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Multitest-2000
User Manual [en, es]
279 pgs1.76 Mb0
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Amprobe Multitest-2000 User Manual [en, es]

User’ Manual
MultiTest 2000
Release EN 1.00 of the 05/09/2002
© Copyright Amprobe 2002
MULTITEST2000
INDEX
1. SAFETY PRECAUTIONS AND PROCEDURES.......................................................................................... 1
1.1. Forwards................................................ ......................................................................................................................1
1.2. Preliminary Instruction.................... .. ... .. .. ..... .. ... .. .. ... .... ... .. ... .. .. ... .... ... .. .. ... .. .. ..... .. ... .. .. ... .............................................2
1.3. During Use............................................................................................................................. ......................................3
1.4. After Use......................................................................................................................................................................4
2. GENERAL DESCRIPTION........................................................................................................................... 5
2.1. Introduction............................................................................. .....................................................................................5
2.2. Functions.....................................................................................................................................................................5
3. PREPARATION FOR USE.................................................... ....................................................................... 7
3.1. Initial Control................................................................................................................................................................7
3.2. Power Supply..............................................................................................................................................................7
3.3. Calibration...................................................................................................................................................................9
3.4. Storage.................................................................................................................................... ....................................9
4. INSTRUMENT DESCRIPTION... ... .... ... .... ....... .... ... .... ... .... ....... .... ... .... .... ... ....... .... .... ... .... ... ........ ... .... .........11
4.1. Display Description...................................................................... ............................ ................................. .................13
4.2. Initial Screen................................................................................................................................. .............................13
4.3. Backlight function......................................................................................................................................................14
5. INITIAL SETTINGS............................... ..................................................................................................... ..15
5.1. How To Adjust The Contrast........................................................................................................................... ..........15
5.2. How To Set Date And Time ................................ ......................................................................................................15
5.3. How To Set The Language........................................ ...............................................................................................16
5.4. How To Adjust The Country......................................................................................................................................16
5.5. RESET........................................................................... ............................................................................................17
6. SAFETY TEST FUNCTIONS.......................................................................................................................19
6.1. LOWΩ: Continuity Test with 200mA Test Current...................................................................................................19
6.1.1. Calibrating the test leads ("CAL" Mode).........................................................................................................................21
6.1.2. Measurement Procedure................................................................................. .... .... .......................................................24
6.1.3. Results of "AUTO" mode................................................................................................................................................25
6.1.4. Results of "RT+" and "RT-" modes.................................................................................................................................26
6.1.5. "AUTO", RT+", "RT-" faulty cases...................................................................................................................................27
6.2. MΩ: Insula t io n r e s is t a n c e Me a s u re m e n t w i th 5 0 V , 10 0 V , 2 50 V , 5 00 V , 1 0 00 V T e st V o l t a g e...................................... .30
6.2.1. Measurement Procedure................................................................................. .... .... .......................................................30
6.2.2. Results of "MAN" mode..................................................................................................................................................34
6.2.3. Results of "TMR" mode............................................... ..... .................................................... ...........................................36
6.2.4. "MAN" and "TIMER" mode faulty cases................................................... .... .... ...............................................................38
6.3.
