TIS 570: Precision AC/DC Earth Leakage Clampmeter for Modern Installations

Identify and diagnose frustrating RCD tripping issues caused by both AC and DC earth leakage currents with the TIS 570. This high-accuracy clamp meter is an essential troubleshooting tool for electricians dealing with modern installations containing power electronics found in solar inverters, EV chargers, heat pumps, and variable speed drives.

Identify Hidden DC Leakage

Standard RCDs (Type AC) can be 'blinded' or fail to trip correctly if more than 6mA of DC leakage current is present. As highlighted by Test Instrument Solutions, many modern appliances and systems, including solar PV systems, can generate small amounts of DC leakage during normal operation or due to faults. The TIS 570 excels where other clamps may fail:

• High Resolution: Measures down to 0.1mA for both AC and DC currents, allowing detection of subtle leakage often missed by less sensitive meters.
• AC & DC Measurement: Unlike standard leakage clamps, the TIS 570 accurately measures both AC (True RMS up to 20A) and DC leakage (up to 10A), providing a complete picture of leakage currents.
• Accurate Diagnosis: Helps determine if nuisance tripping is caused by cumulative AC leakage, DC leakage impacting the RCD, or diverted neutral currents. This ensures the correct type of RCD (e.g., Type A, Type F, or Type B) is specified and installed for safety and compliance, especially important when considering different energy tariffs and system loads.

Versatile Electrical Testing

Beyond leakage detection, the TIS 570 is a capable multimeter for general electrical work. According to the instruction manual, it measures:

• AC Voltage (True RMS up to 300V)
• DC Voltage (up to 300V)
• Resistance (up to 500kΩ)
• Continuity Test (with audible buzzer)

Why Evergy Recommends This Product

The TIS 570 is a crucial diagnostic tool for ensuring electrical safety and reliability in installations featuring modern electronic equipment.

• Solves RCD Issues: Accurately identifies both AC and DC leakage, the key to resolving unexplained tripping.
• Ensures Correct RCD Selection: Provides the measurements needed to specify the appropriate RCD type (AC, A, F, B) for the load, preventing dangerous RCD blinding.
• High Accuracy & Resolution: Detects very small leakage currents critical for diagnosing issues with sensitive electronics like solar optimisers and meters.
• Multifunctionality: Combines essential leakage detection with standard multimeter functions.

Technical Highlights

Key specifications from the instruction manual include:

• AC Current (Leakage): 300.0mA / 3.000A / 20.00A (Resolution 0.1mA / 0.001A / 0.01A)
• DC Current (Leakage): 300.0mA / 3.000A / 10.00A (Resolution 0.1mA / 0.001A / 0.01A)
• AC/DC Voltage: 50V / 300V
• Jaw Opening: 23mm
• Safety Rating: CAT IV 300V

For full details, please see the instruction manual PDF.

What's Included?

As per the instruction manual:

• TIS 570 Clamp Meter
• Carrying Case
• Test Leads
• Batteries (2 x 1.5V AAA)
• Instruction Manual

Ensure Electrical Safety and Compliance

Don't guess when it comes to earth leakage. Equip yourself with the TIS 570 for accurate AC and DC leakage diagnostics. Essential for working with solar inverters, solar batteries, and other modern electrical loads. Contact us if you have any questions.