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No, when the transducer's direct range (-1 to 2 bar) differs from the reported range (-1 to 1 bar), the reported range is indirect.

Borrowed from Anderson Instrument's FF transmitter manual (my comments in parentheses) Direct: By setting to DIRECT, the AI output will be identical to the Transducer Block (configured range and engineering units, for instance mmH2O values from a DP level transmitter) . Indirect: By...

No one here can see your installation. We only know what you tell us, which thus far, is practically nothing (your level sensor has a problem). You need to tell us a lot more if you want us to help. Did any level sensor ever work properly in this installation? Is this a newly installed...

Inlet pressure to the valve changes. With the controller in manual mode holding the valve at a fixed, given position, the changing inlet pressure results in a changing DP across the valve which results in a changing flow rate, as reflected in the vortex readings.

Most, if not all, flow meters have a setting called something like "Low flow cutoff". When the flow rate is below the low flow cutoff, the flow meter reports a flow rate of zero. The totalizer uses the flow rate value, which if it is zero, adds nothing to the total. Reduce the low flow...

To get a flow reading that is meaningful, the pipe needs to be full of liquid. The requirement for a full pipe for flow measurement is assumed, so sometimes a statement to that effect is omitted from flow element or flow meter spec or data sheets. The original Dietrich Standard spec sheet...

Without knowing what the function of terminals 1, 2, 3 and 4 are, it's not possible to determine what a wiring problem might be. But you should be aware that 2 wire, loop powered transmitters only have have DC power on 2 terminals, not 4 terminals. Is your transmitter a 2 wire, loop powered...

Not surprising, different alloys have different resistances. There are tables with resistance per foot or per meter for T/C wire.

See the blog on this topic at the link below: http://tinyurl.com/mtaqm6f > Can I connect a transmitter and convert to 4-20 ma and > run the three controllers in series? Are there other options? Yes, but . . . . Depends on how much (analog input) resistance the transmitter can drive...

Guys who live in cubes write the code. Hence, it depends on whether the guy who wrote the code starts counting from zero or from one. I find, in general, that those registers listed in Hexadecimal indexed addressed tend to start counting at zero, whereas those stating the addressing in...

Another control.com thread http://control.com/thread/1336501913 involved back calculating when Type T measurement equipment and Type J sensor elements were used. Yours involves Type J measurement equipment and Type K sensor wire. Reference that thread and where it says Type T...

Your bubbler can not 'see' any head pressure lower than its elevation, so you can not measure any of the 200mm depth below the bubbler tube. The way it's installed, the transmitter's measurement output will span 0-4800mmH2O. You can change the URV to 4800 or you can leave the URV at...

If it were me, I'd connect a PC with a serial port running a generic Windows Modbus 'test' master, like Modscan32 or SimplyModbus, and confirm that the slave device, the turbine, does indeed, speak Modbus and under what settings/connections it does so. Sometimes electrical connectors have...

Look at the principle of operation and internal diagrams of a Bellofram Type 1000 I/P. It does not use bellows. http://tinyurl.com/p6rx6hh http://preview.tinyurl.com/p6rx6hh An given design uses what it uses. What's the issue with a bellows?

Was the former device communicating properly right up until it was replaced or is the replacement attempting to fix a communications problem? Both controllers have the same brand name, but is the replacement an exact replacement for the former? Changing model numbers can very well mean...

Mr. Linse, What's a rule-of-thumb value for RTU-TCP latency in a Digi Modbus bridge product? David

Other types of actuators use two drive signals: - one signal drives the actuator 'open' - the other signal drives the actuator 'closed' The actuator drives in whichever direction the signal tells it to for as long as the signal connection to that terminal is 'made'. The control scheme...

An analog output can't very well handle a totalizer value because of the lack of dynamic range on a -20mA signal. What type of value are you looking for from the flow computer? Does the flowcomputer have a 232 port? Which protocol does it talk on that port?

You know - the word size, 11 bits - the number of words in the master message - silent interval of 3.5 characters to denote the start & end of message - baud rate - the slave response message size There's some latency in the RTU/TCP conversion, so pick a value for that and you can...

> Since registers are always 16 bits, does it even make sense to provide data types of 8 bits length? Well, since the Modbus function codes 03/04 are always going to read a register of 16 bits, you need to 'pack' your 8 bit word to fit a 16 bit register. > I saw many devices where one...