Gossen MetraWatt SECUTEST ST BASE User manual

Operating Instructions
SECUTEST ST BASE(10) / PRO and SECULIFE STBASE(25)
Test Instruments for Checking the Electrical Safety of Devices 3-447-067-03
2/4.22

2Gossen Metrawatt GmbH
Contents Page Page
1 Safety Instructions ..............................................4
2 Applications ........................................................5
2.1 Intended Use / Use for Intended Purpose ......................5
2.2 Use for Other than Intended Purpose.............................6
2.3 Liability and Guarantee ..................................................6
2.4 Opening the Instrument / Repairs ..................................6
3 Documentation....................................................6
4 Getting Started....................................................7
5 Test Instrument ...................................................7
5.1 Scope of Delivery...........................................................7
5.2 Features ........................................................................7
5.3 Symbols on the Test Instrument ....................................7
5.4 Controls and Connections .............................................8
5.4.1 Front..............................................................................8
5.4.2 Sides .............................................................................8
5.5
Scope of Functions ............................................................9
5.6 Characteristic Values ..................................................10
5.7 Relevant Standards .....................................................13
6 Initial Startup .....................................................14
6.1 Connecting the Test Instrument to the Mains...............14
6.1.1 Automatic Recognition of Mains Connection Errors .....14
6.2 Connecting Test Probe P1 or P2 .................................15
6.3 International Use..........................................................15
7 Operation...........................................................16
7.1 Basic Test Instrument Operation..................................16
7.2 Entering Text and Numbers .........................................16
7.3 Entry via External USB Keyboard .................................17
7.4 Help Functions (HELP key)...........................................17
8 Test Instrument Settings ..................................18
8.1 System Parameters .....................................................18
8.2 Test Standards / Configuration of Integrated Test
Sequences ..................................................................20
8.2.1 Selecting the Standard Designation and Deactivating
Standards....................................................................20
8.2.2 Configuring Rotary Switch Positions ............................22
8.2.3 Selecting a Designation and Deactivating Standards in
Case of Update or Extension (enabling function) ..........22
8.3 Bluetooth®Interface (only with feature M01) ................23
9 Extensions (enabling functions/feature) ..........24
9.1 Viewing Available Extensions .......................................24
9.2 Purchasing Extensions.................................................24
9.3 Enabling Extensions at the Test Instrument..................24
10 Connecting and Configuring External
Devices ..............................................................25
10.1 Use of USB Storage Devices .......................................25
10.2 USB Keyboard.............................................................25
10.3 RFID ............................................................................25
10.4 Barcodes / QR Codes .................................................26
10.5 Thermal Printer for Reports..........................................26
11 Inspector Management.................................... 29
11.1 Managing Inspectors................................................... 29
11.1.1 Adding an Inspector.................................................... 29
11.1.2 Editing or Deleting an Inspector................................... 29
11.2
User Rights: Additionally Available for Test Instruments
with SECUTEST DB COMFORT (Z853S or feature KD01) 29
12 Internal Database ............................................. 31
12.1 Test Structure Layout.................................................. 31
12.2 Creating, Editing, Deleting and Searching the Test
Structure..................................................................... 33
12.2.1 Opening the Database ................................................ 33
12.2.2 Creating a Test Structure ............................................ 33
12.3 Display ........................................................................ 33
12.3.1
Switching Between 2 Tree Structure Views
(with SECUTEST ST PRO and SECULIFE ST BASE(25) or
with test instruments including SECUTEST DB+ – Z853R
or feature KB01)...............................................................33
12.3.2 Displaying Measured Values from Saved Tests............ 33
12.3.3 Editing the Database................................................... 33
12.3.4 Searching for Objects.................................................. 34
12.3.5 Clearing the Database................................................. 34
12.4 QuickEdit Function – QEDIT (only with SECUTEST DB
COMFORT – Z853S or feature KD01) ......................... 37
13 Connecting the Device Under Test ................. 38
13.1 List of Possible DUT Connections
Depending on Measurement Type .............................. 38
13.2 Residual Current Monitoring........................................ 39
13.3
Reference Voltage L-PE and Alternative Test Sequence...39
13.4 Manually Specifying the Connection Type for Single
Measurements ............................................................ 39
13.5 Manually Selecting a Connection Type / Protection
Class for Test Sequences............................................ 39
13.6 Special Conditions ...................................................... 39
13.7 2nd Test Probe (only with feature H01,
e.g. SECUTEST ST PRO) ............................................ 39
13.8 Connection Prompts ................................................... 40
13.9 Connection Tests Conducted by the Test Instrument .. 40
14 Important Basic Information on Tests and
Measurements.................................................. 41
14.1 Important Safety Information ....................................... 41
14.1.1 Switching Loads – Maximum Starting Current............. 41
14.2 Measurement with DUT Connected to Line Voltage..................41
14.3 Measurement of Insulation Resistance and Equivalent Leakage
Current (alternative leakage current measuring method) ........41
14.3.1
Measurements in IT Systems............................................41
14.4 Next Test Date............................................................ 42
15 Single Measurements ...................................... 43
15.1 General ....................................................................... 43
15.2 Meaning of Icons in the User Interface ........................ 44
15.3 Displaying the Last Measured Values .......................... 44
15.4 Saving Single Measurements and Measurement Series44
15.4.1 Measuring Sequence with Pre-Selection of the Test
Object......................................................................... 44
15.4.2 Measuring Sequence with Subsequent Entry of the
Test Object ................................................................. 44
15.4.3 Measurement Procedure with Entry of a New Test
Object at the End of the Test....................................... 45
15.4.4 Alternative: Transferring Measurement Data to the PC
(IZYTRONIQ – push-print) ........................................... 45
15.5 Abbreviations for Measuring Functions (overview)........ 45

Gossen Metrawatt GmbH 3
15.6 Measuring Protective Conductor Resistance – RPE.....46
15.7 Insulation Resistance Measurement – RINS.................50
15.8 Measuring Leakage Current.........................................53
15.8.1 Protective Conductor Current – IPE .............................54
15.8.2 Touch Current – IT.......................................................58
15.8.3 Device Leakage Current – IE........................................61
15.8.4 Leakage Current from the Applied Part – IA.................64
15.8.5 Patient Leakage Current – IP .......................................66
15.9 Probe Voltage – U .......................................................68
15.10 Measuring Voltage – U (only with feature I01, e.g.
SECUTEST ST PRO) ...................................................69
15.11 Measuring Time to Trip for RCDs of the Type PRCD –
tPRCD.........................................................................70
15.12 Function Test – P.........................................................71
15.13 Testing Extension Cords for Correct Function – EL1 ....72
16 Special Functions – EXTRA..............................74
17 Test Sequences (automatic test sequences) ..76
17.1 General Settings
(Setup: Auto Measurements parameter).......................77
17.2 Configuring Test Sequences........................................79
17.2.1 Test Sequence Menu: View and Icons.........................79
17.2.2 Selecting and Configuring the Integrated Test
Sequence at the Test Instrument.................................81
17.2.3 User-Defined Test Sequences
(necessitates SECUTEST DB+ – Z853R or feature
KB01 – and IZYTRONIQ) .............................................89
17.3 Connecting the DUT ....................................................89
17.4 Selecting a Test Object................................................89
17.5 Checking Connection and Starting the Test Sequence 90
17.6 Executing and Evaluating Test Steps ...........................90
17.7 End of the Test Sequence ...........................................91
17.8 Saving Test Results .....................................................92
17.9 Remote Control – Automated Test Sequence Control
with IZYTRONIQ Software ...........................................93
18 Reports..............................................................94
18.1 Print Settings...............................................................94
18.2 Saving Reports to a USB Flash Drive HTML)................94
18.3 Sending Reports to the Printer.....................................94
19 Transferring and Saving Test Structures and
Measurement Data (test instrument data base)
..95
19.1 Export – Transferring Test Structures and Measurement
Data from the Test Instrument to the PC (IZYTRONIQ)..... 95
19.1.1 Via USB Cable.............................................................95
19.1.2 Via USB Flash Drive (only with SECUTEST DB+
database extension – Z853R or feature KB01).............95
19.2
Import – Loading Test Structures Created in the Software
(IZYTRONIQ) to the Test Instrument (only with SECUTEST
DB+ database extension
– Z853R or feature KB01).......95
19.3 Backup and Restore via USB Flash Drive ....................96
20 Maintenance .....................................................97
20.1 Technical Safety Inspections........................................97
20.2 Housing Maintenance..................................................97
20.3 Test Instrument Self-Tests...........................................97
20.4 Backup Battery for Real-Time Clock ............................97
20.5 Fuse Replacement.................................................................... 97
20.6 Calibration ...................................................................97
20.6.1 Required Recalibration Interval.....................................97
20.6.2 Setting Calibration and Recalibration Dates .................98
20.7 Software/Firmware Update (system info parameter).....98
21 Troubleshooting: Warnings, Error Messages
and Notes ..........................................................99
21.1 Types.......................................................................... 99
21.2 List of Error Messages .............................................. 100
22 Contact, Support and Service ........................109
23
Returns and Environmentally Sound Disposal . 109
24 CE Declaration ................................................110

