| Instance | Name | Description | Unit |
|---|---|---|---|
| 3 | "Td" | "Dewpoint" | 62/64 (ºC / ºF) |
| 4 | "Tdf" | "Dew/Frostpoint" | 62/64 (ºC / ºF) |
| 5 | "Tw" | "Wet bulb temperature" | 62/64 (ºC / ºF) |
| 6 | "a" | "Absolute humidity" | 217/2000 grams-per-cubic-meter / grains-per-cubic-foot - Vaisala defined unit |
| 7 | "x" | Mixing ratio | 28/2001 grams-of-water-per-kilogram-dry-air / grains-of-water-per-pound - Vaisala defined unit |
| 8 | "h" | Enthalpy | 149/24 kilojoules-per-kilogram-dry-air / btus-per-pound-dry-air |
| Property | Data Type (Application Datatype) | Writable (Conformance Code) | Value or Initial Value | Persistence |
|---|---|---|---|---|
| Object_Identifier | BACnetObjectIdentifier | No (R) |
00 00 00 xx (hex) Object Type = 0, Instance = x (see Table 1) |
Fixed |
| Object_Name | CharacterString | No (R) | See Table 1 | Fixed |
| Object_Type | BACnetObjectType (ENUMERATED) | No (R) | 0 (Analog Input) | Fixed |
| Present_Value | Real | Yes (When Oos) (R) | 0.0 | Volatile |
| Description | CharacterString | No (O) | See Table 1 | Fixed |
| Units | BACnetEngineeringUnits (ENUMERATED) | Yes (R) | See Table 1 | Nonvolatile |
| Status_Flags | BACnet Status Flags (BIT STRING) | No (R) | 0 (FAULT == FALSE) | Volatile |
| Reliability | BACnet Reliability (ENUMERATED) | Yes (when OoS) (O) | 0 (NO FAULT DETECTED) | Volatile |
| Event State | BACnetEventState (ENUMERATED) | No (R) | 0 (NORMAL) | Volatile |
| Out_of_Service | BOOLEAN | Yes (R) | 0 (FALSE) | Volatile |
| COV_Increment | Real | Yes (O) | NaN (COV reporting disabled) | Nonvolatile |
| Flag | State | Cause |
|---|---|---|
| IN_ALARM | FALSE | Event State equals 0 (NORMAL) |
| TRUE | Event State not 0 | |
| FAULT | FALSE | Reliability equals 0 (NO FAULT DETECTED) |
| TRUE | Reliability not 0 | |
| OVERRIDDEN | FALSE | Always FALSE |
| OUT_OF_SERVICE | FALSE | Present Value may NOT be written via BACnet |
| TRUE | Present Value may be written via BACnet |
| STATE | CAUSE |
|---|---|
| 0 NO_FAULT_DETECTED | |
| 1 NO_SENSOR | Sensor failure detected. |
| 2 OVER_RANGE | Not checked |
| 3 UNDER_RANGE | Not checked |
| 7 UNRELIABLE_OTHER | Other measurement error |
| STATE | CAUSE |
|---|---|
| 0 NORMAL | Reliability equals 0 (NO FAULT DETECTED) |
| 1 FAULT | Reliability not 0 |
Out of Service
Out of Service value is writable. By Default = FALSE.