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HT HT77N User Manual

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ENGLISH
User manual
1.800.561.8187
information@itm.com
www.
.com
 Copyright HT ITALIA 2012
Release EN 2.00 - 18/12/2012

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Summary of Contents for HT HT77N

  • Page 1 ENGLISH User manual 1.800.561.8187 information@itm.com www. .com  Copyright HT ITALIA 2012 Release EN 2.00 - 18/12/2012...

  • Page 2: Table Of Contents

    HT77N Table of contents: PRECAUTIONS AND SAFETY MEASURES ............... 2 1.1. Preliminary instructions ......................2 1.2. During use ..........................3 1.3. After use ............................ 3 1.4. Definition of measurement (overvoltage) category..............3 GENERAL DESCRIPTION ................... 4 PREPARATION FOR USE ................... 4 3.1.

  • Page 3: Precautions And Safety Measures

    HT77N 1. PRECAUTIONS AND SAFETY MEASURES The instrument has been designed in compliance with directive IEC/EN61010-1 relevant to electronic measuring instruments. For your safety and in order to prevent damaging the instrument, please carefully follow the procedures described in this manual and read all notes preceded by the symbol with the utmost attention.

  • Page 4: During Use

    HT77N 1.2. DURING USE Please carefully read the following recommendations and instructions: CAUTION Failure to comply with the Caution notes and/or Instructions may damage the instrument and/or its components or be a source of danger for the operator.  Before switching on the clamp, remove the conductor from the clamp jaw.

  • Page 5: General Description

    HT77N 2. GENERAL DESCRIPTION Dear Customer, thank you for choosing one of the instruments in our range. If used according to the instructions given in this manual, the clamp you have just purchased will guarantee accurate and reliable measures. The clamp is designed to guarantee maximum safety, thanks to a newly conceived development, which ensures double insulation and enables the clamp to reach CAT III 300V in compliance with standard IEC/EN61010-1.

  • Page 6: Operating Instructions

    HT77N 4. OPERATING INSTRUCTIONS 4.1. INSTRUMENT DESCRIPTION 4.1.1. Description of the controls CAPTION: 1. Inductive clamp jaw 2. Opening lever /Data/Auto/Peak Hold key 4. Wide/50-60Hz/Compare key 5. Range key 6. LCD display 7. Display backlight sensor Fig. 1: Instrument description 4.1.2.

  • Page 7: Description Of Functions Keys

    HT77N 4.2. DESCRIPTION OF FUNCTIONS KEYS 4.2.1. /Data/Auto/Peak Hold key Switching on/off Shortly pressing the “ ” key allows switching on the clamp. While switching on, the display shows the charge percentage of the power supply battery. Replace the battery the 0% appears (see §...

  • Page 8: Wide/50-60Hz/Compare Key

    HT77N 4.2.2. Wide/50-60Hz/Compare key Wide/50-60Hz Shortly pressing the Wide/50-60Hz/Compare key allows enabling the low-pass filter, which has a cutting frequency of approx. 100Hz. When the function is enabled, the full scale is forced in manual mode and the display shows “50-60Hz”. Shortly pressing the Wide/50-60Hz/Compare key again, with enabled function, allows disabling the low-pass filter and going back to the normal measuring mode.

  • Page 9: Operating Instruction

    HT77N 4.3. OPERATING INSTRUCTION 4.3.1. AC Current measurement CAUTION Insert the cable in the middle of the clamp jaws, in order to obtain accurate measures. Use the marks as a reference (see 4.1.2) Correct Incorrect Fig. 3: Use of the clamp for AC current measurement 1.

  • Page 10: Leakage Current Measurement

    HT77N 4.3.2. Leakage current measurement CAUTION Insert the cable(s) in the middle of the clamp jaws, in order to obtain accurate measures. Use the marks as a reference (see § 4.1.2) Fig. 4: Measuring leakage current with direct Fig. 5: Measuring leakage current with...

  • Page 11: Maintenance

    HT77N 5. MAINTENANCE 5.1. GENERAL INFORMATION 1. The instrument you purchased is a precision instrument. While using and storing the instrument, carefully observe the recommendations listed in this manual in order to prevent possible damage or danger during use. 2. Do not use the instrument in environments with high humidity levels or high temperatures.

  • Page 12: Technical Specifications

    HT77N 6. TECHNICAL SPECIFICATIONS 6.1. TECHNICAL CHARACTERISTICS Accuracy indicated as [%reading + (digit number*resolution)] at 23°C±5°C, < 80%RH AC TRMS current Accuracy Accuracy Range Resolution (50  60Hz) (61  400Hz) 6mA (*) 0.001mA 60mA 0.01mA  (1% rdg+8dgt)  (2% rdg+11dgt) 600mA 0.1mA...

  • Page 13: Electrical Specifications

    HT77N 6.1.1. Electrical specifications Conversion type: TRMS Sample rate: 4 times / second Temperature coefficient: 0.2x(accuracy) /°C, <18°C o >28°C 6.1.2. Reference guideline Safety: IEC/EN61010-1 Insulation: double insulation Pollution level: Max height of use: 2000m (6562 ft) Measurement category: CAT III 300V 6.1.3.

  • Page 14: Service

    HT77N 7. SERVICE 7.1. WARRANTY CONDITIONS This instrument is warranted against any material or manufacturing defect, in compliance with the general sales conditions. During the warranty period, defective parts may be replaced. However, the manufacturer reserves the right to repair or replace the product.

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