Scope of Delivery (depending on instrument variant)
1kHz
1kHz
1 METRAHIT IM XTRA or METRAHIT IM E-DRIVE multimeter
with rubber holster
1 Probe with start/stop and store/send function
1 KS17-2 cable set: 1 pair of safety measurement cables,
red/black, with 4 mm test tips
1 Type KC4 Kelvin clip (1 pair with METRAHIT IM XTRA)
1 Type KC27 Kelvin probe (with METRAHIT IM E-DRIVE only)
1 Quick change, rechargeable lithium polymer battery with
micro USB charging socket
1 USB mains power pack (5 V DC, 2 A) with cable and micro
USB charging plug
1 DAkkS calibration certificate
1 Hard case for the multimeter and accessories
1 Condensed operating instructions, German/English
– Comprehensive operating instructions in German and English
available on the Internet for download at www.gossenme-
trawatt.com
1 Card with registration key
for the software
Overview Supply
AccessoriesTypeArticle No. M273S M274S
METRAHIT IM XTRA
METRAHIT IM E-DRIVE BTM274BX
LiIon module & USB chargerZ270A+XX
Mains module with electrical
isolation and USB chargerOO
Remote probeZ270SZ270SXX
Cable set
The accessories available for your instrument are checked for
compliance with currently valid safety regulations at regular intervals, and are amended as required for new applications. Currently
up-to-date accessories which are suitable for your measuring
instrument are listed on our website along with photo, order number, description and, depending upon the scope of the respective
accessory, data sheet and operating instructions:
www.gossenmetrawatt.de
Software Version
These operating instructions describe a multimeter based on software version 1.2.6. Refer to chapter 4.4.1 in order to query the
respectively installed version number.
Current operating instructions for the latest firmware update are
available for download from our website at
www.gossenmetrawatt.com.
Please register at myGMC in order to continuously receive the latest information regarding current software and firmware, as well
as instrument updates and options.
We calibrate and recalibrate all instruments supplied by GMC-I
Messtechnik GmbH, as well as other manufacturers, at our service center, for example after one year within the framework of
your test equipment monitoring program, as well as prior to use
etc. See also chapter 9.7.
1.3Repair and Replacement Parts Service
Calibration Center* and Rental Instrument Service
If required please contact:
GMC-I Service GmbH
Service Center
Beuthener Straße 41
90471 Nürnberg, Germany
Phone: +49-911-817718-0
Fax:+49-911-817718-253
e-mail: service@gossenmetrawatt.com
www.gmci-service.com
This address is only valid in Germany.
Please contact our respective representatives or subsidiaries for
service in other countries.
* DAkkS calibration laboratory for electrical quantities, registration no.
D-K-15080-01-01, accredited per DIN EN ISO/IEC 17025
Accredited quantities: direct voltage, direct current value, direct current
resistance, alternating voltage, alternating current value, AC active power, AC apparent power, DC power, capacitance, frequency, temperature
Competent Partner
GMC-I Messtechnik GmbH is certified in accordance with
DIN EN ISO 9001.
Our DAkkS calibration laboratory is accredited by the Deutsche
Akkreditierungsstelle GmbH (national accreditation body of the
Federal Republic of Germany) under registration number
D-K-15080-01-01 in accordance with DIN EN ISO/IEC 17025.
We offer a complete range of expertise in the field of metrology:
from test reports and factory calibration certificates right on up to
DAkkS calibration certificates.
Our spectrum of offerings is rounded out with free test equipment management.
As a full service calibration laboratory, we can calibrate instruments from other manufacturers as well.
4GMC-I Messtechnik GmbH
2Safety Features and Precautions
You have selected an instrument which provides you with high
levels of safety.
This instrument fulfills all requirements of applicable EU directives
and national regulations. We confirm this with the CE mark. The
relevant declaration of conformity can be obtained from
GMC-I Messtechnik GmbH.
The TRMS digital multimeter has been manufactured and tested
in accordance with the following safety regulations:
IEC 61010–1:2010 / DIN EN 61 010–1:2011 (VDE 0411–1:2011)
and IEC 61010-2-033:2012 / DIN EN 61010-2-033 (VDE 04112-033)
When used for its intended purpose (see page 6), safety of the
operator, as well as that of the instrument, is assured. Their safety
is however not guaranteed, if the instrument is used improperly or
handled carelessly.
In order to maintain flawless technical safety conditions, and to assure
safe use, it’s imperative that you read the operating instructions thoroughly and carefully before placing your instrument into service, and that
you follow all instructions contained therein. Make sure that the operating instructions are available to all users of the instrument.
Tests may only be executed by a qualified electrician.
The multimeter is equipped with an automatic socket blocking
mechanism for your safety, and in order to safeguard your instrument. This mechanism is linked to the rotary switch and only
allows access to those jacks which are actually required for the
selected function. It also prevents the user from turning the rotary
switch to impermissible functions after the measurement cables
have already been plugged in.
Measuring Categories and their Significance per IEC 61010-1
CATDefinition
Measurements in electrical circuits
0
which are not directly connected to the mains:
e.g. electrical systems in motor vehicles and aircraft, batteries etc.
Measurements in electrical circuits
II
which are electrically connected to the low-voltage mains:
via plug, e.g. in household, office and laboratory applications
Measurements in building installations:
III
stationary consumers, distributor terminals, devices connected permanently to
the distributor
Measurements at power sources for low-voltage installations:
The measuring category and the maximum rated voltage which
are printed on the device apply to your measuring instrument, e.g.
