Technical Data - S+S Regeltechnik HYGRASGARD RFF Series Operating Instructions, Mounting & Installation

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®
HYGRASGARD
The calibratable room humidity and temperature sensor HYGRASGARD
converts the measurands humidity and temperature into standard signals of 0 -10 V or 4...20 mA and is available with or without an optional display
(for displaying actual humidity and actual temperature) in an elegant housing 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. The relative humidity
(in % r.H.) is the quotient of water vapour partial pressure divided by the saturation vapour pressure at the respective gas temperature.
It is used in non-aggressive dust-free atmospheres in refrigeration, air conditioning, ventilation and clean room technology, 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 a measuring element for humidity and temperature measurement.
Fine adjustment by the user is possible.

TECHNICAL DATA

Power supply:
Working resistance:
Load resistance:
Power consumption:
Sensors:
HUMIDIT Y
Measuring range, humidity:
Operating range, humidity:
Deviation, humidity:
Output, humidity:
TEMPERATURE
Measuring range, temperature:
Operating range, temperature:
Deviation, temperature:
Output, temperature:
Ambient temperature:
Electrical connection:
Housing:
Housing dimensions:
Installation:
Long-term stability:
Protection class:
Protection type:
Standards:
Optional:
RFF ⁄ RFTF
24 V AC (± 20 %) and 15...36 V DC for U variant
15...36 V DC for I variant,
depending on working resistance, residual ripple stabilised ± 0.3 V
R (ohm) = (U -14 V) ⁄ 0.02 A for I variant
a b
R > 5 kOhm for U variant
L
< 1.1 VA ⁄ 24 V DC ;
< 2.2 VA ⁄ 24 V AC
digital humidity sensor
with integrated temperature sensor,
small hysteresis, high long-term stability
0...100 % r. H.
(output corresponding to 0 -10 V or 4 ... 20 mA)
0 ... 95 % r. H. (non-precipitating air)
typically ± 2.0 % (20...80 % r. H.) at +25 °C, otherwise ± 3.0 %
0 -10 V for U variant
4...20 mA for I variant, working resistance < 800 Ω,
see load resistance diagram
0...+ 50 °C
(output corresponding to 0 -10 V or 4... 20 mA or Ohm value)
others upon request!
0...+ 50 °C
typically ± 0.2 K at +25 °C
0 -10 V or 4 ... 20 mA or Ohm value
storage –25...+50 °C,
operation –5...+55 °C
2-, 3- or 4-wire connection (see connecting diagram)
0.14 -1.5 mm ² via terminal screws
plastic, material ABS,
colour pure white (similar to RAL 9010)
85 x 85 x 27 mm (Baldur 1)
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
±1 % per year
III (according to EN 60 730)
IP 30 (according to EN 60 529)
CE conformity, according to EMC directive 2014 ⁄ 30 ⁄ EU,
according to EN 61326-1, according to EN 61326-2-3
two-line display with illumination, 36 x15 mm (W x H),
for displaying ACTUAL temperature and ⁄ or ACTUAL humidity
® RFF ⁄ RFTF measures the relative humidity and ⁄ or temperature of air. It
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Rev. 2020 - V23