6.4. EARTH: Soil Resistance and Resistivity Measurements.........................................................................................44
: Phase Sequence Indicator................................................................................................................................39
6.3.1. Measurement procedure and results of " " mode............................................... .... .... ...............................................39
6.3.2. LOOP Faulty Cases.................................................................................................................................................42
6.4.1. Measurement procedure and results of "2-W"and "3-W" mode....................................................... .... ...........................45
6.4.2. Measurement procedure and results of "ρ" mode......................................................................................... .... .... ....... 48
6.4.3. "2-W", "3-W" and "ρ" faulty cases.................................................................................................................................50
7. AUX: MEASUREMENT WITH EXTERNAL PROBES.................................... .... ... .... ....... .... ... .... ... .... ... .... ..54
7.1. ENVIRONMENTAL PARAMETER AND LEAKAGE CURRENT: REAL TIME MEASUREMENT...........................55
7.2. ENVIRONMENTAL PARAMETER AND LEAKAGE CURRENT: RECORDING.....................................................59
7.2.1. AUX Basic setting: RECORDER CONFIG....................................................................................... ...............................59
7.3. SOUND LEVEL MEASUREMENT PROCEDURE ............. ....................................................... ...............................63
8. ANALYZER .................................................................................................................................................67
8.1. Basic Setting: ANALYZER CONFIG.........................................................................................................................69
8.1.1. Type of electrical system under test...............................................................................................................................69
8.1.2. How to set the fundamental frequency........................................................................................................................... 69
8.1.3. How to set the current range..........................................................................................................................................70
EN-1
MULTITEST2000
8.1.4. How to set the Clamp Type.............................................................................................................................................71
8.1.5. How to set the value of the transformer voltage ratio (TV RATIO).................................................................................71
8.1.6. How to enable/disable the password..............................................................................................................................71
8.2. Basic Setting: RECORDER CONFIG ................................................................ ............................ ...........................73
8.3.
ANALYZER FUNCTIONS.........................................................................................................................................86
8.4. "VOLTAGE" Function................................................................................................................................................88
8.4.1. Symbols.......................................................................................................................................................................... 88
8.4.2. "METER" mode...............................................................................................................................................................89
8.4.3. "HARM" mode.............................................................................. .... ...............................................................................91
8.4.4. "WAVE" mode.................................................................................................................................................................93
8.5. "CURRENT" Function...............................................................................................................................................95
8.5.1. Symbols.......................................................................................................................................................................... 95
8.5.2. “METER" mode...............................................................................................................................................................96
8.5.3. “HARM" mode.................................................................................................................................................................98
8.5.4. "WAVE" mode...............................................................................................................................................................100
8.6. "POWER" Function .................................................................................................................................................102
8.6.1. Symbols........................................................................................................................................................................ 102
8.6.2. "METER" mode.............................................................................................................................................................103
8.6.3. "WAVE" mode...............................................................................................................................................................105
8.7. "ENERGY" Function................................................................................................................................................107
8.7.1. Symbols........................................................................................................................................................................ 107
8.7.2. "METER" mode.............................................................................................................................................................108
8.8. Measuring Procedures............................................... .. ... .... ... .. ... .. .. ... .... ... .. .. ... .. .. ... .... ... .. .. ... ..................................110
8.8.1. Using the Instrument in a Single Phase System........................................................................................................... 110
8.8.2. Using the Instrument in a Three Phase System........................................................................................................... 111
9. SAVING RESULTS.................................................................................. ..................................................113
9.1. Saving Safety Test Results......................................................... ............................................................................113
9.2. Saving DisplAyed Values of ANALYZER Function ............... .................................................................................114
10. RECORDINGS...........................................................................................................................................115
10.1. Start A Recording....................................................................................................................................................115
10.2. During A Recording............................................................................................ .....................................................118
10.2.1. MENU key.....................................................................................................................................................................119
10.2.2. Rotary Switch during a recording.................................................................................................................................. 120
