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MI 3250 MicroOhm 10A

Communication

6 Communication

The instrument can communicate with the HVLink PRO PC software. The following
action is supported:



Saved results can be downloaded and stored to a PC.

A special communication program on the PC automatically identifies the instrument and
enables data transfer between the instrument and the PC.
There are two communication interfaces available on the instrument: USB or RS 232.

How to transfer stored data:



RS 232 communication: connect a PC COM port to the instrument RS 232
terminal using the RS 232 serial communication cable.



USB communication: connect a PC USB port to the instrument USB connector
using the USB interface cable.



Switch on the PC and the instrument.



Set the desired communication port RS 232 or USB.



Run the HVLink PRO PC software.



The instrument is prepared to download data to the PC.

Note:



USB drivers should be installed on PC before using the USB interface. Refer to
USB installation instructions available on installation CD.

Содержание MI 3250

Страница 1: ...MicroOhm 10A MI 3250 Instruction manual Version 1 1 2 Code no 20 751 893...

Страница 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 2011 METREL No part o...

Страница 3: ...2 Measurement control window 17 3 4 3 Message window 17 3 4 4 Battery and time indication 18 3 4 5 Backlight operation 18 4 Main menu 19 4 1 Instrument Main menu 19 4 2 Memory Menu 20 4 2 1 Saving res...

Страница 4: ...MI 3250 MicroOhm 10A Table of contents 4 7 2 Periodic calibration 35 7 3 Service 35 8 Technical specifications 36 8 1 Resistance measurement 36 8 2 Measurement parameters 36 8 3 General data 37...

Страница 5: ...MicroOhm 10A meter Resistance measurement Four wire Kelvin method High Resolution measurement 24 Bit ADC Auto or Manual Range Wide measuring range 0 1 2 k Adjustable test current 1 mA 10 A Temperatur...

Страница 6: ...ck while dealing with hazardous voltages Do not use the instrument in supply systems with voltages higher than 300 V Service intervention or adjustment is only allowed to be carried out by competent a...

Страница 7: ...ect automatic discharge may not be done immediately High voltage can appear on test terminals when measuring inductive object Do not connect test terminals to external voltage higher than 300 V AC or...

Страница 8: ...he instrument automatically recognizes the connected power supply and begins charging Symbols Indication of battery charging Figure 2 3 Charging indication When connected to an installation the instru...

Страница 9: ...to restore the batteries to their normal capacity Notes The charger in the instrument is a pack cell charger This means that the battery cells are connected in series during the charging The battery c...

Страница 10: ...atory use Part 1 General requirements EN 61010 031 Safety requirements for hand held probe assemblies for electrical measurement and test Note Immunity to radiated RF fields Field strength 10V m Modul...

Страница 11: ...ent power on or off The instrument automatically turns off 15 minutes after the last key was pressed 3 MEM Store recall clear tests in memory of instrument 4 SELECT To enter set up mode for the select...

Страница 12: ...ion of mains supply cable Figure 3 3 Communication terminals USB and RS232 Figure 3 3 Battery cover Figure 3 4 3 2 1 Test leads connector Figure 3 2 Test leads connector Legend 1 C1 Current terminals...

Страница 13: ...Legend 1 RS232 connector Communication with PC RS232 port Communication with printer 2 USB connector Communication with PC USB 1 1 port 3 Mains connector Mains supply of the instrument and battery ch...

Страница 14: ...ct inserted batteries Warnings When connected to an installation the instruments battery compartment can contain hazardous voltage inside Disconnect all test leads remove the power supply cable and sw...

Страница 15: ...home page http www metrel si Figure 3 6 Standard set of the instrument Instrument MI 3250 MicroOhm 10A Current test leads with crocodile clip 2 5 m 2 5 mm2 2 pcs Kelvin Current test leads 2 5 m 2 5 mm...

Страница 16: ...asurement campaign this result is refreshed every few seconds After finishing measurement result is hold on screen until new measurement is started R shows resistance in the negative direction During...

