HT Instruments 12, HT12 User manual
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HT 12 was designed in compliance with IEC/EN61010-1 for electric measurement devices. It can perform voltage and current measurements on 300V CAT III and 600V CAT II installations. The integrated clamp sensor enables current measurements without breaking the circuit. The built-in continuity test with audible indication supports quick troubleshooting. Safety features include double insulation, overvoltage protection, and automatic power-off to ensure safe operation. For added convenience, the large LCD display provides clear readings, and the intuitive button layout allows for easy function selection.
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ITA Copyright HT ITALIA 2013 3. PREPARAZIONE ALL’UTILIZZO 8. SPECIFICHE TECNICHE ATTENZIONE ATTENZIONE ATTENZIONE Corrente DC Campo misura Campo misura 0.0 340.0 0.000 3.400k 0.00 34.00k 0.0 340.0k 0.000 3.400M 0.00 34.00M Risoluzione 0.1 0.001k 0.01k 0.1k 0.001M 0.01M ENG HT12 USER MANUAL 1. PRECAUTIONS AND SAFETY MEASUREMENTS This instrument complies with safety Standard IEC/EN61010-1 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 CAUTION Avoid measuring in humid or wet places Avoid measuring in rooms where explosive gas, combustible gas, steam or excessive dust is present Keep you insulated from the object under test Do not touch exposed metal parts such as test lead ends, sockets, fixing objects, circuits etc. Avoid doing that if you notice anomalous conditions such as breakages, deformations, fractures, leakages of battery fluid, blind display etc. Be careful when measuring voltages exceeding 20V to avoid risks of electrical shock The following symbols are used in user manual and on the meter: CAUTION - refer to the instruction manual - an improper use may damage the instrument or its components Double insulated meter The instrument can clamp not insulated live cables corresponding to the measurement category indicated on them AC voltage or current DC voltage or current CAUTION: this symbol indicates that equipment, its accessories and battery shall be subject to a separate collection and correct disposal Copyright HT ITALIA 2013 Release EN 1.02 - 15/02/2013 This instrument has been designed for use in environments with pollution degree 2 It can be used for VOLTAGE and CURRENT measurements on installations with overvoltage category CAT III 300V and CAT II 600V Only the leads supplied with the instrument guarantee compliance with the safety standards in force. They must be under good conditions and, if necessary, replaced with identical ones Do not test or connect to any circuit exceeding the specified overload protection Do not effect measurements under environmental conditions exceeding the limits indicated in § 8 Make sure that batteries are properly installed Before connecting the test probes to the installation, make sure that the function selector is positioned on the required measurement Make sure that LCD and function selector indicate the same function When changing the range, first disconnect the test leads from the circuit under test in order to avoid any accident When the instrument is connected to measuring circuits never touch any unused terminal If during measurement the displayed values remain constant check whether the HOLD function is active 1.2 Measuring overvoltage category definitions According to the IEC/EN61010-1 guidelines the circuits are divided into the following measurement categories: CAT IV is for measurements performed at the source of the lowvoltage installation CAT III is for measurements performed in the building installation CAT II is for measurements performed on circuits directly connected to the low voltage installation CAT I is for measurements performed on circuits not directly connected to MAINS 5.2 RH key By pushing RH key, the manual mode is activated, the “AUTO” symbol disappears and the symbol “ ” is displayed. To quit this function keep RH key pressed for at least 1 second or rotate the 6.2.1 DC Current measurement selector into another position. The Autorange mode is automatically 1. Rotate the selector on position. The “DC” and “AUTO” symbols active whenever you switch on the meter are displayed. Press RH key for the selection of manual range (see § 5.2) 6. HOW TO PERFORM THE MEASUREMENTS 2. Perform zeroing operation turning the adjust knob which is 6.1 DC/AC Voltage measurement present on the central part of the clamp sensor. The “0.0” value CAUTION should be displayed to perform correct measurements Maximum input for AC/DC voltage measurements is 3. Put the conductor in the fork of clamp sensor at the centre of the 600V. Do not take any voltage measurement arrows keys which are present in the frontal side (see picture) exceeding this limit in order not to risk electrical shock and respect the current direction as indicated by the arrow key or damaging the