4Gossen Metrawatt GmbH
1 Safety Instructions
Observe this documentation, in particular all included safety infor-
mation, in order to protect yourself and others from injury, and to
prevent damage to the test instrument.
• Carefully and completely read and adhere to these operating
instructions.
The respective document can be found at http://www.gos-
senmetrawatt.com. Retain the document for future reference.
• Tests/measurements may only be performed by a qualified
electrician, or under the supervision and direction of a quali-
fied electrician. The user must be instructed by a qualified
electrician concerning performance and evaluation of the
tests/measurements.
• Observe and comply with all safety regulations which are
applicable for your work environment.
• Wear suitable and appropriate personal protective equipment
(PPE) whenever working with the test instrument.
Be aware that PPE may be required for the device under test
and wear it if necessary.
• The functioning of active medical devices (e.g. pacemakers,
defibrillators) and passive medical devices may be affected by
voltages, currents and electromagnetic fields generated by
the test instrument and the health of their users may be
impaired. Implement corresponding protective measures in
consultation with the manufacturer of the medical device and
your physician. If any potential risk cannot be ruled out, do not
use the test instrument.
• Use only the specified accessories (included in the scope of
delivery or listed as options) with the test instrument.
• Carefully and completely read and adhere to the product doc-
umentation for optional accessories. Retain these documents
for future reference.
• Use the test instrument in undamaged condition only.
Inspect the test Instrument before use. Pay particular attention
to damage, interrupted insulation or kinked cables.
Damaged components must be replaced immediately.
• Accessories and cables may only be used as long as they’re
fully intact.
Inspect accessories and all cables and before use. Pay partic-
ular attention to damage, interrupted insulation or kinked
cables.
• If the test instrument or its accessories don’t function flaw-
lessly, permanently remove the instrument/accessories from
operation and secure them against inadvertent use.
• If the test instrument or accessories are damaged during use,
for example if they’re dropped, permanently remove the
instrument/accessories from operation and secure them
against inadvertent use.
• Do not use the test instrument and its accessories after long
periods of storage under unfavorable conditions (e.g. humid-
ity, dust or temperature).
• Do not use the test instrument and its accessories after
extraordinary stressing due to transport.
• Only use the test instrument and its accessories within the
limits of the specified technical data and conditions (ambient
conditions, IP protection code, measuring category etc.).
• The test instrument and the accessories may only be used for
the tests/measurements described in the documentation for
the test instrument.
• The test instrument may only be connected to TN, TT or IT
electrical systems with a maximum of 240 V (nominal voltage)
which comply with applicable safety regulations (e.g.
IEC 60346, VDE 0100) and are protected with a fuse or circuit
breaker with a maximum rating of 16 A.
• The test instrument is equipped with fuses. The test instru-
ment may only be used as long as the fuses are in flawless
condition. Defective fuses must be replaced.
• Do not perform any measurements in electrical systems with
the test Instrument. It has been neither designed nor
approved for this purpose.
• Plugging in the measurement cables must not necessitate any
undue force.
• Never touch conductive ends (e.g. of test probes).
• Fully unroll all measurement cables before starting a test/mea-
surement. Never perform a test/measurement with the mea-
surement cable rolled up.
• Avoid short circuits due to incorrectly connected measure-
ment cables.
• Conduct a probe check after completing each test.
• The test instrument must be operated within the same electri-
cal system as the test object.
• Unexpected voltages may occur at devices under test (for
example, capacitors can be dangerously charged). Take
appropriate precautions.
• The fuses may only be replaced when the test instrument is
voltage-free, i.e. it must be disconnected from mains supply
power and may not be connected to a measuring circuit.
The fuse type must comply with the specifications in the tech-
nical data or the labeling on the test instrument.
• Instruments with feature M01: The test instrument is equipped
with a Bluetooth®module. Determine whether or not use of
the implemented frequency band of 2.402 to 2.480 GHz is
permissible in your country.
• Always create a backup copy of your measurement data.
Please refer to this document for further information, for
example see section 19 “Transferring and Saving Test Struc-
tures and Measurement Data (test instrument data base)”.
• Observe and comply with the respectively applicable national
data protection regulations. Use the corresponding functions
provided by the test instrument such as password protection,
as well as other appropriate measures.

Gossen Metrawatt GmbH 5
2 Applications
Please read this important information!
2.1 Intended Use / Use for Intended Purpose
Safety of the operator, as well as that of the test instrument, is
only assured when it’s used for its intended purpose.
The SECUTEST ST BASE, the SECUTEST ST BASE10, the
SECUTEST ST PRO, SECULIFE ST BASE and the SECULIFE ST
BASE25 are test instruments for testing the electrical protective
measures of electrical devices, electrical medical equipment and
electric welding equipment.
All test instruments include measuring and test functions for
checking the effectiveness of the protective measures required in
accordance with the respective test standards for the particular
field of technology. Single measurements and test sequences can
be executed.
Test sequences (semi-automatic test procedures) can be used in
an integrated, i.e. preconfigured form, or defined individually by
the user.
The integrated test sequences consist of a preconfigured series of
individual tests with subsequent documentation, as stipulated in
the respective standard. They can thus be used to repeatedly and
efficiently perform standards-compliant tests. Their progress is
interrupted by safety-related pauses, as well as associated warn-
ings and instructions. As a result, the level of protection provided
to the user is greater than demanded by sections 4.1.6 and 4.1.7
of standard “IEC / 61557-16 / DIN EN 61557-16 / VDE 0413-16”
with regard to “automated test sequences”.
The integrated test sequences can be used to comply with the
following standards:
• VDE 0701-0702 / ÖVE E 8701 / SNR 462638
Inspection after repair, modification of electrical appliances –
Periodic inspection on electrical appliances
• IEC 62353 / EN 62353 / VDE 0751-1
Medical electrical equipment –
Recurrent test and test after repair of medical electrical equip-
ment
• IEC 60974-4 / EN 60974-4 / VDE 0544-4
Arc welding equipment
Part 4: Periodic inspection and testing
• NEN 3140
Bedrijfsvoering van elektrische installaties - Laagspanning
• EN 50678 / VDE 0701
General Procedure for Verifying the Effectiveness of the Pro-
tective Measures of Electrical Equipment After Repair
• EN 50699 / VDE 0702
Recurrent Test of Electrical Equipment
• IEC 62368 / EN 62368 / VDE 0868-1
Audio/video, information and communication technology
equipment
• IEC 62911 / EN 62911 / VDE 0868-911
Audio, video and information technology equipment – Routine
electrical safety testing in production
Attention!
!
The integrated, preconfigured test sequences do not in-
clude all of the tests prescribed by the product standard
which are required for type testing! They’re restricted to
the tests which are required as a rule after repair or
during maintenance work and for occupational health
and safety measures, as well as for quality assurance in
production.
Note
Availability of the individual integrated test sequences
depends on the test instrument type (SECUTEST ST... or
SECULIFE ST...), the selected features (order features)
and the enabled extensions (activations).
Refer to your order / test instrument and data sheet for
details.
Suitable, database-driven test software is available, namely IZY-
TRONIQ. This software facilitates test organization and the man-
agement of test data from a broad range of test instruments. It also
provides extended functions such as remote control in connection
with the respective test instrument – support for extended func-
tions depends on the test instrument and its order features or
enabled extensions (activations). The software itself is included
with test equipment sets, or can be purchased separately.
The test instrument housing is compact, impact resistant and
includes an integrated rubber protector for mobile use, e.g. in fac-
tories, on construction sites and in industrial environments.
The front panels and housings of SECULIFE ST BASE and SECU-
LIFE ST BASE25 test instruments are also furnished with antimi-
crobial properties, which make it possible to use them in hygieni-
cally sensitive areas.
Standards Table – by Device and Reason for Testing
Reason for Testing
DUTs Repair
Periodic Testing
(occupational
safety, DGUV)
Testing in Production
/ Routine Testing
Electric devices
(as a rule with mains
power cable)
including extension
cords and multiple
outlets
EN 50678 /
VDE 0701
VDE 0701-0702 /
ÖVE E 8701 /
SNR 462638
NEN 3140
EN 50699 /
VDE 0702
VDE 0701-0702 /
ÖVE E 8701 /
SNR 462638
NEN 3140
IT equipment
Not defined
To a given extent:
IEC 62368 /
EN 62368 /
VDE 0868-1
IEC 62911 /
EN 62911 /
VDE 0868-911
VDE 0701-0702 /
ÖVE E 8701 /
SNR 462638
EN 50699 /
VDE 0702
VDE 0701-0702 /
ÖVE E 8701 /
SNR 462638
NEN 3140
IEC 62911 /
EN 62911 /
VDE 0868-911
Medical
electrical equipment
IEC 62353 /
EN 62353 /
VDE 0751-1
IEC 62353 /
EN 62353 /
VDE 0751-1
IEC 62353 /
EN 62353 /
VDE 0751-1
To a given extent:
IEC 60601-1 /
EN 60601-1 /
VDE 0750-1
Arc welding
equipment
IEC 60974-4 /
EN 60974-4 /
VDE 0544-4
IEC 60974-4 /
EN 60974-4 /
VDE 0544-4

