METREL MI 2893 Manual
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METREL MI 2893 Manual

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Power Master XT / Power Master / Master Q4
MI 2893 / MI 2892 / MI 2885
(HW: 9.0)
Instruction manual
Version 1.4.8 Code No. 20 753 179

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Summary of Contents for METREL MI 2893

  • Page 1 Power Master XT / Power Master / Master Q4 MI 2893 / MI 2892 / MI 2885 (HW: 9.0) Instruction manual Version 1.4.8 Code No. 20 753 179...
  • Page 2 Mark on your equipment certifies that it meets requirements of all subjected EU regulations. Hereby, Metrel d.d. declares that the MI 2893, MI 2892, MI 2885 is in compliance with subjected EU directive. The full text of the EU declaration of conformity is available at the https://www.metrel.si/DoC.

  • Page 3: Table Of Contents

    MI 2893 / MI 2892 / MI 2885 Table of contents Introduction ..........................14 1.1 Main Features ......................... 15 1.2 Safety considerations ......................16 1.3 Applicable standards ....................... 17 1.4 Abbreviations .......................... 18 Description ..........................28 2.1 Front panel ..........................28 2.2 Connector panel ........................
  • Page 4 MI 2893 / MI 2892 / MI 2885 Table of contents 3.12.2 Trend ..........................70 3.13 Signalling ..........................71 3.13.1 Meter ..........................71 3.13.2 Trend ..........................72 3.13.3 Table ..........................73 3.14 General Recorder........................74 3.15 Waveform/Inrush recorder ...................... 77 3.15.1...
  • Page 5 Short interruptions of the supply voltage............... 212 5.2.11 Long interruptions of the supply voltage................ 212 5.2.12 MI 2893/MI 2892/MI 2885 recorder setting for EN 50160 survey ......... 212 Technical specifications ......................214 6.1 General specifications ......................214 6.2 Measurements ........................214 6.2.1...
  • Page 6 MI 2893 / MI 2892 / MI 2885 Table of contents 6.2.2 Phase Voltages ........................216 6.2.3 Line voltages ........................216 6.2.4 Current ..........................218 6.2.5 Frequency ..........................221 6.2.6 Flickers ..........................221 6.2.7 Transients ..........................221 6.2.8 Combined power ......................... 222 6.2.9...
  • Page 7 MI 2893 / MI 2892 / MI 2885 Table of contents Table 1: MI 2893/MI 2892/MI 2885 standard accessories ................. 30 Table 2: Instrument status bar description....................32 Table 3: Shortcut Keys and other Function keys ..................33 Table 4: Instrument Main menu ......................... 35 Table 5: Keys in Main menu ........................
  • Page 8 MI 2893 / MI 2892 / MI 2885 Table of contents Table 52: Keys in Signalling (TREND) screen ....................72 Table 53: Instrument screen symbols and abbreviations ................73 Table 54: Keys in Signalling (TABLE) screen ....................74 Table 55: General recorder settings description and screen symbols ............75 Table 56: Keys in General recorder setup screen ..................
  • Page 9 MI 2893 / MI 2892 / MI 2885 Table of contents Table 104: Description of RVC setup ......................122 Table 105: Keys in RVC setup screen ......................122 Table 106: Description of Measuring Methods setup ................123 Table 107: Keys in Measuring Methods setup screen ................124 Table 108: Description of Transient setup ....................
  • Page 10 MI 2893 / MI 2892 / MI 2885 Table of contents List of Figures: Figure 1: Power Master XT instrument ....................... 14 Figure 2: Front plates and marking labels ....................15 Figure 3: Front panel ........................... 28 Figure 4:Top connector panel ........................29 Figure 5: Side connector panel ........................
  • Page 11 Figure 63: Transient recorder setup screen – MI 2893 ................85 Figure 64: Transient recorder setup screen – MI 2892/MI 2885 ..............87 Figure 65: Transient recorder capture screen (waiting phase/recording) – MI 2893 ........ 89 Figure 66: Transient recorder capture screen (waiting phase/recording) – MI 2892/MI 2885 ....90 Figure 67: Captured transient recorder screen ..................
  • Page 12 Figure 136: PowerView v3.0 remote connection settings form ............... 161 Figure 137: PowerView v3.0 remote connection monitor ............... 162 Figure 138: PowerView connection to LAN and Metrel Server established (Steps 1 & 2) ....... 163 Figure 139: Remote instrument connection to Metrel Server established (Step 3) ........ 164 Figure 140: Remote instrument connection to PowerView v3.0 established (Step 4) ......
  • Page 13 MI 2893 / MI 2892 / MI 2885 Table of contents Figure 150: IEEE 1459 phase power measurement organisation (phase) ..........181 Figure 151: IEEE 1459 phase power measurement organisation (totals)..........182 Figure 152: Vector representation of total power calculus ..............187 Figure 153: Arithmetic representation of total power calculus ...............

  • Page 14: Introduction

    Product differentiation: MI 2893/2892/2885 sharing same measuring hardware and firmware platform. MI 2893 – Class A Power Quality Instrument with additional transient measuring board with sampling period 1 MHz MI 2892 - Class A Power Quality Instrument with transient measurement on measuring board with...

  • Page 15: Main Features

    Main Features Figure 2: Front plates and marking labels 1.1 Main Features  Full compliance with power quality standard IEC 61000-4-30 Class A (MI 2893/MI 2892)  Full compliance with power quality standard IEC 61000-4-30 Class S (MI 2885) ...

  • Page 16: Safety Considerations

    Instrument remote access over internet connection. 1.2 Safety considerations To ensure operator safety while using the MI 2893/MI 2892/MI 2885 instruments and to minimize the risk of damage to the instrument, please note the following general warnings: The instrument has been designed to ensure maximum operator safety. Usage in a way...

  • Page 17: Applicable Standards

    Do not remove microSD memory card while instrument is recording or reading data. Record damage and card failure can occur. 1.3 Applicable standards The MI 2893/MI 2892/MI 2885 are designed and tested in accordance with the following standards: Electromagnetic compatibility (EMC) EN 61326-1: 2021 Electrical equipment for measurement, control and laboratory –...

  • Page 18: Abbreviations

    MI 2893 / MI 2892 / MI 2885 Abbreviations Part 4-15: Testing and measurement techniques – Flicker meter – Functional and design specifications Electricity metering equipment (a.c.) - Particular requirements IEC 62053-21: 2020 - Part 21: Static meters for active energy (classes 1 and 2) Electricity metering equipment (a.c.) - Particular requirements...
  • Page 19 MI 2893 / MI 2892 / MI 2885 Abbreviations Recorded total arithmetic fundamental power factor. Minus sign indicates generated power  and plus sign indicates consumed DPFa DPFa DPFa totcap- totind totind+ power. Suffix ind/cap represents DPFa DPFa totind- totcap+ ...
  • Page 20 MI 2893 / MI 2892 / MI 2885 Abbreviations Total effective harmonics distortion power. See 5.1.5 section: Total nonfundamental power measurements for definition. Phase voltage distortion power, including Dᴠp (phase p voltage distortion power). See 5.1.5 section: Modern Power measurement Dᴠ...
  • Page 21 MI 2893 / MI 2892 / MI 2885 Abbreviations current RMS inter-harmonic component including I (phase p; RMS current inter-harmonic component) and I (neutral n RMS current inter-harmonic component). See 5.1.8 for definition Nominal current. Current of clamp-on current sensor for 1 Vrms at output.
  • Page 22 MI 2893 / MI 2892 / MI 2885 Abbreviations Recorded positive sequence of total active fundamental power.  Minus sign indicates generated and plus sign indicates positive sequence of consumed power. See 5.1.5 for definitions.  Instantaneous phase active harmonic power, including (phase p ...
  • Page 23 MI 2893 / MI 2892 / MI 2885 Abbreviations Recorded total arithmetic combined (fundamental and nonfundamental) power factor. Minus sign indicates generated  totind totcap totind power and plus sign indicates  consumed power. Suffix ind/cap totcap totcap totind represents inductive/capacitive character.
  • Page 24 MI 2893 / MI 2892 / MI 2885 Abbreviations Photovoltaic inverter Apparent Power AC negative acinv- Phase long term flicker (2 hours), including P (phase p to phase g ltpg long term voltage flicker) and P (phase p to neutral long-term voltage flicker).
  • Page 25 MI 2893 / MI 2892 / MI 2885 Abbreviations and plus sign indicates consumed combined nonactive power. This  totcap parameter is recorded separately for generated and consumed nonactive power.  Instantaneous fundamental reactive phase power including (phase p reactive phase power). Minus sign indicates generated and ...
  • Page 26 MI 2893 / MI 2892 / MI 2885 Abbreviations Combined (fundamental and nonfundamental) total effective apparent power. See 5.1.5 for definition. Combined (fundamental and nonfundamental) total vector apparent power. See 5.1.6 for definition. Phase fundamental apparent power, including Sfund (phase p Sfund fundamental apparent power).
  • Page 27 MI 2893 / MI 2892 / MI 2885 Abbreviations voltage RMS harmonic component including U (phase p to phase g voltage n RMS harmonic component) and U (phase p to neutral voltage n RMS harmonic component). See 5.1.8 for definition.

  • Page 28: Description

    MI 2893 / MI 2892 / MI 2885 Description 2 Description 2.1 Front panel Figure 3: Front panel Front panel layout: Colour TFT display, 4.3-inch, 480 x 272 pixels. 1. LCD Function keys. 2. F1 – F4 Moves cursor and select parameters.

  • Page 29: Connector Panel

    MI 2893 / MI 2892 / MI 2885 Connector panel 2.2 Connector panel Warnings! Use safety test leads only! Max. permissible nominal voltage between voltage input terminals and ground is 1000 V Max. short-term voltage of external power supply adapter is 14 V!

