Twin analog transmitters for capacitive ALMEMO® humidity sensors
MA8646 Wall-housing
transmitter
● Twin analog transmitters
for capacitive ALMEMO® humidity sensors ●
Humidity sensors can be connected, exchanged as and when necessary.
● Analog output
range can be scaled on the sensor connector.
● For stationary
measuring operations, housing suitable for wall-mounting
● Versions available
for different supply voltages
Options :
OA8646R3
Analog output, 2 x 0 to 20 mA
Other analog output range,
PLEASE SPECIFY WHEN ORDERING !
OA9000PR
Programming on the
humidity sensor connector
OA8646U0
Voltage supply : 13 to 28 V DC
not electrically isolated
OA8646U
Voltage supply : 10 to 30 V DC
electrically isolated
OA8646U5
Voltage supply : 110 V AC, 50-60 Hz
Humidity sensors :
FHA6466C
Mountable sensor, -20 to +60 °C
FHA6461
Plastic tube,
with 1.5-meter cable, -20 to +60 °C
FHA6461C
Stainless steel tube,
with 1.5-meter cable, -20 to +80 °C
FHA646R
Miniature sensor,
with 2-meter cable, -30 to +100 °C
FHA6467
up to 16 bar,
with 1.5-meter cable, -20 to +60 °C
Technical data
:
Operative range :
see humidity sensor
Humidity measuring circuit
Measuring range :
0 to 100 % r.H. (%rH, HrH, HcrH)
Sensor :
Accuracy :
Reproducibility :
Nominal temperature :
capacitive
± 2 % r.H. at nominal temperature
1 % at nominal temperature
+23 ± 3°C
Transmitter, accuracy :
± 0.5 % r.H.
Temperature measuring circuit
Measuring range :
-50 to +125 °C
Sensor :
Accuracy :
Reproducibility :
NTC type N
0 to +70 °C : ± 0.1 K
-20 to 0 °C : ± 0.4 K
+70 to +100 °C : ± 0.6 K
0.1 K
Transmitter, accuracy :
± 0.1 K
Outputs :
2 x 0 to 10 V (load : >100 kohm)
Resolution :
12 bit (4000 digits)
Temperature drift :
± 0.02 % / K
Nominal temperature :
+23 ± 3°C
Option R3 :
2 x 0/4 to 20 mA
(burden : <500 ohm)</font>
Output range :
Standard 0 to 100 % r.H., -30 to
+70 °C Settable to customerspecific
needs either before leaving
the factory or programmed on the
sensor connector by the user using ALMEMO® device
Power supply :
Option U :
Option U0 :
Mains 230 V +10%/-15%, 50 to 60Hz
(Option U5 : 110 V)
10 to 30 V DC, electrically isolated
13 to 28 V DC, not electr. isolated
Current consumption :
approx. 30 mA (no load)
Connections:
screw terminals
Cable bushing :
on the wall side or through
grommets (PG) on end of device
Housing :
Wall-housing, plastic
123 x 68 x 49 mm,
protection system IP 40
Environmental conditions :
Operating temperature
-10 to +60 °C
Storage temperature :
-30 to +70 °C
Ambient relative humidity :
10 to 90 % rH (non-condensing)
Types :
MA86460
Humidity / temperature transmitter in
wall-mounted housing,
Outputs : 2 x 0 to 10 V (equivalent to 0 to 100 % r.H. and -30 to
+70 °C)
Supply voltage 230 V AC, including wall unit, without sensor
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