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EARTH RESISTIVITY METER AZA0890
The AZA0890 Earth Resistivity Meter from Azalab is a professional-grade instrument designed for accurate measurement of earth resistance, soil resistivity, and earth voltage. Built in compliance with ASTM G57, this meter is essential for electrical grounding design, geotechnical investigations, safety audits, and installation verification.
Engineered for field reliability, the AZA0890 offers multiple resistance ranges, earth voltage detection, and safety-focused low-current testing—making it suitable for both new installations and live system inspections.
Description
Key Features & Benefits
ASTM G57 Compliant
Designed in accordance with ASTM G57 guidelines for soil resistivity testing, ensuring standardized and dependable results for grounding system design.
Wide Earth Resistance Measurement
Selectable resistance ranges allow precise testing across varying soil and grounding conditions:
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0–20 Ω
-
0–200 Ω
-
0–2000 Ω
Earth Voltage Measurement
Measures earth voltage up to 200V AC (40–500Hz), enabling users to detect live voltage on grounding systems before resistance testing.
Low Test Current (2mA)
Uses a safe 2mA measuring current, preventing nuisance tripping of ELCBs/RCCBs, even during testing on live installations.
Auto Power-Off
Smart energy-saving function automatically switches the unit off 3–5 minutes after test activation.
Data Hold Function
Allows readings to be frozen on the display for easy recording in field conditions.
Portable & Field-Ready
Compact, lightweight design ensures easy handling and transport in industrial, construction, and remote site environments.
Battery Operated
Operates independently without external power—ideal for on-site testing.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | AZA0890 |
| Standard Compliance | ASTM G57 |
| Earth Resistance Ranges | 0–20Ω / 0–200Ω / 0–2000Ω |
| Earth Voltage Range | 0–200V AC (40–500Hz) |
| Measuring Current | 2mA (ELCB safe) |
| Display | Digital LCD |
| Power Supply | Battery operated |
| Auto Power-Off | Yes (3–5 minutes) |
| Data Hold | Yes |
| Safety Rating | IEC 1010, CAT III 200V |
| Calibration | Factory calibrated with test leads |
| Construction | Compact, lightweight housing |
Applications
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Soil resistivity measurement (Wenner method)
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Grounding system design and validation
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Electrical installation inspection
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Lightning protection testing
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Industrial safety audits
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Power distribution maintenance
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Telecom and substation grounding checks
Frequently Asked Questions (FAQ)
Q1: What is ASTM G57 used for?
ASTM G57 provides guidance for measuring soil resistivity using standardized methods essential for grounding system design.
Q2: Can AZA0890 be used on live systems?
Yes. The 2mA test current avoids tripping most earth leakage circuit breakers.
Q3: What voltage range can it measure?
It measures AC earth voltage from 0–200V within 40–500Hz.
Q4: Is recalibration required after purchase?
No immediate recalibration is needed. Annual recalibration is recommended for accuracy assurance.
Q5: Are test leads included?
Yes. The unit is supplied with test leads and delivered factory calibrated.
AZA0890 – Accurate, Safe & Standard-Compliant Earth Resistivity Testing
A dependable Azalab solution for professionals demanding precision, safety, and field reliability.
Related products
LINEAR SHRINKAGE MOULD AZA0850
The AZA0850 Precision Linear Shrinkage Mould from AZALAB is a compact and highly accurate laboratory instrument designed for determining the linear shrinkage of fine-grained cohesive soils in accordance with BS 1377-2. This test is a key component of soil classification and is especially important in identifying shrink–swell behavior of clays and expansive soils.
Linear shrinkage testing measures the reduction in length of a soil specimen upon drying, expressed as a percentage of its original length. The results provide valuable insight into soil expansiveness, volume stability, and suitability for foundations, pavements, and earthworks.
Manufactured from high-quality brass or stainless steel, the AZA0850 mould offers precise internal dimensions, excellent corrosion resistance, and a smooth polished finish for easy sample preparation and removal. Its robust construction ensures repeatable, reliable results even under high-frequency laboratory use.
LIQUID LIMIT DEVICE WITH COUNTER AZA0853
The AZA0853 Liquid Limit Device with Counter from AZALAB is a precision-engineered instrument used for determining the liquid limit of soils in accordance with the Casagrande method. This test is a fundamental component of soil classification and geotechnical investigation, providing critical insight into the plasticity, compressibility, and shear strength of fine-grained soils.
Designed for reliable, repeatable, and standardized testing, the AZA0853 is widely used in geotechnical laboratories, civil engineering departments, construction quality control labs, and academic institutions.
Principle of Liquid Limit Test (Casagrande Method)
The liquid limit is defined as the water content at which soil transitions from a plastic state to a liquid state. In practice, it is determined as the moisture content at which a standard groove cut in the soil sample closes over a length of 12.5 mm under 25 blows of the liquid limit apparatus.
The AZA0853 consists of a polished brass cup mounted on an adjustable bracket. The cup is repeatedly raised and dropped from a fixed height of 1 cm onto a hard rubber base by means of a manually operated cam mechanism. A built-in mechanical counter accurately records the number of blows, ensuring compliance with testing standards and reducing operator error.
PARTICLE SIZE SEDIMENTATION (HYDROMETER METHOD) AZA0857
POCKET PENTROMETER AZA0869
- Estimation of UCS and shear strength of soft to stiff cohesive soils
- Field classification of soil consistency
- Pre-construction soil stability checks
- Trench safety and shallow foundation planning
- Geotechnical education and field research
SOIL CONE PENETROMETER AZA0851
Principle of Operation
A soil paste prepared at a known moisture content is placed in the sample cup. The stainless steel cone, of specified mass and angle, is allowed to penetrate the soil freely for 5 seconds. The depth of penetration (up to 20 mm) is measured using a precision depth gauge. The moisture content corresponding to 20 mm penetration is defined as the liquid limit of the soil.Standards Compliance
- IS 2720 (Part 5) – Determination of liquid and plastic limits
- ASTM D4318 – Liquid Limit, Plastic Limit, and Plasticity Index of Soils
STANDARD COMPACTION TEST AZA0863
STANDARD COMPACTION TEST AZA0864
The AZA0864 Standard Compaction Test Apparatus from Azalab is precision-engineered to perform the British Standard Proctor (Light Compaction) Test, as specified in BS 1377-4 and BS 1924-2. This apparatus is used to determine the Maximum Dry Density (MDD) and Optimum Moisture Content (OMC) of soils subjected to light compactive effort.
The test simulates field compaction achieved by light rollers and rammers and is essential for quality control of subgrades, embankments, road bases, and foundation soils. The AZA0864 is widely used in geotechnical laboratories, site investigation works, and academic institutions following British Standards.
WATER LEVEL INDICATOR AZA0871
The AZA0871 Water Level Indicator from Azalab is a high-precision electronic instrument designed for accurate measurement of groundwater levels in boreholes, wells, standpipes, and observation tubes. It is an essential tool for professionals involved in groundwater monitoring, environmental site assessments, hydrological investigations, geotechnical projects, and dewatering operations.
Accurate water level measurement is fundamental for understanding aquifer behavior, monitoring seasonal or pumping-induced fluctuations, assessing contamination plumes, and supporting the design of foundations, irrigation systems, and water resource management plans. The AZA0871 provides a reliable, fast, and field-ready solution for both static and dynamic water level measurements.