10.3. Stopping A Recording Or An Energy Measurement............................................ .......................... .........................120
11. INSTRUMENT'S MEMORY............................................................................... ........................................122
11.1. SAFETY TEST MEMORY..................................... ... .. .. ..... ... .. .. ... .. ..... .. .. ... .. .. ..... .. ... .. .. ... .... ... .. ... .. ...........................122
11.2. ANALYZER MEMORY............................................................................................................................................124
12. CONNECTING THE INSTRUMENT TO A PC............ ...............................................................................126
13. MAINTENANCE ........................................................................................................................................128
13.1. General Instruction................................................ ... .. .. ... .. ..... .. ... .. .. ... .... ... .. .. ... .. ..... .. .. ... .. .......................................128
13.2. Battery Replacement .................................................................................................................................... ...........128
13.3. Instrument Cleaning................................................................................................................................................129
14. TECHNICAL SPECIFICATIONS ........................................................................ ... .... ... ........ ... .... ... ...........130
14.1. Technical Features..................................................................................................................................................130
14.1.1. Safety Test functions....................................................................................................................................................130
14.1.2. ANALYZER and AUX functions....................................................................................................................................132
14.2. Standards............................................................ ............................ ............................. ...........................................134
14.2.1. General.........................................................................................................................................................................134
14.2.2. Safety Test.................................................................................................................................................................... 134
14.2.3. ANALYZER...................................................................................................................................................................134
14.2.4. AUX ..............................................................................................................................................................................134
14.3. General Specifications................................................. ... .. .. ... ..... .. .. ... .. .. ..... .. ... .. .. ... .... ... .. .. ................................. ....135
14.3.1. Mechanical Data...........................................................................................................................................................135
14.3.2. Power supply................................................................................................................................................................135
14.3.3. Display.......................................................................................................................................................................... 135
14.3.4. Memory.........................................................................................................................................................................135
14.4. ENVIRONMENT.................................................................................................................... ..................................135
14.5. ACCESSORIES ...................................... ............................. ............................ .......................................................137
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15. SERVICE..................................................................................................................................... ..............138
15.1. WARRANTY CONDITIONS............................................ .................................................................................. ......138
15.2. SERVICE............................................................................................................ .....................................................139
16. PRACTICAL REPORTS FOR ELECTRICAL TESTS ............................................... ... .... .... ... .... ... .... ... ....140
16.1. Continuity Test On Protective Conductors .............................................................................................. ...............140
16.2. Check Of The Circuit Separation...................................................................................................................... ......143
16.3. Measurement Of Floor Insulation Resistance In Medical Rooms Cei 64-4...........................................................149
16.5. Earth Resistivity Measurement................................................................... ............................................................153
16.6. Voltage Anomalies (Voltage Sag and Surge)........................ .......................... .......................... .............................156
16.7. Voltage and current Harmonics ................... .. ... .. .. ... .. ... .... ... .. .. ... .. .. ... .. ..... .. .. ... .. .. ... .. ..... .. ... .. .. ... .............................157
16.7.1. Theory........................................................................................................................................................................... 157
16.7.2. Limit values for harmonics............................................................... .... .........................................................................160
16.7.3. Presence of harmonics: causes............................................................................... .... .... .............................................160
16.7.4. Presence of harmonics: consequences............................................... .... .... ................................................................. 161
16.8. Power and Power Factor definition.................................................................. .......................................................162
16.8.1. Conventions on powers and power factors.............................................................. .....................................................166
16.8.2. 3 Phase 3 Wire System.................................................. ..............................................................................................168
16.9. Measuring Method: outlines....................................................................................................................................170
16.9.1. Integration periods.................................................. ...................................................................................................... 170
16.9.2. Power factor calculations..............................................................................................................................................170
17. APPENDIX 1 – MESSAGES DISPLAYED................................................................................................172
18. APPENDIX 2 – RECORDABLE PARAMETERS: SYMBOLS...................................................................174
Z:\bkp\manuali\Sirius - MultiTest\Manuali\M_MultiTest2000_EN1_00.doc
EN-3
MULTITEST2000
1. SAFETY PRECAUTIONS AND PROCEDURES
1.1. FORWARDS
This instrument conforms to the safety standards EN61557 and EN 61010-1 relating to electronic measuring instruments.
