Wavecom TnT RCD User manual

Wavecom
User Manual
+ Certificate of Warranty and Product Support Information
TnT RCD
Portable Appliance Tester

Product Support
Safety Information
Important Calibration Information
At Wavecom we take great pride in our customer service and support. We provide assistance,
troubleshooting and support over the phone, via Skype or Facetime, via email or in person to help
you get the most from your Wavecom Portable Appliance Tester. To be eligible for our support
services you must register your product.
You can register via the WinPATS App (this is done automatically during the setup process), or
online at:
https://www.wavecom.com.au/wcm_product_registration.php
The TnT RCD has been designed to meet stringent safety requirements, however no device can
completely protect you from the consequences of incorrect use. The testing of electrical appliances
requires that extra care and caution is taken at all times to ensure personal safety.
The Manufacturer also advises that appliance testing should be conducted by a Competent Person
who is suitably trained (see P.5 AS/NZ 3760:2010 for the definition of Competent Person), as well as
any additional legislation or rulings in different states. If in doubt, the manufacturer suggests the
user contact their responsible authority.
For maximum safety, always ensure that the following advice is followed:
• The equipment being tested is in good condition and passes a visual check.
• All instructions are read, understood and followed.
• The power supply connections are always checked - if the N-E (middle) LED Indicator flashes
red, do not proceed before consulting the manual.
• Always use specified fuses and protection devices.
• Do not use leads that require repair or are damaged.
• If you are unsure, call a licensed Engineer/Electrician.
Your Wavecom Appliance Tester should be calibrated every 12 months. A correctly calibrated
tester is essential for ensuring testing accuracy is maintained, and for complying with the AS/NZS
3760:2010.
To book your tester in for calibration, go to:
https://www.wavecom.com.au/calibration_services.php
Then, send your tester to your nearest calibration service centre:
For Western Australian customers:
Wavecom WA Calibrations
Unit 2/17 Casino Street,
Welshpool, WA 6016
For all other customers:
Wavecom Calibrations
257 Grange Road,
Findon, SA 5023
WavecomCertificate
of Warranty
Your Wavecom Appliance Tester comes with a
conditional 24 month warranty.
Your warranty applies for 12 months from the date of purchase, and will
be extended an additional 12 months if your Tester is calibrated within 12
months of the date of purchase (see rear cover of this manual).
The Manufacturer (Wavecom Instruments Pty. Ltd.) warrants its products against defects in materials and
workmanship for a period of 12 months from the date of purchase. During the warranty period, the Manufacturer
will repair (or at its option replace at no charge) the product that proves to be defective. This warranty does not
apply if the product has been damaged by accident, abuse, misuse or mis-application or as a result of service
or modification by anyone other than the Manufacturer of this tester.
The TnT & TnP Product Range of devices or its Manufacturer is not responsible for incidental or consequential
damages resulting from the breach of any express or implied warranty, including damage to property and to the
extent permitted by law, damages for personal injury. The distributors of this product cannot assume liability
or responsibility for any loss of damage resulting from the use of this device.
The Manufacturer reserves the right to discontinue models, change specifications, price or designs at any time
without notice or obligation.

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Important Information
Contents
TnT RCD Diagrams
Tester Diagram
Rear Panel of Tester Diagram
Important Information 5
Contents 5
TnT RCD Diagrams 6
Precautions 6
Operating the TnT RCD 8
Powering on the Tester 8
LED Indicators 8
TnT RCD Testing Menu – Main Menu A 9
TnT RCD Testing Menu – Main Menu B 11
Meter Mode ® [Not available in Battery Mode] 16
Specifications 17
Technical Information 18
Visual Inspection 18
Class 1 (Earthed Appliance) Construction 18
Class 2 (Double Insulated) Construction 19
Testing of Electrical Equipment 19
Leakage Test 20
Earth Continuity Test 20
Integrated Tests 20
No Connection No Test 21
Wavecom Tags 22
Tester Serial, WinPATS Coupon Code
& Purchase Information Rear Cover
• TnT RCD Portable Appliance Tester
• IEC Test Lead (500mm Orange)
• USB A to USB B Interface Cable
• Earth Lead with Alligator Clips (1800mm Black)
• IEC Power Cable (10A units)
• IEC 20/10 Power Cable with Circuit Breaker (20A Units)
• 24 Month Conditional Warranty
• Manufacturer’s 1st Calibration Certificate (Valid for 12 months
from purchase)
• User Manual
• Quick Start Guide
• Welcome Letter
Function Buttons
Indicator LEDs
Appliance Test Socket
Enter Button
Power Switch
Battery Indicator
IEC Test Socket
LCD Screen
Power Button
PS/2 Port (Manufacturer Use Only)
IEC Charging Port
10A Fuse Location Circuit Breaker
Isolation Switch

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Precautions
Using the Lithium Ion Battery
Using the TnT RCD on Mains Power
To use the TnT RCD on mains power, simply plug in the supplied power cable and connect it to a mains power
outlet. Your TnT RCD will automatically connect to mains power and begin charging the battery.