1000 V CAT III.
Refer to chapter 10.2 regarding use of the measurement cables.
Observe the following safety precautions:
• The multimeter may not be used in potentially explosive atmospheres.
• The multimeter may only be operated by persons who are
capable of recognizing touch hazards and taking the appropriate safety precautions. Touch hazards in accordance with the
standard exist anywhere, where voltages of greater than 33 V
(RMS) or 70 V DC may occur. Avoid working alone when taking measurements which involve touch hazards. Be certain
that a second person is present.
• Maximum allowable voltage
between the voltage measuring sockets or all connector
sockets and ground is 1000 V for measuring category III and
600 V for measuring category IV.
• Be prepared for the occurrence of unexpected voltages at
devices under test (e.g. defective devices). For example,
capacitors may be dangerously charged.
• Make certain that the measurement cables are in flawless
condition, e.g. no damage to insulation, no interruptions in
cables or plugs etc.
• No measurements may be made with this instrument in electrical circuits with corona discharge (high-voltage).
• Special care is required when measurements are made in HF
electrical circuits. Dangerous pulsating voltages may be present.
• Measurements under moist ambient conditions are not permitted.
• Be absolutely certain that the measuring ranges are not overloaded beyond their allowable capacities. Limit values are
included in chapter 8, “Characteristic Values”, in the table entitled “Measuring Functions and Measuring Ranges” in the
“Overload Capacity” column.
• The multimeter may only be operated with installed rechargeable
batteries or mains module. Dangerous currents and voltages are otherwise not indicated, and the instrument may be damaged.
• Weak (insufficiently charged) rechargeable battery
If the “weak battery” icon appears in the battery level indicator,
it’s no longer permissible to perform safety-relevant measurements. Furthermore, compliance with the listed specifications
is no longer assured in the case of a weak rechargeable battery.
• The instrument may not be operated if the fuse cover, the
rechargeable battery pack or the mains module has been
removed, or if its housing is open.
• The input for the current measuring range is equipped with a
fuse link.
Maximum permissible voltage for the measuring circuit (=
rated voltage of the fuse) is 1000 V AC/DC.
Use specified fuses only (see page 49)! The fuse must have a
breaking capacity of at least 30 kA.
Opening the Instrument / Repairs
The instrument may only be opened by authorized, trained personnel in order to ensure flawless operation and to assure that the
guarantee is not rendered null and void.
Even original replacement parts may only be installed by authorized, trained personnel.
If it can be ascertained that the instrument has been opened by
unauthorized personnel, no guarantee claims can be honored by
the manufacturer with regard to personal safety, measuring accuracy, compliance with applicable safety measures or any consequential damages.
If a guarantee seal is included and it has been damaged or
removed, all guarantee claims are rendered null and void.
Repair and Replacement of Parts by Authorized, Trained Personnel
When the instrument is opened, voltage conducting parts may be
exposed. The instrument must be disconnected from the measuring circuit before performing repairs or replacing 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.
Defects and Extraordinary Strains
If it may be assumed that the instrument can no longer be operated safely, it must be removed from service and secured against
unintentional use.
Safe operation can no longer be relied upon:
• If the device demonstrates visible damage
• If the instrument no longer functions, or if malfunctioning
occurs
• After long periods of storage under unfavorable conditions
(e.g. humidity, dust or extreme temperature (see “Ambient
Conditions” on page 49)
GMC-I Messtechnik GmbH5
2.1Use for Intended Purpose
Attention!
!
Attention!
!
!
• The multimeter is a portable device which can be held in the
hand during the performance of measurements.
• Only those types of measurements described in chapter 6
may be performed with the measuring instrument.
• The measuring instrument, including measurement cables
and plug-on test probes, may only be utilized within the specified measuring category (see page 53 and the table on
page 5 regarding significance).
• Overload limits may not be exceeded. See technical data on
page 47 for overload values and overload limits.
• Measurements may only be performed under the specified
ambient conditions. See page 49 regarding operating temperature range and relative humidity.
• The measuring instrument may only be used in accordance
with the specified degree of protection (IP code) (see
page 50).
Data Backup
We advise you to regularly transfer your stored data to a PC in
order to prevent potential loss of data in the test instrument.
We assume no responsibility for any data loss.
Battery Pack Safety Precautions
The test instrument is powered by a rechargeable lithium-ion battery. Consequently, it’s absolutely essential to observe the following points:
• Temperature ranges: The test instrument with battery pack must
not be exposed to direct sunlight or charged, operated or
stored at high temperatures, for example in a car.
The following ambient conditions apply to the battery pack:
– Charging mode (10 ... 45 °C): The battery may only be charged
within this temperature range.
– Measuring mode (–10 ... 50 °C): The battery may only be used
within this temperature range.
– Storage (–20 ... 50 °C): The maximum storage temperature is
50 °C.
• Excessive depletion: The rechargeable battery’s safety circuit
consumes minimal amounts of current. In order to prevent the
battery from becoming fully depleted, the instrument should
be connected to the mains for recharging at least once a year,
and preferably at more frequent, regular intervals. In some
cases it’s no longer possible to recharge a fully depleted battery, in which case it must be replaced by GMC-I Service
GmbH.
2.2Meanings of Danger Symbols
Warning concerning a point of danger
(attention, observe documentation!)
Warning concerning dangerous voltage at the measurement
input: U > 15 V AC or U > 25 V DC
2.3Meanings of Acoustic Warning Signals
Hi-voltage warning: > 1000 V (intermittent acoustic signal)
Heavy current warning: > 1 A (continuous acoustic signal)
Excessive depletion should be avoided because the battery’s service life might otherwise be reduced, or the battery could fail. The battery pack is subject to selfdischarging at a rate of roughly 25% per year.
