Re: MKS 901p
Posted: Fri Jun 08, 2018 8:57 pm
Very late to this party, I just powered up my first MKS 901P. LED comes on red, then changes to green.
Analog output is +9.45 V whether at atmosphere, or me sucking on the hose, or connected to a vacuum spigot on the wall here.
My guess is that the analog output mode is not at factory default state, it's set to emulate some other transducer model that's pegged at full scale for my three test points.
Sounds like RS-232 communication is needed before more progress.
Did confirm that 901P connector pin 1, which they call Transmit, is putting out -4.5 V. That's a normal RS-232 level, as the device Marks time.
I think it corresponds to RxD in a traditional modem connection. Signal direction is from the DCE device (modem) to the DTE device (terminal, computer, or USB converter). It's called RD at both ends. Would be on pin 2 of a DE9 connector at both ends, right? Thanks!
Analog output is +9.45 V whether at atmosphere, or me sucking on the hose, or connected to a vacuum spigot on the wall here.
My guess is that the analog output mode is not at factory default state, it's set to emulate some other transducer model that's pegged at full scale for my three test points.
Sounds like RS-232 communication is needed before more progress.
Did confirm that 901P connector pin 1, which they call Transmit, is putting out -4.5 V. That's a normal RS-232 level, as the device Marks time.
I think it corresponds to RxD in a traditional modem connection. Signal direction is from the DCE device (modem) to the DTE device (terminal, computer, or USB converter). It's called RD at both ends. Would be on pin 2 of a DE9 connector at both ends, right? Thanks!