  • Page 30: Bottom View

    Ethernet cable 12 V / 3 A Power supply adapter NiMH rechargeable battery, type HR 6 (AA) Professional protective waterproof case (A 1685) (MI 2893/MI 2892) Soft carrying bag (MI 2885) Compact disc (CD) with PowerView v3.0 and manuals 2.4.2 Optional accessories...

  • Page 31: Operating The Instrument

    MI 2893 / MI 2892 / MI 2885 Operating the instrument 3 Operating the instrument This section describes how to operate the instrument. The instrument front panel consists of a colour LCD display and keypad. Measured data and instrument status are shown on the display. Basic display symbols and keys description is shown on figure below.

  • Page 32: Instrument Status Bar

    MI 2893 / MI 2892 / MI 2885 Instrument status bar 3.1 Instrument status bar Instrument’s status bar is placed on the top of the screen. It indicates different instrument states. Icon descriptions are shown on table below. Figure 9: Instrument status bar Table 2: Instrument status bar description Indicates battery charge level.

  • Page 33: Instrument Keys

    MI 2893 / MI 2892 / MI 2885 Instrument keys E-Meter recorder is active, E-Meter accuracy test in progress. Alarm detected, recording in progress Event detected, recording in progress Inrush detected, recording in progress RVC detected, recording in progress Signalling detected, recording in progress Transient detected, recording in progress Memory list recall.

  • Page 34: Instrument Memory (Microsd Card)

    Additionally, cursor keys are used for zooming graphs and moving graph cursors. 3.3 Instrument memory (microSD card) MI 2893/MI 2892/MI 2885 use microSD card for storing records. Prior instrument use, microSD card should be formatted to a single partition FAT32 file system and inserted into the instrument, as shown on figure below.

  • Page 35: Instrument Submenus

    MI 2893 / MI 2892 / MI 2885 Instrument Main Menu Figure 11: “MAIN MENU” Table 4: Instrument Main menu MEASUREMENT submenu. Provide access to various instrument measurement screens RECORDER submenu. Provide access to instrument recorders configuration and storage. MEASUREMENT SETUP submenu. Provide access to the measurement settings.

  • Page 36: Figure 12: Measurements Submenu

    MI 2893 / MI 2892 / MI 2885 Instrument Main Menu Figure 12: Measurements submenu Figure 13: Recorders submenu (MI 2893) Figure 14: Recorders submenu (MI 2892/MI 2885)) Figure 15: Measurement setup submenu...

  • Page 37: U, I, F

    MI 2893 / MI 2892 / MI 2885 U, I, f Figure 16: General setup submenu Table 6: Keys in submenus Selects function within each submenu. Enters selected function. ENTER Returns to the “MAIN MENU”. 3.5 U, I, f Voltage, current and frequency parameters can be observed in the “U, I, f” screens. Measurement results can be viewed in a tabular (METER) or a graphical form (SCOPE, TREND).

  • Page 38: Figure 18: U, I, F Meter Summary Table Screens

    MI 2893 / MI 2892 / MI 2885 U, I, f Figure 18: U, I, f meter summary table screens In those screens on-line voltage and current measurements are shown. Descriptions of symbols and abbreviations used in this menu are shown in table below.

  • Page 39: Scope

    MI 2893 / MI 2892 / MI 2885 U, I, f Table 8: Keys in Meter screens Holds measurement on display. Hold clock time will be displayed in the HOLD right top corner. Runs held measurement. RESET Resets MAX and MIN values (U...

  • Page 40: Figure 21: Voltage And Current Waveform (Single Mode)

    MI 2893 / MI 2892 / MI 2885 U, I, f Figure 21: Voltage and current waveform (single Figure 22: Voltage and current waveform (dual mode) mode) Table 9: Instrument screen symbols and abbreviations U1, U2, U3, Un True effective value of phase voltage: U...

  • Page 41: Trend

    MI 2893 / MI 2892 / MI 2885 U, I, f TREND Switches to TREND view (available only during recording). Selects which waveform to zoom (only in U/I or U+I). ENTER Sets vertical zoom. Sets horizontal zoom. Triggers Waveform snapshot.

  • Page 42: Figure 27: Trends Of All Currents

    MI 2893 / MI 2892 / MI 2885 U, I, f Figure 27: Trends of all currents Figure 28: Frequency trend Table 11: Instrument screen symbols and abbreviations U1, U2, U3, Un, Maximal ( ), average ( ) and minimal ( ) value of phase RMS voltage U...
  • Page 43 MI 2893 / MI 2892 / MI 2885 METER Switches to METER view. SCOPE Switches to SCOPE view. TREND Switches to TREND view. Moves cursor and selects time interval (IP) for observation. Returns to the “MEASUREMENTS” submenu.

  • Page 44: Power

    3.14 for instructions how to start recorder. In order to fully understand meanings of particular power parameter see sections 5.1.5. Note: MI 2893/MI 2892/MI 2885 always save data according IEEE 1459 and data presentation could be also selected under PowerView.

  • Page 45: Figure 32: Detailed Power Measurements At Phase L1

    MI 2893 / MI 2892 / MI 2885 Power Figure 32: Detailed power measurements at Figure 33: Detailed total power measurements phase L1 Description of symbols and abbreviations used in POWER (METER) screens are shown in table below. Table 13: Instrument screen symbols and abbreviations (see 5.1.5 for details) – instantaneous values...
  • Page 46 MI 2893 / MI 2892 / MI 2885 Power  Positive sequence of total reactive fundamental power (  Positive sequence of total apparent fundamental power ( DPF+ Positive sequence power factor (fundamental, total) Combined (fundamental and nonfundamental) total effective apparent power (Se Sɴ...

  • Page 47: Trend

    MI 2893 / MI 2892 / MI 2885 Power Shows measurement results for TOTAL power measurements. 1 2 3  METER Switches to METER view. TREND Switches to TREND view (available only during recording). Triggers Waveform snapshot. Returns to the “MEASUREMENTS” submenu.
  • Page 48 MI 2893 / MI 2892 / MI 2885 Power View: Fundamental power Maximal ( ), average ( ) and minimal ( ) value of fundamental apparent S1, S2, S3, S+ power (Sfund , Sfund , Sfund ) for time interval (IP) selected by cursor.
  • Page 49 MI 2893 / MI 2892 / MI 2885 Power Selects which measurement should instrument represent on graph:  Consumed or Generated Measurements related to consumed (suffix: +) or generated power (suffix: -).  Combined, Fundamental or Nonfundamental Measurement related to fundamental power, nonfundamental power or combined.

  • Page 50: Energy

    MI 2893 / MI 2892 / MI 2885 Energy Shows power parameters for phases L1, L2 and L3 on the same  1 2 3 graph. Shows Total power parameters. 1 2 3  METER Switches to METER view. TREND Switches to TREND view (available only during recording).

  • Page 51: Figure 36: Energy Counters Screen (General Recorder Is Not Running)

    MI 2893 / MI 2892 / MI 2885 Energy Figure 36: Energy counters screen (General Recorder is not running) Table 17: Instrument screen symbols and abbreviations Consumed (+) phase (Ep , Ep , Ep ) or total (Ep ) active energy...

  • Page 52: Trend

    MI 2893 / MI 2892 / MI 2885 Energy 3.7.2 Trend TREND view is available only during active recording (see section 3.14 for instructions how to start GENERAL RECORDER). Figure 37: Energy trend screen Table 19: Instrument screen symbols and abbreviations...

  • Page 53: Efficiency

    MI 2893 / MI 2892 / MI 2885 Energy 3.7.3 Efficiency EFFICIENCY view is available only during active recording (see section 3.14 for instructions how to start GENERAL RECORDER). Figure 38: Energy efficiency screen Table 21: Instrument screen symbols and abbreviations...
  • Page 54 MI 2893 / MI 2892 / MI 2885 Energy Phase nonfundamental apparent power (Sɴ Sɴ Sɴ Sn avg Total effective nonfundamental apparent power (Seɴ). Sen avg Shown nonfundamental apparent power is averaged over chosen time interval (key: F2)  TOT – shows total average (for complete record) of nonfundamental apparent power ...

  • Page 55: Harmonics / Inter-Harmonics

    MI 2893 / MI 2892 / MI 2885 Harmonics / inter-harmonics METER Switches to METER view. TREND Switches to TREND view. Switches to EFFICIENCY view. Returns to the “MEASUREMENTS” submenu. 3.8 Harmonics / inter-harmonics Harmonics presents voltage and current signals as a sum of sinusoids of power frequency and its integer multiples.
  • Page 56 MI 2893 / MI 2892 / MI 2885 Harmonics / inter-harmonics RMS voltage / current value Total voltage / current harmonic distortion THD and THD in % of fundamental voltage / current harmonic or in RMS V, A. k-factor (unit-less) indicates the amount of harmonics that load generate Voltage or current DC component in % of fundamental voltage / current harmonic or in RMS V, A.

  • Page 57: Histogram (Bar)

    MI 2893 / MI 2892 / MI 2885 Harmonics / inter-harmonics Switches to BAR view. Switches to AVG (average) view (available only during recording). TREND Switches to TREND view (available only during recording). Shifts through harmonic / interharmonic components. Triggers Waveform snapshot.

  • Page 58: Harmonics Average Histogram (Avg Bar)

    MI 2893 / MI 2892 / MI 2885 Harmonics / inter-harmonics Switch’s view between harmonics and inter-harmonics. Keys in VIEW window: VIEW Selects option. Confirms selected option. ENTER Exits selection window without change. Selects between single phases and neutral channel harmonics / inter- harmonics bars.

