Instruction Manual for KEWTECH models including: KT400DL, KT400DL Loop Impedance and PSC Tester, Loop Impedance and PSC Tester, Impedance and PSC Tester, PSC Tester, Tester
kewtechcorp.com kewtechcorp.com 10 11 Power supply 4 x AA LR6 Batteries Battery life 50 hours Overvoltage category CAT III 500V CAT IV 300V Operating temperature 0 - 40ºC Storage temperature-10 to 60ºC Operating humidity 80% @ 31ºC to 50% @ 40ºC Safety compliance BSEN 61010-2-030:2010 EMC compliance BSEN 61326-2-2:2013 Performance standard
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DocumentDocumentKT400DL Loop Impedance & PSC / PFC Tester Operating Instructions 1 kewtechcorp.com 1. SAFETY 1.1 Equipment Markings Caution - refer to the instruction manual. Construction is double insulated. Product should be recycled as electronic waste. Conforms to EU standards. >550V Prohibited to use on Electrical Systems which use voltages above 550V. Measurement Category IV is applicable to testing and measuring circuits at the origin of the installations supply. CAT They are utility level CAT checks. This part of the installation 2 IV is expected to have a minimum of one level of over-current protective device between the transformer and connecting 300V points of the measuring circuit. This tester's voltage rating for CAT IV locations is 300V, where the voltage is Phase (line) to Earth. CAT III 500V Measurement Category III is applicable to testing and measuring circuits connected after the source of the building's low-voltage MAINS installation. This part of the installation is expected to have a minimum of two levels of over-current protective devices between the transformer and connecting points of the measuring circuit. Examples of CAT III are measurements on devices installed after the main fuse or circuit breaker fixed within the building installation. Such as distribution boards, switches and socket outlets. This tester's voltage rating for CAT III location is 500V where the voltage is Phase (line) to Earth. kewtechcorp.com 1.2 Operational Safety The KT400DL is designed to be used by skilled persons in accordance with safe methods of work. If the KT400DL is used in a manner not specified by Kewtech, the protection provided by it may be impaired. Inspect the product before using. If any damage is visible; such as cracks in the casing, damage to any accessories, leads or probes, the unit should not be used. Do not operate the KT400DL with the battery cover off as this will compromise the insulated safety barrier. To maintain safety, ensure serviceability and to monitor accuracy of the KT400DL, the tester should be checked on a checkbox such as the Kewtech FC2000 checkbox at regular intervals. 3 Although fully protected against over voltage up to 440V, the tester should only be used on 230V systems. Contents KT400DL Loop Impedance and PSC/PSF Tester KAMP 12 Mains lead Batteries Carry Case Manual Optional ACC063 distribution board lead set Kewcheck R2 - socket test lead adapter Lightmates test lead adapters for lighting points kewtechcorp.com 2. DESCRIPTION The KT400DL is a no trip and high current, high resolution digital earth loop impedance tester. 2.1 Features · No Trip LOOP L-E test · High current L-E loop test · High current, High resolution L-E loop test · High current, High resolution L-N loop test · AC Voltage VLN - VLE - VNE · Distribution network operator polarity test pad · PFC / PSC measurements · Hands free function · Polarity, voltage present LED · Auto switch off function for battery preservation. 4 2.2 Indication The white display backlight will illuminate on switching on and during testing. To preserve battery life the backlight will switch off after approximately 4 seconds of inactivity. The unit will automatically power off after approximately 3 minutes of inactivity. To switch the tester back on after auto power off, press any button. Battery status Mains Mains voltage indication LCD display shown in the no trip loop function. kewtechcorp.com 3. USAGE Volts Present / Polarity LED Voltage LN/LE/NE toggle button Hands Free selection button PFC - PSC / Voltage toggle button 5 Rotary selection dial Polarity touch pad 4mm colour coded sockets kewtechcorp.com 3.1 Battery Installation Unit requires 4 x AA batteries. Ensure that all test leads are removed before installing batteries. Remove the rubber over-mould and battery cover on the reverse of the unit. Install the new batteries ensuring correct polarity as indicated. After installing batteries and before use ensure the battery cover and overmould are correctly fitted, switch on the unit and check for correct operation. Dispose of used batteries as per the local authority's guidelines. 3.2 Operation Loop No Trip L-E This is a three wire test to measure Zs where the circuit is protected by 6 an RCD. Where possible non-essential electrical equipment should be disconnected to reduce the chance of the RCD tripping as a result of leakage build up. Turn the rotary dial to the Loop No Trip L-E position. Allow the tester to conduct a self test and check the incoming voltage and polarity. Voltage L-N will be displayed and Volts Present LED will illuminate green. Push TEST. Loop result will be displayed with voltage L-N. Hi current loop modes Unlike most testers that only measure the resistance of the Loop, the high current mode of the KT400DL will measure the true Impedance of the Loop which includes an element of reactance. This can be significant where the distribution board is close to the mains supply transformer and the KT400DL's method is therefore much more accurate than older Loop testing techniques. You should be aware that because of this there may well be variations in readings compared to ordinary loop testers or to