Binghamton, NY Nov 10, 2009 #seven I am not familiar with meter operation, but I might suspect that it needs to send the switching voltages (13v for odd and 18v for even). And, if you'll want to see the other sats it should mail the 22khz tone. I will conceed https://scrapbox.io/dienphucthinh22-18558335/cap_quang_panduit_chinh_hang