  • Page 59: Figure 42: Harmonics Average Histogram Screen

    MI 2893 / MI 2892 / MI 2885 Harmonics / inter-harmonics Figure 42: Harmonics average histogram screen Description of symbols and abbreviations used in AVG screens are shown in table below. Table 27: Instrument screen symbols and abbreviations Ux h01 … h50...

  • Page 60: Trend

    MI 2893 / MI 2892 / MI 2885 Harmonics / inter-harmonics Shows harmonics / inter-harmonics components for phases L31. 12 23 Switches to METER view. METER Switches to BAR view. Switches to AVG (average) view (available only during recording). TREND Switches to TREND view (available only during recording).
  • Page 61 MI 2893 / MI 2892 / MI 2885 Harmonics / inter-harmonics Ih01…Ih50 Interval maximal ( ) and average ( )value of selected n-th current harmonic / inter-harmonic component for selected phase Iih01…Ih50 Table 30: Keys in Harmonics / inter-harmonics (TREND) screens Switches between harmonics or inter-harmonics view.

  • Page 62: Flickers

    MI 2893 / MI 2892 / MI 2885 Flickers 3.9 Flickers Flickers measure the human perception of the effect of amplitude modulation on the mains voltage powering a light bulb. In Flickers menu instrument shows measured flicker parameters. Results can be seen in a tabular (METER) or a graphical form (TREND) - which is active only while GENERAL RECORDER is active.

  • Page 63: Trend

    MI 2893 / MI 2892 / MI 2885 Flickers 3.9.2 Trend During active recording TREND view is available (see section 3.14 for instructions how to start recording). Flicker parameters can be observed by cycling function key F4 (METER -TREND). Note that Flicker meter recording intervals are determinate by standard IEC 61000-4-15.

  • Page 64: Phase Diagram

    MI 2893 / MI 2892 / MI 2885 Phase Diagram Selects between the following options: Shows 10 min short term flicker P Plt Pstmin Shows long term flicker P Pstmin Pstmin Shows 1 min short term flicker P Pst Plt...

  • Page 65: Unbalance Diagram

    MI 2893 / MI 2892 / MI 2885 Phase Diagram Figure 46: Phase diagram screen Table 35: Instrument screen symbols and abbreviations Fundamental voltages Ufund , Ufund , Ufund with relative phase angle to Ufund U1, U2, U3 Fundamental voltages Ufund...

  • Page 66: Unbalance Trend

    MI 2893 / MI 2892 / MI 2885 Phase Diagram Table 37: Instrument screen symbols and abbreviations Zero sequence voltage component U Zero sequence current component I Positive sequence voltage component U Positive sequence current component I Negative sequence voltage component U...

  • Page 67: Temperature

    3.11 Temperature MI 2893/MI 2892/MI 2885 instruments are capable of measuring and recording temperature with Temperature probe A 1354. Temperature is expressed in both units, Celsius and Fahrenheit degrees. See following sections for instructions how to start recording. In order to learn how to set up neutral clamp...

  • Page 68: Meter

    MI 2893 / MI 2892 / MI 2885 Temperature 3.11.1 Meter Figure 49: Temperature meter screen Table 41: Instrument screen symbols and abbreviations Current temperature in Celsius degrees Current temperature in Fahrenheit degrees Table 42: Keys in Temperature meter screen Holds measurement on display.

  • Page 69: Under Deviation And Over Deviation

    MI 2893 / MI 2892 / MI 2885 Under deviation and over deviation Maximal ( ), average ( ) and minimal ( ) temperature value for last recorded time interval (IP) Table 44: Keys in Temperature trend screens Shows temperature in Celsius degrees.

  • Page 70: Trend

    MI 2893 / MI 2892 / MI 2885 Under deviation and over deviation Holds measurement on display. Hold clock time will be displayed in the HOLD right top corner. Runs held measurement. Selects between trending various parameters  Shows under/over deviations measurements for all phase voltages Δ...

  • Page 71: Signalling

    MI 2893 / MI 2892 / MI 2885 Signalling Selects between the following options: Under Shows under deviation trends Over Over Shows over deviation trends Under Selects between trending various parameters:  Shows trends for all phase under/over deviations Δ...

  • Page 72: Trend

    MI 2893 / MI 2892 / MI 2885 Signalling Sig1 True effective value signal voltage (U ) for a user- Sig1 Sig2 Sig3 Sig12 Sig23 Sig31 specified carrier frequency (316.0 Hz in shown example) expressed in Volts or 316.0 Hz...

  • Page 73: Table

    MI 2893 / MI 2892 / MI 2885 Signalling Selects between the following options: Shows signal voltage for a user-specified signalling frequency (Sig1). Shows signal voltage for a user-specified signalling frequency (Sig2). Selects between trending various parameters: Shows signalling for phase 1 2 3 ...

  • Page 74: General Recorder

    3.14 General Recorder MI 2893/MI 2892/MI 2885 has ability to record measured data in the background. By entering GENERAL RECORDER option from RECORDERS submenu, recorder parameters can be customized in order to meet criteria about interval, start time and duration for the recording campaign. General recorder setup...
  • Page 75 MI 2893 / MI 2892 / MI 2885 General Recorder Table 55: General recorder settings description and screen symbols General recorder is active, waiting for start condition to be met. After start conditions are met (defined start time), instrument will capture waveform snapshot and start (activate) General recorder.
  • Page 76 MI 2893 / MI 2892 / MI 2885 General Recorder Define recording duration. General recorder will record measurement for given time duration:  Manual,  5, 10, 20, 30 minutes Duration  1, 6 or 12 hours, or  1, 2, 3, 7, 15, 30, 60 days.

  • Page 77: Waveform/Inrush Recorder

    MI 2893 / MI 2892 / MI 2885 Waveform/Inrush recorder See section 4.4 for details. CONFIG Shortcut to Connection setup. See 4.2 for details. CHECK C. Check connection settings. See 3.23.1 for details. Enters recorder starting date/time setup. ENTER Keys in Set start time window: Selects parameter to be changed.

  • Page 78: Setup

    MI 2893 / MI 2892 / MI 2885 Waveform/Inrush recorder Figure 57: Triggering in waveform record 3.15.1 Setup Waveform recorder setup menu is available from: MAIN MENU  MEASUREMENT SETUP  WAVE.REC.SETUP MAIN MENU  RECORDERS  WAVEFORM REC  F3 (SETUP)

  • Page 79: Capturing Waveform

    MI 2893 / MI 2892 / MI 2885 Waveform/Inrush recorder records can be recorded. This value can be changed, if necessary. More than 200 records can slow down the instrument. * Available only if Level U or Level I triggering is selected.
  • Page 80 MI 2893 / MI 2892 / MI 2885 Waveform/Inrush recorder Figure 59: Waveform recorder capture screen START Starts waveform recording. SETUP Shortcut to WAVE. REC. SETUP menu. See 3.23.1 for details. Returns to the “WAVEFORM REC.” menu. Figure 60: Waveform recorder screen STOP Stops waveform recording.
  • Page 81 MI 2893 / MI 2892 / MI 2885 Waveform/Inrush recorder Figure 61: Waveform recorder scope screen Table 59: Instrument screen symbols and abbreviations Waveform recorder is active, waiting for trigger Waveform recorder is active, recording in progress U1, U2, U3, Un...

  • Page 82: Captured Waveform

    MI 2893 / MI 2892 / MI 2885 Waveform/Inrush recorder Sets horizontal zoom. Returns to the “WAVEFORM RECORDER” setup screen. 3.15.3 Captured waveform Captured waveforms can be viewed from the Memory list menu. Figure 62: Captured waveform recorder screen Table 61: Instrument screen symbols and abbreviations Memory list recall.
  • Page 83 MI 2893 / MI 2892 / MI 2885 Waveform/Inrush recorder Shows waveforms for phase-to-phase voltage L12. 23 31 Δ Shows waveforms for phase-to-phase voltage L23. 31 Δ Shows waveforms for phase-to-phase voltage L31. 12 23 Δ Δ Shows all phase-to-phase waveforms.

  • Page 84: Transient Recorder

    MI 2893 / MI 2892 / MI 2885 Transient recorder 3.16 Transient recorder Transient is a term for short, highly damped momentary voltage or current disturbance. Table 63: Transients on the low voltage network Rise time Cause  Operation of current-limiting fuses (amplitude up to 1 kV – 2 kV) >100 µs...
  • Page 85 MI 2893 / MI 2892 / MI 2885 Transient recorder MAIN MENU  RECORDERS  TRANSIENT REC.  F3 (SETUP) Figure 63: Transient recorder setup screen – MI 2893 Table 64: Transient recorder settings description and screen symbols Envelope: Trigger value is based on envelope within voltage/current that is expected.
  • Page 86 MI 2893 / MI 2892 / MI 2885 Transient recorder Minimum value: 0,0055 * U * sqrt(2) Maximum value: 1 V Phase/Neutral current limits: Minimum value: 0.1 * sqrt(2) * I Maximum value: 1.5 * sqrt(2) * I PHASE: U: Trigger on transients at active voltage (phase/line) channels...

  • Page 87: Power Master/Master Q4 - Mi 2892/Mi 2885

    MI 2893 / MI 2892 / MI 2885 Transient recorder Modifies parameter. Enter into submenu ( ENTER Returns to the submenu. 3.16.2 Power Master/Master Q4 - MI 2892/MI 2885 A transient recording is recording with the 49 kSamples/sec sampling rate.
  • Page 88 MI 2893 / MI 2892 / MI 2885 Transient recorder Previous Envelope cycle Envelope Current cycle Trigger Level: Trigger will occur if any sample within period is greater than defined absolute trigger level. Level is defined as absolute expected monitoring value. See 5.1.20 for details.

