Fluke 1625 FE 1625 Users Manual - Page 39
Safety Control Measurements, Measurement of Interference - Voltages and Frequencies
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Earth/Ground Tester Procedure of Measurements Safety Control Measurements Before each measurement the instrument automatically checks the measuring conditions and, while simultaneously displaying the kind of error, prevents measurements from being started under the following conditions: • excessive voltage on the sockets (> 24 V in RE and R~; > 3 V in RF) • wrong or incomplete connection • Problems during the measuring sequence (display "E1 ... E5") see display description in the section 'Procedure of Measurements'. • Battery voltage too low ( display LO-BAT ) Measurement of Interference - Voltages and Frequencies This measuring function detects possible interference voltages and their frequencies. This function is automatically active in every switch position before an earthing or resistance measurement. If the pre-set limit values are exceeded, the interference voltage is indicated as too high and a measurement automatically prevented .The frequency of an interference voltage is only measurable if the level of this intereference voltage is higher than 1 V. See Figure 7. Bring central rotary switch in desired position, read out measured value of interference voltage, measured value of interference frequency is displayed with "DISPLAY". 31