Ht-instruments M71 Bedienungsanleitung

 Copyright HT ITALIA 2007 Release EN 1.01 - 21/02/2012 ENGLISH User manual

M71 EN – 9 6. CAL After pressing the CAL key the instrument carries out zero setting of cables' resistance (this procedure takes approx.

M71 EN – 10 4.3.2. EARTH 2W- Measurement procedure CAUTION The instrument can be used for voltage and current measurements on installatio

M71 EN – 11 ¾ Only in case of a TT system a neutral conductor can be used as auxiliary earth rod (see Fig. 4). CAUTION The instrument di

M71 EN – 12 4.3.3. Message description for EARTH 2W measurement 1. If the following condition is met: RDISPLAYED < 0.11Ω the instrument dis

M71 EN – 13 4.4. EARTH 3W: THREE WIRE EARTH RESISTANCE MEASUREMENT 4.4.1. EARTH 3W- Zero setting of cables CAUTION The instrument can be

M71 EN – 14 6. CAL After pressing the CAL key the instrument carries out zero setting of cables' resistance (this procedure takes approx. 3

M71 EN – 15 4.4.2. EARTH 3W- Measurement procedure CAUTION The instrument can be used for voltage and current measurements on installatio

M71 EN – 16 1. Press the instrument's start key. 2. Select function EARTH 3W pressing the right arrow key. 3. AUTO If the circ

M71 EN – 17 4.4.3. Message description for EARTH 3W measurement 1. If the following condition is met: RDISPLAYED < 0.11Ω the instrument dis

M71 EN – 18 6. If the volt metric circuit (terminal S) shows a too high resistance value the side message is displayed. Check connection of re

M71 EN – 1 Table of contents: 1. SAFETY PRECAUTIONS AND PROCEDURES ... 2 1.1. Prelimina

M71 EN – 19 5. MAINTENANCE 5.1. GENERAL 1. This instrument is a precision meter. During its use and storage you are recommended to keep the ins

M71 EN – 20 6. TECHNICAL SPECIFICATIONS 6.1. TECHNICAL FEATURES Accuracy is indicated as [% rdg + (dgt number) * resolution] at 23°C ± 5°C,<

M71 EN – 21 6.1.1. Safety standards Instrument safety: IEC/EN61010-1, IEC/EN61557-1, IEC/EN61557-5 Technical literature: IEC/EN61187 Accessory

M71 EN – 22 7. SERVICE 7.1. WARRANTY TERMS This instrument is guaranteed against material and manufacturing defects, in compliance with our gene

M71 EN – 23 8. PRACTICAL REPORTS FOR ELECTRICAL TESTS 8.1. EARTH RESISTANCE MEASUREMENT IN TT SYSTEMS PURPOSE OF THE TEST Make sure that th

M71 EN – 24 8.2. EARTH RESISTANCE MEASUREMENT, VOLT AMPERE METRIC METHOD Method for small sized earth rods Let current stream between the earth

M71 EN – 25 Method for medium and large sized earth rods This procedure is based on the volt ampere metric method as well, however it is mainly

M71 EN – 2 1. SAFETY PRECAUTIONS AND PROCEDURES This instrument was designed in compliance with the IEC/EN61557-1 and IEC/EN61010-1 guidelines

M71 EN – 3 1.1. PRELIMINARY INSTRUCTIONS • This instrument has been designed for use in environments with pollution degree • It can be used f

M71 EN – 4 1.4. DEFINITION OF MEASUREMENT CATEGORY (OVERVOLTAGE) Standards IEC/EN61010-1 (Safety requirements for electrical equipment for meas

M71 EN – 5 2. GENERAL DESCRIPTION This instrument, whether used according to the instructions given in this manual, will grant you accurate and

M71 EN – 6 4. WORKING INSTRUCTIONS 4.1. INSTRUMENT DESCRIPTION CAPTION: 1. Inputs 2. Display 3. ON/OFF key 4. CAL key 5. Switch of test m

M71 EN – 7 4.1.1. Switching on When switching on the instrument a brief tone is audible along with display of all segments for about one seco

M71 EN – 8 4.3. EARTH 2W:TWO-WIRE EARTH RESISTANCE MEASUREMENT 4.3.1. EARTH 2W- Zero setting of cables CAUTION The instrument can be use