The Digital Ground Resistance Tester Model 4500 is designed for measuring very low resistance on large grounding systems, such as ground grids and ground mats.
It rejects high levels of interference voltages at DC or 60Hz and its harmonics, and can be used under difficult conditions such as high stray currents or excessive auxiliary electrode
resistance without substantially affecting accuracy.
The Model 4500 has three selectable test current ranges (2, 10, 50mA) and five selectable resistance testing ranges (2?, 20?, 200?, 2000? and 20k?). It is capable of direct readings with a resolution as low as 1m?.
With such a wide resistance capability, the Model 4500 is capable of measuring the resistivities of soil and other materials from below 10m?-cm to over 1M?-cm.
Readings are displayed on a large(0.71"), 31/2 digit LCD. The LCD blinks and a pointer on the display lights to warn of excess stray current or auxiliary electrode resistance, or when there is a lack of continuity between leads and electrodes. A beeper will notify the
user if voltage greater than 20 volts peak is present between terminals X (C1) and Y (P2) or X and Z (C2) when the ground leads are connected.
The instrument is fuse protected up to 500AAC to protect the instrument against voltage into the test leads.
Power is supplied by a rechargeable 12V battery; the tester may also be operated from an external 12VDC supply. A battery charge indicator and low battery indicator appear on the LCD and a dual-voltage charging unit is built into the instrument.
The heavy-duty, safety yellow case is dust and water resistant to ensure reliable field use. The cover may be detached while the meter is in use, if desired. Optional test kits are
available for ground resistance and soil resistivity tests.
¢ Fall-of-Potential method
¢ Measure ground resistance (2- and 3-Point) and soil resistivity (4-Point)
¢ Step voltage tests and touch potential measurements
¢ Selectable: three test currents and five resistance ranges
¢ Measure very low resistance on large grounding systems and grids
¢ High test current also enables geological surveys
¢ Large LCD display for easy reading
¢ Display includes indicators for excess stray current and voltage, high auxiliary rod resistance and fault connection.
¢ Battery (rechargeable) powered or external 12VDC
¢ Rugged dustproof and rainproof case
You are guaranteed to receive next day UK delivery to your door when ordering from Inlec. All confirmed weekday orders placed before 3:00 pm will be delivered to you the next day before 12 noon, guaranteed. If you do not receive delivery by the requested delivery time we will refund your delivery charge in full.
Deliveries are made through our own delivery vehicles and by National Couriers.
Next day delivery is our standard service however, please enquire for any of the following which we will endeavour to provide at extra cost:
·pre 9am or pre 10:30 delivery
·Saturday or Sunday delivery
·Same day delivery
In addition to nationwide delivery we also ship to EU and worldwide, please call our Customer Services team on our freefone number above for prices.
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