G
HYGR
ASGARD
®
RFF ⁄ RFTF
Quality product for HVAC sector, accuracy 3 % r. H.
The calibrateable room humidity and temperature sensor HYGRASGARD
®
RFF ⁄ RFTF measures the relative humidity and ⁄ or temperature
of air. It converts the measurands humidity and temperature into standard signals of 0 -10 V or 4...20 mA and is optional available with or
without display (for displaying actual humidity and actual temperature) in an elegant enclosure made of plastic, with snap-on lid, base with
4-hole attachment for installation on vertically or horizontally installed in-wall flush boxes, with predetermined breaking point for on-wall
cable entry, or in enclosures made of stainless steel (top and bottom part are of stainless steel, the lid is screwed on), vandalism-secure
version e.g. for schools, military barracks, and public buildings. Relative humidity (in % r.H.) is the quotient of water vapour partial pressure
divided by the saturation vapour pressure at the respective gas temperature. HYGRASGARD
®
RFF ⁄ RFTF are applied in non-aggressive
dust-free ambiences in refrigeration, air conditioning, ventilation and clean room tech nology, in interior rooms such as residential rooms,
offices, hotels, technical rooms, meeting rooms and convention centres. These measuring transducers are designed for exact detection
of air temperature and humidity. A digital long-term stable sensor is used as measuring element for humidity and temperature measure-
ment. Fine adjustment by the user is possible.
TECHNICAL DATA:
Power supply: .............................. 24 V AC (± 20 %) and 15 … 36 V DC (± 10 %) for U variant
15 … 36 V DC (± 10 %) for I variant (depending on working resistance)
Power consumption: .................. < 1.1 VA ⁄ 24 V DC ; < 2.2 VA ⁄ 24 V AC
Sensors: .......................................
digital humidity sensor with integrated temperature sensor,
dew-proof, small hysteresis, high long-term stability
HUMIDITY:
Measuring range, humidity: ...... 0 …100 % r. H.
(output corresponding to 0 -10 V or 4 … 20 mA)
Operating range, humidity: ....... 0 … 95 % r. H. (without formation of dew)
Deviation, humidity: ....................
± 3 % r. H.
(20…80 %) at +20 °C, otherwise ± 5 % r. H.
Output, humidity: ........................ 0 -10 V at U variant 4 … 20 mA at I variant,
working resistance < 800 Ω, see load resistance diagram
TEMPERATURE:
Measuring range, temperature: ... 0 … + 50 °C
(output corresponding to 0 -10 V or 4 … 20 mA or Ohm value)
others upon request!
Operating range, temperature: ... 0 …+ 50 °C
Deviation, temperature: ............ ± 0.8 K at 20 °C, under standard conditions
Output, temperature: ................ 0 -10 V or 4 … 20 mA or Ohm value
Ambient temperature: .............. storage - 25 …+ 50 °C, operation - 5 …+ 55 °C
Electrical connection: ................ 2-, 3- or 4-wire connection (see connecting diagram)
0.14 -1.5 mm ² via terminal screws on circuit board
Enclosure: .................................... plastic, material ABS,
colour pure white (similar RAL 9010),
stainless steel enclosure optional
Dimensions:
98 x 106 x 32 mm (Frija II)
100 x 100 x 25 mm (stainless steel)
Installation: .................................. wall mounting or on in-wall flush box, Ø 55 mm,
base with 4-hole for mounting on vertically or horizontally
installed in-wall flush boxes for cable entry from the back,
with predetermined breaking point for on-wall cable entry
from top ⁄ bottom in case of plain on-wall installation
Long-term stability: .................... ±1 % per year
Protection class: ........................ III (according to EN 60 730)
Protection type:.......................... IP 30 (according to EN 60 529)
Standards: ................................... CE conformity,
according to EMC directive 2004 ⁄ 108 ⁄ EC,
according to EN 61326-1: 2006,
according to EN 61326-2-3: 2006
Optional: ....................................... two-line display with illumination, 36 x15 mm (W x H),
for displaying ACTUAL temperature and ⁄ or ACTUAL humidity