Search results

You need a positioner with Fieldbus communications, not an actuator. The actuator does the "heavy lifting" mechanics that positions the valve stem. A positioner tells the actuator where to go and senses position by feedback to ensure compliance. 'Fieldbus' is a generic term, Foudation...

Rosemount download site for DTMs for Rosemount instruments. http://tinyurl.com/qe6cfy8

> And the max range of orifice is 120 m3/hr if my DP is 20mA then is my flow equals to 120m3/hr? Ans: yes The local display reads DP The 4-20mA output = 0-100% flow rate = 0 - 120 m3/hr Configure whatever your receiver (indicator/totalizer/recorder/PLC/DCS) is for 0 - 120 m3/hr and...

Every 3051 has a parameter to convert the output of configured DP range from a linear DP output to 0-100% flow rate by extracting the square root. The parameter is called transfer function or xfer fnctn. The setting choices are linear or square root (Sq Root). I can't recall whether the...

I haven't a clue what your supplier actually provided. You need to ask them to be very specific about what they've delivered to you. One would hope that they've configured it for 0-100% output, density compensated for your specific tank dimensions, but who knows?

Presumably this is liquid CO2 in a pressurized vessel? You probably have the wrong DP pressure transmitter if you can scale its output to 35 bar differential. The DP transmitter does have two ports, a high side and a low side, right? (a single port is a gauge or absolute pressure...

Agreed, Curt does give great explanations. Oscilloscope for RS-485 differential signals - need a dual channel scope - use 'add' mode (ch 1 and ch 2) - invert ch 2 so the result is ch 1 minus ch 2 (or vice versa, invert ch 1)

In a word, yes. For a graphic illustration of such, look here: http://tinyurl.com/o6mbtwm For another explanation, try here: http://tinyurl.com/qhft4my

90 page note on EGD protocol: http://tinyurl.com/ouhg4rs

I just thought locating the PT static pressure tap at the high side DP tap and keeping a thermowell bluff body outside the meter run where the flow profile is developed made sense. But I'd seen someone mention a standard and managed to find Rosemount's Cahill's blog where he says a tee at the...

Most all modern level instruments can be configured to indicate a high or a low level (or sometimes a specific intermediate level) if the instrument's detection circuits fail to get any reading or if the reading is of very low confidence. Is this unit configured for 'fail high' at 100%? I...

The Azbil SVP3000 'smart' positioner is a HART 4-20mA current pneumatic valve positioner. The only air 'inlet' on this (or any electropneumatic) positioner is supply air. The control signal is an input to the positioner. The positioner's pneumatic OUTPUT drives the actuator, not the...

The inlet air is has a mechanical pressure regulator somewhere upstream. The changes in pressure could be a) a regulator not sized properly for the load b) a properly functioning proportional-only regulator and the changes in output pressure reflect the 'droop' inherent in varying flow...

Thermowells are downstream of the orifice beyond the meter run length. Before multivariables when using a flow computer, I tapped the absolute static pressure transmitter in at the orifice plate's upstream differential pressure tap in the flange union.

Tables A-1 and A-2 on pages 118-119 of the 3051 manual shows the LRL and URL range 'limits' (not range values LRV and URV) for 'range 2' to be -250in H2O to 250in H2O, as you have pointed out. http://www2.emersonprocess.com/siteadmincenter/PM%20Rosemount%20Documents/00809-0100-4001.pdf...

whoops, it's late. Correction to my previous post: 0406h is 1030 decimal. The one offset might be interpreted as 1031 decimal.

The DSE-7300 operator manual shows setting the Modbus slave address and the baud rate on page 70 (pdf). Apparently it takes some software to change the settings (maybe even to see them?) The spec for the comm ports (in section 3.10) says the 485 port is half duplex (2 wire + common). No...

Providing a list of suggested topics to your intended audience is a great technique to spur a conversation, 'is anything on this list worthwhile?" or "what else would you like to get some training on?" If you've got a really good vendor, you might off-load some training onto a vendor guy (and...

Isn't the EDDL the 1-2Mb file, a DTM or DD file, that defines the objects in a specific model that is loaded into the software and used to communicate with that model instrument? Or is it some other file? Maybe it's not a HART file ? ? If it is the HART DD file, and assuming the mfg saved...