Operating Instructions
METRAHITT-COM PLUS
Cable Multimeter for Measurements in Symmetrical Copper Cable Networks
3-349-560-03
7/8.17
Standard Equipment – Contact Persons
Standard Equipment
1 Cable multimeter
1 Protective rubber cover
1 KS21-T cable set (1000 V CAT III) consisting of:
one 2-conductor measurement cable (yellow/blue), 2 meters long,
with test probes, 1 earth terminal cable (black), 2 meters long,
with test probe
1
2
1
DAkkS calibration certificate with calibration report
Batteries, 1.5 V, type AA, installed
Condensed operating instructions *
* Detailed operating instructions are available for download on the Internet
at www.gossenmetrawatt.com.
2
GMC-I Messtechnik GmbH
Standard Equipment – Contact Persons
Accessories (sensors, plug inserts, adapters, consumable materials)
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 at the following web address along
with photo, order number, description and, depending upon the
scope of the respective accessory, data sheet and
operating instructions:
www.gossenmetrawatt.com
See also chapter 11 on page 72.
Product Support
If required please contact:
GMC-I Messtechnik GmbH
Product Support Hotline
Phone: +49 911 8602-0
Fax:
+49 911 8602-709
e-mail support@gossenmetrawatt.com
Software Enabling for METRAwin 10
GMC-I Messtechnik GmbH
Front Office
Phone: +49 911 8602-111
Fax:
+49 911 8602-777
e-mail: info@gossenmetrawatt.com
Manufacturer
If required please contact:
GMC-I Messtechnik GmbH
Südwestpark 15
90449 Nürnberg, Germany
GMC-I Messtechnik GmbH
3
Standard Equipment – Contact Persons
Recalibration Service
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. and offer you test equipment management free of charge.
Repair and Replacement Parts Service
Calibration Center* and Rental Instrument Service
If required please contact:
GMC-I Service GmbH
Service Center
Thomas-Mann-Str. 20
90471 Nuremberg, Germany
Phone: +49 911 817718-0
Fax:
+49 911 817718-253
E-mail service@gossenmetrawatt.com
www.gmci-service.com
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 for the
Federal Republic of Germany) in accordance with DIN EN ISO/IEC
17025 under registration number D-K-15080-01-01.
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 lab, we can calibrate instruments from
other manufacturers as well.
This address is only valid in Germany. Please contact our
representatives or subsidiaries for service in other countries.
* DAkkS Calibration Laboratory for Measured Electrical Quantities
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
4
GMC-I Messtechnik GmbH
Standard Equipment – Contact Persons
GMC-I Messtechnik GmbH
5
Table of Contents
Contents
Page
Contents
Page
1
Safety Features and Precautions ....................................... 8
5
1.1
1.2
1.3
Use for Intended Purpose ................................................................10
Meanings of Danger Symbols ..........................................................10
Meanings of Acoustic Warning Signals ............................................10
2
Operating Overview
– Connections, Keys, Rotary Switch, Symbols
5.1 Voltage Measurement ....................................................................26
5.1.1 Direct and Pulsating Voltage Measurement, V DC and V (DC+AC) .....27
5.1.2 Alternating Voltage and Frequency Measurement V AC and Hz
with Selectable Low-Pass Filter .......................................................28
5.2 Resistance Measurement, Ohm ......................................................30
5.3 Temperature Measurement – Temp RTD .........................................31
5.3.1 Measurement with Resistance Thermometers ..................................31
5.4 Continuity Test ..............................................................................33
5.5 Diode Testing with 1 mA Constant Current .....................................34
5.6 Capacitance Measurement ............................................................35
5.6.1 Cable Length Measurement m ........................................................35
5.7 Current Measurement ....................................................................36
5.7.1 Direct and Pulsating Current Measurement, Direct Connection,
A DC and A (DC+AC) ......................................................................37
5.7.2 Alternating Current and Frequency Measurement,
Direct Connection, A AC and Hz ......................................................38
5.7.3 Direct and Pulsating Current Measurement
with Clip-On Current Sensor, A DC and A (DC+AC) ..........................39
5.7.4 Alternating Current Measurement with Clip-On Current Sensor,
A AC and Hz ..................................................................................40
..................... 12
3
Initial Start-Up .................................................................. 16
3.1
3.2
3.3
3.4
Batteries ........................................................................................16
Activation .......................................................................................16
Setting the Operating Parameters ....................................................16
Switching the Instrument Off ...........................................................17
4
Control Functions ............................................................. 18
4.1
4.1.1
4.1.2
4.1.3
4.2
4.3
4.3.1
4.3.2
4.4
4.4.1
4.5
Selecting Measuring Functions and Measuring Ranges .....................18
Automatic Range Selection .............................................................18
Manual Measuring Range Selection .................................................18
Quick Measurements ......................................................................19
Zero Offset / Relative Measurements ...............................................19
Display (LCD) .................................................................................20
Digital Display ................................................................................20
Analog Display ...............................................................................20
Measured Value Storage: DATA (auto-hold / compare) ......................21
Saving Minimum and Maximum Values – MIN/MAX Function ............22
Measurement Data Recording .........................................................23
6
6
Measurements ................................................................. 26
Measurements in Symmetrical Copper Cable Networks .. 42
6.1
6.2
6.3
“RSL” Loop Impedance Measurement with 2 mA Constant Current ....42
Detection of Interference Voltages ...................................................43
Insulation Resistance Measurement:
in Telecommunications Networks – MISO Function .......................43
6.3.1 Connecting the Measurement Cables ..............................................44
6.3.2 Selection of Test Voltage or Galvanic Signature ................................44
6.3.3 Performing Insulation Resistance Measurements ..............................45
GMC-I Messtechnik GmbH
Table of Contents
Contents
Page
6.3.4 Ending the Measurement and Discharging ...................................... 46
6.4 Interference-immune Capacitance Measurement
in Telecommunications Networks – CAP Function ............................ 47
6.4.1 Cable Length Measuremnemt m ..................................................... 47
6.5 Galvanic Signature Recognition in Selector Switch Positions a-b ....... 49
7
Device and Measuring Parameters ................................... 52
7.1
7.2
7.3
7.4
7.5
Paths to the Various Parameters .................................................... 53
List of All Parameters .................................................................... 53
Querying Parameters – InFo Menu (as moving letters) ...................... 54
Entering Parameters – SETUP Menu ............................................... 54
Default Settings ............................................................................. 57
8
Interface Operation ........................................................... 58
8.1
8.2
Activating the Interface ................................................................... 58
Configuring Interface Parameters .................................................... 59
9
Technical Data ................................................................ 60
10
Maintenance and Calibration ............................................ 68
10.1
10.2
10.3
10.4
10.5
10.6
10.7
Displays – Error Messages ............................................................ 68
Batteries ....................................................................................... 68
Fuses ............................................................................................ 69
Housing Maintenance .................................................................... 70
Return and Environmentally Sound Disposal .................................... 70
Recalibration ................................................................................. 71
Manufacturer’s Guarantee .............................................................. 71
GMC-I Messtechnik GmbH
Contents
11
Page
Accessories (Standard Equipment See Page 2) ................72
11.1 General ......................................................................................... 72
11.2 Technical Data for Measurement Cables
(scope of delivery: KS21-T safety cable set) .................................... 72
11.3 Power Pack NA X-TRA ................................................................... 72
11.4 Interface Accessories ..................................................................... 73
12
Index .................................................................................74
7
Safety Warnings
1
Safety Features and Precautions
You have selected an instrument which provides you with a high
level of safety.
This instrument fulfills the requirements of the applicable EU
guidelines and national regulations. This is confirmed by means of
the CE mark. A corresponding declaration of conformity can be
requested 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 61010–1:2011 /VDE 0411–1:2011.
When used for its intended purpose (see page 10), 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 is imperative that you read the operating instructions
thoroughly and carefully before placing your instrument into service, and
that you follow all instructions contained therein.
8
Measuring Categories and their Significance per IEC 61010-1
CAT
Definition
I
Measurements in electrical circuits which are not directly connected to the
mains: e.g. electrical systems in motor vehicles and aircraft, batteries etc.
II
Measurements in electrical circuits which are electrically connected to the
low-voltage mains: via plug, e.g. in household, office and laboratory applications
III
Measurements in building installations: stationary consumers, distributor
terminals, devices connected permanently to the distributor
The measuring category and the maximum rated voltage which
are printed on the device apply to your measuring instrument, e.g.
600 V CAT II.
For the application of measuring cables see page 72.
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 contact hazards and taking the
appropriate safety precautions. Contact hazards according to
the standards exist anywhere, where voltages of greater than
33 V RMS or 70 V DC may occur. Avoid working alone when
taking measurements which involve contact hazards. Be
certain that a second person is present.
• Maximum allowable voltage between the voltage measuring
sockets or all connector sockets and ground is 600 V for measuring category II, and 300 V for measuring category III.
• Be prepared for the occurrence of unexpected voltages at
devices under test (e.g. defective devices). For example,
capacitors may be dangerously charged.
GMC-I Messtechnik GmbH
Safety Warnings
• 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 9; “Technical Data” in the table entitled
“Measuring Functions and Measuring Ranges” in the
“Overload Capacity” column.
• The multimeter may only be operated with installed batteries or
rechargeable batteries. Dangerous currents and voltages are
otherwise not indicated, and the instrument may be damaged.
• The instrument may not be operated if the fuse cover or the
battery compartment lid 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 600 V AC/DC.
Use specified fuses only (see page 64)! The fuse must have a
breaking capacity of at least 10 kA.
GMC-I Messtechnik GmbH
Opening of Equipment / Repair
The equipment may be opened only by authorized service personnel to ensure the safe and correct operation of the equipment
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 personnel,
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
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.
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 64).
9
Safety Warnings
1.1 Use for Intended Purpose
• The respective 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 5 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 64 and the table on page 8
regarding significance).
• Overload limits may not be exceeded. See technical data on
page 60 for overload values and overload limits.
• Measurements may only be performed under the specified
ambient conditions. See page 64 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 66).
10
1.2
!
Meanings 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
1.3
Meanings of Acoustic Warning Signals
Voltage warning: > 620 V (intermittent acoustic signal)
Current warning: > 1.2 A (continuous acoustic signal)
GMC-I Messtechnik GmbH
Safety Warnings
GMC-I Messtechnik GmbH
11
Operating Overview – Connections, Keys, Rotary Switch, Symbols
2
Operating Overview
– Connections, Keys, Rotary Switch, Symbols
15
Chap. 3.1 
16 Chap. 8
1 Chap. 4.3
Chap. 7 14
2 Chap. 4.1.2
Chap. 3 13
3 Chap. 3
Chap. 7 12
4 Chap. 5
5 Chap. 7
11
Chap. 4.4 
6 Chap. 3 ff.
7 Chap. 1.2
8 Chap. 3
9 Chap. 4.1
10
Chap. 4.1 
Max. 600 V!
12
1 Display (LCD) (see page 13 for significance of symbols)
2 MAN / AUTO shift key for manual/automatic measuring range selection
 Increase parameter values / M ISO: Test voltage 10 V/100 V/signature
“Operating Mode” menu: Selection of individual menu entries against
the direction of flow
3 ON / OFF | LIGHT key for switching device and display illumination on and off
4 FUNC | ENTER multifunction key
“Operating Mode” menu: Acknowledge entry (ENTER)
Insulation resistance measurement
U ISO ON / OFF
Key for switching insulation resistance measurement on and off
5  Increase measuring range or move decimal point to the right (MAN function)
6 Rotary switch for measuring functions (see page 14 for significance of symbols)
7 DAkkS calibration mark
8 Connector socket for ground / connected to ground
9 Connector socket for current measurement with automatic blocking
10 Connector socket for voltage, resistance, temperature, diode and
capacitance measurement with automatic blocking
11 DATA / MIN / MAX
Key for freezing, comparing, deleting the measured value, and for Min/Max function
 Decrease values / M ISO: Test voltage 10 V/100 V/signature
“Operating Mode” menu: Select individual menu entries in flow direction
12 MEASURE | SETUP Key for switching between measuring and menu functions
13 ZERO | ESC
Key for zero balancing
“Operating Mode” menu: Exit menu level and return to a higher level, exit
parameters entry function without saving
POL / U ISO CAP: Insulation resistance measurem. / CAP: Capacitance measurement
Press and hold key to reverse the polarity of the cable under
test; prerequisite: rotary switch set to M ISO (a-b)(a-E)(b-E)
14  Decrease measuring range or move decimal point to the left (MAN function)
15 Power pack connector jack
16 Infrared interface
GMC-I Messtechnik GmbH
Operating Overview – Connections, Keys, Rotary Switch, Symbols
Symbols used in the Digital Display
1 2 3 4 5
6
7
8
9
10
12
12
14
15
25
24
1
2
3
4
5
6
7
8
15
23
16
17
21
Battery level indicator
22
18
20
19
Battery full
Battery OK
Battery weak
Battery (almost) dead, U < 1.8 V
Interface indicator
Data transmission to /  from the multimeter is active
IR interface in standby mode
(ready to receive starting commands)
GMC-I Messtechnik GmbH
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
Battery level indicator
ON: continuous operation (automatic shutdown deactivated)
MAN: manual measuring range selection active
Digital display with decimal point and polarity display
max/min: Min/Max value storage
DATA: display memory, “freeze measured value”
STORE: memory mode active
ISO: insulation resistance measurement (if blinking active) /
selected test voltage 10 V or 100 V
1: x current clip factor (transformation ratio)
IR: infrared interface display
Scale for analog display
Pointer for analog display (bar graph – pointer)
depending upon setting in SETUP menu for the A.d iSP parameter
triangle appears: indicates overranging
RSL: loop impedance measurement selected
Diode measurement selected
Selected type of current
TRMS measurement
Pt100(0): selected platinum resistance thermometer with
automatic recognition of Pt100/Pt1000
No function
sec (seconds): unit of time
REL: relative measurement with reference to offset
Unit of measure
ZERO: zero balancing active
Warning regarding dangerous voltage: U > 15 V AC or U > 25 V DC
Continuity test with acoustic signal active
h (hours): unit of time
13
Operating Overview – Connections, Keys, Rotary Switch, Symbols
Symbols used for Rotary Switch positions
Switch
FUNC
Display
Measuring Function
V~
0/4
V~ AC TRMS
Alternating voltage, AC TRMS, full bandwidth
Hz (V)
1
Hz ~ AC
Voltage frequency, full bandwidth
V~ 200 Hz
Hz (V) 200 Hz
2
V Fil ~ AC TRMS
Alternating voltage, AC TRMS, with low pass filter (200 Hz)
3
Hz Fil ~ AC
Voltage frequency, with low pass filter (200 Hz)
V
0/2
V
DC
Direct voltage
V
1
V
DC AC TRMS
Pulsating voltage, TRMS ( V ACDC =
RSL
0/3
RPE
1

