Fluke 437-II Manual - Page 99
Mains Signaling,
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Chapter 20 Mains Signaling Introduction Mains Signaling is a function available in Fluke 435-II and 437-II. Power distribution systems often carry control signals to switch appliances on and off remotely (also known as ripple control). These control signals have a frequency that is higher than the normal 50 or 60 Hz line frequency and range up to about 3 kHz. Amplitude is significantly lower than that of the nominal line voltage. The control signals are present only at the moments that a remote appliance has to be controlled. In Mains Signaling mode the 435-II and 437-II can capture the occurrence (signal level) of control signals with 2 different frequencies. The frequency range is 70.0 - 3000.0 Hz for 60 Hz systems and 60.0 - 2500.0 Hz for 50 Hz systems. Selection of Frequency 1 and frequency 2 is attainable via key sequence SETUP, F4 - MANUAL SETUP, select Limits with the up/down arrow keys, ENTER, F3 - EDIT, select Mains Signaling with the up/down arrow keys, and press ENTER. Next use the arrow keys to adjust Frequency 1 and 2. The Duration of the measurement and Immediate or Timed start are selectable after a measurement is set from HOLD to RUN. Measuring results are presented in a Trend screen and in an Events Table. Note: Mains Signaling is not available for measurements in 400 Hz power systems such as offered in Fluke 437-II. 20-1 MyFlukeStore Shop for Fluke products online at: www. .com 1.877.766.5412