Battery pack transport:
Observe the supplementary sheet with safety information
for the Z270A or Z270G battery pack with rechargeable
lithium-polymer battery
(3-349-997-15 oder 3-447-030-15)!
The supplementary sheet with safety information for the Z270A/
Z270G battery pack is included with the manufacturer’s safety
data sheet for the installed lithium-polymer battery.
6GMC-I Messtechnik GmbH
3Operating Overview
2
3
4
1
5
6
8
Chapter 3.2
Chapter 5.6
Chapter 9.2
Chapter 3.3
13
Max. 1000 V!
12
15
Chapter 4.4.4
14
Chapter 3.4
11
7
Chapter 3.5
9
10
Battery full
Battery OK
Battery weak
Battery (almost) dead, U < 3.3 V
Charge Levels
134
567
8
11
12
3
109
135
6
1415
16
1%
REC
2
12
11
!
3.1Connections, Keys, Rotary Switch, Symbols
3.2Symbols Used in the Digital Display
1 Charging status LED (charging mode – yellow: battery is charging, green:
fully charged)
2 Display (TFT), see Chapter 3.2 for meanings of symbols
3 Softkeys (menu -dependent keys for selecting switching functions and
parameters, and for starting/ending measurements)
4 STORE: Save key or push/print function for IZYTRONIQ
5 OK: Key for acknowledgment and for restarting the instrument from the
standby mode by pressing and holding
6
Rotary switch
7 DAkkS calibration seal
for measuring functions, (see page 8 for meanings of symbols
8 Connector sockets for current measurement with automatic blocking
earthing input
A current measurement input
9 S+/S–: sense terminals for 4-wire measurements (m /4)
10 Extended connection for Z270S probe
(operating instructions 3-349-996-15)
Connector sockets for voltage measurement with automatic blocking
11
earthing input
V, , Temp, M, , , COIL measurement input
12 ESC:
Operating mode menu:
Press key briefly: Exit the menu level – jump back to a higher level, exit
parameters entry without saving
Press and hold: The instrument is switched to the standby mode. Switch
back on by pressing and holding the OK key.
13 MENU: Key for accessing the five main menus.
14 Scroll keys:
Increase parameter values
Operating mode menu: Selection of individual menu items
Decrease values
Operating mode menu: Selection of individual menu items
Increase measuring range or move decimal point to right (
Decrease measuring range or move decimal point to left (
15 Brightness sensor
Man
Man
function)
function)
1 Momentary measuring function
2 Memory symbol
3 Important, in this case: Uext (interference voltage) or
warning regarding dangerous voltage: U > 15 V AC or U > 25 V DC
4 Battery charge level
5 Func: switch back and forth amongst the functions of a given rotary
switch position
6 Data MinMax: switch amongst “Data” (freeze measured value), “Min-Max
storage” and deactivate both functions
7 Man Auto: switch back and forth between manual and automatic measur-
ing range selection
8 Display of the selected measuring range with manual measuring range
selection:
Select a lower measuring range
Select a higher measuring range
9 Selected test voltage
10 Select test voltage:
Select a larger test voltage
Select a smaller test voltage
11 Digital display with decimal point and polarity display
Measuring range exceeded: OL is displayed
12 Scale for analog display
13 Polarity selection
14 Zero: Zero balancing active
15 Start/Stop: For measurements which are not started automatically
16 Ip: Test Current
GMC-I Messtechnik GmbH7
3.3Symbols Used for Rotary Switch Positions
V
ACDC
V
AC
2
V
DC
2
+=
!
Consecutive number
Registration number
Date of calibration (year – month)
Deutsche Akkreditierungsstelle GmbH – calibration lab
XY123
2019-04
D-K-
15080-01-01
Switches
RISO0/4RISO MInsulation resistance measurement
Coil1Coil L1, L2, L3 [μs]Short-circuited coil test with optional COIL adapter
Coil2DAR [k/s]Dielectric absorption rate
Coil3PI [k/s]>Polarization index
V~0/5 VACAlternating voltage, AC TRMS, full bandwidth
Hz1HzVoltage frequency, full bandwidth
Hz2Duty AC %
Hz3RPM AC
V~ 4V AC Fil
V0/3VDC
V1V (AC+DC)
FUNC
DisplayMeasuring Function
Uext
UsetSelectable test voltage: 50, 100, 250, 500or 1000 V
UISOApplied/measured test voltage during measurement
1
1
Pulsating voltage, TRMS DC + AC, 15 Hz ... 500 Hz,
only for detection of interference voltage! (before starting
measurement)
Duty cycle measurement
RPM measurement
Alternating voltage, AC TRMS, with low-pass filter (1 kHz)
Direct voltage DC clamp (V): Current clamp sensor
Pulsating voltage, TRMS
Additional Current Clamp Sensor Function Clip = 1:1/10/100/1000
(via the “Setup for currently selected measurement” menu)
AC clamp (V): Current clamp sensorHz client (V): Current clamp sensor
AC + DC clamp (V): Current clamp sensor
V2V (AC+DC) Fil
0/4(DC) resistance
1F, nF, FCapacitance
Temp. RT D2C Pt 100/1000
Temp. TC3C, type KTemperature, type K thermocouple
0/2Continuity test with acoustic signal
1
Rlo0R
m/40R
A0/4 ADCDirect current amperage
A1A (AC+DC)Pulsating current amperage, AC DC TRMS
A2AACAlternating current amperage, AC TRMS
A3HzCurrent frequency
1
Clip = off
LO/2L 2-wire milliohm measurement where IP = /+/- 200 mA
LO/4W 4-wire milliohm measurement where IP = 200 mA or 1 A
1
Pulsating voltage, TRMS AC DC, with low-pass filter (1 kHz)
Temperature with Pt 100 / Pt 1000 resistance thermometer
VDiode voltage where I is constant
3.4User Interface Symbols in the Following Sections
... Scroll through main menu
... Scroll through submenu
Select decimal point,
increase/decrease measuring range
Increase/decrease value
(test voltage for insulation resistance measurement or
threshold for continuity test)
3.5Symbols on the Instrument
Warning concerning a point of danger
(attention, observe documentation!)