2
V
V
2
AC
+V
2
DC )
Loop impedance measurement with acoustic signal where I is constant
Continuity test with acoustic signal
DC
Diode voltage where I is constant

0/2

(DC) resistance
Temp. RTD
1
C Pt 100/1000
Temperature with Pt 100 / Pt 1000 resistance thermometer
0/2
nF
Capacitance
m (km)
1
m (km)
Cable length (via capacitive linear electric constant)
a-b, a-E, b-E
0/2
V
Extraneous voltage test
MISO@10V/100V 1
ISO 100 V / kM
Insulation resistance measurement:
CAP
*
nF
A
0/2
A
DC
A
1
A
DC AC TRMS
A~
0/2
A~ AC TRMS
Alternating current amperage, AC TRMS
Hz (A)
1
Hz ~ AC
Current frequency
A
0/2
A
DC
DC amperage with AC DC clip-on current sensor, 1 V:1/10/100/1000 A
A
1
A
DC AC TRMS
A
0/2
A~ AC TRMS
Alternating current amperage, TRMS, with clip-on current sensor, see above
Hz ~ AC
Current frequency with clip-on current sensor, see above
Hz (
1
A)
* POL / U ISO CAP:1
14
Interference-immune capacitance measurement in selector switch positions (a-b)(a-E)(b-E)
Direct current value
Pulsating current amperage, AC DC TRMS
Pulsating current amperage, TRMS, with AC DC clip-on current sensor, see above
GMC-I Messtechnik GmbH
Operating Overview – Connections, Keys, Rotary Switch, Symbols
User Interface Symbols in the Following Chapters
 ... 
Scroll through main menu
 ... 
Scroll through submenu

Select decimal point

Increase/decrease value
time
Submenu/parameter (7-segment font)
1nFo
Main menu (7-segment font, boldface)
Position of the power pack adapter socket,
see also chapter 3.1.
5 V / 600 mA
Fuse for current measuring ranges (see chapter 10.3)
The 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 10.5).
Symbols on the Device
!
Warning concerning a point of danger
(attention: observe documentation!)
Calibration mark (blue seal):
XY123
Ground
D-K15080-01-01
2012-08
CAT II / III Measuring category II or III device, see also
“Measuring Categories and their Significance per IEC
61010-1” on page 8.
Serial number
German Accrediation Body GmbH – Calibration lab
Registration number
Date of calibraion (year – month)
See also “Recalibration” on page 71.
Continuous, doubled or reinforced insulation
Indicates EC conformity
▲ IR ▼
Position of the infrared interface, window on the top of the
instrument
GMC-I Messtechnik GmbH
15
Initial Start-Up – Setup
3
Initial Start-Up
3.1 Batteries
Be certain to refer to chapter 10.2 regarding correct battery
installation!
Momentary battery voltage can be queried in the “Info” menu (see
chapter 7.3).
!
Attention!
Disconnect the instrument from the measuring circuit before opening the battery compartment lid in order to replace the batteries.
Display Illumination
After the instrument has been switched on, background illumination can be activated by briefly pressing the ON / OFF | LIGHT key. Illumination is switched back off by once again pressing the same
key, or automatically after approximately 1 minute.
Switching the Instrument On with a PC
The multimeter is switched on after transmission of a data block
from the PC, assuming the “irStb” parameter has been set to “ir
on” (see chapter 7.4).
However, we recommend using the power saving mode: “iroff”.
Operation with Power Pack (not included, see chapter 11.3) *
Installed batteries are disconnected electronically if the NA X-TRA
power pack is used, and need not be removed from the
instrument. If rechargeable batteries are used, they must be
recharged externally.
If the external power supply is switched off, the device is switched
to battery operation without interruption.
* for highly sensitive impedance measurements (R/C) we recommend
battery operation
3.2
Activation
Switching the Instrument On Manually
➭ Press the ON / OFF | LIGHT key until the display appears.
Power-up is acknowledged with a brief acoustic signal. As
long as the key is held depressed, all of the segments at the
liquid crystal display (LCD) are illuminated.
The LCD is depicted on page 13.
The instrument is ready for use as soon as the key is released.
16
Note
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 10.2).
3.3
Setting the Operating Parameters
Setting Time and Date
See “t iME” and “dAtE” parameters in chapter 7.4.
Display Modes for the Analog Display
Selection can be made from two different display modes
(see “A.d iSP” parameter in chapter 7.4).
Display Modes for the Digital Display
Selection can be made from two different display modes
(see “0.d iSP” parameter in chapter 7.4).
GMC-I Messtechnik GmbH
Initial Start-Up – Setup
3.4
Switching the Instrument Off
Switching the Instrument Off Manually
➭ Press the ON / OFF | LIGHT key until 0FF appears at the display.
ON / OFF
LIGHT
Shutdown is acknowledged with a brief acoustic signal.
Automatic Shutdown
The instrument is switched off automatically if the measured value
remains unchanged for a long period of time (maximum measured
value fluctuation of approximately 0.8% of the measuring range
per minute or 1 C or 1 F 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 (see “APoFF” parameter on page 53).
Shutdown is acknowledged with a brief acoustic signal.
Exceptions include:
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).
8.8.8.8
Auto-Range
ON / OFF
LIGHT
00.00
Illumination On
ON / OFF
LIGHT
Disabling Automatic Shutdown
The instrument can be set to continuous operation.
00.00
Illumination Off
➭ Simultaneously press the
ON / OFF
LIGHT
and
FUNC
ENTER
keys to this end.
The “Continuous On” function is indicated at by means of the
display to the right of the battery symbol.
The “Continuous On” setting can only be cancelled by changing the
respective parameter, and not by switching the instrument off
(see “APoFF” on page 55).
ON
GMC-I Messtechnik GmbH
ON / OFF
LIGHT
long
(1 s)
0ff
17
Control Functions
4
Control Functions
4.1
Selecting Measuring Functions and Measuring Ranges
Overview: Auto-Ranging and Manual Range Selection
Function
Display
MAN
4.1.1 Automatic Range Selection
The multimeter is equipped with auto-ranging for all measuring
functions, except for temperature measurement, and 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.
MAN / AUTO
Manual mode active:
utilized measuring range is fixed
 or 
Range switching sequence for:
V:
300 mV* 3 V 30 V 300 V 600 V
Hz:
300 Hz 3 kHz 30 kHz 300 kHz (Hz(U))
:
300 3 k 30 k300 k 3 M 30 M
A:
300A 3 mA 30 mA 300 mA 1A
A : See chapter 5.7.3 und chapter 5.7.4
F
: 30 nF 300 nF 3F 30F 300F
MISO: 300 k 3 M 30 M 300 M
F CAP: 300 nF 3F 10F
MAN
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).
MAN / AUTO
Return to automatic measuring range selection
—
4.1.2 Manual Measuring 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
 key.
The instrument is automatically returned to range selection when
the MAN / AUTO key is pressed, the rotary switch is activated or the
instrument is switched off and back on again.
18
* Via manual measuring range selection only
The multimeter is held in the selected measuring range. If the
range limit is exceeded, 0L appears at the display. You should then
switch to the next higher measuring range with the help of
the  key.
Measurement type MISO: If the measured value is less than 10% of
the measuring range after manual measuring range selection, u r
(under range) appears at the display. You should then select the
next smaller measuring range with the help of the  key.
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Control Functions
4.1.3 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. selection of the measuring
range with the best resolution (see chapter 4.1.2)
or
• With the DATA function (see chapter 4.4). In this way, the
appropriate 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.
4.2 Zero Offset / Relative Measurements
Zero balancing or a reference value for relative measurements can
be stored to memory depending upon deviation from the zero
point:
Deviation from zero
– with short-circuited measurement cables for V, , A
– with open input for capacitance unit of measure: F
0 to 200 digits
> 200 to 1500 digits
Display
ZERO REL
REL
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.
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Zero balancing and reference value adjustment can be used for
auto-ranging, as well as for manual measuring range selection.
Zero Balancing
➭ Plug the measuring cables into the instrument and connect the
free ends to each other, except for capacitance measurement
in which case the ends of the cables are not connected to
each other.
➭ Briefly press the ZERO | ESC key.
The instrument acknowledges zero balancing with an acoustic
signal, and the “ZERO REL” symbol appears at the LCD. The
value measured at the moment the key is pressed serves as a
reference value.
➭ Zero balancing can be cleared by once again pressing the
ZERO | ESC key.
Note
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 10% in the
mV ranges).
Setting the Reference Value
➭ Plug the measuring cables into the instrument and measure a
reference value (max. 1500 digits).
19
Control Functions
➭ Briefly press the ZERO | ESC key.
The instrument acknowledges storage of the reference value
with an acoustic signal, and the “ZERO REL” or the “REL”
symbol appears at the LCD. 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 | ESC key.
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.
4.3
Display (LCD)
4.3.1 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 “0.d iSP” parameter can be used to determine whether leading zeros will be appear or be suppressed at the measured value
display (see chapter 7.4).
Overranging
If the upper range limit of 3100 digits is exceeded “0L” (overload)
appears at the display.
Exceptions: “0L” appears at the display as of 610.0 V in the case
of voltage measurement in the 600 V range, as of 5100 digits for
diode testing, and as of 1100 digits in the 1 A range.
20
4.3.2 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.
Two different display modes can be selected in the “SETUP” menu
with the help of the “A.d iSP” parameter (see chapter 7.4):
• Bar graph
• Pointer: the current measured value is tracked in real-time
The analog scale displays a negative range of 5 scale divisions for
the measurement of zero-frequency quantities, allowing for
precise observation of measured value fluctuation around zero. If
the measured value exceeds the negative range of 5 scale
divisions, polarity is reversed at the analog display.
Scaling of the analog scale is automatic. This is very helpful for
manual measuring range selection.
Overranging
Overranging in the positive range is displayed by means of the
right triangle symbol.
Refresh Rate
In the bar graph and pointer modes, the analog display is
refreshed 40 times per second.
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Control Functions
4.4 Measured Value Storage: DATA (auto-hold / compare)
An individual measured value can be automatically “frozen” with
the DATA function (auto-hold). This 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.
V, A, Hz F, %
100%
of Measuring Range
3000 digits
10%
t [s]
Activated
Save
Save
Reactivated
Condition
DATA
Function
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 one brief acoustic signal
is generated.
Activate
Press
DATA /
Min/Max
Display
DATA
Acoustic
Blinks
Once
Is displayed
Static
Once
Twice 2)
Stored
MV
Blinks
MV
Digital
Brief
V, A, F, Hz,
%
Save
(stabilized
measured
value)
Note
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, symbol: MAN).
The selected measuring range should not be manually
changed as long as the DATA function is active.
Measuring Measuring
Function
Signal
Response from Instrument

V, A, F, Hz,
%
Reactivate 1)

