Gossen MetraWatt METRALINE DM 61 User manual

METRALINE DM 61/62
Analog-Digital Multimeter 3-447-013-03
4/1.19
Operating Instructions

2 GMC-I Messtechnik GmbH
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(10) (11)
(18)
(20)
(12)
(21)
(11)
(19)
(16)
(15)
(14)
(17)
(15)
(13)

GMC-I Messtechnik GmbH 3
1 Liquid crystal display
2 PMAX / PMIN pushbutton
3 Pushbutton for MIN/MAX functions
4 Pushbutton for manual range selection
5 Multi function pushbutton
6 Function selector switch
7 Terminal sockets with automatic blocking system
8 Pushbutton for HOLD function
9 Pushbutton for backlight function
10 Main display for digits, decimal point and polarity
11 Display for manual range selection, Hold, MIN/MAX, Relative, Peak functions
12 Overrange indication
13 Bar graph for analog indication
14 Sub-display for digits, decimal point and polarity
15 Display for the unit of measured quantity
16 Display for indication of Auto Off Function
17 Display for diode testing
18 Buzzer indication
19 hFE: no function here
20 Low battery indication
21 Display for the selected function i. e. AC or DC
Standard Equipment
1Multimeter
1 Protective rubber cover
1Cableset
2 Batteries, 1.5 V, type AA, installed
1 Operating instructions

4 GMC-I Messtechnik GmbH
Contents Page
1 Introduction ................................................................................6
2 Safety Features and Safety Precautions ....................................6
3 Switching the Multimeter „ON“ .................................................9
4 Function and Range Selection .................................................10
4.1 Switching the Measuring Ranges .............................................................10
4.2 Auto / Manual Ranging ............................................................................10
5 Liquid Crystal Display (LCD) .....................................................11
5.1 Digital Display .........................................................................................11
5.2 Analog Indication ....................................................................................12
5.3 Backlight ................................................................................................12
6 HOLD and Delay Hold Feature ..................................................13
6.1 HOLD Feature .........................................................................................13
6.2 Delay Hold Feature ..................................................................................13
7 MIN/MAX Feature .....................................................................13
8 Peak Measurement ..................................................................14
9 Voltage Measurement ..............................................................15
10 Current Measurement ..............................................................16
10.1 AC Current Measurement with (Clip-on) Current Transformer ....................17
10.1.1Transformer Output mA/A .......................................................................17
10.1.2Transformer Output V ..............................................................................18
11 Resistance Measurement ........................................................19
12 Continuity Test and Diode Test ................................................20
12.1 Continuity Test ........................................................................................20
12.2 Diode Test ..............................................................................................20
13 Capacitance Measurement (METRALINE DM 62 only) .............23
14
Frequency and Duty Measurement (METRALINE DM 62 only) ............ 24

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14.1 Frequency Measurement .........................................................................24
14.2 Duty Cycle Measurement .........................................................................24
15 Temperature Measurement .....................................................25
16 Technical Characteristics ....................................................26
17 Maintenance ............................................................................32
17.1 Battery ...................................................................................................32
17.2 Fuses .....................................................................................................33
17.3 Case ......................................................................................................34
17.4 Device Return and Environmentally Compatible Disposal ...........................34
18 Product Support .......................................................................35
19 Repair and Replacement Parts Service
Calibration Center and Rental Instrument Service .................. 35
20 Manufacturer‘s Warranty .........................................................36
21 Registration .............................................................................36

6 GMC-I Messtechnik GmbH
1 Introduction
Thank you very much for selecting our multimeter. These multi-
meters are manufactured as per IS 13875 and DIN 43751.
2 Safety Features and Safety Precautions
You have chosen a multimeter which provides you with a very
high degree of safety. The analog-digital multimeters are man-
ufactured and tested in compliance with the safety standard
IEC 61010-1:2010/ DIN EN 61010-1:2011. In case of incor-
rect use or careless handling, the safety of both user and mul-
timeter is not guaranteed.
For proper use and safe handling, it is absolutely necessary to read
and understand the operating instructions before using the multime-
ter.
For your safety and protection, the multimeters are fitted with
an Automatic terminal Blocking System (ABS). It is coupled
with the function selector switch which blocks the terminal
sockets not necessary for measurement.
Please note the following safety precautions
• The multimeter must be operated only by persons who
understand the danger of shock hazards and are aware of
the necessary safety precautions. Shock hazards exist
wherever voltage of more than 30 V (TRMS) is present.
• Do not work alone in shock hazardous environment while
carrying out measurements.
• The maximum permissible voltage between terminal socket
(7) and ground is 1000 V.
• Take into account that unexpected voltages may occur on
devices under test (e. g. defective instrument). For exam-
ple, capacitors may be charged to a dangerously high volt-
age.
• Verify that the test leads are in good condition e. g. no
cracked insulation, no open circuits in the leads or connec-
tors.