meter which is present on the meter sideways 1. Rotate the selector on or position. The “DC” or “AC” and 4. The current value is displayed. The symbol "-" on the instrument display indicates that the current has opposite direction “AUTO” symbols are shown at display. Press RH key for the compared to the previous connection selection of manual range (see § 5.2) 2. Connect the red and black test leads to the positive and negative 6.2.2 AC Current measurement position. The “AC” and “AUTO” poles of the circuit under test respectively (for DC voltage). The 1. Rotate the selector onto symbols are displayed. Press RH key for the selection of manual voltage value is displayed range (see § 5.2) 3. If the message "O.L" is displayed the maximum voltage value 2. Put the conductor in the fork of clamp sensor at the centre of the was exceeded arrows keys which are present in the frontal side (see picture) 4. On DC voltage measurement the symbol "-" on the instrument and respect the current direction as indicated by the arrow key display indicates that voltage has opposite direction compared to which is present on the meter sideways the previous connections 3. The current value is displayed 5. For Data HOLD feature see § 5.1 4. For Data HOLD feature see § 5.1 6.2 Current measurement with fork sensor clamp 6.3 Resistance and Continuity test measurements CAUTION Before taking resistance measurements on circuit remove power from the circuit under test and discharge all capacitors 1. Rotate the selector onto / position. The “M ” and “O.L” symbols are displayed. Press RH key for the selection of manual range (see § 5.2) 2. Connect the test leads to the circuit under test. The resistance value is displayed 3. The continuity test is always active and the buzzer sounds when resistance values are lower than 30 . In Manual mode the “ ” symbol is displayed only in the 340 range HT12 performs the following measurements: DC and AC voltage DC and AC current by using integrated sensor fork clamp Resistance and continuity test Voltage and current frequency All selectable by means of a 7-position function selector. Function keys DH and RH in addition to an analogical bargraph are also available (see § 5.1 and § 5.2). The selected quantity is displayed with indication of measuring unit and active functions. The instrument is provided with an Auto Power Off function consisting in an automatic switching off 10 minutes after last pressure on keys or rotation of selector. To resume normal operation, switch on the instrument again 3. PREPARATION FOR USE 3.1 Initial checks This instrument was checked both mechanically and electrically prior to shipment. All possible cares and precautions were taken to let you receive the instrument under perfect conditions. Notwithstanding we suggest you to check it rapidly (any damage may have occurred during transport – if so please contact the local distributor from whom you bought the item). Make sure that all standard accessories mentioned in § 8 are included. Should you have to return back the instrument for any reason please follow the instructions mentioned in § 9 3.2 Supply voltage The instrument is powered by 2x1.5V batteries AAA LR03 included in the packaging. When batteries are low the symbol " " is displayed. To replace/insert batteries follow the instructions indicated in § 7 3.3 Calibration The instrument complies with the technical specifications contained in this manual and such compliance is guaranteed for 12 months 3.4 Storage After a period of storage under extreme environmental conditions exceeding the limits mentioned in § 8 let the instrument resume normal operating conditions before using it 8. TECHNICAL SPECIFICATIONS CAUTION 5.1 DH key By pressing DH key the measured value is hold on the display where the symbols "H" and “ ” appear. Pressing again DH to disable this function and resume normal operation CAUTION CAUTION 6.4 Frequency measurement Do not perform measurements on circuits with a voltage exceeding 600V AC/DC between phases or exceeding 300V AC/DC between phase and ground to avoid possible shock hazard Do not perform measurements with test leads connected to the circuit under test Do not apply strong vibrations to the clamp sensor and keep the fingers behind the protective bar during measurements 1.1 Preliminary instructions Do not perform measurements on circuits with a voltage exceeding 600V AC/DC between phases or exceeding 300V AC/DC between phase and ground to avoid possible shock hazard 6.4.1 Voltage frequency measurement 1. Rotate the selector on Hz position. Press RH key for the selection of manual range (see § 5.2) 2. Connect the test leads to the circuit under test. The frequency value (in kHz or MHz) is displayed 6.4.2 Current frequency measurement 1. Rotate the selector on Hz position. Press RH key for the selection of manual range (see § 5.2) 2. Put the conductor in the fork of clamp sensor at the centre of