Change to
Min/Max
brief
Exit
long
> 10%
of R
0L
< 10%
of R
= 0L
See table in chapter 4.4.1
Is cleared Is cleared
Twice
1)
The DATA function is deactivated by pressing and holding the
DATA/MIN/MAX key (approx. 1 second), when the measuring
function is changed or when the instrument is switched off and
back on again.
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Reactivation results from falling short of specified measured value limits.
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.
Key: MV = measured value, R = measuring range
2)
21
Control Functions
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 is greater than 10% of the measuring range (= 3 V), and is thus
reliable above the background noise level. As soon as the
measured values 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.
4.4.1 Saving Minimum and Maximum Values – MIN/MAX Function
Minimum and maximum measured values applied to the
measuring instrument’s input after the Min/Max function has been
activated can be “frozen” at the display. The most important use
of this function is the determination of minimum and maximum
values during long-term measured value observation.
The Min/Max function can be activated in all measuring functions.
The Min/Max function has no effect on the analog display, at
which the current measured value continues to appear.
Apply the measured quantity to the instrument and set the
measuring range with the MAN / AUTO key before activating the
Min/Max function.
The Min/Max function is deactivated by pressing and holding the
DATA/MIN/MAX key (approx. 1 second), when the measuring
function is changed or when the instrument is switched off and
back on again.
Response from Instrument
Function
Min/Max
Press
DATA /
Min/Max
Min. and Max.
Measured Values
1
Activate
and save
2 x brief
Are
saved
2
Save and
display
Brief
Brief
Storage continues
in background,
new min. and max.
values are displayed.
Display
Aco
ustic
Signal
Measured
Value
Digital
Max.
Min.
Current
measured
value
Max
and
min
Twice
Saved min.
value
Min.
Once
Saved max.
value
Max.
Once
3
Return to
1
Brief
Same as 1,
stored values are not deleted
Same as 1
Same
Once
as 1
Stop
Long
Are deleted
Current
measured
value
Is
Twice
deleted
Note
As opposed to the DATA function, the Min/Max function can
also be used for temperature measurement.
22
GMC-I Messtechnik GmbH
Control Functions
4.5 Measurement Data Recording
The cable multimeter is capable of recording measurement data
using an adjustable sampling rate for long periods of time in the
form of measurement series. 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.
Stored measured values can subsequently be read out with the
help of METRAwin 10 software. The only prerequisite is a PC which
is connected by means of an interface cable to the
USB X-TRA bidirectional interface adapter, which is plugged onto
a cable multimeter. See also chapter 8, “Interface Operation”.
Memory Parameters Overview
Parameter
Page: Header
CLEAr
EMpty
0CCUP
rAtE
StArt
StoP
24: Clear Memory
24: Clear Memory – appears after CLEAr
The STORE Menu Function
➭ First set the sampling rate for memory mode operation (see
chapter 7.4 the rAtE parameter) , and then start memory mode
operation.
➭ First select the desired measuring function and an appropriate
measuring range.
➭ Check the battery charge level before starting long-term
measurement recordings (see chapter 7.3).
Connect the NA X-TRA power pack if required.
Starting Recording via Menu Functions
➭ Switch to the “SETUP” mode by pressing MEASURE | SETUP, and
select the “StorE” menu.
MEASURE
SETUP
1nFo  ...  StorE
FUNC
ENTER
000.0 %  StArt
FUNC
ENTER
24: Querying Memory Occupancy
54: rAtE – set the sampling rate
23: Starting Recording via Menu Functions
24: Ending Recording
➭ Memory mode operation is started by activating FUNC | ENTER.
STORE appears underneath the analog display and indicates
that the memory mode has been activated. “StoP ” appears at
the digital display.
➭ Press MEASURE | SETUP in order to return to the measuring
function.
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23
Control Functions
During Recording
STORE is displayed underneath the analog display during memory
mode operation, and memory occupancy can be monitored:
Querying Memory Occupancy
Memory occupancy can be queried during recording with the
help of the “1nFo” menu (see also chapter 7.3).
Memory occupancy range: 000.1% to 099.9%.
StoP  000.3%
MEASURE
SETUP
The following message appears as soon as memory is full:
“100.0%”.
In order to be able to observe measured values during recording,
switch to the measuring function by pressing MEASURE | SETUP.
The display is returned to the memory menu after once again
pressing MEASURE | SETUP.
A new memory block is created when another measuring function
is selected with the rotary switch or the FUNC | ENTER key. Data
storage then continues automatically.
Ending Recording
➭ “StoP” appears at the display after pressing MEASURE | SETUP.
StoP
FUNC
ENTER
start
FUNC
ENTER
bAtt:  ...  0CCUP %: 017.4 %
Memory occupancy can be queried before recording is started via
the “StorE” menu.
MEASURE
SETUP
1nFo  ...  StorE
FUNC
ENTER
017.4 %  StArt
Clear Memory
This function deletes all measured values from memory!
This function cannot be executed during memory mode
operation.
MEASURE
SETUP
 CLEAr
➭ Acknowledge the “StoP” display by pressing FUNC | ENTER.
STORE is cleared from the display indicating that recording has
been ended.
1nFo
1nFo  ...  StorE
FUNC
ENTER
FUNC
ENTER
017.4 %  StArt
empty
➭ Press MEASURE | SETUP in order to return to the measuring
function.
➭ Memory mode operation can also be exited by switching the
multimeter off.
24
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Control Functions
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25
Measurements: V/Hz –  –
5
Measurements
5.1
Voltage Measurement
– Temp –
– m – A/Hz
Notes Regarding Voltage Measurement
• The multimeter may only be operated with the batteries installed.
Dangerous voltages are otherwise not indicated, and the instrument
may be damaged.
• The multimeter may only be operated by persons who are
capable of recognizing contact hazards and taking the
appropriate safety precautions. Contact hazards exist
anywhere, where voltages of greater than 33 V RMS may
occur.
The test probes may only be only gripped up to the finger
guard. Do not touch the metallic test probes under any
circumstances.
• Avoid working alone when taking measurements which involve
contact hazards. Be certain that a second person is present.
• Maximum allowable voltage between terminals 9 or 10 and
ground (8) is 600 V for measuring category II, and 300 V for
measuring category III.
• Be prepared for the occurrence of unexpected voltages at
devices under test (e.g. defective devices). For example,
capacitors may be dangerously charged.
• 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.
26
• Be aware of the fact that dangerous voltage spikes are not displayed
during measurement with the low-pass filter.
We recommend measuring voltage without the low-pass filter first, in
order to be able to detect any dangerous voltages.
• Be absolutely certain that the measuring ranges are not
overloaded beyond their allowable capacities. Limit values are
included in chapter 9, “Technical Data”, in the table entitled
“Measuring Functions and Measuring Ranges” in the “Overload Capacity” column.
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Measurements: V/Hz –  –
5.1.1 Direct and Pulsating Voltage Measurement, V DC and V (DC+AC)
➭ Set the CL iP parameter to 0FF in the current clip setup menu.
Otherwise all measured values are displayed in amperes, and
are corrected by the amount resulting from the selected transformation ratio for an interconnected clip-on current sensor.
MEASURE
SETUP
FUNC
ENTER
1nFo  ...  SET
FUNC
ENTER
1 /10/100/1000 / 0ff
MEASURE
SETUP
...  SET
FUNC
ENTER
– Temp –
...  CL IP
020.00
V
FUNC
ENTER
 0ff
DC
V
DC
V
V
FUNC
ENTER
➭ In accordance with the voltage to be measured, turn the rotary
switch to V
or V .
➭ Connect the measurement cables as shown.
The “” connector jack should be grounded.
020.00
V
Make sure that a current measuring range (“A”) has not been
activated when the multimeter is connected for voltage
measurement! If the fuse’s blowing limits are exceeded as a result
of operator error, both the operator and the instrument are in
danger!
With the rotary switch in the V position, the multimeter is always in
the 3 V measuring range immediately after it is switched on. As
soon a the MAN / AUTO key is pressed, and assuming the
measured value is less than 280 mV, the multimeter is switched to
the mV measuring range.
FUNC
ENTER
V
rAtE  ...  CL IP
Note
An intermittent acoustic signal warns the operator if the
measured value exceeds the upper range limit in the 600 V
range.
– m – A/Hz
a
V
Temp
b
E
COM
mA A
AC
TRMS
Measuring ranges:
V= : 100 V610 V
V : 10 mV610 V
5 ranges: 300 mV, 3 V, 30 V,
300 V and 600 V
Max. 600 V 1 kHz
– (+)
+ (–)
Hz: 1 Hz  300 kHz
Pmax = 6 x 106 V x Hz
Warnings regarding dangerous voltage:
> 15 V AC or > 25 V DC:
230.0
> 620 V:
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27
Measurements: V/Hz –  –
– Temp –
– m – A/Hz
5.1.2 Alternating Voltage and Frequency Measurement V AC and Hz
with Selectable Low-Pass Filter
➭ Set the CL iP parameter to 0FF in the current clip setup menu.
Otherwise all measured values are displayed in amperes, and
are corrected by the amount resulting from the selected transformation ratio for an interconnected clip-on current sensor.
MEASURE
SETUP
FUNC
ENTER
1nFo  ...  SET
FUNC
ENTER
1 /10/100/1000 / 0ff
rAtE  ...  CL IP
FUNC
ENTER
➭ In accordance with the voltage or frequency to be measured,
turn the rotary switch to V~ or Hz.
➭ Connect the measurement cables as shown.
The “” connector jack should be grounded.
Voltage Measurement
Note
An intermittent acoustic signal warns the operator if the
measured value exceeds the upper range limit in the 600 V
range.
Make sure that a current measuring range (“A”) has not been
activated, when the multimeter is connected for voltage
measurement! If the fuse’s blowing limits are exceeded as a result
of operator error, both the operator and the instrument are in
danger!
➭ You can switch back and forth between voltage measurement
with and without low-pass filter.
Frequency Measurement
➭ Apply the measured quantity is the same way as for voltage
measurement.
➭ Manually select the measuring range for the voltage amplitude.
When the instrument is switched to frequency measurement,
the previously selected voltage measuring range remains active.
➭ You can switch back and forth between frequency
measurement with and without low-pass filter.
Repeatedly press the FUNC | ENTER multifunction key, until the
Hz or Hz/Fil unit of measure appears at the display.
Lowest measurable frequencies and maximum allowable
voltages are included in chapter 9, “Technical Data”.
Measurement with Low-Pass Filter
!
Attention!
Be aware of the fact that dangerous voltage spikes are not
displayed during this type of measurement (see also
“Voltage Comparator”.
We recommend measuring voltage without the low-pass
filter first, in order to be able to detect any dangerous
voltages.
A 200 Hz low-pass filter can be activated if required, in order to
filter out capacitively induced high frequency pulses of greater
than 200 Hz, for example when performing measurements at
cables, i.e. undesired voltages of greater than 200 Hz can be
suppressed.
➭ Repeatedly press the FUNC | ENTER multifunction key, until the V
or V/Fil unit of measure appears at the display.
28
GMC-I Messtechnik GmbH
Measurements: V/Hz –  –
An active low-pass filter is indicated by the Fil display. The
multimeter is automatically switched to manual measuring range
selection.
Specified measuring accuracy is not reached with signals of
greater than 100 Hz when the filter is active.
MEASURE
SETUP
...  SET
V~
Hz
a
b
V
Temp
E
COM
mA A
0230.6
0050.3
V~
AC
TRMS
AC
Hz
V~ with Filter
FUNC
ENTER
0229.9
!
V
Voltage Comparator for Displaying Dangerous Voltage
The input signal or measuring signal is checked by a voltage
comparator for dangerous spikes, because these do not appear
at the display when the low-pass filter is used.
At voltages of greater than 15 V AC or 25 V DC, a danger symbol
appears at the display:
.
 0ff
Hz
230.0
> 620 V:
FUNC
ENTER
– m – A/Hz
FUNC
ENTER
Warnings regarding dangerous voltage:
> 15 V AC or > 25 V DC:
...  CL IP
V
Measuring ranges:
V~: 10 mV610 V
5 ranges: 300 mV, 3 V, 30 V,
300 V and 600 V
Max. 600 V 1 kHz
Hz: 1 Hz  300 kHz
Pmax = 6 x 106 V x Hz
~
FUNC
ENTER
– Temp –
Hz with Filter
!
Fil
V~
AC
TRMS
200 Hz
FUNC
ENTER
0050.0
Hz
Hz
AC
200 Hz
Fil
FUNC
ENTER
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29
Measurements: V/Hz –  –
– Temp –
– m – A/Hz
5.2 Resistance Measurement, Ohm
➭ Disconnect supply power from the electrical circuit of the
device to be measured, and discharge all high-voltage
capacitors.
➭ Make sure that the device under test is voltage-free.
Interference voltages distort measurement results!
Refer to chapter 5.1.1 regarding testing for the absence of
voltage with the help of the direct voltage measurement.

0000.0

k
Temp
RTD
FUNC
ENTER
➭ Set the rotary switch to “”.
➭ Connect the device under test as shown.
0025.6
C
Note
Use short or shielded measurement cables in the case of
high-impedance resistance.
Temp
RTD
Pt1000
Measuring ranges: 0.1 k to 31 M
6 ranges: 300 3k30k, 300k, 3 Mand 30 M
Note
Resistance measurement „“ is not suitable for measurements in symmetrical copper cable networks. Use the loop
impedance measurement function instead, see chapter 6.1.
a
!
b
V
Temp
E
COM
mA A
0V!
Improving Accuracy by means of Zero Balancing
Cable resistance and contact resistance can be eliminated in all
measuring ranges by means of zero balancing (see chapter 4.2).
Rx
Rx
30
GMC-I Messtechnik GmbH
Measurements: V/Hz –  –
5.3 Temperature Measurement – Temp RTD
Temperature measurement is performed with a Pt100 or Pt1000
resistance thermometer (accessory, not included), which is connected to the voltage input.
Selecting the Unit of Measure for Temperature
MEASURE
SETUP
1nFo  ...  tEMP
FUNC
ENTER
°C / °F 
FUNC
ENTER
(°C = default setting)
– Temp –
– m – A/Hz
Automatic Compensation
➭ Acknowledge by pressing the ZERO | ESC key.
“Short leads” appears at the display.
If you prefer to enter cable resistance directly, you can skip the
following entry prompt.
➭ Short circuit the measuring instrument’s connector cables.
“000.0” appears at the display. After pressing the
FUNC | ENTER key, automatic compensation of cable
resistance is activated for all subsequent measurements.
The short-circuit can now be eliminated, and the device is
ready for use.
Enter Cable Resistance
5.3.1 Measurement with Resistance Thermometers
➭ Set the rotary switch to “” or “TempRTD”.
➭ Press the ZERO | ESC key once again in the automatic
compensation menu.
Press the FUNC | ENTER key in order to change to the other measuring function if required.
The sensor type, i.e. Pt100 or Pt1000, is detected automatically and
displayed.
There are two different ways to compensate for cable resistance:
➭ Enter the known resistance of the connector cables with the
scroll keys:
Select the digit to be changes with the  keys, and change
the respectively selected digit with the keys. The default
value is 0.43 . Values can be selected within a range of
0 to 50 .
➭ Upon pressing the FUNC | ENTER key, the selected value is activated and the display is returned to the measuring function.
Cable resistance remains in memory even after the instrument
has been switched off.
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31
Measurements: V/Hz –  –
– Temp –
– m – A/Hz

0000.0

k
Temp
FUNC
ENTER
RTD
Measuring ranges
RTD Pt100 -200.0  +850.0 C
RTD Pt1000 -150.0  +850.0 C
0025.6
C
FUNC
ENTER
RTD
Pt1000
ZERO
ESC
Short Leads
0000.0

a
b
V 
Temp
E
COM
RTD
Automatic
Compensation
ZERO
ESC
mA A
r00.05
FUNC
ENTER

Enter Cable Resistance
32
GMC-I Messtechnik GmbH
Measurements: V/Hz –  –
5.4 Continuity Test
➭ Disconnect supply power from the electrical circuit of the
device to be measured, and discharge all high-voltage
capacitors.
RSL
RSL
FUNC
ENTER
➭ Briefly press the yellow multifunction key FUNC | ENTER.
A loudspeaker symbol appears at the display.
Depending upon the selected limit value, the multimeter
generates a continuous acoustic signal in the case of continuity or
short-circuiting, i.e. at a value of less than the selected limit value.
“0L” appears at the display in the case of an open connection.
The limit value can be adjusted in the “SETUP” menu (see also
chapter 7.4):
RSL

”.
➭ Connect the conductor path under test as shown.
– m – A/Hz
0000.0
➭ Make sure that the device under test is voltage-free.
Interference voltages distort measurement results!
➭ Set the rotary switch to “RSL” or “
– Temp –
Measuring range:
R : 300 
(0.1  to 310 )
000.8

FUNC
ENTER
0.443
DC
V
MEASURE
SETUP
FUNC
ENTER
1nFo  ...  SET
FUNC
ENTER
1, 10, 20, 30, 40, 90  
rAtE  ...  bEEP
FUNC
ENTER
!
a
V
Temp
b
E
COM
mA A
0V!
(10 = default setting)
R < 1, 10, 20, 30, 40, 90 
GMC-I Messtechnik GmbH
33
Measurements: V/Hz –  –
– Temp –
– m – A/Hz
5.5 Diode Testing
with 1 mA Constant Current
➭ Disconnect supply power from the electrical circuit of the
device to be measured, and discharge all high-voltage
capacitors.
RSL
000.8
➭ Make sure that the device under test is voltage-free.
Interference voltages distort measurement results!
Refer to chapter 5.1.1 regarding testing for the absence of
voltage with the help of the direct voltage measurement.
➭ Set the rotary switch to “RSL” or “