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• This multimeter must not be used for measurements on
circuits with corona discharge (high voltage).
• Be particularly careful when measuring on HF circuits. Dan-
gerous composite voltages may exist there. Measurements
under moist environmental conditions are not permitted.
• Do not overload the measuring ranges beyond their allow-
able capacities. Limit values are given in specifications, see
section 16.
• All current measuring ranges are protected with a fuse. The
maximum permissible voltage of the measuring circuit (nomi-
nal voltage of the fuse) is 1000 V AC/DC in the „mA“ and „A“
ranges.
• Protection provided by the digital multimeter may be
impaired if the multimeter is not used in a manner specified
in this user manual.
Meaning of the symbols on the device
Warning concerning a source of danger
(Attention, refer to the operating instructions)
Earth (ground) terminal.
Double or reinforced insulation
CAT II / III / IV Instrument for overvoltage
category II / III or IV
EU conformity mark
UL UL approval

8 GMC-I Messtechnik GmbH
Opening of Equipment / Repair
The equipment may be opened only by authorized service per-
sonnel to ensure the safe and correct operation of the equip-
ment and to keep the warranty valid.
Even original spare parts may be installed only by authorized
service personnel.
In case the equipment was opened by unauthorized person-
nel, no warranty regarding personal safety, measurement
accuracy, conformity with applicable safety measures or any
consequential damage is granted by the manufacturer.
Repair and Parts Replacement by Authorized Service Personnel
When the instrument is opened, voltage conducting parts may
be exposed. The instrument must be disconnected from the
measuring circuit before the performance of repairs or the
replacement of parts. If repair of a live open instrument is
required, it may only be carried out by trained personnel who
are familiar with the dangers involved.
Faults and abnormal stress:
If it has been ascertained that safe operation is no longer pos-
sible, take the multimeter out of service and secure it against
accidental use. Safe operation may not be possible
• if the multimeter shows obvious signs of damage,
• if the multimeter no longer functions correctly,
• after prolonged storage under adverse conditions,
• on account of severe stress during transport,
• if the multimeter is not being used in compliance with the
manner described in this manual.

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3 Switching the Multimeter „ON“
Battery
Your multimeter works on 2 x AA size alkaline manganese bat-
teries per IEC LR6. They are provided with the multimeter.
Before you use the multimeter for the first time or after storage,
refer to section 17.1. Set the rotary knob (6) to other than the
„OFF“ position to switch the multimeter ON. Switch „ON“ is
acknowledged by an acoustic signal. All segments of the LCD
will be displayed as shown on page 2.
Note:
Electric discharges and high-frequency influence may cause
incorrect information to be displayed and block the measuring
process. Reset the multimeter by switching it OFF and ON
again. Otherwise, check the battery connections. Disconnect
the multimeter from the measuring circuit before you open it,
and refer to section 17.
Automatic Meter-OFF (MoFF)
The digital multimeter has a default auto meter-off function. If
the multimeter is idle for more than 15 minutes, the multimeter
automatically turns the power off. When MoFF happens, the
state of the multimeter is saved. The „MoFF“ (16) sign on the
LCD panel indicates whether the MoFF is enabled or not. In
some cases, the user might want to disable this feature. Power
ON the multimeter by pressing any of the push functions
except for the HOLD (8) and multifunction (5) pushbuttons.
After auto meter-off, pushing any of the push functions or
changing the rotary switch mode can turn on the multimeter
again. If the multimeter is re-powered by changing the rotary
mode, the saved state is cleared. If the multimeter is re-pow-
ered by push functions, the chip restores the saved state and
enters HOLD mode. The LCD displays the saved value.
Turning the multimeter OFF
To turn OFF the multimeter, set the rotary knob (6) to the „OFF“
position.

