Binghamton, NY Nov ten, 2009 #7 I am not acquainted with meter operation, but I would suspect that it really should send the switching voltages (13v for odd and 18v for even). And, if you might want to see one other sats it needs to send out the 22khz tone. https://telegra.ph/thiet-bi-chong-set-lan-truyen-val-phoenix-contact-05-17