| 摘要 |
Digital multimeter -counter with possibility of processing with or without use of the special circuit for sample and hold according to the invention, represents a new solution achieved by application of microprocessor æP and special circuits for analogue - digital conversion A/D, of memory circuits (EEPROM and RAM) and LCD display (DISPLAY) mutually connected in the same way so that the microprocessor æP over R/W line for data reading and input DL, connects with DISPLAY, which during the operation of device displays measured effective values of voltage and current in distributive network, i.e. measured power of active loading and frequencies of carrying signal, while by the keyboard TASTER, selection of desired output of results is done. Data on measured value of the voltage, i.e. current are over RxD and TxD lines drawn to the personal computer where detailed processing and display of results can be carried out and even when remote from the test site. |