Ground
CAT III / IV
Measuring category III or IV device, see also “Measuring Categories and their Significance per IEC 61010-1” on page 5
Continuous, doubled or reinforced insulation
Indicates European Conformity
Fuse for current measuring ranges, see chapter 9.3
This device may not be disposed of with the trash. Further information regarding the WEEE mark can be
accessed on the Internet at www.gossenmetrawatt.com
under the search term WEEE (see also chapter 9.6).
Calibration seal (blue seal):
See also “Recalibration” on page 53
8GMC-I Messtechnik GmbH
4Initial Startup
Attention!
!
Note
MENU
MENUOKESC
MENU
OKOKESC
MENU
OKOKESC
MENU
OKOKESC
4.1Battery Pack
Be certain to refer to Chapter 9.2 regarding correct installation of the battery
pack!
Momentary battery capacity can be queried by clicking the Info
item in the General Setup menu:
➭ Press the MENU key to this end.
➭ Then press the General Setup softkey.
➭ Select the Info parameter with the help of the scroll keys.
The “Battery” parameter indicates the battery pack’s charge level
as a percentage.
Disconnect the instrument from the measuring circuit before removing the battery pack for charging!
4.2Mains Module
In preparation
4.4.2 Language >German/English – Selecting the User Interface
Language
➭ Press the MENU key.
➭ Press the General Setup softkey.
➭ Select the Language parameter with the help of the
keys.
➭ Switch to the settings menu with the help of the scroll key.
➭ Select the desired language with the
➭ Acknowledge by pressing the OK key. The input cursor jumps
back to the parameters list.
➭ Return to the main menu by pressing the ESC key or the MENU
key.
➭ The instrument is returned to the measuring mode after press-
ing the ESC key once more.
> General Setup > Language German/English
2x
scroll keys.
scroll
4.3Switching the instrument On
Switching the Instrument On Manually
➭ The instrument is switched on automatically after selecting
any rotary switch position other than OFF.
Electrical discharge and high frequency interference may
cause incorrect displays to appear, and may disable the
measuring sequence.
Disconnect the device from the measuring circuit. Switch the
instrument off and back on again in order to reset. If the
problem persists, briefly dislodge the battery from the
connector contacts (see also chapter 9.2).
4.4Querying or Setting Operating Parameters – General Setup
4.4.3 System > Date/Time – Setting Date and Time
➭ Press the MENU key.
➭ Press the General Setup softkey.
➭ Select the System parameter with the help of the
keys.
➭ Switch to the submenu with the help of the
➭ Select the Date or Time parameter with the help of the
scroll keys.
➭ Acknowledge the selected parameter by pressing the OK key.
The entry cursor jumps to a random position in the settings
menu.
➭ Select the desired entry position with the scroll keys and
change the respective value with the scroll keys.
➭ Acknowledge the change with the OK key. The entry cursor
once again marks the entire parameter line.
➭ Return to the main menu by pressing the ESC key twice or the
MENU key once.
➭ The instrument is returned to the measuring mode after press-
ing the ESC key once more.
> General Setup
System Time
09:50:20
3x
scroll
scroll key.
> General Setup
4.4.1 Info > Version – Check Current Software Version
➭ Press the MENU key.
➭ Press the General Setup softkey.
➭ Select the Info parameter with the help of the
➭ The version parameter indicates the current software (firm-
ware) revision level.
➭ The instrument is returned to the measuring mode after press-
ing the ESC key twice.
> General Setup >
GMC-I Messtechnik GmbH9
Info > Version
scroll keys.
4.4.4 System > Brightness – Digital Display Brightness
Brightness of the digital display can be set between 1 (minimum
brightness) and 9 (maximum brightness).
It can also be set to automatic. In this case, digital display brightness is adjusted depending on the intensity of the light which
strikes the brightness sensor.
> General Setup System Brightness:
System Date
13:06:2017
3x
1 ... 9, Auto
3x
4.4.5 System > Display Zeros
MENU
OKOKESC
<>BackSpEnter
Entry FieldKeypad
Shift
Entry Prompt
Entry field:
Delete
characters from
right
Entry field:
Accept
password from
entry field
Entry field:
Scroll left
Entry field:
Scroll
right
Keypad:
Switch
between
upper/
lower
case and
symbols
Char. Selection
in the Keypad
Transfer character
from the keypad to
entry field
MENU
MENU
OKOKESC
The Display Zeros parameter can be used to specify whether leading zeros will appear or be suppressed at the measured value display.
Entering the Old Password
> General Setup System
Change Password
> General Setup
System Display Zeros:
000.0 / 0.0
3x
4.4.6 System > Change Password
A password must be entered in order to adjust the parameters for
each of the following measurements:
• RISO: change test voltage
•M/4: change test current
The default password is “METRAHIT”.