Using the TnT RCD on Battery Power
When unit is not connected to mains, simply press and hold the power button at the rear of the tester till unit
you hear a beep and the LCD screen turns on. Use the same button to turn off the unit when in battery mode.
Mains Supply tests, Leakage tests and Meter Mode functions are not available on battery power. To perform
RCD Tests, the TnT RCD is required to be connected to mains power.
Important: Ensure that the battery isolation switch is ON while operating the unit & performing tests. The
isolation switch is located on the rear of the tester.
To Charge the Battery
Internal lithium-ion battery (98Wh, 6700mAh) can power the TnT RCD for around 3000 sets of tests. The battery
is charged simply by plugging the TnT RCD into mains power, and it takes around four hours to fully charge.
Note: Turning off the Isolation Switch (located on the rear of the tester) isolates the battery completely and prevents the
battery from charging.
While the TnT RCD is charging and not in use, the display can be turned off by pressing and holding the ENTER
button until you hear a beep and the LCD screen backlight turns off. You will then see charging information
displayed on the screen. Once the battery is fully charged and it is still connected to mains, battery symbol will
convert to plug symbol. It is advised not to put unit to charge when it is unattended or overnight.
Transporting Lithium Ion Battery Products
It has come to the attention of Wavecom Instruments Pty Ltd, that products containing batteries are being
shipped by customers through air freight. It is our understanding that, for the purpose of air transport,
lithium ion batteries are considered dangerous goods under the International Air Transport Authority (IATA)
regulations. It is the responsibility of the shipper to ensure that the product being shipped and the packaging
used comply with all regulations, noting that extensive penalties can be imposed by the relevant authorities
for any breach.
The IATA and other laws and regulations covering the transport of goods are very comprehensive, and Wavecom
Instruments makes no warranty that these regulations will permit particular shipments of its products by air
freight. Lithium ion batteries are not allowed to be transported by air. Products that contain internal batteries
are allowed, as long as the batteries are not damaged.
Should you require further information on the relevant regulations and requirements, please contact your
dangerous goods adviser and/or review the IATA website:
www.iata.org/publications/dgr/Pages/index.aspx
This is not intended to constitute legal advice, and you should obtain your own professional advice. Please
contact Wavecom Instruments Pty Ltd for more information.
Competent Person
To ensure that all electrical equipment or devices are inspected, tested and tagged correctly, regulations
require that a ‘competent person’ such as a Licensed Electrician be employed to perform the required tests.
Please refer to the above definition as described in the current AS/NZ-3760:2010 Standard and in addition, to
any other local legislation or jurisdictions as may be relevant in your State.
A person competent to undertake Inspection and Testing of electrical equipment must have:
• Knowledge and practical experience of electricity and its hazards.
• A clear understanding of precautions to avoid danger.
• The ability to recognise at all times whether or not it is safe for work to continue.
• The ability to carry out visual examinations of electrical equipment.
• The ability to distinguish between electrical equipment that is double insulated and equipment that is
earthed as well as being able to identify the appropriate test for each type.
• The competency to safely carry out the Earthing Continuity, Insulation Resistance or Leakage Test and RCD
tests on electrical equipment.
• The knowledge of how to use the relevant testing instruments, interpret and record the results for
compliance with the Standard/Workplace requirements.
• The knowledge to be able to correctly recommend the frequency of testing required.
Due to the potential hazards of electrical testing, due care must be taken at all times.
Warnings
Operating Environment: Charging – 0° to ~45°C; Discharging -20°to ~ 60°C.
Please ensure the unit is stored in compliance with the operating environment requirements and in a safe and
secure location.
When sending the TnT RCD for calibration, please turn off the battery isolation switch which is located on the
rear panel of the tester. If you have any questions about the battery of your TnT RCD please contact Wavecom
for further advice.
Replacing Fuses
From time to time an appliance may cause an internal fuse within your TnT RCD to break. When this occurs you
will need to replace the fuse. If you prefer you can return your tester to Wavecom and we can replace the fuse
for you, or if you wish you may replace the fuse.
