Calculated Humidity Objects - Vaisala CARBOCAP GMW90 Series User Manual

User's Guide _______________________________________________________________________

Calculated Humidity Objects

Table 32 Calculated Humidity Objects
Instance Name
4 "Td"
5 "Tdf"
6 "dTd"
7 "Tw"
8 "a"
9 "x"
10 "h"
Table 33 Calculated Humidity Object Properties
Property Data type
(Application Type)
Object_Identifier BACnetObjectIdentifier
Object_Name CharacterString
Object_Type BACnetObjectType
(ENUMERATED)
Present_Value Real
Description CharacterString
Units BACnetEngineeringUnits
(ENUMERATED)
Status_Flags BACnet Status Flags (BIT
STRING)
Reliability BACnet Reliability
(ENUMERATED)
Event State BACnetEventState
(ENUMERATED)
Out_of_Service BOOLEAN
COV_Increment Real
Table 34 Status Flags
Flag
IN_ALARM
FAULT
OVERRIDDEN
OUT_OF_SERVICE
92 ___________________________________________________________________ M211659EN-C
Description
"Dewpoint"
"Dewpoint"
"Dewpoint depression"
"Wet bulb temperature"
"Absolute humidity"
"Mixing ratio"
"Enthalpy"
State Cause
FALSE Event State equals 0 (NORMAL)
TRUE Event State not 0
FALSE Reliability equals 0 (NO FAULT DETECTED)
TRUE Reliability not 0
FALSE Always FALSE
FALSE Present Value may NOT be written via BACnet
TRUE Present Value may be written via BACnet
Unit
62/64 (ºC/ ºF)
62/64 (ºC/ ºF)
121/120 (ΔºK/ ΔºF)
62/64 (ºC/ ºF)
217/2000 grams-per-cubic-meter / grains-per-cubic-foot
(Vaisala defined unit)
28/2001 grams-of-water-per-kilogram-dry-air / grains-of-
water-per-pound (Vaisala defined unit)
149/24 kilojoules-per-kilogram-dry-air / btus-per-pound-of-
dry-air
Writable Value or Initial Value
(Conformance
Code)
No (R) 00 00 00 xx (hex)
Object Type = 0,
Instance = x
See Table 32 above.
No (R) See Table 32 above.
No (R) 0 (Analog Input)
Yes 0.0
(When Oos) (R)
No (O) See table above
No (R) See table above
Yes (when OoS) 0 (FAULT == FALSE)
(R)
Yes (when OoS) 0 (NO FAULT DETECTED) Volatile
(O)
No (R) 0 (NORMAL)
Yes (R) 0 (FALSE)
Yes (O) NaN (COV reporting
disabled)
Persistence
Nonvolatile
Nonvolatile
Fixed
Volatile
Nonvolatile
Nonvolatile
Volatile
Volatile
Volatile
Nonvolatile