Amprobe DMIII User Manual
DMIII MultiTest
User’s Manual
Copyright Amprobe 2005
AMPROBE
DMIII MULTITEST
EN-1
INDEX
1. SAFETY PRECAUTIONS AND PROCEDURES .......................................................................................... 4
1.1. Forwards .................................................................................................................................................................. 4
1.2. Preliminary Instruction ............................................................................................................................................. 4
1.3. During Use ............................................................................................................................................................... 5
1.4. After Use .................................................................................................................................................................. 5
2. GENERAL DESCRIPTION ........................................................................................................................... 6
2.1. Introduction .............................................................................................................................................................. 6
2.2. Functions ................................................................................................................................................................. 6
3. PREPARATION FOR USE ........................................................................................................................... 7
3.1. Initial Control ............................................................................................................................................................ 7
3.2. Power Supply ........................................................................................................................................................... 7
3.3. Calibration ................................................................................................................................................................ 8
3.4. Storage .................................................................................................................................................................... 8
4. INSTRUMENT DESCRIPTION ..................................................................................................................... 9
4.1. Display Description ................................................................................................................................................ 10
4.2. Initial Screen .......................................................................................................................................................... 10
4.3. Backlight function ................................................................................................................................................... 10
5. INITIAL SETTINGS ......................................................................................................................................11
5.1. How To Adjust The Contrast .................................................................................................................................. 11
5.2. How To Set Date And Time ................................................................................................................................... 11
5.3. How To Set The Language .................................................................................................................................... 11
5.4. How To Adjust The Country ................................................................................................................................... 11
5.5. RESET ................................................................................................................................................................... 12
6. SAFETY TEST FUNCTIONS .......................................................................................................................13
6.1. LOW: Continuity Test with 200mA Test Current ................................................................................................. 13
6.1.1. Calibrating the test leads ("CAL" Mode) ..........................................................................................................................14
6.1.2. Measurement Procedure .................................................................................................................................................16
6.1.3. Results of "AUTO" mode .................................................................................................................................................17
6.1.4. Results of "RT+" and "RT-" modes ..................................................................................................................................17
6.1.5. "AUTO", RT+", "RT-" faulty cases ....................................................................................................................................19
6.2. INSULATION TEST: Insulation Resistance Measurement ....................................................................................... 21
6.2.1. Measurement Procedure .................................................................................................................................................21
6.2.2. Results of "MAN" mode ...................................................................................................................................................23
6.2.3. Results of "TMR" mode ....................................................................................................................................................24
6.2.4. "MAN" and "TIMER" mode faulty cases ...........................................................................................................................25
: Phase Sequence Indicator ............................................................................................................................. 26
6.3.
6.3.1. Measurement procedure and results of " " mode .......................................................................................................26
Faulty Cases ............................................................................................................................................................28
6.3.2.
6.4. GROUND TEST: Soil Resistance and Resistivity Measurements ......................................................................... 30
6.4.1. Measurement procedure and results of "2-W"and "3-W" mode .......................................................................................30
7. POWER QUALITY .......................................................................................................................................36
7.1. Basic Setting: ANALYZER CONFIG ...................................................................................................................... 37
7.2. Basic Setting: RECORDER CONFIG..................................................................................................................... 39
7.3. POWER QUALITY FUNCTIONS ........................................................................................................................... 46
6.4.2. Measurement procedure and results of "" mode .........................................................................................................32
6.4.3. "2-W", "3-W" and "" faulty cases ..................................................................................................................................34
7.1.1. Type of electrical system under test ................................................................................................................................37
7.1.2. How to set the fundamental frequency ............................................................................................................................37
7.1.3. How to set the Clamp Type..............................................................................................................................................38
7.1.4. How to set the current range............................................................................................................................................38
7.1.5. How to set the value of the transformer voltage ratio (TV RATIO) ..................................................................................38
7.1.6. How to enable/disable the password ...............................................................................................................................38
AMPROBE
DMIII MULTITEST
EN-2
7.4. "VOLTAGE" function .............................................................................................................................................. 47
7.4.1. Symbols ...........................................................................................................................................................................47
7.4.2. "METER" mode ................................................................................................................................................................48
7.4.3. "HARM" mode ..................................................................................................................................................................49
7.4.4. "WAVE" mode ..................................................................................................................................................................51
7.5. "CURRENT" function ............................................................................................................................................. 52
7.5.1. Symbols ...........................................................................................................................................................................52
7.5.2. “METER" mode ................................................................................................................................................................53
7.5.3. “HARM" mode ..................................................................................................................................................................54
7.5.4. "WAVE" mode ..................................................................................................................................................................56
7.6. "POWER" function ................................................................................................................................................. 57
7.6.1. Symbols ...........................................................................................................................................................................57
