HF-MT-503 Meter Wiring Tester

Overview of HF-MT-503 Meter Wiring Tester

Low‑voltage metering relates to electricity billing for every residential end‑user. Nevertheless, wiring errors still exist within the last‑100‑meter segment of residential distribution networks. Segmented authority management may cause mismatches between energy meters and end‑users, resulting in increased customer complaints for power grid operators.

Based on abundant field experience and proprietary technical capacity, our company has developed this user‑meter wiring identifier to solve the above‑mentioned problems.

The instrument consists of a master unit and slave unit(s).

The master unit transmits power‑line carrier signals and detects current pulse signals. It judges the position of each slave unit according to its incoming electrical parameters and captured current pulse signals.

Each slave unit receives power‑line carrier signals from the master unit, outputs pulse current on demand, receives response messages from the master unit, and displays feedback data.

Features of Meter Wiring Tester

• Adopts power, current and phase discrimination technology for live‑line on‑site testing without power cut‑off.
• Verifies the correspondence among single‑phase energy meters, end‑user loads and switches.
• Standard configuration includes three 5 A current clamps; clamp meter measuring ranges can be extended as required.
• Large‑screen LCD with Chinese display for simple configuration and operation.
• Supports multiple configurable slave units for parallel testing to boost working efficiency.
• High‑speed DSP processor; capable of measuring voltage, current, power, unbalance degree and line voltage drop.
• Built‑in multi‑layer protection circuits to guarantee operational safety.

Technical Specifications

Item	Specifications
Communication Mode	FSK 127 kHz power‑line carrier; baud rate: 100 BPS; communication distance: 2.5 km
Current Test Distance	≥5 km
Operating Voltage	AC220V±10%
Voltage & Current Measurement Error	±1% F.S.
Master Unit Power Consumption	≤30 VA
Current‑clamp Jaw Diameter	7 mm(5A), 50 mm(100A/500A)
Operating Ambient Temperature	‑30 ℃ ~ 70 ℃
Operating Ambient Humidity	≤93% RH

FAQ — Meter Wiring Tester

Q1: What is the main purpose of the Meter Wiring Tester?

A1: It identifies mismatches between energy meters, household loads and switches in low‑voltage distribution networks, solving wrong‑meter‑user pairing issues for field metering commissioning.

Q2: Can it perform tests without power outage?

A2: Yes. It applies power, current and phase discrimination technology to carry out live‑line on‑site testing, no power shutdown required.

Q3: What communication method does this tester adopt?

A3: It uses 127 kHz FSK power‑line carrier communication. The max communication distance reaches 2.5 km, and current test distance can be up to 5 km.

Q4: Can multiple slave units work at the same time?

A4: Yes. Multiple slave units are supported for parallel testing, greatly improving field inspection efficiency for mass residential users.

Q5: What electrical parameters can it measure?

A5: It measures voltage, current, power, unbalance degree and line voltage drop, with ±1% F.S. measurement accuracy for voltage and current.

Q6: What are its field‑adapted working conditions?

A6: Operates on AC220V, works at ‑30℃~70℃, humidity ≤93%RH. Multi‑protection circuits ensure safe on‑site operation.