10 GMC-I Messtechnik GmbH
4 Function and Range Selection
The function selector switch (6) is coupled with the Automatic
terminal Blocking System (ABS) which allows access only to
two correct sockets for each function. Prior to switching to the
„mA“ or „A“ functions or from the „mA“ or „A“ functions,
remove the test lead from the corresponding socket. When the
test leads are plugged in, the terminal blocking system pre-
vents accidental switching to non permissible functions.
4.1 Switching the Measuring Ranges
The 660 mVAC and 660 mVDC measuring ranges are not
automatically selected when the multimeter is switched ON.
The above ranges can only be selected manually with the
„AUTO/MAN“ key.
4.2 Auto / Manual Ranging
The multimeter features auto ranging for all measuring ranges
with the exception of the °C, °F, continuity, Diode, %, AAC,
ADC. Autoranging is automatically selected after switching the
multimeter ON. According to the measured quantity applied,
the multimeter automatically selects the measuring range
which gives the best resolution. You can switch OFF auto-
ranging and select the ranges manually according to the table
shown in this section. Manual mode is switched OFF when
pushbutton AUTO/MAN is pressed (4) for approximately 1 s, or
when the function selector switch (6) is operated, or when the
multimeter is turned OFF and ON again.

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Note: °C, Continuity, Diode, AAC, ADC, % all functions have
fixed range.
5 Liquid Crystal Display (LCD)
5.1 Digital Display
The main digital display (10) shows the measured value with
correct location of decimal point and sign. The selected mea-
suring unit (15) and the function (21) are simultaneously dis-
played. When measuring DC quantities, a minus sign appears
in front of the digits, when the positive pole of the measured
quantity is applied to the „ “ input terminal. When upper range
limit 6600 (on the range :1999) is exceeded, „OL“ is dis-
played. The digital display is updated 2.8 times per second.
The digital sub-display (14) shows the measured value with
correct location of decimal point and sign. The main purpose
of the two digital displays is to display simultaneous measure-
ment as mentioned below:

AUTO/
MAN
(4)
Function
Acknow-
ledgement
Display
brief Manual mode ON:
utilized measuring range is fixed
MAN
(11)
brief
Range switching sequence for:
VAC/VDC: 6.6 V →66 V →660 V →1000 V →
660 mV →6.6 V ...
mA AC/mA DC: 66 mA →660 mA →66 mA ...
Ω:660Ω→6.6 kΩ→66 kΩ→
660 kΩ→6.6 MΩ→66 MΩ→660 Ω
F:
6.6 nF → 66 nF → 660 nF → 6.6 μF → 66 μF
660 μF
→ 6.6 mF → 40 mF → 6.6 nF ...
Hz: 66 Hz →660 Hz →6.6 kHz →66 kHz →
660 kHz →6.6 MHz →10 MHz →66 Hz...
MAN
(11)
long Return to automatic range selection AUTO (11)

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5.2 Analog Indication
The analog indication with bar graph is updated 28 times per
second. Analog indication is of particular use when observing
variations of measured values. The analog bar graph (13) has
its own polarity indication in measuring DC quantities, when
the positive pole of the measured quantity is applied to the „ “
input terminal. Analog bar graph has 65 scale divisions so that
variations of the measured values around „zero“ can be
observed exactly. The overrange is indicated by the right trian-
gle (12) when measured value is > 6600 counts (for mea-
surement > 1999).
5.3 Backlight
The instrument is provided with user selectable backlight for
taking measurements in poor lighting conditions/dark areas.
Switching the backlight ON
By pressing (9) key, the backlight can be switched ON for
60 s.
Switching the backlight OFF
By pressing the (9) key once again before 60 s, the back-
light can be switched OFF. Otherwise it switches off automati-
cally after 60 s.
Main Display Sub-display
Voltage Frequency
Voltage Min/Max
Frequency Duty cycle
Current Frequency

