Keithley 2400 source-measure unit — device market

Install

Three ways to run this device. Each one serves its fake backend: no instrument, no simulator install and no upstream checkout.

OpenAI4S (one command)

shell

openai4s lab add labs/baroobob__keithley2400

Installs the device into the OpenAI4S Lab on its fake backend and starts it. First time? See setup below.

Or, in the workbench, open the Lab tab → Market → Install.

Standalone MHS endpoint

shell

git clone --depth 1 https://github.com/PKU-YuanGroup/OpenMHS.git && cd OpenMHS
PYTHONPATH=MHS/sdk/src python3 -m mhs serve labs/baroobob__keithley2400 --port 7400
# in a second terminal, from the same directory:
PYTHONPATH=MHS/sdk/src python3 -m mhs describe --endpoint http://127.0.0.1:7400

Serves the device as an MHS endpoint on port 7400 from an OpenMHS clone (Python 3.10 or later, standard library only); describe prints what it offers.

Any MCP host (Claude Desktop, Cursor, …)

mcp configuration

{
  "mcpServers": {
    "keithley2400": {
      "command": "python3",
      "args": [
        "-m",
        "mhs",
        "serve",
        "labs/baroobob__keithley2400",
        "--mcp"
      ],
      "env": {
        "PYTHONPATH": "/path/to/OpenMHS/MHS/sdk/src"
      }
    }
  }
}

Add this server to the host's MCP configuration and replace /path/to/OpenMHS with the path of your OpenMHS clone. The host starts the server and talks to it on stdin and stdout.

What it does

Measures

trigger_delay

Adjusts

voltage
output

Actions

measure_current: Configure current measurement (CONF:CURR, FORM:ELEM CURR) in source-voltage mode and read one sample with the trigger settings of the clone; the source voltage is not changed
measure_voltage: Configure voltage measurement (CONF:VOLT, FORM:ELEM VOLT) with the source current set to zero and read one sample with the trigger settings of the clone
measure_resistance: Configure resistance measurement (CONF:RES, FORM:ELEM RES) and read one sample with the trigger settings of the clone; the source setting is not changed
safe_state: Disable the source output and set the source voltage and source current to zero

Names as the driver declares them. Units, limits and the safety declaration are in the package's REFERENCE.md.

First-time setup

The OpenAI4S workbench with the OpenMHS lab, from a source checkout:

shell

# OpenAI4S workbench with the OpenMHS lab (source checkout)
git clone --recursive https://github.com/PKU-YuanGroup/OpenAI4S.git
cd OpenAI4S && ./setup.sh && source .venv/bin/activate
openai4s lab add labs/baroobob__keithley2400
openai4s serve        # open the Lab tab

The standalone endpoint and the MCP server need only an OpenMHS clone and Python 3.10 or later. More in the market's getting-started guide and on the OpenAI4S host page.

Source and evidence

Upstream: baroobob/keithley2400
Pinned commit: 6491ff740bbd
Licence: GPL-3.0
Stars: 5
Evidence: contract_checked on the fake backend
Backends: fake

The driver package MHS/drivers/labs/baroobob__keithley2400 wraps the upstream code at the pinned commit. Its REFERENCE.md documents the full contract: every value, action, unit, limit and the safety declaration.