  • Page 89: Capturing Transients

    After transient recorder is started, instrument waits for trigger occurrence. This can be seen by observing status bar, where icon is present. If trigger conditions are met, recording will be started. Figure 65: Transient recorder capture screen (waiting phase/recording) – MI 2893...
  • Page 90 MI 2893 / MI 2892 / MI 2885 Transient recorder Figure 66: Transient recorder capture screen (waiting phase/recording) – MI 2892/MI 2885 Table 68: Instrument screen symbols and abbreviations Transient recorder is active, waiting for trigger Transient recorder is active, recording in progress...

  • Page 91: Captured Transients

    MI 2893 / MI 2892 / MI 2885 Transient recorder Selects which waveform to zoom (only in U,I or U/I ). ENTER Returns to the “TRANSIENT RECORDER” screen. 3.16.4 Captured transients Captured transient records can be viewed from the Memory list where captured waveforms can be analysed.

  • Page 92: Events Table

    MI 2893 / MI 2892 / MI 2885 Events table Shows waveforms for phase-to-phase voltage L23. 31 Δ Shows waveforms for phase-to-phase voltage L31. 12 23 Δ Δ Shows waveforms for all phase-to-phase voltages. 12 23 31 ZOOM Sets horizontal zoom Sets vertical zoom.
  • Page 93 MI 2893 / MI 2892 / MI 2885 Events table Figure 69: Voltage event in detail view screen Table 72: Instrument screen symbols and abbreviations Date Date when selected event has occurred Unified event number (ID) Indicate phase or phase-to-phase voltage where event has occurred: 1 –...

  • Page 94: Phase View

    MI 2893 / MI 2892 / MI 2885 Events table Shows poly-phase voltage interrupts only, according to the IEC 61000-4- 30 requirements. START time and Duration in table is referenced to voltage interrupt only. Shows selected waveform and inrush view.
  • Page 95 MI 2893 / MI 2892 / MI 2885 Events table event number, event start time, duration and level. Additionally, in colon “T” type of event is shown (see table below for details). Figure 70: Voltage events screens You can also see details of each individual voltage event and waveform/inrush view of all events.

  • Page 96: Alarms Table

    MI 2893 / MI 2892 / MI 2885 Alarms table  Shows dips only. INT SWELL  Shows interrupts only. SWELL  SWELL Shows swells only. DIP INT Filters events by phase: Shows only events on phase L1. 2 3 T Shows only events on phase L2.
  • Page 97 MI 2893 / MI 2892 / MI 2885 Alarms table Figure 71: Alarms list screen Table 76: Instrument screen symbols and abbreviations Date Date when selected alarm has occurred Start Selected alarm start time (when first U value cross threshold) Indicate phase or phase-to-phase voltage where event has occurred: 1 –...

  • Page 98: Rapid Voltage Changes (Rvc) Table

    MI 2893 / MI 2892 / MI 2885 Rapid voltage changes (RVC) table  Shows only alarms on phase L1. 2 3 N 12 23 31 T  3 N 12 23 31 T Shows only alarms on phase L2.

  • Page 99: Inrush Table

    MI 2893 / MI 2892 / MI 2885 Inrush table dMax ∆Umax - maximum absolute difference between any of the U Rms(1/2) values during the RVC event and the final arithmetic mean 100/120 U value just Rms(1/2) prior to the RVC event.

  • Page 100: E-Meter Recorder (Mi 2892/Mi 2885)

    (A 1588) or I/U transducer (A 1037) to achieve the highest possible accuracy. Note: Metrel suggest to use A 1398 PQA, A 1588 current clamps or A 1037 U/I transducer to achieve the system accuracy approx. to 1%.
  • Page 101 MI 2893 / MI 2892 / MI 2885 E-Meter recorder (MI 2892/MI 2885) Figure 75: PQI setup connection and Connection check 2. Install Photo – scanning head A 1756 into the tested E-Meter. For proper installation, follow the procedure in the manual for A 1756.
  • Page 102 MI 2893 / MI 2892 / MI 2885 E-Meter recorder (MI 2892/MI 2885) Note: Recorder will run until one of the following end conditions is met:  STOP key was pressed by user  Given Duration criteria was met ...
  • Page 103 MI 2893 / MI 2892 / MI 2885 E-Meter recorder (MI 2892/MI 2885) Figure 78: E-Meter Recorder setup menu Table 83: E-Meter recorder setup settings description Selection of E-Meter measured value, which is tested (Active/Reactive). Measured value Active: Q I + Q II + Q III + Q IV (combined) Reactive: Q I + Q II + Q III + Q IV (QvFund / Qenergy) Q - fundamental vector reactive power.
  • Page 104 MI 2893 / MI 2892 / MI 2885 E-Meter recorder (MI 2892/MI 2885) Measurement place: Description of measurement place E-Meter SN: Serial Number of tested E-Meter E-Meter nominal data: E-Meter data, like nominal voltage & current, cvbvbvbnvbnvnbnbnbn type, producer etc..

  • Page 105: Memory List

    MI 2893 / MI 2892 / MI 2885 Memory List 3.22 Memory List Using this menu user can view and browse saved records. By entering this menu, information about records is shown. Figure 79: Memory list screen (Folder structure) Table 84: Instrument screen symbols and abbreviations Folder No.
  • Page 106 MI 2893 / MI 2892 / MI 2885 Memory List COPY FOLD. COPY ALL Copy selected folder to USB Copy all data from SD card to USB Opens confirmation window for clearing all saved records. Keys in confirmation window: Selects YES or NO.
  • Page 107 MI 2893 / MI 2892 / MI 2885 Memory List o GEN – general record. General record generates also AVG, EVT, PAR, ALM, SEL files, which can be found on SD Card and are imported into PowerView. Indicates type of record, which can be one of following: ...

  • Page 108: General Record

    MI 2893 / MI 2892 / MI 2885 Memory List 3.22.1 General Record This type of record is made by GENERAL RECORDER. Record front page is similar to the GENERAL RECORDER setup screen, as shown on figure below. Figure 81: Front page of General record in MEMORY LIST menu Table 88: Recorder settings description Record No.
  • Page 109 MI 2893 / MI 2892 / MI 2885 Memory List Enters particular signal group (TREND view). ENTER Exits to MEMORY LIST menu. CLEAR Clears the last record. In order to clear complete memory, delete records one by one. Opens confirmation window for clearing all saved records.
  • Page 110 MI 2893 / MI 2892 / MI 2885 Memory List Maximal ( ), average ( ) and minimal ( ) recorded value of phase-to-phase U12, U23, U31 voltage U for time interval selected by cursor. 12Rms 23Rms 31Rms Maximal ( ), average ( ) and minimal ( ) recorded value of current I...

  • Page 111: Waveform Snapshot

    MI 2893 / MI 2892 / MI 2885 Memory List 3.22.2 Waveform snapshot This type of record can be made by using key (press and hold key). Snapshot is performed only on the measurement screens. Figure 83: Front page of Snapshot in MEMORY LIST menu Table 92: Recorder settings description Record No.

  • Page 112: Waveform/Inrush Record

    MI 2893 / MI 2892 / MI 2885 Memory List ENTER Exits to MEMORY LIST menu. USB STICK Enable USB memory stick support. Copy all files from selected folder to USB stick. COPY FOLD. Copy selected file to USB stick.

  • Page 113: Measurement Setup Submenu

    MI 2893 / MI 2892 / MI 2885 Measurement Setup submenu 3.23 Measurement Setup submenu From the “MEASUREMENT SETUP” submenu measurement parameters can be reviewed, configured and saved. Figure 85: MEASUREMENT SETUP submenu Table 94: Description of Measurement setup options Connection setup Setup measurement parameters.
  • Page 114 MI 2893 / MI 2892 / MI 2885 Measurement Setup submenu Figure 86: “CONNECTION SETUP” screen Table 96: Description of Connection setup Set nominal voltage according to the network voltage. If voltage is measured over potential transformer, then press ENTER for...
  • Page 115 MI 2893 / MI 2892 / MI 2885 Measurement Setup submenu Note: For Smart clamps (A 1502, A 1227, A 1281, …) always select “Smart clamps”. Check in the Metrel General Catalogue, which clamps are developed as “Smart clamps). Note: Use “None" option for voltage measurements only.
  • Page 116 MI 2893 / MI 2892 / MI 2885 Measurement Setup submenu  OpenD: 3-phase 2 -wire (Open Delta) system.  INV1W: Single phase invertor connection.  INV3W: Single phase invertor connection. Synchronization channel. This channel is used for instrument synchronization to the network frequency. Also, a frequency measurement is performed on that channel.
  • Page 117 MI 2893 / MI 2892 / MI 2885 Measurement Setup submenu Select system frequency. According to this setting 10 or 12 cycle interval will be used for calculus (according to IEC 61000-4-30) at 50/60Hz:  50 Hz – 10 cycle intervals System frequency ...

  • Page 118: Event Setup

    MI 2893 / MI 2892 / MI 2885 Measurement Setup submenu Set factory default parameters. These are: Nominal voltage: 230V (L-N); Voltage ratio: 1:1; Δ  : 1 Phase current clamps: Smart Clamps; Neutral current clamps: Smart Clamps; Connection: 4W;...
  • Page 119 MI 2893 / MI 2892 / MI 2885 Measurement Setup submenu Figure 87: Event setup screen Table 98: Description of Event setup Nominal voltage Indication of type (L-N or L-L) and value of nominal voltage. Swell Threshold Set swell threshold value in % of nominal voltage.

