Which standards do the LOGOS automation calculators use?

Temperature conversion follows ITS-90 (IEC 60584-1) and IEC 60751, thermowells follow ASME PTC 19.3 TW, flow measurement follows ISO 5167 and ISO 6817, fieldbus checks follow IEC 61158-2 and the PROFIBUS, Ethernet-APL and ODVA guidelines, and logic follows IEC 61131-3. Each result cites the clause used.

Can I use the automation calculators without an account?

Yes. Seven of the 13 — thermocouple and RTD, thermowell, flow meter, dP accuracy, 19" rack, relay logic and Ladder — run directly on their public page, in the browser. An account saves the calculation in a project and downloads the Word report.

Does LOGOS generate a calculation report for instrumentation?

Yes. Every automation calculator generates a Word (.docx) report with the inputs, formulas, limits and verdict per item, ready for the instrument file.

instrumentation and networks · ITS-90 · ASME PTC 19.3 TW · IEC 61158-2

Instrumentation and industrial networks, checked by the standard — not by the vendor brochure.

Check thermowells, flow meters and dP accuracy, convert thermocouples and RTDs, size PROFIBUS, Ethernet-APL, DeviceNet and ControlNet segments and test relay and Ladder logic — with the formula and the clause on screen and a calculation report in Word for the instrument file.

Create free account See the calculators ↓

13: calculation routines
20+: standards and guidelines cited
7: run with no sign-up
.docx: report ready to sign

Your network budget and thermowell check live in a spreadsheet and three vendor tools that do not talk to each other. Which one is right?

One tool per brand

Each fieldbus vendor ships its own planner, locked to its own products. A mixed segment ends up checked in none of them — or in a spreadsheet nobody can audit.

The datasheet is not the check

A thermowell that fits the nozzle can still resonate at the wake frequency. A meter at line size can still run below its velocity band. The catalogue does not tell you.

No record for the instrument file

Cable lengths, voltage at the last device, wake-frequency ratio: numbers that go into the project with no trace of how they were obtained.

From the instrument list to the report, in three steps.

01
Enter the instrument or the segment

Process data, cable types and lengths, devices and their consumption — the same data you already have in the instrument list and the network drawing.
02
Check against the standard

ITS-90 and IEC 60751 for temperature, ASME PTC 19.3 TW for thermowells, IEC 61158-2 and the PROFIBUS and Ethernet-APL guidelines for networks. Every limit is cited.
03
Download the report in Word

A calculation report with the formulas, the limits and the verdict per item — ready to go into the instrument file and the network documentation.

What you check here.

All 13 calculation routines, already available in the workspace — 7 of them run on the public page with no sign-up.

Field instrumentation

Industrial networks

Panels and logic

Every network and instrument check in one place — not one tool per brand.

Vendor planners are free but tied to their own catalogue; spreadsheets are flexible but unaudited. LOGOS checks mixed segments and instruments by the published standard, in the browser.

Feature	LOGOS	Excel spreadsheet	Vendor planning tool
Price	Free to start	Free	Free, one brand
Calculation report in Word	✓	✕	sometimes
Standardized, citable methods	✓	depends on who built it	✓
Traceability and versioning	✓	✕	partial
Nothing to install (web)	✓	✓	✕
Works across brands	✓	✕	own products only
Methods per IEC, ISO and ASME	IEC · ISO · ASME	—	vendor rules
Learning curve	minutes	inherited and fragile	one tool per brand

Informative comparison, based on the typical use of each alternative. “Vendor planning tool” refers to the network and instrument planners each manufacturer distributes for its own products.

Every limit has a clause behind it.

No black box. Each check follows a published standard or design guideline, cited in the report — the same documents inspectors, integrators and vendors work from.

ITS-90 · IEC 60584-1
IEC 60751
ASME PTC 19.3 TW
ISO 5167-2
ISO 6817
IEC 61158-2
PROFIBUS Guideline 8.012
Ethernet-APL Guideline
IEEE 802.3cg
IEC TS 60079-47
ODVA (DeviceNet · ControlNet)
IEC 61131-3
ISO 13849-1 · IEC 62061
EIA/ECA-310-E

Free while the open beta runs.

Open beta

Every account gets full access — all disciplines, every calculator, no project or seat limit. No credit card, no deadline.

Hydraulics and electrical — all 34 calculators, every one
Projects, Kanban and deadlines
Calculation report in Word (.docx), no watermark
2D and 3D diagrams on every result

Create a free account

Pricing will be published before the beta ends, and nothing is charged unless you subscribe first.

“I am an engineer. I got tired of checking a fieldbus segment in three vendor tools and a spreadsheet nobody dares to touch. I built LOGOS to give every check what those never gave it: provenance.”

— the team behind LOGOS