The Ground Resistance Tester Model 4610 is available alone
or as a complete kit. The kit includes:
Meter
One 16 ft. color-coded lead
Two 100 ft. color-coded leads
Two 300 ft. color-coded leads on
reels
Four auxiliary ground electrodes
Molded hard carrying case
Batteries
User manual
Description
Digital Ground Resistance Tester Model 4610 performs ground resistance and
soil resistivity
tests. Direct reading tester measures from 10 mW to
1999W, and is autoranging, so it
automatically seeks out the optimum measurement range. Easy to use - simply connect the
leads, press to measure, and read.
The large LCD ( nearly 3/4" high) is easy to read, and also indicates low battery
status, over range, and test lead shorts and lead reversals. Three LED indicators on the
front panel continuously warn the user of measurement problems
to ensure accurate and reliable tests.
The Model 4610 is fuse protected up to 250VAC to protect the
instrument against voltage into the test leads. In the event of a system fault, it
can withstand 250VAC with spikes of 3000VAC or 1000VDC.
The heavy duty ABS case is O-ring sealed
against dust and water, and the push-to-measure button is also sealed. Model 4610 is
battery powered, for convenient user in remote field applications.
Mechanical and Safety specifications,
such as vibration and drop test, meet or exceed IEC standards, to ensure safe and reliable field use.
Applications
The Ground Resistance Tester Model 4610 is a rugged,
easy-to-use instrument ideal for maintenance crews performing
numerous tests.The Model 4610 is designed to reject high levels of interference, so it can
be used under difficult conditions such as high stray currents that normally affect
accuracy.
The Model 4610 may be used to
perform the following tests:
Three Point measurements of resistance to ground of
ground rods and grids. Three-Point measurements are generally used when the electrode or grid can be easily disconnected, if corrosion is suspected, or
in circumstances where ground faults are unlikely to occur.
Four-Point tests or soil resistivity
measurements .Locating areas of lowest soil resistivity is essential for achieving an
economical grounding installation.
Touch potential
measurements, an
alternative to 3-point tests in evaluating electrical safety. This test is
recommended when the ground cannot be disconnected, where ground faults are
highly likely to occur, or when the "footprint" of grounded equipment (the
outline of the part of equipment in contact with the earth) is comparable to the size of
the ground to be tested.
Two-point tests for continuity tests on bonding or
on pre-established grounds. This test is commonly performed in urban environments
where proper auxiliary electrode placement may be obscured by confined real estate.
Measurements are refernced against a good local ground conductor.
Specifications
ELECTRICAL
Measurement Ranges: 0 to 2000W
Measurement Range
0.00 to 19.99Ω
20.00 to 199.9Ω
200.0 to 1999Ω
Ranges
20Ω
200Ω
2000Ω
Resolution
10mΩ
100mΩ
1Ω
Test Current
10mA
1mA
0.1mA
Accuracy in % of Reading
±2%
Reading ±1 ct
±3% Reading ±3
cts
Accuracy Reference Conditions
23°C
±3K, 50% RH ±10%, battery at 8V ±0.2V, externa; magnetic field <40A/m, external
field <1 V/m, conductor centered, loop resistance noninductive. Accuracy % of
reading
Interference:
Model 4610 rejects high levels of interference voltage (DC, 50 to 60Hz,
harmonics); DC voltage in series with X:20V AC voltage in series with Y:13V peak AC
voltage in series with Z:32V peak
Response Time:
Approximately 6 seconds for a stabilized measurement
Voltage Withstand:
250VAC with spikes of 3000VAC or 1000VDC
Power Source:
Eight 1.5V "AA" batteries; Alkaline recommended;"LO BAT"
indication on LCD
Battery Life:
1800 15-second measurements
Fuse Protection:
High breaking capacity 0.1A, 250V, 0.25" x 1.25"
Mechanical Specifications
Display:
7-segment LCD, .71" (18mm) high
(3-1/2 digit); 2000 counts; LCD also indicates over range, test lead shorts and lead
reversals
Connection:
Color-coded terminals accept lugs with
min. gap of 6mm or standard 4mm banana jacks
LED Indication:
3 LEDs indicate high input noise, high
auxiliary rod resistance, open leads, blown fuse
Operating Temperature:
14° to 131°F (-10° to 55°C),0 to
90%RH
Storage Temperature:
-40° to 158° F (-40° to 70° C), 0 to
90% RH with batteries removed
Dimensions:
8.7 x 5.4 x 5.9" (220 x 136 x
150mm)
Weight:
2.9 lbs. (1.3kg)
Case:
Heavy-duty, ABS
Colors:
Case: safety yellow; Front panel: gray
Mechanical Shock:
IEC 68-2-27
Vibration Test:
IEC 68-2-6
Drop Test:
IEC 68-2-32
Dielectric Test:
3kV, 50/60Hz, 1 min. between four
interconnected measuring terminals and any external metal ground
Environmental:
O-ring sealed against dust and water
to IP50 (Protection Index)