The fuse is located next to the IEC power socket on the rear panel of the tester. To replace the fuse, first
remove the power cable if it is attached. Then, gently lever the fuse compartment open with a small flathead
screwdriver or similar tool. You may have a replacement fuse located in the fuse compartment (above the
blown fuse) - if so, simply replace the blown fuse with this fuse. If you require a new fuse, you must only use
10A M205 Fast Blow fuses, available from Wavecom. Once the fuse has been replaced, gently push the fuse
compartment back into place.

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Operating your TnT RCD
Powering on the Tester
To use your TnT RCD, ensure the isolation switch (located on the rear of the tester) is switched ON. We
recommend that the TnT RCD is fully charged before the first use.
Your TnT RCD will be powered on automatically when you connect it to mains power. To power on your TnT RCD
in battery mode, press and hold the rear power button until the unit beeps and the LCD screen turns on.
LED Indicators
Indicator LEDs
The indicator LEDs are used to display various statuses and results. Use the table below for reference.
TnT RCD is running on battery power.
When the test socket is live during a test, the LEDs will flash white.
TnT RCD is running on mains power, and is charging, no Bluetooth connection. LEDs
will flash yellow during tests.
TnT RCD is fully charged, no Bluetooth connection
When an appliance fails a test, the Indicator LEDs will turn red while the test
results are on screen
When an appliance passes a test, the Indicator LEDs will turn green while the test
results are on screen
If there is a fault with the mains power connection, you may see one (or more) of the Indicator LEDs turn
red. This may indicate a serious issue with the mains power supply - consult a qualified professional before
proceeding. This won’t apply when using battery power.
Standard Mains Supply Test result with no issues.
N-E Fault - If the N-E light in on, DO NOT PROCEED. The N-E LED will turn red if there
is a voltage difference between the neutral and earth, or if no earth is connected.
If you are working from a generator or inverter this is likely to occur and you may
need to consult a qualified electrician before proceeding.
If the N-E LED is red, and A-N is green, there is a fault with the Mains Supply
You may also see more than one, or all of these turn red. For more information, see Mains Supply Test (Page 25)
Battery LEDs
The battery LED indicators display how much charge is remaining in your TnT RCD. Use the table below for
reference.
100% - Battery is fully charged
80%
60%
40%
20% (LED 2 will be flashing)
0% (LED 1 will be flashing)
TnT RCD Testing Menu – Main Menu A
Class 1 - Earthed Appliance Test - Menu A - F1
The Class 1 Test completes the following sequences as part of its procedure:
• Integrated Supply Mains Test - Refer to Integrated Test section
• Integrated NCNT Test - Refer to Integrated Test section
• Earth Bond Test (@ 200mA): 200mA test current, pass level less than 1Ω
• Insulation Test (@ 250V or 500V): pass level greater than 1MΩ
Note: 250V insulation testing applies to Class 1 appliances if selected (refer to Technical Information for details to change
test voltage).
In some situations, if the DUT is labelled with “Surge Protection Fitted” or if it contains MOV’s (Metal Oxide
Varistors), conduct a 250V-insulation test. If unsure refer to the AS/NZS:3760 Standard. Should it still fail,
remove it from service. (Refer to the Technical Information section to change test voltage).
Note: Ensure that the device is isolated from any ground loop.
Procedure:
1. Complete a Visual Inspection.
2. Plug device into appliance test socket.
3. Plug the IEC Clamp Cable into the IEC socket of the TnT RCD
4. Connect earth clip to any exposed metal on the device. If this is not possible, you can use a metal mesh
braid to establish an earth connection (sold separately)
5. Navigate to Main Menu A, then Press the F1 key to begin the test
6. The test will be conducted
7. Once complete, read and record results appropriately
If the result was a PASS - Tag with PASS tag showing “next test due” date and return the device to service.
If the result was a FAIL - Tag the DUT with a DANGER tag and remove the device from service.

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Class 2 Test - Double Insulation Test – Menu A - F2
The Double Insulation Test completes the following test sequences as part of its procedure:
1. Integrated Supply Mains Test - Refer to Integrated Test section
2. Integrated NCNT Test Refer to Integrated Test section
3. Double Insulation Test (@250V or 500V): pass level greater than 1MΩ
Procedure:
1. Complete a Visual Inspection, and inspect the compliance plate to ensure the
appliance is a Class 2 appliance. Look for the double insulated symbol, seen here.
2. Plug the appliance into the appliance test socket of the TnT RCD
3. Navigate to Main Menu A, then Press the F2 key to begin the test
4. Read and record results appropriately
If the result was a PASS - Tag with PASS tag showing “next test due” date and return the device to service.
If the result was a FAIL - Tag with a DANGER tag and remove the device from service.
