HT Instruments HT25N User Manual
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HT Instruments HT25N User Manual

HT Instruments HT25N User Manual

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ENGLISH
User manual
 Copyright HT ITALIA 2017
Release EN 2.01 - 06/09/2017

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Summary of Contents for HT Instruments HT25N

  • Page 1 ENGLISH User manual  Copyright HT ITALIA 2017 Release EN 2.01 - 06/09/2017...

  • Page 2: Table Of Contents

    HT25N Table of contents:   SAFETY PRECAUTIONS AND PROCEDURES ............2   1.1.  Preliminary ........................2  1.2.  During use ......................... 3  1.3.  After use ..........................3  1.4.  Measuring (overvoltage) categories definitions ..............3  GENERAL DESCRIPTION ................... 4     PREPARATION FOR USE ................... 4  ...

  • Page 3: Safety Precautions And Procedures

    HT25N 1. SAFETY PRECAUTIONS AND PROCEDURES This meter is in compliance with IEC/EN61010-1 guideline related to electronic measuring instruments. For your own safety and to avoid damaging the instrument follow the procedures described in this instruction manual and read carefully all notes preceded by this symbol .When taking measurements:...

  • Page 4: During Use

    HT25N 1.2. DURING USE Read the recommendations which follow and the instructions in this manual: CAUTION An improper use may damage the instrument and/or its components or injure the operator.  When changing the range, first disconnect the test leads from the circuit under test in order to avoid any accident.

  • Page 5: General Description

    HT25N 2. GENERAL DESCRIPTION This instrument performs the below listed measurements:  DC Voltage  AC sine wave Voltage  DC Current  Resistance  Continuity test  Diode test  9V and 1.5V battery test All function is selectable by means of a rotary selector. In addition there are the HOLD key to hold the displayed value and the key for activated/disable LCD backlight.

  • Page 6: Nomenclature

    HT25N 4. NOMENCLATURE 4.1. INSTRUMENT DESCRIPTION CAPTION: 1. LCD display 2. HOLD key 3. Backlight 4. Function selector 5. Input terminal 10A 6. Input terminal VmAA 7. Input terminal COM Fig. 1: Instrument description 4.2. DESCRIPTION OF FUNCTION KEYS 4.2.1. HOLD key By pressing HOLD key the measured value is frozen on the display where the symbol "HOLD"...

  • Page 7: Operating Instructions

    HT25N 5. OPERATING INSTRUCTIONS 5.1. DC VOLTAGE MEASUREMENT CAUTION The maximum input for DC voltage is 600V. Do not attempt to measure higher voltages to avoid electrical shocks or damages to the instrument. Fig. 2: Using the meter for DC Voltage measurement 1.

  • Page 8: Ac Voltage Measurement

    HT25N 5.2. AC VOLTAGE MEASUREMENT CAUTION The maximum input for AC voltage is 600V. Do not attempt to measure higher voltages to avoid electrical shocks or damages to the instrument. Fig. 3: Using the instrument for AC Voltage measurement 1. Selecting the position 200V or 600V...

  • Page 9: Dc Current Measurement

    HT25N 5.3. DC CURRENT MEASUREMENT CAUTION The maximum input for DC current is 10A (10A input) or 200mA (VmAA input). Do not attempt to measure higher currents to avoid electrical shocks or damages to the instrument. Fig. 4: Using the instrument for DC Current measurement 1.

  • Page 10: Resistance Measurement

    HT25N 5.4. RESISTANCE MEASUREMENT CAUTION Before taking resistance measurements on the circuit remove power from the circuit being tested and discharge all capacitors. Fig. 5: Using the instrument for Resistance measurement 1. Selecting the position 200, 2000, 20k, 200k or 2000k...

  • Page 11: Continuity Test And Diode Test

    HT25N 5.5. CONTINUITY TEST AND DIODE TEST CAUTION Before taking resistance measurements on the circuit remove power from the circuit being tested and discharge all capacitors. Fig. 6: Using the instrument for Continuity test and Diode test 1. Selecting the position 2.

  • Page 12: Battery Test

    HT25N 5.6. BATTERY TEST Fig. 7: Using the instrument for Battery test 1. Selecting the position 1.5V (1.5V battery test) or 9V (9V battery test) 2. Insert the test leads into the jacks, the red plug into VmAA jack, and black plug into COM jack 3.

  • Page 13: Maintenance

    HT25N 6. MAINTENANCE CAUTION  Only skilled technicians can open the instrument and replace batteries. Before removing batteries disconnect the test leads from the input terminals to avoid electrical shocks  Do not expose it to high temperatures or humidity or direct sunlight ...

  • Page 14: Technical Specifications

    HT25N 7. TECHNICAL SPECIFICATIONS 7.1. TECHNICAL FEATURES Accuracy is calculated as [%rdg + (num. digits*resolution)] at 18°C  28°C, < 75%HR DC Voltage Overload Range Resolution Accuracy Input impedance protection 200.0mV 0.1mV 200Vrms (0.7%rdg + 3dgt) 2000mV 20.00V 0.01V >1M...

  • Page 15: Reference Standards

    HT25N 7.1.1. Reference standards Safety: IEC/EN61010-1 EMC: IEC/EN61326-1 Insulation: double insulation Pollution degree: Measurement category: CAT III 600V Max height of use: 2000m (6561ft) 7.1.2. General data Mechanical characteristics Dimensions (L x W x H): 150 x 70 x 48mm (6 x 3 x 2in)

  • Page 16: Service

    HT25N 8. SERVICE 8.1. WARRANTY CONDITIONS This instrument is guaranteed against material or production defects, in accordance with our general sales conditions. During the warranty period the manufacturer reserves the right to decide either to repair or replace the product. Should you need for any reason to return back the instrument for repair or replacement take prior agreements with the local distributor from whom you bought it.

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