ETCR 3000B - Technical Specifications; Base and Working Conditions; General Specifications

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II．Technical Specifications
1. Base Conditions and Working Conditions
Influence Quantity
Base
Condition
Working
Conditions
Remark
Ambient Temp
23℃±1℃
-10℃-40℃
----
Ambient Humidity
40%-60%
＜80%
----
Working Voltage
9V±0.1V
9V±1.5V
rC、rP
Auxiliary Earth
Resistance
＜100Ω
＜30kΩ
----
Interference Voltage
~
＜20V
----
Interference Current
~
＜2A
Electrode Distance
when measuring R
a＞5d
a＞5d
----
Electrode Distance
when measuring ρ
a＞20h
a＞20h
----
2. General Specification
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: 0.00Ω-30.00kΩ
Soil Resistivity: 0.00Ωm-9000kΩm
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
Distance Range
Can be set 1m-100m