Note: In some situations, if the device is labelled with “Surge Protection Fitted” or if it contains MOV’s (Metal
Oxide Varistors), conduct a 250V-insulation test. Always read the compliance plates before testing, especially
on surge protected powerboards. If unsure always refer to the AS/NZS:3760:2010 Standard. Should it still fail,
remove it from service.
Lead Test (Extension Lead Test) – Menu A - F3
Note: Extension leads should always be uncoiled before using or testing. Please ensure that the IEC Adaptor & the IEC
socket are inserted firmly or it may result in a continuity/polarity fail.
The Lead Test completes the following sequence as part of its comprehensive testing procedure:
1. Integrated Supply Mains Test - Refer to Integrated Test section
2. Earth Bond Test (@ 200mA): 200mA test current, pass level less than 1Ω
3. Insulation Test (@ 250V or 500V): pass level greater than 1MΩ
4. Continuity and Polarity Test 240VAC @ 2mA Checks continuity & polarity of leads
Procedure:
1. Complete a Visual Inspection
2. Plug in the IEC-550 Orange Lead adaptor lead supplied into the IEC socket.
3. Plug male end of extension lead or power board into the appliance test socket.
4. Connect the IEC-550 Orange lead to your extension lead
5. Navigate to Main Menu A, then Press the F3 key to begin the test
6. Read and record results appropriately.
7.
If the result was a PASS - Tag with PASS tag showing “next test due” date and return the device to service.
If the result was a FAIL - Tag with a DANGER tag and remove the device from service.
TnT RCD Testing Menu – Main Menu B
Use the Enter button to switch between Menu A and Menu B. All tests on Menu B require a Mains Power source.
Power Test - Menu B – F1
The Power Test is for the purposes of monitoring and performance of equipment. The Power Test feature is
for single phase appliances only. The Power Test allows the user to turn the appliance on and measure its
performance as a digital wattmeter.
Displayed parameters are:
• Volts AC
• Current
• Volt Amp
• Power Factor
• Watts
This test is ideal for service agents and electricians. The user can plug in the appliance and turn it on with real
time measurements displayed on the display. This is useful when testing an appliance with a compliance/
name plate on it. The operator can compare the name plate details of operating voltage, operating current,
and power factor etc. Should the appliance exceed the said values on the name plate it could be deemed faulty
and require service.
The Power Test completes the following sequence as part of its comprehensive testing procedure:
1. Integrated Supply Mains Test - Refer to Integrated Test section
2. Power Test
Caution: Before operating ensure the equipment is firmly secured to eliminate the possibility of causing injury
or damage. This function will power the appliance on, and in the case of appliance with movable parts these
parts may begin to move. Ensure the appliance can power on safely before proceeding.
Procedure:
1. Complete a Visual Inspection. If the unit passed the Visual Inspection, continue with the following
instructions. If not, refer to the First Test section.
2. Ensure the appliance is safely located and secured, as it will be powered and operational during this test.
3. Plug male end of appliance into Appliance Test Socket.
4. Press F1 to start the power test.
5. A warning message will appear on screen. If the appliance is safely located and secured press F3 to
proceed. The unit will power on.
6. Read and record results appropriately.
7. Once the appliance has powered down and the test is complete, unplug the unit.
8. Press Enter to return to the main menu.
Note: Because the power test is not required in the electrical testing standards there is no pass/fail value built in to the
tester. It is up to the user to determine if the item is a pass or a fail based on the compliance/name plate.
If the result was a PASS - Tag with the appropriate tag including “next test due” date and “return to service”.
If the result was a FAIL - Tag with a DANGER TAG and remove the unit from service.

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Leakage / Run Test – Menu B – F2
Note: Leakage Tests can only be conducted when connected to mains power.
The Leakage Test is an alternate method to perform insulation resistance tests. Leakage testing is a major
function of the TnT RCD. There are three types of Leakage test available on the TnT RCD - take care to ensure
you use the correct test for your appliance.
This test determines errors of leakage not otherwise detected in a normal insulation test. If there are any
doubts with insulation testing of the equipment, the Standard (AS/NZS:3760) allows for a leakage test to be
carried out instead. The TnT RCD has been designed to perform these tests. The Leakage Test applies power to
the Device Under Test and measures any imbalance or leakage current. The leakage is tested to the limits of
the class types specified in the Standard AS/NZS 3760 i.e. Class 1 = > 5mA as Fail.
The limit of imbalance measured on the TnT RCD will read well in excess of the limits set in mA. However,
should the supply circuit be protected by an RCD this device will trip anywhere between 10 to 30mA and trip
the mains supply switch OFF. The Leakage Test allows the user to operate the appliance in normal operation
conditions and measure its Operating Leakage current. The displayed parameter is mA. The mA Display Range
0.0 to 22.0 mA.
