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EHELP: We need a relay that can withstand high DC current at high voltages

EHELP: We need a relay that can withstand high DC current at high voltages

Q: My Model 330R process monitor with display has configurable threshold output relays that I need to set in order to activate a 125Vdc battery powered circuit which is part of a failsafe control room application. How would I set these up when standard instrument relays are rated at 125/240Vac and 24Vac/dc?

Published: May 23, 2016

EHELP: Can we run a pneumatic chart recorder with an IPT2 or IPX2 Current-to-Pressure Transmitter?

EHELP: Can we run a pneumatic chart recorder with an IPT2 or IPX2 Current-to-Pressure Transmitter?

Q: We need to combine a new system for reading tank levels with an existing system by replacing a Hagan instrument with a new Rosemount device. However, we need to ensure we can still run an existing 3-27psi pneumatic chart recorder. We’re considering using an I/P, but aren’t sure if the 4-20mA output from the new transmitter can be piggybacked. Is this possible?

Published: May 3, 2016

E-HELP: Can multiple 4-20mA signals be placed on one 4-20mA signal as HART dynamic variables?

E-HELP: Can multiple 4-20mA signals be placed on one 4-20mA signal as HART dynamic variables?
Q: You have a product called HART Interface Module (HIM) that will pull the 2nd, 3rd and 4th HART variables from a transmitter signal and create one 4-20mA signal for each. Do you have or know of an instrument that will take multiple 4-20mA signals and output them on one 4-20mA signal as HART dynamic variables?
Published: April 19, 2016

EHELP: What is the Environmental Rating of the R-BOX?

EHELP: What is the Environmental Rating of the R-BOX?

Q: We have an R-BOX in a Class 1 Div 2 location with a 120VAC instrument inside. Is this enclosure rated for this atmosphere? It does not appear to have a very good seal for this environment.

Published: March 29, 2016

EHELP: Alarm Tank Level Changes with the SPA2

EHELP: Alarm Tank Level Changes with the SPA2
Q: I want to install a 4-20mA pressure transducer that shows the tank level with an alarm to alert if it is outside the controlled level. With the same signal I want to display the level, alert of level loss, and shut down the pumps if the level reaches a critical point.
Published: March 8, 2016
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