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6 HOLD and Delay Hold Feature
6.1 HOLD Feature
After pressing the „HOLD“ (8) button, the multimeter stops
updating the LCD panel. After enabling the HOLD function, the
multimeter switches from AUTO to the manual ranging mode,
but the measuring range remains the same.
6.2 Delay Hold Feature
The multimeter provides a delay HOLD feature. To activate the
delay HOLD feature, press the „HOLD“ (8) button for 2 sec-
onds. The multimeter will wait for 6 seconds, then enters
HOLD mode. During the 6 second period, the HOLD symbol
on the LCD will blink and after 6 seconds, the multimeter will
hold the measured value present on the LCD. To exit the delay
HOLD function, either change range or press the „AUTO/MAN“
(4) or „HOLD“ (8) button again.
7 MIN/MAX Feature
With the MIN/MAX function, you can hold the minimum and
maximum measured value which has been applied to the input
of the multimeter after activating the MIN/MAX function. The
most important application is the determination of the mini-
mum and maximum value for long-term monitoring of mea-
sured parameters. The actual measured value can still be
noted/read during this feature. Apply the measured quantity to
the multimeter and select the measuring range prior to activat-
ing the MIN/MAX function. With the function activated, you can
select the measuring ranges only manually, if you switch to
another range, the stored MIN/MAX values are cleared. After
pressing MIN/MAX (3) for the first time, the sub-display shows
maximum value. The sub-display shows minimum value when
it is pressed again. The main display always shows the current
value in MIN/MAX mode. To exit from this mode, either press
and hold the MIN/MAX (3) button for longer than one second,
operate the function selector switch (6) or turn the multimeter
OFF and ON again. Pressing HOLD (8) in MIN/MAX mode

14 GMC-I Messtechnik GmbH
makes the multimeter stop updating the maximum or the mini-
mum value.
Note
MIN/MAX function is available in all measuring ranges except in
Hz.
8 Peak Measurement
METRALINE DM 61 and 62 provide a peak hold function to
capture the maximum or minimum peak value. To enter peak
mode, press the PEAK (2) pushbutton for less than 1 second.
A self-calibration process will be executed automatically before
normal peak-hold operation. In peak mode, the main display
shows the current value of signal, and the sub-display shows
the PMAX or PMIN value which is selected by the PEAK key.
After pressing the PEAK (2) pushbutton for the first time, the
sub-display shows the PMAX value. The sub-display shows
the PMIN value when the PEAK (2) pushbutton is pressed
again. To exit the PEAK-hold function, either press the PEAK
key for more than 1 second, operate the function selector
switch (6) or turn the multimeter OFF and ON again.

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9 Voltage Measurement
According to the voltage to be measured, set the function
selector switch (6) to V AC or V DC. Connect the test leads as
shown. The „ “ socket should be connected to the lowest
potential ground available. In V AC mode, the main display
always shows voltage and the sub-display shows frequency.
Note
The 660 mV measuring ranges can only be selected manually
with the „AUTO/MAN“ (4) pushbutton.
Caution
Ensure that the current
measuring range („mA“ or
„A“) is not selected during
voltage measurement! If
the cut-out rating of the
fuses is exceeded due to
improper operation, a
dangerous situation may
occur!
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16 GMC-I Messtechnik GmbH
10 Current Measurement
• First disconnect the power supply to the circuit being mea-
sured and/or to the load, and discharge all capacitors
within that circuit.
• With the function selector switch (6), select A for currents
> 660 mA and mA for currents ≤660 mA. When measur-
ing current of unknown magnitude, select the highest mea-
suring range first.
• Select the function corresponding to the measured quan-
tity by briefly pressing the yellow multi-function (5) pushbut-
ton.
• Each time the pushbutton is pressed, alternate switching
takes place between DC and AC. The change-over is
acknowledged by an acoustic signal.
• The symbols DC and AC (21) are displayed as per selected
function on the LCD.
• When selecting a range with the function selector switch
(6), the DC function is always set by default.
• Connect the multimeter in series with the load, as shown.
Ensure that the connections are tight (with least resis-
tance).
Notes on current measurement
• The multimeter must be used only in the power systems,
where the current circuit is protected by a fuse or a circuit
breaker of 20 A, and when the nominal voltage of the sys-
tem does not exceed 1000 V AC/DC.
• Carefully secure the measuring circuit connections by
mechanical means so that they do not accidentally open.
The conductor cross sections and connection points
should be designed so as to avoid excessive heating.
• The current measuring ranges up to 660 mA are protected
against a short circuit current of 25 A by a 1.6 A/
1000 V AC/DC fuse in conjunction with power diodes.