6Gossen Metrawatt GmbH
Table of Standard Designations for Available Tests
Key: = specified test
2.2 Use for Other than Intended Purpose
Using the test instrument for any purposes other than those
described in the condensed operating instructions, or in these
operating instructions for the test instrument, is contrary to use for
intended purpose.
2.3 Liability and Guarantee
Gossen Metrawatt GmbH assumes no liability for property dam-
age, personal injury or consequential damage resulting from
improper or incorrect use of the product, in particular due to fail-
ure to observe the product documentation. Furthermore, all guar-
antee claims are rendered null and void in such cases.
Nor does Gossen Metrawatt GmbH assume any liability for data
loss.
2.4 Opening the Instrument / Repairs
The test instrument may only be opened by authorized, trained
personnel in order to ensure flawless, safe operation and to
assure that the guarantee isn’t rendered null and void. Even origi-
nal replacement parts may only be installed by authorized, trained
personnel.
Unauthorized modification of the test instrument is prohibited.
If it can be ascertained that the test instrument has been opened
by unauthorized personnel, no guarantee claims can be honored
by the manufacturer with regard to personal safety, measuring
accuracy, compliance with applicable safety measures or any
consequential damages.
If the guarantee seal is damaged or removed, all guarantee claims
are rendered null and void.
3 Documentation
Scope of Validity
These operating instructions describe a test instrument with soft-
ware/firmware version FW 3.3.0.
See section 20.7 “Software/Firmware Update (system info param-
eter)”.
Terminology
EN 50678 /
VDE 0701
EN 50699 /
VDE 0702
VDE 0701-0702 /
ÖVE E 8701 /
SNR 462638
IEC 60974-4 /
EN 60974-4 /
VDE 0544-4
IEC 62353 /
EN 62353 /
VDE 0751-1
IEC 60601-1 /
EN 60601-1 /
VDE 0750-1
IEC 62368 /
EN 62368 /
VDE 0868-1
IEC 62911 /
EN 62911 /
VDE 0868-911
Single Measurements
Protective conductor resistance 
Insulation resistance 
Protective conductor current 
Earth leakage current 
Primary leakage current 
Device leakage current 
Touch current  
Current from welding circuit 
Patient leakage current 
Leakage current from applied part 
Measuring Method
Alternative (equivalent [device] leakage
current)

Differential current 
Direct  
Test instrument SECUTEST ST... or SECULIFE ST...
Device under test Electrical device to be tested, medical
electrical equipment or electric welding
equipment
(DUT)
Test object Electronic representation of a specific
test object in the internal test instrument
database
(unequivocal allocation to a real DUT by
means of an ID)
Test sequence Series of semi-automatic tests or test
steps
Integrated test
sequence Test sequence (see above) which is avail- able upon delivery or after enabling in the
instrument. Cannot be changed (test
parameters are configurable).
User-defined test
sequence A test sequence (see above) which is created individually by the user

Gossen Metrawatt GmbH 7
4 Getting Started
➭Read and adhere to the product documentation. In particular
observe all safety information in the documentation, on the
test instrument and on the packaging.
– See “Safety Instructions” on page 4.
– See “Applications” on page 5.
➭Familiarize yourself with the test instrument.
– See “Test Instrument” on page 7.
– See “Initial Startup” on page 14.
– See “Operation” on page 16.
➭Prepare the test instrument for use.
– See “Test Instrument Settings” on page 18.
– See “Extensions (enabling functions/feature)” on page 24.
– See “Connecting and Configuring External Devices” on
page 25.
– See “Inspector Management” on page 29.
– See “Internal Database” on page 31.
➭Perform measurements:
– See “Connecting the Device Under Test” on page 38.
– See “Important Basic Information on Tests and Measure-
ments” on page 41.
– See “Single Measurements” on page 43.
– See “Special Functions – EXTRA” on page 74.
– See “Test Sequences (automatic test sequences)” on
page 76.
➭Generate a report if required. See “Reports” on page 94.
➭Transfer measurement data to IZYTRONIQ software if re-
quired. See “Transferring and Saving Test Structures and
Measurement Data (test instrument data base)” on page 95.
5 Test Instrument
5.1 Scope of Delivery
The scope of delivery varies depending on which test instrument
variant has been ordered, and is country-specific. Information
concerning the scope of delivery can be found in your order and
in the data sheet, in which all order information is listed.
5.2 Features
The test instruments are available with various features. These
can be selected when placing an order.
The basic test instruments include the following features:
* For voltage measurement, or for connecting a current clamp sensor for current
measurement or an AT3 adapter, and for temperature measurement via a Pt100
or Pt1000 temperature sensor
Key: Included, Optional
5.3 Symbols on the Test Instrument
The symbols on the test instrument have the following meanings:
IZYTRONIQ test software is required for some functions.
IZYTRONIQ may be included in the scope of delivery, for
example with standard models and instrument sets (see
data sheet).
If this is not the case or if you would like to take advan-
tage of a variant with a larger scope of functions, you can
purchase IZYTRONIQ separately. Detailed information is
available at:
https://www.izytron.com/
Install IZYTRONIQ to your system. All relevant informa-
tion, as well as information about the software, can be
found in IZYTRONIQ online help.
Note
Features SECUTEST ST BASE SECUTEST ST BASE10 SECUTEST ST PRO SECULIFE ST BASE SECULIFE ST BASE25
Touchscreen / keyboard E01 
10 A RPE test current G01 
25 A RPE test current G02 
2nd test probe H01 
Voltage measuring input * I01 
Integrated test sequences for
EN 50678 / VDE 0701,
EN 50699 / VDE 0702,
IEC 62368 / EN 62368 / VDE 868-1,
IEC 62911 / EN62911/ VDE 868-911
KE 
SECUTEST DB+ KB01 
SECUTEST DB COMFORT KD01 
Bluetooth®M01
Antimicrobial housing — 
250 V CAT II
Maximum permissible voltage and measuring cate-
gory between connections P1 (test probe), the test
socket and ground
Warning regarding dangerous electrical voltage
Warning concerning a point of danger
(attention: observe documentation!)
European conformity marking
The test instrument may not be disposed of with
household trash (see section 23 “Returns and Envi-
ronmentally Sound Disposal”).
Further information regarding the WEEE mark can
be accessed on the Internet at www.gossenme-
trawatt.com by entering the search term “WEEE”.
If the guarantee seal is damaged or removed, all
guarantee claims are rendered null and void.
!