7.6.2. "METER" mode ................................................................................................................................................................58
7.6.3. "WAVE" mode ..................................................................................................................................................................60
7.7. "ENERGY" function ................................................................................................................................................ 61
7.7.1. Symbols ...........................................................................................................................................................................61
7.7.2. "METER" mode ................................................................................................................................................................62
8. MEASURING PROCEDURES .....................................................................................................................63
8.1. Using the instrument in a single-phase system ...................................................................................................... 63
8.2. Using the Instrument in a three-phase 4-wire system ............................................................................................ 64
8.3. Using the Instrument in a three-phase 3-wire system ............................................................................................ 65
9. SAVING RESULTS ......................................................................................................................................67
9.1. Saving Safety Test Results .................................................................................................................................... 67
9.2. Saving Displayed Values of POWER QUALITY Function ...................................................................................... 67
10. RECORDINGS .............................................................................................................................................68
10.1. Start A Recording ................................................................................................................................................... 68
10.2. During A Recording ................................................................................................................................................ 70
10.2.1. MENU key ........................................................................................................................................................................70
10.2.2. Rotary Switch during a recording .....................................................................................................................................71
10.3. Stopping a Recording / Energy Measurement ....................................................................................................... 71
11. INSTRUMENT'S MEMORY .........................................................................................................................72
11.1. SAFETY TEST MEMORY ...................................................................................................................................... 72
11.2. ANALYZER MEMORY ........................................................................................................................................... 73
12. CONNECTING THE INSTRUMENT TO A PC .............................................................................................74
13. MAINTENANCE...........................................................................................................................................75
13.1. General Instruction ................................................................................................................................................. 75
13.2. Battery Replacement ............................................................................................................................................. 75
13.3. Instrument Cleaning ............................................................................................................................................... 75
14. TECHNICAL SPECIFICATIONS .................................................................................................................76
14.1. Technical Features ................................................................................................................................................ 76
14.1.1. Safety Test functions .......................................................................................................................................................76
14.1.2. POWER QUALITY function .............................................................................................................................................77
14.2. Standards .............................................................................................................................................................. 78
14.2.1. General ............................................................................................................................................................................78
14.2.2. Safety Test .......................................................................................................................................................................78
14.2.3. POWER QUALITY ...........................................................................................................................................................78
14.3. General Specifications ........................................................................................................................................... 79
14.3.1. Mechanical Data ..............................................................................................................................................................79
14.3.2. Power supply ...................................................................................................................................................................79
14.3.3. Display .............................................................................................................................................................................79
14.3.4. Memory ............................................................................................................................................................................79
14.4. ENVIRONMENT .................................................................................................................................................... 79
14.5. ACCESSORIES ..................................................................................................................................................... 80
15. SERVICE .....................................................................................................................................................81
15.1. WARRANTY CONDITIONS ................................................................................................................................... 81
15.2. SERVICE ............................................................................................................................................................... 81
16. PRACTICAL REPORTS FOR ELECTRICAL TESTS .................................................................................82
AMPROBE
DMIII MULTITEST
EN-3
16.1. Continuity Test On Protective Conductors ............................................................................................................. 82
16.2. Check of the Circuit Separation ............................................................................................................................. 83
16.3. Measurement Of Floor Insulation Resistance In Medical Rooms Cei 64-4 ............................................................ 86
16.4. Ground Resistance Measurement ......................................................................................................................... 88
16.5. Ground Resistivity Measurement ........................................................................................................................... 89
16.6. Voltage Anomalies (Voltage Sag and Surge) ......................................................................................................... 91
16.7. Voltage and current Harmonics ............................................................................................................................. 91
16.7.1. Theory ..............................................................................................................................................................................91
16.7.2. Limit values for harmonics ...............................................................................................................................................93
16.7.3. Presence of harmonics: causes .......................................................................................................................................93
16.7.4. Presence of harmonics: consequences ...........................................................................................................................94
16.8. Power and Power Factor definition ........................................................................................................................ 94
16.8.1. Conventions on powers and power factors ......................................................................................................................96
16.8.2. 3 Phase 3 Wire System ...................................................................................................................................................97
16.9. Measuring Method: outlines ................................................................................................................................... 98
16.9.1. Integration periods ...........................................................................................................................................................98
16.9.2. Power factor calculations .................................................................................................................................................98
16.9.3. Voltage Anomalies and Periods Analysis comparison .....................................................................................................98
17. APPENDIX 1 – MESSAGES DISPLAYED ................................................................................................100
18. APPENDIX 2 – RECORDABLE PARAMETERS: SYMBOLS ...................................................................101
Release EN 1.00 of the 31/06/2005
AMPROBE
DMIII MULTITEST
WARNING
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 .