If necessary, an individual password can be assigned via the
Change Password parameter.
Password protection is not activated with the default setting, i.e.
“METRAHIT”. An individual password must be entered in order to
activate this function.
Password Characteristics
Maximum length31 characters
Composition: any desired alphanumeric characters
Keyboard for Entering Text
Press the MENU key and then press the “General Setup” softkey.
Select the “System” menu with the help of the
Switch to the submenu with the help of the
scroll key.
scroll key and
select the Change Password parameter using the scroll keys.
After acknowledging the Change Password parameter by pressing
the OK key, “Old Password” appears in the header in order to
prompt you to enter your current password.
Your current password is entered using the alphanumeric keyboard. Select the individual characters from the keypad using the
scroll keys to this end. The position of the cursor is indicated by
the green background at the respective key. Acknowledge the
selected character by pressing the OK key, after which the character is transferred to the entry field. The last entered character or
characters can be deleted with the help of the BackSp (backspace)
key. You can move the blinking cursor in the entry field to the
desired position within the word using the “<” or “>” softkey, in
order to add characters or delete them with the help of the BackSp
softkey. The Shift softkey can be used to switch back and forth
between upper and lower case letters, as well as numerals and
special characters. A fully entered (old) password is accepted by
pressing the Enter key. “New Password” appears in the header in
order to prompt you to enter a new password.
Entering the New Password
Enter a new password as described above. After acknowledging
by pressing the Enter softkey, “Confirm Password” appears at the
display and prompts you to enter the new password once again.
Proceed as described above to enter the password again, and
then acknowledge by pressing OK. If the exactly the same password has been entered both the first and the second time, the following message appears in order to indicate that the password
has been successfully changed: “The password has been
changed”.
The menu mode is exited by pressing ESC three times and the
instrument is returned to the measuring function.
4.4.7 System > Display Profile – Digital Display View
Two different views can be selected here – black lettering against
a bright background or vice versa.
> General Setup
Default setting: White lettering against a dark background
System Display Profile:
Inverted or Normal
3x
10GMC-I Messtechnik GmbH
4.4.8 System > Default Settings
Note
Note
MENU
OK
OK
ESC
MENU
OK
OK
ESC
All of the settings which you have changed can be returned to
their default settings here. The following warning appears after
pressing the OK button: “Reset?”. The parameter settings are not
reset until you acknowledge with “Yes” (scroll with
press OK). Resetting can be aborted by scrolling with to No
and pressing OK.
> General Setup
System Default Settings:
Yes / N o Pro m pt
3x
to Yes and
4.5Switching the Instrument Off
Switching the Instrument Off Manually
➭ The instrument is switched off automatically by setting the ro-
tary switch to the OFF position. The display goes blank.
4.5.1 System > Auto-OFF – Automatic Shutdown
The period of time after which the instrument is shut down automatically regardless of whether a measuring or a menu view is
open can be set to a value within a range of 10 to 59 minutes.
The instrument is switched off automatically if the measured value
remains unchanged for a long period of time (maximum measured
value fluctuation of approx. 0.8% of the measuring range per minute or 1C or 1 per minute), and if none of the keys or the rotary
switch have been activated before a selected period of time in
minutes has elapsed. Shutdown is acknowledged with a brief
acoustic signal.
The password for changing the test voltage for insulation
resistance measurement is reset to METRAHIT.
If you adjust any settings deviating from the default settings, such as „Bluetooth = On“ or „Brightness = Auto“, it
may lead to a reduction in the service life specified in the
Characteristic Values.
> General Setup
System Auto-OFF:
10 ... 59 min/Off
3x
Exceptions
Transmission and memory mode operation, continuous operation
and whenever a dangerous voltage is applied to the input (U >
15 V AC or U > 25 V DC).
Deactivation (continuous operation)
Automatic shutdown can be deactivated.
Set the Auto-OFF parameter to Off in the System submenu of the
General Setup menu to this end.
GMC-I Messtechnik GmbH11
5Control Functions
1/3
2/3
ESC
2/3
5.1Help
The following information can be displayed for switch positions
and basic functions after they have been selected with the rotary
selector switch:
• Explanation of the measurement
• Measuring ranges
• Wiring diagram
➭ Press the MENU key to this end.
➭ Then press the “Help for currently selected measurement”
softkey. Comments concerning the measurement are displayed.
➭ By pressing the 1/3 softkey, the measuring ranges and test
voltages (2/3) are shown on the display.
➭ The wiring diagram (3/3) is displayed by pressing the 2/3 soft-
key.
➭ You can return to the help text (1/3) by pressing the 3/3 soft-
key.
➭ Press the ESC key once to return to the menu.
➭ The display can be returned to the measurement by pressing
the ESC key.
12GMC-I Messtechnik GmbH
5.2Selecting Measuring Functions and Measuring Ranges
Note
5.2.1 Automatic Range Selection
The multimeter is equipped with auto-ranging for all measuring
functions except for temperature measurement, as well as diode
and continuity testing. Auto-ranging is active as soon as the instrument is switched on. The instrument automatically selects the
measuring range which allows for highest possible resolution of
the applied quantity. When the instrument is switched to frequency measurement, the previously selected voltage measuring
range remains active.
AUTO-Range Function
The multimeter is switched automatically to the next higher range
at (3099 d + 1 d 0310 d), and to the next lower range at
(280 d – 1 d 2799 d).
In the case of high resolution (available depending upon measuring function), the multimeter is switched automatically to the next
higher range at (30,999 d + 1 d 03100 d), and to the next
lower range at (2800 d – 1 d 27,999 d).