the no-trip function kewtechcorp.com of this tester, particularly when the measurement is made near to the mains supply transformer. Loop Hi Current L-E in 3-wire Testing This Hi current test is used to measure Ze at the distribution board before any RCD or Zs where the circuit is not protected by an RCD. Turn the rotary dial to the Loop Hi L-E Position. Voltage L-N will be displayed and green volts present LED will illuminate green if conditions are correct. Push TEST. Loop result is the true loop impedance and will be displayed with Voltage L-N. Loop Hi Resolution L-E (and L-N) in 3 wire Testing This Hi current high resolution test is used to measure Ze at the distribution board which is close to a transformer and gives a 0.001 7 resolution. It also has to be conducted before any RCD in the circuit or can be used to measure Zs where the circuit is not protected by an RCD. Turn the rotary dial to the Loop Hi high resolution L-E (or L-N) Position. Voltage L-N will be displayed and green volts present LED will illuminate green if conditions are correct. Push TEST. Loop result is the true loop impedance and will be displayed with Voltage L-N. Lead Configuration for Hi Current 2-wire Testing. Both the Loop Hi current L-E and Loop Hi resolution L-E (and L-N) tests can be conducted in two wire mode by using the ACC063 test leads (not included with the instrument, available as an option). To arrange the test leads in 2-wire mode pull the blue prod or crocodile clip off the blue test lead and plug the Blue probe into the back of the Green 4mm connector as shown overleaf. You will now have the Earth and Neutral leads connected together ready kewtechcorp.com for connection to the Earth or Neutral conductor to be tested. NB: In two wire mode the loop measurement, voltage displayed and PSC/PFC results will pertain to the L-E or L-N circuit to which the test leads have been connected. Hands Free Prods in 2 wire testing configuration The Hands Free function can be used with any loop measurement. Select the loop measurement required with the rotary dial. Press the Hands Free button HANDSFREE will be displayed on the screen. Once the tester is connected, correct voltage and polarity is confirmed a loop test 8 will be conducted without TEST being pressed. Volts L-N/ L-E / N-E Voltage L-N is the tester's default setting. By pressing VOLTS LN-LENE the voltage displayed will be toggled. The voltage displayed can be toggled before or after a loop test is carried out. PFC / PSC After a loop test has been carried out the calculated PCF or PSC can be displayed by selecting PFC L-E / PSC L-N. See note under lead configuration for Hi current two wire testing when used in two wire mode. Polarity Test Pad It is a little known fact that a system can be reverse wired at the distribution board with Live (Phase) to earth/neutral and earth/neutral to Live (Phase). In this condition the sockets will all work and conventional kewtechcorp.com loop testers will show and test that everything is correct despite this very dangerous wiring condition. Although extremely rare, this dangerous condition can exist so if your test shows this fault do not proceed. Touch the touchpad area next to the test button. There should be no change in the indication given. If the Voltage/Polarity LED flashes Red and a warning tone is emitted when the touchpad is touched a potentially dangerous polarity reversal exists. Do not proceed. If in any doubt advise the customer to contact the electricity supply company immediately. 4. MAINTENANCE AND SERVICE If required, clean with a damp cloth and mild detergent. Do not use abrasives or solvents. 9 With the exception of the batteries there are no user serviceable parts. Contact Kewtech for parts and technical assistance. WARRANTY - 2 years manufacturer's when registered on the website: Kewtechcorp.com/product-registration ExpressCal, Unit 2, Shaw Wood Business Park, Shaw Wood Way, Doncaster DN2 5TB T: 01302 761044 E: expresscal@kewtechcorp.com 5. SPECIFICATION Range 0 to 260 V Voltage Accuracy ± (3% + 3 digits) kewtechcorp.com No Trip L-E Loop Test (No trip L-E mode, 3 wire testing, Phase - Neutral - Earth all connected) Range Accuracy 0.00 to 99.99 ± (5% + 5 digits) 100.0 to 499.9 ± (3% + 3 digits) Hi I L-E Loop Test (HI I L-E mode, 3 wire testing, Phase - Neutral - Earth all connected) Auto Range Accuracy 0.00 to 500.0 ± (3% + 3 digits) Hi-Resolution, Hi I L-E / L-N Loop Test (HI I L-E/L-N mode, 3 wire testing, Phase - Neutral - Earth all connected) 10 Range Accuracy 0.000 to 9.999 + (3% + 30 m) 10.00 to 99.99 + (3% + 3 digits) 100.0 to 500.0 + (3% + 3 digits) Supply Voltage Overprotection 195 - 260V (50 - 60 Hz) 440V The following are details of the operating ranges for individual functions compliant with the performance requirements of EN61557 Measurement Range Loop No Trip 0.010 - 500 Loop Hi-I 0.01 - 500 Operating Range EN61557 Other 1.04 - 500 230 V 50 Hz 1.04 - 500 230 V 50 Hz kewtechcorp.com Power supply 4 x AA LR6 Batteries Battery life Overvoltage category Operating temperature 50 hours CAT III 500V CAT IV 300V 0 - 40ºC Storage temperature -10 to 60ºC Operating humidity 80% @ 31ºC to 50% @ 40ºC 11 Safety compliance BSEN 61010-2-030:2010 EMC compliance Performance standard Probes BSEN 61326-2-2:2013 BSEN 61557-1:2007 BSEN 61557-3:2007 GS38 compliant Dimension (mm) 180mm x 85mm x 50mm Weight (g) Approximately 450g kewtechcorp.com For repair and calibration please return to us at : Express Cal Unit 2, Shaw Wood Business Park, Shaw Wood Way, Doncaster DN2 5TB 0345 646 1404 (Select option 2) expresscal@kewtechcorp.com Kewtech Corporation Ltd Suite 3 Halfpenny Court, Halfpenny Lane, Sunningdale, Berkshire SL5 0EF 0345 646 1404 sales@kewtechcorp.com kewtechcorp.com