PROFESSIONAL MEASURING AND TEST INSTRUMENTS
PROFESSIONAL MEASURING AND TEST INSTRUMENTS
PROFESSIONAL MEASURING AND TEST INSTRUMENTS
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INSTALLATION <strong>TEST</strong>ER / ADAPTER | <strong>TEST</strong>BOY TV 440N | Digital earth resistance tester<br />
The earth resistance tester Testboy TV 440 is utilised to check the resistance between the ground reference and the connection<br />
point of the earthing system. Earth resistance measurements are prescribed for systems that are protected by<br />
automatic disconnection of the supply, lightning strike protection systems, telecommunications and fuel storage depots.<br />
The Auto power Off function prevents uncontrolled discharging of the batteries. The integrated timer turns the instrument<br />
off after five minutes of measurements; in this instant the Data Hold function saves the last measurement result.<br />
The requirements for measuring resistance to earth are described in the standards DIN VDE 0413, Part 5 and EN 61557-5.<br />
Earth resistance is determined by measurements based on the current/voltage method. For measurement purposes an<br />
alternating current is fed between the auxiliary earth stake and the earth electrode to be measured.<br />
The voltage drop is measured and the earth resistance is determined using a probe positioned by the ground reference of<br />
the earth electrode to be measured.<br />
The alternating current prevents influences through polarisation at the junction between the metal earth electrode and<br />
earth.<br />
Measurements can be undertaken according to the two- or three-wire measurement principle.<br />
Your benefits:<br />
| 5 year manufacturer's warranty<br />
| IEC/EN 61010-1 (DIN VDE 0411)<br />
SPECIFICATIONS<br />
Technical data<br />
Display<br />
Measurement ranges<br />
Resolution<br />
Measuring system<br />
Power supply<br />
Overvoltage category<br />
Dimensions<br />
Degree of protection<br />
Weight<br />
Colour<br />
Scope of delivery<br />
Testboy TV 440N<br />
3½ digit LC display<br />
Earth resistance<br />
20 Ω, 200Ω, 2000Ω ±2% +3dgts<br />
Earth voltage<br />
0 to 200V, 40 to 400Hz, ±1.5% +5dgts<br />
0.01Ω at 20Ω<br />
0.1Ω at 200Ω<br />
1Ω at 2000Ω<br />
Constant current, 2mA<br />
6x 1.5V<br />
CAT II 600V<br />
168 x 110 x 62 mm<br />
IP 40<br />
590 g<br />
Red, other colours on request<br />
1x operating instructions<br />
2x earth stakes<br />
1x test lead set<br />
6x batteries 1.5V AA LR06<br />
1x carry case<br />
RESISTANCE<br />
5<br />
Year<br />
Warranty<br />
51 |
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