8Gossen Metrawatt GmbH
5.4 Controls and Connections
5.4.1 Front
5.4.2 Sides
Voltage measur-
ing inputs1
MEM: database
ESC:back
HELP: help images
START STOP: start/stop
– Single
measurement
– Test sequence
Finger contact
PRINT:print via USB
Function keys
Display of special symbols:
– Measurement at IT mains active
– Offset for RPE active
Connection (jack socket) for
power supply – SECUTEST
CLIP (Z745H)2
Reinforcing sleeve:
black: max. 16 A
green: max. 25 A
Mains to test socket
SFC: Normal status
Mains to test socket
SFC: N interrupted
White/silver highlighted &
fused high-current path
Fuse compartment
(fuse link for probe
input P1)
Green switch level
Single measurements
Test probe (P1)
Rotary switch for
Function selection
Orange rotary switch level
Test sequences A1 to A9
(test sequences per
standard)
LCD panel
Carrying handle and tilt stand
Connections for 2nd test probe
(P2 for 2-pole measurement)1
1
Only test instruments with feature H01, e.g. SECUTEST ST PRO
2
See also operating instructions for the device.
Softkeys
Displayed icons for devices connected to the USB
master port (see next page).
USB slave for
connection to PC
Test socket (country-specific) for connecting DUTs
Caution!
Depending on measuring task, test probe may be conduct line voltage.
!
USB master
for connecting keyboard, barcode/RFID reader2, printer2and USB flash drive2(only FAT32 formatted)
Fuse link 2 for the mains
connection
Fuse link 1 for the mains connection
Socket (country-specific) for mains power
via inlet plug (country-specific)
Additional fuse link
for 10 A1protective conductor test

Gossen Metrawatt GmbH 9
5.5 Scope of Functions
Single measurements and test sequences can be executed with
the test instruments.
Single Measurements
Switch Positions at Green Rotary Switch Level
1
10/25 A R
PE
measurements are only possible with line voltages of 115/
230 V and line frequencies of 50/60 Hz.
2
Voltage measuring inputs only with test instruments including feature I01
(e.g. SECUTEST ST PRO and SECULIFE ST BASE(25))
3
Connection for 2
nd
test probe for two-pole measurement with test instru-
ment including feature H01(e.g. SECUTEST ST PRO or SECULIFE ST
BASE(25))
4
Measurement of time to trip isn’t possible in IT systems.
5
No checking for reversed wires takes place when the EL1 adapter is used.
6
Connection type not available with feature G02 (e.g. SECULIFE ST BASE25)
Key:
Alternative = alternative measurement
(equivalent leakage current measurement)
Differential = differential current measurement
Direct = direct measurement
LN(TS) = short-circuited conductors L and N at test socket
P1 = measurement with test probe P1
P1-P2 = 2-pole measurement with test probes P1 and P2
PE-P1 = measurement between PE and test probe P1
PE(TS) = protective conductor at the test socket
PE(mains) = protective conductor at the mains connection
Integrated Test Sequences
The test instrument is equipped with preconfigured, integrated
test sequences which are selected via the switch positions at the
orange rotary switch level.
Note
Availability of the individual integrated test sequences
depends on the test instrument type (SECUTEST ST... or
SECULIFE ST...), the selected features (order features)
and the enabled extensions (activations).
Refer to your order / test instrument and data sheet for
details.
The integrated test sequences are freely assignable, i.e. they can
be individually assigned to the rotary switch positions (because
there are more integrated test sequences than rotary switch posi-
tions). But the test instrument is preconfigured upon delivery.
Which integrated test sequences are assigned to the rotary switch
positions on your test instrument upon delivery depends on sev-
eral factors: test instrument type (SECUTEST ST... or SECULIFE
ST...), selected features and enabled extensions.
Due to the great variety of possible combinations, a list of all deliv-
ery statuses would go beyond the scope of this documentation.
In order to provide you with an impression, the delivery status of a
standard test instrument is listed below as an example.
SECUTEST ST PRO, German version, default settings:
Auto = automatic detection
Details concerning test sequences can be found in section 17
“Test Sequences (automatic test sequences)”.
Rotary Switch Position
Measuring Functions
Test Current/Voltage Measurement Type,
Connection Type
RPE
section
15.6
RPE Protective conductor resistance PE(TS) - P1 passive
PE(TS) - P1 active
PE(mains) - P1 6
PE(mains) - P1 clamp
2,
6
P1–P2 3
IPTest current (200 mA)
Feature G01 (e.g. SECUTEST ST BASE(10)/
PRO and SECULIFE ST BASE): 10 A 1
and feature G02 (e.g. SECULIFE ST
BASE25): 25 A 1
RINS
section
15.7
RINS Insulation resistance (PC I/PC II) LN(TS) - PE(TS)
LN(TS) - P1
P1–P2 3
PE(mains) - P1
PE(TS) - P1
LN(TS) - P1//PE(TS)
UINS Test voltage
IPE
section
15.8.1
IPE Protective conductor current, RMS Direct
Differential
Alternative
AT3-Adapter 2
Clamp 2
IPE~ AC component
IPE= DC component
ULPE Test voltage
UGen Reference voltage (alternative)
IT
section
15.8.2
ITTouch current, RMS Direct
Differential
Alternative (P1)
Permanent connection
Alternative (P1–P2)
IT~ AC component
IT= DC component
ULPE Test voltage
UGen Reference voltage (alternative)
IE
section
15.8.3
IEDevice leakage current, RMS Direct
Differential
Alternative
AT3-Adapter 2
Clamp 2
IE~ AC component
IE= DC component
ULPE Test voltage
UGen Reference voltage (alternative)
IA
section
15.8.4
IA Leakage current from the applied part, RMS
Direct (P1)
Alternative (P1)
Perm. conn. (P1)
ULPE Test voltage
UGen Reference voltage (alternative)
IP
section
15.8.5
IPPatient leakage current, RMS
Direct (P1)
Perm. conn. (P1)
IP~ AC component
IP= DC component
ULPE Test voltage
U
section
15.10
UProbe voltage, RMS P1–P2
P1–P2 (with mains *)
* Polarity parameter
U~ Alternating voltage component
U= Direct voltage component
U Measuring voltage, RMS 2
V – COM
V – COM (with mains)
U~ Alternating voltage component 2
U= Direct voltage component 2
tPRCD 4
section
15.11
ta PRCD time to trip for 10/30 mA PRCDs
ULN Line voltage at the test socket
P
section
15.12
Function test at the test socket
Polarity parameter
ICurrent between L and N
UVoltage between L and N
fFrequency
PActive power
SApparent power
PF Power factor
Probe measuring functions
EL1
section
15.13
Extension cord with adapter:
continuity, short-circuit, polarity (reversed wires 5)
EL1 adapter
EL1 adapter (continu-
ity only)
AT3-IIIE adapter
VL2E adapter
EXTRA
section
16
Reserved for expansion within the framework of software updates
°C Temperature measurement 2with Pt100/
Pt1000
V – COM
ICL Current clamp measurement 2
with current clamp sensor
V – COM
Integrated Test Sequences, Switch Positions at Orange Rotary Switch Level
Rotary
Switch
Position
Standard /
Test Sequence
Meas.
Type
Connection Type Protec-
tion
Class
Voltage
Specifica-
tion
A1 EN 50699 Auto Auto
Auto
A2 EN 50678 Auto Auto Auto
A3 VDE 0701-0702 Auto Auto Auto
A4 IEC 60974-4 Active Auto Auto U(0) DC
A5 IEC 62353 Passive Auto BF Auto
A6 EN 50699 Passive Test socket Auto
A7 EN 50678 Passive Test socket Auto
A8 EN 50699-VLTG VLTG EL1 adapter PC I
A9 EN 50699 Active Auto Auto

