10
G
HYGRASGARD
®
KFF ⁄ KFTF ⁄ KFF - SD ⁄ KFTF - SD (± 2,0 %), KFF - 20 ⁄ KFTF - 20 (± 1,8 %)
Rev. 2020 - V26
Calibratable duct humidity-
⁄
temperature sensor
HYGRASGARD
®
KFF - SD ⁄ KFTF - SD
(± 2.0%), with plastic sinter filter (optional metal sinter filter),
housing made from impact-resistant plastic with snap-on lid.
Calibratable duct humidity
⁄
temperature sensor
HYGRASGARD
®
KFF ⁄ KFTF
(± 2.0%) or
KFF - 20 ⁄ KFTF - 20
(± 1.8%), with plastic sinter filter
(optional metal sinter filter), housing made from impact-resistant plastic with quick-locking screws
with ⁄ without optional display
.
It measures the relative humidity and ⁄ or the temperature of the air and converts the measurands into a standard signal of 0 - 10 V or 4...20 mA. It
has four switchable temperature ranges and is applied in non-aggressive dust-free atmospheres in refrigeration, air conditioning, ventilation and
clean room technology. These measuring transducers are designed for exact detection of humidity. A digital long-term stable sensor is used as
measuring element for humidity measurement. The sensor is factory-calibrated; an environmental precision adjustment by an expert 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:
plastic
sinter filter, Ø 16 mm, L = 35 mm, exchangeable
(optional
metal
sinter filter, Ø 16 mm, L = 32 mm)
HUMIDITY
Measuring range, humidity:
0...100 % r. H. (output corresponding to 0 -10 V or 4...20 mA)
Permissible air humidity:
< 95 % r. H., non-precipitating air
Deviation, humidity:
KFF ⁄ KFTF ⁄ KFF - SD ⁄ KFTF - SD:
typically
± 2.0 %
(20...80 % r. H.) at +25 °C, otherwise ± 3.0 %
KFF - 20 ⁄ KFTF - 20:
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 with 4 switchable measuring ranges
(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:
storage –35...+85 °C; operation – 30...+75 °C, non-precipitating
Deviation, temperature:
typically ± 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
Housing:
plastic, UV-stabilised, material polyamide, 30 % glass-globe reinforced,
with quick-locking screws (slotted ⁄ Phillips head combination),
colour traffic white (similar to RAL 9016),
,
housing cover for display is transparent!
Housing dimensions:
KFF - xx ⁄ KFTF - xx
(without display):
72 x 64 x 37.8 mm (Tyr 1/01)
KFF ⁄ KFTF
(with display):
72 x 64 x 43.3 mm (Tyr 1)
KFF - 20 ⁄ KFTF - 20
(with display):
26 x 90 x 50 mm (Tyr 2)
Cable connection:
cable gland
, plastic (M 16 x 1.5; with strain relief,
exchangeable, max. inner diameter 10.4 mm)
or
M12 connector
according to DIN EN 61076-2-101 (on request)
Protective tube:
PLEUROFORM
TM
, material polyamide (PA6), with torsion protection
Ø 20 mm, NL = 235 mm, v
max
= 30 m/s (air)
(on request, optional
stainless steel V2A
(1.4301)
,
Ø 16 mm)
Process connection:
by mounting flange, plastic (included in the scope of delivery)
Long-term stability:
± 1 % per year
Protection class:
III (according to EN 60 730)
Protection type:
KFF - SD ⁄ KFTF - SD
IP 54
(according to EN 60 529) Housing tested, TÜV SÜD, Report No. 713160960A (Tyr 01)
KFF - xx ⁄ KFTF - xx
IP 65
(according to EN 60 529) Housing tested,
TÜV SÜD, Report No. 713139052
(Tyr 1)
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
KFF ⁄ KFTF
(Tyr 1)
:
two-line, cutout approx. 36 x15 mm (W x H)
KFF - 20 ⁄ KFTF - 20
(Tyr 2)
:
three-line, cutout approx. 70 x 40 mm (W x H)