A predefined value for individual class types is programmed into your TnT RCD. These limits are set according
to the AS/NZ3760. Should these values change in future it can be simply altered in firmware. The run time
period can be adjusted (by 5 second increments). The value can be changed by selecting the leakage test time
in the options menu. The factory default setting is 20sec. The value for the leakage runtime is also used for the
power test.
Caution: Before operating ensure the equipment is firmly secured to eliminate the possibility of causing injury
or damage. This function will power the appliance on, and in the case of appliance with movable parts these
parts may begin to move. Ensure the appliance can power on safely before proceeding.
Procedure:
1. Complete a Visual Inspection. For details refer to the First Test section. If the device passed the Visual
Inspection, continue with the following instructions, if not, refer to the First Test section
2. Ensure that the appliance is safely located and secure as it will be powered and operational during this
test.
3. Plug the appliance into the Appliance Test Socket of the TnT RCD
4. If testing a Class 1 Appliance, plug the IEC Clamp Cable into the IEC socket of the TnT RCD, then clamp it
onto earthed metal on the appliance
5. If testing an RCD, plug the IEC-550 Orange Cable into the IEC socket of the TnT RCD, then plug it into a
socket on your RCD and turn that switch on
6. Navigate to Main Menu B, then press F2 to enter the Leakage Test Menu(cont...)
7. Press a function key to start the test
F1 = Earth Leakage, limit set to MAX then 5mA fail
F2 = Double Insulated Leakage and Extension Leads, limit set to MAX then 5mA fail
F3 = RCD Leakage (not a full RCD Trip Time or Ramp Test)
8. The TnT RCD will conduct the first part of the test without powering the appliance
9. A warning will be displayed on screen - ensure the appliance is safely located, then press F3 to power the
appliance and continue the leakage test
10. Your results will appear on the screen - If you have a Wavecom tag printer you can now print the tag,
otherwise you can now end the test.
If the result was a PASS - Tag with the appropriate tag including “next test due” date and “return to service”
If the result was a FAIL - Tag with a DANGER TAG and remove from service.
RCD Tests – Time Test / Ramp Test– Menu B – F3
Before Testing
When any RCD testing is to be carried out on any circuit that is protected by an RCD in the main switchboard
(upstream), it’s most likely to trip this upstream RCD. When performing RCD Trip Time or Ramp current tests on
any portable RCD devices, the RCD in the switchboard may trip faster. This is due to increased upstream levels
of leakage current from the additional circuits and devices connected to it. The fixed RCD’s may also have
better connectivity, sensitivity and mechanical mechanisms.
To avoid tripping large areas in the work place monitored by the switchboard RCD it is suggested that an
Isolation Transformer be used. Wavecom Instruments offer an Isolation Transformer, designed specifically for
the purposes of field RCD tripping. Do not use these transformers for any other purpose. Rated 240VAC In,
240VAC Out @ 30VA. Fuse protected, Primary Winding 500mA.
Types of RCD
There are two types of RCD - Type 1 and Type 2:
Type 1 - Has a trip time of < 40mS and a trip current of < 10mA. These types of RCD’s are mainly used on sites
containing medical equipment. These types of RCD’s must be compliant with AS3551. (Please refer to this
AS3551 standard if unsure)
Type 2- Has a trip time of < 300mS and a trip current of < 30mA. Unless specified on the RCD device nearly all
RCD will be this type. This is the default setting on all new units.
RCD Testing Setup
When testing RCDs, different kinds of RCDs will require different test setups. Consult the diagrams below to
determine which setup is required for your situation.
Testing Fixed RCDs
Wavecom
Isolation
Transform-
Testing Portable RCDs with no physical switch
Testing Portable RCDs with physical switches

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RCD Trip Time Testing:
This test is designed to trip RCD devices at a fixed current and to determine the trip time of the RCD device.
During an RCD Trip Time test, the TnT RCD injects a true fault current value using a real-time compensation
calculation of the actual voltage at the time of test, delivering a true and accurate trip current. The TnT RCD will
measure the time the RCD takes to trip in milliseconds, and display it on the screen. This function is factory set
to 30mA for fast testing, but the user can set the current to x0.5, x1.0 or x5.0 using the RCD Multiplier.
For example:
30mA * 0.5 =15mA
30mA * 1.0 = 30mA - This also is effective on any set test current of the RCD tester from 5mA to 500mA output.
30mA * 5.0 = 150mA
These tests should result in no-trip, trip & fast trip times respectively.
To enter the RCD menu from Main Menu B, press the F3 button. Then, to set up a Trip Time Test, press F1. Before
performing an RCD Trip Time Test, the TnT RCD should be configured to ensure an accurate result.