10 Gossen Metrawatt GmbH
5.6 Characteristic Values
Func-
tion
Measured
Quantity
Display Range/
Nominal Range of
Use
Reso-
lution
Nominal
Voltage
UN
Open-
Circuit
Voltage
U0
Nom.
Current
IN
Short-
Circuit
Current
ISC
Internal
Resis-
tance
RI
Refer-
ence
Resis-
tance
RREF
Measuring
Uncertainty
Intrinsic
Uncertainty
Overload
Capacity
Value Time
Tests
Protective conduc-
tor resistance
RPE
1 999 m1 m
—< 24 V
AC or DC —
>
200 mA
AC / DC
> 10 A AC
5
>
35 A AC
11)
——
(15% rdg.+
10 d)
>10d
> 10.0 :
(10% rdg.+
10 d)
(10% rdg.+ 10 d)
>10d
264 V
250 mA
16 A AC
5
Cont.
1.00 ... 9.99 10 m
10.0 27.0 
100 m 
>
42 A AC
11) 15 s
Insulation resis-
tance 9
RINS
10 999 k1k
50 500
VDC
1.0 • UN
1.5 • UN>1mA <2mA — —
(5% rdg.+ 4 d)
>10d
 (2.5% rdg.+2 d)
> 10 d
264 V Cont.
1.00 9.99 M10 k
10.0 99.9 M100 k20 M:
(10% rdg.+
8d)
20 M:
 (5% rdg.+4 d)
100 300 M1M
Leakage current,
alternative
measurement 2
IPE, IT, IE, IA
0 ... 99 A1A
—
50 ...
250 V~
– 20/+10%
—<1.5mA
>150k 
1k
10 
 (5% rdg.+ 4 d)
>10d
> 15 mA:
(10% rdg.+
8d)
 (2% rdg.+2 d) > 10 d
> 15 mA:
 (5% rdg.+ 4 d)
264 V Cont.
100 ... 999 A1A
1.00 ... 9.99 mA 10 A
10.0 ... 30.0 mA 100 A
Leakage current,
direct measure-
ment 3
IPE, IT, IE, IA, IP
Ip only: 0.0 ...
99.9 A100 nA
————
1k
10 1k(5% rdg.+ 4 d)
> 10 d
 (2.5% rdg.+2 d)
> 10 d
264 V Cont.
0 ... 99 A1A
100 ... 999 A1A
1.00 ... 9.99 mA 10 A
10.0 ... 30.0 mA 100 A
Leakage current,
differential cur-
rent measure-
ment 4
IPE, IT, IE
0 ... 99 A1A
— — ————
(5% rdg.+ 4 d)
> 10 d
 (2.5% rdg.+2 d)
>10d
264 V Cont.
100 ... 999 A1A
1.00 ... 9.99 mA 10 A
10.0 ... 30.0 mA 100 A
Function Test at the Test Socket
Line voltage
UL–N 10 100.0 240.0 V~0.1V — — ———— —
 (2% rdg.+2 d) 264 V Cont.
Load current IL0 16.00 A RMS 10mA— — ———— —
 (2% rdg.+2 d) 16 A Cont.
Active power P 0 3700 W 1 W — — — — — — —
 (5% rdg.+10 d)
>20d
264 V Cont.
20 A 10 min
Apparent power S 0 4000 VA 1 VA Calculated value, UL–N • IV
 (5% rdg.+10 d)
>20d
264 V Cont.
Power factor PF
with sinusoidal
waveform: cos
0.00 1.00 0.01 Calculated value, P / S, display > 10 W (10% rdg.+5 d) 264 V Cont.
Line frequency f 0 ... 420.0 Hz 0.1 Hz — — — — — — —
 (2% rdg.+2 d) 264 V Cont.
t
PRCD Time to trip 0.1 ... 999.0 ms 0.1 ms — — 30 mA — — —
 5 ms — 264 V Cont.
Voltage Measurement
Probe voltage
(probe P1 to PE)
, and
0.0 ... 99.9 V
100 ... 264 V
100 mV
1V
————
3M
——
 (2% rdg.+2 d) 264 V
Cont.
Measuring voltage
(V-COM sockets
6
)
, and
0.0 ... 99.9 V
100 ... 300 V
1M
 (2% rdg.+2 d)
> 45 Hz ... 65 Hz
 (2% rdg.+5 d)
> 65 Hz ... 10 kHz
 (5% rdg.+5 d)
> 10 kHz ... 20 kHz
300 V
,
and
ILeaka
ge
Leakage current
via AT3-IIIE
adapter Z745S
6, 8
0.00 ... 0.99 mA
0.01 mA
— — ———— —
(2% rdg.+2 d)
>10d
without adapter
253 V Cont.
1.0 ... 9.9 mA 0.1 mA
10 ... 20 mA 1mA
Temp
Temperature
with Pt100 sensor – 200.0 ...
+850.0 C
0.1 C—<20V– 1.1mA—— — (2% rdg.+1 C) 10 V Cont.
Temperature
with Pt1000 sen-
sor
– 150.0 ...
+850.0 C

Gossen Metrawatt GmbH 11
2
Known from previous standards as equivalent leakage current or equivalent patient
leakage current
3
Protective conductor current, touch current, device leakage current, patient
leakage current
4
Protective conductor current, touch current, device leakage current
5
Only with feature G01 (e.g. SECUTEST ST BASE10/SECUTEST ST PRO and
SECULIFE ST BASE)
6
Only with feature I01 (e.g. SECUTEST ST PRO and SECULIFE ST BASE)
7
Measurement types IPE_clamp and IE_clamp
8
Measurement type IPE_AT3 adapter and IE_AT3 adapter
9
The upper range limit depends on the selected test voltage.
10
Voltage at the test socket may be lower than measured line voltage due to
components which limit inrush current.
11
Only with feature G02 (e.g. SECULIFE ST BASE25)
Key: rdg. = reading (measured value), d = digit(s)
Testing Times, Automatic Sequence
Testing times (“measurement duration” parameter) can be set separately
for each rotary switch position during configuration of the sequence
parameters. Testing times are neither tested nor calibrated.
Emergency Shutdown During Leakage Current Measurement
As of 10 mA of differential current (can also be set to 30 mA),
automatic shutdown ensues within 500 ms. This shutdown does
not take place during leakage current measurement with clamp
meter or adapter.
See section 13.2 “Residual Current Monitoring”.
Influencing Quantities and Influence Error
IClamp
Current via
current clamp
sensor
[1 mV : 1 mA]
(V-COM sockets
6, 7
)
1 ... 99 mA 1mA
(1 mV)
— — ———— —
(2% rdg.+2 d)
>10d
20 Hz ... 20 kHz
without clamp
253 V Cont.
0.1 ... 0.99 A 0.01 A
(10 mV)
1.0 ... 9.9 A 0.1 A
(100 mV)
10 ... 300 A 1A (1 V)
Current via
current clamp
sensor
[10mV:1mA]
(V-COM sockets
6, 7
)
0.1 ... 9.9 mA 0.1 mA
(1 mV)
— — ———— —
10 ... 99 mA 1mA
(10 mV)
0.10 ... 0.99 A 0.01 A
(100 mV)
1.0 ... 30.0 A 0.1 A (1 V)
Current via
current clamp
sensor
[100 mV : 1 mA]
(V-COM sockets
6, 7
)
0.01 ... 0.99 mA
0.01 mA
(1 mV)
— — ———— —
1.0 ... 9.9 mA 0.1 mA
(10 mV)
10 ... 99 mA 1mA
(100 mV)
0.10 ... 3.00 A 0.01 A (1 V)
Current via
current clamp
sensor
[1000 mV : 1 mA]
(V-COM sockets
6, 7
)
1 ... 99 μA 1μA
(1 mV)
— — ———— —
0.10 ... 0.99 mA
0.01 mA
(10 mV)
1.0 ... 9.9 mA 0.1 mA
(100 mV)
10 ... 300 mA 1mA (1 V)
Func-
tion
Measured
Quantity
Display Range/
Nominal Range of
Use
Reso-
lution
Nominal
Voltage
UN
Open-
Circuit
Voltage
U0
Nom.
Current
IN
Short-
Circuit
Current
ISC
Internal
Resis-
tance
RI
Refer-
ence
Resis-
tance
RREF
Measuring
Uncertainty
Intrinsic
Uncertainty
Overload
Capacity
Value Time
Influencing Quantity /
Sphere of Influence
Designation
per
IEC 61557-16
Influence Error
% rdg.
Change of position E1 —
Change to test equipment supply
voltage E2 2.5
Temperature fluctuation E3
Specified influence error valid
starting with temperature
changes as of 10 K:
0 ... 40 C2.5
Amount of current at DUT E4 2.5
Low frequency magnetic fields E5 2.5
DUT impedance E6 2.5
Capacitance during insulation
measurement
E7 2.5
Waveform of measured current
E8
49 51 Hz 2 with capacitive load
(for equivalent leakage current)
45 100 Hz 1 (for touch current)
2.5 for all other measuring
ranges

