HVTest HTZZ-1A Manual
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HVTest HTZZ-1A Manual

Transformer dc winding resistance tester
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Dear Client
Thank you for Purchasing our HTZZ-1A Transformer DC
Winding Resistance Tester. Please read the manual in detail
prior to first use, which will help you use the equipment skillfully.
Our aim is to improve and perfect the company's
products continually, so there may be slight
differences between your purchase equipment and
its instruction manual. You can find the changes in
the appendix. Sorry for the inconvenience. If you
have further questions, welcome to contact with our service
department.
may bring voltage, when you plug/draw the test wire
or power outlet, they will cause electric spark.
PLEASE CAUTION RISK OF ELECTRICAL SHOCK!
Company Address:
 T4，No. 41, High-tech 2 Road，East Lake High-tech Development
Zone， Wuhan
 Sales Hotline: 86-27- 87457960
 After Service Hotline: 86-27- 87459656
 Fax: 86-27- 87803129
 E-mail: qiao@hvtest.cc
 Website: www.hvtest.cc
The input/output terminals and the test column
1

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Summary of Contents for HVTest HTZZ-1A

  • Page 1 Dear Client Thank you for Purchasing our HTZZ-1A Transformer DC Winding Resistance Tester. Please read the manual in detail prior to first use, which will help you use the equipment skillfully. Our aim is to improve and perfect the company's...
  • Page 2  SERIOUS COMMITMENT All products of our company carry one year limited warranty from the date of shipment. If any such product proves defective during this warranty period we will maintain it for free. Meanwhile we implement lifetime service. Except otherwise agreed by contract.
  • Page 3 Make sure the product has been grounded correctly before connecting with the input/output port. Pay Attention to the Ratings of All Terminals To prevent the fire hazard or electric shock, please be care of all ratings and labels/marks of this product. Before connecting, please read the instruction manual to acquire information about the ratings.
  • Page 4 －Security Terms Warning: indicates that death or severe personal injury may result if proper precautions are not taken Caution: indicates that property damage may result if proper precautions are not taken.

  • Page 5: Table Of Contents

    Contents Overview ..............6 Application ..............7 Performance characteristics ........ 7 Specifications ............7 Panel Layout ............. 9 Working Principle ........... 9 Operation Methods ..........10 Problems and Solutions ........12 Notes ................ 12 Packing List ............. 13...

  • Page 6: Overview

    So measurement will take a long time, and accuracy is lower. In order to change the above situation, our company has developed HTZZ-1A DC Resistance Rapid Tester. This instrument is a high-precision regeneration product used to replace DC single/double bridge. Equipped with advanced switch power supply technology,the measurement speed of the instrument is faster a hundred times than that of the bridge.

  • Page 7: Application

     Application The instrument is an ideal device to measure different inductive load DC resistance and of low-voltage switch contact resistance, wire and cable resistance, welded joint resistance of power transformers, large motors and instrument transformers.  Performance characteristics 1. Fast test: The maximum output charge current of the instrument is up to 1A.
  • Page 8 Relative Humidity: ≤85 % 2. Measurement Range: The instrument has six ranges as follows: 1μΩ～20mΩ; 20 mΩ～200mΩ; 0.2Ω～2Ω; 2Ω～20Ω; 20Ω～200Ω; 200Ω～2kΩ 2kΩ～20kΩ 3. Measurement Accuracy：±(0.2%+2d) 4. Maximum Resolution: 1μΩ 5. Constant current source: 1A (1μΩ～20mΩ, 20 mΩ～200mΩ, 0.2Ω～2Ω); 100mA (2Ω～20Ω); 5mA（20Ω～200Ω）； 500uA（200Ω～2kΩ）；;...

  • Page 9: Panel Layout

     Panel Layout Figure 1 Panel Layout diagram Resistance Display (A) Test connection port Temperature/Current display earth Resistance range selector key 220V Power Outlet Temperature/Current selected key Power Switch Start/Stop key Power Indicator Working Station Indicator  Working Principle There is a constant current source in the instrument that can supply DC current.

  • Page 10: Operation Methods

     Operation Methods 1. Power supply This instrument provides two power sources for test: AC220V/DC12V. In the case of strong electromagnetic interference, the best choice is use the DC power supply for test. At this state the instrument can get stable tested value with strong anti-frequency interference ability.
  • Page 11 2. Test line connection method Well connect terminal I +, V +, V-, I- to the tested target as the wiring method in Figure 1. The connection method can eliminate the effect of contact resistance and line resistance on the measurements. Tested target RX Instrument Host...

  • Page 12: Problems And Solutions

    20 seconds; otherwise the EMF of the inductance could endanger personal safety.  Problems and Solutions  Notes 1. After testing, please charge up the battery in time. 2. During DC test, if the undervoltage indicator light became bright, pleaseuse AC power instead of DC power for test. 3.

  • Page 13: Packing List

     Packing List 1. Instrument host 2. Test lead 3. Earth wire 4. Fuse（2A） 5. AC 220V Power cord 6. The instruction manual 7. Certificate...

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