General

Description

Device type

Transmitter for different probes

Measurement parameters, depending on transmitter version and probe model

•Humidity

•Temperature

•Differential pressure

•CO2

Range of application

-40...70 °C / 0...100 %rh, non-condensing

-10...60 °C / 0...100 %rh, non-condensing with display

Mounting type

Wall mount only (Duct mount achievable together with industrial cable probe)

Circuit type

2-wire: HF5A-21

3-/ 4-wire: HF5A-31 & HF5A-D1 with the recommendation:

4-wire galvanic separated with unmounted Jumper J1 - with the benefit that the power supply and the outputs are separated galvanic isolated. Per default, the Jumper J1 is mounted.

General Specification

Description

Optional Display

LCD

Resolution of the Display

128 * 64 pixel

First time start up time

2-wire: < 30 s (Blinking Led or Display turn on after 10 sec.)

3-/ 4-wire: < 3 s

Measuring interval

2-wire: 4...10 sec. (Depending on current consumption of connected probe), HCD 1 sec.

3-/ 4-wire: 1 s

Simulation

Fixed values can be set for system validation

Storage and transport conditions

-40...85 °C / 0...100 %rh, non-condensing

Operating altitude

Max 2000 meter above sea level

Electrical connections

HF5A-2: 4-pole screw-terminal

HF5A-3 & HF5A-D: 6-pole screw-terminal

HF5A-D: Additional 3-pol screw-terminal (for the RS485 connectors)

Psychrometric Calculation

•Dew point (DP) above and below freezing point

•Frost point (FP) above and below freezing point and dew point above freezing point

•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

NFC Interface

Via NFC Interface

RS485

Half duplex, baud rate adjustable (only digital version)

Software compatibility

HygroSoft Software

Protocol

Description

Rotronic-ASCII-Protocol

Sensor communication

Modbus RTU

Sensor communication (RMS-Probes), RS485 Interface (only digital version)

Power supply and connections

Description

Supply voltage

Galvanically separated: 18...36 VDC

Current consumption

2-wire:  50 mA / 24 VDC

3-/4-wire: < 100mA / 24 VDC

Polarity protection

Yes

Humidity and Temperature

Description

HC2 and HC2A

Compatible with all versions

HCD

Compatible with all versions

Temperature Measurement

Description

TCD

Compatible with all versions

Differential pressure Measurement

Description

PCD (RMS Probe)

Only with 3-/4 -wire HF5A-31 & HF5A-D1

CO2 Measurement

Description

CCD (RMS Probe)

Only with 3-/4 -wire HF5A-31 & HF5A-D1

Analog Output

Description

Quantity

2

Assignment

Outputs can be assigned to each measured value

Default setting assignment

Humidity and temperature

Standard Ranges

•4...20 mA

3-/4-wire HFA-31 & HF5A-D1:

•0...20 mA

•0...5 V

•0...10 V

Default setting Ranges

4...20 mA

Measuring signal

Freely scalable

Accuracy @ 23 °C

Current output: ± 20 µA

Voltage output: ± 1 mV

Measurement Interval

1 s

Short-circuit protection

Yes

Max Load

500 Ω

Load compensation

Automatically

Min. Load resistance

Current output: 0 to 500 Ω

Voltage output: 1 kΩ

Resolution

Greater than 15 bit

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

Log- or High-Alarm

Housing Specifications

Description

Dimensions

134 x 94 x 52 mm

Weight

Display version: 277 g, Others: 270 g

Housing material

Top: PC

Bottom: ABS

IP protection

IP651

Conformity with standards

Description

EMC directives

EMC-Directive 2014/30/EU:

EN 61000-6-1:2016

EN 61000-6-2:2016

EN 61000-6-4:2007+A1:2011

Soldering material

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

Fire protection class

Corresponds to UL94-HB

FDA/GAMP directives

GAMP5