Страница 17: ...It is possible to select one of following ranges 2 m 20 m 200 m 2 20 200 2 k Current allows user to select proper current for resistance measurement It is possible to select one of following currents...

Страница 18: ...4 4 Battery and time indication The indication indicates the charge condition of battery and charger connection Battery capacity indication Low battery Battery is too weak to guarantee correct result...

Страница 19: ...available Measurement Memory Menu Settings Menu and Help Menu Figure 4 1 Instrument Main menu Keys Select one of the following menu items Measurement See chapter 5 2 Memory Menu Memory management see...

Страница 20: ...re 4 2 Memory Menu 4 2 1 Saving results After the completion of a test the results and parameters are ready for storing By pressing the MEM key the user can enter storing menu Figure 4 3 Storing Menu...

Страница 21: ...call Menu Figure 4 5 Recalled result screen Keys in Recall menu Selects one of the following items Object No of results Decrees or increase the parameter SELECT Recalls result in selected location ESC...

Страница 22: ...Object No of results Decrees or increase the parameter SELECT Enters Delete confirmation screen ESC Returns to the Memory Menu Keys in Delete confirmation screen SELECT Deletes result s in selected l...

Страница 23: ...settings Temperature Compensation temperature compensation settings Set Limits limit values selection Instrument Info basic instrument information SELECT Confirms selection ESC Returns to the Main me...

Страница 24: ...nu ESC Returns to the Settings menu without changes Warning If the batteries are removed of the instrument the time and date will be lost 4 3 4 Set Contrast In this menu the contrast of the display ca...

Страница 25: ...the parameter SELECT Enters Coefficient menu ESC Returns to the Settings menu changes are stored automatically Keys in Coefficient menu Select the parameter to be changed Decrees or increase the para...

Страница 26: ...hows the compensated value Figure 4 13 Compensated result example This table shows the temperature coefficient of various materials at 20 C 68 F Material Symbol Temperature coefficient C ppm Resistivi...

Страница 27: ...it is within the given limits Figure 4 14 Setup limits menu Keys Select the parameter to be changed Decrees or increase the parameter ESC Returns to the Settings menu changes are stored automatically...

Страница 28: ...The Help menu contains schematic diagrams for illustrating how to properly connect the instrument to the various test objects Keys in help menu Selects next previous help screen ESC Returns to the Set...

Страница 29: ...outside the P1 and P2 probes 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 err...

Страница 30: ...to Range Off On Range 2 m 20 m 200 m 2 20 200 2 k Current 10 A 1 A 100 mA 10 mA 1 mA Test circuits for Resistance measurement Figure 5 3 Measurement of Resistance Resistance measurement procedure Sele...

Страница 31: ...ined Single measurement I t plot t I I I ADC ADC t u t Test Start Figure 5 5 Single Mode Note The Single Mode can be primarily used for measuring Ralays Switches Connectors Bus bars Power distribution...

Страница 32: ...EMF elimination and started a single measurement every time the P1 P2 C1 and C2 are connected to the test object The main result displayed on the display is an average of the last bidirectional measur...

Страница 33: ...r testing purpose can flow this energy requirement must be met 2 2 1 I L W The range and current output is user defined Inductive measurement I t plot t I ADC t u t Test I Start Stop tc td Figure 5 8...

Страница 34: ...n the instrument USB or RS 232 How to transfer stored data RS 232 communication connect a PC COM port to the instrument RS 232 terminal using the RS 232 serial communication cable USB communication co...

Страница 35: ...nt use a soft cloth 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...

Страница 36: ...mode Test method 4 wire measurement Note All data regarding accuracy is given for nominal reference environment condition and forward and reverse measurements Inductive mode will introduce an undefine...

Страница 37: ...al warnings yes Display 320 x 240 dots matrix display with backlight Reference conditions Reference temperature range 25 C 5 C Reference humidity range 40 RH 70 RH Operation conditions Working tempera...

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