5.2.2 Manual Range Selection
Auto-ranging can be deactivated and measuring ranges can be
selected manually in accordance with the following table by
pressing the Man / Auto button.
The desired measuring range can then be selected with the
or scroll key.
The instrument is automatically returned to automatic range selection when the Man / Auto key is pressed, the rotary switch is activated or the instrument is switched off and back on again.
Overview: Auto-Ranging and Manual Range Selection
FunctionDisplay
Man / Auto
Range switching sequence for:
V:300 mV*
Hz: 300 Hz
:
300
or
Man / Auto
* Only via manual range selection for V AC
A:
300A
A : 0.3 A 3 A 30 A 300 A
F:
30 nF
RISO:
300 k
Return to automatic measuring range selectionAuto
Manual mode active:
utilized measuring range is fixed
3 V 30 V 300 V 1000 V
3 kHz 30 kHz 300 kHz (Hz(U))
3 k
30 k
3 mA
30 mA
300 nF 3 F 30F
3 M
30 M
300 M
300 k
3 M
300 mA
30 M
1 A
300F
3000 M
Man
Man
The multimeter is held in the selected measuring range. If the
range limit is exceeded, “OL” appears at the display. You should
then switch to the next higher measuring range with the help of
scroll key.
the
5.2.3 Quick Measurements
Measurements performed using a suitable fixed measuring range
are executed more quickly than those which utilize automatic
range selection. Quick measurement is made possible with the
following two functions:
• Manual measuring range selection, i.e. by selecting the measuring
range with the best resolution (see Chapter 5.2.2)
or
•With the DATA function (see Chapter 5.5) In this way, the appro-
priate measuring range is selected automatically after the first
measurement and the second measurement is executed more
quickly.
The selected measuring range remains active for the subsequent
series of measurements with these two functions.
5.3Zero Offset / Relative Measurements
Zero offset or a reference value for relative measurements can be
stored to memory depending upon deviation from the zero point:
Deviation from zero point
– with short-circuited measurement cables for V, , A
– with open input for capacitance unit of measure F
0 ... 200 digits
Display
ZERO
The relevant reference or correction value is deducted individually
for the respective measuring function as an offset from all future
measurements and remains in memory until deleted, or until the
multimeter is switched off.
Zero balancing and reference value adjustment can be used with
auto-ranging, as well as for manual measuring range selection.
Note:
Zero offset is available for the following measuring functions and
switch positions: RISO, Coil, DAR, PI, Hz, Duty AC, RPM AC, ,
Temp RTD (the RLeads function is offered here as an alternative),
Temp TC, Continuity, Diode, R
pressing the START key!) and R
/2L (ZERO is also activated after
LO
/4L (the thermal compensation
LO
function is offered here as an alternative).
Zero Balancing
➭ Plug the measuring cables into the instrument and connect
the free ends to each other, except for capacitance measurement and current measurement in which case the ends of the
cables are not connected to each other.
➭ Briefly press the Zero softkey.
The value measured at the moment the key is pressed serves
as a reference value. The instrument acknowledges zero balancing with an acoustic signal, and “Zero” and the reference
value appear at the display. The Zero softkey is displayed with
a green background.
➭ Zero balancing can be cleared by once again pressing the
Zero softkey.
As a result of TRMS measurement, the multimeter displays a residual value of 1 to 10/35 digits with short-circuited measurement cables as the zero point for V AC / I
AC or V(AC+DC) / I (AC+DC) measurements (non-linearity of the TRMS converter). This has no influence on
specified accuracy above 1% of the measuring range (or
3% in the mV, V(AC+DC) ranges).
Setting the Reference Value
➭ Plug the measuring cables into the instrument and measure a
reference value (max. 50% of measuring range).
➭ Briefly press the Zero softkey.
The instrument acknowledges storage of the reference value
with an acoustic signal and the “ZERO” symbol appears at the
display. The value measured at the moment the key is
pressed serves as a reference value.
➭ The reference value can be cleared by once again pressing
the Zero softkey.
Notes Regarding Relative Measurement
• Relative measurement effects the digital display only.
The analog display continues to read out the original measured value.
• In the case of relative measurement, F or AC quantities may
also appear as negative values.
GMC-I Messtechnik GmbH13
5.4Display (TFT)
5.4.1 Digital Display
Measured Value, Unit of Measure, Type of Current, Polarity
The measured value with decimal and plus or minus sign appears
at the digital display. The selected unit of measure and current
type are displayed as well. A minus sign appears to the left of the
value during the measurement of zero-frequency quantities, if the
plus pole of the measured quantity is applied to the “” input.
The Display Zeros parameter can be used to determine whether
leading zeros will appear or be suppressed at the measured value
display (see chapter 4.4.5).
Exceeded Measuring Range
If the upper range limit of 1000 digits is exceeded “OL” (overload)
appears at the display.
Exceptions: “OL” appears at the display as of 1030.0 V in the
case of voltage measurement in the 1000 V range, as of 5100 V
for diode testing and as of 1.100 A in the 1 A range.
5.4.2 Analog Display
Measured Value, Polarity
The analog display demonstrates the dynamic performance of a
moving-coil mechanism. This display is especially advantageous
for observing measured value fluctuation, and for balancing procedures.
Display as a horizontal (green) bar which indicates the current
measured value in real-time.
The analog scale displays a small negative range for the measurement of zero-frequency quantities with positive measured values,
allowing for precise observation of measured value fluctuation
around zero. If the measured value exceeds a certain negative
range, polarity is reversed at the analog display.
