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The image you posted looks so much like a saw horse, I was confused as to its relative size, until I saw the 14" number. You might consider wandering around the hardware department of the local home building supply store checking out saw horses for one that might be easily convertible to your...

It's a big world with thousands of vendors and maybe someone makes a solenoid valve with a timer and counter, but I doubt it. You need a repeat cycle timer that will turn the solenoid on, then off, over and over again. Google repeat cycle timer. Its output contacts need to carry the...

You can google H2S toxicity for whatever area of the world you're in. In the US, OSHA limits are listed here: https://www.osha.gov/SLTC/hydrogensulfide/hazards.html With regards to diaphragms, I'm not sure what you're asking, but if the topic is fugitive emissions from valves, you might...

It might vary from model to model, but it appears that for some models that the value 100 unlocks access, any other number locks access. https://s17.postimg.org/myzd4aupr/Cerabar_PIN_number_100_for_unlock.jpg

1) In the industrial communications world, please specify number formats. Are the values 225 received in the reply [225] -MSB [225] - LSB decimal, octal or hexadecimal? 2) What are the question marks ? ? in the reply? The reply did not include ASCII value for a question mark, did...

http://lmgtfy.com/?q=Burner+management+sequence+control+tutorial

Where are the FF (Fieldbus is an end-all/be-all that just magically does all) pundits when they're needed? I don't do FF but the 475 manual has 20 pages (59-78 pdf) on getting FF to work...

I can think of 2 things. 1) A current signal needs a dropping resistor to create a voltage. If the input already had a 250 ohm resistor internally, but a 2nd 250 ohm resistor were wired across the input, the two in parallel is 125 ohms, which would create a 0-2.50V range or a 0.50-2.50V...

Does a Mark VI talk Honeywell DE protocol? The Honeywell Mulitvariable transmitter, the SMV3000, does not talk HART, it talks only Honeywell's DE protocol. You can connect a HART handheld, but it won't read anything. I suppose Honeywell could have licensed its DE protocol to GE. I...

I'm going to quote ABB's "Digital Outputs" app note because it is so well written, and it applies to almost all flow meters: Passive Outputs All WaterMaster digital outputs are passive Open Collector designs. (missing) Fig. 1 This requires a voltage be applied to the Open Collector...

A clamp-on ultrasonic transit time flow meter does not care about what the medium is or what its pressure is, because the flow meter only contacts the outside of the pipe, not the medium directly. Strap one onto your present piping, connect the power and signal wiring, commission it and get...

Shoot, it looks like you've already examined the converter. I was hoping for a jumper out of place. The way I read the photograph of the jumpers on page 20 is that jumpers 11-12 on the left, 1-2 on the far right. The exposed pins means unjumpered. Where the pins are not exposed means...

You need to get the manual for the USB-RS-485 converter. http://www.easysync-ltd.com/userfiles/editor/file/support/documentation/USB%20to%20Serial%20Converters%20Manual(2).pdf and check that the jumpers are set for RS-485 half duplex. It's a complex beast. Given your silence on the...

Hilton, I used that on-line calculator, but did not check the values it produced. So when you reported a 315 ohm resistance value for 850m of 16g wire, and it reported 3.63 ohms, I wondered which value was right. The table at this link says 1000m of 16g copper is 13.17 ohms...

I have a spec sheet for a P&F KFD2-STC4-2 That model is a dual channel isolator, providing isolation from one side to the other for two separate 4-20mA field instruments. Is it transparent to HART, meaning that HART is not stripped off/lost going through/across the isolator. It is not an...

I don't know the trick either. I have no Siemens experience. You might try looking through the Siemens app note for Modbus between an S7-1200 and an energy meter. It has references to both real (floating point) and UDint (unsigned double integer) formats. Go to this page, scroll down to...

There are several ways to find out whether Modbus RTU is present and enabled. 1) Sometimes the issue is evident in the device's configuration software. I've got one device on my work bench here that has both Modbus TCP or Modbus RTU slave functionality. The slave functionality needs to...

1) > number of start bits; I assume that it is set to 1 by default. Is this a reasonable assumption? Ans: Correct, always 1 start bit, it is rarely, if ever, settable to anything else. 2) Rotary switches SW1, SW 2 from the manual (with some edits): SW2 determines which protocol is in...

> i checked also modbus tcp with modscan software. i can get status, but with rtu i got response timeout error. If Modscan's master connects and gets a reply via Ethernet, but not via RS-485, the question is why? 1) Is RTU/485 communications even possible? Not all devices support...

I've never heard of this device, but here's several observations. If the USB/RS-485 converter's Tx LED turns on for a poll and the receiver's Rx LED turns on, then Modpoll is likely sending the message and the converter is on the correct COM port. The lack of any slave response could be...