Beha-Amprobe GT-650 User manual

GT-650/GT-900 User's Manual
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GT-650/GT-900 User's Manual
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GT-650/GT-900
User’s Manual

GT-650/GT-900 User's Manual
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Table of Contents:
Safety information, Warning.....................................................................................6
Introduction ...............................................................................................................7
Scope of Supply .........................................................................................................8
Available Operational Accessories ...........................................................................8
Transport and Storage ..............................................................................................9
Safety Measures ........................................................................................................9
Appropriate Usage ..................................................................................................10
Description of warning marks on the front panel .................................................11
Operation Elements and Connectors .....................................................................12
Front panel of the GT-650 Tester ...........................................................................12
Front panel of the GT-900 Tester ...........................................................................13
Quick instruction card GT-650 Tester, connection diagrams and limit values ......14
Quick instruction card GT-900 Tester, connection diagrams and limit values ......15
Description of PRCD-Adapter .................................................................................16
Preparation of the GT-650/GT-900 Tester ...............................................................17
Turning on the GT-650/GT-900 Tester ....................................................................17
Test lead compensation ..........................................................................................17
Limit value setting ...................................................................................................18
Start of the measurement .......................................................................................18
External Voltage Display .........................................................................................19
Testing Appliances ..................................................................................................19
Visual Inspection ......................................................................................................20
Protective Earth Bond Test 5 A / 0.2 A (RPE) ..........................................................21
Insulation Resistance Test 250 V / 500 V (RINS) .......................................................24
Substitute Leakage Current Test (ISUB) ..................................................................28
Earth Leakage Current Test (IPE()) (differential method) .....................................30
Touch Leakage Current Test (IT) (direct method)...................................................32
Functional test (P/IL), Power and Load Current measurement .............................35
Clamp Current Test ( ) (GT-900 only) ...............................................................37
IEC CORD Test (CORD/PRCD) ...................................................................................39
PRCD Test (CORD/PRCD) (GT-900 only)....................................................................43
Protective Extra Low Voltage Test (PELV) ..............................................................51
Safety Extra Low Voltage Test (SELV) .....................................................................52
AUTO-TEST MODE (GT-900 only).............................................................................53
Menu Mode .............................................................................................................67
MEMORY Menu .......................................................................................................68
CLIENT Menu ...........................................................................................................70
ENGINEER Menu ......................................................................................................71
AUTO-TEST Menu ....................................................................................................72
SETUP Menu ............................................................................................................76
LANGUAGE Menu ...................................................................................................78
CONTRAST Menu .....................................................................................................78
TESTER INFO Menu ..................................................................................................78
Memorizing Example ..............................................................................................79
Recall Data ...............................................................................................................83
Entry of Appliance Code and it’s Attributes by Using an External Keyboard ......85
Entry of Appliance Code and it’s Attributes by Using a Bar Code Reader ...........88
Removable Lid .........................................................................................................89
Maintenance ............................................................................................................89
Cleaning ...................................................................................................................89

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Calibration Interval .................................................................................................89
Fuse Replacement ...................................................................................................90
List of Possible Displayed Errors .............................................................................91
Reset of the GT-650/GT-900 Tester..........................................................................92
Pre-Tests and Protection .........................................................................................94
Technical Specifications GT-650/GT-950..................................................................97
General Features .....................................................................................................97
Functions ..................................................................................................................98
Technical Specifications PRCD-Adapter ................................................................105
General Features ...................................................................................................105
Functions ................................................................................................................105
Variation Factor Errors...........................................................................................106
Limited Warranty and Limitation of Liability ......................................................107
Service ....................................................................................................................107
List of abbreviations ..............................................................................................107

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Safety information, Warning
Measurements of the electrical safety of appliances should only be carried out by
properly trained and competent persons!
Carefully read the safety information before using the appliance tester
GT-650/GT-900.
Symbols used on the instrument or in this user’s manual:
Warning of a potential danger, comply with the user’s manual.
☞Reference, please pay utmost attention.
Earth (ground) terminal
Do not touch, hazardous voltage, risk of electric shock.
Read the user’s manual.
Symbol for marking of electrical and electronic equipment
(WEEE Directive).
Conformity symbol, confirms compliance with the applicable
European directives. The requirements of the EMC Directive and
the Low Voltage Directive with the relevant regulations
Standards are also fulfilled.
WARNING
 The user’s manual contains information and references, necessary for safe
operation and maintenance of the instrument. Prior to using the
instrument, the user is kindly requested to thoroughly read the user’s
manual and comply with it in all sections.
 If the equipment is used in a manner not specified by the manufacturer, the
protection provided by the equipment may be impaired.
 Failure to read the user’s manual or to comply with the warnings and
references contained herein can result in serious bodily injury or instrument
damage.

