Datasheet

10
Quality product for HVAC sector, accuracy ± 2 % and ± 3 %
Calibratable outdoor humidity ⁄ temperature sensor HYGRASGARD
®
AFF ⁄ AFTF (± 3 % ) AFF - SD ⁄ AFTF - SD (± 3 % ) and
AFF - 20 ⁄ AF TF - 20 (± 2 %) with plastic sinter filter (optional metal sinter filter) or
AFF - 25 ⁄ AFTF - 25 (± 2 %) 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) 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: ± 3 % r. H. (20...80 %) at +20 °C, otherwise ± 5 % r. H.
AFF - 20 ⁄ AFTF - 20, AFF - 25 ⁄ AF TF - 25: ± 2 % r. H. (20...90 %) at +20 °C, otherwise ± 3 % r. H.
Output, humidity: 0 -10 V for U variant
4...20 mA for I variant, see load resistance diagram
TEMPERATURE
Measuring range, temperature: multi-range switching (see table)
–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-precipitating
Deviation, temperature: ± 0.2 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 on circuit board
Enclosure: plastic, 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, Ø 16 mm
AFF ⁄ AFTF, AFF - 20 ⁄ AFTF - 20, AFF - SD ⁄ AFTF - SD: NL = 55 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 ⁄ AF TF - 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)
G
HYGRASGARD
®
AFF - xx ⁄ AFTF - xx Rev. 2017 - V23 GB
SD = Rev. 2017 - V21 GB