Voltage / Magnetic Indicator
TEK 200
INSTRUCTIONS
Voltage / Magnetic Indicator
Non contact electric and magnetic field indicator with audible warning and self-test feature.
For conductors energised at voltages in the range of 100V to 600V AC and for inductors,
relays, solenoids and transformers operating from low voltage AC/DC and above. The user
is part of the response circuit.Also suitable for permanent magnets and for indication of the
polarity of machine windings.
TECHNICAL SPECIFICATION
Supply:
9V alkaline battery, MN1604 or equivalent (included).
Voltage Range:
100 to 600V AC.
Voltage Sensitivity:
See table below.
Magnetic Sensitivity:
±10mT.
Frequency Range:
0 to 50kHz.
Indicators:
LED (green) and audible tone (3kHz) - South Pole Magnetic
LED (red) and audible tone (3kHz) - North Pole Magnetic
Operating Temperature:
-5 to 40°C.
Case:
Yellow ABS.
Dimensions:
202 x 32 x 22mm.
Weight:
150g.
Typical Sensing Distance of Energised Cable
WARNING
The sensing device must be tested before and after use to ensure full functionality.
DO NOT USE THE TESTING DEVICE IF THE RED, GREEN AND AUDIBLE TONE
INDICATORS ARE NOT SIMULTANEOUSLY ACTIVATED IN THE TEST POSITION.
From some directions the neutral and earth conductors in cables will shield the live,
so it’s important that a cable is explored from all directions. This unit is a non
contact device and is not to be put in contact with hazardous conductive surfaces.
When testing for the presence of voltage in multi-core cables always run the
sensing device along a short length of cable so as to overcome the natural twist in
conductors.
Replace battery if the green light fails to illuminate.
Cable Type
110V AC 50Hz
240V AC 50Hz
Flat 1mm2 Twin & Earth
3mm
23mm
Flat 2.5mm2 Twin & Earth 5mm
23mm
Round 1.5mm2
2mm
18mm
2
3
OPERATING INSTRUCTIONS
Electric Field Sensing
Hold the sensing device in the palm of the hand.
Slide the switch across the middle 'E' position with the thumb and check
that the green and red audible tone indicators are activated when the
push to test switch is pressed.
The sensing device is now ready for use.
The green and red indicators and audible tone will indicate and sound
simultaneously when the nose of the sensing device is placed in the
proximity of a live conductor.
Magnetic Field Sensing
Hold the sensing device in the palm of the hand.
Slide the switch across to the far right 'M' position with the thumb and
check that the green, red and audible tone indicators are activated when
the push to test switch is pressed.
The sensing device is now ready for use.
When the nose of the sensing device is placed in the proximity of a
magnetic field its polarity is indicated.
RED - for north pole
GREEN - for south pole
In the presence of an alternating electro-magnetic field both north and
south pole indicators are on.The audible tone will sound for unipolar and
bipolar magnetic or electro-magnetic fields.
4
Note:
Lines of magnetic flux flow from the north pole of a magnet to the
south pole of a magnet. These lines try to adopt the shortest possible
path. However, the directions that these lines exit initially from the north
pole and enter finally into the south pole are strongly influenced to lie
along the axis of the magnet. The lines of flux must bend to form circular
loops as they reach from north to south pole. Figure 1 shows the shape
of magnetic flux lines for a typical bar magnet and for a typical
horseshoe magnet.
The magnetic field sensing element of the TEK200 is within the tip. The
sensing element reacts to lines of flux entering the back (underside) of
the tip and exiting from the front (topside) of the tip, as shown in figure
2.
When assessing a magnet, it is important to make use of the figure 1
above to estimate the shape of the magnetic field. The magnet should be
placed in relation to the tip of the TEK200 to best achieve the arrangement
of flux lines as in figure 2. The polarity indicated on the front of the
TEK200 will be according to the example situations shown in figure 3.
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FIGURE 2
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FIGURE 1