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Introduction
You have acquired a high-quality measurement instrument manufactured by
BEHA-AMPROBE, which will enable you to perform repeatable measurements for a
very long period of time.
The portable appliance tester GT-650/GT-900 is a measurement instrument for
testing the effectiveness of the protective measures of electrical
equipment/appliances complying with VDE 0701-0702, DIN VDE 0404-1/-2 and EN
61557-1/-2/-4/-10/-16 and documentation of test results.
Available measurements, product description:
 Visual inspection as an independent function.
 Protective earth bond resistance measurement (RPE), test current 0.2 A AC and
5 A AC. The test is carried out on plugged and also on fixed connected
appliances.
 Insulation resistance measurement (RINS), test voltage 500 VDC and 250 VDC
(250V GT-900 only). Appliances PC I, PC I-HEATER (with heater), PC II and PC III
can be tested.
 Substitute leakage current measurement (ISUB), test voltage 45 V AC.
Appliances PC I and PC II can be tested.
 Earth leakage current measurement (IPE()) by differential method.
 Touch leakage current measurement (IT) by direct method with probe
resistance of 1k.
 Functional test (P/IL) including apparent power, active power, mains voltage,
load current and power factor measurement.
 Earth leakage current IPE and load current ILmeasurement ( ) with external
current clamp adapter (GT-900 only).
 IEC CORD test (protective earth bond resistance, insulation resistance, L
continuity, N continuity, L/N shorted).
 Test of portable RCD (PRCD): Standard PRCD, PRCD-S, PRCD-S+ and PRCD-K can
be tested in accordance with producer’s instructions (GT-900 only).
 Protective extra low voltage (PELV) measurement.
 Safety extra low voltage (SELV) measurement.
 AUTO-TEST mode / automatic test sequence (18 factory-programmed AUTO-
TESTS for NON UK region and 16 AUTO-TESTS for UK region, 50 customer-
created AUTO-TESTS) (GT-900 only).
 Fully compatible with “es control” software to create data base of appliances
with their attributes and to create final test certificates. Data base of
appliances can be transferred from “es control” to GT-650/900 tester and
measurement results can be transferred from GT-650/900 tester to “es control”.
 Extremely easy operation using rotary switch and START/STOP button.
 Automatic start function for protective earth bond resistance measurement
allows both-hands measurements on measured objects that are difficult to
access.
 Compensation of test lead resistance for protective earth bond resistance
measurement, CORD and PRCD measurements.
 Calculation of limit values for protective earth bond resistance.
 Automatic mains voltage polarity exchange at earth leakage current and touch
leakage current measurements (GT-900 only).

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 GT-900: Data memory for 10.000 appliance codes and 5.000 measurement
results.
GT-650: Data memory for 1.000 appliance codes and 500 measurement results.
 Integrated interface (USB 2.0) for transfer of measurement results to PC.
 Additional double interface (USB 2.0) for connection of optional USB barcode
reader (HID), USB keyboard (HID) or USB memory stick.
 Graphic LCD for measurement values, limit values and test parameters.
 Compact plastic housing with accessory bag attached to the lid.
 Removable instrument’s lid.
 Connection diagrams and limit values attached to instrument’s lid.
 Limit values adjustable through measurement range in all functions (except P/IL
and CLAMP (range 0 … 60 A)).
 Visual and acoustic warnings in case of exceeded limit value.
 Adjustable acoustic signal intensity.
 Limits predefined for NON UK and UK region.
 Standard and combined mode for barcode reader.
 Real time clock for documentation of test results.
 Single or continuous measurements.
 Adjustable measurement times in single measurement mode and separately in
AUTO-TEST mode.
 Standard and fast mode in AUTO-TEST mode.
 Two selectable languages (English and German)
 Two keyboards supported (English and German)
Scope of Supply
1 pc Portable Appliance Tester GT-650/GT-900 with permanently connected
mains cable (Schuko, except GT-900 CH) and with removable lid
1 pc PRCD-Adapter (GT-900 only)
1 pc PRCD test finger tip (extension) (GT-900 only)
1 pc Test lead, 1.5 m, 600 V CAT IV, black
1 pc Alligator clip 32 A, 1000 V, CAT III, black
1 pc Test tip 4 mm, 36 A, 1000 V CAT II, black
1 pc USB interface cable
1 pc CD with USB drivers and user’s manuals
1 pc User’s manual in English and German
1 pc Accessory bag (fixed to the housing’s lid)
Available Optional Accessories
PC software “es control“ for generating test certificates (No. 2390081)
USB barcode reader (BC-MT204S, No. 3504407)
USB keyboard English version (KBUK-MT204S, No. 3504395)
USB keyboard German version (KBGE-MT204S, No. 3504388)
Current clamp adapter CHB-1 (No. 2390055) measuring range 0.001 A ... 60 A
(for Earth leakage/load current measurements)
Clamp adapter ACF-6A (No. 2743889)
PE socket adapter Adapter-PE (No. 4151659)
Brush test probe PAT-BRUSH (No. 4151667)