ν
WARNING:
Strictly adhere to the following instructions before and during measurements:
Do not measure voltage or current in wet or dusty places; Do not measure in presence of gas, explosive materials or combustibles; Do not touch the circuit under test if no measurement is being taken; Do not touch exposed metal parts, unused terminals, circuits and so on; Do not effect any measurement in case of unusual conditions of the instrument such as
deformation, breakage, leakage of substances, absence of display readi ng etc;
Do not use the External power supply adapter (optional code A0050) if you notice
deformation, or breakage in the case, in the wire or in the plugs;
Pay careful attention when measuring voltages exceeding 25V in particular places
(building yards, swimming pools, etc.) and 50V in ordinary places because of the risk of electric shock;
Use only cables and accessories approved by Amprobe; The following symbols are used in this manual:
Caution: refer to the instructions in this manual; improper use may damage the apparatus or its components.
For your own safety as well as that of the instrument you are recommended to follow the procedures described in this
instruction manual and carefully read all the notes preceded by the symbol
.
Ο
1.2. PRELIMINARY INSTRUCTION
This instrument has been designed for use in environments with a pollution level 2 and
up to (and no more than) 2000 meters altitude.
It can be used for Safety Test on Installation with Over voltage Category III 300V~
(phase to earth) and for voltage and current measurements on installations with over voltage category III 600 V~ phase-to-phase / 300 V~ phase to earth or CATII 350 V phase to earth.
AC Voltage or Current.
Unidirectional pulsating Voltage or Current.
Rotary switch of the instrument.
MULTITEST2000
Please keep to the usual safety standards aimed at:
♦ Protecting against dangerous currents; ♦ Protecting the instrument against incorrect operations.
Only the accessories supplied with the instrument guarantee compliance with the
safety standards. Accordingly, they must be in good conditions and, if necessary, they must be replaced with identical models.
Do not take measurements on circuits exceeding the specified current and voltage
limits.
Before connecting cables, alligator clips and clamps to the circuit under test, make sure
that the right function has been selected.
Do not take any measurements under environmental conditions beyond the limits
specified in paragraph 14.4.
Check that batteries are not weak and are installed correctly. Before connecting test leads to the circuit under test, check that rotary switch position
is correct.
1.3. DURING USE
Please read the following recommendations carefully and instructions:
MULTITEST2000
ν
WARNING:
Before selecting any function disconnect the test leads from the circuit under test. When the instrument is connected to the circuit under test do not touch any unused
terminal.
Avoid taking resistance measurements in the presence of external voltages; even
though the instrument is protected, a high voltage may cause malfunctions.
When measuring current, other currents located near the leads may affect the
measuring accuracy.
Non-compliance with the Warnings and/or Instructions may damage the apparatus and/or its components or injure the
operator.
When measuring current, always position the wire in the middle of the jaws in order to
obtain the highest accuracy.
A measured value remains constant if the "HOLD" function is active. Should you notice
that the measured value remains unchanged, disable the “HOLD” function.
ν
WARNING:
1.4. AFTER USE
• After use, turn off the instrument by pressing & holding ON/OFF for a few seconds.
• Remove batteries wh en the apparatus remain s unused for long periods. Plea se follow
the storage instructions described at paragraph 14.4.
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The symbol " " shows the battery charge: When it is completely black the batteries are full charged, while the "
symbol indicates weak batteries. When the batteries are too low to execute a test, the instrument will show a warning message. In this case, interrupt testing and replace batteries, following the procedure described in paragraph 13.2. The instrument is
capable of keeping the data stored even though batteries are not installed. The Instrument Date and Time settings aren't lost if you change the batteries within 24hours.
"
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2. GENERAL DESCRIPTION
2.1. INTRODUCTION
Dear Customer, we thank yo u for you r patrona ge . The instrume nt you ha ve ju st purch ased will grant you accurate and reliable measurements provided that it is used according to the present manual’s instructions. The instrument was designed to grant the user the utmost safety conditions thanks to a new concept assuring double insulation and over voltage category III.
2.2. FUNCTIONS
The instrument is able to perform the following tests: LOWΩ: Continuity Test of Protection and Equalising conductors with a test current
higher than 200mA and open circuit volt age ranging from 4V to 24V.
