Gossen Metrawatt METRALINE ZCHECK Operating Instructions
Operating Instructions
METRALINE Z
CHECK
Loop Resistance Measuring Instrument
3-349-697-03
2/4.13
Table of Contents Page
!
Meanings of Symbols on the Instrument
1 Introduction ...................................................................... 2
1.1 Scope of Delivery ...........................................................................2
1.2 Optional accessories ......................................................................2
1.3 Safety Precautions .........................................................................2
1.4 General Device Description .............................................................3
1.5 Applicable Standards .....................................................................3
2 Device Description ........................................................... 3
2.1 Housing ........................................................................................3
2.2 Control Panel .................................................................................3
2.3 Initial Start-Up ...............................................................................4
3 Performing Measurements .............................................. 4
3.1 Switching the Instrument On and Off, Energy-Saving Mode,
Automatic Shutdown ......................................................................4
3.2 Instructions and Principles with Validity for All Measurements ...........4
3.3 Measurement of Fault Loop Impedance and Line Impedance ............5
3.3.1 Measurement in Circuits without RCD – ~ Function .........................5
3.3.2 Displaying Further Measured/Calculated Values ...............................5
3.3.3 Measurement in Electrical Circuits with RCD ...................................5
3.4 Automatic Evaluation of Measured Impedance .................................6
3.5 Further Device Functions ................................................................6
3.6 Device Reset Function ....................................................................6
4 Technical Data ................................................................. 7
4.1 Individual Device Functions ............................................................7
4.2 General Data .................................................................................7
5 Table of Protective Devices Stored to the Instrument ..... 8
6 Maintenance .................................................................... 9
6.1 Device Power Supply .....................................................................9
6.1.1 Inserting and Replacing the Batteries ..............................................9
6.1.2 Recharging the Batteries ................................................................9
6.1.3 Replacing the Fuse ........................................................................9
6.2 Cleaning .......................................................................................9
6.3 Recalibration .................................................................................9
7 Repair and Replacement Parts Service
Calibration Center and Rental Instrument Service ......... 10
8 Product Support ............................................................. 10
1 Introduction
1.1 Scope of Delivery
1 Test instrument with mobile test probe
4 Batteries (AAA)
1Pouch
1 Condensed operating instructions
1
CD ROM with operating instructions in available languages
1 Factory calibration certificate
1.2 Optional accessories
4 ea. rechargeable AAA NIMH batteries (Z507B)
1 battery charger (Z507A)
1.3 Safety Precautions
Read the operating instructions thoroughly and carefully before
using your instrument. Follow all instructions contained therein.
Make sure that the operating instructions are available to all users
of the instrument.
This device is equipped with double
or reinforced insulation.
Danger of injury due to electrical current,
warning regarding dangerous electrical voltage
Warning concerning a source of danger
(attention, observe documentation!)
EC mark of conformity:
This instrument fulfills all requirements of applicable
European directives.
Before using the instrument, it must be assured that it is safe.
Do not use if:
• Visible damage is apparent
• The battery compartment lid is missing
• The device has been stored under unfavorable conditions for
a lengthy period of time
• The device has been handled impermissibly, e.g. has been
dropped from a height of 1 meter or more
• The test instrument does not function as described in these
operating instructions (if this is the case, we recommend
resetting the device as described in section 3.6 on page 7).
CAUTION
• Do not touch electrically conductive parts, test probes etc.
when the device is switched on and voltage might still be conducted by a test probe – DANGER OF INJURY!
• Only use test probes which are included with the instrument
or are available as accessories.
• The device must be switched off and no voltage may be
applied when exchanging accessories.
• It is absolutely essential to adhere to all safety precautions,
regulations and standards when performing measurements.
• No keys may be pressed when connecting the instrument to a
device under test.
• The test instrument may not be subjected to the influence of
aggressive substances, gases, vapors, liquids or dust.
• The test instrument may only be used under the conditions
listed in the technical data in section 4 on page 8.
• If the device is moved from a colder to a warmer room, condensation may occur, in which case a brief period of acclimatization is advisable.
• We recommend removing the batteries during lengthy periods
of storage.
• Testing without tripping of RCCB: During measurement, the
RCCB may be tripped unintentionally. This may be attributable
to a high degree of sensitivity towards short current peaks,
especially with those variants with IΔN = 10 mA and 30 mA,
or the RCCB may be defective or a certain leakage current
may flow through the measured electrical circuit which, in
addition to the current that is produced by the test instrument,
trips the RCCB.
• Two relatively strong magnets are integrated into the test
instrument. Avoid close proximity to magnetically sensitive
objects such as watches, credit cards and the like.
• The illustrations in these operating instructions are drawings
and may therefore deviate from reality.
2 GMC-I Messtechnik GmbH
Exclusion of Liability
!
Fixed Test Probe Attached to the Device
LED
OLED Display
Socket for Flexible Test Probe
Socket for Charger
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Plastic
Control Panel
Housing
Screws for Battery Compartment Lid
Battery Compartment with Fuse
Battery Compartment Lid
Serial Plate
When testing systems with RCCBs, the latter may switch off. This
may occur even though the test does not normally provide for it.
Leakage currents may be present which, in combination with the
test current of the test instrument, exceed the shutdown threshold value of the RCCB. PCs which are operated in proximity to
such RCCB systems may switch off as a consequence. This may
result in inadvertent loss of data. Before conducting the test, precautions should therefore be taken to ensure that all data and
programs are adequately saved and the computer should be
switched off if necessary. The manufacturer of the test instrument
assumes no liability for any direct or indirect damage to equipment, computers, peripheral equipment or data bases when performing the tests.
