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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)
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