Siemens QFA3160 - Specifications

Technical Instructions Q-Series Outdoor Air and Critical Environment
Document Number 155-755 Relative Humidity and Relative Humidity & Temperature Sensors
February 28, 2013
Page 6 Siemens Industry, Inc.
Specifications
Power Supply
Operating voltage 24 Vac
+ 20% or 13.5 to 35 Vdc
Frequency 50/60 Hz at 24 Vac
Power consumption
< 1 VA
Humidity element
Operating range 0 to 100% rh
Measurement range 0 to 95% rh
Accuracy at room temperature (73°F [20°C])
+ 2% rh, 0 to 95% rh
Time constant Approx. 20 s in moving air
Output signal, linear (terminal U1) 0 to 10 Vdc = 0 to 100% rh
Max.
+ 1 mA
Operating temperature -40°F to 158°F (-40°C to 70°C)
Temperature effect < 0.1% per degree Celsius
Sensing element Capacitive humidity sensing element
Output signal (rh only units) 4 to 20 mA or 0 to 10 Vdc, 0 to 100%
linear, proportional
Output signal (rh/T units) 4 to 20 mA or 0 to 10 Vdc, 0 to 100%
linear, proportional
Polarity protection Yes
Temperature element
(for combination rh/T
units only)
Operating temperature, jumper selectable 32°F to 122°F (0°C to 50°C) or
-31°F to 95°F (-35°C to 35°C),
-40°F to 158°F (-40°C to 70°C)
Time constant @ 32°F to 122°F Approximately 20 s in moving air
(0°C to 50°C) and 10 to 80% rh
Accuracy
@ 32°F to 122°F (0°C to 50°C)
+ 1.8°F (+ 1°C)
@ -31°F to 95°F (-35°C to 35°C)
+ 1.4°F (+ 0.8°C)
@ 32°F to 158°F (0°C to 70°C)
+ 1.8°F (+ 1°C)
Output signal 4 to 20 mA or 0 to 10 Vdc, 0 to 100%
linear, proportional
Calibration adjustments None
General
Installation 18 AWG cable length shared in
conduit with other sensor wiring.
750 ft (229 m) maximum
Connections Screw terminals
Dimensions
Outdoor air probe 6" OD × 3.3" L (15 mm × 84 mm)
Outdoor air housing 3.1" L × 2.3" W × 1.5" D
(80 mm × 60 mm × 40 mm)
Shield (mounted) 3.43" H × 3.5" W × 4.1" D
(87 mm × 89 mm × 104 mm)
Voltage requirement 13.5 to 35 Vdc
Material type Polycarbonate plastic
Protection class rating IP 65 (NEMA 4)
Agency certification
Conforms to EMC Directive 89/336/EEC
UL Listing UL873 XAPX
cUL Listing Canadian Standard C22.2 No. 24-93
Conforms to Australian EMC Radio Communication Act 1992
Framework Radio Interference Emission AS/NZS 3548
Standard