10
G
HYGRASGARD
®
AFF - xx ⁄ AFTF - xx
Rev. 2019 - V25
SD =
Rev. 2019 - V23
Calibratable outdoor humidity
⁄
temperature sensor
HYGRASGARD
®
AFF ⁄ AFTF
(± 2.0 %
AFF - SD ⁄ AFTF - SD
(± 2,0 % ) and
AFF - 20 ⁄ AFTF - 20
(± 1.8 %) with
plastic sinter filter (optional metal sinter filter) or
AFF - 25 ⁄ AFTF - 25
(± 1.8 %)
with pluggable metal sinter filter;
terminal-box enclosure made of impact-resistant plastic,
with ⁄ without optional display
.
It measures the relative humidity and ⁄ or temperature of the air and converts the measurand into a standard signal of 0 - 10 V or 4...20 mA.
They have four switchable temperature ranges and are applied in non-aggressive, dust-free atmospheres in refrigeration, air conditioning, ventilation
and clean room technology. Relative humidity (in % r. H.) is the quotient of water vapour partial pressure divided by the saturation vapour pressure
at the respective gas temperature. These measuring transducers are designed for exact detection of humidity. A digital long-term stable sensor is
used as measuring element for humidity measurement. Fine adjustment by the user is possible.
TECHNICAL DATA
Power supply:
24 V AC (± 20 %); 15...36 V DC for U variant
15...36 V DC for I variant, depending on working resistance, residual ripple stabilised ± 0.3 V
Working resistance:
R
a
(ohm) = (U
b
-14 V) ⁄ 0.02 A for I variant
Load resistance:
R
L
> 5 kOhm for U variant
Power consumption:
< 1.1 VA ⁄ 24 V DC ; < 2.2 VA ⁄ 24 V AC
Sensors:
digital humidity sensor with integrated temperature sensor,
low hysteresis, high long-term stability
Sensor protection:
AFF ⁄ AFTF, AFF - 20 ⁄ AFTF - 20, AFF - SD ⁄ AFTF - SD:
plastic
sinter filter, Ø 16 mm, L = 35 mm, exchangeable
(optional metal
sinter filter, Ø 16 mm, L = 32 mm)
AFF - 25 ⁄ AFTF - 25:
pluggable measuring head
(probe), stainless steel
V2A
(1.4301),
with metal
sinter filter, Ø 16 mm, L = 88.5 mm, exchangeable
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 dew formation)
Permissible air humidity:
< 95 % r. H., non-precipitating air
Deviation, humidity:
AFF ⁄ AFTF, AFF - SD ⁄ AFTF - SD:
typically
± 2.0 %
(20...80 % r. H.) at +25 °C, otherwise ± 3.0 %
AFF - 20 ⁄ AFTF - 20, AFF - 25 ⁄ AFTF - 25:
typically
± 1.8 %
(10...90 % r. H.) at +25 °C, otherwise ± 2.0 %
Output, humidity:
0 -10 V for U variant
4...20 mA for I variant, see load resistance diagram
TEMPERATURE
Measuring range,
multi-range switching
(see table)
temperature:
–35...+35 °C; –35...+75 °C; 0...+50 °C; 0...+80 °C
(output corresponding to 0 -10 V or 4...20 mA)
Ambient temperature:
AFF ⁄ AFTF, AFF - 20 ⁄ AFTF - 20, AFF - 25 ⁄ AFTF - 25:
storage –35...+85 °C; operation – 30...+80 °C, non-precipitating
AFF - SD ⁄ AFTF - SD:
storage –35...+85 °C; operation – 30...+70 °C, non-precipitatin
Deviation, temperature:
AFF ⁄ AFTF:
typically ± 0.4 K at +25 °C
AFF - 20 ⁄ AFTF - 20, AFF - 25 ⁄ AFTF - 25:
typically ± 0.2 K at +25 °C
AFF - SD ⁄ AFTF - SD:
typically ± 0.6 K at +25 °C
Output, temperature:
0 -10 V or 4...20 mA or Ohm value
Electrical connection:
2-, 3-, or 4-wire connection (see connecting diagram), 0.14 - 1.5 mm², via terminal screws
Enclosure:
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!
Enclosure dimensions:
AFF ⁄ AFTF, AFF - 20 ⁄ AFTF - 20, AFF - 25 ⁄ AFTF - 25:
126 x 90 x 50 mm (Tyr 2)
AFF - SD ⁄ AFTF - SD:
72 x 64 x 37,8 mm (Tyr 1
without
Display)
72 x 64 x 43,3 mm (Tyr 1
with
display)
Cable gland:
M 16 x 1.5, including strain relief, exchangeable, max. inner diameter 10.4 mm
Protective tube:
stainless steel V2A
(1.4301)
,
Ø 16 mm
AFF ⁄ AFTF, AFF - SD ⁄ AFTF - SD:
NL = 55 mm
AFF - 20 ⁄ AFTF - 20:
NL = 137 mm
AFF - 25 ⁄ AFTF - 25:
NL = 88.5 mm
Process connection:
by screws
Long-term stability:
± 1 % per year
Protection class:
III (according to EN 60 730)
Protection type:
IP 65 (according to EN 60 529) enclosure only!
Standards:
CE conformity, according to EMC directive 2014 ⁄ 30 ⁄ EU, according to EN 61326-1, according to EN 61326-2-3
Optional:
display with illumination
, for displaying ACTUAL temperature and ⁄ or ACTUAL humidity
AFF ⁄ AFTF, AFF - 20 ⁄ AFTF - 20, AFF - 25 ⁄ AFTF - 25
(Tyr 2)
: three-line
,
cutout 70 x 40 mm (W x H),
AFF -SD ⁄ AFTF - SD
(Tyr 1)
: two-line
, cutout approx. 36 x15 mm (W x H)
