0 sec. 200 A 3 sec. 10 sec. 300 A 5 sec. 20 sec. 400 A 10 sec. 40 sec. 500 A 25 sec. 80 sec. A built-in control prevents these cooling times from being skipped. If you try to start a measurement within the cooling period, the display shows "Wait" and a timer counting down. After the cooling period has elapsed, start the test using the set measurement parameters by pressing the Ω button. Cooling of is supported by a built-in fan that is automatically activated every time a measurement is started from the Test menu. It continues running 5 minutes after the test is finished.
17 Error Messages 7 Error Messages Any operational error is indicated by a red LED and accompanied by an alarm. Furthermore, the display indicates an error status message. To stop the alarm buzzer and keep the status message on the display, press the STOP button. To acknowledge the alarm buzzer and return to the Curr menu, press the ESC button. 7.1 Error Message "Voltage Sense" Figure 7-1: Interruption of a "Voltage Sense" measuring cable If one of the "Voltage Sense" measuring cables to the test object is interrupted and/or disconnected on either the test set s or the test object s side, the error message "Voltage sense" is displayed. Figure 7-2: Error message "Voltage sense"
18 Error Messages 7.2 Error Message "Open Connection" Figure 7-3: Interruption of the current feeding cables If one of s current feeding cables ("+" or " -") to the test object is interrupted and/or disconnected on either the test set s or the test object s side, the error message "Open Connection" is displayed. Figure 7-4: Error message "Open Connection"
19 Error Messages 7.3 Error Message "I x R > 2,5V" This message is displayed if during the measurement the voltage at the test object exceeds 2.5V. In this case reduce the test current and repeat the measurement. Figure 7-5: Error message "I x R > 2.5V" 7.4 Error Message "Overheat" This message is displayed when s operating temperature rises too high due to a high ambient temperature (refer to section 8.3) or, despite the duty cycle time control (refer to section 6.6), too many high current measurements were performed in too short of a time. Figure 7-6: Error message "Overheat" In this case, wait for the test set to cool down and repeat the measurement. 7.5 Error Message "Malfunction" If this message is shown on the display, or if cannot be operated anymore at all, a serious internal error occurred. Figure 7-7: Error message "Malfunction" Please do not open by yourself. Contact the IBEKO POWER AB (refer to section Manufacturer Contact Information ).
20 Technical Data 8 Technical Data 8.1 Mains Power Supply - Connection according to IEC/EN60320-1; UL498, CSA 22.2 - Voltage single phase 110 240Vac, +10% -15% - Power consumption 3400 W at 230V 1800 W at 115V - Frequency 50/60 Hz 8.2 Output data - Test current 10A 500A - Measuring range/ 1 99,9 µω / 0,1 µω Resolution 100 999 µω / 1 µω 1 9,99 mω / 10µΩ 10,0 m 99,9 mω / 100µΩ 100 200 mµω / 1mΩ - Accuracy ± 0,25% + 1 LSD - Output power 2200W at 400A/230V Mains Supply 1200W at 400A/115V Mains Supply 8.3 Climate - Operating temperature -10 o - +50 o C / 14 o - +122 o F - Storage temperature -25 o - +70 o C / -13 o - +158 o F - Humidity 5 95% relative humidity, non-condensing 8.4 Dimensions and Weight - Dimensions 198 x 255 x 370 mm (W x H x D) without handle - Weight 8 kg / 17,5 lbs 8.5 Safety Standards - European standards EN 61010-1 - International standards IEC 61010-1 UL 3111-1 CAN/CSA-C22.2 No 1010.1-92
21 Technical Data 8.6 Electromagnetic Compatibility (EMC) CE conformity EMC standard 89/336/EEC Emission EN 50081-2, EN 61000-3-2/3 Interference Immunity EN 50082-2 8.7 RS232 Interface is equipped with an RS232 serial interface to connect to an external computer. Figure 8-1: RS232 serial interface connector on front panel to connect to an external computer 6 nc not connected 7 nc not connected 8 nc not connected 9 nc not connected Housing = shield 1 nc not connected 2 TXD (out) Transmit Data 3 RXD (in) Receive Data 4 DTR (out) Data Terminal Ready 5 GND Ground
22 Accessories 9 Accessories Article Article number with standard accessories 500100 Calibration shunt 100 µω (600A / 60mV) 500366 Transport bags 500171 Transport case 500170 Voltage sense cable set 2 x 5m, 2.5mm², 500605 Voltage sense cable set 2 x 10m, 2.5mm², 500610 Current extension cable 1 x 5m, 35mm², cable resistance 3,0 mω Current extension cable 1 x 5m, 50mm², cable resistance 2,3mΩ Current extension cable 1 x 5m, 70mm², cable resistance 1,8mΩ Current extension cable 1 x 9m, 50mm², cable resistance 3,3mΩ Current extension cable 1 x 9m, 70mm², cable resistance 2,3mΩ Current cable set 2 x 5m, 35mm², resistance of both cables and clips: 6,1mΩ Current cable set 2 x 5m, 50mm², resistance of both cables and clips: 4,6mΩ Current cable set 2 x 5m, 70mm², resistance of both cables and clips: 3,6mΩ 500553 500555 500557 500595 500597 500453 500455 500457 10 Manufacturer Contact Information IBEKO POWER AB Box 1346, 181 25 Lidingö, Sweden Fax: + 46 8 73 17 799 E-Mail: support@dv-power.com Website: http://www.dv-power.com