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Transport and Storage
Please keep the original packaging for potential later transport, e.g. for
calibration. Any transport damage due to faulty packaging will be excluded from
warranty claims.
Instruments must be stored in dry and closed areas. In case of an instrument being
transported in extreme temperatures, a recovery time of minimum 2 hours is
required prior to instrument operation.
Safety Measures
The GT-650/GT-900 appliance tester has been built and tested in compliance with
the valid safety regulations and left the factory in safe and perfect condition. In
order to maintain this condition and to ensure safe instrument operation, the user
must pay attention to the references and warnings contained within this user’s
manual.
WARNING, DANGER OF ELECTRICAL SHOCK
 In order to avoid electrical shock, the valid safety and national regulations
regarding excessive contact voltages must receive utmost attention when
working with voltages exceeding 120V DC or 50V RMS AC.
 The respective accident prevention regulations established by the national
health & safety board for electrical systems and equipment must be strictly met
at all times.
 Prior to any operation, ensure that the instrument, test leads, mains cable and
accessories are in perfect condition.
 The instrument may only be connected to mains voltage as indicated in the
technical specification section.
 The instrument must obligatory be connected to and supplied by properly
wired mains socket (PE connector must be earthed) prior to connecting any test
lead to test socket PROBE 1 or PROBE 2 and/or prior to connecting any DUT
(Cord or PRCD) to IEC test connector! This is to assure the instrument to be
grounded before any further use, otherwise the situation may be hazardous!
 The instrument may only be used within the operating ranges as specified in
the technical specification section.
 Only touch test leads and test probes at hand-held area behind the protective
fingerguard. Never directly touch test probes. Direct contact to measurement
connectors or test probes must be avoided at any time.
 The instrument may only be used in dry and clean environments. Dirt and
humidity reduce insulation resistance and may lead to electrical shocks, in
particular for high voltages.
 Never use the instrument in precipitation such as dew or rain. In case of
condensation due to temperature jumps, the instrument may not be used.
 A perfect display of measurement values may only be ensured within the
temperature range of 0 °C to +40 °C.
 Prior to opening the instrument ensure that it is switched off and disconnected
from all current circuits.
 To ensure a safe measurement only use original test leads and accessories.

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 If the operator’s safety is no longer guaranteed, the instrument is to be put out
of service and protected against use. The safety can no longer be guaranteed if
the instrument (or test leads):
– shows obvious damage
– does not carry out the desired measurements
– has been stored for too long under unfavourable conditions
– has been subjected to mechanical stress during transport.
 Dangerous voltages may be present on appliances/devices under test (DUT)
caused by defective insulation. Do not touch the appliance/device under test,
danger of electrical shock!
 Start any test series by visual inspection and protective earth bond resistance
measurement.
 For protective earth bond resistance test, insulation test and substitute leakage
test, appliance/device under test must be voltage-free (mains supply). If
necessary, check the appliance/device if it is voltage-free i.e. by using a two
pole tester acc. to IEC/EN 61243-3.
 Accidental measurement of a defective appliance/device may trip an RCD
(residual current device) of supply.
 During the earth leakage current test, the touch leakage current test and the
function (load) test, the DUT will be energized at mains voltage. DUT driven by
motors or equipped with heating elements may present a danger for the
person testing or others (Comply with the user’s manual of the DUT!). Please
ensure that the DUT is in a safe condition to run and secure prior to testing.
Appropriate Usage
WARNING
 The instrument may only be used under conditions and for the purposes for
which it was conceived. For this reason, and particular the safety references,
the technical data including environmental conditions and the usage in dry
environments must be followed.
 When modifying the instrument, the operational safety is no longer ensured.
 The instrument may only be open by an authorised service technician. Before
opening the instrument must be switched off and disconnected from any
electrical circuit.