The analog scale displays a small positive range for the measurement of zero-frequency quantities with negative measured value,
allowing for precise observation of measured value fluctuation
around zero in this case as well.
Scaling of the analog scale is automatic. This is very helpful for
manual measuring range selection.
Exceeded Measuring Range
Exceeding the measuring range is indicated exclusively via the
digital display.
Refresh Rate
The analog display is refreshed 40 times per second.
14GMC-I Messtechnik GmbH
5.5
Note
V, A, Hz
t [s]
100%
10%
Activated
Reactivated
Save
Save
3000 Digits
Of Measuring Range
F, %
Measured Value Storage – Data Function (auto-hold/compare)
General
An individual measured value can be automatically “frozen” with
the DATA function (auto-hold).
Applications
This function is useful, for example, when contacting the measuring points with the test probes requires your full attention. After
the measuring signal has been applied and the measured value
has settled in in accordance with the “condition” listed in the table
below, the measured value is frozen at the digital display and an
acoustic signal is generated. The test probes can now be
removed from the measuring points, and the measured value can
be read from the digital display. If the measuring signal falls below
the value specified in the table, the function is reactivated for storage of the next value.
The Data function can be activated in all measuring functions. This
is possible for the following functions after measurement has
been started: RISO, R
/2L and RLO/4L.
LO
Procedure
Apply the measured quantity to the instrument and set the measuring range with the Man / Auto softkey before activating the Data
function with the Data / MinMax softkey. Man appears at the display
with a green background. After activating the Data function with
the corresponding softkey, Man is grayed out and cannot be
changed until Data / MinMax is pressed again three times for deactivation. Data appears at the display with a green background. If
automatic measuring range selection was active prior to activation
of the Data function, switching to manual measuring range selection is also disabled as long as the MinMax function is active.
Data and the associated value appear between the digital and
analog displays.
ConditionResponse from Instrument
Meas.
Function
V, A, F, Hz, %> 10%
V, A, F, Hz, %< 10%
Measuring
Signal
rdg.
0L
MR
= 0L
Display
Data + MV
Is
displayed
Is
displayed
Stored MV
Is
cleared
Acous-
tic
1 x
1 x
2 x
1 x
2
Function
Data
ActivateShort
Save
(stabilized
measured
value)
Reactivate
Change to
MinMax
1
Reactivation results from falling short of specified measured value limits.
2
Two acoustic signals are generated the first time a measured value is
saved as a reference value. For subsequent data hold, two acoustic signals are only generated if the currently frozen value deviates from the first
saved value by less than 100 digits.
Data / Min-
1
Key
Max
Short
Key: MV = measured value, MR = measuring range
Example
The voltage measuring range is set manually to 30 V.
The first measured value is 5 V and is stored to memory because
it’s greater than 10% of the measuring range (= 3 V), and is thus
reliably above the background noise level. As soon as the measured value drops to less than 10 % of the measuring range, i.e.
amounts to less than 3 V which corresponds to removal of the
test probes from the measuring point, the instrument is ready to
store a new value.
Measured Value Comparison (DATA Compare)
If the currently frozen value deviates from the first saved value by
less than 100 digits, the acoustic signal is generated twice. If deviation is greater than 100 digits, only a brief acoustic signal is generated.
The Data function has no effect on the analog display, at
which the current measured value continues to appear.
However, when the digital display is “frozen”, the decimal
point is fixed as well (fixed measuring range, Man appears
with a gray-green background).
The selected measuring range cannot be manually
changed as long as the Data function is active.
The Data function is deactivated by briefly pressing the Data / Min-Max softkey three times, if you switch to the MinMax function,
when the measuring function is changed or when the instrument
is switched off and back on again.
GMC-I Messtechnik GmbH15
5.5.1 Saving Minimum and Maximum Values – “MinMax”
Note
START
STORE
Test T i p
Safety Cap
Safety Collar
Z
2
7
0
S
REC
S–A
V
Tem p
m/4
COIL
S+
KS17-2
General
Minimum and maximum measured values applied to the measuring instrument’s input after the MinMax function has been activated can be “frozen” at the display.
Applications
The most important use of this function is the determination of
minimum and maximum values during long-term measured value
observation. The MinMax function can be activated in all measuring functions. This is possible for the following functions after
measurement has been started: RISO, R
/2L and RLO/4L.
LO
The MinMax function has no effect on the analog display, at which
the current measured value continues to appear.
Procedure
Apply the measured quantity to the instrument and set the measuring range with the Man / Auto softkey before activating the Min-Max function with the Data / MinMax softkey. Man appears at the
display with a green background. After activating the MinMax
function with the corresponding softkey, Man is grayed out and
cannot be changed until MinMax is pressed again for deactivation.
MinMax appears at the display with a green background. If automatic measuring range selection was active prior to activation of
the MinMax function, switching to manual measuring range selection is also disabled as long as the MinMax function is active.
Both Min and Max, as well as the associated values, are displayed
between the digital and analog displays along with the time of
their occurrence.
The MinMax function is deactivated by briefly pressing the Data / MinMax softkey, when the measuring function is changed or when
the instrument is switched off and back on again.
As opposed to the Data function, the MinMax function can
also be used for temperature measurement.
The MinMax function is reset by pressing the ESC key.
After pressing Data / MinMax once again, the minimum and maxi-
mum values are displayed together with the average value
(“Avg.”). The Min Avg Max display appears without timestamp.
MinMax
Function
Activate
and save
Save and
display
StopShortAre deleted
Data /
MinMax
Key
Short
Min. and Max.
