HF-ET-808 Line Parameter Tester

HF-ET-808 Line Parameter Tester Product Introduction

HF‑ET‑808 Line Parameter Tester is a high‑precision instrument dedicated to measuring power‑frequency parameters of transmission lines, capable of precise measurement of complete sets of power‑frequency parameters for transmission lines.

Featuring compact footprint, light weight, high measurement accuracy, excellent stability and easy operation, it replaces the conventional multi‑meter testing method for line‑parameter measurement. It simplifies wiring, testing and recording workflows and greatly boosts working efficiency. Fitted with a large‑screen graphic LCD, it supports graphic menu navigation with Chinese on‑screen prompts, delivering user‑friendly man‑machine interaction for operators of all skill levels.

Product Features

1. Measures positive‑sequence and zero‑sequence parameters of transmission lines, including RMS voltage, RMS current, active power, reactive power and other parameters.
2. Supports external voltage transformers and current transformers for measuring‑range expansion.
3. Wide‑range voltage circuit: maximum measurable voltage up to 700 V. Accuracy is guaranteed without manual range switching. Wrong voltage‑range setting will not damage the instrument.
4. Large‑screen high‑brightness LCD with full‑Chinese menu and operation prompts for friendly human‑machine interaction. Touch‑key operation simplifies handling. Adjustable LCD brightness adapts to summer and winter ambient conditions.
5. Users can export test data via RS232 interface to an external micro‑printer for report output (printer is optional accessory).
6. RS232 serial communication port reserved for high‑voltage measuring vehicle users. It supports uploading calibration test data to PC for centralized data management.

Specifications

Item	Parameters
Voltage Measuring Range	0‑750 V wide range, single‑range full‑accuracy measurement
Current Measuring Range	0‑100 A, automatic internal range switching
Voltage, Current, Frequency Accuracy	±0.2%
Power Accuracy	±0.5% (CosΦ＞0.1), ±1.0% (0.02)
Impedance, Capacitive Reactance, Inductive Reactance Accuracy	0.5%
Resistance, Capacitance, Inductance, Conductance, Susceptance Accuracy	0.5%
Operating Temperature	‑10℃ ~ +40℃
Power Supply	AC 160V‑400V
Insulation Performance	Insulation resistance between voltage/current input terminals and enclosure ≥100 MΩPower‑supply input terminal withstands 2 kV power‑frequency RMS voltage for 1 min against enclosure
Dimensions	35cm×26cm×13cm
Weight	4 kg

FAQ‑Line Parameter Tester

Q1: What is the Line Parameter Tester used for?

A: It is a portable high‑precision instrument for on‑site power‑frequency parameter measurement of transmission lines. It tests positive‑sequence and zero‑sequence parameters, including RMS voltage, RMS current, active/reactive power, impedance, capacitance and inductance.

Q2: Can I extend the measuring range?

A: Yes. External voltage transformers and current transformers can be connected to expand measurement range for high‑voltage and large‑current scenarios.

Q3: What is the advantage of its wide‑range voltage circuit?

A: It supports 0‑750 V wide‑range measurement without manual range switching. Wrong range setting will not cause damage to the tester itself.

Q4: How to print test reports?

A: Test data can be sent to an external micro‑printer through the RS232 interface. Please note the printer is an optional accessory, not included in standard delivery.

Q5: What is the function of RS232 serial port?

A: It supports data uploading to upper‑computer. Users can realize centralized data management and report processing, especially suitable for cooperating with high‑voltage measuring vehicles.

Q6: Is the display adaptable for different ambient light?

A: The high‑brightness LCD screen supports brightness adjustment, which fits different ambient conditions in summer and winter for clear reading on site.

Q7: What are the main accuracy indexes?

A: Voltage, current and frequency: ±0.2%; power: ±0.5% (CosΦ＞0.1); impedance, capacitive reactance, inductive reactance: 0.5%.

Q8: What power supply does it require?

A: AC 160V‑400V wide‑voltage power supply. It adapts to unstable field‑site power‑supply conditions.

Q9: What is the operating temperature and physical dimension?

A: Operating temperature:‑10℃ ~ +40℃. Dimension:35cm×26cm×13cm; weight: only 4 kg, easy for field transportation.

Q10: About insulation safety performance?

A: Insulation resistance ≥100 MΩ between input terminals and enclosure. Power‑supply terminal can withstand 2 kV power‑frequency voltage for 1 minute for reliable field‑use safety.