Technical Data - S+S Regeltechnik HYDRASGARD VFF-I Notice D'instruction

G
®
HYGRASGARD
The calibratable humidity and temperature sensor HYGRASGARD
It converts the measurands humidity and temperature into a standard signal of 0 - 10 V or 4...20 mA, and is available with ⁄ without an optional
display. It is equipped with four switchable temperature ranges. Relative humidity (in % r.H.) is the quotient of water vapour partial pressure
divided by the saturation vapour pressure at the respective gas temperature. The measuring transducers are designed for exact detection of
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.
The showcase sensor is used in non-aggressive, dust-free environments and is specifically designed for installation in ceilings, walls,
inside showcases or display cabinets in museums, galleries, cinemas or lecture halls or laboratories. The measuring element is contained inside
a stainless steel probe and its low height (approx. 2.5 mm) makes it barely noticeable.

TECHNICAL DATA

Power supply:
Working resistance:
Load resistance:
Power consumption:
Sensors:
HUMIDIT Y
Measuring range, humidity:
Operating range, humidity:
Deviation in humidity:
Output, humidity:
TEMPERATURE
Measuring range,
Deviation, temperature:
Output, temperature:
Ambient temperature:
Long-term stability:
Enclosure:
Enclosure dimensions:
Cable gland:
Electrical connection:
Connecting cable:
Sensor protection:
Mounting (sensor):
Protection class:
Protection type:
Standards:
Optional:
VFF ⁄ VFTF
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,
low hysteresis, high long-term stability
0...100 % r.H. (output corresponding to 0 - 10 V or 4...20 mA)
0..95 % r. H. (without formation of dew)
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, see load resistance diagram
multi-range switching with temperature:
4 switchable measuring ranges (see table)
–35...+35 °C; –35...+75 °C; 0...+50 °C; 0...+80 °C
(output corresponding to 0 - 10 V or 4...20 mA)
± 0.2 K at +25 °C
0 - 10 V or 4...20 mA
storage –5...+60 °C; operation –5...+60 °C
± 1 % per year
plastic, UV-stabilised, material polyamide, 30 % glass-globe reinforced,
with quick-locking screws (slotted ⁄ Phillips head combination),
colour traffic white (similar to RAL 9016), enclosure cover for display is transparent!
72 x 64 x 37.8 mm (Tyr 1 without display)
72 x 64 x 43.3 mm (Tyr 1 with display)
M 16 x 1.5 ; including strain relief, exchangeable,
max. inner diameter 10.4 mm
2-, 3-, or 4-wire connection (see connecting diagram),
0.14 - 1.5 mm², via terminal screws on circuit board
PVC, LiY Y, 4 x 0.14 mm², cable length (K L) = 2 m (other lengths optional)
probe made of stainless steel, V4A (1.4571), pluggable;
sensor head Ø = 17 mm, H = approx. 2.5 mm;
protective sleeve Ø = 10 mm, NL = approx. 25 mm, M10 x 1.0;
with plastic plug connector Ø = approx. 11 mm, NL = approx. 25 mm,
cut-out Ø = 11 - 15 mm, inserted length (EL) = approx. 50 mm,
lock nut for fixing is included in the scope of delivery.
III (according to EN 60 730)
IP 65 (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, cut-out approx. 36 x 15 mm (W x H),
for displaying ACTUAL temperature and ⁄ or ACTUAL humidity
® VFF ⁄ VFTF measures the relative humidity and temperature of air.
Rev. 2018 - V20 GB