squints
Member
Hi all,
I have an automation direct pressure transmitter (QPSH-AP-42). It has a range of -14.5 psi to 145 psi, with the output at -14.5 psi being 4ma and the output at 145psi being 20ma. At 0 psi it outputs 5.45ma. My question is how do you scale this thing so it will read 0 psi when the pressure is 0 I have an automation direct 205 PLC with a DL250-1 processor. So far I have a value of 371 BCD at 0 psi, and I have not been able to figure out what number to use to scale it correctly. I pulled a vacuum on the transmitter and at -14.5 psi I get 0 BCD. Any help would greatly be appreciated!
I have an automation direct pressure transmitter (QPSH-AP-42). It has a range of -14.5 psi to 145 psi, with the output at -14.5 psi being 4ma and the output at 145psi being 20ma. At 0 psi it outputs 5.45ma. My question is how do you scale this thing so it will read 0 psi when the pressure is 0 I have an automation direct 205 PLC with a DL250-1 processor. So far I have a value of 371 BCD at 0 psi, and I have not been able to figure out what number to use to scale it correctly. I pulled a vacuum on the transmitter and at -14.5 psi I get 0 BCD. Any help would greatly be appreciated!