Caution: refer to the instructions in this manual; improper use may damage the
apparatus or its components.
AC Voltage or Current.
Unidirectional pulsating Voltage or Current.
Rotary switch of the instrument.
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.
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 reading etc;
Do not use the External power supply adapter (code DMT-EXTPS) 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:
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.
EN-4
AMPROBE
DMIII MULTITEST
WARNING
Non-compliance with the Warnings and/or Instructions may damage the
apparatus and/or its components or injure the operator.
WARNING
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.
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:
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.
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.
1.4. AFTER USE
After use, turn off the instrument by pressing & holding ON/OFF for a few seconds.
Remove batteries when the apparatus remains unused for long periods. Please follow
the storage instructions described at paragraph 14.4.
EN-5
AMPROBE
DMIII MULTITEST
WARNING
Please note the difference between memorize and record. These terms
will be used repeatedly in this manual. Please focus on their definitions and
distinctions.
2. GENERAL DESCRIPTION
2.1. INTRODUCTION
Dear Customer, we thank you for your patronage. The instrument you have just purchased
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:
LOW: Continuity Test of Protection and Equalising conductors with a test
current higher than 200mA and open circuit voltage ranging from 4V to
24V.
INSULATION TEST: Measurement of insulation resistance with DC test voltage 50V, 100V,
250V, 500V or 1000V.
: Indication of phase rotation sequence
GROUND TEST Measurement of Ground Resistance and Resistivity using Earth rods.
POWER QUALITY: The Instrument allows the following operations:
Display in real time the electrical parameters of a single-phase
and three-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 voltages, currents, corresponding
harmonics, active, reactive and apparent powers, power factors
and cos, 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.
EN-6
AMPROBE
DMIII MULTITEST
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 packaging contains all the parts listed under 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 instrument can be powered 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 14.3.2.
An external power supply adapter (code DMT-EXTPS) to be used only for
POWER QUALITY functions. We recommend that you use only DMT-EXTPS
Amprobe Power Supply adapter.
For your own safety you’re not able to use the external power supply adapter during
Safety Test (LOW, INSULATION TEST, ,GROUND TEST rotary Switch positions).
If you press the START button the Instrument will show the message " REMOVE
POWER".
The symbol shows the battery charge: If it is completely "black" the batteries are
fully charged, while the symbol indicates weak batteries. When the batteries are too
low to execute the test the instrument will show a warning message. In this case interrupt
testing and replace the 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.
EN-7
AMPROBE
DMIII MULTITEST
WARNING
For recordings (POWER QUALITY function) ALWAYS use the external
power supply adapter (code DMT-EXTPS) 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 instrument uses sophisticated algorithms 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 specifications listed in paragraph 14.4).
EN-8
AMPROBE
SAVE
F1 F3
F4
F2
HOLD
ENTER
MENU ESC
START
STOP
1
2
3
LEGEND:
1. Display
2. Function Keys
3. Rotary switch
F1
START
STOP
HOLD
ENTER
MENU
F2
F4
F3
ON
/
OFF
SAVE
ESC
4. INSTRUMENT DESCRIPTION
DMIII MULTITEST
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.
This key saves the result displayed.
This key has 2 functions: it is the confirmation key inside the
configuration menu and it freezes the displayed results using the
POWER QUALITY function.
This key opens the General Configuration Menu.
This key cancels modification in the configuration menus or the selected
working modes.