MΩ: Measurement of insulation resistance with DC test voltage 50V, 100V,
250V, 500V or 1000V.
: Indication of phase rotation sequence
EARTH Measurement of Earth Resistance and Resisivity using Earth rods.  AUX: Measurement and Recording of leakage current or environmental values
(temperature, humidit y, Air Speed, Luminance a nd Sound lev el).
ANALYZER: The Instrument allows the followin g operations:
Display in real time the electrical parameters of a single-phase
systems and the harmonic analysis of voltage and current.
Conduct a direct Energy measurement (without memorizing).  Memorize (by pressing the SAVE key) the sampled values of the
Parameters present at instrument input generating a "Smp" record inside instrument memory. It will be possible to analyze the memorized data ONLY by transferring it to a PC.
Record simultaneously (pressing the START key after a proper set
up): RMS values of voltage, current, corresponding harmonics, active, reactive and apparent powers, power factors and cosϕ, active, reactive and apparent energies, voltage anomalies (voltage sag and surge) with 10ms resolution. It will be possible to analyze the recorded data ONLY by transferring them to a PC.
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CAUTION
Please note the difference between memorize and record. These terms will be used repeatedly in this manual. Please focus on their de finitions and distinctions.
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3. PREPARATION FOR USE
3.1. INITIAL CONTROL
This instrument has been checked mechanically and electrically prior to shipment. Care has been taken to ensure that the instrument reaches you under safe conditions.
You are recommended, however, to carry out a rapid check to detect any possible damage, which might have been caused during transport. Should this be the case, immediately contact Amprobe.
Also, check that the packagi ng contains all the parts listed und er paragraph 14.5. In case of discrepancies contact the dealer.
In case you have to send the instrument back please follow the instructions reported in paragraph 15.
3.2. POWER SUPPLY
The instru ment can be pow e red by:
6 batteries 1.5V AA series located in the compartment on the back of the instrument (not included in the package). For battery life see paragraph 14. 3.1.
An external power supply adapter (optional code A0050) to be used only for ANALYSIS and AUX functions. We recommend that you use only A0050 HT Power
Supply adapter.
For your own safety you’re not able to use the external power supply adapter during Safety Test (LOWΩ, MΩ,
button the Instrument will show the message "ν REMOVE POWER".
The symbol
shows the battery charge: If it is completely "black" the batteries are fully charged, while the low to execute the test the instrument will show a warning message. In this case interrupt
,EARTH rotary Switch positions). If you press the START
symbol indicates weak batteries. When the batteries are too
MULTITEST2000
testing and replace the batteries following the procedure described in paragraph 13.2. The
instrument is capable of keeping the data sto red eve n though batte ries are not insta lle d. The Instrument Date and Time settings aren't lost if you change the batteries within 24hours.
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CAUTION
For recordings (ANALYSIS and AUX function) ALWAYS use the external power supply adapter (optional code A0050) even the instrument allows the operator to perform a recording using internal batteries. If during a recording the external power supply adapter is de-energized, the instrument will continue the recording using the internal battery power until the batteries are exhausted (the data stored up to the point the instrument shuts down won’t get lost). Because of this we recommend you ALWAYS insert a new set of batteries before a long recording.
The instru ment uses soph i sticated al gorithms to prolong the battery life. Specifically:
The instrument switches OFF the backlight Automatically after 5 seconds. If the instrument is displaying in real time (and the external power supply adapter is not
connected), after about 5 minutes from the last key press or switch rotation the instrument turns off automatically ("AUTOPOWER OFF" procedure).
If the instrument is recording or is measuring energy (and the external power supply is
not connected), after about 5 minutes from the last key press or switch rotation the instrument starts a special procedure to save the batteries ("ECONOMY MODE"): the instrument keeps recording but the display is turned off.