FUNC
ENTER
”.
➭ Repeatedly press the FUNC | ENTER key until the diode
symbol appears at the display.
0.443
➭ Connect the device under test as shown.
Conducting Direction and Short-Circuit
The instrument displays the conducting-state voltage in volts
(display: 4 places). As long as voltage drop does not exceed the
maximum display value of 5.1 V, several series connected components or reference diodes can be tested with a small reference
voltage and Zener diodes.
Reverse Direction and Interruption
The measuring instrument indicates overload 0L.
Note
Resistors and semiconductor paths connected in parallel to
the diode distort measurement results!
34
DC
V
!
0V!
a
V
Temp
b
E
COM
Measuring range:
+
to 5.100 V
0.654
Forward Direction
mA A
–
0.L
Reverse Direction
GMC-I Messtechnik GmbH
Measurements: V/Hz –  –
5.6 Capacitance Measurement
➭ Disconnect supply power from the electrical circuit of the device to
be measured, and discharge all high-voltage capacitors.
➭ Make sure that the device under test is voltage-free.
Capacitors must always be discharged before measurement is
performed.
Interference voltages distort measurement results!
Refer to chapter 5.1.1 regarding testing for the absence of
voltage with the help of the direct voltage measurement.
➭ Set the rotary switch to “
”.
➭ Connect the (discharged!) device under test to the sockets
with the measurement cables as shown.
Note
The “–” pole of polarized capacitors must be connected to the
“” jack.
Resistors and semiconductor paths connected in parallel to the
capacitor distort measurement results!
Note
This function is to be used espcecially for the measurement
of components. For telecommunications networks, the special capacitance measurement is recommended, see chapter 6.4
GMC-I Messtechnik GmbH
– Temp –
– m – A/Hz
5.6.1 Cable Length Measurement m
In the cable length measuring mode, the instrument calculates
length as a function of the capacitance value entered by the user:
Length (km) =
measured capacitance (nF)
capacitance value (nF / km)
Preparation and execution of this measurement is the same as for
capacitance measurement.
➭ Press the yellow multifunction key FUNC | ENTER.
“k” and “m” (i.e. kilometers) appear at the display instead
of “F”.
Refer to chapter 7.4 with regard to adjusting the “CAP” scaling
factor (capacitive linear electric constant).
Note
When measuring cable length, make sure that the cable
parameters (e.g. cross-section) are identical. Varying cable
parameters, for example interconnected cables of varying
type or cross-section, distort measurement results.
Note
This function is to be used espcecially for the measurement
of components. For telecommunications networks, the special cable length measurement is recommended, see chapter 6.4.1
35
Measurements: V/Hz –  –
– Temp –
– m – A/Hz
5.7
10.38
F
m
FUNC
ENTER
15.00
!
k
0V!
m
m
a
b
V
Temp
E
COM
mA A
+
b
E
COM
mA A
–
+
–
a
V
Temp
Measuring range: 10 pF to 300 F
5 ranges: 30 nF, 300 nF,
3 F, 30 F and 300 F
Measuring ranges:
3.100 km / 31.000 km
36
Current Measurement
Notes Regarding Current Measurement
• The multimeter may only be operated with installed batteries or
rechargeable batteries. Dangerous currents are otherwise not
indicated, and the instrument may be damaged.
• Set up the measuring circuit in a mechanically secure fashion,
and secure it against inadvertent breaks. Select conductor
cross-sections and lay out connections such that they do not
overheat.
• A continuous acoustic signal warns of current greater than 1.2 A.
• 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 600 V AC/DC.
Use specified fuses only! The fuse must have a breaking
capacity of at least 10 kA.
• If the fuse for the active current measuring range blows, “FUSE”
appears at the digital display, and an acoustic signal is
generated at the same time.
• If a fuse should blow, eliminate the cause of overload before
placing the instrument back into service!
• Fuse replacement is described in chapter 10.3.
• Be absolutely certain that the measuring ranges are not
overloaded beyond their allowable capacities. Limit values are
included in chapter 9, “Technical Data”, in the table entitled
“Measuring Functions and Measuring Ranges” in the
“Overload Capacity” column.
GMC-I Messtechnik GmbH
Measurements: V/Hz –  –
5.7.1 Direct and Pulsating Current Measurement, Direct Connection,
A DC and A (DC+AC)
➭ First disconnect supply power from the measuring circuit or
the power consumer (1), and discharge any capacitors.
➭ In accordance with the current to be measured, set the rotary
switch to A or A .
➭ Select the type of current appropriate for the measured
quantity by briefly pressing the FUNC | ENTER multifunction key.
Each time the key is pressed, the instrument is switched back
and forth between A DC and A (DC + AC)TRMS, which is indicated by means of an acoustic signal. The current type is indicated at the LCD by means of the DC or the (DC+AC)TRMS
symbol.
➭ Safely connect the measuring instrument (without contact
resistance) in series to the power consumer (2) as shown.
➭ Switch supply power to the measuring circuit back on (3).
➭ Read the display. Make a note of the measured value if the
instrument is not being operated in the memory mode or the
transmission mode.
A
– m – A/Hz
003.50
A
!
– Temp –
DC
A
DC
A
mA
Current measurement may
only be performed with
installed batteries!
FUNC
ENTER
88.8.8.8
003.50
mA
AC
TRMS
Measuring ranges:
A : 0.1 A . . . 1.1 A
A : 3 A . . . 1.1 A
5 ranges: 300 A, 3 mA, 30 mA, 300 mA and 1 A
a
V 
Temp
b
E
COM
mA A
➭ Disconnect supply power from the measuring circuit or the
power consumer (1) once again, and discharge any
capacitors.
➭ Remove the test probes from the measuring point and return
the measuring circuit to its normal condition.
2
1
3
~
~
Rx
GMC-I Messtechnik GmbH
!
I > 1.2 A
Current
Rx
37
Measurements: V/Hz –  –
– Temp –
– m – A/Hz
5.7.2 Alternating Current and Frequency Measurement,
Direct Connection, A AC and Hz
➭ First disconnect supply power from the measuring circuit or
the power consumer (1), and discharge any capacitors.
➭ In accordance with the current or frequency to be measured,
turn the rotary switch to A~ or Hz.
➭ Select the desired measured quantity by briefly pressing the
FUNC | ENTER multifunction key. Each time the key is pressed,
ACTRMS and Hz are alternately selected, and
switching is acknowledged with an acoustic signal.
➭ Safely connect the measuring instrument (without contact
resistance) in series to the power consumer as shown.
➭ Switch supply power to the measuring circuit back on (3).
➭ Read the display. Make a note of the measured value if the
instrument is not being operated in the memory mode or the
transmission mode.
➭ Disconnect supply power from the measuring circuit or the
power consumer (1) once again, and discharge any
capacitors.
A~
Hz
!
Current measurement
may only be performed
with installed batteries!
88.8.8.8
003.50
mA
FUNC
ENTER
0050.1
Hz
AC
Hz
Measuring ranges:
A ~: 3 A . . . 1.1 A
5 ranges: 300 A, 3 mA, 30 mA, 300 mA and 1 A
a
Hz: 1 Hz . . . 31 kHz
3 ranges: 300 Hz, 3 kHz and 30 kHz
V 
Temp
b
E
COM
➭ Remove the test probes from the measuring point and return
the measuring circuit to its normal condition.
2
1
3
~
mA A
!
I > 1.2 A
~
Rx
38
A~
AC
TRMS
Rx
Current
GMC-I Messtechnik GmbH
Measurements: V/Hz –  –
Transformer Output, Voltage/Current
When a clip-on current sensor is connected to the multimeter
(V input), all current displays appear with the correct value in
accordance with the selected transformation ratio. The only
prerequisite is that the current sensor is equipped with at least
one of the below listed transformation ratios, and that the ratio
has been previously selected in the following menu (Cl ip 0FF)
(see also chapter 7.4).
MEASURE
SETUP
FUNC
ENTER
V
0ff/1/10/100/1000 
CL IP
rAtE  ...  CL IP
300 mV
3V
 0ff
b
E
COM
DC
A
DC
A
A
FUNC
ENTER
mA A
1:1000
0035.0
Clip Type
A
30 V
AC
TRMS
Ri ~ 9 M
300.0 mA
3.000 A
30.00 A
WZ12C
1:10
1m V / 10 mA
3.000 A
30.00 A
300.0 A
WZ12B, Z201A/B,
METRAFLEX
3,000 kA
Z202A/B,
METRAFLEX
30.00 kA
Z202A/B, Z203A/B,
WZ12C,
METRAFLEX
1:1000
1 mV/1 A
0035.0
Ri
1:1
1 mV / 1 mA
1:100
1m V / 100 mA
a
V 
Temp
FUNC
ENTER
Measuring Ranges
FUNC
ENTER
...  CL IP
1:1000
V
1nFo  ...  SET
Trans. Ratio
FUNC
ENTER
...  SET
Current Clip Setup Menu
FUNC
ENTER
– m – A/Hz
taken into consideration (default value: Cl ip = 0ff = voltage display).
5.7.3 Direct and Pulsating Current Measurement
with Clip-On Current Sensor, A DC and A (DC+AC)
MEASURE
SETUP
– Temp –
30.00 A
300.0 A
300.0 A
3,000 kA
Measuring ranges:
mA / A: see table
~
Current
Rx
Maximum allowable operating voltage is equal to the current
transformer’s nominal voltage. When reading the measured value,
additional error resulting from the clip-on current sensor must also be
GMC-I Messtechnik GmbH
39
Measurements: V/Hz –  –
– Temp –
– m – A/Hz
5.7.4 Alternating Current Measurement with Clip-On Current Sensor,
A AC and Hz
Transformer Output, Voltage/Current
When a clip-on current sensor is connected to the multimeter
(V input), all current displays appear with the correct value in
accordance with the selected transformation ratio. The only
prerequisite is that the current sensor is equipped with at least
one of the below listed transformation ratios, and that the ratio
has been previously selected in the following menu (Cl ip 0FF)
(see also chapter 7.4).
taken into consideration (default value: Cl ip = 0ff = voltage display).
MEASURE
SETUP
FUNC
ENTER
...  SET
V~
FUNC
ENTER
FUNC
ENTER
1nFo  ...  SET
0ff/1/10/100/1000 
Trans. Ratio
CL IP
1:1
1 mV / 1 mA
rAtE  ...  CL IP
0035.0
Hz
A
b
V 
Temp
E
COM
A~
FUNC
ENTER
1:1000
0050.1
Clip Type
300 mV
3V
30 V
300.0 mA
3.000 A
30.00 A
WZ12C
Hz
AC
Hz
Ri ~ 9 M
3.000 A
30.00 A
300.0 A
WZ12B, Z201A/B,
METRAFLEX
1:100
1m V / 100 mA
30.00 A
300.0 A
3,000 kA
Z202A/B,
METRAFLEX
30.00 kA
Z202A/B, Z203A/B,
WZ12C,
METRAFLEX
3,000 kA
AC
TRMS
mA A
Ri
Measuring Ranges
300.0 A
a
FUNC
ENTER
1:10
1m V / 10 mA
1:1000
1 mV/1 A
 0ff
1:1000
Current Clip Setup Menu
MEASURE
SETUP
FUNC
ENTER
...  CL IP
Measuring Ranges:
~
Current
mA / A: see table
Hz: 1 Hz . . . 31 kHz
3 ranges: 300 Hz, 3 kHz and 30 kHz
Rx
Maximum allowable operating voltage is equal to the current
transformer’s nominal voltage. When reading the measured value,
additional error resulting from the clip-on current sensor must also be
40
GMC-I Messtechnik GmbH
Measurements: V/Hz –  –
GMC-I Messtechnik GmbH
– Temp –
– m – A/Hz
41
Measurements RSL – MISO@10 V/100 V – CAP
6
Switch positions (a-b) (a-E) (b-E)
Measurements in Symmetrical Copper Cable Networks
6.1 “RSL” Loop Impedance Measurement with 2 mA Constant Current
➭ Disconnect supply power from the electrical circuit of the
device to be measured, and discharge all high-voltage
capacitors.
RSL
Measuring Ranges:
RSL: 300 /3 k
(0,1  ... 3,1 k)
00.000
RSL
RSL
k
➭ Make sure that the device under test is voltage-free.
Interference voltages distort measurement results!
FUNC
ENTER
➭ Set the rotary switch to RSL.
RSL appears at the display.
000.8
➭ Connect the measuring point under test as shown.

