ENGLISH User manual Copyright HT ITALIA 2013 Release EN 1.
HT8000 Table of Contents: 1. SAFETY PRECAUTIONS AND PROCEDURES .......................................................... 2 1.1. Preliminary............................................................................................................. 2 1.2. During use ............................................................................................................. 3 1.3. After use ..............................................................................................................
HT8000 1. SAFETY PRECAUTIONS AND PROCEDURES 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 . When taking measurements: Avoid doing that in humid or wet places. Avoid doing that in rooms where explosive gas, combustible gas, steam or excessive dust is present.
HT8000 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.
HT8000 2.
HT8000 4. OPERATING INSTRUCTIONS 4.1. INSTRUMENT DESCRIPTION LEGEND: 1. +LOOP jack 2. mA jack 3. COM jack 4. V jack 5. POWER key 6. V/mV key 7. mA/% key 8. INPUT/OUTPUT key 9. Arrow key for increase most significant digits 10. Arrow key for decrease most significant digits 11. Arrow key for increase decimal digits 12. Arrow key for decrease decimal digits 13. Low battery indication 14. “INPUT” mode indication 15. “OUTPUT” mode indication 16. LCD display 17. Voltage measurement unit 18.
HT8000 4.2. FUNCTION KEYS DESCRIPTION 4.2.1. POWER key Press the POWER key for switch on/off the instrument. The reference of the last selected function is displayed. 4.2.2. INPUT/OUTPUT key Press the INPUT/OUTPUT key to select the mode of the measurement of the parameters (INPUT) and the generation of signals (OUTPUT) performed by the instrument. The “INPUT” or “OUTPUT” symbols are displayed.
HT8000 4.3. FUNCTIONS DESCRIPTION 4.3.1. DC Voltage measurement CAUTION Maximum input for DC voltage is 30V. Do not attempt to take any voltage measurement that exceeds the limits. Exceeding the limits could cause electrical shock and damage the multimeter Fig. 2: DC Voltage measurement 1. Press INPUT/OUTPUT key and select the measurement mode. The “INPUT” symbol is displayed 2. Press V/mV key and select the desired measurement unit. The symbol “V” or “mV” is displayed 3.
HT8000 4.3.2. DC Voltage generation CAUTION Maximum input for DC voltage is 30V. Do not attempt to take any voltage measurement exceeding such limit to avoid the risk of electrical shock and damages to the instrument. Fig. 3: DC Voltage generation 1. Press INPUT/OUTPUT key and select the generation mode. The “OUTPUT” symbol is displayed 2. Press V/mV key and select the desired measurement unit. The symbol “V” or “mV” is displayed 3. By means arrow keys and (see Fig.
HT8000 4.3.3. DC current measurement CAUTION Maximum input for DC current is 24mA. Do not attempt to take any current measurement exceeding such limit to avoid the risk of electrical shock and damages to the instrument Fig. 4: DC current measurement 1. Switch OFF the circuit under test 2. Press INPUT/OUTPUT key and select the measurement mode. The “INPUT” symbol is displayed 3. Press mA/% key and select the desired measurement unit. The symbol “mA” or “mA%” is displayed 4.
HT8000 4.3.4. DC current generation CAUTION The maximum DC current generated by the instrument is 24mA with DC voltage of current generator max 24VDC Fig. 5: DC current generation 1. Press INPUT/OUTPUT key and select the generation mode. The “OUTPUT” symbol is displayed 2. Press mA/% key and select the desired measurement unit. The symbol “mA” or “mA%” is displayed 3. Insert the red plug into +LOOP jack and the black plug into V jack 4.
HT8000 4.3.5. Loop current measurement of external transducers CAUTION In this mode the instrument generate a fixed output voltage of 24VDC which permits to supply an external transducer and perform the simultaneous current measurement on it Maximum input for DC current is 24mA. Do not attempt to take any current measurement exceeding such limit to avoid the risk of electrical shock and damages to the instrument Fig. 6: Loop current measurement of external transducers 1.
HT8000 4.3.6. Simulating of a transducer CAUTION In this mode the instrument generate a output current up to 24mADC. It is necessary the use of a external power supply with 30VDC maximum voltage to perform the adjustment of the current Fig. 7: Simulating of a transducer 1. Press INPUT/OUTPUT key and select the generation mode. The “OUTPUT” symbol is displayed 2. Press mA/% key and select the desired measurement unit. The symbol “mA” or “mA%” is displayed 3.
HT8000 5. MAINTENANCE 5.1. GENERAL INFORMATION 1. This is a precision instrument. To guarantee its performances be sure to use it according to these instructions and keep it stored on suitable environmental conditions. 2. Do not expose it to high temperatures or humidity or direct sunlight. 3. Be sure to turn it off after use. If you expect not to use the instrument for a long period remove batteries to avoid leakages of battery liquid which could damage the its inner components. 5.2.
HT8000 6. TECHNICAL SPECIFICATIONS 6.1. TECHNICAL FEATURES Accuracy calculated as [%rdg + (no. dgt x resol.)] at 18°C28°C (64°F 82°F), <75%RH DC Voltage (measured and generated) Range 0.01100.00mV 0.00110.000V Resolution 0.01mV 0.001V Accuracy Input impedance Overload protection (0.02rdg +2dgt) 2M, <100pF 30VDC Percentage value 0% = 4mA 100% = 20mA 125% = 24mA Overload protection DC Current (measured and generated) Range 0.00124.000mA Resolution 0.001mA -25.00 125.00% 0.
HT8000 7. SERVICE 7.1. 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.