3.3. CALIBRATION
The instrument fulfils the technical specifications listed in this manual. The performance of the specifications is guaranteed for one year.
3.4. STORAGE
In order to maintain the accuracy of the measurements, after a period of storage in extreme environmental conditions, wait the necessary time for the apparatus to return to normal operating conditions (see environmental specifi cations listed in parag rap h 14.4).
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4. INSTRUMENT DESCRIPTION
LEGEND:
1
2
F1 F3F4F2
1.
Display Function Keys
2.
3.
Rotary swit ch
F1
ON
START
3
F2 F4 F3
/
OFF
STOP
START STOP
HOLD
SAVE
ENT ER
MENU ESC
Front panel of the Instrument
Multifunction Keys.
ON/OFF and backlight key. Press it for few seconds to switch OFF the
instrument, press it briefly to activate the backlight function.
This key starts (and stops) the measurements.
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This key saves the result displayed.
SAVE
HOLD
ENTER
This key has 2 functions: it is the confirmation key inside the
configuration menu and it freezes the displayed results using the ANALYZER function.
MENU
This key opens the General Configuration Menu.
ESC
This key cancels modification in the configuration menus or the selected
working modes.
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4.1. DISPLAY DESCRIPTION
The display is a graphic module with a resolution of128 x 128 pixels The first line of the display shows date and time. If not correct, you can set the exact ones according to the procedure described at paragraph 5.2. On the top right corner of the display you can always see the battery indicator and, if the external power supply adapter (optional code A0050) is connected, the corresponding symbol.
LOWΩ 05.06.01
----Ω
R+ R-
----Ω ----Ω
---mA ---mA
AUTO 0.11Ω
FUNC CAL
27.09.00 17:35:12
SINGLE PHASE
V1 = 230.2 V Vpk1 = 325.5 V ThdV = 0.0 % freq = 50.0 Hz
HARM WAVE
VOLTAGE
These symbols will be omitted in the following illustrations.
4.2. INITIAL SCREEN
When turning on the instrument by pressing ON/OFF, this screen will appear for a few seconds:
MT 2000
AMPROBE
SN:00000000 V: X.XX
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BAUD RATE 57600
Here you can see:
• Serial number of the instrument (SN.:)
• Firmware software release (V.X.XX:)
• Transmission speed through serial RS232 (Baud Rate)
4.3. BACKLIGHT FUNCTION
When the instrument is turned on, pressing, briefly, the ON/OFF button, the backlight will be enabled. The light will be automatically turned off after 5 seconds. If the batteries are too low the instrument will automatically disable the backlight function.
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5. INITIAL SETTINGS
By pressing the MENU key the following screen will be displayed:
It’s not possible to enter the MENU during a recording or a Real Time Energy measurement. Pressing this button during a recording will display the main recording parameters (see paragraph 10.2).
5.1. HOW TO ADJUST THE CONTRAST
By pressing the multifunction keys F1 and F2, position the cursor on the CONTRAST item and then press the ENTER key. By pressing the multifunction keys F3 and F4, adjust the contrast (higher values correspond to a higher contrast while lower values correspond to a lower contrast) and press the ENTER key to SAVE the change or press ESC to quit the modification. This setting will remain unchanged after turning off the instrument.
5.2. HOW TO SET DATE AND TIME
By pressing the multifuncti on keys F1 and F2, position the cursor on the DATE&TIME item and then press the ENTER key. The time is expressed as hh:mm (2 digit for hours, 2 digit for minutes) military time. Press the ENTER key to SAVE the change or press ESC to quit the modification. This setting will remain unchanged after turning off the instrument.
MENU GENERAL
SAFETY TEST MEMORY
ANALYZER MEMORY RESET
ANALYZER CONFIG RECORDER CONFIG
CONTRAST DATE&TIME LANGUAGE COUNTRY
↓ ↑
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5.3. HOW TO SET THE LANGUAGE
By pressing the multifunction keys F1 and F2, position the cursor on the LANGUAGE (EN) or LINGUA (IT) item and confirm it by pressing the ENTER key. By pressing the multifunction keys F1 and F2, position the cursor on the desired language and press the ENTER key to SAVE the change or press ESC to cancel the modification. This setting will remain unchanged after turning off the instrument.