EN-9
AMPROBE
DMIII MULTITEST
LOW 05.06.01
27.09.00 17:35:12
----
R+ R-
---- ----
---mA ---mA
AUTO 0.11
SINGLE PHASE
VOLTAGE
V1 = 230.2 V
Vpk1 = 325.5 V
ThdV = 0.0 %
freq = 50.0 Hz
FUNC
CAL
HARM
WAVE
DMIII
Multitest
AMPROBE
SN:00000000 V: X.XX
BAUD RATE 57600
4.1. DISPLAY DESCRIPTION
The display is a graphic module with a resolution of 128 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 (code DMT-EXTPS) is connected, the corresponding
symbol.
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:
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.
EN-10
AMPROBE
MENU GENERAL
SAFETY TEST MEMORY
ANALYZER MEMORY
RESET
ANALYZER CONFIG
RECORDER CONFIG
CONTRAST
DATE&TIME
LANGUAGE
COUNTRY
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 multifunction 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.
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
Date format DD/MM/YY
US_m: United States: Distance setting in "meter" for Resistivity measurement
Date format MM/DD/YY
US_ft: United States: Distance setting in "feet" for Resistivity measurement
Date format MM/DD/YY
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.
DMIII MULTITEST
EN-11
AMPROBE
DMIII MULTITEST
5.5. RESET
This option re-establishes the default settings of the instrument.
ANALYZER CONFIG:
Type of electrical equipment: Three Phase 4 wires
Frequency: not modified
Clamp full scale: not modified
Clamp type: not modified
Transforming ratio of voltmetric transformers: 1
Password: disabled
RECORDER CONFIG:
Start: manual (the recording is started
at 00 sec mark on clock after pressing
START/STOP)
Stop: manual
Integration period: 15min
Recording of harmonics: ON
Recording of voltage anomalies (sags and surges): ON
Voltage reference for detection of sags and surges: 110V
Upper limit for detection of sags and surges: 6%
Lower limit for detection of sags and surges: 10%
Selected voltages: V1, V2, V3
Selected voltage harmonics: THD, 01, 03, 05, 07
Selected currents: I1, I2, I3, IN
Selected current harmonics: THD, 01, 03, 05, 07
CO-GENERATION: OFF
Selected powers, Pf and cos: Pt, P1, P2, P3
Qti, Q1i, Q2i, Q3i
Qtc, Q1c, Q2c, Q3c
St, S1, S2, S3
Pft, Pf1, Pf2, Pf3
dpft, dpf1, dpf2, dpf3
Energies: Eat, Ea1, Ea2, Ea3
Erit, Eri1, Eri2, Eri3
Erct, Erc1, Erc2, Erc3
Est, Es1, Es2, Es3
The RESET command will not erase the instrument’s memory.
EN-12
AMPROBE
DMIII MULTITEST
WARNING
Before carrying out the continuity test be sure that there is no voltage at the ends
of the conductor under test.
6. SAFETY TEST FUNCTIONS
6.1. LOW: CONTINUITY TEST WITH 200mA TEST CURRENT
The measurement is taken according to EN 61557-2 and VDE 0413 part 4.
Turn the rotary knob to the LOW 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 the
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).
N.B. If the resistance is lower than 5 (including the resistance of the calibration) the
continuity test is executed by the instrument with a test current higher than 200mA.
If the resistance is higher than 5 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.
EN-13
AMPROBE
DMIII MULTITEST
T1 T2 T3
T4
I1 I2 I3
(V1) (V2) (V3)
(COM)
WARNING
Never disconnect the test leads when the message "MEASURING" is
displayed.
LOW 05.06.01
A numerical value
----
R+ R-
---- ----
---mA ---mA
AUTO 0.11
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.
FUNC
CAL
6.1.1. Calibrating the test leads ("CAL" Mode)
1. Connect the black and yellow test leads to T1 and T4 input terminals
respectively.
Connection of instrument terminals during calibration procedure.
2. If the test leads supplied with the instrument are not long enough for the
measurement you can extend the black cable.
3. Short-circuit the measuring cable ends making sure that the conductive parts of the
alligator clips make good contact with each other (see previous picture).
4. Press the F2 key. The instrument performs the calibration.
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 5.
EN-14
AMPROBE
DMIII MULTITEST
To cancel calibration
parameters it is
necessary to perform a
calibration procedure
with a resistance of
test leads higher than
5 (for example with
open test leads). When
a cancellation is effected
the screen to the right
is displayed temporarily.
