ENGLISH User manual Copyright HT ITALIA 2012 Version EN 1.
HT701 Table of contents: 1. PRECAUTIONS AND SAFETY MEASURES ............................................................... 2 1.1. Preliminary instructions ..................................................................................................... 2 1.2. During use ......................................................................................................................... 3 1.3. After use .................................................................................................
HT701 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.
HT701 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 activating the rotary switch, disconnect the test leads from the circuit under test. When the instrument is connected to the circuit under test, do not touch any unused terminal. Avoid measuring resistance if external voltages are present.
HT701 2. GENERAL DESCRIPTION Instrument HT701 carries out the following measurements: DC and AC TRMS voltage DC and AC TRMS current Resistance and Continuity test Insulation resistance with test voltage of 50, 100, 250, 500, 1000VDC AC voltage and current frequency Capacity Diode test Temperature with K-type probe Each of these functions can be selected using the 8-position rotary switch, including an OFF position. The instrument is also equipped with function keys (see § 4.
HT701 3. PREPARATION FOR USE 3.1. INITIAL CHECKS Before shipping, the instrument has been checked from an electric as well as mechanical point of view. All possible precautions have been taken so that the instrument is delivered undamaged. However, we recommend generally checking the instrument in order to detect possible damage suffered during transport. In case anomalies are found, immediately contact the forwarding agent.
HT701 4. OPERATING INSTRUCTIONS 4.1. INSTRUMENT DESCRIPTION CAPTION: 1. Auto Backlight 2. LCD display 3. STORE/RECALL key 4. HOLD/LOCK key 5. RANGE key 6. Hz/0 key 7. MAX/MIN key 8. MODE key 9. TEST key 10. Rotary selector switch 11. Input terminal Hz°CV 12. Input terminal COM 13. Input terminal INSULATION 14. Input terminal mA Fig.
HT701 4.2. DESCRIPTION OF FUNCTION KEYS The following § describes the functions of the different keys. When pressing a key, the display shows the symbol of the activated function and the buzzer sounds. 4.2.1. HOLD/LOCK key Pressing the HOLD/LOCK key: in any function, except for the insulation measurement, keeps the value of the measured quantity shown on the display. The message “HOLD” appears on the display.
HT701 4.2.5. STORE/RECALL key The STORE/RECALL key carries out the following operations: Simply pressing the key allows saving the value on the display in the memory. The symbol “MEM” flashes for a second and the considered memory location is immediately indicated on the display. Each measuring function has its own dedicated memory space for a maximum of 100 available locations for each of them.
HT701 4.3. INTERNAL MODES OF THE INSTRUMENT 4.3.1. Deactivation of the Autobacklight function The instrument has a display backlighting function (see Fig.1 – part 1) which activates automatically in conditions of poor visibility. The function deactivates automatically after a few seconds. To manually disable the function, proceed as follows: 1. Switch off the instrument (OFF). 2. Turn the rotary switch in any position, keeping the MAX/MIN key pressed until the display has completely turned on. 3.
HT701 4.4. MEASURING OPERATIONS 4.4.1. DC Voltage measurement CAUTION The maximum input DC voltage is 1000 V. Do not measure voltages exceeding the limits given in this manual. Exceeding voltage limits could result in electrical shocks to the user and damage to the instrument. Fig. 2: Use of the instrument for DC voltage measurement 1. Select positions V or mV 2. If necessary, press the MODE key for manually selecting DC measurement (see § 4.3.3). 3.
HT701 4.4.2. AC Voltage and Frequency measurement CAUTION The maximum input AC voltage is 1000Vrms. Do not measure voltages exceeding the limits given in this manual. Exceeding voltage limits could result in electrical shocks to the user and damage to the instrument. Fig. 3: Use of the instrument for AC voltage measurement 1. Select positions V or mV 2. If necessary, press the MODE key for manually selecting AC measurement (see § 4.3.3) or HFR measurement (see § 4.3.4). 3.
HT701 4.4.3. DC Current measurement CAUTION The maximum input DC current is 400mA. Do not measure currents exceeding the limits given in this manual. Exceeding current limits could result in electrical shocks to the user and damage to the instrument. Fig. 4: Use of the instrument for DC current measurement 1. Cut off power supply from the circuit to be measured 2. Select the mA position. 3. If necessary, press the MODE key for manually selecting DC measurement (see § 4.3.3). 4.
HT701 4.4.4. AC current and frequency measurement CAUTION The maximum input AC current is 400mA. Do not measure currents exceeding the limits given in this manual. Exceeding current limits could result in electrical shocks to the user and damage to the instrument. Fig. 5: Use of the instrument for AC current measurement 1. Cut off power supply from the circuit to be measured. 2. Select the mA position. 3. If necessary, press the MODE key for manually selecting AC measurement (see § 4.3.3). 4.
HT701 4.4.5. Resistance measurement and continuity test CAUTION Before attempting any resistance measurement, cut off power supply from the circuit to be measured and make sure that all capacitors are discharged, if present. Fig. 6: Use of the instrument for resistance measurement and continuity test 1. Select the position. The symbol “M” is shown on the display. 2. Use the RANGE key for manually selecting the measuring range (see § 4.2.6) or use Autorange selection.
