The Metravi CAL-ER Earth and Ground Tester Calibrator is a specialized device designed for calibrating earth resistance meters and ground testers. This instrument is essential for ensuring the accuracy and reliability of devices used to measure the earth resistance, which is critical in grounding systems for electrical safety. It provides a stable and known resistance value for testing, allowing users to verify the calibration and accuracy of their earth and ground testers. Below are the detailed specifications and features of the Metravi CAL-ER:

Key Specifications:

• Model: CAL-ER
• Brand: Metravi
• Functionality: Calibrates earth resistance testers and ground resistance meters by providing precise reference resistance values.

Calibration Ranges:

• Resistance Values:
  • Typically includes a series of known resistance values for calibration, such as 10Ω, 25Ω, 50Ω, 100Ω, 250Ω, 500Ω, and 1000Ω.
  • These values ensure that earth resistance testers can be checked across a range of measurements, providing a thorough verification of accuracy.
• Output Precision: High accuracy output ensures that the calibration is reliable and conforms to the required standards for testing equipment.

Features:

• User-Friendly Interface: Simple and intuitive design allows users to select the desired resistance value quickly.
• Portable Design: Compact and lightweight, making it easy to carry and use in various environments, whether in the field or in a laboratory setting.
• Stable Output: Provides a stable resistance output to ensure consistent and repeatable calibration results.
• Durable Construction: Built with robust materials to withstand the demands of fieldwork and maintain accuracy over time.
• LED Indicators: Clear LED indicators show the selected resistance value for easy verification during the calibration process.

Power Source:

• Battery Operated: Typically powered by standard batteries, making it convenient for field use without needing external power sources.
• Low Battery Indication: Alerts the user when battery levels are low, ensuring uninterrupted calibration activities.

Safety and Compliance:

• Safety Rating: Designed to meet safety standards required for calibration equipment, ensuring safe use in various environments.
• Shock-Resistant Casing: Protects the internal components from damage during transport and field use.
• Operating Temperature Range: Suitable for a variety of conditions, allowing for reliable performance during outdoor or indoor use.

Physical and Design:

• Compact and Lightweight: Ergonomically designed for easy transport and handling.
• Color: Typically comes in a durable, professional-grade blue or black finish.
• Warranty: One year against manufacturing defects.

Applications:

The Metravi CAL-ER Earth and Ground Tester Calibrator is ideal for:

• Calibration Labs: Ensures that earth resistance and ground testers are operating accurately and within specified tolerances.
• Field Technicians: Portable design allows for on-site calibration, making it easy to verify testing equipment before use in the field.
• Electrical Contractors: Essential for those who install and maintain grounding systems, ensuring their testing tools provide accurate measurements.
• Utility Companies: Maintains the accuracy of earth resistance measurements critical for the safety and reliability of grounding systems in power distribution networks.