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MI 3295 Step Contact Voltage Measuring System

Instrument description 3295 M Meter

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3 Instrument description MI 3295M Meter

3.1 Front panel

Figure 3.1: Front panel

Legend:

1 LCD

LCD display with backlight

2 ESC

Returns to previous menu

3 MEM

Handling with memory

4 Cursor and TEST keys

Cursors Selects test parameters

TEST

Starts / stops measurement

5 BACKLIGHT, CONTRAST Changes backlight level and contrast

6 ON / OFF

Switches the instrument power on or off

The instrument automatically turns off 15 minutes
after the last key was pressed

7,8 Function selector

Selects test function and settings

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Содержание MI 3295

Страница 1: ...Step Contact Voltage Measuring System MI 3295 Instruction manual Version 2 1 1 Code no 20 752 071...

Страница 2: ...on your equipment certifies that it meets requirements of all subjected EU regulations 2017 METREL The trade names Metrel Smartec Eurotest Auto Sequence are trademarks registered in Europe and other c...

Страница 3: ...isplay 15 5 1 1 Battery indication 15 5 1 2 Warnings and messages 15 5 2 Backlight and contrast adjustments 16 5 3 Function selection 16 5 4 Settings 16 5 4 1 Language 17 5 4 2 Help screens 17 5 4 3 I...

Страница 4: ...the Meter 36 8 Data handling 37 8 1 Memory 37 8 1 1 Data structure 37 8 1 2 Storing test results 38 8 1 3 Recalling test results 38 8 1 4 Clearing stored data 39 8 2 Current Logger 41 8 2 1 Clearing t...

Страница 5: ...ES Manager enables uploading structure downloading of results storing of results and making test reports Some measuring system highlights Graphic LCD displays on Meter and Station Autonomous Step Con...

Страница 6: ...lls should only be replaced with the same type as defined on the battery placement label or in this manual Do not use standard alkaline battery cells while power supply adapter is connected otherwise...

Страница 7: ...igure 2 3 Charging indication Before opening battery compartment cover disconnect all measuring accessories connected to the instrument and switch off the instrument Do not charge alkaline battery cel...

Страница 8: ...er charging and incorrect discharging during normal usage of the entire battery pack it results in heating of the battery pack significantly decreased operation time reversed polarity of defective cel...

Страница 9: ...and measuring circuits IEC EN 61010 031 Safety requirements for hand held probe assemblies for electrical measurement and test IEC EN 61010 2 032 Safety requirements for electrical equipment for measu...

Страница 10: ...cklight 2 ESC Returns to previous menu 3 MEM Handling with memory 4 Cursor and TEST keys Cursors Selects test parameters TEST Starts stops measurement 5 BACKLIGHT CONTRAST Changes backlight level and...

Страница 11: ...n port RS232 serial communication port 4 Current clamp inputs Warning Maximum allowed voltage between clamp test terminals is 3 V 5 Test connector Warning Maximal allowed voltage between test terminal...

Страница 12: ...MI 3295 Step Contact Voltage Measuring System Instrument description 3295M Meter 12 Figure 3 4 Battery compartment Legend 1 Serial number label 2 Battery cells size AA...

Страница 13: ...For connection to mains cord 3 Power On Off switch 4 RS232 connector For connection to the Meter 5 C1 H Connection for auxiliary earthing probe 6 S Connection for voltage sense probe 7 ES Connection...

Страница 14: ...10 m black 10mm2 with crocodile clip 1 pc Test lead black 2 x 3 m 1 pc Test lead green 10 m 1 pc Test lead red 50 m 1 pc Connection lead with crocodile clip red 1 m 1 pc Test lead black 1 5 m 1 pc Cr...

Страница 15: ...ery Battery is too weak to guarantee correct result Replace or recharge the battery cells Recharging in progress if power supply adapter is connected Warning If the batteries are removed for more than...

Страница 16: ...Exits without changes 5 3 Function selection For selecting function main menus the FUNCTION SELECTOR shall be used Function selector Selects test measurement function STEP VOLT step voltage test U CON...

Страница 17: ...the instrument Figure 5 5 Example of help screen Keys Cursor LEFT RIGHT Selects next previous help screen ESC Returns to Settings main menu 5 4 3 Initial settings The instrument settings and measurem...

Страница 18: ...lects the item to be changed Cursor UP DOWN Modifies selected item TEST Confirms new setup and exits ESC Returns to Settings main menu 5 4 5 Synchronization Selecting SYNC MI3295S will allow uploading...

Страница 19: ...p and Contact Touch voltage results and Potential results are calculated on base on the set ISET in the Meter After the test the results made with the Meter can be updated with the real generator curr...

Страница 20: ...ms different tests to ensure safety and to prevent from damaging it These safety tests include checking for any external voltage or improper loading of test terminals If a problem is detected an appro...

Страница 21: ...s can be stored 6 3 Help screens Same as in MI 3295M see chapter 5 4 2 Help screens The help screens can be accessed with the HELP key 6 4 Contrast adjustments With the LIGHT key contrast can be adjus...

Страница 22: ...te option TEST Enters selected option ESC Exits back to main function menu 6 6 1 Language Same as in MI 3295M see chapter 5 4 1 Language 6 6 2 Initial settings Selecting this option will allow the use...

Страница 23: ...output can become overloaded by high external earth currents In this case it is recommended to decrease the output power and restart the generator The current stopped flowing abruptly If the stop was...

