Binghamton, NY Nov 10, 2009 #seven I'm not acquainted with meter Procedure, but I'd suspect that it really should mail the switching voltages (13v for odd and 18v for even). And, if you might want to see one other sats it needs to ship the 22khz tone. Based on Joe https://dienphucthinh22.wixsite.com/home/post/cap-tin-hieu-rs-485