12 Gossen Metrawatt GmbH
Reference Ranges
Line voltage 230 V AC 0.2%
Line frequency 50 Hz 2Hz
waveform
Sine (deviation between effective and rectified value < 0.5%)
Ambient temperature +23 C2K
Relative humidity 40 60%
Load resistors Linear
Nominal Ranges of Use
Nominal line voltage 100 V 240 V AC
Nominal line frequency 50 Hz 400 Hz
Line voltage waveform Sinusoidal
Temperature 0 C +40 C
Ambient Conditions
Storage temperature -20 C +60 C
Relative humidity Max. 75%, no condensation allowed
Elevation Max. 2000 m
Place of use Indoors, except within specified ambient
conditions
In order to avoid deviation due to excessive temperature fluctua-
tion, e.g. after outdoor transport at low temperature and subse-
quent operation in a warm indoor environment, it’s advisable to
wait until the test instrument has acclimatized before starting any
measurements.
If the test instrument is colder than the ambient air, condensation
may occur at high humidity, i.e. condensate may accumulate on
components. This could result in the occurrence of parasitic
capacitances and resistances which affect the measuring circuit
and measuring accuracy.
Power Supply
Supply network TN, TT or IT
Line voltage 90 V 264 V AC
Line frequency 50 Hz 400 Hz
Power consumption 200 mA DUT: Approx. 32 VA
10 A DUT: Approx. 105 VA
25 A DUT: Approx. 280 VA
Mains to test socket
(e.g. during function test)
Continuous max. 3600 VA, power is con-
ducted through the instrument only,
switching capacity 16 A, ohmic load, the
AT3-IIS32 (Z745X) adapter (for example)
can be used for current > 16 A AC
Electrical Safety
Protection class I per EN 61140
Nominal voltage 230 V
Test voltage 2.3 kV AC 50 Hz or 3.3 kV DC
(mains circuit / test socket to mains PE ter-
minal, USB, finger contact,
probe(s), test socket)
Measuring category Designed for 300 V CAT II
(but reduced to 250 V CAT II through the
use of fuses for increased user safety. The
user-friendly fuses are replaceable and
replacements are easily obtainable).
Pollution degree 2
Safety shutdown At DUT differential current of > 10 mA,
shutdown time: < 500 ms,
can also be set to > 30 mA
in the event of probe current (electronic
fuse) during:
–
Leakage current measurement:
> 30 mA~/< 500 ms
*
– Protective conductor resistance
measurement:
>250mA~/<1ms
in case of continuous current I > 16.5 A
Fuse Links Mains fuses: 2 ea. FF 500V/16A
Special fuse: M 250V/250mA
10 A RPE test current (feature G01 only):
1 ea. FF 500V/16A
Electromagnetic Compatibility
Product standard EN 61326-1
EN 61326-2-2
USB Data Port
Type USB slave for PC connection / remote
control**
Type 2 ea. USB master,
for data entry devices * with HID boot
inter
face,
for USB flash drive for data backup,
for USB flash drive for saving reports as
HTML files,
for printers *
* See section 10 for compatible devices
** Remote control only with extension: “Remote Control via PC (IZYTRONIQ)”
(included as standard feature with SECUTEST ST PRO and available with
SECUTEST DB+ (Z853R or feature KB01).
Bluetooth®data interface 2.1 + EDR
(test instruments with feature M01 only)
Frequency range Max. 2.5 mW (class II)
Transmission intensity 2400 … 2483.5 MHz
Mechanical Design
Display 4.3" multi-display (9.7× 5.5 cm),
backlit, 480 x 272 pixels
at 24-bit color depth (true color)
Dimensions W × H × D: 295 ×145 × 150 mm
Height with handle: 170 mm
Weight
SECUTEST ST BASE(10)/PRO: approx. 2.5 kg
SECULIFE ST BASE25: approx. 4.0 kg
(depending on the test instrument version)
Protection Housing: IP 40,
Test socket: IP 20
per EN 60529
Table Excerpt Regarding Significance of IP
Codes
SECULIFE ST BASE(25):
Housing with antimicrobial properties per JIS
standard Z 2801
Database
Number of data
records 50,000
1 data record = 1 DUT or location node or
customer or individual measurement
*Firmware version 3.2.0 and lower: 12 mA
Interference emission Class
EN 55011 B
IEC 61000-3-2 B
IEC 61000-3-3 B
Interference
immunity Test Value * Evaluation Criterion
EN 61000-4-2 Contact/atmos. – 4 kV/8 kV B
EN 61000-4-3 10 V/m (80 MHz … 1 GHz) A
EN 61000-4-4 Mains connection – 2 kV B
EN 61000-4-5 Mains connection – 1 kV (LN), 2 kV (LPE) B
EN 61000-4-6 Mains connection – 3 V A
EN 61000-4-8 30 A/m A
EN 61000-4-11 0%: 1 period B
0%: 250/300 periods C
40%: 10/12 periods C
70%: 25/30 periods C
IP XY
(1st digit X)
Protection Against Foreign
Object Ingress
IP XY
(2nd digit Y)
Protection Against Water
Ingress
212.5 mm 0 Not protected
41.0 mm 0 Not protected

Gossen Metrawatt GmbH 13
5.7 Relevant Standards
The test instrument has been manufactured and tested in accor-
dance with the following safety regulations:
EN 61010-1 Safety requirements for electrical equipment for measurement, control
and laboratory use – Part 1: General requirements
EN 60529 Test instruments and test procedures
Degrees of protection provided by enclosures (IP code)
EN 61326-1 Electrical equipment for measurement, control and laboratory use –
EMC requirements – Part 1: General requirements
EN 61326-2
Electrical equipment for measurement, control and laboratory use –
EMC requirements –
Part 2-2: Particular requirements – Test configurations, operational conditions
and performance criteria for sensitive test and measurement equipment for
EMC unprotected applications
EN 61557-16 Electrical safety in low voltage distribution systems up to 1000 V AC
and 1500 V DC – Equipment for testing, measuring or monitoring of
protective measures –
Part 16: Devices for testing the effectiveness of protective measures of
electrical devices and/or electrical medical devices

14 Gossen Metrawatt GmbH
6 Initial Startup
Initial startup of the test instrument is conducted by connecting it
to the power supply. The following sections describe operation,
as well as how to select various basic settings.
6.1 Connecting the Test Instrument to the Mains
➭See section 20 for nominal mains values (nominal ranges of
use).
➭Connect the mains cable to the test instrument via its inlet
plug and insert the mains plug into an electrical outlet. Any ro-
tary switch position can be selected.
If a mains outlet (earthing contact outlet) isn’t available, or if
only a 3-phase outlet is available, the adapter socket can be
used to connect the phase conductor, the neutral conductor
and the protective conductor. The adapter socket has three
permanently attached cables and is included with the KS13
cable set.
Attention!
!
If connection isn’t possible via an earthing contact outlet:
Shut down mains power first.
Then connect the cables from the coupling socket to the
mains using pick-off clips in accordance with the dia-
gram.
Disconnection from mains power is only possible via the
mains plug.
Figure 1 Connecting the Test Instrument to the Mains
6.1.1 Automatic Recognition of Mains Connection Errors
The device automatically recognizes mains connection errors if
the conditions in the following table have been fulfilled. The user is
informed of the type of error, and all measuring functions are dis-
abled in the event of danger.
1
10/25 A R
PE
measurements are only possible with line voltages of 115/
230 V and line frequencies of 50/60 Hz.
2
If the user of the test instrument is too well insulated, the following error mes-
sage may appear: “Interference voltage at mains connection PE”
Attention!
!
In the event of mains connection errors as described in
either of the first two cases in the table above, immedi-
ately disconnect the test instrument from the mains and
arrange to have the error eliminated!
Attention!
!
If, while testing protective conductor potential, you deter-
mine that the mains protective conductor is conducting volt-
age (in accordance with the first two mentioned cases),
no further measurements may be performed with the test in-
strument. If this is the case, potentially dangerous voltage
is also present at the accessible earthing contacts of the
standard socket (test socket). Immediately disconnect
the test instrument from the mains and arrange to have
the fault eliminated at the mains connection.
Note
Voltage at the electrical system’s protective conductor PE may
result in distorted measurement values during testing for
the absence of voltage, or during leakage voltage mea-
surements.
Note
Finger Contact
During this test for correct mains connection, a voltage
measurement is performed between the finger contact
and PE at the test instrument’s mains connection, and its
reference potential is acquired via the user’s body resis-
tance to the conductive start key. In order to obtain reli-
able measurement results, this resistance value must be
less than 1 M. If the user is wearing insulating shoes or
gloves, or is standing on an insulating floor covering,
erroneous measurements and display of the “Interference
voltage at mains connection PE” message may result. Try
to reduce resistance in this case, for example by touching
ground potential with the other hand (e.g. a radiator, but
not an insulating wall etc.).
L1
N
green-yellow
green-yellow
PE
L1
L2
L3
N
PE
L1
L2
L3
N
green-yellow
KS13
Type of Mains
Connection Error Message Condition Measurements
Voltage at
protective conductor PE
to finger contact
(START/STOP key)
Display
Press START/
STOP key
U25 V
key PE:
< 1 M2
All measurements
disabled
Protective conductor PE
and
phase conductor L
reversed and/or
neutral conductor N
interrupted
Voltage at PE
> 100 V
Not possible
(no supply power)
Line voltage
< 180 V / < 90 V
(depending on mains)
UL-N < 180 V
UL-N <90V
Possible under cer-
tain circum-
stances 1
Test for IT/TN system Display
Connection
N PE
> 20 k
Possible under cer-
tain circumstances