the arrows keys. The value (in kHz or MHz) is displayed DO NOT CONNECT SIMULTANEOUSLY THE TEST LEADS AND THE CLAMP SENSOR TO THE INSTALLATION The accuracy is referred to 23°C± 5°C, <75%RH AC Current Meas. Range Resolution 0.1A 0.0 60.0A Overload protection: 72A AC/DC for 10s Accuracy (2.0%rd+5dgt) (50/60Hz) DC Current Meas. Range Resolution 0.1A 0.0 60.0A Overload protection: 72A AC/DC for 10s Accuracy (2.0%rdg+5dgt) AC Voltage Meas. Range Resolution Accuracy 0.000 3.400V 0.001V 0.01V 0.00 34.00V (1.5%rdg+5dgt) (50-400Hz) 0.1V 0.0 340.0V 1V 0 600V Input impedance: 10M ; Overload protection: 720V AC/DC for 10s DC Voltage Meas. Range Resolution Accuracy 0.001mV 0.000 340.0mV 0.001V 0.000 3.400V 0.01V 0.00 34.00V (1.5%rdg+4dgt) 0.1V 0.0 340.0V 1V 0 600V Input impedance: 10M ; Overload protection: 720V AC/DC for 10s Resistance and Continuity test 7. BATTERY REPLACEMENT When the " " low battery indication is displayed the batteries must be replaced as follows: 1. Switch OFF the meter 2. Remove the protection holster from the instrument 3. Remove the fixing screw and the battery compartment cover 4. Remove batteries and replace with new ones of the same type 5. Replace battery compartment cover and holster Meas. Range 0.0 340.0 0.000 3.400k 0.00 34.00k 0.0 340.0k 0.000 3.400M 0.00 34.00M Resolution 0.1 0.001k 0.01k 0.1k 0.001M 0.01M Sampling rate: approx 400ms (approx 20ms bargraph) Over range indication: “O.L” or “-O.L” symbols at display Power supply: 2x1.5V alkaline batteries type AAA LR03 UM-4 Auto Power OFF: after 10 minutes of idleness (not disable) Reference temperature/humidity: 23°C± 5°C (73°F ± 41°F) ; <75%RH Working temperature/humidity: 0 40°C (32°F 104°F) ; <85%RH Storage temperature/humidity: -20 60°C (-4°F 140°F) ; <85%RH Max height of use: 2000m (6562ft) Max diameter conductor : 6mm (0.2in) Dimensions (LxWxH): 128x87x24mm (5x3x1in) Weight (with batteries): 210g (7ounces) Included accessories: batteries, user manual Accuracy (1.0%rdg+3dgt) Buzzer active for R<30 10 Only on 340 range (5.0%rdg+5dgt) (15.0%rdg+5dgt) Frequency Meas. Type Meas. Range Accuracy Current 0 10kHz (0.1%rdg+1dgt) Voltage 0 300kHz Current sensitivity: 15A ; Voltage sensitivity: 30V Safety: IEC/EN61010-1, IEC/EN61010-2-031, IEC/EN61010-2-032 Measurement category: CAT III 300V , CAT II 600V, Pollution degree: 2 Insulation: double insulation Compliance with 2004/108/CE (EMC) and 2006/95/CE (LVD) Directives Display: LCD, ¾ dgt, 3400 points with bargraph 9.1 Warranty conditions This instrument is guaranteed for one year 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. Do not forget to enclose a report describing the reasons for returning (detected fault). Use only original packaging. Any damage occurred in transit due to not original packaging will be charged anyhow to the customer 9.2 Service Should the instrument not work properly, make sure that batteries are correctly installed and working before contacting your distributor, also check the test leads and replace them if necessary. 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. Do not forget to enclose a report describing the reasons for returning (detected fault). Use only original packaging. Any damage occurred in transit due to not original packaging will be charged anyhow to the customer. The manufacturer will not be responsible for any damage to persons or things. HT ITALIA SRL Via della Boaria, 40 48018 – Faenza (RA) – ITALY Tel: +39-0546-621002 Fax: +39-0546-621144 Web: www.ht-instruments.com Email: [email protected] ESP HT12 MANUAL DE INSTRUCCIONES 8. ESPECIFICACIONE TECNICAS ATENCIÓN 6. INSTRUCCIONES OPERATIVAS ATENCIÓN Campo medida 0.0 340.0 0.000 3.400k 0.00 34.00k 0.0 340.0k 0.000 3.400M 0.00 34.00M Resolución 0.1 0.001k 0.01k 0.1k 0.001M 0.01M DEU HT12 BEDIENUNGSANLEITUNG 2. ALLGEMEINE BESCHREIBUNG ACHTUNG 6.2 Strommessung mit Gabelstromwandler 4. INSTRUMENT UND ANZEIGE BESCHREIBUNG 340.0 3.400k 34.00k 340.0k 3.400M 34.00M Auflösung 0.1 0.001k 0.01k 0.1k 0.001M 0.01M
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Key Features
- Voltage and current measurements (AC/DC)
- Clamp sensor for non-intrusive current measurement
- Resistance measurement and continuity test
- Frequency measurement for AC current and voltage
- Large LCD display for clear readings
- Automatic power-off to conserve battery life
- Double insulation and overvoltage protection for user safety
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Frequently Answers and Questions
What types of measurements can the HT 12 perform?
The HT 12 can measure voltage, current (AC/DC), resistance, and frequency for AC current and voltage.
What is the maximum voltage that the HT 12 can measure?
The maximum voltage that the HT 12 can measure is 600V AC/DC between phases or 300V AC/DC between phase and ground.
How does the continuity test work?
The continuity test is always active and the buzzer sounds for resistance values below 30 ohms.