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The 475 is a handheld communicator that acts as a HART master. I am unaware of any 475 function to simulate a process variable when the 475 is not even connected to a field device. But considering the cost of a 475, you can buy a HART pressure transmitter and a temperature transmitter for...

Sounds good to me, unless the transmitter uses Foundation Fieldbus or Profibus, neither of which use 4-20mA.

a) >J8, J11 identity The manufacturer's documentation is the source for an accurate description of Jx connector functionality and pinout. b) >does anyone had the description off the point and the address? Communications takes at least 2 devices. You mentioned Intellisys controller, but...

They are not called 'multimeters' (DVM or VOM that an electrician uses), because they source current or voltage. Try searching for: 4-20mA loop calibrator

20-COMM-S (RS-485 DF1 Adapter) manual here: http://literature.rockwellautomation.com/idc/groups/literature/documents/um/20comm-um005_-en-p.pdf pg 16 states: Important: If the Data Rate switch is set to “PGM” (Program), the adapter will use the setting of Parameter 03 - [DF1 Addr Cfg] for...

1) Pactware uses a HART modem. Pactware requires DTM files (not DD files) but I think Krohne's Pactware version supports common Rosemount transmitters. 2) A single tag version of Siemens PDM software at about $100 US uses a HART modem and it supports a number of Rosemount transmitters.

I've never worked with Modbus Plus, but I understand that it supports multiple masters via token sharing. The proposed operational scenario sounds to me like two Masters sharing a token, the one who holds the token acts as master, the one who lacks the token is silent (or maybe functions as a...

In the US, Modbus RTU runs over wireless serial modems that have with 19k baud over-the-air throughput rate. But Modbus/TCP can be carried by 900MHz industrial ethernet wireless radio modems at 400-500K baud throughput with better range and punch through than 2.4GHz WiFi. Are you sure this...

> With DP transmitter I get differential pressure, but I must and want to get only gauge pressure. All pressure measurement is a differential measurement, differential where the high side is referenced to a low side. It's like a volt meter with two leads. The voltage measurement is the...

If you've decoded the model number correctly and the transmitter is truly a model TA gauge pressure transmitter, then ranging the URL to -14.7 psi (or -1.0kg/cm^2) will show an elevated mA output when the port is open to atmosphere. The HART indication of zero for LRL is just wrong for a...

I wonder if you have a TG or a TA model. The US Rosemount spec sheet for the 3051Tx in-line transmitters is here: http://tinyurl.com/789h3zm or http://preview.tinyurl.com/789h3zm The range specs are on page 10 in two columns, one column for the gauge pressure TG model, a 2nd column for...

You asked essentially the same question on Jan 16th. http://www.control.com/thread/1326698405 There were numerous replies in a couple threads. What is not clear about extending the impulse tubing length?

Facts: 1) double square rooting, at both the transmitter and receiver produces substantial flow rate error. 2) Failure to square root a DP signal at either the transmitter or receiver produces substantial flow rate error. My opinion is that 1) it matters not whether the square is...

Is there a standard for your industry or application? The United States' Bureau of Land Management has a standard (and API has a standard): <quote>Unless otherwise approved by BLM, the low flow cutoff shall not be set higher than 1.5 times the manufacturer's basic uncertainty specification...

A summary of loop calibration vs individual calibration from Mike Cable's book: Calibration: A technician's Guide (published by ISA) is here: http://tinyurl.com/8y8vv4y The article summary lacks the two comparison tables of advantages and disadvantages of each approach, but the preview of...

The 'treat system as a whole' is sometimes called a loop calibration. As you seem to indicate, for those who accept a loop calibration it doesn't matter if the analog output is slightly off and/or the analog input is slightly off as long as the final reading of an injected, calibrated...

export as .csv Import to Excel. Chart in Excel.

Impulse tubing for steam is generally filled with water from a condensate pot. The water isolates the instrument from the steam. Instrument is mounted below the steam line. Rosemount has an app note showing direct mounting a DP transmitter on a coplanar manifold on a steam line. link here...

Re-read the textbook. You're missing the setpoint circuit and a comparator.

Who will pay to replace functional instruments?