|
|
ERICO
ERITECH®
Earth / Ground
Resistance Tester Kits
A complete range of Ground / Earth Resistance
Testers
|
Applications
ERICO® Inc.
along with LEM Instruments Inc. are pleased to offer a complete
range of Ground / Earth Resistance Testers to meet the
requirements of every user. The units are lightweight and
portable for ease of use in the field. Their robust design and
splash-proof construction help them withstand extreme
conditions. The units' large LCD display shows required test
connections and features a complete automatic test sequence for
selected operations.
Three units are offered in the range. No matter what the
application, there is sure to be an Earth Tester suited to fit
your many diverse ground/earth measuring needs.
 1.
Eritech ST101
 2.
Eritech EST201
 3.
Eritech EST301
-
2-pole resistance
and 3-pole ground/earth resistance measurements @94/105/111/128
Hz.
-
4 pole resistance
measurement for determining soil resistivity.
-
Clamp-on
selective and stakeless measurement capabilities with clamp for
systems that are permanently bonded using CADWELD®
exothermically welded connections.
-
Complete kit
includes: Test instrument, four 14" ground stakes, three cable
reels (2 x 82 ft, 1 x 164 ft), three test leads, two alligator
clips, Pelican case, neck strap, six 1.5V batteries, Grounding
Tutorial Book, and Standard Operators Manual.
 4.
Eritech EST401
- Fast and
simple clamp-on operation for resistance or current measurement.
- Requires no
leads, auxiliary rods or spacing requirements.
- Direct
ground resistance readings from 0.1 to 1200 ohms.
- Ground
leakage or phase current readings from 1 mA to 30A rms.
- Supplied
with carrying case, battery and user's manual.
- See
Eritech EST401 web page.
All Units Include:
-
Large, high
contrast liquid crystal display with easy-to-understand
graphics and symbols.
-
Microprocessor control to automate the measuring process.
-
Lightweight
and portable for ease of use in the field.
-
Automatic
recognition of connection of measuring leads and their
connections to earth.
|
Specifications,
EST101, EST201, EST301
|
| |
EST101 |
EST201 |
EST301 |
|
Physical
and Operating Characteristics |
| Display |
3½ digit LCD, 0.6" |
4 digit LCD, 0.6" |
|
Measuring rate |
2/sec |
4/sec |
| Dimensions
(WxLxD) |
4.4" x
8.5" x 2.1" |
9.5" x 7.1" x 4.3" |
| Weight,
no accessories |
2.2 lbs |
3.3 lbs |
| Battery
type |
9V alkaline |
6 x 1.5V alkali-mangan
(or zinc-carbon) |
| Operating
temp. |
14ºF
to 122ºF |
14ºF to 122ºF |
| Safety
class |
Class II per IEC 1010
300V Cat. II |
|
Resistances
Measurement (2-pole) & Earthing Resistance (3-pole) |
|
Measuring method |
Current and voltage
measurement |
|
Full scale ranges |
0-19.99, 20-199.9,
200-1999 ohm |
0.020-299.9 kohm |
|
Resolution |
0.01, 0.1, 1 ohm |
0.001-100 ohm |
|
Measuring
frequency |
128 Hz |
94/105/111/128 Hz,
switchable
or automatic frequency control (AFC) |
|
Open circuit
voltage |
25 Vac |
20/48 Vac, switchable |
|
Short circuit
current |
40 mA (ac) |
250 mA (ac) |
|
Limits of error |
± 6%
of reading ± 5d |
± 2%
of reading ± 2d |
|
Earthing
Resistance Measurement |
|
Soil resistivity
(ohm-m) |
r = 2 π a RE (a =
distance between probe in meters,
RE = earthing resistance) |
|
Measuring method |
Current and voltage
measurement |
|
Display range |
0.001-2999 ohm |
|
Resolution |
0.001-1 ohm |
|
Limits of error |
± 2% of reading ± 2d |
|
Max overload |
250 V |
|
Noise
Voltage Measurement (AC/DC) |
| Measuring
method |
Mean value rectification
of AC, calibrated for
RMS, greater of AC or DC displayed |
|
| Display
range |
0.0-30.0V |
0.0-50.0V |
| Resolution |
0.1V |
0.1V |
| Limits
of error |
± 6%
of reading ± 5d |
± 5%
of reading ± 5d |
| Max
overload |
250V |
250V |
|
Selective
Earthing Resistance with Supplementary Current
Transformer |
| Measuring
method |
|
|
Voltage with probes.
Current with probes
or transformer. |
| Display
range |
0.001-29.99 kohm |
| Resolution |
0.001-10 ohm |
| Limits
of error |
± 7%
of reading ± 2d |
|
Part
Number |
Description |
|
EST101 |
Handy Earth/Ground
Tester, 2-pole resistance; 3-pole ground resistance
measurements
@ 128 Hz. |
|
EST201 |
Earth/Ground System
Tester, 2-pole AC resistance; 3-pole ground
resistance measurements,
4-pole soil resistivity. |
|
EST301 |
Universal Earth/Ground
System Tester, 2-pole (AC/DC) 4-pole (DC)
resistance, 3-pole ground/earth resistance, 4-pole
soil resistivity, selective clamp-on and stakeless. |
|
EST401 |
Clamp-on Ground
Resistance Tester and AC RMS Current Meter. Ground
resistance readings from 0.1 to 1200 ohms. Ground
leakage or phase current readings from 1 mA to 30A
rms. |
|