  • Page 120: Alarm Setup

    MI 2893 / MI 2892 / MI 2885 Measurement Setup submenu Selects Voltage events setup. parameter to be modified Changes selected parameter value. Returns to the “MEASUREMENT SETUP” submenu. 3.23.3 Alarm setup Up to 7 different alarms, based on any measurement quantity which is measured by instrument, can be defined.

  • Page 121: Signalling Setup

    MI 2893 / MI 2892 / MI 2885 Measurement Setup submenu Level column - Minimal alarm duration. Triggers only if threshold is crossed for a defined period of time. Duration Note: It is recommended that for flicker measurement, recorder is set to 10 min.

  • Page 122: Rapid Voltage Changes (Rvc) Setup

    MI 2893 / MI 2892 / MI 2885 Measurement Setup submenu SIGN. 1 FREQUENCY observed signalling frequency. SIGN. 2 FREQUENCY observed signalling frequency. DURATION Duration of RMS record, which will be captured after treshold value is reached. THRESHOLD Threshold value expressed in % of nominal voltage, which will trigger recording of signalling event.

  • Page 123: Measuring Methods Setup

    Please note that instrument record all measurement (Classic and Modern), regardless of selected method. Figure 91: Measuring Methods setup screen – MI 2893 Figure 92: Measuring Methods setup screen – MI 2892/MI 2885 Table 106: Description of Measuring Methods setup Power Modern (IEEE 1459) measuring method.

  • Page 124: Transient Setup

    Returns to the “MEASUREMENT SETUP” submenu. 3.23.7 Transient setup Note: MI 2893 – Transient Recorder runs simultaneously with General Recorder MI 2892/MI 2885 – Transient Recorder runs as independent recorder (could not run simultaneously with General Recorder). In this menu parameters for transient trigger could be selected. It is possible to select trigger for:...

  • Page 125: General Setup Submenu

    General Setup submenu Figure 94: Transient setup screen – MI 2892/MI 2885 Note: MI 2893 – all triggers could be activated at the same time MI 2892/MI 2885 - only one trigger is available: Envelope: U or U or I or I ;...

  • Page 126: Communication

    INTERNET (3G, GPRS). Instrument is connected to the internet over 3G or GPRS. This option minimises internet 3G traffic with Metrel GPRS Relay server and PowerView, in order to reduce link cost. Instrument in idle state (while not connected to the PowerView) consume about 5MB/per day.

  • Page 127: Time & Date

    MI 2893 / MI 2892 / MI 2885 General Setup submenu Table 111: Description of Communication setup options Select USB or INTERNET, INTERNET (3G / GPRS), INTRANET (LAN) PC connection communication port. Select GPS or MI 3108 / MI 3109 communication. GPS is used for A...
  • Page 128 Note: GPS clock source is automatically set if GPS is enabled and detected. Selects time zone. Note: MI 2893/MI 2892/MI 2885 has the ability to synchronize its system time clock with Coordinated Universal Time (UTC time) Time zone provided by externally connected GPS module.

  • Page 129: Language

    MI 2893 / MI 2892 / MI 2885 General Setup submenu 3.24.3 Language Different languages can be selected in this menu. Figure 98: Language setup screen Table 115: Keys in Language setup screen Selects language. Confirms the selected language. ENTER Returns to the “GENERAL SETUP”...

  • Page 130: Lock/Unlock

    Returns to the “GENERAL SETUP” submenu. 3.24.5 Lock/Unlock MI 2893/MI 2892/MI 2885 have the ability to prevent unauthorized access to all important instrument functionality by simply locking the instrument. If instrument is left for a longer period at an unsupervised measurement spot, it is recommended to prevent unintentional stopping of record, instrument or measurement setup modifications, etc.
  • Page 131 MI 2893 / MI 2892 / MI 2885 General Setup submenu Figure 101: Lock/Unlock screen Table 118: Description of Lock/Unlock screen Four-digit numeric code used for Locking/Unlocking the instrument. Press ENTER key for changing the Pin code. “Enter PIN” window will appear on screen.

  • Page 132: Colour Model

    MI 2893 / MI 2892 / MI 2885 General Setup submenu Figure 102: Locked instrument screen Note: In case user forget unlock code, general unlock code “7350” can be used to unlock the instrument. 3.24.6 Colour model In COLOUR MODEL menu, user can change colour representation of phase voltages and currents, according to the customer needs.

  • Page 133: Backlight

    MI 2893 / MI 2892 / MI 2885 General Setup submenu Keys in Edit colour screen: Shows selected colour for phase L1. L2 L3 N Shows selected colour for phase L2. L3 N Shows selected colour for phase L3. L1 L2 Shows selected colour for neutral channel N.
  • Page 134 MI 2893 / MI 2892 / MI 2885 General Setup submenu Table 123: Keys in Backlight screen Selects parameter. Selects parameter. Entering into selected parameter / confirms parameter. ENTER Returns to the “GENERAL SETUP” submenu.

  • Page 135: Recording Practice And Instrument Connection

    MI 2893 / MI 2892 / MI 2885 Recording Practice and Instrument Connection 4 Recording Practice and Instrument Connection In following section recommended measurement and recording practice is described. 4.1 Measurement campaign Power quality measurements are specific type of measurements, which can last many days, and mostly they are performed only once.
  • Page 136 MI 2893 / MI 2892 / MI 2885 Measurement campaign...
  • Page 137 MI 2893 / MI 2892 / MI 2885 Measurement campaign...
  • Page 138 Figure 105: Recommended measurement practice Step 1: Instrument setup On site measurements can be very stressful, and therefore it is good practice to prepare measurement equipment in an office. Preparation of MI 2893/MI 2892/MI 2885 include following steps:  Visually check instrument and accessories.
  • Page 139 MI 2893 / MI 2892 / MI 2885 Measurement campaign Step 3.2: Nominal voltage and ratio  Select instrument nominal voltage according to the network nominal voltage. Note: For 4W and 1W measurement all voltages are specified as phase-to-neutral (L-N). For 3W and Open Delta measurements all voltages are specifies as phase-to-phase (L-L).
  • Page 140 Select parameters related to the data structure organisation on the SD card, type of recorder starts time and transient selection. See section 3.23.4 for details. Step 3.10: Transient setup (MI 2893 only; on MI 2892/MI 2885 Transient Recorder run as independent one – not simultaneously with the General Recorder) Select parameters for defining triggers for capturing the transients, separate for voltage and currents.

  • Page 141: Connection Setup

    MI 2893 / MI 2892 / MI 2885 Connection setup 4.2 Connection setup 4.2.1 Connection to the LV Power Systems This instrument can be connected to different type of networks. Proper connection should be selected to obtain the reliable results.
  • Page 142 MI 2893 / MI 2892 / MI 2885 Connection setup Figure 108: 3-phase 4-wire system 3-phase 3-wire system (3W) In order to select this connection scheme, choose following connection on the instrument: Figure 109: Choosing 3-phase 3-wire system on instrument Instrument should be connected to the network according to figure below.
  • Page 143 MI 2893 / MI 2892 / MI 2885 Connection setup Open Delta (Aaron) 3-wire system (OpenD) In order to select this connection scheme, choose following connection on the instrument: Figure 111: Choosing Open Delta (Aaron) 3-wire system on instrument Instrument should be connected to the network according to figure below.
  • Page 144 MI 2893 / MI 2892 / MI 2885 Connection setup Instrument should be connected to the network according to figure below. Figure 114: 1-phase 3-wire system Note: In case of events capturing, it is recommended to connect unused voltage terminals to N voltage terminal.
  • Page 145 MI 2893 / MI 2892 / MI 2885 Connection setup Figure 116: 2-phase 4-wire system Note: In case of events capturing, it is recommended to connect unused voltage terminal to N voltage terminal. Single - phase Inverter (INV1W) In order to select this connection scheme, choose following connection on the instrument: Figure 117: Choosing single- phase Inverter system on instrument Instrument should be connected to the network according to figure below.

  • Page 146: Connection To The Mv Or Hv Power System

    MI 2893 / MI 2892 / MI 2885 Connection setup Note: In case of events capturing, it is recommended to connect unused voltage terminal to N voltage terminal. Three - phase photovoltaic Inverter (INV3W) In order to select this connection scheme, choose following connection on the instrument: Figure 119: Choosing three- phase Inverter system on instrument Instrument should be connected to the network according to figure below.
  • Page 147 MI 2893 / MI 2892 / MI 2885 Connection setup Figure 121: Voltage ratio for 11 kV / 110 transformer example Instrument should be connected to the network according to figure below. power plant measuring instruments high voltage Transformer Type:...
  • Page 148 MI 2893 / MI 2892 / MI 2885 Connection setup power plant measuring instruments high voltage Transformer Type: xA / 5A xA / 5A xA / 5A Δ Measurement Settings  Connection setup  Nominal Voltage  Figure 123: Connecting instrument to the existing current transformers in medium voltage system (Delta –...
  • Page 149 MI 2893 / MI 2892 / MI 2885 Connection setup power plant measuring instruments high voltage xA / 5A xA / 5A xA / 5A Measurement Settings  Connection setup  Nominal Voltage  Δ Figure 125: Connecting instrument to the existing current transformers in medium voltage system (Star –...