Страница 24: ...the earth electrode Figure 7 1 shows how fault Step and Contact Touch voltages occur as a result of fault currents flowing through the earthing electrode grid in the ground Fault currents close to po...

Страница 25: ...resistance of the auxiliary probe should be as low as possible in order to inject a high test current The resistance can be decreased by using more probes in parallel or using an auxiliary earthing s...

Страница 26: ...in case of fault current UMeasured measured voltage during the test IFault maximal earth current in case of a fault IGen injected test current Earth resistance For the earthing resistance test a volta...

Страница 27: ...ans that the material at different depths is measured By increasing the distances a a deeper layer of ground material is measured More information about measuring earth resistance can be found in the...

Страница 28: ...Hz mode Iron clamp left and Flex clamps right 7 2 Step voltage Contact Touch voltage and Potential 7 2 1 Injection of test current Before starting the Step voltage Contact Touch voltage and Potential...

Страница 29: ...e Step voltage Contact Touch voltage or Potential measurements it is recommended to synchronize the Meter and the Station The synchronization sets the same date and time in both units Therefore the me...

Страница 30: ...VOLT or U CONTACT TOUCH function Set test parameters limits optional For Step voltage place the test electrodes see chapter 7 1 3 Measurement for more information For Contact Touch voltage place one t...

Страница 31: ...ey to start the measurement Set distance d from main point earthing rod Press the TEST key to measure Potential at set distance Wait until the test result is displayed on the screen Set new distance d...

Страница 32: ...17 Potential gradient example around the building 7 2 5 Synchronization after the test recommended If the Meter and Station were synchronized during the measurements they should be synchronized again...

Страница 33: ...urement screen Test parameters for current measurement Type Current clamp type A1018 A1587 Mode Test mode TRMS 50 Hz 55 Hz 60 Hz Rang Range of A1587 clamp 30 A 300 A 3000 A Ilim A1018 No limit 10 mA 9...

Страница 34: ...EARTH function using the function selector switch Select EARTH RE sub function using the cursor UP DOWN keys Connect C2 E test lead and ES potential lead to main earthing point Connect C1 H test lead...

Страница 35: ...sing the cursor LEFT RIGHT keys Set distance a using the cursor UP DOWN keys Connect C1 H and C2 E test leads as current probes Connect S and ES test leads as potential probes Press the TEST key to pe...

Страница 36: ...ed to the Meter first Connect Meter to the Station with the RS232 cable See Figure 7 11 Set Station to main menu On Meter select EARTH RESULTS in SYNC MI3295S menu and confirm Follow the information o...

Страница 37: ...d describes the identity of the measurement which object and location The measurement field contains information about type and number of measurements that belong to the selected structure element obj...

Страница 38: ...ure 8 2 Save test menu Display information Memory available for storing results Keys in save test menu data structure field Cursor UP DOWN Selects the location element Project Object Test point Cursor...

Страница 39: ...back to data structure field Figure 8 5 Example of recalled measurement result Keys in recall memory menu measurement results are displayed Cursor LEFT RIGHT Displays measurement results stored in se...

Страница 40: ...urements Select DELETE RESULTS in MEMORY menu Figure 8 9 Menu for clearing individual measurement measurement field selected Keys in delete results menu data structure field selected Cursor UP DOWN Se...

Страница 41: ...ore information about the advantages of synchronized measurements The available place in the logger is shown in the right side of the Current Generator screen see Figure 7 9 Once the logger is full it...

Страница 42: ...ccording to detected interface USB interface has priority How to transfer stored data RS232 communication connect a PC COM port to the instrument PS 2 connector using the PS 2 RS232 serial communicati...

Страница 43: ...able components inside the instrument except the battery under rear cover of Meter MI 3295M See chapter 2 2 Battery and charging of MI 3295M 9 1 Fuse replacement and range selection Range selection Fi...

Страница 44: ...over of fuse holder hazardous voltage inside Replace blown fuse with original type only otherwise the instrument may be damaged and or operator s safety impaired Position of a fuse can be seen in Figu...

Страница 45: ...ularly calibrated in order that the technical specification listed in this manual is guaranteed We recommend an annual calibration Only an authorized technical person can do the calibration Please con...

Страница 46: ...n US Um Ifault Igen UC Um Ifault Igen Ifault selectable 1 A 200 kA Input resistance selectable 1 k 1 M 2 k with additional adapter A 1304 Noise cancelation DSP filtering 55 Hz 64 dB rejection of 50 60...

Страница 47: ...0 1 k m Measuring range Resolution Accuracy 0 00 9 99 ft 0 01 ft Calculated value consider accuracy of Resistance to earth function 10 0 99 9 ft 0 1 ft 100 999 ft 1 ft 1 00 9 99 k ft 0 01 k ft 10 0 2...

Страница 48: ...60 Hz mode DSP filtering 64 dB fMODE 5 Hz Measuring refresh rate typical 2 6 s 50 Hz 55Hz and 60 Hz mode typical 1 5 s TRMS mode Limit range I Off 10 mA 9 00 A Automatic range selection yes Note Do n...

Страница 49: ...mps External magnetic field Additional uncertainty Flex clamp A1587 5 A m 15 of reading It is very important that the conductor should be at the center and perpendicular to the measuring head 10 7 Gen...

Страница 50: ...ry 1500 memory locations Communication interface RS232 USB Dimensions w h d 23 cm 10 3 cm 11 5 cm Weight 1 3 kg with batteries Environmental conditions Reference temperature range 10 C 30 C Reference...

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