ETCR3000B Earth Resistance Tester Soil Resistivity Meter Voltage Testers ETCR-3000B
Influence Quantity
|
Base Condition
|
Working Conditions
|
Remark
|
Ambient Temp
|
23C±1C
|
-10C-40C
|
----
|
Ambient Humidity
|
40%-60%
|
<80%
|
----
|
Working Voltage
|
9V±0.1V
|
9V±1.5V
|
rC rP
|
Auxiliary Earth Resistance
|
<100?
|
<30k?
|
----
|
Interference Voltage
|
no
|
<20V
|
----
|
Interference Current
|
no
|
<2A
|
|
Electrode Distance when measuring R
|
a>5d
|
a>5d
|
----
|
Electrode Distance when measuring ?
|
a>20h
|
a>20h
|
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|
Function
|
Measurement of 2/3/4-pole earth resistance, soil resistivity, earth voltage, AC voltage |
Power Supply
|
DC 9V(Zi-Mn dry battery R14S 1.5V 6 PCS, continuous standby for 300 hours ) |
Measurement Range
|
Earth Resistance: 0.00?-30.00k? |
Soil Resistivity: 0.00?m-9000k?m | |
Measuring Mode
|
Precise 4-pole measurement, 3-pole measurement, simple 2-pole measurement |
Measuring Method
|
Earth Resistance: rated current change-pole method, measurement current 20mA Max
Soil Resistivity: 4-pole measurement (Wenner method)
Earth Voltage: average rectification(between P(S)-ES)
|
Test Frequency
|
128Hz/111Hz/105Hz/94Hz(AFC) |
Short-circuit Test Current
|
AC 20mA max |
Open-circuit Test Current
|
AC 40V max |
Test Voltage Wave
|
Sine wave |
Electrode DistanceRange
|
Can be set 1m-100m |
Shift
|
Earth Resistance: 0.00?-30.00k?, automatic shift |
Soil Resistivity: 0.00?m-9000k?m, automatic shift | |
Backlight
|
Blue screen backlight, suitable for dim places |
Display Mode
|
4-digital super-large LCD display, blue screen backlight |
Measuring Indicator
|
During measurement, LED flash indicator, LCD count down display, progress bar indicator |
LCD Frame Dimension
|
128mm×75mm |
LCD Window Dimension
|
124mm×67mm |
Dimension
|
L×W×H: 215mm×190mm×95mm |
Standard Test Wire
|
4 wires: each for red 20m, black 20m, yellow 10m, and green 10m |
Simple Test Wire
|
2 wires: each for red 1.6m and black 1.6m |
Auxiliary Earthing Rod
|
4 rods: ?10mm×150mm |
Measuring Rate
|
Earth voltage: about 3 times/second |
Earth resistance, soil resistivity: about 5 seconds/time | |
Measuring Times
|
Over 5000 times (Short-circuit test, interval time should be at least 30 seconds) |
Line Voltage
|
below AC 600V |
RS232 Interface
|
Possess RS232 interface, software supervision, storage data can be uploaded to computer, saved or printed. |
Communication Wire
|
One piece of RS232 communication wire, with length 1.5m |
Data Storage
|
300 sets, ?MEM? icon storage indicator, flash display ?FULL? icon to indicate storage is full |
Data Hold
|
Data hold function: ?HOLD? icon display |
Data Access
|
Data read function: ?READ?icon display |
Overflow Display
|
Exceeding measuring range overflow function: ?OL? icon display |
Interference Test
|
Recognize interference signal automatically, ?NOISE? icon display when interference voltage exceed 5V |
Auxiliary Earthing Test | Can measure auxiliary earth resistance, 0.00K?-30k?(100R+rC<50k?, 100R+rP<50k?) |
Alarm Function
|
When measuring value exceeds alarm setting value, there is ?Toot-toot-toot? alarm hint |
Battery Voltage
|
When battery voltage decreases to about 7.5V, battery voltage low icon will display, reminding to replace battery. |
Power Consumption
|
Standby: about 20mA (Backlight shut off) |
Boot and with backlight: about 45mA (25mA without backlight) | |
Measurement: about 100mA (Backlight shut off) | |
WorkingTemperature & Humidity
|
-10C-40C, below 80%rh |
Storage temperature & humidity
|
-20C-60C, below 70%rh |
Overload Protection
|
Measuring earth resistance: between each interfaces of C(H)-E P(S)-ES,AC 280V/3 seconds |
Insulation Resistance
|
Over 20M? (between circuit and enclosure it is 500V) |
Withstanding Voltage
|
AC 3700V/rms (Between circuit and enclosure) |