Digital phase meter SMG2000B

multifunctionfor cables

Overview
SMG2000B is a handheld dual‑channel digital phase meter for on‑site measurement of AC voltage, AC current and phase relationships (U‑U, I‑I, U‑I). It uses clamp‑type current transformers for current input and provides isolated dual voltage inputs to avoid short circuits during phase checks.

Key features

• Dual‑clamp (two current clamps) design with isolated dual voltage inputs for safe phase measurement between voltages and/or currents.
• Measures phase, phase sequence, AC voltage, AC current and AC leakage current; discriminates transformer groups and inductive/capacitive circuits.
• Clamp current input requires no line disconnection; U1‑U2 measurement performed with insulated inputs to prevent shorting.
• Large high‑contrast LCD with up to 25 mm characters and adjustable viewing angle (~70°); white backlight for low‑light conditions.
• Practical functions: data hold (HOLD), automatic power‑off, battery voltage warning.

Reference to working conditions

• Benchmark ambient temperature: 23℃ ±1℃; operating range: 10℃–40℃; relative humidity <80% RH.
• Benchmark ambient humidity: 40%–60%.
• Signal waveform (benchmark): sine wave, β = 0.05; frequency benchmark 50 Hz ±1 Hz; operating 45–65 Hz.
• Instrument operating voltage benchmark: 9V ±0.1V; operating tolerance: 9V ±1V.
• Amplitude required for phase measurement: voltage benchmark 100V ±20V (working 30V–500V); current benchmark 1A ±0.2A (working 10mA–20.00A).
• Avoid strong external electric and magnetic fields; place measured conductor near clamp jaw centroid.

General specifications

• Model: SMG2000B. Power supply: DC 9V (6 × 1.5V LR6 alkaline cells).
• Display: LCD with white backlight; LCD size 70 mm × 62 mm; display area 64 mm × 54 mm; text up to 25 mm.
• Instrument dimensions: 196 mm × 92 mm × 54 mm; main unit mass ≈1140 g (with battery); each clamp ≈170 g; test leads ≈250 g.
• Sample rate: ≈3 readings/second.
• Measurement ranges: AC voltage 0–20V / 200V / 500V; AC current 0–200mA / 2A / 20A; Phase 0–360°.
• Amplitude ranges during phase measurement: U1‑U2 30V–500V; I1‑I2 10mA–10.00A; U‑I combinations 10V–500V and 10mA–10.00A.
• Data hold: press HOLD to freeze display ("DH" indicated). Auto power‑off: ≈15 minutes of inactivity.
• Battery replacement advised when battery voltage < 7.8–8.0V.
• Test lead length: 1.5 m; current clamp wire length: 2 m.

Accuracy & performance

• Voltage resolution/accuracy: 20V → 0.01V; 200V → 0.1V; 500V → 1V. Accuracy: ±(0.5% of range).
• Current resolution/accuracy: 200mA → 0.1mA; 2A → 1mA; 20A → 10mA. Accuracy: ±(0.5% of range).
• Phase: 0–360° display, resolution 1°; accuracy ±1° (benchmark conditions).

Safety & insulation

• Withstand voltages: between voltage input and case 500V/50Hz AC (1 min); between clamp core/handle/secondary 1000V/50Hz AC (1 min); between two voltage inputs 500V/50Hz AC (1 min).
• Insulation resistance: ≥10 MΩ between circuits and enclosure and between two voltage inputs.
• Structure: double insulation; input impedance: voltage ranges ≈1 MΩ (U1‑U2 mode 40 kΩ).