1. Characteristics
Digital ground resistance tester, also known as three-wire ground resistance tester, ground resistance meter, etc., is a commonly used instrument for testing and measuring ground resistance. It adopts an extra large gray screen backlight display and microprocessor technology. Meets the resistance requirements for second- and third-wire testing. Suitable for telecommunications, electric power, meteorology, computer rooms, oil fields, power distribution lines, tower transmission lines, gas stations, factory grounding grids, lightning rods, etc. Instrument testing is accurate, fast, simple, stable and reliable.
The digital ground resistance tester is controlled by a microprocessor and can automatically detect the connection status of each interface and the interference voltage and interference frequency of the ground network. It also has the function of testing the resistance value of the auxiliary ground electrode <> Displaying the measured ground and auxiliary ground on the same screen The ground resistance value is clear at a glance. At the same time, the group data is stored. Resistance measurement range: .&;~&; Ground voltage range: ~. B data can be uploaded online through the monitoring software and has unique functions such as value retention and intelligent alarm prompts.
The digital 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. Measuring range and technical specifications
r
rGround resistance measuring range
&;~<>&Accuracy&;.%r& ;
rGround resistance resolution
&;
rGround voltage range
~<>Accuracy&;.%r&;
rGround voltage resolution
rReference conditions
℃&;<>℃%r or less (auxiliary ground resistance&;&;% to ground voltage< )
rFunction<>
Ground resistance measurement to ground voltage measurement Low value resistance measurement<>
rPower supply<>Lead-acid Continuous battery standby<>more than hours
rBacklight<>r
Controllable gray and white screen backlight suitable for use in dark places<>
rMeasurement method
Precision three-wire measurement, simple two-wire measurement
rMeasurement method
Ground resistance: rated current pole change method<>;
Voltage to ground: average rectification
< br/>rWire resistance calibration
Avoid errors caused by the test wire not being fully inserted into the instrument interface or poor contact or the user replacing the extended test wire, making the ground resistance measurement more accurate.
rDisplay mode
Extra large bits<>Display gray screen backlight
rMeasurement indication
Measuring<>Flashing indication countdown display
r
Dimensions
&;<>
rInstrument size
Length, width and height: <>.&;.&;
rTest line length
Bars: Red<>Yellow and Green. Each bar
rSimple test line
Bars: Yellow<>. Green. Each bar
rAuxiliary grounding rod
Root: &;<>&;
rMeasurement time
Voltage to ground: approximately <> times/second; grounding resistance: Approximately seconds/times
rMeasurement times
More than times
rLine voltage
Measure the voltage to ground:<>The following measurements
< br/>rB
Interface
It has <>B interface software to monitor and store data, which can be uploaded to the computer, saved and printed
r communication line
B communication line<> length.
rData storage
Group&;<>Storage indication displays &; symbol indicates that the storage is full
rData review
Data review function:& ;<>R symbol display
r overflow display
Over-range overflow function: &;<>Symbol display
r alarm function
The measured value exceeds Alarm prompts when the alarm set value
rBattery voltage
Real-time display of battery power reminds you to charge in time when the battery voltage is low
rAutomatic shutdown
& ;<>Indicates automatic shutdown after powering on for minutes
rPower consumption<>
Standby<> (backlight off)
Turn on the backlight<>
Measurement: <> (backlight off)
rQuality<>
Instrument: <> (including battery)
Test line: <> (including simple test Wire)
Auxiliary ground rod: <> (root)
Instrument bag: <>
rWorking temperature and humidity
-℃～<>℃; below %r
rStorage temperature and humidity
-℃～<>℃; %r or less
rOverload protection
Ground resistance: <>-, - each Inter-port/second
rInsulation resistance
&;Above<>(between circuit and case)
rWithstand voltage<>Voltage
/r (Between the circuit and the casing<>)
rElectromagnetic characteristics
Radio frequency electromagnetic field&;<>
rSuitable for safety regulations
-,< >, -, (), pollution, etc., III
3. Packing list
r
rInstrument
Station
rInstrument bag
Individual
rAuxiliary grounding rod
Root
rMonitoring software CD
copies
rB
communication lines
strips
r test lines
strips (red<>yellow Green each bar)
rSimple test line
Bar (yellow<>. Green. Each bar)
r
Battery (built-in)
/>Personal
rCharger
Individual
rManual, Warranty Certificate
Case
ES3000 digital ground grid ground resistance detector