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Xtester-ETCR3040 Digital Ground Resistance Tester
Introduction
ETCR3040 Digital Earth Resistance Tester is specially designed and manufactured for earth resistance and earth voltage measurement on-stie, which adopts digital and micro-processing technology, measuring the earth resistance with precision 3-wire method or 2-wire method. The tester has the line resistance calibration function, which can avoid the errors caused by the test line not being fully inserted into the tester interface or poor contact, as well as the errors caused by the user replace or lengthen the test line, and make on-site low-value earth resistance measurement more accurate and reliable. The tester also has the auxiliary grounding pile alarm function, which can display the resistance value of the auxiliary grounding pile during testing, and the indicator light will show whether the auxiliary grounding pile is well grounded, avoiding the errors caused by excessive grounding resistance of the auxiliary grounding electrode. When testing the earth voltage, when the voltage larger than 36V will alarm to protect the safety of the operator. ETCR3040 Digital Earth Resistance Tester is composed of host machine and test wires etc. With automatic shutdown function, the tester full range automatic shift, strong anti-interference ability, and easier operation. It is widely used in measuring ground resistance of electric power, telecommunication, meteorology, oil field, construction, lightning protection and industrial electrical equipment |
1. Range & Accuracy
Measure Function | Range | Accuracy | Resolution |
Earth Resistance | 0.10Ω~20Ω | ±2%rdg±3dgt (Auxiliary earth resistance 100Ω±5%, Voltage to earth＜10V) | 0.01Ω |
0.1Ω~200Ω | 0.1Ω | ||
1Ω~2000Ω | 1Ω | ||
AC/ DC voltage | 0~300V AC/DC | ±2%rdg±3dgt | 1V |
(Note: 23℃±5℃, below 75%RH)
2. Technical Specification
Function | Measurement of earth resistance, earth voltage, DC voltage measurement |
Power Supply | DC 9V Alkaline dry battery (LR6 1.5VX6PCS) |
Display Mode | LED screen, Black text on white background |
LCD Dimension | display area:58mmX46mm |
Backlight | Controllable screen backlight, suitable for dim places |
Measuring Mode | Precision 3-wire measurement, simple 2-wire measurement |
Measuring Method | Earth Resistance: rated current change-pole method, AC/DC Voltage: Average rectification |
Test Frequency | 128Hz |
Short Circuit Test Current | AC 20mA max |
Auxiliary Pile Alarm | The R P(S)R C(H) OK indicator light can be used to avoid errors caused by excessive grounding resistance of the auxiliary grounding electrode. |
AC/ DC Voltage Alarm | When the voltage is greater than 36V, the Live circuit indicator light will flash and the buzzer will sound an alarm. |
Line Resistance Verification | To avoid errors caused by incomplete insertion of test wire into instrument interface or poor contact or replacement of extended test wire by users, which make the earth resistance measurement more accurate |
Meter Dimension | 183mm(L)X89mm(W)X56mm(H) |
Test Wires | 3 wires: each for red 15m, yellow 10m, and green 5m |
Simple Test Wire | Red 1.5m |
Auxiliary Ground Rod | 2PCS: Φ9mmX230mm |
Measuring Rate | Earth Voltage: about 2 times/s; . Earth resistance: about 5s/time |
Measuring Times | Over 5000 times (20Ω gear measure 10Ω, interval time should be at least 30 seconds) |
Overflow Display | Exceed measurement range overflow function: “OL” symbol display |
Battery Voltage | While battery voltage decreases to around 7.2V, will display battery voltage low symbol“ ”, and remind to replace the battery |
Working Current | Backlight: 56mA Max |
Standby: 20mA Max(Backlight shut down ) | |
Measurement: 200mA Max(Backlight shut off) | |
Weight | Tester: 510g |
Total weight: 2.37kg (with accessories) | |
Working Temperature & Humidity | -10℃-40℃, below 80%RH |
Storage temperature & humidity | -20℃-60℃, below 70%RH |
Overload Protection | Measure earth resistance: between each interfaces of E-P, E-C, AC 280V/3 seconds |
Insulation Resistance | Above 10MΩ (between circuit and outside shell is 500V) |
Withstand Voltage | AC 3700V/rms. (Between circuit and outside shell) |
Protection Type | IEC61010-4-3,IEC1010-2-31,IEC61557-1 Pollution degree 2, CAT Ⅲ 300V, JJG 366-2004 Ground resistance meter |