RCD Test Options:
To adjust the Trip Time test options, press F3 . This allows the user to set the trip current level, 5mA to 500mA.
The RCD type can also be select here depending whether the unit is a Type I or Type II RCD. From the options
menu, press F2 to change the current level and F3 to change the RCD type.
Adjusting the current level:
The TnT RCD displays and maintains the last set trip current value. If the user wishes to change the value of the
trip current the following steps enable the changes. Press F2 from the options menu to display test current.
F1 - Raises the trip current in 1mA increments to 500mA. Hold the button and the value will scroll faster the longer it is
pressed. Once 500mA limit is reached the value will then loop over and start again from 0mA
F2 - Decreases the trip current in 5mA increments. Hold the button and the value will scroll faster the longer it is pressed.
Once 0mA limit is reached the value will then loop over and start again from 500mA.
Enter - Sets the selected current for the next trip time test. The TnT RCD will then return to the current trip time test
screen.
Changing RCD Type:
Depending on the RCD, the RCD type needs to be selected from the options menu. These options change the
pass / fail values when performing RCD tests. Please make sure that you have the correct RCD type selected.
F1 - Sets RCD Type to Type 1
F2 - Sets RCD Type to Type 2
You will be promoted to enable or disable Portable RCD (PRCD) testing - unless you are testing a switchboard
RCD, turn PRCD on.
Conducting the Trip Time Test
1. Complete a Visual Inspection. For details refer to the First Test section. If the device passed the Visual
Inspection, continue with the following instructions, if not, refer to the First Test section.
2. Navigate to Main Menu B, and press F3 to enter the RCD Menu, then press F1 to select Time Test
3. Press F3 to enter the Time Test options menu, to ensure your TnT RCD has the correct settings for the type
of RCD (cont...)
4. (cont...) Once your TnT RCD is set up correctly, select either the 0° (Positive) or the 180° (Negative) Phase to
test. Both phases should be tested, and after the first test, you can select ‘Retest’ to test the other phase.
5. When ready, press F3 to begin the test - the RCD will trip, and the time will be recorded in milliseconds.
6. TnT RCD testers will switch to battery power (if charged) and stay on, but will need to be Mains Powered
again to conduct further RCD tests.
7. You can now retest the other phase of the RCD, or simply print your tag and record your results.
RCD Ramp Testing
This test is designed to trip RCD devices using a ramping up current value, to determine the trip current of the
RCD device. This useful test allows the user to determine circuit leakage load/pre-loading of RCD circuit. This
can assist in determining nuisance tripping issues (RCD is too sensitive) or determining RCD performance if
suspected faulty or inconsistent in performance. The TnT RCD has a nominal leakage current of 2mA, which
should be added to the result of test.
E.g. if RCD tripped at 22mA, add 2mA to get a value of 24mA trip current.
To enter the RCD menu from Main Menu B, press the F3 button. Then, to set up a Ramp Test, press F2. Before
performing an RCD Ramp Test, the TnT RCD should be configured to ensure an accurate result.
Changing RCD Type:
Depending on the RCD, the RCD type needs to be selected from the options menu. These options change the
pass / fail values when performing RCD tests. Please make sure that you have the correct RCD type selected.
F1 - Sets RCD Type to Type 1
F2 - Sets RCD Type to Type 2
You will be promoted to enable or disable Portable RCD (PRCD) testing - unless you are testing a switchboard
RCD, turn PRCD on.
Conducting the Ramp Test
1. Complete a Visual Inspection. For details refer to the First Test section. If the device passed the Visual
Inspection, continue with the following instructions, if not, refer to the First Test section.
2. Navigate to Main Menu B, and press F3 to enter the RCD Menu, then press F2 to select Ramp Test
3. Press F2 to select your RCD Type, and turn Portable RCD testing on or off
4. Press F3 to begin the test - the TnT RCD will increase the current to the RCD until it trips, displaying the
current on screen.
5. TnT RCD testers will switch to battery power (if charged) and stay on, but will need to be Mains Powered
again to conduct further RCD tests.
6. You can now print your tag and record your results.

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Meter Mode®
Meter Mode Features
Electrical parameters are displayed as Volts, Amps, Watts, and Volt / Amps. These electrical parameters will be
displayed on the Testers main screen display. Select from the 4 Test available in Meter Mode.
Meter Mode measures and displays volts in AC, Current in Amps, Power Measurement in Watts and VA in Volt/
Amps
Typical Applications
• Measuring the Power of a bar heater, or electric power drill
• Check appliance ratings and compare them to that on the compliance plate
• Quick test of Power outlet Voltages in rooms or locations split from multiple circuits.
