METREL MicroOhm 2A MI 3242 Instruction Manual Download Page 2

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Slovenia
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(European Union) concerning safety and electromagnetic compatibility regulations

© 2012 METREL

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Summary of Contents for MicroOhm 2A MI 3242

Page 1: ...MicroOhm 2A MI 3242 Instruction manual Version 1 0 Code no 20 752 011...

Page 2: ...rel metrel si Mark on your equipment certifies that this equipment meets the requirements of the EU European Union concerning safety and electromagnetic compatibility regulations 2012 METREL No part o...

Page 3: ...6 3 5 4 Backlight and contrast adjustments 17 4 Instrument operation 18 4 1 Function selection 18 5 Settings menu 19 5 1 Selection language 19 5 2 Initial settings 20 5 3 Limits settings 20 5 4 Memory...

Page 4: ...urements 34 9 Maintenance 37 9 1 Cleaning 37 9 2 Periodic calibration 37 9 3 Service 37 10 Technical specifications 38 10 1 Resistance measurement 38 10 2 Measurement parameters 39 10 3 Voltage and fr...

Page 5: ...stance measurement Four wire Kelvin method High Resolution 24 Bit ADC Wide measuring range 1 199 9 Adjustable test current 10 mA 2 A Hi Lo limits Automatic thermal EMF elimination Noise rejection 50 6...

Page 6: ...the instrument or for the equipment under test Do not use the instrument or any of the accessories if any damage is noticed Consider all generally known precautions in order to avoid risk of electric...

Page 7: ...ive object automatic discharge may not be done immediately Do not connect test terminals to external voltage higher than 600 V AC or DC in order not to damage the test instrument Notes related to meas...

Page 8: ...ry lifetime Figure 2 2 Power supply socket polarity The instrument automatically recognizes the connected power supply adapter and begins charging Symbols Indication of battery charging Figure 2 3 Cha...

Page 9: ...rge cycle at least 2 4 times Four cycles are recommended in order to restore the batteries to their normal capacity Notes The charger in the instrument is a pack cell charger This means that the batte...

Page 10: ...EN 61010 2 030 Safety requirements for electrical equipment for measurement control and laboratory use Part 2 030 Particular requirements for testing and measuring circuits EN 61010 031 Safety require...

Page 11: ...DOWN Modifies selected parameter 7 MEM Store recall tests in memory of instrument 8 11 Function selector Selects test function 9 Backlight Contrast Changes backlight level and contrast Switches the i...

Page 12: ...on of external charger 4 USB connector Communication with PC USB 1 1 port 5 PS 2 connector Communication with printer Communication with PC RS 232 port Warnings Maximum allowed voltage between any tes...

Page 13: ...Inserts for side belt 2 Battery compartment cover 3 Fixing screw for battery compartment cover 4 Back side information label 5 Holder for inclined position of the instrument Figure 3 4 Battery compar...

Page 14: ...nd options or contact your distributor or see the METREL home page http www metrel si Figure 3 5 Standard set of the instrument Instrument MI 3242 MicroOhm 2A Test lead 2 5 m 1 pcs black red Crocodile...

Page 15: ...y indication Low battery Battery is too weak to guarantee correct result Replace or recharge the battery cells Recharging in progress if power supply adapter is connected Time indication hh mm Warning...

Page 16: ...Measurement result is out of defined high limit Measurement result is out of defined low limit 3 5 3 Help screens HELP Opens help screen Help menus are available in all functions The Help menu contain...

Page 17: ...ght intensity level Keep pressed for 1 s Locks high intensity backlight level until power is turned off or the key is pressed again Keep pressed for 2 s Bargraph for LCD contrast adjustment is display...

Page 18: ...tance measurement VOLTAGE TRMS Voltage and frequency measurement SETTINGS General instrument settings UP DOWN Selects sub function in selected measurement function TAB Selects the test parameter to be...

Page 19: ...y settings LIMITS SETTINGS limit values selection MEMORY to recall or clear stored results SET DATE TIME date and time INSTRUMENT INFO basic instrument information TEST Confirms selection FUNCTION SEL...