Measured Values
Are
saved
Storage continues in
background,
new min. and max. values are
displayed.
Response from Instrument
Display
Min + MV
Max + MV
Current
Measured value
Stored min. value1 x
Stored max. value1 x
cleared
Is
Acous-
tic
Signal
1 x
1 x
5.6Measured Value Memory – STORE Function.
The following options are available for the storage of measured
values:
• Store at instrument by pressing the STORE key on the instrument
• Store at instrument by pressing the STORE key on the probe
• Store at the PC by triggering the PUSH/PRINT function in the
report generating program IZYTRONIQ
5.6.1 Remote read-out and storage via the Z270S probe
The probe with integrated control unit permits remote triggering at
difficult to access places, and at locations which require your full
attention. The probe can be used for all measuring functions
except for current measurement. The connector cable is shielded
against interference.
➭ Connect the probe’s double plug to the voltage socket (V).
➭ Connect the KS17-2 safety measurement cable to the ground
socket.
➭ Establish contact with the measuring point.
➭ Start the respective measuring function by pressing the START
key on the probe.
➭ As soon as the measured value has settled in, it can be stored
by pressing the STORE key on the probe.
Alternatively, the measured value can be stored with the help
of the STORE key on the instrument.
The REC storage symbol appears briefly in the header in order to
visualize the storage process.
Electrical Safety
Maximum rated voltage300 V
Measuring category
Maximum rated current 1 A1 A16 A
With safety cap attached—
Without safety cap——
600 V
CAT IVCAT IIICAT II
Measurements per DIN EN 61010-031 may only be performed in
environments in accordance with measuring categories III and IV
with the safety cap attached to the control unit’s test tip.
In order to establish contact inside 4 mm sockets, the safety cap has
to be removed by prying open the snap fastener with a pointed
object (e.g. the other test probe).
5.6.2Remote Read-Out and Storage via the PC – PUSH/PRINT
Function
The procedure for storage via the PUSH/PRINT function is
described in the online help included with IZYTRONIQ report generating software.
600 V
16GMC-I Messtechnik GmbH
5.7Measurement Data Recording
System
Memory
Interface
Information
Language
General Setup
Recording
Record type
Sampling rate
Recording time
Hysteresis
Trigger
Trigger, low limit
Tri gger , high lim it
Groups
Clear memory
Start
Periodic
00:00.5
Unlimited
Off
Within
+00000
+01000
...
...
MENU
OK
MENU
OK
MENU
OK
The multimeter is capable of recording measurement data with
adjustable sampling rates, hysteresis and trigger conditions for
long periods of time in the form of measurement series (Parameter Record type = Periodic). Data are stored to a battery-backed
memory module, and are retained even after the multimeter is
switched off. The system acquires measured values relative to
real-time.
Momentary or stored measurement data can be read out via a
bidirectional wireless interface, Bluetooth or WiFi, or the USB port
at the optional mains module. IZYTRONIQ software is required to
this end.
See also interface operation chapter 7.
➭ First set the sampling rate for memory mode operation (see
below).
➭ Set recording time to Unlimited or to a value within a range of
0:00:00 to 90:00:00.
➭ Select an hysteresis in order to assure efficient use of memory
capacity.
➭ Select a trigger function if required.
➭ Check current memory occupancy (see below).
➭ Before starting lengthy measured value recordings, check the
battery’s charge level (see chapter 4.1) or use the mains module.
➭ Start memory mode operation (see below).
➭ First select the desired measuring function and an appropriate
measuring range.
Setting the Record Type
In this menu, you can choose between a definable periodic and
fixed sampling rate (parameter Periodic) and a one-off storage of a
data value by means of the STORE key (parameter Data Value).
➭ Press the MENU key.
➭ Press the General setup softkey.
➭ Select the Memory menu with the
scroll keys.
➭ Switch to the submenu with the help of the scroll key.
➭ Select the Record type parameter with the
scroll keys.
➭ Acknowledge the selected parameter by pressing the OK key.
➭ Change the respective value using the
scroll keys.
➭ Acknowledge the change with the OK key. The entry cursor
once again marks the entire parameter line.
> General setup
Memory Record type
Periodic / Data Value
Setting the Sampling Rate
This parameter cannot be set during memory mode operation.
Proceed as follows in order to set the sampling rate:
➭ Press the MENU key.
➭ Press the General Setup softkey.
➭ Select the Memory menu with the
➭ Switch to the submenu with the help of the
➭ Select the Sampling Rate parameter with the
scroll keys.
scroll key.
scroll keys.
➭ Acknowledge the selected parameter by pressing the OK key.
➭ Change the respective value using the
scroll keys
[h:mm:ss] or [mm:ss:s/10].
➭ Acknowledge the change with the OK key. The entry cursor
once again marks the entire parameter line.
> General Setup
Memory Sampling Rate
[h:mm:ss] / Data Value
Adjusting Recording Time
This parameter cannot be set during memory mode operation.
Proceed as follows in order to set recording time:
➭ Press the MENU key.
➭ Press the General Setup softkey.
➭ Select the Memory menu with the
➭ Switch to the submenu with the help of the
➭ Select the Recording Time parameter with the
➭ Acknowledge the selected parameter by pressing the OK key.
➭ Change the respective value using the
[h:mm:ss].
➭ Acknowledge the change with the OK key. The entry cursor
once again marks the entire parameter line.
scroll keys.
scroll key.
scroll keys.
scroll keys
> General Setup
Memory Recording Time
[h:mm:ss]
GMC-I Messtechnik GmbH17
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