Depending upon the selected limit value / threshold, the
multimeter generates a continuous acoustic signal if the
respective value is exceeded.
“0L” appears at the display in the case of an open connection.
The limit value can be adjusted in the “SETUP ” menu (see also
chapter 7.4):
FUNC
ENTER
0.443
DC
V
MEASURE
SETUP
FUNC
ENTER
1nFo  ...  SET
FUNC
ENTER
rAtE  ...  r_sl
> 100, 200 , 2 ... 3 k, 0L 
FUNC
ENTER
(2 = default setting)
!
a
b
V
Temp
E
COM
mA A
0V!
Rx
Note
This measurement is particularly geared to the measurement in copper cable networks.
42
Rx
RSL > 100, 200 , 2 ... 3 k, OL
GMC-I Messtechnik GmbH
Measurements RSL – MISO@10 V/100 V – CAP
Switch positions (a-b) (a-E) (b-E)
6.2 Detection of Interference Voltages
➭ Set the rotary switch to the a-b, a-E and b-E positions, one
after the other, in order to display any interference voltage for
all three conductor pairs.
Note
Insulation resistance may only be measured at voltage-free
devices.
UISO
M
a-b
a-E
b-E
ISO 100V
000.0
V
ISO
@10V/100V
DC
UISO
AC
TRMS
Interference Voltage Detection
6.3
Insulation Resistance Measurement:
in Telecommunications Networks – MISO Function
Three jacks (a, b and E) are provided for measurements in
symmetrical copper cable networks with two conductors and a
shield. The rotary selector switch can be set to determine whether
insulation testing will be performed between a and b, a and E or
b and E.
Interruption of a single core or contact with an open-circuit core
(capacitive asymmetry) can be recognized by switching rapidly
with the POL / U ISO key.
In the event of a good cable, the bar graph must be identical in the
a-E and b-E selector switch positions (open-circuit cable only!).
Long cable: long bar graph display
Short cable: short bar graph display
The overall length of the bar graph represents a range of
capacitance from 50 nF to 100 nF.
Measuring Range:
V : 6,0 V110,0 V
Note
Insulation resistance measurement with 10 V test voltage
The measuring range of the digital display is limited to
30 M.
Exceeding values are shown as „OL“.
In contrast, the bargraph serves as a trend indicator and displays values up to 100 M, however, without any specified
accuracy.
GMC-I Messtechnik GmbH
43
Measurements RSL – MISO@10 V/100 V – CAP
Switch positions (a-b) (a-E) (b-E)
6.3.1 Connecting the Measurement Cables
Note
Testing the Measurement Cables
The test probes at the ends of the measurement cables
should be short circuited before performing insulation
resistance measurements with the selector switch in the 
or the
position, in order to make sure that a value close
to 0  is displayed at the instrument. Incorrect connection or
a broken measurement cable can be detected in this way.
➭ Cable connection:
Connect the measurement cables to jacks a, b and E.
6.3.2 Selection of Test Voltage or Galvanic Signature
In the interference voltage detection mode you can select test
voltages of 10 V or 100 V with the  or  key. The selected test
voltage is shown as a segment above the digital display, the signature recognition mode is shown as a digital display.
UISO
a-b
a-E
b-E
ISO 10 V
000.0
V
M
ISO
@10V/100V
DC
UISO
AC
TRMS
MAN / AUTO
DATA/MIN/MAX
Short-circuit the measuring cables
a
a
b
a
V
Temp
ISO 100 V
00.00
b
E
E

b
E
COM
mA A
MAN / AUTO
DATA/MIN/MAX
!
a
a
b
0V!
Rx
b
E
E
000.0
V
UISO
MAN / AUTO
DATA/MIN/MAX
sign
V
44
DC
AC
TRMS
DC
Signature
AC
TRMS
GMC-I Messtechnik GmbH
Measurements RSL – MISO@10 V/100 V – CAP
Switch positions (a-b) (a-E) (b-E)
6.3.3 Performing Insulation Resistance Measurements
UISO
M
a-b
a-E
b-E
ISO 100V
000.0
V
ISO
@10V/100V
UISO
DC
AC
TRMS
FUNC
ENTER
ISO 100V
000.00
M
M
Switch
test voltage on
a-b
a-E
b-E
FUNC
ENTER
UISO ON / OFF
FUNC
ENTER
UISO ON / OFF
FUNC
ENTER
UISO ON / OFF
Caution High-Voltage!
Do not touch the conductive ends of the test probes when the
instrument has been activated for the measurement of insulation resistance. If at all possible, only plug in the measurement
cables actually required for this test, because loose test probes
and cable ends represent a contact hazard. You may otherwise
be exposed to a current of 1.5 mA (limited in the measuring
instrument), and although this is not life endangering, the resulting electrical shock is quite discernible. If, on the other hand,
measurement is being performed on a capacitive device under
test, for example a cable, it may be charged up to approximately ±120 V. Touching the device under test after measurement has been performed is life endangering in this case!
➭ Starting the insulation resistance measurement:
Briefly press the U ISO ON / OFF key.
Insulation resistance is displayed for the currently selected
conductor pair (analog display is logarithmic).
➭ Reversing polarity of the cable under test:
Reverse polarity
+
–
POL / UISO
ZERO
ESC
POL / UISO
ZERO
ESC
POL / UISO
ZERO
ESC
FUNC
ENTER
UISO ON / OFF
FUNC
ENTER
UISO ON / OFF
FUNC
ENTER
UISO ON / OFF
–
+
–
a
a
b
+
Discharge
0V!
b
E
E
GMC-I Messtechnik GmbH
– Normal polarity reversal:
Press and hold the POL / U ISO key.
– Rapid polarity reversal:
Press the POL / U ISO key at short intervals. bAL.C appears at
the display (ballistic capacitance) for relative cable length
determination. After key activation has ceased for a period
of approximately 2 seconds, the instrument is switched
back to standard insulation resistance measurement.
➭ Switch the rotary selector switch to the MISO_a-b, MISO_aE and MISO_b-E positions, one after the other, in order to
execute the desired tests.
45
Measurements RSL – MISO@10 V/100 V – CAP
Auto-ranging is active during insulation resistance measurement.
If the measured value is less than 10% of the measuring range
after manual measuring range selection (see chapter 4.1.2), u r
(under-range) appears at the display. You should then select the
next smaller measuring range with the help of the  key.
Automatic Recognition of Interference Voltage During
Insulation Resistance Measurement (only in AUTORANGE Mode)
If, during insulation measurement, the instrument detects an
interference voltage of greater than 15 V AC or 25 V DC (assuming: Uinterference  UISO, Riq < 100 k), „Error“ is briefly displayed at the
LCD. The instrument is then automatically switched to voltage
measurement, and the currently measured voltage value is displayed.
Switch positions (a-b) (a-E) (b-E)
!
Attention!
If „Error“ appears at the display, the cable (the device under
test) is most likely capacitively charged to a
significant extent. Remedy: Short circuit conductors
a-b, a-E and b-E. Repeat the measurement.
6.3.4 Ending the Measurement and Discharging
➭ Briefly press the U ISO ON / OFF key.
After measurement has been completed, any remaining residual
voltage is displayed which may result from cable capacitance.
The instrument’s internal 120 k resistor causes rapid
discharging. However, contact to the device under test must be
maintained. The falling voltage value can be observed directly at
the LCD. Do not disconnect the device under test until the voltage value
has dropped to below 25 V!
Note
A polarity-dependent dead zone results in erroneous measurements for automatic interference voltage detection. The
dead zone lies within a range of 60 to 135 V DC ACTRMS
sinusoidal (in the case of an interference voltage whose
value is equal to that of measuring voltage, the two voltages
neutralize each other).
Manual switching to insulation resistance measurement is
disabled for as long as voltage is applied to the test terminals.
If interference voltage is no longer present, the MISO
measurement can be started by once again pressing the
U ISO ON / OFF key.
If a voltage of greater than 110 V DC AC is present, it is indicated by
means of an acoustic signal, as well as optically with the “U HI ”
symbol at the display.
46
Note
The instrument’s batteries are rapidly depleted during insulation
resistance measurement. Deactivate insulation resistance measurement between measurements for this reason. Use only
alkaline manganese batteries in accordance with IEC 6 LR61.
Note
Rotary selector switch positions a-b, a-E and b-E are
intended solely for the detection of interference voltage up to
110 V during insulation resistance measurement.
Voltage measurement may only be performed with the rotary
selector switch set to the V , V
or the V
position.
The DATA, MIN/MAX and ZERO functions are not available
in this case.
GMC-I Messtechnik GmbH
Measurements RSL – MISO@10 V/100 V – CAP
6.4
Interference-immune Capacitance Measurement
in Telecommunications Networks – CAP Function
Three jacks (a, b and E) are provided for measurements in symmetrical copper cable networks with two conductors and a shield. The rotary selector switch can be set to determine whether capacitance
testing will be performed between a-b, a-E or b-E.
In contrast to the capacitance measurement in selector switch
position
, the measured value is only affected to a minor degree by line interference and/or parallel resistance with this capacitance measurement method.
➭ Connect the measuring cables to jacks a, b and E
➭ Set the rotary switch to „a-b, a-E and b-E“, one after the other,
in order to display any interference voltage for all three conductor pairs, see also chapter 6.2.
➭ Press ZERO | ESC. The display switches from V to F. This conversion is accompanied by a double acoustic signal.
➭ Measure the capacitance successively in the 3 selector switch
positions.
➭ Return to the interference voltage detection mode by pressing
ZERO | ESC once more.
Note
„000.0 nF“ indicates a short circuit at the jacks.
Note
If an activated DSL modem/router is connected to the customer-side cable end emitting acoustic handshake signals,
the high level of the signals will interfere with the measurement when short leads (up to approx. 500 m) are used.
These signals can be attenuated by plugging on the signaGMC-I Messtechnik GmbH
Switch positions (a-b) (a-E) (b-E)
ture measuring adapter, thus making measurement possible. The capacitance of 100 nF of measuring adapter
SM100 must be taken into account for measurement.
6.4.1 Cable Length Measuremnemt m
In the cable length mode the instrument calculates the length as a
function of the capacitance value entered by the user:
Length (km) =
measured capacitance (nF)
capacitance value (nF/km)
➭ Connect the measurement cables to jacks a, b and E
➭ Set the rotary switch to „a-b, a-E and b-E“, one after the other,
in order to display any interference voltage for all three conductor pairs.
➭ Press ZERO | ESC. The display switches from V to F.
➭ Press multifunction key FUNC | ENTER. „k“ and „m“ are indicated
for km length instead of „F“ in the display.
➭ Measure the cable length successively in the 3 selector switch
positions.
➭ Return to the capacitance measuring mode by pressing
FUNC | ENTER once more.
Refer to chapter 7.4 for details on setting the scaling factor „CAP“
(capacitive linear electric constant) for cable length measurement.
Note
Please make sure that the cable parameters (e.g. cross sections) are identical when determining the cable lengths. Differing cable parameters, e.g. in the case of cables composed of different cable types or cross sections, distort the
measuring results.
47
Measurements RSL – MISO@10 V/100 V – CAP
UISO
a-b
a-E
b-E
Switch positions (a-b) (a-E) (b-E)
!
0V!
ISO 100V
000.0
V
+
–
CAP
a
DC
UISO
b
V
Temp
E
COM
mA A
AC
TRMS
POL / UISO CAP
ZERO
ESC
a
a
b
b
E
E
000.0
nF
SM100
F
Display for Short Circuit:
10.38
F
100 nF
(a-b)
(a-E)
(b-E)
Notes on using signature measuring adapter SM100 see previous
page!
Measuring Range: 1 nF ... 11 F
3 Ranges: 300 nF/ 3 F / 10 F
FUNC
ENTER
b
a
15.00
k
m
DSL
Modem
Router
m
a
V
Temp
b
E
COM
mA A
Measuring Ranges:
3,100 km / 31,000 km
48
GMC-I Messtechnik GmbH
Measurements RSL – MISO@10 V/100 V – CAP
U1
U2
R1
470n
6.8V
6.8V
100k
a
C1
Electrical circuit diagram of a DSL signature
➭ Set the rotary switch to „a-b“ in order to display any interference voltage.
➭ Select the signature recognition function „Sign“ with key 
or .
➭ Start measurement with the FUNC | ENTER key.
Measurement is now conducted with a voltage below the conducting-state voltage of the Zener diodes: „Lo V“ is therefore
shown in the display until the first measured value in the 300%
range is indicated. Since the measuring voltage is smaller than the
threshold voltage of the Zener diodes of the signature, only parasitic influences are indicated in this case: this value is therefore
subsequently designated as influence value.
If the influence value is stable, a high measuring voltage can be
selected by pressing and holding the ZERO | ESC key. This is indicated in the display with „Hi V“.
GMC-I Messtechnik GmbH
If a value between approximately +60 and +200% is shown in the
display, a signature exists, for values below +20%, however, no
signature exists. Since this value determines whether a signature
exists or not, it is subsequently designated as decision value.
The influence value last measured is taken into account for calculating the decision value: It is therefore of importance that the influence value is stable and remains within the applicable range
between –50% and +30%! The display blinks if the value is beyond that range.
b
6.5 Galvanic Signature Recognition in Selector Switch Positions a-b
Measuring function for the recognition of a galvanic signature
which may be contained in the connection cable of a DSL
modem/router.
Switch positions (a-b) (a-E) (b-E)
Notes
Prerequisites for the application of the signature measurement
Parallel resistance > 200 k, parallel capacitance < 1 μF,
Ripple voltage < 4 Vss 50 Hz
and exclusively high-resistance DC voltage
Passive test termination between a and b
A passive test termination leads to a deviation < 10% for both values and can thus be neglected for the signature recognition.
Signature at the output of a DSL splitter
If the signature is located at the output of a DSL splitter (operation
according to Annex B), it is not recognized due to the high-pass
filter in the splitter. If it is attached to the F jack (low-pass) by mistake, the signature is recognized nevertheless.
49
Measurements RSL – MISO@10 V/100 V – CAP
Switch positions (a-b) (a-E) (b-E)
NTBA connected
If an NTBA is connected, measurement is not possible as the
input circuit of the NTBA prevents recognition
(influence value = –OL)
DSL modem active
If a DSL modem is active and the connector cable is very short
(< 500 m), an SM100 signature adapter must be plugged on in
oder to attenuate the DSL signals (handshake signals). The
SM100 adapter attenuates the acoustic handshake signals, thus
making measurement possible.
This adapter, however, must be removed from the instrument for
all other tests and measurements except for the capacitance
measurement with connected DSL modem/router described
above, see chapter 6.4.
50
GMC-I Messtechnik GmbH
Measurements RSL – MISO@10 V/100 V – CAP
UISO
Switch positions (a-b) (a-E) (b-E)
a-b
300%
ISO 100 V
V
ISO
30%
AC
TRMS
0%
@10V/100V
10 V / 100 V / SiGn
MAN / AUTO
DATA/MIN/MAX
Insulation resistance low
ble
a
l
i
va
a
e
tu r
a
n
Si g
undefined
000.0
UISO
Signature not available
M
Insulation resistance too low
DC
sign
V
ed
Ripple voltage or parallel capacitance present
–50%
DC
fin
de
n
u
Influences too high
V
–300%
AC
TRMS
20%
60%
200%
300%
Decision value (hi)
FUNC
ENTER
300%
lo
V
hold
Press and hold until the
measured value has stabilzed. If the value continues to fluctuate, plug on
signature adapter SM100 .
ZERO
ESC
%
100
%
hi
Decision value (applicable range: –50 ... +30%)
release
+60%
... 200%
V
GMC-I Messtechnik GmbH
%
%
010
V
V
Signature
Decision value
available approx. +60% ... +200%
not available*
< +20%
* Percentage values blinking
51
Device and Measuring Parameters
7
Device and Measuring Parameters
The instrument’s “SETUP ” mode (menu mode) makes it possible to
set operating and measuring parameters, query information and
activate the interface.
➭ The menu mode is accessed by pressing the
MEASURE | SETUP key, assuming that the instrument is switched
on and set to “Measure” (measuring mode operation).
“1nFo” appears at the display.
➭ The main menus, i.e. the “SET” and “tEMP ” menus, as well as
the “SEnd ” and “StorE” menus, are accessed, and the display is
returned to “InFo ”, by repeatedly activating the   keys
(in any direction).
➭ After selecting the desired main menu, sub-menus are
accessed by pressing the FUNC | ENTER key.
➭ The desired parameter is selected by repeatedly pressing the
 keys.
➭ In order to check or change a parameter, acknowledge it with
the FUNC | ENTER key.
After repeatedly pressing the MEASURE | SETUP key (without first
turning the multimeter off), you can return to the last selected
menu or parameter from the measuring mode.
Example: Setting Time
MEASURE
SETUP
FUNC
ENTER
1nFo  ...  set
FUNC
ENTER
10:24 (hh:mm)  
rAte  ...  t iME
FUNC
ENTER
Setting hours and minutes:
Advance to desired entry position.
Change the setting, the entry position blinks.
Press and hold the key to change the setting rapidly.
FUNC
The new time setting is activated after
ENTER
acknowledgement.


