KEWTECH KT1795 Current and Voltage Tester Instruction Manual

KEWTECH KT1795 Current and Voltage Tester Instruction Manual

After unpacking, check that the instrument is undamaged. The product package comprises:
1 pc Tester KT1795
2 pcs batteries 1.5V, IEC LR03
1 pc instruction Manual

References marked on instrument or in instruction manual:

1.0 INTRODUCTION / PRODUCT PACKAGE

The voltage tester KT1795 is a universally applicable tester for voltage testing, continuity testing, rotary field testing and trip testing of RCD.
The voltage tester KT1795 is characterized by the following features:

• Designed to meet international safety standards. EN61243-3:2014
• Measurement Category (CAT.) IV 600V, III 1000V
• AC and DC voltage test up to 1000Vac and 1500Vdc with LCD
• Polarity indication
• Single-pole phase test
• Phase rotation test
• Trip Test of RCD
• Continuity test
• Resistance test
• Auto-power ON / OFF
• Torch light
• IP64 (IEC60529)
• Lower load impedance option to clear ghost or interference voltages

2.0 SAFETY MEASURES

⚠ The testers have been constructed and tested in accordance with the safety regulations for voltage testers and have left the factory in a safe and perfect condition.
⚠ The operating instructions contain information and references required for safe operation and use of the tester. Before using the tester, read the operating instructions carefully and follow them in all respects.

3.0 DANGER OF ELECTRIC SHOCK AND OTHER HAZARDS

⚠ To avoid an electric shock, observe the precautions when working with voltages exceeding 120 V (60 V) DC or 50 V (25 V) eff AC. In accordance with DIN VDE these values represent the threshold contact voltages (values in brackets refer to limited ranges, e.g. in agricultural areas).
⚠ The tester must not be used with the battery compartment open
⚠ Before using the tester, ensure that the test lead and device are in perfect working order. Look out e.g. for broken cables, damaged insulation or leaking batteries.
⚠ Hold the tester and accessories by the designated grip areas only, the display elements must not be covered. Never touch the test probes.
⚠ The tester may be used only within the specified measurement ranges and in low-voltage installations up to 1000VAC and 1500VDC.
⚠ The tester may be used only in the measuring circuit category it has been designed for.
⚠ Before and after use, always check that the tester is in perfect working order (e.g. on a known voltage source such as the KEWPROVE3 opening unit).
⚠ Make sure that the cables tested for current are double insulated.
⚠ The tester must no longer be used if one or more functions fail or if no functionality is indicated.
⚠ It is not permitted to use the tester during rain or precipitation.
⚠ An accurate display is guaranteed only within a temperature range of -5°C to +40°C at relative air humidity less than 85%.
⚠ If the safety of the user cannot be guaranteed, the tester must be switched off and secured against unintentional use.
⚠ Safety is no longer guaranteed e.g. in the following cases:
– obvious damage
– broken housing, cracks in housing
– if the tester can no longer perform the required measurements/ tests
– stored for too long in unfavourable conditions
– damaged during transport
– leaking batteries

⚠ The tester complies with all EMC regulations. Nevertheless it can happen in rare cases that electric devices are disturbed by the electrical field of the tester or the tester is disturbed by electrical devices.
⚠ Never use the tester in explosive environment
⚠ Tester must be operated by trained users only
⚠ Operational safety is no longer guaranteed if the tester is modified or altered.
⚠ The tester may be opened by an authorized service technician only.
⚠ The current test may only be performed on double insulated cables. If the indication “voltage present” appears although the checked part is considered as disconnected, it is recommended to verify additional measures if the measured voltage is an interference voltage or not.

4.0 INTENDED USE

The tester may be used only under the conditions and for the purposes for which it was designed. Therefore, observe in particular the safety instructions and the technical data including environmental conditions.

