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Summary of Contents for HT HT327
- Page 1 ENGLISH User manual Copyright HT ITALIA 2012 Release EN 2.00 - 06/06/2012 www.valuetronics.com...
- Page 2 HT327 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 2.1. ...
- Page 3 HT327 1. SAFETY PRECAUTIONS AND PROCEDURES This meter is in compliance with safety 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 HT327 1.2. DURING USE 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 HT327 2. GENERAL DESCRIPTION This meter performs the below listed measurements: DC and AC TRMS Voltage DC and AC TRMS Current Resistance and Continuity test Frequency Capacitance Diode test All selectable by means of a 10 position rotary selector (including OFF position). Functions keys are also available (see §...
- Page 6 HT327 3. PREPARATION FOR USE 3.1. INITIAL This instrument was checked both mechanically and electrically prior to shipment. All possible cares and precautions were taken to let you receive the instrument in perfect conditions. Notwithstanding we suggest you to check it rapidly (eventual damages may have occurred during transport.
- Page 7 HT327 4. OPERATING INSTRUCTIONS 4.1. INSTRUMENT - DESCRIPTION 4.1.1. Front panel LEGEND: 1. LCD 2. HOLD Key 3. PK/ REL Key 4. MX/ MN Key 5. R/SEL Key 6. Backlight 7. Function selector 8. Input terminal A 9. Input terminal A...
- Page 8 HT327 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" appears. Press again HOLD to disable this function and resume normal operation. 4.2.2. PK/REL key This key have the double function of measuring max/min peak values (active for V and...
- Page 9 HT327 4.3. MEASUREMENTS 4.3.1. DC Voltage measurement CAUTION The maximum input for DC voltage is 1000V. 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 10 HT327 4.3.2. AC Voltage measurement CAUTION The maximum input for AC voltage is 750Vrms. 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 2.
- Page 11 HT327 4.3.3. DC Current measurement CAUTION The maximum input for DC current is 10A. 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. Power off the circuit under test.
- Page 12 HT327 4.3.4. AC Current measurement CAUTION The maximum input for DC current is 10A. Do not attempt to measure higher currents to avoid electrical shocks or damages to the instrument. Fig. 5: Using the instrument for AC Current measurement 1. Power off the circuit under test 2.
- Page 13 HT327 4.3.5. Resistance measurement and Continuity 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 Resistance measurement and Continuity test 1. Selecting the position / A jack and black plug...
- Page 14 HT327 4.3.6. Diode test CAUTION Before taking diode test on remove power from the circuit being tested and discharge all capacitors. Fig. 7: Using the instrument for Diode test 1. Selecting the position A jack, and black plug 2. Insert the test leads into the jacks, the red plug into V into COM jack 3.
- Page 15 HT327 4.3.7. Capacitance measurement CAUTION Before taking capacitance measurements in circuit remove power from the circuit being tested and discharge all capacitors. Due to internal delay time, bargraph it’s no operative in capacitance measurement. Fig. 8: Using the instrument for Capacitance measurement Selecting the position A jack and black...
- Page 16 HT327 4.3.8. Frequency measurement CAUTION The maximum input for AC voltage is 750Vrms. Do not attempt to measure higher voltages to avoid electrical shocks or damages to the instrument. Fig. 9: Using the instrument for Frequency measurement 1. Selecting the position Hz.
- Page 17 HT327 5. 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 18 HT327 6. TECHNICAL SPECIFICATIONS 6.1. TECHNICAL FEATURES Accuracy is indicated as [%reading + (number of digits*resolution)] at 23°C±5°C, < 80%HR DC Voltage Overload Range Resolution Accuracy Input impedance protection (0.5%rdg + 3dgt) 400.0mV 0.1mV 4.000V 0.001V 1000VDC (0.5%rdg + 2dgt) 40.00V...
- Page 19 HT327 Diode Test Accuracy Test Open Overload Feature Resolution (0.4 0.8V) current voltage protection (1.5%rdg + 5dgt) 10mV 1.5mA <3V 600Vrms Continuity Test Overload Feature Buzzer Open voltage protection 600Vrms <35 about 1.3V Frequency Range Resolution Accuracy Sensitivity Overload protection 1.5V ÷...
- Page 20 HT327 6.1.1. Electrical specifications Conversion: TRMS Measuring rate: 1.5 times per second Temperature coefficient: 0.15×(accuracy)/°C (<18°C and >28°C) NMRR Normal Mode Rejection Ratio: >50dB for DC parameters and 50/60Hz CMRR Common Mode Rejection Ratio: >100dB from DC up to 60Hz on DCV >60dB from DC up to 60Hz on ACV...
- Page 21 HT327 7. SERVICE 7.1. 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.
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