➭ The   keys can be used to position the cursor at the entry
position.
The desired value is selected with the help of the  keys.
➭ Changes can only be accepted with the FUNC | ENTER key.
➭ You can return to the sub-menu without making any changes
by pressing the ZERO | ESC key, and to the main menu by
pressing the ZERO | ESC key once again etc.
➭ You can switch to the measuring mode from any menu level by
pressing the FUNC | ENTER key.
52
GMC-I Messtechnik GmbH
Device and Measuring Parameters
7.1
Paths to the Various Parameters
020.00
V
DC
AC
TRMS
MEASURE
SETUP
7.2
01nfo
A.d iSP
APoFF
bAtt
bEEP
Cap
Main Menus 
1nFo
FUNC
ENTER
StorE
FUNC
ENTER
Sub-Menus / Parameters 
Query
Set
bAtt:
uers ion:
dAtE:
tiME:
0CCvP:
SEnd
FUNC
ENTER
Set
FUNC
ENTER
Set
000. 0
CLEAr
StArt
StoP
StArt
StoP
Selection
Selection
FUNC
ENTER
FUNC
ENTER
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SET
List of All Parameters
Parameter Page: Header
0.d iSP 54: 0.diSP – show/hide leading zeros
59: Configuring Interface Parameters
Addr
tEMP
FUNC
ENTER
Set
rAtE
C
0. . diSP
F
A. diSP
CL iP
APoFF
Selection
v_1so
FUNC
Cap
ENTER
r_sl
bEEP
irStb
Addr
Selection
dAtE
FUNC
t iME ENTER
CLEAr
CL IP
dAtE
EMpty
1nfo
irStb
0CCvP
rAtE
r_sL
SEnd
SET
StArt
StoP
store
tEMP
t iME
v1so
uErS ion
55: A.diSP – analog display: select display mode
55: APoFF – specified time for automatic shutdown and continuous ON
54: bAtt – query battery voltage
55: bEEP – set limit value for continuity testing
56: CAP – scaling factor for cable length measurement (capacitive linear electric
constant)
23: Measurement Data Recording
39: Direct and Pulsating Current Measurement with Clip-On Current Sensor,
A DC and A (DC+AC)
40: Alternating Current Measurement with Clip-On Current Sensor, A AC and Hz
54: dAtE – query date, 56: dAtE – enter date
23: Measurement Data Recording
54: Querying Parameters – InFo Menu (as moving letters)
59: Configuring Interface Parameters
23: Measurement Data Recording
54: rAtE – set the sampling rate
56: r _SL – set limit value for protective conductor resistance
58: Activating the Interface
54: Entering Parameters – SETUP Menu
23: Measurement Data Recording
31: Temperature Measurement – Temp RTD
54: tiME – query time, 56: tiME – set time
55: U_ISo – select test voltage
54: vErSion – query firmware version
53
Device and Measuring Parameters
7.3
Querying Parameters – InFo Menu (as moving letters)
bAtt – query battery voltage
MEASURE
SETUP
1nFo
FUNC
ENTER
bAtt: 2.75 V.
vErSion – query firmware version
MEASURE
SETUP
1nFo
FUNC
ENTER
bAtt:  uErS ion: 1.00
FUNC
ENTER
bAtt:  ...  dAtE: 31.12.05 (DD.MM.YY)
dAtE – query date
MEASURE
SETUP
1nFo
D = day, M = month, Y = year
Date and time must be reentered after replacing the batteries.
tiME – query time
7.4
Entering Parameters – SETUP Menu
rAtE – set the sampling rate
The sampling rate specifies the time interval after which the
respective measured value is transmitted to the interface, or to
measured value memory.
Any one of the following sampling rates can be selected:
[mm:ss.t]: 00:00,1, 00:00,2, 00:00.5, 00:01,0, 00:02,0, 00:05.0
[h:mm:ss.t] (h=hours, m=minutes, s=seconds, z=tenths of a sec.):
0:00:10, 0:00:20, 0:00:30, 0:00:40, 0:00:50, 0:01:00, 0:02:00,
0:05:00, 0:10:00, 0:20:00, 0:30:00, 0:40:00, 0:50:00, 1:00:00,
2:00:00, 3:00:00, 4:00:00, 5:00:00, 6:00:00, 7:00:00, 8:00:00,
9:00:00
Setting the Sampling Rate
FUNC
ENTER
rAtE
00:00.1 ... 00:00.5 ... 9:00:00 
FUNC
ENTER
MEASURE
SETUP
1nFo  ...  SET
FUNC
ENTER
(00:00.5 = 0.5 s = default value)
MEASURE
SETUP
1nFo
(hh:mm:ss)
FUNC
ENTER
bAtt:  ...  t iME: 13:46:56
h = hours, m = minutes, s = seconds
Date and time must be reentered after replacing the batteries.
OCCUP – query memory occupancy
MEASURE
SETUP
1nFo
FUNC
ENTER
bAtt:  ...  0CCvP: 000.0%
0.diSP – show/hide leading zeros
This parameter determines whether or not leading zeros will
appear in the measured value display.
MEASURE
SETUP
FUNC
ENTER
rAtE  ...  0.diSP
FUNC
ENTER
0000.0 : with leading zeros (default value)
0.0
: leading zeros suppressed

54
1nFo  ...  SET
FUNC
ENTER
GMC-I Messtechnik GmbH
Device and Measuring Parameters
A.diSP – analog display: select display mode
One of two different display modes can be selected for the analog
display:
• bArG: bar graph
• Po int: pointer
MEASURE
SETUP
FUNC
ENTER
1nFo  ...  SET
bArG / Po int 
FUNC
ENTER
rAtE  ...  A.d iSP
FUNC
ENTER
FUNC
ENTER
10 ... 59 min on 
1nFo  ...  SET
FUNC
ENTER
FUNC
ENTER
... 10, 100 V 
FUNC
ENTER
MEASURE
SETUP
APoFF – specified time for automatic shutdown and continuous ON
The instrument is switched off automatically if the measured value
remains unchanged for a long period of time and if none of the
keys or the rotary switch have been activated before the specified
time “APoFF” (entered in minutes) has elapsed.
If the on setting is selected, the multimeter is set for long-term
measurement and ON appears in the display to the right of the
battery symbol. In this case, the multimeter can only be switched
off manually. The “on” setting can only be cancelled by changing
the respective parameter, and not by switching the instrument off.
1nFo  ...  SET
MEASURE
SETUP
FUNC
ENTER
FUNC
ENTER
rAtE  ...  v1so
bEEP – set limit value for continuity testing
(po int = default setting)
MEASURE
SETUP
U_ISo – select test voltage
The desired test voltage for insulation resistance measurement
can be selected here:
rAtE  ...  APoFF
FUNC
ENTER
1nFo  ...  SET
FUNC
ENTER
1, 10, 20, 30, 40, 90  
rAtE  ...  bEEP
FUNC
ENTER
(10  = default setting)
irStb – status of the infrared receiver in the stand-by mode
See chapter 8.2 on page 59 regarding settings.
Addr – set device address
See chapter 8.2 on page 59.
(10 minutes = default setting)
GMC-I Messtechnik GmbH
55
Device and Measuring Parameters
dAtE – enter date
Entering the current date makes it possible to acquire measured
values in real-time.
MEASURE
SETUP
FUNC
ENTER
1nFo  ...  SET
FUNC
ENTER
See chapter 5.7.3 and chapter 5.7.4.
rAtE  ...  dAtE
31.12 (DD: day . MM: month)  
2005 (YYYY: year)  
CLIP – set current clip factor
FUNC
ENTER
FUNC
ENTER
r _SL – set limit value for protective conductor resistance
MEASURE
SETUP
Date and time must be reentered after replacing the batteries.
FUNC
ENTER
1nFo  ...  SET
FUNC
ENTER
rAtE  ...  r _sl
> 100, 200 , 2 ... 3 k, 0L 
FUNC
ENTER
(2 = default setting)
tiME – set time
Entering the correct time makes it possible to acquire measured
values in real-time.
MEASURE
SETUP
FUNC
ENTER
1nFo  ...  SET
FUNC
ENTER
10:24 (hh:mm)  
CAP – scaling factor for cable length measurement (capacitive linear
electric constant)
rAtE  ...  t iME
FUNC
ENTER
MEASURE
SETUP
FUNC
ENTER
1nFo  ...  SET
FUNC
ENTER
rAtE  ...  CAP
010 nF . . . 100 nF . . . 500 nF 
FUNC
ENTER
Date and time must be reentered after replacing the batteries.
(100 nF = default setting)_
56
GMC-I Messtechnik GmbH
Device and Measuring Parameters
7.5 Default Settings
Previously entered changes can be undone, and the default
settings can be reactivated. This may be advisable under the
following circumstances:
• after the occurrence of software or hardware errors,
• if you are under the impression that the multimeter does not
work correctly.
➭ Disconnect the device from the measuring circuit.
➭ Remove the batteries temporarily (see also chapter 10.2).
➭ Simultaneously press and hold the
ZERO
ESC
and
ON / OFF
LIGHT
keys, and connect the battery at the same time.
GMC-I Messtechnik GmbH
57
Interface Operation
8
Interface Operation
The cable multimeter is equipped with an infrared interface for the
transmission of measurement data to a PC. Measured data are
optically transferred through the instrument housing by means of
infrared light to an interface adapter (accessory), which is attached
to the multimeter. The adapter’s USB interface allows for the
establishment of a connection to the PC via an interface cable.
Beyond this, commands and parameters can be transmitted from
the PC to the multimeter as well. The following functions can be
executed:
• Configuration and read-out of measuring parameters,
• Measuring function and measuring range selection,
• Start measurement,
• Read out stored measured values.
Starting Continuous Transmission Operation with Menu Functions
MEASURE
SETUP
58
FUNC
ENTER
StArt
FUNC
ENTER
send
The
symbol blinks at the display in order to indicate interface
operation.
Stopping Continuous Transmission Operation with Menu Functions
MEASURE
SETUP
FUNC
ENTER
The
8.1 Activating the Interface
The interface is automatically activated for receiving operation
(multimeter receives data from the PC) as soon as the interface is
addressed by the PC, assuming that the “irStb” parameter has
been set to “iron” (see chapter 8.2), or the instrument is already
switched on (the first command wakes up the multimeter, but
does not yet execute any further commands).
The “continuous transmission” operating mode is selected
manually as described below. In this operating mode, the
instrument continuously transmits measurement data to the PC
via the interface adapter, which can then be displayed with the
help of a terminal program.
1nFo  ...  SEnd
1nFo  ...  SEnd
FUNC
ENTER
FUNC
ENTER
send
stop
send
symbol is cleared from the display.
Automatic Activation and Deactivation of Transmission Mode Operation
If the sampling rate is 10 seconds or longer, the display is
switched off automatically between samples in order to prolong
battery service life. The only exception is when the multimeter is
set to continuous operation.
As soon as an event occurs, the display is automatically switched
back on.
GMC-I Messtechnik GmbH
Interface Operation
8.2
Configuring Interface Parameters
irStb – status of the infrared receiver in the stand-by mode
There are two possible switching statuses for the infrared
interface when the multimeter is switched off:
ir on:
IR appears at the display and the infrared interface is
active, i.e. signals such as making commands can be
received, and power is consumed even though the
multimeter is switched off.
iroFF:
IR does not appear at the display and the infrared
interface is switched off, signals cannot be received.
MEASURE
SETUP
1nFo  ...  SET
FUNC
ENTER
FUNC
ENTER
ir on / iroFF 
FUNC
ENTER
rAtE  ...  irStb
Addr – Address
If several multimeters are connected to the PC via an interface
adapter, a separate address can be assigned to each instrument.
Address number 1 should be selected for the first instrument, 2
should be assigned to the second and so forth.
MEASURE
SETUP
FUNC
ENTER
1nFo  ...  SET
00 ... 01 ... 15 
FUNC
ENTER
rAtE  ...  Addr
FUNC
ENTER
(15 = default setting)
(irstb = iroFF = default setting)
GMC-I Messtechnik GmbH
59
Technical Data
9
Technical Data
Meas.
Resolution at
Function Measuring Range Upper Range
Limit
(input)
V
(a)
300.0 mV
3.000
V
30.00
V
300.0
V
600
V
100
1
10
100
1
V
mV
mV
mV
V
Intrinsic Uncertainty
under Reference Conditions
Input impedance
 (... % rdg. + ... d)
 (... % rdg. + ... d)
0.5 + 3 10)
0.5 + 1
0.5 + 1
0.5 + 1
0.5 + 1
1.5 + 3 (> 300 d)
1.5 + 3 (> 300 d)
1.5 + 3 (> 30 d)
1.5 + 3 (> 100 d)
~/
9
9
9
9
9
M
M
M
M
M
~ 1), 11)
9 M // < 50 pF
9 M // < 50 pF
9 M // < 50 pF
9 M // < 50 pF
9 M // < 50 pF
Voltage drop at approx. range limit
A
(E)
A
(a)
300.0 A
3.000 mA
30.00 mA
300.0 mA
1.000
A
Factor: 1:1/10/100/1000
0.3/3/30/300 A
3/30/300/3k A
30/300/3k/30k A
100
1
10
100
1
nA
A
A
A
mA
18
160
32
320
600
Input
300 mV
3 V
30 V
mV
mV
mV
mV
mV