GMC-I Messtechnik GmbH 17
The cut-out capacity of the fuse is 10 kA at a rated voltage
of 1000 V AC/DC and ohmic load.
• The 10 A current measuring ranges are protected by a
10 A / 1000 V AC/DC fuse. The cut-out capacity of the
fuse is 30 kA at a nominal voltage of 1000 V AC/DC and
ohmic load.
• Replacement of the fuses is described in section 17.
10.1 AC Current Measurement with (Clip-on) Current Transformer
10.1.1 Transformer Output mA/A
Caution
If current transformers are operated with an open circuit on the
secondary side, e. g. due to defective or disconnected leads, a
blown fuse in the multimeter, or a wrong connection, danger-
ously high voltages may occur at the connectors. Therefore,
make sure that the current circuit of the multimeter and sec-
ondary winding of the transformer connected to the multimeter
form an intact circuit. Connect the transformer to the and
mA or A sockets. The maximum permissible operating voltage
is the nominal voltage of the current transformer. When reading
the measured value, take into account the transformer ratio
and the additional error in indication.
Transformer output METRALINE DM 61
The METRALINE DM 61 shows the switching position and the
corresponding sockets. Connect a (clip-on) current trans-
former with a transmission ratio of 1000:1 to this socket. The
measured values are then displayed directly in the „A“ range.

18 GMC-I Messtechnik GmbH
10.1.2 Transformer Output V
Many transformers have a voltage output (referred to as mV/A).
The secondary output must therefore be connected to the
connection sockets „“and„V“.
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AC current measurement with (clip-on) current transformers
Current measurement

GMC-I Messtechnik GmbH 19
11 Resistance Measurement
• Verify that the device under test is electrically dead.
External voltages would falsify the measured result!
• Set the function selector switch (6) at „Ω“.
• Connect the device under test as shown.
Zero adjustment on the 660 Ωmeasuring range
When measuring small resistance values on the 660 Ωrange,
you can eliminate the resistance of the leads and contact resis-
tance by means of the REL function.
• Connect the test leads with the multimeter and join the free
ends.
• Press and hold the PEAK (2) key and press the AUTO/MAN
(4) pushbutton. The multimeter enters into the „REL“ mode.
The „REL“ symbol is displayed on the LCD.
• The value „00.00“ (+1 digit) is shown on the main display
while the resistance value measured at the time of pressing
the pushbuttons is indicated on the sub-display and used
as reference value.
• This value is automatically deducted from the values mea-
sured subsequently.
The REL function can be cleared
• by pressing and holding the PEAK pushbutton and then
pressing the AUTO/MAN key. This is acknowledged by
acoustic signals.
• by switching the multimeter off.

20 GMC-I Messtechnik GmbH
12 Continuity Test and Diode Test
• Verify that the device under test is electrically dead. Exter-
nal voltages would falsify the measured results!
12.1 Continuity Test
• Set the function selector switch (6) at „Ω“, then press the
yellow multi-function pushbutton (5). The multimeter
acknowledges turn-ON with an acoustic signal.
• At the same time, (18) appears on the LCD and „OL“ is
displayed on the main display.
• An acoustic signal is generated whenever the reading is
less than 30 Ω.
12.2 Diode Test
• Set the function selector switch (6) at „Ω“, then press the
yellow multi-function pushbutton (5) twice. The multimeter
acknowledges turn ON with an acoustic signal.
• At the same time, (18) appears on the LCD and „OL“ is
displayed on the main display.
• The multimeter displays the forward voltage in Volts.
• As long as the voltage drop does not exceed the maximum
display value of 1.999 V, you can also test several series-
connected elements or reference diodes with a small refer-
ence voltage.
• Reverse direction or open circuit: the multimeter indicates
overrange „OL“.
• With the diode function selected, the multimeter emits a
continuous acoustic signal whenever the reading is less
than 30 mV.
Note
Resistors and semiconductor junction in parallel with the diode
falsify the measured results!