How to use Meter Mode
1. Conduct a visual inspection, and inspect the compliance plate to determine the expected results
2. Plug in the appliance to the appliance test socket on your TnT RCD.
3. Ensure the appliance is safely located and secured, as it will be powered during this test.
4. Press and Hold F3 to enter Meter Mode
5. When ready, press F3 to begin Meter Mode, then press F3 to power the appliance.
6. Press F3 to scroll through the options (Volts, Amps, Watts & Volt/Amps in that order)
7. To end Meter Mode, simply press Enter, then to leave Meter Mode and return to the Menu, press Enter
again. The TnT RCD will stay in Meter Mode when powered off
Explanation of Electrical Parameters
Volts
A volt is the used to measure the energy available in the electrical current of a circuit. Voltage controls the available electrical
power (wattage).
Amperes (aka Amps)
An amp is the unit used to measure electrical current as it flows past a specified point.
Watts
A watt is the unit used to measure the amount of actual flowing electrical energy.
Volt-Amps
A volt-amp is the unit used to measure the apparent electrical power used by computing equipment. Mathematically, it is
expressed as volts times amps (V*A). Because it represents the amount of energy computing systems may draw from a power
grid, Volt-Amp measurements are used to determine the kind of wiring and circuit breakers required to support the computing
equipment in question.
Watts and VA - Detailed Explanation
The power drawn by equipment is expressed in Watts or Volt-Amps (VA). The power in Watts is the real power drawn by the
equipment. Volt-Amps are called the “apparent power” and are the product of the voltage applied to the equipment times the
current drawn by the equipment. Both Watt and VA ratings have a use and purpose. The Watt rating determines the actual power
purchased from the utility company and the heat loading generated by the equipment
Disclaimer
Meter Mode is to be used for quick simple indicative electrical parameter measurements. Providing reasonably
accurate readings without the need to carry any other instruments. It is not intended to replace specific, more
accurate individual test equipment, nor is its purpose to replace prescribed testing requirements. It in doubt
please consult a qualified electrician when unsure or perform proper test procedures.
TnT RCD Specifications
Mains Supply Test
Checks Polarity and continuity of mains supply by LED indicators (A-N, A-E, and N-E). (Flashing red LED indicates test fail)
Class 1 Earthed Appliance
Appliance Check: Ensures appliance is plugged in and turned on.
Earth Bond Test: 200mA test current. Pass level Less than 1.0 Ω. Measurement: 0.01Ω to 10 Ω.
Insulation Test: 500VDC / 250VDC. Pass level Greater than 1M Ω. Measurement: 0.1Ω to 10MΩ. *See also Leakage Test
Class 2 Double Insulated Appliance
Appliance Check: Ensures appliance is plugged in and turned on.
Insulation Test: 500VDC / 250VDC. Pass level greater than 1MΩ. Measurement: 0.1Ω to 10MΩ. *See also Leakage Test
Extension Leads
Earth Bond Test: 200mA test current. Pass level Less than 1Ω. Measurement: 0.01Ω to 10.0Ωs
Insulation Test: 500VDC / 250VDC. Pass level Greater than 1MΩ. Measurement: 0.1Ω to 10.0MΩ.
Continuity/Polarity Test: 250VAC check continuity and polarity of leads. Displays Pass/Fail.
Leakage Test
Leakage Current: 0 to 30.0mA at 200 to 265V
Earth Leakage Test: 240VAC Mains. Pass level 1, 2.5, 5.0 mA leakage test levels with up to 10 Amp load operation (20 Amp
load for TnT RCD 20A)
Note 1: Pass level for CLASS 1 is 5 mA; pass level for CLASS 2 is 1 mA
Note 2: Leakage test may be performed if for any reason a standard CLASS 1 or CLASS 2 is not possible.
RCD Test
Trip Current: 2 to 500mA in 1mA steps. User selectable.
Trip Time: 0 to 3,000ms at .001sec resolution.
Current Ramp Trip Test: 0 to 500mA in 1mA increments.
Power Measurement
Leakage Current: 0 to 30.0mA at 200 to 265V
Load Current: 0.0 to 10Amp (20Amp for TnT RCD 20A)
Voltage: 200 to 265VAC
Power Factor: 0.00 to 1.00
Apparent Power: 0 to 2400VA
Power: 0 to 2400W
Meter Mode®
Green flashing LED denotes MM is engaged
Load Current: 0.0 to 10Amp
Voltage: 200 to 265VAC
Apparent Power: 0 to 2400VA
Power: 0 to 2400W
Apparent Power: 0 to 2400VA
Power: 0 to 2400W

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TnT RCD User Manual Wavecom TnT RCD User Manual Wavecom
Technical Information
Visual Inspection
Visual inspection has to be done before any other test is carried out using the TnT RCD.
