Digital Earth Resistance Online Detector On-Line Monitoring Resistance Tester
Overview
Earth Resistance Online Detector is high-tech product that our company has devoted to "grounding resistance detection technology research" for more than ten years, Using precision 3-wire or simple 2-wire measurement method to test the grounding resistance. Adopt average value rectification method to test grounding voltage, online detection, real-time monitoring. User can select RS232 or RS485 communication, according the protocol MODBUS to secondary development, build network, realize remote multipoint online monitoring etc.
Earth Resistance Online Detector displayed by super large LCD, very clear and obvious. The alarm critical value can be set via the button, and with the sound and light alarm indication. Ensure the high accuracy, high stability and high reliability of real-time online monitoring of grounding resistance value in various place.
Earth Resistance Online Detector Tester suitable for transmission line tower grounding, underground mine equipment grounding , weather lightning protection grounding, petrochemical grounding ,communication base station grounding, power substation grounding , railway grounding , building warehouse grounding , electrical equipment grounding, etc.
Specification
Measurement Range & Accurancy
|
Measurement Function |
Range |
Accuracy |
Resolution |
|
Earth Resistance |
0.01Ω～20Ω
|
±2%rdg±3dgt (auxiliary earth resistance 100Ω±5%，Voltage to earth＜10V)
|
0.01Ω
|
|
0.1Ω～200Ω
|
±2%rdg±3dgt (auxiliary earth resistance 100Ω±5%，Voltage to earth＜10V)
|
0.1Ω
|
|
|
1Ω～2000Ω
|
±2%rdg±3dgt (auxiliary earth resistance 100Ω±5%，Voltage to earth＜10V)
|
1Ω
|
|
|
Earth Voltage |
0～600V AC
|
±2%rdg±3dgt
|
1V
|
(Note: 23℃±5℃，below 75%rh)
Technical Parameter
|
Function |
Description |
|
Measure Mode
|
Precise 3-wire measurement ,simple 2-wire measurement
|
|
Measure Method
|
Ground resistance：rated current change-pole method，measured current11mA Max，128Hz；
voltage to ground： average value ectification method.
|
|
Power Supply
|
Standard：12V±1VDC、400mA Max（provided externally） |
|
Weight
|
Detector:380g
|
|
Dimension
|
130mm×90mm×54mm
|
|
LCD Size
|
47mm×28.5mm
|
|
Measurement Time
|
Voltage to ground：about 2 times/second ; ground resistance : about 30 seconds/time
|
|
Measurement Rate
|
Over 10000 times
|
|
Monitoring Interval Time
|
Setting range of automatic monitoring interval time :1-999 h
|
|
Instrument Interface
|
Pluggable terminal blocks: 9 pin connector
|
|
Communication Method
|
RS485 or GPRS
|
|
Data Storage
|
99 groups，flash display “99” symbol indicate storage is full
|
|
Data Access
|
Data read function :“READ” symbol display
|
|
Overflow Display
|
Exceed measurement range overflow function :”OL” symbol display
|
|
Alarm
|
Audible and visible alarm
|
|
Power Supply Voltage
|
When power supply voltage decreases to about 10V , power supply low symbol will display, and remind to replace the power.
|
|
Overload Protection
|
Measurement ground resistance: E-P, E-C between each interfaces AC 280V/3 seconds
|
|
Electromagnetism
|
IEC61010-4-3,Wireless frequency electromagnetic field≤1V / m
|
|
Line Voltage
|
Measuring the voltage to ground: Below AC 600V
|
|
Accessories
|
Detector: 1PCS; GPRS Communication module+external antenna：1set（optinal），9P terminal block
|