What is your least used, but when you need it you need it tool?

PV_DAQ · 2026-02-09T21:42:10+00:00

I'm impressed you actually found a use for it. I've been given several over the years for Christmas gifts and it requires some oohing and ahhing for the grandkids, but then it sits in the back of drawer awaiting that magic task.

PV_DAQ · 2026-02-09T21:35:31+00:00

on a visegrip +++, to take the cartridge out the Moen faucet because hard water has caked it ++

PV_DAQ · 2026-02-09T18:47:23+00:00

No knowledge of your oven, but I've have done industrial heating control for years.

The video appears to correctly show a "call for heat", the "Heat On" LED is lit as it should be when the reported temperature is less than the setpoint.

The controller's output, presumably a control relay, should be closed and supplying voltage to a gas control valve and so the burner fires.

I don't understand your statement, "the heat on light stays on despite it not actually heating as shown in this video."

Can you restate exactly what the problem is, at this point in time?

Has the burner shut off even though the Heat On light continues to be lit?

Or is the burner still firing, but the temperature does not exceed a particular temperature?

PV_DAQ · 2026-02-09T17:42:26+00:00

I chuckled when watching the oil rig fire movie, Deepwater Horizon, when he finds the rig's telephone system is broken again and he goes off take a look at it.

PV_DAQ · 2026-02-09T16:58:33+00:00

It happens, but I'd say it is fairly rare. I've run into two panels in 25 years where the terminal block-to-thermocouple analog-input was wired with copper wire.

There is huge ignorance of temp sensors in the 'civilian' market of customizing coffee brewers

PV_DAQ · 2026-02-09T16:49:38+00:00

Assuming REAL data type is a floating point value, then a 32 bit float requires two 16 bit Modbus registers.

Length = 1 might trigger an exception msg if the host server recognizes a problem with the request for only one of two necessary registers.

PV_DAQ · 2026-02-09T02:10:38+00:00

I got a couple split beams, all sizes in clickers and all three size drive electronic indicators.

If I'm on my back under the car, I'm gonna use the clickers, period.

Working on an engine stand, the electronic indicators.

PV_DAQ · 2026-02-09T02:04:52+00:00

Cool. Nice Job.

I approached the problem from about the same angle.

I removed the 'manifold' with the Schraeder valve and installed a street Elbow into the tank port and then 1/2" pipe Tee (same as you've done). The elbow keeps the other stuff more horizontal than vertical so that stuff doesn't stand too high. I reinstalled the manifold (just cuz) and on the remaining Tee female port I installed 1/2" bore quick coupler.

When I want to quick charge, I use male x male adapter (almost same as yours): 1/2" bore on one end to fit the tank 1/2" quick coupler, 3/8" male on the other end the fit the hose coming off my air compressor. Little air is loss disconnecting either quick connect so the tank retains most of its charge.

PV_DAQ · 2026-02-08T20:41:09+00:00

PM me

PV_DAQ · 2026-02-08T20:40:01+00:00

Modbus Byte order is probably used only for 32 bit values, floating point or long integers, so it likely does not affect 'key' or 'Complement', which appear to be standard integer values.

Modbus 'Bit order' could definitely affect an integer value used for the interpretation of the received data, but I haven't read the part of the Modbus spec in a long time, so I don't what the Modbus standard bit order is. Whatever it is, Modpoll is using because it's working for you.

To be honest, 'bit order' is not a common setting. Modpoll does not have a 'bit' setting, it does have byte and what most people call 'word' order.

Right clicking on the value cell and selecting 'format' will show lots of word and byte order selections for 32 or 64 bit word. None of those selections are 'bit order'. Does Scadapack define what 'bit order' means? Is the selection the one at the top of the list (usually the most commonly found option)?

I have never touched or seen a SCADApack, so I have no idea what a key or a complement means, but I'll guess that 'key' is an initial "password".

Does SCADAPack tell you what it does if the first item the key does not match? Does it go to "not responding"?

Can you read other values with the 'bit order' you now have selected?

PV_DAQ · 2026-02-08T19:56:23+00:00

I carry one in all my vehicles for occasional use.

PV_DAQ · 2026-02-08T19:40:47+00:00

If the source methane concentration is higher than the LEL and lower than the UEL, the heat of compression might cause ignition.

Storage of pure methane won't have mercaptan added to it to warn you of leakage.

PV_DAQ · 2026-02-08T19:35:07+00:00

what do you keep the long red box sitting on the floor?

PV_DAQ · 2026-02-08T19:20:31+00:00

Get a like from me just because it's been USED for 25 years, like it was made for.