Gossen Metrawatt GmbH 15
6.2 Connecting Test Probe P1 or P2
Insert the double plug from test probe P1 or P2 into socket 1 or 2
respectively such that the plug with the white ring makes contact
with the socket with the vertical bar.
The white ring identifies the terminal for the high current conduc-
tor which is safeguarded by the neighboring fuse link.
Attention!
!
Test probe with coil cord (SK2W):
Grip the tip of the test probe firmly, for example if it has
been inserted into a jack socket. Tensioning at the coil
cord may otherwise cause the test probe to snap back
resulting in possible injury.
Attention!
!
Probe Test
Test the probe after completing each test (see also sec-
tion 6.2 “Connecting Test Probe P1 or P2”).
If the fuse at test probe P1 is defective after testing has
been started, all subsequent measurements conducted
using this measuring path will be incorrectly evaluated as
good!
Note
Difficultly in Contacting Exposed Conductive Parts
when Using the Standard Probe with Test Tip
In order to assure good contact, surface coatings must
be removed from devices under test with special tools at
a suitable location.
The tip of test probe P1 isn’t suitable for scratching away
paint, because this may impair its coating and/or
mechanical strength. Brush probe Z745G may be more
suitable than the test probe in certain individual cases.
6.3 International Use
Under the conditions described below, the test instrument can
also be used internationally.
Power Supply
The test instrument is equipped with a broad range input (see sec-
tion 20 “Maintenance”) and is thus suitable for nearly all AC net-
works anywhere in the world.
Depending on selected order features, the plug on the power
supply cable is country-specific. This cable can be removed and
replaced with another suitable power cable with different national
specifications. Ask your electrical components dealer for a suit-
able power supply cable.
The test instrument can also be connected to the power supply
by means of a travel adapter. Observe the following in this regard:
• The travel adapter’s protective earth conductor must demon-
strate faultless continuity.
• The travel adapter must provide the necessary current carry-
ing capacity (16 A or fusing of the upstream installation).
• The test instrument (irrespective of the travel adapter) is only
suitable for active measurements of DUTs with nominal cur-
rent of up to 16 A.
For active tests on DUTs with current exceeding 16 A, use a
suitable test adapter with its own residual current transformer
and contactor (e.g. AT32-DI).
Test Socket
The test instrument’s test socket is also country-specific and
depends on the selected order feature.
A universal test socket adapter is available as an accessory for
the German test socket, which is suitable for DUTs with various
country-specific plugs (see data sheet).
Make sure that the phase conductor is correctly positioned when
connecting the universal test socket adapter: in the “normal polar-
ity” setting, the phase conductor is fed to the contact of the active
conductors in the test socket, which faces the carrying handle.
Voltage and frequency have to be set for the different mains volt-
ages of the DUTs. Enter the appropriate value under:
SETUP 1/3 > All Measurements 1/2 > Ref. Voltage L-PE and
SETUP 1/3 > All Measurements 1/2 > Alt. Test Freq.
These two values influence your work with the test instrument as
follows:
• When the “alternative” measurement type is used for leakage
current measurements involving touch current, protective
earth current and device leakage current, as well as for all
measurement types associated with the measuring function
for leakage current from the applied part:
– The level of the generated test voltage is controlled (current
limiting) on the basis of the selected reference voltage value.
– The frequency of the generated test voltage is controlled
according to the value selected in SETUP.
For all types of leakage current measurement, the displayed leak-
age current value is converted using the selected reference volt-
age value in order to compensate for any deviations of the actual
mains voltage from nominal conditions.

16 Gossen Metrawatt GmbH
7 Operation
7.1 Basic Test Instrument Operation
The test instrument is operated using the keys and the rotary
switch on the test instrument. See “Test Instrument” on page 7.
Softkeys
The softkeys are assigned to different functions depending on the
operating level
Function Keys
Fundamentally, these keys have a permanently assigned function:
In some situations, for example when using the softkey keyboard
(see section 7.2 below), an alternative function appears at the dis-
play.
Display
Depending on the selected menu, the following appears at the
display panel:
• Setup for test instrument settings
• The selected measuring function or standard
• Measured values with abbreviations and units of measure
• Setting parameters such as type of connection and measure-
ment type
• Icons for softkey operation
• Wiring diagrams, notes regarding the test sequence
and error messages
Display for measurements:
Green progress bars appear in the header for single measure-
ments, and orange progress bars appear for test sequences.
If the upper range limit is exceeded, the upper limit value is dis-
played and is preceded by the “>” symbol (greater than), which
indicates measurement value overrun. Falling short of the lower
range limit is indicated by the “<” symbol (less than), e.g. for RINS.
Display for connected devices:
Devices connected to the two USB master ports such as key-
board, barcode/RFID reader, printer or USB flash drive appear as
icons in the display’s header.
For reasons of clarity, only one icon is displayed when several
devices of the same type are connected. A small number also
appears in the icon indicating the number of these devices.
Variant with Touchscreen
Depending on the selected order features, your test instrument
may be equipped with a touchscreen.
Operate the display with your fingers only. Never operate the
touchscreen with hard or pointed objects such as a test probe or
a ballpoint pen, because this may cause damage to the display.
7.2 Entering Text and Numbers
A softkey keyboard is displayed for entering text, numbers and characters (e.g. for entering an offset, a test object ID number, type
designations, comments etc.), which is operated by means of the softkeys. In the case of test instruments with touchscreen (feature
E01), entry is more convenient via the touchscreen keyboard.
Alternatively, entries can also be made with the help of a USB keyboard which is connected to the instrument.
Overview: Entry via Softkey Keyboard
Overview of Entries via the Touchscreen Keyboard (feature E01)
PRINT Print via USB
ESC Back
HELP Help images
MEM Database
START
STOP
Start/stop
– Single measurement
– Test sequence
Finger contact
Delete chars. from right
Switch between upper/
Scroll left
Accept entry
lowercase, and symbols
Switch between
Scroll down
Transfer char. at cursor
Exit entry function
Scroll right
Display Panel
Keypad
position to display panel
without saving
Scroll up
keys and display panel PRINT
ESC
HELP
MEM
Accept entry *
Display Panel
Keypad
Delete characters from right *
* Also via assigned softkey
➭Briefly pressing the shift key
once causes the next char-
acter to appear in uppercase.
➭Pressing the shift key for a
longer period of time causes
all following characters to
appear in uppercase.
➭The cursor can be positioned
as desired by pressing the
display panel at the respec-
tive point in the existing text.

Gossen Metrawatt GmbH 17
Example: Entering a Designation for a DUT
1 Switch the keyboard to uppercase, lowercase or special char-
acters with the abc key (Abc, ABC, Symb).
2 Select the desired alphanumeric character or a line break with
the scroll keys (left, right, up and down). The selection cursor
can be accelerated by pressing and holding the respective
scroll key.
3 After pressing the key, the respective character appears
at the display panel.
4 Repeat steps 1 through 3 until the complete designation
appears at the display panel.
5 The designation at the display panel can be changed subse-
quently by hiding the bottom keyboard by pressing the
key. The cursor position can then be changed in order to
delete individual characters.
6 The value appears at the display after pressing the
green checkmark.
7.3 Entry via External USB Keyboard
Instead of using the touchscreen keyboard, characters can be
entered directly with a USB keyboard which is connected to the
test instrument. See “Connecting and Configuring External
Devices” on page 25.
Note
In order to use a USB keyboard at the test Instrument,
the “Keyboard Layout” settings in Setup must coincide
with the connected keyboard.
Additional Key Functions, DB Comfort Option
(only with SECUTEST DB COMFORT – Z853S or feature KD01)
If feature KD01 has been enabled, which is available for a fee, the
following additional entry options are available via and external
keyboard:
Print PRINT
ESC ESC
F1  HELP
F2  MEM
F5 Softkey 1
F6 Softkey 2
F7 Softkey 3
F8 Softkey 4
F9 Softkey 5
F3 Search for test object ID in the database (only in MEM
database management, at the primary level of auto
measurement screens and in green measurement
screens)
F4 Search for “Text” in the database (only in MEM data-
base management, at the primary level of auto mea-
surement screens and in green measurement screens)
Additional key functions within MEM database management:
Cursor Navigation within the tree
Home Jump to database root node
End Jump to end of tree
Tab Switch between location/customer tree
Insert Create new object
Delete Delete object
(enter)For editable objects: edit object,
for measurements: test list view
+InsertMove object within tree
(simultaneously press the shift and insert keys)
In the event that several objects have been found as the result of
the search:
  Scroll through found objects
(right and left scroll keys)
Additional Key Functions in the Test List View
(when the test report is shown at the display):
  scroll (up and down scroll keys)
  Switch to detail view or back to list of tests steps (right
and left scroll keys)
Tab Select filter type for test steps
(abridged / failed test steps only / all)
(Enter) Exit test list view
7.4 Help Functions (HELP key)
Depending on the rotary selector switch position and the selected
measurement type, appropriate wiring diagrams are displayed.
➭Press the HELP key in order to query online help.
➭Press the ESC key in order to exit online help.