LOW 05.06.01
Message >99.9:
means that the
instrument detected a
resistance higher
than 5 therefore it
will proceed with
Reset procedure.
>99.9
R+ R-
---- ----
---mA ---mA
AUTO 0.11
FUNC
CAL
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 symbol
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
EN-15
AMPROBE
DMIII MULTITEST
T1 T2
T3 T4
I1 I2 I3
(V1) (V2) (V3)
(COM)
ATTENTION
Never disconnect the test leads when the message "Measuring" is
displayed.
START
STOP
6.1.2. Measurement Procedure
1. Select the desired mode using the F1 key.
2. Connect the black and yellow test leads to T1 and T4 input terminals
respectively
Connection of the test leads during LOW test.
3. If the cables supplied with the instrument are not long enough for the measurement
you can extend the black 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 0.00 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 expired.
EN-16
AMPROBE
DMIII MULTITEST
At the end of the test, if
the average resistance
value Ravg is lower
than 5 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.
LOW 05.06.01
Average resistance value
(Ravg)
1.05
R+ R-
1.07 1.03
219mA 219mA
AUTO 0.11
Resistance values and
corresponding test currents
obtained after exchanging
the polarities of test leads
FUNC
CAL
If a resistance value
RT+ or RT- lower than
5 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.
LOW 05.06.01
Max Resistance value of
R+ or R-.
1.07
219mA
RT+ 0.11 TIME: 10s
Test current
Duration of the Test
FUNC
CAL
6.1.3. Results of "AUTO" mode
The displayed result can be stored by pressing the SAVE key twice (refer to
paragraph 9.1).
6.1.4. Results of "RT+" and "RT-" modes
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).
EN-17
AMPROBE
DMIII MULTITEST
EN-18
AMPROBE
DMIII MULTITEST
If the instrument detect
the External Power
supply adapter
connected to instrument
will show the message
displayed to the right.
LOW 05.06.01
-
.- -
R+ R-
--- ---
---mA ---mA
REMOVE POWER
AUTO 0.11
Disconnect the External
Power Supply Adapter
FUNC
CAL
If the terminal voltage is
higher than 15V, the
instrument does not
perform the test and
displays the screen to
the right for 5 seconds.
LOW 05.06.01
-.- -
R+ R-
-.-- -.--
---mA ---mA
VOLT IN INPUT
AUTO 0.11
ATTENTION: the test was
not performed because of
voltage at the terminal
ends.
FUNC
CAL
In the case that:
R
CALIBRATION>RMEASURED
the instrument displays
the screen to the right.
LOW 05.06.01
0.00
R+ R-
0.00 0.00
219mA 219mA
CAL > RES
AUTO 0.11
ATTENTION:
R
CALIBRATION >RMEASURED
FUNC
CAL
6.1.5. "AUTO", RT+", "RT-" faulty cases
EN-19
AMPROBE
DMIII MULTITEST
If the value of
Resistance is higher
than 5 (but lower than
99.9) the instrument
emits a long beep and
displays a screen similar
to the screen to the right
LOW 05.06.01
Resistance value higher
than 5
5.17
R+ R-
5.17 5.17
209mA 209mA
AUTO 0.11
Test current
FUNC
CAL
If the value of
Resistance is higher
than 99.9 the
instrument emits a long
beep and displays the
screen to the right.
LOW 05.06.01
Resistance value higher
than 99.9
> 99.9
R+ R-
-.-- -.--
---mA ---mA
AUTO 0.11
ATTENTION: Value of
Resistance Out of Range
FUNC
CAL
THE PREVIOUS RESULTS CAN'T BE SAVED.
The displayed result can be stored pressing the SAVE key twice (refer to
paragraph 9.1).
The displayed result can be stored pressing the SAVE key twice (refer to
paragraph 9.1).
EN-20
AMPROBE
DMIII MULTITEST
ATTENTION
Before performing an insulation test make sure that the circuit under test is
not energised and all the loads are disconnected.
M
T1 T2 T3 T4
I1 I2 I3
(V1) (V2) (V3)
(COM)
Example: insulation measurement between phase and
earth in an electrical installation using untied cables.
6.2. INSULATION TEST: INSULATION RESISTANCE MEASUREMENT
The measurements comply with IEC 61557-2 and VDE 0413 part 1.
Turn the rotary knob to the INSULATION TEST position.
The F1 key allows the operator to select one of the following measuring
modes:
MAN mode (Manual mode) Recommended test.
