General

Description

Device type

Humidity and Temperature Transmitter

Range of application

0...100%rh (non-condensing)

-10...60 °C with display

-40...85 °C without display

Mounting type

Wall, Cable (2m), Duct

Circuit type

2-wire: HF3A-2

3-/4-wire: HF3A-3 & HF3A-D  

Psychometric Calculation

•Dew point (DP)

•Frost point (FP)

•Wet bulb temperature (Tw)

•Enthalpy (H)

•Vapor concentration (Dv)

•Specific Moisture (Q)

•Mixing ratio (R)

•Vapor concentration at saturation (Dvs)

•Vapor partial pressure (E)

•Vapor saturation pressure (Ew)

•Volume mixing ratio

Digital Interface

Description

Interface

Via NFC and USB

RS485

Half duplex, baud rate adjustable (only digital version)

Software compatibility

HygroSoft Software

Protocol

Description

Modbus RTU

RS485 Interface (only digital version)

Power supply and connections

Description

Supply voltage

HF3A-2:  10...28 VDC

HF3A-3/D: 18...36 VDC

Current consumption

HF3A-2: 2x23 mA

HF3A-3/D: < 50mA

Polarity protection

Yes

Humidity Measurement

Description

Sensor

ROTRONIC Hygromer ® HT-1

Measurement Range

0...100%rh

Accuracy @23°C

± 1.2%rh

Repeatability

± 0.5%rh

Long Term Stability

<1 %rh / year

Sensor Response Time

Typically 10 sec, for 63 % of 35 to 80 %rh step change (1 m/s wind speed at sensor)

Temperature Measurement

Description

Temperature

Pt100 1/3 class B

Measurement Range

Wall1 -10...60 °C (with display), -40...85 °C (without display)

Duct2 / Cable: -50...100°C

Accuracy @23°C

± 0.1 °C

Repeatability

± 0.05 °C

Long Term Stability

<0.1 °C / year

Sensor Response Time

Typically 4 sec, for 63 %rH of a step change (1 m/s wind speed at sensor)

Analog Output

Description

Quantity

2

Assignment

Outputs can be freely assigned to each measured temperature value.

Default setting assignment

Output 1 = Humidity

Output 2 = Temperature

Standard Ranges

HF3A-2: 4...20 mA

HF3A-3 / HF3A-D: 0...20 / 4...20 mA   0...1 /0...5 / 0...10 V

Default setting Ranges

4...20 mA

Measuring signal

Freely scalable

Accuracy @ 23 °C

Current output: ± 20 µA

Voltage output: ± 1/5/10 mV

Measurement Interval

1 s

Short-circuit protection

Yes

Load compensation

HF3A-2: Automatically

HF3A-3 / HF3A-D: Configurable

Load resistance

max. current output: 0 to 500 Ω

min. voltage output: 1 kΩ/ per volt scaling

Resolution

15 bit

Self-heating

HF3A-2: max. 0.2 °C

HF3A-3/D: max. 0.1 °C

Alarms

Description

Assignment

Alarms can be assigned to any measured value

Alarm thresholds

High-Alarm, Upper Alarm threshold

Low-Alarm, Lowest Alarm threshold

Hysteresis

For Low-Alarm and High-Alarm

Alarm indication on display

All Alarms

Alarm trigger

Low- or High-Alarm

Housing Specifications

Description

Dimensions

Cable:   122 x 82 x 40.5 mm (Housing), 144 x 15 mm (Probe)

Wall:     122x172x40.5mm (Housing + Probe)

Duct:    122x82x265.5mm (Housing + Probe)

Weight

Wall:     204g

Duct:    226g

Cablle:  332g

Housing material

PC-ABS

IP protection

IP653

Cable Connections

1x M12, screw terminals (2 x M12 for HF3A-D)

Conformity with standards

Description

EMC directives

EMC-Directive 2014/30/EU:

EN 61000-6-1

EN 61000-6-2

EN 61000-6-3

EN 61000-6-4

EN 61326-1

Soldering material

Lead free (RoHS-Directive 2011/65/EU)

Fire protection class

Housing material UL94-HB

Cable gland UL94-V2

FDA/GAMP directives

GAMP5