(a)
RSL
60
mV
mV
mV
mV
mV
Input impedance
Voltage measurement input approx. 9 M
( V socket)
Open-circuit
voltage

k
k
k
M
M
100 m
1 
10 
100 
1 k
10 k
< 1.4
< 1.4
< 1.4
< 1.4
< 1.4
< 1.4
V
V
V
V
V
V
300.0 
3.000 k
300.0 
100 m
1 
100 m
Approx. 13
Approx. 13
Approx. 3
V
V
V
5.1 V 3)
1 mV
Approx. 13
V
300.0
3.000
30.00
300.0
3.000
30.00
18
160
32
320
600
Meas. current at
range limit
Approx. 250 A
Approx. 160 A
Approx. 28 A
Approx. 2.9 A
Approx. 0.31 A
Approx. 33 nA
Approx. 2 mA const.
Approx. 1 mA const.
0.5 + 3
1), 11)
1.5 + 5 (> 100 d)
1.5 + 5 (> 100 d)
1.5 + 5 (> 30 d)
1.5 + 5 (> 100 d)
~ 1), 11)
0.5 + 3
Value
600 V
DC
AC
RMS
Sine
Time
Cont.
1), 11)
0.5 + 5
10)
Overload
Capacity 2)
6
~ 1), 11)
0.5 + 5
 (... % rdg. + ... d)
0.3 A
Cont.
1.6 A
5 min.
1), 11)
1.5 + 3 (> 300 d)
1.5 + 3 (> 300 d)
1.5 + 3 (> 30 d)
1.5 + 3 (> 100 d)
Plus clip-on current sensor error
Measurement input
600 V
Max. 10 s
TRMS
 (... % rdg. + ... d)
0.5 + 3 10)
0.5 + 1
0.5 + 1
0.5 + 1
0.5 + 1
2.0 + 5
3+5
3+5
3+5
600 V
DC
AC
RMS
Sine
Max. 10 s
2+5
GMC-I Messtechnik GmbH
Technical Data
Discharge resist.
F
(a)
30.00
300.0
3.000
30.00
300.0
nF
nF
F
F
F
10
100
1
10
100
pF
pF
nF
nF
nF
300.0 Hz
3.000 kHz
30.00 kHz
300.0 kHz
0.1
1
10
100
Hz
Hz
Hz
Hz
10
1
100
12
3
M
M
k
k
k
 (... % rdg. + ... d)
1 + 6 4), 10)
1 + 6 4)
1 + 6 4)
1 + 6 4)
5 + 6 4)
 (... % rdg. + ... d)
U0 max
0.7
0.7
0.7
0.7
0.7
V
V
V
V
V
fmin 5)
Hz (V)/
Hz (A)
Hz (V)
1
Hz
10
100
Hz
Hz
C
1)
Hz (A): 7)
GMC-I Messtechnik GmbH
9)
2K+5
1+5
0.1 C
15 ... 45 ... 65 Hz ... 10 (5) kHz sine. See following page for influences.
At 0 ... + 40 C
3) Display of up to max. 5.1 V, “OL” in excess of 5.1 V.
4)
Applies to measurements at film capacitors and with battery operation
5) Lowest measurable freq. for sinusoidal meas. signals symmetrical to zero point
6) Overload capacity of the voltage measurement input: power limiting:
frequency x max. voltage 6 x 106 V x Hz: e.g. max. 600 V 1 kHz
7) Overload capacity of the current measurement input:
See current measuring ranges for maximum current values.
8)
Input sensitivity, sinusoidal signal, 10% to 100% of the voltage or current measuring
range; limitation: up to 30% of the range at up to 100 kHz in the mV measuring range,
50% of the range at up to 300 kHz, 30% of the range in the 1 A measuring range.
The voltage measuring ranges with max. 30 kHz apply in the A measuring range.
9) Plus sensor deviation
10)With ZERO function active
2)
Max. 10 s
Hz (V) 6):
Hz(A )6):
600 V Max. 10 s
0.5 + 1 8)
 (... % rdg. + ... d)
– 200.0 ...
+200.0 C
Pt100
+200.0 ...
+850.0 C
– 150.0 ...
+200.0 C
Pt1000
+200.0 ...
+850.0 C
600 V
DC
AC
RMS
Sine
2K+5
600 V
DC/AC
Max. 10 s
RMS
Sine
1+5
11)
Residual value of 1 to 10 d with short circuited terminal tips,
exception: mV / A range of 1 to 35 d at zero point due to the TRMS converter
Key: R = meas. range, d = digit(s), rdg. = measured value (reading)
61
Technical Data
Insulation Resistance Measurement in Selector Switch Positions (a-b) (a-E) (b-E) 1)
Measuring Range
6 V ... 110 V 2)
5 ... 310.0 k
0.280 ... 3.100 M
02.80 ... 31.00 M
028.0 ... 310.0 M
Nominal Voltage
UISO (UINS)
Resolution
Ri approx. 120 k
10//100 V
10//100 V
10//100 V
10//100 V
During insulation resistance measurement (M@UISO): If ERROR is displayed as „Error“
1)
0.1
1
10
100
0.1 V
k
k
k
k
Intrinsic Error
under Reference
Conditions
( % rdg + d)
3 + 30
3 +5
3 +5
5 +5
5 +5
>> limits: Uinterference > 10 ... 20 V and Uinterference  UISO, Ri < 10 k@ Uiso 10 V,
Ri < 100 k @ Uiso 100 V
2)
Interference voltage measurement TRMS (V AC + DC) with 120 k input resistance, bandwidth 15 Hz ... 500 Hz, measuring error 3% + 30 Digit
Measuring
Function
Switch
Setting
Uinterference/
M ISO
Nom.
Voltage
UN
@100k
OpenCircuit
Voltage
Uo
Nom.
Current IN
@100k
ShortCircuit
Current Ik
—
—
Signature if interference value is stable in range
available
–50% ... +30%
not available
—
plus decision value
approx. +60% ... +200%
< +20%
Prerequisites:
Parallel resistance > 200 k, parallel capacitance < 1 μF,
Ripple voltage < 4 Vss 50 Hz
and exclusively high-resistance DC voltage
Influencing Quantities and Influence Error
Influencing
Quantity
Acoustic Overload Capacity
Signal
Value
Time
for
U > 110
110 V
V
100 V
Max.
> 1.0 < 1.2 U > 110 100 V
120 V
mA
mA
V
M ISO
8.7 V
11 V
0.09 < 0.260 U > 110V 100 V
Ripple voltage < 4 Vss 50 Hz, parallel capacitance < 3 μF
—
Galvanic Signature Ascertainment in Selector Switch Positions (a-b)
Sphere of
Influence
Measured Quantity /
Measuring Range 1)
V
0.2 + 5
V
0.4 + 5
300  ... 3 M
Temperature
Cont.
0 C ... +21 C
and
+25 C... +40 C
10 s
10 s
1)
Influence Error
(...% rdg. + ... d) / 10 K
30 M
0.5 + 5
1+5
mA/A
0.5 + 5
mA/A
0.8 + 5
30 nF ... 300 F
1+5
Hz
0.2 + 5
C/F (Pt100/Pt1000)
0.5 + 5
With zero balancing
Interference-immune Capacitance Measurement in Selector Switch
Positions (a-b) (a-E) (b-E)
Measuring
Range
300 nF
3 μF
10 μF
Resolution Intrinsic Uncertainty under
Measuring
Overload
3100/1100
Reference Conditions
Cycle (max.) Capacity
Digit
 ( ... % rdg. + ... d)
100 pF
2 + 10
2s
600 V / PTC
1 nF
2 + 10
2s
max. 10 s
10 nF
5 + 10
2s
Measuring voltage U0 = 2 Vss approx. 1 Hz, parallel resistance > 5 M
Ripple voltage < 4 Vss 50 Hz
62
GMC-I Messtechnik GmbH
Technical Data
Influencing
Quantity
Measured
Quantity /
Measuring
Range
VAC
2)
Frequency
AAC
AAC
+DC
AAC
2)
3)
300 mV
...
300 V
> 15 Hz ... 45
600 V
300 A
...
1A
300 A
...
1A
> 65 Hz ...
Hz
3 + 5 > 300 digits
> 65 Hz ... 10 kHz
5 kHz
> 15 Hz ... 45
3 + 10 > 300 digits
> 65 Hz ... 10 kHz
> 15 Hz ... 45
3 + 5 > 300 digits
Power limiting: frequency x voltage, max. 6 x 10 V x Hz
The accuracy specification is valid as of a display value of 10% and up
to 100% of the measuring range for both measuring modes with the
TRMS converter in the A AC and A (AC+DC) ranges.
Crest Factor CF
Measured Quantity /
Measuring Range
1 ... 3
V
> 3 ... 5
,A
Influence Error 5)
 1% rdg.
 3% rdg.
Except for sinusoidal waveshape
Influencing
Quantity
Sphere of
Influence
Measured Quantity
Influence Error
75%,
3 days,
instrument off
V A, , F, Hz, C
1 x intrinsic error
Battery voltage
1.8 to 3.6 V
ditto
Included in intrinsic error
Mains operation
5V
ditto
 10 Digit
Relative
Humidity
GMC-I Messtechnik GmbH
Measured Qty. /
Measuring Range
Series Mode
Interference
Voltage
V
3V
Interference quantity max. 600 V
50 Hz ... 60 Hz, sine
, 30 V
Damping
> 120 dB
> 80 dB
300 V
> 70 dB
600 V
> 60 dB
Interference quantity: V ,
respective nominal value of the
measuring range,
max. 600 V , 50 Hz ... 60 Hz sine
V
> 50 dB
Interference quantity max. 600 V
V
> 110 dB
3 + 30 > 300 digits
> 65 Hz ... 10 kHz
Sphere of
Influence
Sphere of Influence
Interference quantity max. 600 V
Common Mode
Interference
Voltage
Hz
> 65 Hz ... 10 kHz
300 mV /
3 V / 30 V
Influencing
Quantity
3 + 5 > 60 digits
Hz
6
Influencing
Quantity
5)
Intrinsic Error 3)
 ... % rdg. + ... d)
Sphere of Influence
Response Time (after manual range selection)
Measured Quantity /
Measuring Range
V
A
,V
,A
Response Time
Digital Display
Measured Quantity
Jump Function
1.5 s
From 0 to 80%
of upper range limit value
300  ... 3 M
2s
30 M
5s
Continuity
< 50 ms
C (Pt 100)
Max. 3 s
30 nF ... 300 F
Max. 5 s
>10 Hz
1.5 s
From  to 50%
of upper range limit value
1.5 s
From 0 to 50%
of upper range limit value
Reference Conditions
Ambient temperature
Relative humidity
Meas. Qty. Freq.
Meas. Qty. Waveshape
Battery voltage
+23C 2 K
40% to 75%
45 Hz  65 Hz
Sine
3 V 0.1 V
63
Technical Data
Ambient Conditions
Accuracy range
0 C ... +40 C
Operating temp. range10 C ... +50 C
Storage temp. range 25 C ... +70 C (without batteries)
Relative humidity
40 to 75%, no condensation allowed
Elevation
to 2000 m
Indoors, except within specified ambient
Deployment
conditions
Display
LCD panel (65 mm x 36 mm) with analog and digital display including unit of measure, type of current and various special functions
Background illumination
Background illumination is switched off approximately 1 minute
after it has been activated.
Analog
Display
Scaling
Polarity display
Overflow display
Measuring rate
64
LCD scale with bar graph or pointer,
depending upon the selected parameter
setting
Linear (ranges other than MISO):
5 ... 0 ... 30 with 35 scale divisions
for , 0 ... 30 with 30 scale divisions in all
other ranges
Logarithmic MISO range):
 0.3 3 30 300
bar graph instead of pointer
With automatic switching
With the symbol
40 measurements per second and display
refresh
Digital
Display / Char. Height7-segment characters / 15 mm
Number of places
3¾ places, 3100 steps
Overflow display
“OL” is displayed for 3100 digits
Polarity display
“–” (minus sign) is displayed
if plus pole is connected to “”
Measuring rate
10 and 40 measurements per second with
the Min/Max function except for the
capacitance, frequency and duty cycle
measuring functions
Refresh Rate
2 times per sec., every 500 ms
Electrical Safety
Safety class
II per DIN EN 61010-1:2011/
VDE 0411-1:2011
Measuring category II
III
Nominal voltage
600 V
300 V
Fouling factor
2
Test voltage
3.5 kV~ per DIN EN 61010-1:2011/
VDE 0411-1:2011
Fuses
Fuse link
FF 1.6 A/700 V AC/DC;
6.3 mm x 32 mm; switching capacity:
50 kA at 700 V AC/DC;
protects the current measurement input in
the 300 A through 1 A ranges
GMC-I Messtechnik GmbH
Technical Data
Power Supply
Electromagnetic Compatibility (EMC)
Battery
Interference emission EN 61326-1:2013 class B
Interference immunity EN 61326-1:2013
EN 61326-2-1:2013
2 ea. 1.5 V mignon cell (2 ea. size AA),
alkaline manganese per IEC LR6
Service life
With alkaline manganese batteries: approx.
200 hours without MISO measurement
Battery test
Battery capacity display with battery
symbol in 4 segments:
.
Querying of momentary battery voltage via
menu function.
Power OFF function The multimeter is switched off automatically:
– If battery voltage drops to below approx.
1.8 V
– If none of the keys or the rotary switch are
activated for an adjustable duration of 10
to 59 minutes, and the multimeter is not in
the continuous operation mode
Power pack socket
If the power pack has been plugged into
the instrument, the installed batteries are
disconnected automatically.
Rechargeable batteries can only be
recharged externally.
Measuring
Function
Nominal
Voltage UN
Resistance
Service life
of the
in Hours
DUT
V
V
M
1)
10 V/100 V
10 V/100 V
1 M
100 k
Number of Possible
Measurements with
Nominal Current per
VDE 0413
Data Interface
Type
Data transmission
Protocol
Baud Rate
Functions
Optical via infrared light through the housing
Serial, bidirectional (not IrDa compatible)
Device specific
38,400 baud
– Select/query measuring functions
and parameters
– Query momentary measurement data
The USB X-TRA plug-in interface adapter (see accessories) is
used for adaptation to the PC’s USB port.
Internal Measured Value Storage
Memory capacity
4 MBit / 540 kB for approx. 15,400
measured values with indication of date
and time
200 1)
150 1)
50
3000
Times 0.7 for interface operation
GMC-I Messtechnik GmbH
65
Technical Data
Mechanical Design
Housing
Dimensions
Weight
Protection
Impact resistant plastic (ABS)
200 x 87 x 45 mm
(without protective rubber cover)
Approx. 0.35 kg with batteries
Housing: IP 54
(pressure equalization by means of the
housing)
Table Excerpt Regarding Significance of the IP Code
IP XY
(1st digit X)
0
1
Protection against
foreign object entry
Not protected
 50.0 mm dia.
IP XY
(2nd digit Y)
0
1
2
 12.5 mm dia.
2
3
4
5
 2.5 mm dia.
 1.0 mm dia.
Dust protected
3
4
5
66
Protection against the
penetration of water
Not protected
Vertically falling drops
vertically falling drops with
enclosure tilted 15
Spraying water
Splashing water
Water jets
GMC-I Messtechnik GmbH
Technical Data
GMC-I Messtechnik GmbH
67
Maintenance – Calibration
10
Maintenance and Calibration
!
Attention!
Disconnect the instrument from the measuring circuit before
opening the battery compartment lid or fuse cover when
replacing batteries or fuses!
10.1 Displays – Error Messages
Message
Function
Meaning
FUSE
Current measurement
Blown fuse
In all operating modes
Battery voltage has fallen below 1.8 V
0L
ur
Measurement
Indicates overflow
MISO measurement
Measured value of less than 10% of the measuring range
error
MISO measurement
Interference voltage detected
10.2 Batteries
Note
Removing the Batteries During Periods of Non-Use
The integrated quartz movement draws power from the
batteries even when the instrument is switched off. It is
advisable to remove the batteries during long periods of
non-use for this reason (e.g. vacation). This prevents
excessive depletion of the battery, which may result in
damage under unfavorable conditions.
backup your data to a PC with the help of METRAwin 10 software before replacing the batteries.
The selected operating parameters remain in memory,
although date and time must be reentered.
Battery
The current battery charge level can be queried in the “1nfo”
menu:
MEASURE
SETUP
1nFo
FUNC
ENTER
bAtt: 2.75 V.
Make sure that no battery leakage has occurred before initial
start-up, as well as after long periods of storage. Continue to
inspect the batteries for leakage at short, regular intervals.
If battery leakage has occurred, carefully and completely clean the
electrolyte from the instrument with a damp cloth, and replace the
battery before using the instrument.
If the “
” symbol appears at the display, the batteries should
be replaced as soon as possible. You can continue working with
the instrument, but reduced measuring accuracy may result.
The instrument requires two 1.5 V batteries in accordance with
IEC LR 6, or two equivalent rechargeable NiCd batteries.
Note
Battery Replacement
Stored measurement data are lost when the batteries are
replaced. In order to prevent data loss, it is advisable to
68
GMC-I Messtechnik GmbH
Maintenance – Calibration
Replacing the Batteries
!
Attention!
Disconnect the instrument from the measuring circuit before
opening the battery compartment lid in order to replace the
batteries.
If the fuse is blown or has not been inserted, “FuSE” appears at
the digital display. The fuse interrupts the current measuring
ranges. All other measuring ranges remain functional.
fuse
➭ Set the instrument face down onto the working surface.
➭ Turn the slotted screw on the lid with the battery symbols
counterclockwise.
➭ Lift off the lid and remove the batteries from the battery
compartment.
➭ Insert two new 1.5 V mignon batteries into the battery
compartment, making sure that the plus and minus poles
match up with the provided polarity symbols.
➭ When replacing the battery compartment lid, insert the side
with the guide hooks first.
Tighten the screw by turning it clockwise.
➭ Please dispose of depleted batteries in accordance with
environmental protection regulations!
10.3 Fuses
Testing the Fuse
The fuse is tested automatically:
• When the instrument is switched on with the rotary switch in
the A position
• When the instrument is already on and the rotary switch is turned to
the A position
• In the active current measuring range when voltage is applied
GMC-I Messtechnik GmbH
DC
Blown Fuse
A
Replacing the Fuse
If a fuse should blow, eliminate the cause of overload before
placing the instrument back into service!
!
Attention!
Disconnect the instrument from the measuring circuit before
opening the fuse cover in order to replace the fuse!
➭ Set the instrument face down onto the working surface.
➭ Turn the slotted screw on the cover with the fuse symbol
counterclockwise.
➭ Lift off the cover and pry the fuse out using the flat side of the
fuse cover.
➭ Insert a new fuse. Make sure that the fuse is centered, i.e.
between the tabs at the sides.
➭ When replacing the fuse cover, insert the side with the guide
hooks first. Tighten the screw by turning it clockwise.
➭ Dispose of the blown fuse with the trash.
69
Maintenance – Calibration
!
Attention!
Use specified fuses only!
If fuses with other blowing characteristics, other current
ratings or other breaking capacities are used, the operator
is placed in danger, and protective diodes, resistors and
other components may be damaged.
The use of repaired fuses or short-circuiting the fuse holder
is prohibited.
Note
Testing the Fuse with the Instrument Switched On
After inserting the fuse with the instrument switched on, the
instrument must be switched off briefly and then switched
back on, or briefly switched to a non current measuring
range and then back to the A measuring range.
If contact is poor or the fuse is blown, FUSE appears at the
display.
70
10.4 Housing Maintenance
No special maintenance is required for the housing. Keep outside
surfaces clean. Use a slightly dampened cloth for cleaning. Avoid
the use of cleansers, abrasives or solvents.
10.5 Return and Environmentally Sound Disposal
The instrument is a category 9 product (monitoring and control
instrument) in accordance with ElektroG (German electrical and
electronic device law). This device is subject to the RoHS
directive. Furthermore, we make reference to the fact that the current status in this regard can be accessed on the Internet at
www.gossenmetrawatt.com by entering the search term WEEE.
We identify our electrical and electronic devices in accordance with WEEE 2012/19/EU and ElektroG with
the symbol shown at the right per DIN EN 50419.
These devices may not be disposed of with the trash.
Please contact our service department regarding the return of old
devices (see chapter Standard Equipment – Contact Persons).
If you use batteries or rechargeable batteries in your instrument or
accessories which no longer function properly, they must be duly
disposed of in compliance with the applicable national regulations.
Batteries or rechargeable batteries may contain harmful substances or heavy metal such as lead (PB), cadmium (CD) or mercury (Hg).
They symbol shown to the right indicates that batteries or
rechargeable batteries may not be disposed of with the
trash, but must be delivered to collection points specially
Pb Cd Hg
provided for this purpose.
GMC-I Messtechnik GmbH
Maintenance – Calibration
10.6 Recalibration
The respective measuring task and the stress to which your measuring instrument is subjected affect the ageing of the components and may result in deviations from the guaranteed accuracy.
If high measuring accuracy is required and the instrument is frequently used in field applications, combined with transport stress
and great temperature fluctuations, we recommend a relatively
short calibration interval of 1 year. If your measuring instrument is
mainly used in the laboratory and indoors without being exposed
to any major climatic or mechanical stress, a calibration interval of
2-3 years is usually sufficient.
10.7 Manufacturer’s Guarantee
All METRAHIT digital multimeters and calibration instruments are
guaranteed for a period of 3 years after shipment. The manufacturer’s guarantee covers materials and workmanship. Damages
resulting from use for any other than the intended purpose or operating errors, as well as any and all consequential damages, are
excluded.
The calibration certificate confirms that the product conformed to
the specified technical data at the time of calibration. We guarantee the observance of the specified technical data within the admissible tolerance limits for a period of 12 months from delivery.
During recalibration* in an accredited calibration laboratory
(DIN EN ISO/IEC 17025) the deviations of your instrument in relation to traceable standards are measured and documented. The
deviations determined in the process are used for correction of
the readings during subsequent application.
We are pleased to perform DAkkS or factory calibrations for you in
our calibration laboratory. Please visit our website at
www.gossenmetrawatt.com ( Company  DAkkS Calibration
Center or  FAQs  Calibration questions and answers).
By having your measuring instrument calibrated regularly, you fulfill the requirements of a quality management system per
DIN EN ISO 9001.
* Verification of specifications or adjustment services are not part of the calibration. For products from our factory, however, any necessary adjustment is frequently performed and the observance of the relevant specification is confirmed.
GMC-I Messtechnik GmbH
71
Accessories
11
Accessories (Standard Equipment See Page 2)
11.1 General
The extensive accessories available for our measuring
instruments are checked for compliance with currently valid safety
regulations at regular intervals, and are expanded as required for
new applications. Currently up-to-date accessories which are
suitable for your measuring instrument are listed at the following
web address along with photo, order number, description and,
depending upon the scope of the respective accessory, data
sheet and operating instructions: www.gossenmetrawatt.de
( Products  Measuring Technology – Portable 
Digital Multimeters  METRAHIT ...  Multimeter Accessories).
11.2 Technical Data for Measurement Cables
(scope of delivery: KS21-T safety cable set)
Electrical Safety
Maximum Rated Voltage
Measuring Category
Maximum Rated Current
with safety cap applied
without safety cap applied
1000 V 1000 V
CAT III CAT II
1A
16 A