5.0 INSTRUMENT LAYOUT

1. Test Probe, L1
2. Test Tip, L2
3. Torch Light
4. Display
5. Torch Light Button / selects resistance measurement
6. Low impedance Push buttons / RCD test
7. Main body
8. Battery door

Control elements

1. Buzzer hole for sound indication
2. Single Pole Test ELV Warning
3. Continuity Test
4. Rotary field
5. LCD Display indication voltage, polarity, resistance and low battery
6. LED’s indicating 12V and polarity
7. Voltage Indication

6.0 PREPARATION FOR TESTS

6.1 Auto-power-on / switching on

• The tester switches on when it detects continuity, an AC or DC voltage above approx. 6V or a live phase on L2 (single pole test).
• It can be switched on with the torch light button.

6.2. Auto-power off

• Tester is automatically powered off after 30 sec when there is no signal contacted to the probes.
• The torch light switches off after approx. 30 sec.

6.3 Self-Test

• When voltage tester is off short both probes L1 and L2, hold probes shorted.
• All LEDs, all symbols on LCD and buzzer will be on for a 2s.
• Self-test will start automatically when replacing batteries.

If some of LEDs is not ON, or some LCD symbols are not ON or Buzzer or Torch light is not ON, the device is not safe for use. Replace the battery and start Self-Test again. If some of these indications are not ON again, the device is not safe for use and must NOT be used.
Do not use tester while Self-Test procedure is activated.

7.0 CONDUCTING TESTS

7.1 Voltage test

• Connect both probes to the object under test.
• The voltage is indicated by LEDs and LCD
• Buzzer sounds when a threshold voltage of 50VAC or approx. 120 VDC is exceeded.
• Voltage polarity is indicated in following manner.
  AC: + and ­ 12V LED are on +DC: +12V LED is on -DC: -12V LED is on (and “-” is shown on LCD)
  When the L2 probe + is the positive (negative) potential, the Polarity indication LED indicates “+DC” (“-DC”).
  During voltage test, L or R LED may light up. In case of low batteries, the ELV LED lights up >50VAC, >120VDC

7.2 Single-pole phase test

Function of this test may not be fully achieved if the insulation condition/ grounding conditions of user or of the equipment under test aren’t good enough. Verification of live-circuit shouldn’t be dependent on this Single- pole phase test only, but on the voltage test.

• Hold the tester well in your hand. Connect the “L2 +” probe to the object under test. Single pole LED lights up and buzzer sounds when a voltage of approx. 100V AC or more exists in the object under test. (Pol100VAC).

7.3 Phase rotation test

• L LED and R LED for Phase rotation test may operate on various wiring systems, but effective testing result can be obtained only on three-phase 4-wire system.
• Hold the tester good in your hand and connect both probes to the object under the test.
• Phase-to-phase voltage is indicated by Voltage LEDs.
• R LED lights up for Right rotary field.
• L LED lights up for Left rotary field.
• Measurement principle: The instrument detects the phase rising order regarding the user as earth.
  Function of this test may not be fully achieved if the insulation condition/ grounding conditions of user or of the equipment under test is not good enough.

7.4 Trip Test of RCD / Lower impedance voltage test

For voltage tests in systems with RCD (earth
leakage circuit breakers) an RCD can be tripped with a 10mA or 30mA nominal leakage current on single phase AC 230V power system.

• Connect probes “L1” and “L2” between L and PE of RCD protected system.
• Press simultaneously both of Trip TEST RCD Pushbuttons.
• The RCD should trip.
• This function is also used to lower the impedance of the test load to clear a higher level of ‘ghost’ or interference voltage.

7.5 Continuity test (Rx) / Diode test

⚠ The test circuit/object shall be de-energized before measurement.

• Check for the absence of voltage by conducting a two pole voltage test on the test object.
• Connect both test probes together or press the Torch Light Pushbutton to switch ON the tester.
• Connect both test probes to the test object. For continuity (up to approx. 500k) the Continuity Test LED ­ Rx is on and the buzzer is active.
• Continuity test automatically switches OFF after approx. 30 seconds if no continuity is detected. When tester is OFF, If continuity is detected it will be automatically switched on again.

7.6. Resistance test

⚠ Make sure that object test isn’t live.