Page 20: ...rns to Main menu without changes 5 3 Limits settings With High and Low limit the user is allowed to set limit resistance values Measured resistance is compared against those limits Result is validated...

Page 21: ...an be recalled or deleted in this menu Figure 5 6 Memory menu Keys UP DOWN Selects option TEST Enters selected option FUNCTION SELECTOR Returns to Main menu without changes See chapter 7 Data handling...

Page 22: ...Instrument info In this menu the following instrument data is shown instrument type model number firmware and hardware version serial number calibration date Figure 5 8 Instrument info menu Keys FUNC...

Page 23: ...tside the P1 and P2 leads The Voltage drop across the Rx is measured across P1 and P2 and these should be placed exactly at the points to be measured Note about poor connection Most measurement errors...

Page 24: ...ects the field to be changed Modifies selected field TEST Start the resistance measurement Test circuits for Resistance measurement Figure 6 3 Resistance measurement connection Resistance measurement...

Page 25: ...de makes a single bidirectional measurement The instrument will measure resistance in both directions thermal EMF elimination The main result displayed on the display is an average 2 R R R Single meas...

Page 26: ...on and repeating the measurements until the TEST key will be pressed The main result displayed on the display is an average of the last bidirectional measurement 2 R R R The measurement is started and...

Page 27: ...d on the display is an average of the last bidirectional measurement 2 R R R To make another measurement simply break and remake contact with the test sample Automatic measurement I t plot Figure 6 7...

Page 28: ...W Inductive measurement I t plot t I ADC t u t Test I Start Stop tc td Figure 6 8 Inductive Mode tc charging time depends on the size of the inductor td discharging time Note The Inductive Mode can be...

Page 29: ...VOLTAGE TRMS can be stored Test circuit for voltage measurement Figure 6 9 Voltage TRMS connection Voltage TRMS procedure Select the VOLTAGE TRMS function Insert the test lead connector in to the inst...

Page 30: ...instrument s memory place is divided into 3 levels each containing 199 locations The number of measurements that can be stored into one location is not limited Figure 7 1 Data structure and measuremen...

Page 31: ...results Keys in save test menu data structure field TAB Selects the location element Object Loc1 Loc2 UP DOWN Selects number of selected location element 1 to 199 MEM Saves test results to the selecte...

Page 32: ...Selects number of selected location element 1 to 199 MEM Enters measurements field TEST FUNCTION SELECTOR Exits back to Main menu Keys in recall memory menu measurements field selected UP DOWN Select...

Page 33: ...EMORY in MEMORY menu A warning will be displayed Figure 7 6 Clear all memory Keys in clear all memory menu TAB Selects YES or NO TEST Confirms clearing memory if YES is selected Exits back without cha...

Page 34: ...es MEM Enters measurements field for deleting individual measurements Keys in dialog for confirmation to clear results in selected location TEST Deletes all results in selected location UP DOWN TAB ME...

Page 35: ...selected measurement TAB Returns to structure field FUNCTION SELECTOR Exits back to Main menu without changes Keys in dialog for confirmation to clear selected result s TEST Deletes selected measureme...

Page 36: ...e communication mode according to the detected interface USB interface has priority How to transfer stored data RS 232 communication connect a PC COM port to the instrument PS 2 connector using the PS...

Page 37: ...loth slightly moistened with soapy water or alcohol Then leave the instrument to dry totally before use Warnings Do not use liquids based on petrol or hydrocarbons Do not spill cleaning liquid over th...

Page 38: ...d DC Test duration 1 s single mode Test method 4 wire measurement Note All data regarding accuracy is given for nominal reference environment condition and forward and reverse measurements Inductive m...

Page 39: ...99 9 Table 10 2 Measurement parameters 10 3 Voltage and frequency 10 3 1 Voltage Measuring range V Resolution V Accuracy 0 0 49 9 0 1 50 550 1 2 of reading 2 digits Result type True r m s trms Nominal...

Page 40: ...atrix display with backlight Dimensions w h d 14 cm 8 cm 23 cm Weight 0 8 kg without battery cells and accessories Reference conditions Reference temperature range 25 C 5 C Reference humidity range 40...

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