18 Gossen Metrawatt GmbH
8 Test Instrument Settings
After initial startup (see section 6), basic system parameters must first be configured (see section 8.1). Then you’ll need
to decide which standard designations will be used for the integrated, preconfigured test sequences and, if necessary,
change the assignment of test sequences to rotary switch positions (see section 8.2).
Depending on the selected model, the test instrument is equipped with a Bluetooth®interface which has to be configured.
8.1 System Parameters
Basic system parameters must first be set, for which descriptions are included below.
Setup 1/3 > System 1/2 > Culture > Language
Setup 1/3 > System 1/2 > Culture > Keyboard Layout
Setup 1/3 > System 1/2 > Date/Time (for report generation)
Setup 1/3 > System 2/2 > Brightness (display brightness as %)
SETUP Menu Overview
Figure 2 Test Instrument Settings, Main Menu Level – Rotary Switch in SETUP Position
Attention!
The standard designation cannot be changed retroactively! Stored measurements retain the standard des-
ignation and it’s used in the test report.
For this reason, select the standard designation carefully during initial startup.
As soon as the standard designation has been changed, the new designation is used in all future tests.
SETUP
!
Display additional menu pages
Menu selection, operating parameters, page 1 of 3
Clear database or display statistics,
Display additional menu pages
Menu selection, operating parameters, page 2 of 3
Display additional menu pages
Menu selection, operating parameters, page 3 of 3
Setup 1/3
Setup 2/3
Setup 3/3
Save only appears if a USB drive is plugged in.
Set test sequence parameters: amongst others measur-
ing sequences (standard) (see section 8.2)
Parameters for single measurements and test
sequences (see section 6.1.1 and section 13.3)
Menus for using the Bluetooth®interface
(see section 8.3) only with feature M01
For selecting and setting up the printer submenu
(see page 27)
Query software/hardware version, serial no., calibration
dates, memory occupancy, user’s manual *
* QR code with link to operating instructions on the web
Enter, edit or protect inspector with password,
assign roles (see page 29)
Set date/time, language, brightness etc.
(see submenu on following page)
Layout test reports, e.g. with logo, location,
signature, details
Only with database extension or feature KB01:
manage and import own sequences
Select and configure barcode reader by scanning
the displayed barcode
Softkeys are keys with functions that vary
depending upon the menu level.
Function Keys
PRINT
ESC
HELP
MEM
PRINT
ESC
HELP
MEM
PRINT
ESC
HELP
MEM

Gossen Metrawatt GmbH 19
Set language, keyboard layout, time, date and brightness
Figure 3 Test Instrument Settings, Submenu Level – Rotary Switch in SETUP Position
Setup 2/3 > System 1/2 > Culture
Select user interface language including date
format and decimal separator *
Reset to default values
Caution: All of the settings in the setup menu
are deleted! Also deletes the inspector list,
the content of the database and the com-
pany logo
.
Date and time setting menu
(see settings menu below)
Culture settings menu
(see settings menu below)
To System 2/2
Enable extensions (enabling functions/feature)
(see section 9)
Setup 1/3 > System 1/2 Menu selection for language and date
Manual selection for language and keyboard layout
Info: Date format, decimal separator *
Jump back to next higher menu level
Country-specific keyboard layout for USB or on-
screen keyboard
Set time and date menu
Move cursor left
Move cursor right
Accept changes and jump back
Decrease number
Increase number
Setup 1/3 > System 1/2 > Date / Time
Setup 1/3 > System 2/2
Menu for setting LCD brightness
To System 1/2
Volume setting menu
Self-test for display and buzzer
Calibrate touchscreen keyboard – only with SE-
CUTEST ST PRO or feature E01
Menu selections for brightness, volume, touch
and self-test
Softkeys are keys with functions that vary
depending upon the menu level.
Function Keys
PRINT
ESC
HELP
MEM
PRINT
ESC
HELP
MEM
PRINT
ESC
HELP
MEM
PRINT
ESC
HELP
MEM

20 Gossen Metrawatt GmbH
Attention!
!
If you change the keyboard layout setting later and
you’re already using a barcode reader, you’ll have to set
the barcode reader to the new keyboard layout via Setup
3/3 > Barcode Reader > Type Z751A. The barcode
reader must also be accordingly configured. Please refer
to the device documentation for further information.
8.2 Test Standards / Configuration of Integrated Test
Sequences
Test sequences in accordance with the standards (also called
measurement or test sequences) are preconfigured and inte-
grated into the test instrument. They consist of a series of single
tests with subsequent documentation, as stipulated in the
respective standard. They can thus be used to repeatedly and
efficiently perform standards-compliant tests. Detailed information
and a description of the procedure can be found in section 17
“Test Sequences (automatic test sequences)”.
In order to use the integrated test sequences, they have to be
prepared during initial startup:
The integrated test sequences are identical in terms of content,
but they have different national designations depending on the
respective country (DIN, VDE, ÖNORM, SNR etc.). Furthermore,
there are variants for each integrated test sequence, e.g. for test-
ing PRCDs.
This is why a standard designation must first be selected in the
test instrument for the integrated test sequences.
Attention!
!
Selection of the standard designation is mandatory and
must be completed during initial startup.
Standards which are not needed can be deactivated in order to
increase clarity.
The integrated test sequences are run in orange rotary switch
positions A1 through A9. Integrated test sequences are preas-
signed to each rotary switch position at the factory, but these
assignments can be changed. You can assign a different inte-
grated test sequence to a rotary switch position if required, or
leave the preselected, integrated test sequences as they are.
Attention!
!
If you’ve updated your test instrument from firmware
3.2.0 or lower to firmware 3.3.0 or higher, you’ll also
have to configure the test standards.
The same applies if you’ve subsequently purchased and
enabled an extension for additional test sequences.
See “Selecting a Designation and Deactivating Stan-
dards in Case of Update or Extension (enabling function)”
on page 22 in this regard.
8.2.1 Selecting the Standard Designation and Deactivating Stan-
dards
During initial startup, the desired national standard designation
must be selected for each integrated test sequence.
The integrated test sequences are identified with this designation:
• For display at the test instrument
(routine daily work)
• In the test results saved to the test instrument (and when
these results are exported, e.g. to IZYTRONIQ test software)
(data management)
•Inreports
(verification requirement)
Attention!
!
The standard designation cannot be changed retroac-
tively! Stored measurements retain the standard desig-
nation and it’s used in the test report.
For this reason, select the standard designation carefully
during initial startup.
As soon as the standard designation has been changed,
the new designation is used in all future tests.
Standards which are not needed can be deactivated in order to
increase clarity.
The settings can be found under SETUP > Auto Measurements. Each
standard for which a test sequence is integrated is displayed
there.
➭SETUP 1/3 > Auto Measurements.
➭Scroll through the menu pages until the individual standards
appear.
➭Select the first standard via the softkey.
All possible standard designations are displayed.
(An overview of all available standard designations can be
found on the following page).
➭Select the desired standard designation with the correspond-
ing softkey.
Alternatively, the standard (the test sequence) can be deacti-
vated by selecting the off entry.
The menu is returned to the standards display in Auto Measure-
ments.
➭Repeat this procedure for all standards.
➭Finally, confirm with the green checkmark. The settings are
saved.