TMR mode (Timer mode: test duration depends on the selected interval
from 10 to 999 seconds). This test can be executed when the test
required a defined duration.
6.2.1. Measurement Procedure
1. Select the desired mode using the F1 key.
2. Connect the test leads to the instrument input terminals T1 and T4 respectively,
3. If the cables supplied with the instrument are not long enough for the measurement
you can extend the black cable.
4. Connect the instrument terminals to the object that is to be submitted to the
insulation test after de-energizing the circuit under test and all the relative
loads (see previous picture).
5. By means of F2 select the test voltage suitable for the type of test to be
performed (see Table1). The values to be selected are:
50V (test on telecommunication system)
100V
250V
500V
1000V
EN-21
AMPROBE
DMIII MULTITEST
Standard
Brief description
Test voltage
Maximum limit value
CEI 64-8/6
Systems SELV or PELV
Systems up to 500V (Civil installations)
Systems over 500V
250VDC
500VDC
1000VDC
> 0.250M
> 0.500M
> 1.0M
CEI 64-8/4
Floor and wall insulation in civil installations
Floor and wall insulation in systems over 500V
500VDC
1000VDC
> 50k (se V<500V)
> 100k (se V>500V)
EN60439
Electrical panel boards 230/400V
500VDC
> 230k
EN60204
Electrical equipment of machines
500VDC
> 1M
CEI 64-4
Floor insulation in medical rooms
500VDC
<1M (if the floor is at least 1 year old)
<100M (if the floor is at least 1year old)
Rated voltage selected
for the test
R
MAX
= Maximum resistance
value
50VDC
99.9M
100VDC
199.9M
250VDC
499M
500VDC
999M
1000VDC
1999M
ATTENTION
Never disconnect the test leads from the circuit under test when the
message "MEASURING" is being displayed, as the circuit under test may
remain charged at a dangerous voltage. The instrument has an internal
"safety resistor" which is connect to output terminal before the end of the
test in order to discharge the parasite capacities of the installation.
START
STOP
Table1: Table reporting the test voltage and the corresponding limit values for
few Guidelines.
Table2: Table of maximum resistance values which can be measured under M
mode depending on the rated voltage selected.
6. If the "TMR" mode was selected use the F3, F4 keys to set the duration time of
the test:
7. Press the START key.
The instrument will start the test.
MAN Mode: The test will take 4 seconds (maximum). If you keep
the START key pressed longer than 4 seconds the test
continues until the key is released.
TMR mode: The test will take the time set. If you want to stop
the test when it's running, press the START/STOP key again.
EN-22
AMPROBE
DMIII MULTITEST
At the end of the test if
the insulation
resistance is lower
than R
MAX
(see Table2)
and the instrument
generates the
Nominal test Voltage,
the instrument emits a
double beep,
indicating the positive
outcome of the test
and displays a screen
similar to the screen to
the right.
M 05.06.01
Insulation Resistance
1.07 M
514V 15s
MAN 500V
Voltage during the Test
Duration of the Test
Test mode
Test voltage set
FUNC
VNOM
If the Insulation
resistance is higher
than R
MAX
(see Table2),
the instrument emits a
double beep at the end
of the test indicating
the positive outcome
of the test and displays
one screen similar to the
screen to the right.
M 05.06.01
Maximum resistance value
which can be measured
(999 is displayed if a
rated voltage of 500V was
selected, see Table2).
> 999 M
523V 15s
MAN 500V
The symbol ">" means that
the resistance value is
higher than R
MAX
.
Test duration
FUNC
VNOM
6.2.2. Results of "MAN" mode
In order to evaluate the test you must compare the result with the limits indicated in the
Guidelines (see Table1).
The displayed result can be stored pressing the SAVE key twice (according to
paragraph 9.1).
The displayed result can be stored by pressing the SAVE key twice (refer to
paragraph 9.1).
EN-23
AMPROBE
DMIII MULTITEST
At the end of the test if
the Insulation
resistance is lower
than R
MAX
(see Table2)
and the instrument
generated the
Nominal test Voltage,
the instrument emits a
double beep
indicating the positive
outcome of the test
and displays a screen
similar to the screen to
the right.