5.4. HOW TO ADJUST THE COUNTRY
By pressing the multifunction keys F1 and F2, position the cursor on the COUNTRY item and confirm it by pressing the ENTER key. By pressing the multifunction keys F1 and F1, select the Country among the following possibilities:
UE_m: European Countries: Distance setting in "meter" for Resistivity measurement US_m: United States: Distance setting in "meter" for Resistivity measurement US_ft: United States: Distance setting in "feet" for Resistivity measurement
Press the ENTER key to SAVE the change or press ESC to quit the modification. This setting will remain unchanged after turning off the instrument.
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5.5. RESET
This option re-establishes the default settings of the instrument. The default settings of the instrument consist of: ANALYZER CONFIG:
Full scale of the clamps: 1000A Transformer ratio: 1 Type of electrical equipment: 4 wires Password: enabled
RECORDER CONFIG:
Start: Manual (the recording is started at 00 sec mark on clock after pressing the START/STOP key) Stop: Manual Integration period: 15min Recording o f harmonics: ON Recording of Voltage anomalies (Sag and Surge: ON Voltage Reference for Sag and Surge detection: 230V Upper Limit for Sag and Surge detection: 6% Lower Limit for Sag and Surge detection: 10% Selected vo ltages: V1 Selected voltage harmonics: THD, 01, 03, 05, 07 Selected currents: I1 Selected current harmonics: THD, 01 , 03, 05, 07 CO-GENERATION: OFF Powers, Pf and c osϕ selected: P1 Q1i Q1c S1 Pf1 dpf1 Energies: Ea1 Eri1 Erc1
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The RESET command will not erase the instrument’s memory.
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6. SAFETY TEST FUNCTION S
6.1. LOWΩ: CONTINUITY TEST WITH 200mA TEST CURRENT
The measurement is taken according to EN 61557-2 and VDE 0413 part 4.
ν
WARNING:
Turn the rotary knob to the LOWΩ position.
This key allows the operator to select one of the following measuring modes: AUTO mode (the instrument carries out two measurements with reversed
polarity and displays their average value). This mode is recommended for the continuity test.
RT+ mode (measurement with positive polarity and the ability to set the
duration time of the test). In this case the operator can set a measuring time long enough to permit them to move the protective conductors while the instrument is carrying out the test so as to detect any bad connections.
RT- mode (measurement with negative polarity and the ability to set th e
duration time of the test). In this case the operator can set a measuring time long enough to permit him to move the protective conductors while the instrument is carrying out the test so as to detect any bad connection.
This key permits the operator to perform a calibration (compensation for the resistance of the cables used for the measurement).
Before carrying out the continuity test be sure that there is no voltage at the ends of the conductor under test.
N.B.
If the resistance is lower than 5Ω (including the resistance of the calibration) the
continuity test is executed by the instrument with a test current higher than 200mA.
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If the resistance is higher than 5Ω the continuity test is executed by the instrument with a current lower than 200mA.
We recommend that you check the calibration of the test leads before executing a measurement according to next paragraph.
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6.1.1. Calibrating the test leads ("CAL" Mode)
1. Connect the black and blue test leads to B1 and B4 input terminals respectively.
B2 B3
B4B1
Connection of instrument terminals during calibration procedure.
2. If the test leads supplied with the instrument are not long enough for the measurement yo u can ex tend t he blue ca ble.
3. Short-ci r c u i t the measuring cable ends making sure that the condu ctive parts of the alligator clips make good contact with each other (see previous picture).
4. Press th e F2 key. The instrument performs the calibration.
ν
ATTENTION:
Never disconnect the test leads when the message "MEASURING" is displayed.