—
—

Application KS21-T
!
Attention!
In conformity with standard DIN EN 61010-031, measurements in an environment according to measuring
category III may only be performed with the safety cap
applied to the test probe of the measurement cable.
For establishing contact in 4 mm jacks you have to remove the
safety cap by levering out the snap lock of the safety cap with another sharp object (e.g. the second test probe).
11.3 Power Pack NA X-TRA
Use only power packs from GMC-I Messtechnik GmbH only in
combination with your instrument. This assures operator safety by
means of an extremely well insulated cable, and safe electrical
isolation (nominal secondary ratings: 5 V / 600 mA).
Installed batteries are disconnected electronically if the power
pack is used, and need not be removed from the instrument.
Please observe the maximum values of the electrical safety of the
device.
Ambient Conditions (EN 61010-031)
Temperature
–20 C ... + 50 C
Relative humidity
50 to 80%
Fouling factor
2
72
GMC-I Messtechnik GmbH
Accessories
11.4 Interface Accessories
USB X-TRA Bidirectional Interface Adapter
This adapter makes it possible to connect cable multimeters, as
well as METRAHIT X-TRA multimeters which are equipped with a
serial IR interface, to the USB port at a PC. The adapter allows for
data transmission between the multimeter and the PC.
METRAwin 10 PC Analysis Software
METRAwin 10 PC software is a multilingual, measurement data logging program* for recording, visualizing, evaluating and
documenting measured values from METRAHIT multimeters.
Details on the system requirements are given in the installation
instructions of METRAwin 10/METRAwin 45.
* runs under any IBM compatible Windows operating system
GMC-I Messtechnik GmbH
73
Index
12
Index
Numerics
D
0.diSP ..................................................................... 54
dAtE ...................................................................54, 56
Default Settings ......................................................57
Device Returns .......................................................70
Diode Test ...............................................................34
Discharging .............................................................46
Display Illumination ................................................16
A
A.diSP ..................................................................... 55
Addr ........................................................................ 59
APoFF ..................................................................... 55
Automatic Shutdown
Disable .......................................................... 17
Specify Time ................................................. 17
Auto-Range Function ............................................. 18
E
Error ........................................................................46
Error Messages ......................................................68
B
F
bAtt ......................................................................... 54
Batteries
Charge Level ................................................. 68
Level Indicator .............................................. 13
Periods of Non-Use ...................................... 68
Replacement ................................................. 69
bEEP ....................................................................... 55
Fuse
C
Cable Length Measurement .................................. 35
Cable length measurement ................................... 47
Cable Resistance ................................................... 31
Capacitance Measurement ................................... 35
Clip-On Current Sensor ................................... 39, 40
Continuity Test ....................................................... 33
Current Measurement
Notes ............................................................. 36
74
Replacement .................................................69
I
Interfaces
Accessories ...................................................73
Statuses .........................................................13
Interference Voltage Detection ..............................46
irStb .........................................................................59
M
Maintenance
Housing .........................................................70
Manufacturer’s Guarantee .....................................71
Measured Value Storage
DATA Function ..............................................21
MIN/MAX Values ...........................................22
Measurement Cables .............................................72
Measuring Category
Significance .....................................................8
Measuring Range Selection
Automatic ...................................................... 18
Manual .......................................................... 18
Memory
Clear .............................................................. 24
Ending Recording ......................................... 24
Querying Occupancy .................................... 24
Start Recording ............................................. 23
O
OCCUP .................................................................... 54
Overview
Keys and Connections .................................. 12
Parameters ................................................... 53
P
Polarity Reversal .................................................... 45
Power Pack
Accessories .................................................. 72
Initial Start-Up ............................................... 16
Power Pack Adapter Socket
Position of the Connector Socket ................ 15
Product Support ....................................................... 3
Product Support Hotline .......................................... 3
R
rAtE ......................................................................... 54
Recalibration Service ......................................... 4, 71
Repair and Replacement Parts Service .................. 4
Resistance Measurement ...................................... 30
GMC-I Messtechnik GmbH
Index
S
Safety Precautions ...................................................8
Scaling Factor ........................................................35
Scaling factor .........................................................47
Software Enabling ....................................................3
Standard Equipment ................................................2
Switching the Instrument On
Manual ..........................................................16
Via PC ............................................................16
Symbols
Device ............................................................15
Digital Display ...............................................13
Rotary Switch Positions ................................14
T
Temperature Mesurement
With Resistance Thermometers ...................31
tiME ...................................................................54, 56
U
Under-Range ..........................................................18
ur (under-range) ...............................................46, 68
Use for Intended Purpose ......................................10
V
vErSion ....................................................................54
Voltage Comparator ...............................................29
Voltage Measurement
Notes .............................................................26
W
WEEE Mark .............................................................15
GMC-I Messtechnik GmbH
75
Edited in Germany Subject to change without notice  A pdf version is available on the internet
GMC-I Messtechnik GmbH
Südwestpark 15
90449 Nürnberg • Germany
Phone +49 911 8602-111
Fax
+49 911 8602-777
E-Mail info@gossenmetrawatt.com
www.gossenmetrawatt.com