1. Characteristics
Double-clamp multi-function ground resistance tester is also called double-clamp ground resistance tester. It is an advanced ground resistance tester that integrates multiple measurement methods. In addition to the traditional function of using an auxiliary earth electrode to measure ground resistance, the instrument also has the unique function of measuring without auxiliary earth electrode. It uses a large gray-white screen backlight display and microprocessor technology to control the precision line method, line method and simple line method, selection method, and double clamp method to measure ground resistance testing through the microprocessor. The large-diameter current clamp design uses double-jaw measurement technology to achieve online measurement without the need to install an auxiliary ground electrode or to isolate the ground body from the equipment. Widely used in telecommunications, electric power, meteorology, computer rooms, oil fields, power distribution lines, tower transmission lines, gas stations, factory grounding grids, lightning rods, etc. The instrument has the characteristics of accurate testing, fast, simple, stable and reliable.
The double-clamp multifunctional ground resistance tester is controlled by a microprocessor and can accurately detect ground resistance, soil resistivity, ground voltage, DC resistance and AC current. It uses fast filtering technology to minimize interference. The resistance value of the auxiliary electrode is displayed on the same screen to facilitate the judgment of measurement errors caused by environmental factors and to more accurately measure the true resistance of the ground. At the same time, the storage group data can be uploaded through the monitoring software for online monitoring data B and has unique functions such as value retention and intelligent alarm prompts.
The double-clamp multifunctional ground resistance tester consists of a host computer, monitoring software, test wires, B wires, and grounding pins. It has the functions of reading, viewing, saving, reporting, and printing historical data.
2. Technical specifications
. Range and accuracy
Measuring function: r
Measuring range: r
Accuracy: r
Resolution
2 Three- and four-wire method for measuring ground resistance (R): r
.&;～.&;:r
&;%r&;(Note):r
.&;
:r
.&;～.&;:r
&;%r&;:r
.&;
:r
&;～&;:r
&;%r&;:r
&;
:r
.&;～.&;:r
&;%r&;:r
&;
DC resistance (R&;):r
.&;～.&;:r
&;%r&;:r
.&;
:r
&;～&;:r
&;%r&;:r
&;
:r
.&;～.&;:r < br/>&;%r&;:r
&;
Selective method to measure ground resistance (R):r
.&;～.&;:r
&;% r&;(Note):r
.&;
:r
.&;～.&;:r
&;%r&;:r
.& ;
:r
&;~&;:r
&;%r&;:r
&;
Measuring ground resistance (R) with double clamp method: r
.&;～.&;:r
&;%r&;:r
.&;
:r
.&;～.&;:r
.&;
:r
&;~&;:r
&;
Soil resistivity (&r;):r
.&; ~.&;:r
&r;
&;(Note):r
.&;
:r
.&;~.&;:r < br/>.&;
:r
&;~&;:r
&;
:r
.&;~.&;:r
&;
:r
.&;~.&;:r
&;
:r
&;~&;:r
&;
Ground voltage: r
.～.:r
&;%r&;:r
.
AC current: r
.～: r
&;%r&;:r
.
Note:. Base condition: Accuracy at R&;&;.
Working conditions:
&;+R＜&;;
&;+R＜&;
. Depends on the measurement accuracy of R&;
. ~；
． General specifications
Function: r
Ground resistance, soil resistivity, DC resistance, ground voltage, AC current,
Ambient temperature and humidity: r
℃&;℃%r or less< br/> Interference voltage: r
＜ (should be avoided)
Interference current: r
＜ (should be avoided)
Electrode spacing when measuring R: r
＞< br/>Measurement time electrode spacing: r
＞
Power supply: r
. Lead-acid battery continuous standby for more than one hour
Backlight: r
Controllable backlight is suitable Use in dark places
Measurement method:r
Precision four-wire, three-wire method measurement, simple two-wire, selection method, double clamp method to measure ground resistance
Measurement method:r
Two three four Line method measurement: changing pole method to measure current
Soil resistivity: four-pole method
Selective method measurement: changing pole method to measure current
Double clamp method: non-contact mutual inductance measurement method to test current
/> DC resistance: pole change method
AC current: average value rectification (clamp)
Ground voltage: average value rectification (-between interfaces)
Test voltage waveform: r
Sine wave
Test frequency: r
Short circuit test current: r
Open circuit test voltage: r
Electrode spacing range: r
～
Display mode: r
Extra large display with backlight
Measurement indication: r
Flashing indication during measurement
Size: r
&;
Display area: r
&;
Meter size: r
Length, width and height: .&;.&;
Current clamp size: r
Length, thickness and height: &;&;
Test Lines: r
: red, black, yellow and green each
Simple test line: r
: yellow, green, each
Auxiliary grounding rod: r
：&;&;
Current clamp: r
Handle: banana plug
Current clamp diameter: r
&;
Current clamp lead: r
Length
Measurement time: r
AC current: approximately times/second
Voltage to ground: approximately times/second
Ground resistance, soil resistivity: approximately seconds/second
Line voltage: r
The following measurements (the ground voltage measurement function cannot be used to measure commercial electricity)
B interface: r
It has a B interface to store data and can upload it to the computer through software
Communication Line: r
B communication line length.
Data retention: r
&; symbol indication when retaining data
Data storage: r
Group &; storage indication display& ; symbol indicates that the storage is full
Data query: r
&;R symbol indication when querying data
Overflow display: r
&; symbol indication when over-range and overflow
Current clamp low current indication: r
During selection method or double clamp method measurement, the & symbol is displayed when the received current signal is lower than. At this time, the clamping direction of the current clamp should be checked
Interference test: r < br/>Automatically identify interference signals when the interference voltage is higher than the &; symbol indication
Auxiliary ground test: r
Has the auxiliary ground resistance value test function.&;~.&;(
&; +R＜&;;
&;+R＜&;)
Alarm function: r
An alarm prompt will be issued when the measured value exceeds the alarm setting value
Battery voltage: r < br/>Real-time display of battery power and reminder to charge in time when the battery voltage is low
Automatic shutdown: r
&; Automatically shut down after a few minutes of power on
Power consumption: r
Standby (backlight off) )
:r
Power on and turn on the backlight
:r
Measurement (backlight off)
Quality: r
Instrument (including battery)
: r
Current clamp: (hand)
:r
Test wire: (including simple test wire)
:r
Auxiliary ground rod (one)
Working temperature and humidity: r
-℃～℃; below %r
Storage temperature and humidity: r
-℃～℃; below %r
Overload protection: r
Measure the ground resistance -, - between each port/second
Insulation resistance: r
&; above (between the circuit and the casing)
Withstand voltage: r
/r (between the circuit and the casing) Between shells)
Electromagnetic characteristics: r
()
Compatible safety regulations: r
- (III, , pollution degree); -;
- (Ground resistance );
-(soil resistivity);
-(ground resistance meter);
-(clamp type ground resistance meter).
3. Packing list
Meter: r
Stand
Meter bag: r
each
Auxiliary grounding rod: r
one
/> Standard test lines: r
(red rice; black rice; yellow rice; green rice)
Simple test lines: r
(yellow rice; green rice)
Lead-acid battery (built-in): r
pieces
Charger: r
pieces
Monitoring software CD: r
copies
B communication Line:r
Bar
User Manual:r
Copy
ES3002 Intelligent Ground Resistance Detector