M 05.06.01
Insulation Resistance
1.07 M
514V 15s
TMR 500V TIME:60s
Voltage during the Test
Duration of the Test
Test mode
FUNC
VNOM
If the Insulation
resistance is higher
than R
MAX
(see Table2),
the instrument emits a
double beep at the end
of the test indicating
the positive outcome
of the test and displays
a screen similar to the
screen to the right.
M 05.06.01
Maximum resistance value
that can be measured
(999 is displayed if a
rated voltage of 500V was
selected, see Table2).
> 999 M
523V 15s
TMR 500V TIME:60s
The symbol ">" means that
the resistance value is
higher than R
MAX
.
Test duration
FUNC
VNOM
6.2.3. Results of "TMR" mode
The displayed result can be stored by pressing the SAVE key twice (according to
paragraph 9.1).
The displayed result can be stored pressing the SAVE key twice (according to
paragraph 9.1).
EN-24
AMPROBE
DMIII MULTITEST
If the instrument
detects the External
Power supply adapter
the instrument will
show the message
displayed to the right.
M 05.06.01
-.- -
M
---V 15s
REMOVE POWER
MAN 500V
Disconnect the External
Power Supply Adapter
FUNC
VNOM
If the instrument
detects a Voltage
between the input
terminals higher than
15V, the instrument
does not perform the
test and displays the
screen to the right for
5 seconds.
M 05.06.01
-.-
- M
---V 15s
VOLT IN INPUT
MAN 500V
ATTENTION: the test can't be
executed. Check that the circuit is
not energized.
FUNC
VNOM
If the instrument can't
generate the Nominal
Test Voltage it will
emit a long beep and
displays a screen
similar to the screen
to the right.
M 05.06.01
Insulation Resistance
1.17
M
107V 15s
MAN 500V
ATTENTION: the test of
resistance R
ISO
was taken at a
voltage value lower than the
set rated voltage. Low
insulation case. This case
occurs under low insulation
conditions or in the presence of
capacitance on the installation.
FUNC
VNOM
Test Duration
6.2.4. "MAN" and "TIMER" mode faulty cases
This result can't be saved
EN-25
AMPROBE
DMIII MULTITEST
L1
L3
T1 T2
T3 T4
I1 I2 I3
(V1) ( V2) (V3)
(
COM)
Instrument connection for Phase Sequence Detection in a 400V three-phase system
At the end of the test
the instrument emits a
double beep
indicating that the test
has correctly
terminated and
displays the values to
the right.
LOOP 05.06.01
Phase Sequence OK
123
FRQ=60.0HZ V1-2=115V
V2-3=113V V3-1=114V
OK
Value of the Phase to Phase
Voltage
Working mode
The displayed result can be stored by pressing the SAVE key twice (refer to
paragraph 9.1).
6.3. : PHASE SEQUENCE INDICATOR
Turn the rotary knob to the position.
6.3.1. Measurement procedure and results of " " mode
1. Connect the Black, Red and Blue connectors of the split cables to their
corresponding input terminals of the instrument T1, T2, T3.
2. Press the START key to execute a test.
This result can be stored pressing the SAVE key twice (refer to paragraph 9.1).
EN-26
AMPROBE
DMIII MULTITEST
EN-27
AMPROBE
DMIII MULTITEST
In the " " mode, if a
Phase-to-Phase voltage
is lower than 100V, the
instrument displays the
screen to the right.
LOOP 05.06.01
-
- -
FRQ =60.0HZ V1-2=111V
V2-3= 0 V V3-1= 0V
LOW VOLTAGE T
PHASE ROTATION
Phase "T2 Voltage is lower
than 100V
In the " " mode, if the
instrument detects two
phases connected
together it displays the
screen to the right.
LOOP 05.06.01
-
- -
FRQ =60.0HZ V1-2=107V
V2-3= 0 V V3-1=107V
PHASE DOUBLED
PHASE ROTATION
Two phases are connected
together.
In the mode, if the
voltage of one or more
phase is too low, one or
more phases has a low
voltage the instrument
will show a screen
similar to the along side
displayed.
LOOP 05.06.01
Phase Sequence not
correct
123
FRQ =60.0HZ V1-2=391V
V2-3= 0V V3-1= 0V
NOT CORRECT
Message “LOW Voltage
Phase T”: means that
Phase T has a low voltage
value. Similar message for
Phase R and S.
6.3.2. Faulty Cases
THE PREVIOUS RESULTS CANNOT BE SAVED.
EN-28
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