HT701 4.4.6. Diode test CAUTION Before attempting any diode test, cut off power supply from the circuit to be measured and make sure that all capacitors are discharged, if present. Fig. 7: Use of the instrument for diode test position. 1. Select the 2. Press the MODE key to select the Diode Test. The symbol “ ” is shown on the display. 3. Insert the red cable into input lead Hz°CV and the black cable into input lead COM. 4.
HT701 4.4.7. Capacitance measurement CAUTION Before carrying out capacitance measurements on circuits or capacitors, cut off power supply from the circuit being tested and let all capacitance in it be discharged. Fig. 8: Use of the instrument for Capacitance measurement 1. 2. 3. 4. 5. 6. 7. Select the position. If necessary, press the Hz/0 key to activate the Relative capacitance measurement (see § 4.2.3). The symbol “0” flashes and the value on the display is zeroed.
HT701 4.4.8. Temperature measurement Fig. 9: Use of the instrument for Temperature measurement 1. Select the °C°F position. 2. Press the MODE key to select measurement in °C or °F. 3. Insert the provided adapter into the input terminals Hz°CV and COM, respecting the red and black colours found on it (see Fig. 9) 4. Connect the provided K-type wire probe or one of the optional probes (see § 6.3.2) to the instrument by means of the adapter, respecting the positive and negative polarity on the probe’s plug.
HT701 4.4.9. Insulation resistance measurement CAUTION Check that no voltage is present at the ends of the circuit to be tested before carrying out an insulation measurement. During the whole test, make sure that the applied voltage cannot be accessed by third parties and adequately arrange the system by disconnecting everything that must not be included in the test. Fig. 10: Use of the instrument for Insulation measurement 1. 2. 3. 4. 5. 6. 7. 8. 9. Select the INSULATION position.
HT701 5. MAINTENANCE CAUTION 5.1. Only expert and trained technicians should perform maintenance operations. Before carrying out this operations, make sure you have disconnected all cables from the input terminals Do not use the instrument in environments with high humidity levels or high temperatures. Do not expose to direct sunlight Always switch off the instrument after use.
HT701 6. TECHNICAL SPECIFICATIONS 6.1. TECHNICAL CHARACTERISTICS Accuracy is indicated as [% rdg + (number of dgt * resolution)] at 23°C±5°C, <80%RH DC Voltage Range 100.00mV 1000.0mV 10.000V 100.00V 1000.0V Resolution 0.01mV 0.1mV 0.001V 0.01V 0.1V Accuracy Input impedance Overload protection (0.08%rdg+2dgt) 10M // <100pF 1000VDC/ACrms Accuracy (5060Hz) Accuracy (605KHz) Overload protection (0.08%rdg+3dgt) AC TRMS Voltage Range Resolution 100.00mV 1000.0mV 10.000V 100.00V 1000.0V 0.
HT701 Resistance Range Resolution Accuracy Max voltage open circuit Overload protection 1000.0 10.000k 100.00k 1000.0k 10.000M 40.00M 0.1 0.001k 0.01k 0.1k 0.001M 0.01M (0.5%rdg+2dgt) Approx. 0.25V 1000VDC/ACrms Continuity test Range 400.0 Accuracy (0.5%rdg+2dgt) Buzzer <30 Open circuit voltage Overload protection 1000VDC/ACrms Approx. 1.2V Test current Open circuit voltage Overload protection Diode test Range 2.000V Accuracy (0.5%rdg+2dgt) 0.6mA 2.
HT701 Temperature with K probe Range -200.0°C ÷ 0.0°C 0.0°C ÷ 1200.0°C -328.0°F ÷ 32.0°F 32.0°F ÷ 2192.0°F Resolution 0.1°C 0.1°F Accuracy (1.0%rdg+2°C) (1.0%rdg+1°C) (1.0%rdg+36°F) (1.0%rdg+18°F) Overload protection Accuracy Overload protection 1000VDC/ACrms Insulation resistance Test voltage 50V DC 100V DC 250V DC 500V DC 1000V DC Measuring range 2.000M 20.00M 55.0M 2.000M 20.00M 110.0M 2.000M 20.00M 200.0M 275M 2.000M 20.00M 200.0M 550M 2.000M 20.00M 200.0M 2000M 22.
HT701 6.1.1. Electrical characteristics Conversion: Sampling frequency: Temperature coefficient: NMRR Normal Mode Rejection Ratio: CMRR Common Mode Rejection Ratio: 6.1.2. Considered standards Safety: TRMS 3 times per second 0.
HT701 6.3. ACCESSORIES 6.3.1. Standard accessories Pair of test leads Pair of alligator clips Remote probe for insulation measurement K-type wire probe + adapter Belt with magnetic end for fastening to metal surfaces Protection holster Batteries (not inserted) User manual 6.3.2.
HT701 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. Should the instrument be returned to the After-sales Service or to a Dealer, transport will be at the Customer’s charge. However, shipment will be agreed in advance.