The visual inspection is carried out to ensure there are no physical faults with the appliance before testing.
The following list is an example of potential physical faults, but it is not exhaustive and the relevant standards
must be consulted to ensure a proper Visual Inspection is undertaken.
• There is no damage or component defects to the accessories, plugs, outlet sockets or connectors (physical).
• There are no cracks &/or abrasions.
• There are no exposed inner cores or conductors (flexible) and the supply cords are not twisted or distorted.
• Any Fuse / Over load protection components (if fitted) are checked.
• All labels, markings and warning indicators (of the maximum load to be connected to the device) are
legible and intact.
• The insulation is not damaged in any way i.e. melted, cuts or abrasions. There are no iron filings in the
insulation. There is no insulation tape on the lead.
• Any flexible cords and/or leads are effectively anchored (glands and grommets intact).
• All covers or guards are in place and secure as intended by the supplier/manufacturer.
• All safety devices and systems are in good working order. (i.e. overload latches & buttons).
• No dust &/or dirt obstructs any exhausts or ventilation outlets.
• All controls are working properly and are secure and aligned.
Important - If Result is a Fail:
If any Equipment fails ANY of the above, it should be deemed to have FAILED the Visual Test, and therefore
no other tests need be performed. If this is the case the Equipment should be tagged with a DANGER TAG and
removed from service. It is recommended by the manufacturer and distributor of this product that it SHOULD
NOT BE RETURNED TO SERVICE. To do so would be considered unsafe.
Class 1 (Earthed Appliance) Construction
Single basic insulated and protectively earth equipment
This type of product design provides two safety barriers between all live conductors at dangerous voltages and
the equipment user.
The provision of basic insulation between exposed metal parts and live parts is the first barrier to provide
basic protection against electric shock.
The second safety barrier is by the connection of exposed (accessible) conductive (metal) parts to the
protective earthing conductor (earth wire) in the fixed wiring of the device/Installation.
The protective earthing terminal of the equipment must be marked with the word “earth” or the symbol “E” or
the symbol for Earth Terminal or Protective.
To perform this test, a continuous earth loop must be made between the exposed conductive material (metal)
and the TnT RCD appliance tester. This is done by means of connecting the earth lead with the crocodile
clip/probe attached to a GOOD earth point (paint & coatings will not provide effective connections) and the
appliance plugged into the TnT RCD appliance testers’ test socket. The Maximum allowable limit is less than
1.0Ω.
Class 2 (Double Insulated) Construction
Double insulated equipment
This method of construction employs two safety barriers comprising two layers of insulation between
dangerous voltages and the user of the equipment.
The first layer of insulation is formed around the live conductor and is termed ‘the Functional Insulation’.
The second layer of insulation is termed ‘the Supplementary Insulation’. In Class II equipment, protection
against electric shock does not rely on basic insulation only, but has additional supplementary insulation such
as double insulation or reinforced insulation provided, there being no reliance on precautions in the fixed
wiring of installation.
Class II equipment is marked with the words “DOUBLE INSULATION” or the symbol:
For double insulated under Safety Symbols:
Note 1 – Double Insulation is insulation comprising both basic and supplementary insulation.
Note 2 – Reinforced Insulation is a single insulation system with a degree of protection against electric shock, which is
equivalent to double insulation.
Testing of Electrical Equipment
Many testing personnel have some reservations in testing sensitive, electronic equipment using a 500V DC
insulation test. There is a perceived fear of causing internal damage from over voltage. With the introduction
on the TnT RCD Range of appliance testers, these concerns are alleviated.
The TnT RCD can safely test electronic equipment as the tests are carried from Active-Neutral (shorted by a
relay inside the tester) to Earth. In this mode no dangerous voltages pass through to the internal components
of the appliance, or Device Under Test (‘DUT’). If these tests are done using an Insulation Tester and the user
tests Active to Neutral, this could potentially cause damage.
Some changes may be required in certain configurations where fitted surge protection devices (MOV’s) in the
DUT may cause a failed test result. Applying 500V in this these situations can cause the surge protection
devices to trip, therefore conducting the applied voltage to earth, thus showing a failure of insulation. In these
instances the test voltage should be changed to 250V, then the DUT should be retested. If the DUT still fails,
check with the DUT Operators’ Manual or an electrician. (for details see - ‘Double Insulation Test’ 250/500VDC
to change test voltage).
Under these circumstances, it would be difficult for any damage to occur to either the surge protection device
or the DUT, as there is insufficient current generated by the TnT RCD.