  • Page 150: Current Clamp Selection And Transformation Ratio Setting

    Smart clamps: flex clamps A 1502, A1227 and iron clamps A1281, A 1588 for example. Also, other Metrel clamp models A1033 (1000 A), A1069 (100 A), etc. can be used. For more details about the current clamps, please check the Metrel‘s General catalogue.
  • Page 151 MI 2893 / MI 2892 / MI 2885 Connection setup Figure 128: Parallel feeding of large load Example: 2700 A current load is fed by 3 equal parallel cables. In order to measure current, we can embrace only one cable with clamps, and select: Current transformer, Primary current: 3 A, Secondary current: 1 A in clamp menu.
  • Page 152 MI 2893 / MI 2892 / MI 2885 Connection setup Figure 129: Current clamps selection for indirect current measurement Over-dimensioned current transformer Installed current transformers on the field are usually over-dimensioned for “possibility to add new loads in future”. In that case current in primary transformer can be less than 10% of rated transformer current.
  • Page 153 Connection setup Automatic current clamps recognition Metrel developed Smart current clamps product family in order to simplify current clamps selection and settings. Smart clamps are multi-range switchless current clamps automatically recognized by instrument. In order to activate smart clamp recognition, the following procedure should be followed for the first time: 1.

  • Page 154: Connection Check

    MI 2893 / MI 2892 / MI 2885 Connection setup ENTER Confirms selected range and returns to previous menu. Clamps Status menu indicates that there is an inconsistence between current clamps defined in Clamps Setup menu and clamps present at the moment.
  • Page 155 MI 2893 / MI 2892 / MI 2885 Connection setup Measure- Description Action to resolve issue Status ment Measured voltage is within 90% ÷ 110% range. All voltage measurements (RMS, harmonics, voltage events) are valid. Measured voltage is not within 90% ÷...

  • Page 156: Temperature Probe Connection

    Open Date/time setup screen (for quick real-time clock check) Selects which measurement setup should be considered: VIEW Consumed or Generated. MI 2893 performs the most optimal clamp current range (Auto range is AUTOSET I performed automatically) Check limits for measured parameters: LIMITS Returns to the one menu back.

  • Page 157: Gps Time Synchronization Device Connection

    Confirms selected Time zone and returns to “GENERAL SETUP” menu. When the time zone is set, MI 2893/MI 2892/MI 2885 will synchronize its system time clock and internal RTC clock with the received UTC time. GPS module also provides the instrument with extremely accurate synchronization pulses every second (PPS –...

  • Page 158: Remote Instrument Connection (Over Internet / Internet(3G/Gprs) / Intranet (Lan))

    2 minutes). Note: Outgoing ports 80, 443, 7781 ÷ 8888 to the gprs.metrel.si server should be opened on remote firewall where instrument is placed! 2. User enters instrument serial number on PowerView and connects to the instrument over Metrel server.

  • Page 159: Instrument Setup On Remote Measurement Site

    5 hours (from 5 to 7 hours for MI 2892/2885) and more than 3 hours (from 3 – to 5 hours for MI 2893), depends on the battery capacity and battery state. After instrument installation, connection parameters should be set.

  • Page 160: Powerview Setup For Instrument Remote Access

    DHCP Server. It can take up to 2 minutes in order to get new IP number. Once instrument IP address is obtained, it will try to connect to Metrel server, over which communication with PowerView is assured. Once everything is connected, icon will appear on the Status bar.

  • Page 161: Remote Connection

    MI 2893 / MI 2892 / MI 2885 Remote instrument connection (over Internet / Internet(3G/GPRS) / Intranet (LAN)) PowerView settings Press on Remote in toolbar in order to open remote connection settings, as shown on figure below. Figure 136: PowerView v3.0 remote connection settings form...
  • Page 162 PowerView v3.0 http access to the internet. Step 2: PowerView v3.0 connection to Metrel Server After establishing internet connection in Step 1, PowerView v3.0 will contact Metrel Server. If connection was successful, a green icon and “CONNECTED” status will appear between “Metrel Server”...
  • Page 163 After the PowerView v3.0 successful connects to the Metrel Server, server will check if your instrument is waiting for your connection. If that is a case, instrument will establish connection with Metrel server. The green icon and “CONNECTED” status will appear between “Metrel Server” and “Remote...
  • Page 164 Figure 139: Remote instrument connection to Metrel Server established (Step 3) Step 4: Remote Instrument connection to PowerView v3.0 After first three steps were successfully finished, MI 2893/MI 2892/MI 2885 instrument will automatically connect to the PowerView v3.0 via VPN connection, made through Metrel server and establish connection.
  • Page 165 MI 2893 / MI 2892 / MI 2885 Remote instrument connection (over Internet / Internet(3G/GPRS) / Intranet (LAN)) Figure 140: Remote instrument connection to PowerView v3.0 established (Step 4) While the data is refreshed, the Remote button is displayed in green, to indicate that the connection is active, as shown below.
  • Page 166 MI 2893 / MI 2892 / MI 2885 Remote instrument connection (over Internet / Internet(3G/GPRS) / Intranet (LAN)) Figure 142: Remote connection icon Downloading data If remote connection settings are correct and “Remote Instrument” is connected to PowerView v3.0, download data is possible. Open the download window by pressing F5, or by clicking on the button in the toolbar, or by selecting Download from Tools menu.
  • Page 167 A backup PowerView v3.0 file is always created at this point, compressed into a *.zip file and saved inside your MyDocuments/Metrel/PowerView/PQData folder. This backup copy is made every time a file is created or opened, to make sure that you can recover all your downloaded data in case of accidental delete or change.
  • Page 168 MI 2893 / MI 2892 / MI 2885 Remote instrument connection (over Internet / Internet(3G/GPRS) / Intranet (LAN)) Figure 145: Real time scope window in remote connection, with several channels selected The figure above shows an online window, with several channels selected. While online view is active, data are automatically updated.
  • Page 169 MI 2893 / MI 2892 / MI 2885 Remote instrument connection (over Internet / Internet(3G/GPRS) / Intranet (LAN)) Figure 146: Remote Instrument Configuration form Please click on the “Read” button in order to receive current instrument settings. After retrieving data from the remote instrument, form should be filled with data, as shown on figure below.
  • Page 170 MI 2893 / MI 2892 / MI 2885 Remote instrument connection (over Internet / Internet(3G/GPRS) / Intranet (LAN)) Figure 147: Remote Recorder configuration By clicking on “Start” button, instrument will start selected recorder in the same manner as would user start recorder directly on instrument.
  • Page 171 MI 2893 / MI 2892 / MI 2885 Remote instrument connection (over Internet / Internet(3G/GPRS) / Intranet (LAN)) Figure 148: Recording in progress...

  • Page 172: Number Of Measured Parameters And Connection Type Relationship

    4.4 Number of measured parameters and connection type relationship Parameters which MI 2893/MI 2892/MI 2885 displays and measures, mainly depends on network type, defined in CONNECTION SETUP menu – Connection type. In example if user choose single phase connection system, only measurements relate to single phase system will be present. Table below shows dependencies between measurement parameters and type of network.
  • Page 173 MI 2893 / MI 2892 / MI 2885 Number of measured parameters and connection type relationship Connection type INV – 3W INV - 1W Menu               ...
  • Page 174 MI 2893 / MI 2892 / MI 2885 Number of measured parameters and connection type relationship In the similar manner recording quantities are related to connection type too. Recording Signals in GENERAL RECORDER menu are chosen according to the Connection type, and record PROFILE in according to the next table.
  • Page 175 MI 2893 / MI 2892 / MI 2885 Number of measured parameters and connection type relationship Active Energy Reactive Ener. Power factors Connection type Menu INV-1W INV-3W Crest Factor Frequency Harmonics (0÷50) Interharm. (0÷50) Unbalance Flicker Signalling   ...
  • Page 176 MI 2893 / MI 2892 / MI 2885 Number of measured parameters and connection type relationship Combined Fundamental Nonfundament. Active Energy Reactive Ener. Power factors Legend:  - Quantity included. - Maximal value for each interval is recorded. - RMS or arithmetic average for each interval is recorded (see 5.1.15 for details).
  • Page 177 MI 2893 / MI 2892 / MI 2885 Number of measured parameters and connection type relationship Table 134: Quantities recorded by instrument (Limited Profile) Connection type Menu OpenD Crest Factor Frequency Harmonics (0÷25) Interharm. (0÷25) Unbalance Flicker Signalling  ...
  • Page 178 MI 2893 / MI 2892 / MI 2885 Number of measured parameters and connection type relationship Connection type Menu INV-1W INV-3W Crest Factor Frequency Harmonics (0÷50) Interharm. (0÷50) Unbalance Flicker Signalling     Events Harmonics (0÷50) Interharm. (0÷50)

  • Page 179: Theory And Internal Operation

    - Active RMS or arithmetic average (AvgON) for each interval is recorded (see 5.1.15 for details). 5 Theory and internal operation This section contains basic theory of measuring functions and technical information of the internal operation of the MI 2893/MI 2892/MI 2885 instrument, including descriptions of measuring methods and logging principles. 5.1 Measurement methods 5.1.1 Measurement aggregation over time intervals...

  • Page 180: Current Measurement (Magnitude Of Supply Current)

    MI 2893 / MI 2892 / MI 2885 Measurement methods All voltage measurements represent RMS values of the voltage magnitude over a 10/12-cycle time interval. Every interval is contiguous, and not overlapping with adjacent intervals. Figure 149: Phase and Phase-to-phase voltage Voltage values are measured according to the following equation: ...

