{
 "manufacturer": "Setra",
 "manufacturer_slug": "setra",
 "model": "SRH300D / SRH200D humidity and temperature transmitter (BACnet MS/TP)",
 "model_slug": "srh300d-srh200d-humidity-temperature-transmitter",
 "aliases": [
  "SRH300D",
  "SRH200D",
  "SRH300",
  "SRH200",
  "Setra SRH BACnet"
 ],
 "equipment_type": "Humidity / temperature sensor",
 "applies_to": "Setra SRH300 and SRH200 humidity/temperature transmitters with the RS-485 BACnet MS/TP output (SRH300D / SRH200D).",
 "summary": "The SRH300D and SRH200D are Setra humidity and temperature transmitters that act as BACnet MS/TP smart sensors. The SRH300D exposes eight read-only Analog Inputs (temperature, RH and calculated psychrometric values); the SRH200D exposes only temperature and RH. Units follow the configured measurement units.",
 "bacnet_transport": [
  "BACnet MS/TP"
 ],
 "firmware": "1.8 (PICS dated 28.10.2014)",
 "default_device_instance": null,
 "access_inferred": false,
 "notes": [
  "Points from sections 11 and 12.2 of the PICS; object names are the short symbols printed there (T, RH, e, Td, dv, r, h, Tf).",
  "The SRH200D has only AI 0 (T) and AI 1 (RH); AI 2-AI 7 exist on the SRH300D only.",
  "Present_Value is writable only while Out_Of_Service is true (it then defaults to 50.0).",
  "Absolute humidity in g/ft3 and mixing ratio in gr/lb use units codes that are not ASHRAE-defined.",
  "Device instance defaults to 1 on the SRH300D and 2 on the SRH200D."
 ],
 "source": {
  "title": "PICS SRH200D & SRH300D - BACnet Protocol Implementation Conformance Statement",
  "doc_number": null,
  "revision_date": "28.10.2014 (catalog copy dated 8/17/18)",
  "url": "https://www.bacnetinternational.net/catalog/manu/setra%20systems,%20inc./PICS_SRH200D_SRH300D%208_17_18.pdf"
 },
 "integration": {
  "summary": "Set the MS/TP communication parameters and a unique device instance, then read temperature and RH (and dew point on the SRH300D). The device can also broadcast unsolicited COV when a COV increment is set.",
  "minimum_points": [
   {
    "ref": "AI 0",
    "name": "T",
    "why": "Air temperature"
   },
   {
    "ref": "AI 1",
    "name": "RH",
    "why": "Relative humidity"
   },
   {
    "ref": "AI 3",
    "name": "Td",
    "why": "Dew point (SRH300D only)"
   }
  ],
  "enable": null,
  "heartbeat": null,
  "remote_sensors": null,
  "setup": [
   "Default comms are 38,400 baud, 8 data bits, no parity, 1 stop bit; change them with the writable Communication Parameter device property (e.g. \"76800-8n1\").",
   "Device instance defaults to 1 (SRH300D) or 2 (SRH200D) and is writable; Max_Master (default 127) is writable.",
   "Reinitialize Device and Device Communication Control need the password printed in the PICS."
  ],
  "gotchas": [
   "COV reporting is unsolicited broadcast (no subscriptions) and is off until COV_Increment is set below 1e9.",
   "Changing the measurement units changes the AI Units and Description properties."
  ]
 },
 "points": [
  {
   "type": "AI",
   "instance": 0,
   "name": "T",
   "description": "Temperature",
   "units": "°C / °F / K",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 1,
   "name": "RH",
   "description": "Relative humidity",
   "units": "%RH",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 2,
   "name": "e",
   "description": "Water vapor partial pressure (SRH300D only)",
   "units": "mbar / psi",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 3,
   "name": "Td",
   "description": "Dew point temperature (SRH300D only)",
   "units": "°C / °F / K",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 4,
   "name": "dv",
   "description": "Absolute humidity (SRH300D only)",
   "units": "g/m3 / g/ft3",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 5,
   "name": "r",
   "description": "Mixing ratio (SRH300D only)",
   "units": "g/kg / gr/lb",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 6,
   "name": "h",
   "description": "Enthalpy (SRH300D only)",
   "units": "kJ/kg / ft·lbf/lb / BTU/lb",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 7,
   "name": "Tf",
   "description": "Frost point temperature (SRH300D only)",
   "units": "°C / °F / K",
   "access": "R",
   "states": ""
  }
 ],
 "page": "https://easybacnet.com/bacnet-points-lists/setra/srh300d-srh200d-humidity-temperature-transmitter",
 "note": "Provided as-is. Point availability varies by firmware and options; verify against the live device.",
 "disclaimer": "DISCLAIMER: reference only, provided AS IS with no warranty. May contain errors or be out of date. You must verify every point against the manufacturer's current documentation and the live device before use. easybacnet.com accepts no liability for its use and is not affiliated with the manufacturer. Terms: https://easybacnet.com/terms#content"
}