• Switch into resistance measurement by short press of torch light. Connect both test probes to the object under test. Resistance up to 2k show on LCD display. For resistance less than 30 Ohm buzzer sounds continuously to indicate low continuity.
• Second short press switches into voltage measurement

7.7 Torch light

•  Pressing the torch light button will turn on the light and after approx. 30s it will turn itself off.
• When torch light is on, pressing the torch light button for more than 6s will turn off the torch.

7.8 Data Hold

⚠ Under data hold mode, The LCD screen will only show the last saved measured voltage value. There is no auto refresh of LCD screen reading under Data Hold mode whether the voltage tester is connected to energized or non-energized circuit. The LED voltage indicators will always show the actual voltage of the circuit under measurement.

• After pressing the Torch Light push button for more than 2 seconds, the data hold function is activated and replies with a short sound. The LCD screen shows “the last measured value” and the symbol “HOLD”. The hold function can be deactivated manually by pressing the Torch Light push button again. Function deactivation will be announced with a short sound.

8.0 BATTERY REPLACEMENT

⚠ Remove the probes from any testing point, when opening the battery case. Batteries are dead when the continuity test with both the test probes connected cannot be done anymore and the low battery symbol is shown in the LCD.

Follow the procedure below and replace batteries with new ones (type IEC LR03 1.5 V).

• Unscrew the battery door
• Pull out the battery door and replace the batteries. Insert new batteries according to the engraving on the battery door.
• Re-assemble battery door.

⚠ Confirm that the battery door case is properly locked prior to measurements.

9.0 TECHNICAL DATA

10.0 CLEANING AND STORAGE

⚠ Tester does not need any special maintenance if used according to user manual.
⚠ Remove tester from all test points before cleaning.
⚠ Use a lightly damp cloth with neutral detergent for cleaning the instrument. Do not use abrasives or solvents.
⚠ Do not expose the instrument to direct sun light, high temperature and humidity or dewfall.
⚠ Remove batteries when the instrument will not be in use for a long period.

11. SAFETY ADVICES

• Depending on the internal impedance of the voltage detector there will be a different capability of indicating the presence or absence of operating voltage in case of the presence of interference voltage.
• A voltage detector of relatively low internal impedance, compared to the reference value of 100 k, will not indicate all interference voltages having an original voltage value above the ELV level. When in contact with the parts to be tested, the voltage detector may discharge temporarily the interference voltage to a level below the ELV, but it will be back to the original value when the voltage detector is removed.
• When the indication “voltage present” does not appear, it is highly recommended installing earthing equipment before work.
• A voltage detector of relatively high internal impedance, compared to the reference value of 100 k, may not permit to clearly indicate the absence of operating voltage in case of presence of interference voltage.
• When the indication “voltage present” appears on a part that is expected to be disconnected of the installation, it is highly recommended confirming by another means (e.g. use of an adequate voltage detector, visual check of the disconnecting point of the electric circuit, etc.) that there is no operating voltage on the part to be tested and to conclude that the voltage indicated by the voltage detector is an interference voltage.
• A voltage detector declaring two values of internal impedance has passed a performance test of managing interference voltages and is (within technical limits) able to distinguish operating voltage from interference voltage and has a means to directly or indirectly indicate which type of voltage is present.

Certificate of Conformity and Warranty

Product: KT1795 Current Voltage Detector
This instrument has been calibrated using equipment which has itself been calibrated to standards traceable to International Standards monitored by BIPM (International Bureau of Weights and Measures). This certificate guarantees that the product has been fully inspected and conforms to all the relevant published
specifications.

FREE TWO YEAR GUARANTEE Kewtech’s Two Year Warranty enhances customers’ legal rights. It covers all manufacturing defects for a two year period but Kewtech reserves the right to exclude abuse or accidental damage.

RE-CALIBRATION SERVICE Regular re-calibration is recommended for this instrument. Kewtech recommends that with normal use the instrument be calibrated at least once in every 12 month period.When the instrument is due for re-calibration return it to the address below marked for the attention of the Calibration Department.

Simply go to kewtechcorp.com to register your instrument
Kewtech Corporation Limited Unit 2, Shaw Wood Business Park, Shaw Wood Way,
Doncaster DN2 5TB 01494 792 212

References

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