  • Page 181: Frequency Measurement

    MI 2893 / MI 2892 / MI 2885 Measurement methods 5.1.4 Frequency measurement Standard compliance: IEC 61000-4-30 Class A (Section 5.1) During RECORDING with aggregation time Interval: ≥10 sec frequency reading is obtained every 10 s. The fundamental frequency output is the ratio of the number of integral cycles counted during the 10 s time clock interval, divided by the cumulative duration of the integer cycles.
  • Page 182 MI 2893 / MI 2892 / MI 2885 Measurement methods In table below summary of all power measurement is shown. Table 135: Summary and grouping of the phase power quantities Quantity Combined Fundamental Nonfundamental powers powers Powers Apparent (VA) fund...
  • Page 183 MI 2893 / MI 2892 / MI 2885 Measurement methods Combined phase active power:      [W], p: 1,2,3   Combined apparent and nonactive power, and power factor are calculated according to the following equations: Combined phase apparent power: ...
  • Page 184 MI 2893 / MI 2892 / MI 2885 Measurement methods Fundamental phase power measurements Standard compliance: IEEE STD 1459-2010 All fundamental power measurements are calculated from fundamental voltages and currents obtained from harmonic analysis (see section 5.1.8 for details). Fundamental phase active power: (17) ...
  • Page 185 MI 2893 / MI 2892 / MI 2885 Measurement methods -DPF +DPF +DPF -DPF Positive sequence apparent power: (23)       [VA], Positive sequence power factor:  (24)    and  are obtained from unbalance calculus. See section 5.1.11 for details.

  • Page 186: Classic Vector And Arithmetic Power Measurement

    MI 2893 / MI 2892 / MI 2885 Measurement methods Total effective current distortion power:  3   [var] fund (32) where:   fund Total effective voltage distortion power:  3   [var] fund (33) where: ...
  • Page 187 MI 2893 / MI 2892 / MI 2885 Measurement methods Figure 152: Vector representation of total Figure 153: Arithmetic representation of total power power calculus calculus In table below summary of all power measurement is shown. Table 137: Summary and grouping of the phase power quantities...
  • Page 188 MI 2893 / MI 2892 / MI 2885 Measurement methods    Total active power: [W], (39)    Total nonactive power (vector): [var], (40)   (41) Total apparent power (vector): [VA], PFv  Total power factor (effective):...

  • Page 189: Energy

    (see section 5.1.8 for details). 5.1.7 Energy Standard compliance: IEC 62053-21 Class 1S, IEC 62053-23 Class 2 ... MI 2893/MI 2892 Standard compliance: IEC 62053-21 Class 1, IEC 62053-23 Class 2 ... MI 2885 Energy measurement is divided in two sections: ACTIVE energy based on active power measurement and REACTIVE energy, based on fundamental reactive power measurement.

  • Page 190: Harmonics And Interharmonics

    MI 2893 / MI 2892 / MI 2885 Measurement methods Fundamental Reactive Energy Active Energy Figure 154: Energy counters and quadrant relationship Instrument has 3 different counters sets: 1. Total counters are used for measuring energy over a complete recording. When recorder starts it sums the energy to existent state of the counters.
  • Page 191 MI 2893 / MI 2892 / MI 2885 Measurement methods Voltage harmonics and THD 1 2 3 4 5 6 10 periods Current harmonics and THD 1 2 3 4 5 6 10 periods Figure 156: Current and voltage harmonics ...

  • Page 192: Signalling

    MI 2893 / MI 2892 / MI 2885 Measurement methods       (60) Total voltage harmonic distortion: , p: 1,2,3            (61) Total current harmonic distortion: , p: 1,2,3 ...

  • Page 193: Flicker

    MI 2893 / MI 2892 / MI 2885 Measurement methods  RSS value of four neighbouring frequency bins if signalling frequency differs from the power system bin frequency (for example, a ripple control signal with frequency value of 218 Hz in a 50 Hz power system is measured based on the RMS values of 210, 215, 220 and 225 Hz bins).

  • Page 194: Under-Deviation And Over-Deviation

    MI 2893 / MI 2892 / MI 2885 Measurement methods The supply voltage unbalance is evaluated using the method of symmetrical components. In addition to the positive sequence component U , under unbalanced conditions there also exists negative sequence component U and zero sequence component U .

  • Page 195: Voltage Events

    MI 2893 / MI 2892 / MI 2885 Measurement methods  Over   (72)    Over Under-deviation and over-deviation parameters may be useful when it is important to avoid, for example, having sustained under-voltages being cancelled in data by sustained over-voltages.
  • Page 196 MI 2893 / MI 2892 / MI 2885 Measurement methods [n] U [n+1] rms(1/2) rms(1/2) half cycle period (10 ms @ 50 Hz) Swell duration duration Swell limit swell U nominal Dip limit Interrupt duration Interruption limit Figure 160: Voltage events definition Voltage dip Standard compliance: IEC 61000-4-30 Class A (Sections 5.4.1 and 5.4.2)
  • Page 197 MI 2893 / MI 2892 / MI 2885 Measurement methods Figure 161:Voltage dip related screens on the instrument A voltage dip is characterized by following data: Dip Start time, Level (U ) and Dip duration:  – residual dip voltage, is the lowest U value measured on any channel during the dip.

  • Page 198: Alarms

    MI 2893 / MI 2892 / MI 2885 Measurement methods Voltage interrupt Standard compliance: IEC 61000-4-30 Class A (Section 5.5) Measuring method for voltage interruptions detection is same as for dips and swells, and is described in previous sections. The Interrupt Threshold is a percentage of nominal voltage defined in CONNECTION menu. Interrupt Hysteresis is difference in magnitude between the Interrupt start and Interrupt end thresholds.

  • Page 199: Rapid Voltage Changes (Rvc)

    MI 2893 / MI 2892 / MI 2885 Measurement methods Each alarm has attributes described in table below. Alarm occurs when 10/12-cycle measured value on phases defined as Phase, cross Threshold value according to defined Trigger slope, minimally for Minimal duration value.

  • Page 200: Data Aggregation In General Recording

    MI 2893 / MI 2892 / MI 2885 Measurement methods RVC event duration RVC threshold with 50% hysteresis RVC Threshold 100/120 RMS(½) ΔUss Arithmetic mean values of the previous RMS(½) ΔUmax 100/120 U values RMS(½) DIP Threshold Time Figure 163: RVC event description ...
  • Page 201 MI 2893 / MI 2892 / MI 2885 Measurement methods End of Interval 10 min interval (x+1) 10 min interval (x) overlap 10/12 cycles 10/12 cycles 10/12 cycles 10/12 cycles 10/12 cycles 10/12 cycles Figure 164: Synchronization and aggregation of 10/12 cycle intervals Depending from the quantity, for each aggregation interval instrument computes average, minimal, maximal and/or active average value, this can be RMS (root means square) or arithmetical average.
  • Page 202 MI 2893 / MI 2892 / MI 2885 Measurement methods Min, Avg, AvgOn, Max Combined Arithmetic average Arithmetic average Min, Avg, AvgOn, Max Power Fundamental Arithmetic average Min, Avg, AvgOn, Max Nonfundamental Min, Avg, AvgOn, Max Min, Avg, AvgOn, Max...
  • Page 203 MI 2893 / MI 2892 / MI 2885 Measurement methods Figure 165: Avg vs. Avgon, switching load current After 10 minutes values will be: Irms (rms average) = 50A Irms (rms AvgOn) = 100A AvgOn considers only those measurements where current is greater than zero.

  • Page 204: Flagged Data

    Figure 167: Flagging data indicate that aggregated value might be unreliable 5.1.18 Waveform snapshot During measurement campaign MI 2893/MI 2892/MI 2885 have the ability to take waveform snapshot. This is particularly useful for storing temporary characteristics or network behaviour. Snapshot stores all network signatures and waveform samples for 10/12 cycles.
  • Page 205 MI 2893 / MI 2892 / MI 2885 Measurement methods trigger and post-trigger buffers. Pre and post-trigger buffers are composed of waveform snapshots taken before and after trigger occurrence, as shown on following figure. Record Duration = 2 sec PostTrigger=1sec...
  • Page 206 MI 2893 / MI 2892 / MI 2885 Measurement methods Voltage Duration (2 sec) Duration (2 sec) Pretrigger Pretrigger (1 sec) (1 sec) Dip Treshold (90 % U Rms(1/2) Trigger Point Trigger Point (cause: dip) (cause: interrupt) Int. Treshold (5 % U Waveform record No.1...
  • Page 207 User can perform single or continuous waveform recordings up to 200 records (default value; maximum number could be changed by the user – up to 1500). In continuous waveform recording, MI 2893/MI 2892/MI 2885 will automatically initialize next waveform recording upon completion of the previous one.

  • Page 208: Transient Recorder

    MI 2893 / MI 2892 / MI 2885 Measurement methods voltage U values (one cycle RMS voltage refreshed each half cycle) is measured for each interval. Rms(1/2) In following figures, Level triggering is shown. Measured signal Inrush, fluctuation or other event...

  • Page 209: 50160 Standard Overview

    MI 2893 / MI 2892 / MI 2885 EN 50160 Standard Overview Level Allowed waveform area (envelope) Figure 175: Transients trigger detection (envelope) Level trigger is activated if sampled voltage/current is greater than given limit. Level Figure 176: Transients trigger detection (level) Note: Saving to the instrument data memory induces dead time between consecutive transient records up to 8 seconds, before new transient can be captured.

  • Page 210: Power Frequency

    MI 2893 / MI 2892 / MI 2885 EN 50160 Standard Overview +10% 230V 100% -15% Plt ≤ 1 1 Week Flicker severity Plt 0 ÷ 2 %, Voltage unbalance u- 10 min 1 Week occasionally 3% Total harm. distortion, THD...

  • Page 211: Interharmonic Voltage

    MI 2893 / MI 2892 / MI 2885 EN 50160 Standard Overview 3,5 % 1,0 % 6..24 0,5 % 3,0 % 0,75 % 2,0 % 1,5 % 1,5 % 1,5 % 5.2.5 Interharmonic voltage The level of interharmonics is increasing due to the development of frequency converters and similar control equipment.