1.5 Applicable Standards
Measurement EMC Safety
EN 61557-1 EN 55022 class B EN 61010-1
EN 61557-3 EN 61326-1 EN61010-031
1.6 Environment
The shipping package is made of recyclable cardboard. Batteries
must be disposed of in accordance with applicable regulations.
This device may not be disposed of with the trash. Further information regarding the WEEE mark can be accessed on the Internet at www.gossenmetrawatt.com by entering the search term
“WEEE”.
2 Device Description
• Use original accessories only.
• Max. permissible voltage between test probe and ground is
300 V!
• Maximum permissible voltage between the test probes is
300 V!
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.
1.4 General Device Description
The test instrument is enclosed in a compact housing with a patented means of retaining the test probes.
The high-contrast, four-color OLED display assures excellent legibility. When performing measurements under unfavorable light
conditions, measuring point illumination can be switched on –
white LED at the front.
The following measurements can be performed with the Metraline
check
Z
:
• Fault loop impedance with short-circuit current
• Fault loop impedance with short-circuit current without tripping the RCCB for measurements of RCCBs with a nominal
current of 100 mA or 300 mA
• Line impedance with short-circuit current
• Line voltage
• Phase detection
check
The Metraline Z
ance in consideration of type, nominal current and disconnection
time. A table with the parameters of various protective devices is
included in device memory (see section 5 on page 9 in these
operating instructions.
allows for the evaluation of measured imped-
2.1 Housing
Figure 2.1: Top View
For transport purposes, the movable test probe can be attached
to the housing and retained by a magnet such that both metal tips
are simultaneously recessed and protected.
In order to charge batteries which have been inserted into the
instrument, the flexible test probe’s connector plug must be
removed and the slide must be pushed to the left, so that the
socket at the right is made accessible and the charger can be
plugged into it.
GMC-I Messtechnik GmbH 3
Figure 2.2: Detail View of the Back Panel with Battery Compartment Lid
2.2 Control Panel
3
1
2
4
5
5
1 Graphic OLED Display
2 START key:
– Switch on:
Press and hold until the
display lights up.
– Start measurement:
Press and hold until measurement starts.
– Measurement point illumina-
tion:
Press briefly to switch illumination on and off.
– Switch off:
Press twice briefly to switch
the instrument off.
3 ~ / RCD key
Measuring function selection:
with/without RCCB
4The T
5 DISP ▲ and
Figure 2.3: Control Panel and OLED Display
key is used to select
A
the value from the table of
protective devices, which is
used to adjust disconnection
time for evaluating measured
values.
▼ keys for selecting the
DISP
protective device for the evaluation of measured values
pressed and no voltage has been applied to the test probes during this time.
3.2 Instructions and Principles with Validity for All Measurements
• The desired functions and parameters are selected with the
~/RCD, T
by pressing the START key. All selected functions or parameters remain valid until they are changed.
• If a voltage of < 24 V or > 260 V is applied to the test probes,
corresponding information appears at the display and measurement cannot be triggered by pressing the START key.
• If a voltage within a range of 24 V to 190 V is applied to the test
probes, the START key is disabled and “< 190 V” is displayed.
Figure 3.1:Voltage < 24 V
• If the test instrument displays voltage applied to the test
probes after the START key has been pressed, although no
measurement ensues and the blown fuse symbol appears at
the display, the fuse must be replaced.
, DISP ▲ and DISP ▼ keys. Measurement is triggered
A
Figure 3.2: Voltage < 24 V
(brief representation)
(detailed representation)
Data can be represented at the OLED display in two different
ways:
• Brief representation: Measured quantities appear at the display
with large numbers, but no evaluation of the measurement
data is included.
• Detailed representation: Measured quantities appear at the display along with information from the protective devices database, as well as the symbol for “corresponds / does not correspond with the measured impedance”.
Phase and battery level are displayed in both modes.
Refer to the description in section 3.5 on page 7
Figure 2.4: Example of Brief
Representation
Figure 2.5: Example of Detailed
Representation
The information which appears at the display varies depending on
the selected function.
2.3 Initial Start-Up
After inserting the batteries in accordance with section 6.1 on
page 10, the measuring instrument is ready for operation.
3 Performing Measurements
Figure 3.3: Blown Fuse Example
(detailed representation)
• If voltage within a range of 190 V to 260 V is applied to the
test probes, the momentary measured value appears at the
display and measurement can be triggered by pressing the
START key.
Figure 3.4: Voltage Measurement
(brief representation)
Figure 3.5: Voltage Measurement
(detailed representation)
• If battery voltage is too low (only the red field is lit up in the
battery symbol), measurement cannot be started. After pressing the START key, the depleted battery symbol appears for
about 1 second (see figure below). Replace the batteries as
described in section 6.1 on page 10.
3.1 Switching the Instrument On and Off, Energy-Saving Mode, Automatic Shutdown
The instrument is switched on by pressing and holding the START
key. Briefly press the START key twice in order to switch the instru-
ment off, during which no voltage may be applied to the test
probes! The instrument is switched to the standby mode after
several seconds (reduced brightness), if none of the keys has
been pressed and no voltage is applied to the test probes. The
instrument is switched out of the standby mode (i.e. back to full
brightness) by pressing any key or applying voltage to the test
probes. The instrument is shutdown automatically if it has
remained inactive for about 1 minute, i.e. if no keys have been
4 GMC-I Messtechnik GmbH
Figure 3.6: Low Battery Voltage
(detailed representation)
Figure 3.7: Display After Pressing START
(detailed representation)
• If several impedance measurements are performed one after
the other, internal warming of the instrument is displayed by
means of the red indicator – “T” symbol. As temperature
increases, the field is gradually filled in and becomes wider.
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