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Description of warning marks on the front panel
Figure 1: Explanation of safety and
measurement category (CAT) rating of
input / output terminals
Warning 4:
230 V CAT II is max. allowed voltage between PROBE 2 and earth in function
Touch Leakage Current (IT). While this measurement the DUT must be powered
from mains socket of GT-650/GT-900 tester and it is allowed only to connect PROBE
2 to touchable parts of the DUT.
100 V is max. allowed voltage between PROBE 2 and earth in functions Protective
Extra Low Voltage (PELV) and Safety Extra Low Voltage (SELV).
Do not apply any external voltage to PROBE 2 in any other function.
100 V max. is allowed voltage between PROBE 1 and PROBE 2.
Warning 5:
Use this socket for test purpose only!
Do not feed in any external voltage (touchable conductive parts of the tester may
not be earthed, if GT-650/GT-900 is not powered with mains)!
This socket is allowed to be supplied from GT-650/GT-900 test / mains socket
(schuko socket) only while performing measurements on CORD or PRCD (while
performing the measurements GT-650/GT-900 is powered with mains supply and
touchable conductive parts of the tester are earthed in this case)!
Warning 1:
Use this test socket for CLAMP
connection only! Use the clamp listed
in chapter “Scope of Supply” on
page 8 only!
Input: Max. 60 mA / max. 0.5 V!
Note! One terminal is earthed!
Warning 2:
Use this test / mains socket for test
purpose only!
Output: CAT II 300 V !
IPE, ITand POWER measurements:
Intermittent use!
Max. 4 minutes measurement
duration / 3 minutes pause!
Warning 3:
100 V is max. allowed voltage
between PROBE 1 and earth !
100 V is max. allowed voltage
between PROBE 1 and PROBE 2.
RPE 5A measurement: Intermittent use!
Max. 2 minutes measurement
duration / 3 minutes pause!

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Operation Elements and Connectors
Front panel of the GT-650 Tester
Figure 2: Operational elements and connectors on GT-650 tester
1 ...... Mains input fuse F1 T16 A (H) / 250 V, 5 × 20 mm
2 ...... Mains input fuse F2 T16 A (H) / 250 V, 5 × 20 mm
3 ...... Menu keys F1 ... F4
4 ...... ON/OFF mains switch with red pilot lamp
5 ...... Function keys F5 ... F8, SAVE (to save test result), RCL (to recall saved test
result), MENU (to use menu functions) and EXIT (to exit current menu level)
6 ...... Rotary switch to select measurement function
7 ...... START/STOP button (to start or stop selected measurement function)
8 ...... ON red pilot lamp, measurement active
9 ...... Test / mains socket
10 .... Fuse for RPE function F3 FF6.3 A (H) / 250 V, 5 × 20 mm
12 .... Green test socket (PROBE 1)
13 .... Red test socket (PROBE 2)
14 .... IEC test connector (for CORD test)
15 .... USB2 and USB3 interface for USB barcode reader, USB keyboard or USB
memory stick
16 .... USB1 interface for connection to PC
17 .... Graphic LCD for measurement values, limit values and parameters.

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Front panel of the GT-900 Tester
Figure 3: Operational elements and connectors on GT-900 tester
1 ...... Mains input fuse F1 T16 A (H) / 250 V, 5 × 20 mm
2 ...... Mains input fuse F2 T16 A (H) / 250 V, 5 × 20 mm
3 ...... Menu keys F1 ... F4
4 ...... ON/OFF mains switch with red pilot lamp
5 ...... Function keys F5 ... F8, SAVE (to save test result), RCL (to recall saved test
result), MENU (to use menu functions) and EXIT (to exit current menu level)
6 ...... Rotary switch to select measurement function
7 ...... START/STOP button (to start or stop selected measurement function)
8 ...... ON red pilot lamp, measurement active
9 ...... Test / mains socket
10 .... Fuse for RPE function F3 FF6.3 A (H) / 250 V, 5 × 20 mm
11 .... CLAMP input connector
12 .... Green test socket (PROBE 1)
13 .... Red test socket (PROBE 2)
14 .... IEC test connector (for CORD test and PRCD test)
15 .... USB2 and USB3 interface for USB barcode reader, USB keyboard or USB
memory stick
16 .... USB1 interface for connection to PC
17 .... Graphic LCD for measurement values, limit values and parameters.