  • Page 212: Voltage Swells

    5.2.12 MI 2893/MI 2892/MI 2885 recorder setting for EN 50160 survey MI 2893/MI 2892/MI 2885 is able to perform EN 50160 surveys on all values described in previous sections. In order to simplify procedure, MI 2893/MI 2892/MI 2885 has predefined recorder configuration (EN 50160) for it.
  • Page 213 MI 2893 / MI 2892 / MI 2885 EN 50160 Standard Overview Figure 178: Predefined EN50160 recorder configuration After recording is finished, EN 50160 survey is performed on PowerView v3.0 software. See PowerView v3.0 manual for details.

  • Page 214: Technical Specifications

    * The charging time and the operating hours are given for batteries with a nominal capacity of 2400 mAh without display illumination and switching off the transient recorder during the powering via the batteries (valid for MI 2893). 6.2 Measurements 6.2.1 General description...
  • Page 215 MI 2893 / MI 2892 / MI 2885 Measurements Max. transient peak current Depends on used current clamps (check specification for current clamps) For transient detection use fixed current range. Phase - Neutral input impedance: MI 2893 2.45 MΩ Phase - Neutral input impedance: MI 2892/MI 6 MΩ...

  • Page 216: Phase Voltages

    MI 2893 / MI 2892 / MI 2885 Measurements 6.2.2 Phase Voltages , AC+DC 10/12 cycle phase RMS voltage: U 1Rms 2Rms 2Rms NRms Measuring Range Resolution* Accuracy Nominal Voltage U ± 0.1 %  U 10% U ÷ 150% U 10 mV, 100mV 50 ÷...
  • Page 217 MI 2893 / MI 2892 / MI 2885 Measurements , AC+DC Peak voltage: U 12Pk 23Pk 31Pk Measuring range Resolution Accuracy Range 1: 20.00 ÷ 422 Vpk 10 mV, 100 mV ± 0.5 % · U Range 2: 47.0 V ÷ 884.0 Vpk 10 mV, 100 mV ±...

  • Page 218: Current

    MI 2893 / MI 2892 / MI 2885 Measurements 6.2.4 Current Input impedance: 65 kΩ; MI 2893 Input impedance: 100 kΩ; MI 2892/MI 2885 , AC+DC. 10/12 cycle RMS current I 1Rms 2Rms 3Rms NRms Clamps Range Measuring range Overall current accuracy 1000 A 100 A ÷...
  • Page 219 MI 2893 / MI 2892 / MI 2885 Measurements Note: Overall current accuracy (as percent of measured value), is provided as guideline. For exact measuring range and accuracy please check user manual of related current clamps. Overall accuracy is calculated as:...
  • Page 220 MI 2893 / MI 2892 / MI 2885 Measurements Note: Overall current accuracy (as percent of measured value), is provided as guideline. For exact measuring range and accuracy please check user manual of related current clamps. Overall accuracy is calculated as:...

  • Page 221: Frequency

    MI 2893 / MI 2892 / MI 2885 Measurements Note: Overall current accuracy (as percent of measured value), is provided as guideline. For exact measuring range and accuracy please check user manual of related current clamps. Overall accuracy is calculated as:...

  • Page 222: Combined Power

    MI 2893 / MI 2892 / MI 2885 Measurements 6.2.8 Combined power Combined Power Measuring range Accuracy Excluding clamps ±0.2 %  P (Instrument only) With flex clamps A 1227/A 1445/A Active power* 0.000 k ÷ 999.9 M 1501/A 1502 / 3000A ±1.7 % ...

  • Page 223: Nonfundamental Power

    MI 2893 / MI 2892 / MI 2885 Measurements 4 digits With flex clamps Pfund , Pfund , Pfund A 1227/A 1445/A 1501/A 1502 / ±1.7 %  Pfund 3000A A 1446/A 1503 / 6000A With iron clamps ±0.7 %  Pfund...

  • Page 224: Power Factor (Pf, Pfe, Pfv, Pfa)

    MI 2893 / MI 2892 / MI 2885 Measurements Excluding clamps Current distortion power* 0.000 k ÷ 999.9 M (var) (Instrument only) ±2.0 %  D 4 digits > 1%  S , De Excluding clamps Voltage distortion power* 0.000 k ÷ 999.9 M...

  • Page 225: Voltage Harmonics And Thd

    MI 2893 / MI 2892 / MI 2885 Measurements With A 1227/A 1445/A ±1.8 %  Ep 1446/A 1501/A 000,000,000.001 ÷ 999,999,999.999 1502/A 1503 Flex clamps With A 1281/A 1588 ±0.8 %  Ep Multirange iron 000,000,000.001 ÷ 999,999,999.999 clamps With A 1033 ±1.6 % ...

  • Page 226: Voltage Interharmonics

    MI 2893 / MI 2892 / MI 2885 Measurements ± 0.15 %  I < 10 % I 10 mV 0 ÷ 50 50/60Hz ± 5 %  Ih 10 % I < 100 % < Ih 10 mV ± 0.15 %  I <...

  • Page 227: Signalling

    MI 2893 / MI 2892 / MI 2885 Measurements If fundamental voltage frequency is within 16÷33Hz range If fundamental voltage frequency is within 33 ÷ 120Hz 6.2.18 Signalling Measuring range Resolution Accuracy ± 0.15 %  U 1 % U <...

  • Page 228: Phase Angle

    MI 2893 / MI 2892 / MI 2885 Measurements 6.2.23 Phase angle Measuring range Resolution Accuracy -180.0° ÷ 180.0° 0.1° ± 0.6° 6.2.24 400Hz systems specification Sampling frequency: Normal operation 12,2 kSamples/sec Antialiasing filter Passband (-3dB): 0 ÷ 5,7kHz Stopband (-80dB): > 6,44 kHz...

  • Page 229: Recorders

    MI 2893 / MI 2892 / MI 2885 Recorders 6.3 Recorders 6.3.1 General recorder Sampling According to the IEC 61000-4-30 Class A requirements. The basic measurement time interval for voltage, harmonics, interharmonics and unbalance is 10-cycle time interval for a 50 Hz power system and 12-cycle time interval for a 60 Hz power system.

  • Page 230: Waveform/Inrush Recorder

    MI 2893 / MI 2892 / MI 2885 Recorders In this manner a single microSD card with a capacity of 7.566 GB (nominal 8 GB) can save 4 entire recording sessions (each 12 hours long) and an additional 6 hours (all together 4x12 hours + 6 hours, i.e.
  • Page 231 MI 2893 / MI 2892 / MI 2885 Recorders MI 2892/MI 2885: 49 kSamples/s, continuous sampling per channel. All channels are sampled simultaneously. Recording time MI 2893: One cycle period. MI 2892/MI 2885: programmable Pretrigger/Duration... up to 50 periods max.

  • Page 232: Standards Compliance

    MI 2893 / MI 2892 / MI 2885 Standards compliance 6.4 Standards compliance 6.4.1 Compliance to the IEC 61557-12 General and essential characteristics Power quality assessment function Indirect current and direct voltage measurement Classification according to 4.3 Indirect current and indirect voltage...

  • Page 233: Compliance To The To The Iec 61000-4-30

    MI 2893 / MI 2892 / MI 2885 Standards compliance 6.4.2 Compliance to the to the IEC 61000-4-30 MI 2893/MI 2892 IEC 61000-4-30 Section and Parameter Class Measurement 4.4 Aggregation of measurements in time intervals* Timestamp,  aggregated over 150/180-cycle Duration ...

  • Page 234: Maintenance

    MI 2893 / MI 2892 / MI 2885 Maintenance 7 Maintenance 7.1 Inserting batteries into the instrument Make sure that the power supply adapter/charger and measurement leads are disconnected and the instrument is switched off before opening battery compartment cover.

  • Page 235: Batteries

    If the instrument is not going to be used for a long period of time remove all batteries from the battery compartment. The enclosed batteries can supply the instrument for approx. 5 to 7 hours (MI 2892/2885); and 3 to 5 hours (MI 2893) (depends on the battery state, environmental conditions etc).

  • Page 236: Firmware Upgrade

    7.3 Firmware upgrade Metrel as manufacturer is constantly adding new features and enhance existing. In order to get most of your instrument, we recommend periodic check for software and firmware updates. In this section firmware upgrade process is described.

  • Page 237: Upgrade Procedure

    MI 2893 / MI 2892 / MI 2885 Firmware upgrade 7.3.2 Upgrade procedure 1. Connect PC and instrument with USB cable 2. Establish USB communication between them. In PowerView, go to ToolsOptions menu and set USB connection as shown on figure below.
  • Page 238 FW. Click on RUN to proceed. Figure 187: FlashMe firmware upgrade software 7. FlashMe will automatically detect MI 2893/MI 2892/MI 2885 instrument, which can be seen in COM port selection menu. In some rare cases user should point FlashMe manually to COM port...
  • Page 239 8. Instrument upgrade process should begin. Please wait until all steps are finished. Note that this step should not be interrupted; as instrument will not work properly. If upgrade process goes wrong, please contact your distributor or Metrel directly. We will help you to resolve issue and recover instrument.

  • Page 240: Power Supply Considerations

    MI 2893 / MI 2892 / MI 2885 Power supply considerations Figure 189: FlashMe programming screen 7.4 Power supply considerations Warnings  Use only charger supplied by manufacturer.  Disconnect power supply adapter if you use standard (non-rechargeable) batteries. When using the original power supply adapter/charger the instrument is fully operational immediately after switching it on.

  • Page 241: Periodic Calibration

    MI 2893 / MI 2892 / MI 2885 Periodic calibration 7.6 Periodic calibration To ensure correct measurement, it is essential that the instrument is regularly calibrated. If used continuously on a daily basis, a six-month calibration period is recommended, otherwise annual calibration is sufficient.

This manual is also suitable for:

Mi 2892Mi 2885

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