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MTS-122 Meter Test System

The MTS-122 is a high-precision, multifunctional three-phase Meter Test System designed for calibration and testing of a wide variety of equipment, including:

  • Analog and digital meters

  • RTUs (Remote Terminal Units)

  • Electrical transducers

  • Energy meters

With accuracy classes 0.05 and 0.1, modular structure, and a broad output range (AC & DC, up to 36A and 1000V/1100V), the MTS-122 is ideal for research institutions, calibration laboratories, utilities, and meter manufacturers.

Model Options

Key Features

  • Dual output capability: AC & DC voltage and current sources

  • Accuracy class 0.05% or 0.1%

  • Wide measurement scope:

    • AC Voltage: 300mV–1000V (single phase), 57.7V–660V (three phase)

    • AC Current: 2mA–30A (single phase), 0.2A–30A (three phase)

    • DC Voltage: 75mV–750V

    • DC Current: 100µA–30A

  • Full harmonic generation and analysis: 2nd–63rd harmonics

  • Rugged modular design with 8” TFT touch-screen interface

  • Self-protection and diagnostics: overload, short-circuit, open-circuit, amplifier failure detection

  • Interfaces: RS-232, RS-485, Ethernet, USB, WiFi, I/O

  • Remote firmware update and diagnosis

  • Automatic or user-defined calibration system supported

Technical Specifications

AC Large Voltage Output

  • Range: L1: 30V, 100V, 300V, 660V, 1000V; L2 & L3: 30V, 100V, 300V, 660V

  • Adjusting Range: 0–120% RG (1000V: 0–100% RG)

  • Resolution: 0.01%, 0.1%, 1%, 10% RG

  • Stability: 0.01%/2min (Class 0.05), 0.02%/2min (Class 0.1)

  • Distortion: ≤0.2%

  • Max Load: 20VA/phase

AC Small Voltage Output

  • Range (L1): 75mV, 300mV, 750mV, 3V, 7.5V

  • Adjusting Range: 0–120% RG

  • Stability: 0.02%/2min

  • Distortion: ≤0.2%

  • Load: ≥25mA

  • Accuracy: 0.1% RG

AC Current Output

  • Range: L1 (2mA–30A), L2/L3 (200mA–30A)

  • Adjusting Range: 0–120% RG

  • Stability: 0.01%/2min (Class 0.05), 0.02%/2min (Class 0.1)

  • Distortion: ≤0.2%

  • Load: 20VA (30A gear), ≥15V (50mA and below)

  • Accuracy: 0.05% RG (≥200mA), 0.1% RG (≤50mA)

DC Voltage Output

  • Range: 100mV–1000V

  • Adjusting Range: 0–120% RG (1000V: 0–100%)

  • Stability: 0.01%/2min (Class 0.05)

  • Ripple: ≤1%

  • Load: ≥50mA

DC Current Output

  • Range: 100µA–30A

  • Adjusting Range: 0–120% RG

  • Stability: 0.01%/2min (Class 0.05)

  • Ripple: ≤1%

  • Load: 25VA at 25A; ≥30V at ≤1A

Phase Output

  • Range: 0°–360°

  • Resolution: 0.01°

  • Accuracy: 0.05°

Frequency Output

  • Range: 40Hz–70Hz

  • Resolution: 0.001Hz

  • Accuracy: ±0.002Hz

Harmonics

  • Order: 2nd–63rd

  • Amplitude: 0–40%

  • Angle: 0°–359.99°

  • Error: ≤±0.1% (2nd–31st), ≤±0.2% (32nd–63rd)

Energy Error Measurement

  • Active Energy:

    • ±0.05% RD (V: 15–660V, I: 0.05–36A, PF ≥0.5)

    • ±0.1% RD (V: 15–660V, I: 0.02–0.05A, PF=1)

  • Reactive Energy:

    • ±0.1% RD (V: 15–660V, I: 0.05–36A, PF ≥0.5)

    • ±0.2% RD (V: 15–660V, I: 0.02–0.05A, PF=1)

Other Parameters

  • Power Supply: 90–265VAC/DC

  • Frequency: 50–60Hz

  • Consumption: 50–1000VA

  • Operating Temp: 20–30°C; Humidity ≤85% RH

  • Storage Temp: -20–50°C

  • Dimensions: 600 × 440 × 176 mm

  • Weight: 30kg

Unique Features

  • Integration of high-accuracy reference meter + power source

  • Capable of testing: meters, RTUs, transducers, and multifunction devices

  • Generates and analyzes harmonics (2nd–63rd)

  • Relay and pulse outputs for response time tests

  • Full self-diagnosis for amplifier and communication module failures

  • Supports testing of Class 0.2 meters and below using Class 0.05 system

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