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Quick instruction card GT-650 Tester, connection diagrams and limit values
Figure 4: Brief instructions with limit values (GT-650 tester)

GT-650/GT-900 User's Manual
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Quick instruction card GT-900 Tester, connection diagrams and limit values
Figure 5: Brief instructions with limit values (GT-900)
Measurement accessories are stored in the accessory bag on the top of the tester.

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Description of PRCD-Adapter
The PRCD-Adapter is intended to be used in combination with GT-900 tester only,
for testing all types of PRCDs in accordance with PRCD producer’s test instructions.
View:
Figure 6: View with control elements, connectors and marking of measurement
category (CAT)
1 ...... UPE button, to apply external voltage to input PE terminal of PRCD device
under test, as long as the button is pressed.
2 ...... Control neon lamp. It is ON when UPE button is pressed or when Probe 3
sufficiently touches ON button of the PRCD under test.
3 ...... Warning sign: Do not touch Probe 3, hazardous voltage may be applied to
it.
4 ...... Test socket “Probe 3” is an output, used to apply external voltage to ON
button of the PRCD under test.
5 ...... Warning sign: Output Probe 3, external voltage CAT II 300 V max. against
Earth !
6 ...... Test socket “to Probe 1”, to be connected to Probe 1 of GT-900 tester when
testing PRCD-K devices.
7 ...... Warning sign: Output Probe 1, external voltage 30 V max. against earth !
8 ...... Warning sign: Use this test / mains socket for test purpose only!
9 ...... Schuko socket, to connect PRCD under test.
10 .... Schuko plug, to be connected to GT-900 tester.

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Preparation of the GT-650/GT-900 Tester
Turning on the GT-650/GT-900 tester
1) Connect the GT-650/GT-900 tester to a correctly installed Schuko mains
socket.
2) Use the mains switch “ON/OFF“ (4) to turn on the GT-650/GT-900 tester.
3) After turning on the GT-650/GT-900 tester, pilot lamp of the power switch
(4) will switch on and the display (17) will show idle readout of selected
function. The GT-650/GT-900 tester is now ready for use.
Test lead compensation
The GT-650/GT-900 tester leaves the factory with uncompensated test lead in RPE
function and uncompensated test adapter in CORD/PRCD function. We recommend
to compensate test lead/adapter before starting the RPE, CORD or PRCD tests,
otherwise result may not be correct There are two compensations available (two
independent compensation values).
 Compensation of test lead when carrying out RPE measurements (single
measurements or AUTO-TESTS). Warning note “TEST LEAD NOT
COMPENSATED” will be displayed for a moment after pressing the “START”
key as long no test lead is compensated or compensation value was deleted.
 Compensation of test adapter when carrying out CORD measurements (CORD
on reel only) or PRCD measurements (single measurements or AUTO-TESTS).
Take care when test adapter is to be compensated, there will be no warning if
test adapter is not compensated.
Procedure for compensation in RPE measurements:
1) Set the measurement function selector (6) to RPE position.
2) Connect test lead, which will be used later on to perform the RPE
measurement, according to the figure below.
3) Press the “COMP” menu key (F2), then start the measurement by pressing
the “START” button (7). Pilot lamp “ON” (8) indicates the active
measurement, then the result using uncompensated test lead is displayed
for a moment. Another regular measurement is done automatically using
compensated test lead, now the result should be nearly zero. In the upper
display line the character “C“ (compensated) appears as the information
that test lead is compensated.
Figure 7: Connection for test lead compensation