LOWΩ 05.06.01
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----Ω
R+ R-
----Ω ----Ω
---mA ---mA
AUTO 0.11Ω
FUNC CAL
A numerical value in this field means that the instrument has been calibrated; this value remains on
the display for any further measurement
even though the unit is switched off and on again.
5. At the end of the test the result is stored and used as OFFSET (that is to say that it is subtracted from any continuity test carried out) for all the subsequent measurements.
Note
: The instrument performs the calibration only if the resistance of the test leads is
lower than 5Ω.
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TEST LEADS Before each measurement always assure that the
calibration is for the cables in use. During a continuity test, if the resistance value free of calibration (that is the resistance value less the calibration offset value) is negative, the symbolν is displayed. Probably the calibration resistance value stored in the instrument memory is not for the cables in use, therefore a new calibration must be performed.
6.1.1.1. Procedure to reset test leads calibration parameters
To cancel calibration parameters it is necessary to perform a
calibration procedure with a resistance of test leads higher than 5Ω (for example with
open test leads). When a cancellation is effected
the screen to the right
is displayed temporarily.
LOWΩ 05.06.01
ν
>
99.9
R+ R-
----Ω ----Ω
---mA ---mA
AUTO 0.11Ω
FUNC CAL
Ω
Message >99.9Ω: means that the instrument detected a resistance higher than 5Ω therefore it will proceed with Reset proced ure.
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6.1.2. Measurement Procedure
1. Select the desired mode using the F1 key.
2. Connect the black and blue test leads to B1 and B4 input terminals respectively
START
STOP
B2 B3
B4B1
Connection of the test leads during LOWΩ test.
3. If the cables su ppli e d with the instrument are not long enough for the measurement you can extend the blue cable.
4. Short-circuit the test leads making sure that the conductive parts of the alligator clips make a good contact to each other. Press the START key. If the display doesn't show 0.00Ω repeat the test leads calibration (see paragraph 6.1.1).
5. Connect the instrument terminals to the ends of the conductor under test (see previous picture).
6. If the mode "RT+" or "RT-" was selected use the F3, F4 keys to set the duration of the test.
7. Press the START key. The instrument will execute the measurement. In RT+/RT- (Timer mode) you can press START key again if you want to stop the test before the duration set is expir ed.
ν
WARNING:
Never disconnect the test leads when the message "Measuring" is displayed.
A
MULTITEST2000
6.1.3. Results of "AUTO" mode
t the end of the test, if
the average resistance
value Ravg than 5Ω the instrument emits a double sound signal indicating the positive outcome of the test and displays a
screen similar to the screen to the right.
is lower
LOWΩ 05.06.01
1.05Ω
R+ R-
1.07Ω 1.03Ω 219mA 219mA
AUTO 0.11Ω
FUNC CAL
Average resistance value (Ravg)
Resistance values and corresponding test currents obtained after exchanging the polarities of test leads
The displayed result can be stored by pressing the SAVE key twice (refer to
paragraph 9.1).
MULTITEST2000
6.1.4. Results of "RT+" and "RT-" modes
If a resistance value
or RT- lower than
RT+ 5Ω is detected, the
instrument emits a
double sound signal indicating the positive outcome of the test
displays a screen similar to the screen to the right.
LOWΩ 05.06.01
1.07Ω
219mA
RT+ 0.11Ω TIME: 10s
FUNC CAL
↑ ↓
Max Resistance value of R+ or R-.
Test current
Duration of the Test
Note: We recommend the use of alligator clips and to assure the alligator clips make good
contact with the conductor under test. Indeed , in this test the instrument gives as a final result the maximum measured value of R+ or R- and using test leads instead of alligator clips could give you faulty results due to faulty contact between the test leads and conductor under test
The displayed result can be stored by pressing the SAVE key twice (refer to
paragraph 9.1).
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