Re: Thermo Fischer FHT 6020 Radiation Monitor

["Chandler, Brendan via Tech-talk" <tech-talk at aps.anl.gov>]

Hi Kieth,

Here is the link to the github repository:

https://github.com/brendanchandler/radmon-fht6020

The most interesting files are probably these:

streamdevice protocol file: https://github.com/brendanchandler/radmon-fht6020/blob/main/protocol/FHT6020.proto

database file: https://github.com/brendanchandler/radmon-fht6020/blob/main/radmonApp/db/fht6020.template

medm screens: https://github.com/brendanchandler/radmon-fht6020/tree/main/radmonApp/op/adl

Also, for the rest of the list, I had replied to Kieth last Friday but accidentally only replied to him.  Below is my original message from last Friday.

Hello Kieth,

We use these monitors at APS, and I have a streamdevice based IOC that I will post to github later today (US time).  I'll follow up with a link once available.

Note that our EPICs support is limited to readbacks only, as we considered it a safety issue to change the device configuration remotely.

Our screens are MEDM based, but probably could be converted to CSS without much difficulty.

We have our radiation monitors hooked up via the RS232 port to a moxa, which acts as a bridge to the network and EPICs.

Implementing EPICs communication support went relatively smoothly.  Outside of epics, we had some issues with vibrations affecting the readings, so you might consider testing with vibrations similar to your deployment environment.

I'll send the code link later.

Brendan Chandler

Thanks,

Brendan Chandler

---

From: Tech-talk <tech-talk-bounces at aps.anl.gov> on behalf of Baker, Keith (DLSLtd, RAL, LSCI) via Tech-talk <tech-talk at aps.anl.gov>
Sent: Friday, March 14, 2025 06:14
To: tech-talk at aps.anl.gov <tech-talk at aps.anl.gov>
Subject: Thermo Fischer FHT 6020 Radiation Monitor

 

Hello,

I have posted a few questions here in recent years asking about Radiation Monitors and had lots of helpful replies.

 

We are finally about to borrow a Thermo Fischer FHT 6020 for evaluation, so I would like to get an example EPICS IOC running.

I believe these monitors are in use or have been tested at ISIS, SLAC and Australia, perhaps elsewhere, so I was wondering who had the most up to date or complete driver they could share with me, please?

I found an asyn driver in SLACs EPICS repository and edl files. Is this my best choice to start with?

 

Does anybody use StreamDevice? (Brendan Chandler at APS mentioned this a few years ago.)

Has anybody created CSS opi files? (I could try running an eld->opi converter as a starting point.)

 

The monitor only seems to have an RS232 port, so I was wondering how different sites connect with this? Perhaps a local IOC with serial port, an RS232->RS485 adapter for more remote connections, or a local terminal server?

We don’t need to daisy chain the monitors. We’ll have dedicated wiring and IOC for each.

 

Any recommendations appreciated.

Thanks.

Keith Baker

Diamond Light Source

 

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