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☞ This compensation will be used in all further single or AUTO-TEST RPE
measurements. It will be active even after switching off and on the GT-
650/GT-900 tester.
☞ CORD and PRCD functions are using their own compensation (the same
for both functions) independent from above described one. See the
information on how to compensate/uncompensated test adapter in
chapters “IEC CORD Test (CORD/PRCD)“ starting on page 39 and “PRCD
Test (CORD/PRCD) (GT-900 only)” starting on page 43”.
☞ Whenever test lead or adapter is changed, the compensation has to be
redone. Wrong compensation will direct influence the test result and may
give wrong judgement for limit.
☞ Compensation is always carried out using test current of 5 A, while second
measurement (self-test) is using selected test current (0.2 or 5.0 A).
How to cancel actual test lead compensation:
Open test loop (disconnect test lead from terminal PROBE 2) and carry out the
compensation as described above. The result >11.00will be displayed and “C”
symbol will disappear from the top display line.
Limit value setting
Limit value is offered in all functions except in P/ILand CLAMP (range 0 … 60 A).
For limit value setting press the “LIM” (or “PAR”, see explanation in each function
separately) menu key, then use the menu keys “+”, “–“, “STD” (Standard) or
“CALC” (Calculation). The menu key F8 “EXIT” can be used to exit limit value
setting display.
☞ In case test result comply with set limit value, the symbol “ ” is displayed and
two short sound signals are present after finishing the measurement. In case
of non-compliance, the symbol “X” is displayed and one longer sound signal is
present after finishing the measurement (see the details in chapter
“ACOUSTIC SIGNAL” on page 77). The limit value is saved as a parameter of
the measurement result and is transferred to PC in case of data transfer.
Start of the measurement
 For single measurement press the START key and release it. In this case
measurement time is defined in MENU / SETUP / MEASUREMENT TIMES menu,
see the chapter “SETUP menu” on page 76. Watch elapsed time on displayed bar
graph during the measurement.
 For continuous measurements press and keep pressing the START key for at least
2 seconds until “CONT” (continuous) information is displayed. Measurement
time is limited to 5 minutes maximum in this case. Continuous measurement is
available in all functions except in CORD, PRCD and AUTO-TESTS.

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External Voltage Display
 If there is a dangerous external voltage present on test terminals prior to a test
or during it, the warning message “EXTERNAL VOLTAGE!“ will appear on the
display and the start of the measurement will be blocked. Remove the external
voltage!
 If an external voltage is applied to test terminals during the test in RINS function,
wrong measurement values may be displayed.
Testing Appliances
WARNINGS
 Before starting the tests, you must familiarize yourself with the DIN VDE 0701-
0702 "Testing after repairs, alteration of electrical equipment - re-testing of
electrical devices".
 Before commencing the tests, you are strongly advised to make reference to the
local regulations and standards for safety at works regulations and any relevant
publications from the Health and Safety Executive.
 The DUT (Device Under Test = Appliance) must be switched on for all tests
(mains switch must be turned ON even if the DUT is disconnected from mains
voltage e.g. in RPE, RINS and ISUB tests).
 When conducting tests do not touch the DUT as some tests involve higher
voltages and higher currents.
 Do not touch the test specimen during the measurements, as a high risk may
arise in the case of faulty test specimens.
 The tests should only be performed by competent persons who are familiar with
the requirements of the type of tests suitable for portable appliances.
 It is potentially hazardous for both, user and the DUT if the wrong type of tests
be undertaken or if testing is carried out in an incorrect sequence.
 It is important that you fully understand the various tests required and how they
should be performed.
 The appliance must have passed the visual inspection, the protective earth bond
resistance test (PC I appliances) and the insulation test (in this sequence) prior to
any other test. If any of these tests fail further testing must be stopped and any
faults must be fixed.
 During the earth leakage current test (IPE()), the touch leakage current test (IT)
and the function test (load power/current (P/IL)), the DUT will be energized at
mains voltage. For this purpose, switch on the DUT. DUT driven by motors or
equipped with heating elements may present a danger for the person testing or
others (comply with the user’s manual of the DUT!). Please ensure that the DUT
is in a safe condition to run and secure prior to testing.
Please remove external voltage from any test terminal
immediately if “EXTERNAL VOLTAGE!” warning is displayed.

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Visual Inspection
Visually inspect the appliance before starting electrical tests.
Check the appliance for the following:
 Condition of the appliance cables, i.e. no cuts, cracks or any physical damage to
the outer insulation layer.
 Condition of the plug, cable securely attached, strain relief, bend protection.
 No signs of damage or overheating.
 Fuses are correctly fitted, rated and acc. specification.
 Any signs of damage, and that any mains or control switches will physically
switch on and off.
 Any signs of overheating or physical damage.
Display explanation:
Figure 8: Display in visual inspection function (example)
1 ...... “OK” menu key for confirmation of successful visual inspection.
2 ...... “n. OK” (not OK) menu key for confirmation of unsuccessful visual
inspection.
3 ...... Test result ( ... result OK, X ... result not OK).
 In order to save displayed test result, see the “Memorizing example” section.