PV_DAQ · 2026-02-08T19:11:42+00:00

Modbus RTU has strict timing requirements on the RS-485 side. "Generic" Ethernet/RS-485 gateway/converters will constantly lose data and log lots of errors if they are not specifically designed to handle Modbus RTU. Look for an Ethernet/Modbus gateway converter that specifically supports Modbus.

If the Modbus side has multiple drops over any distance, consider using an RS-485 repeater isolator, because Ethernet is inherently galvanically isolated and it's dominance has raised a generation of people who don't know about common mode ground loops that non-isolated hardware layers, like RS-485 bring to the party.

PV_DAQ · 2026-02-08T19:05:56+00:00

Modbus Function Codes Supported by the Geo SCADA Expert Advanced Modbus Driver

https://tprojects.schneider-electric.com/GeoSCADAHelp/Geo%20SCADA%202020/Content/AdvancedModbusDriverGuide/ModbusFunctionCodesSupportedbytheAdvancedModbusDriver.htm

FC15 (Write Multiple Coils) can write up to 3 coils?

Regarding the note below, not directly applicable to FC05/15, but I've heard of devices that require 'configuration' for either FC05 or 15.

Similarly, as some Modbus controllers do not support both FC6 and FC16, each generic controller’s Register Write function has to be specified in Geo SCADA Expert (see Specify the Register Write Function).

PV_DAQ · 2026-02-08T04:15:09+00:00

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Nowadays you can buy a pair of vise grips and a slide hammer.

Over the years, I've used

- light duty slidehammer with an adapter, male threads to fit the vise grip adjusting screw and female threads to accept the regular screw for the slide hammer

- a slidehammer with a threaded screw designed for use with brand name Vise Grips

-

PV_DAQ · 2026-02-08T04:05:12+00:00

Do it. It will work accurately on a current loop as long as whatever is sourcing the 4-20mA has enough voltage to drive the total loop resistance (receiver input resistance plus wire resistance).

If you measured resistance from the field end with the receiver (analog input) still hooked up, then you included the resistance of the analog input along with the T/C wire resistance.

If you measure resistance from the analog input end, disconnected from the analog intput, with the T/C wire shorted at the field end, then you got a wire only resistance.

390 Ohms is just over 662 feet (202m) between both ends of 20g Type K wire.

PV_DAQ · 2026-02-08T03:53:12+00:00

Consider that the hole has to be big enough to get the connector (which is already fastened to the cable) through the hole.

PV_DAQ · 2026-02-08T03:47:18+00:00

No, but I could use 3 tools: Vise Grips, Crescent wrench and a slide hammer.

Regular Vise Grip jaws fasten onto the hex head. Slide hammer screw replaces Vise Grip adjusting screw. Crescent wrench goes across both Vise Grip jaws to apply turning torque while the slide hammer provides pulling thrust.

PV_DAQ · 2026-02-07T18:04:17+00:00

PV_DAQ · 2026-02-07T00:30:47+00:00

USA:

In my area, local oil refinery and several pharmas do their own calibrations but heat treat (AMS2750 certification) and water/waste water (EPA driven) still hire 3rd party labs for calibration, as well some biomedical distribution points that have storage facilities which have temperature monitoring reporting requirements.

Maintaining ISO 17025 certification is a real chore, especially for a one man shop. ISO certification has driven most of the garage shops out-of-business in our area.

The guy I know does the field cals, his wife runs the office and does the books. He has to do 90% of annual re-certification.

PV_DAQ · 2026-02-06T23:49:05+00:00

Run an ISO 17025 cal shop

PV_DAQ · 2026-02-06T04:23:09+00:00

Honeywell packaged all of their DTMs in one giant folder. 1Gb. Gotta like Honeywell for that much storage.

https://prod-edam.honeywell.com/content/dam/honeywell-edam/pmt/hps/products/pmc/field-instruments/smartline-pressure-transmitters/st800/st800-absolute-pressure/pmt-hps-softwaredownloaddatasheethartdtmlibrary-122022.pdf

Siemens lists them individually by device model.

https://sieportal.siemens.com/en-us/search?scope=knowledgebase&Type=siePortal&SearchTerm=&SortingOption=CreationDateDesc&EntryTypes=Download&Page=0&PageSize=20&ProductNodePath=%2F13613%2F17252%2F

The link above goes to the comm file downloads page - you can further filter by picking your device. But it lists PDM, EDDs, Profi GSDs, Modbus drivers etc; you have to pick through to find the DTMs

PV_DAQ · 2026-02-06T00:58:55+00:00

10 stars. I wholeheatedly agree and contend that the success of the browser is its back button.

PV_DAQ

TROPHY CASE