I. Overview

1.1 Introduction

The pulse coil inter-turn tester (digital inter-turn tester) can conduct electrical tests on components with coil windings efficiently and non-destructively. The principle is to apply the same pulse voltage to the standard coil winding and the tested winding, and compare the transient waveforms of the two to test the quality of the tested coil. The transient waveform is the attenuated oscillation waveform that occurs in the coil. It can simultaneously judge the inductance, quality factor, number of turns of the winding and the short circuit between turns of the winding. In the case of an iron core, it can also judge its material. difference etc. In the case of applying high-voltage pulses, the occurrence of corona discharge can also be used to judge poor insulation. In a word, each element of marking the quality of the coil can be checked in a very short time.

The HZ211S/HZ212S series pulse coil turn-to-turn tester produced by our factory adopts microcomputer technology to quantify various parameters of the waveform, and then displays and judges with intuitive waveforms. It is easy to operate, accurate in judgment and high in automation. The instrument is small in size, light in weight and easy to carry.

1.2 Type selection of pulsed coil turn-to-turn tester

Due to the different products to be tested, the user needs to select the appropriate pulse coil interturn tester according to the actual situation. The following table lists the features of some pulsed coil turn-to-turn testers for users to choose.

Instrument Model Main Features Description

New HZ212S-05 series LCD display, multi-winding, standard waveform storage, storage, sorting, communication, multi-channel comparison

HZ211S-05 series LCD display, single winding, standard waveform storage, storage, sorting, communication

Old HZ212 -05 series LCD display, multi-winding, standard waveform storage, storage, multi-channel comparison (sorting, communication needs to be customized)

HZ211A-05 series LCD display, single winding, standard waveform storage, storage, two-way comparison (sorting, communication needs to be customized)

HZ211 -05 series LCD display, single winding, storage of standard waveforms, with storage (sorting, communication needs to be customized)

HZ201A-05 series LCD display, two-way comparison, no storage, no sorting, no communication

1.3 Main technical indicators

Model HZ211S-10

Number of channels 1 channel

Pulse voltage range 1KV~10KV

Pulse voltage accuracy ±5%±50V

Pulse voltage step 200V

Measuring speed about 5 times/second

High voltage source control Switching power supply is controlled by MCU

Impact times Single EXT (1~29 times), continuous INT

Trigger mode Manual, Foot control, PC

Detection and judgment mode area; area difference; corona discharge amount; phase

Sound mode Qualified sound; Unqualified sound; Mute

Storage waveform capacity 100 waveforms and their parameters

Waveform resolution A/D: 8 bits; Sampling speed: 25nS (40MHz); Waveform points: 250

Liquid crystal display Resolution: 320×240; 5.1 inches; white characters on a blue background

Power 50W

Power input 220VAC±10% 50Hz±5%

Dimensions 400(W)×132(H)×430(D) Weight about 10Kg

Operating temperature: 10°C——30°C; Operating humidity: 20%——80%RH

Storage temperature: 5°C——40°C: Storage humidity: 5%——90%RH

Special functions and parameters can be customized according to user requirements