General

HF42

HF43

Device type

Humidity temperature transmitter with analog output signals

Circuit type

2-wire, loop powered

3-wire

Mechanical configuration types

D and W

Power supply and connections

HF42

HF43

Supply voltage (VDD)

10…28VDC

V min = 10 V + (0.02 x Load*) *Load resistance in ohms.

18…40 VDC or

13…28 VAC

Nominal current consumption

2 x 20 mA

< 50 mA

Electrical connections

Terminal block and M16 cable grip or ½” conduit

adapter

Polarity protection

Protective diode on V+

Humidity measurement

HF42

HF43

Sensor

ROTRONIC Hygromer ® IN-1

Measuring range

0…100 %RH

Measurement accuracy at 23 °C

±1.0 %RH

Repeatability

0.3 %RH

Long term stability

< 1 %RH / year

Sensor time constant

Typical 10 sec, 63% of a 35 to 80 %RH step change (1m/sec air flow at sensor)

Temperature measurement

HF42

HF43

Sensor

Pt100 RTD, IEC 751 1/3 class B

Measuring range limits

-50…100 °C / -58…212 °F

Measurement accuracy at 23 °C

±0.2 °C

Repeatability

0.05°C

Long term stability

< 0.1°C / year

Sensor time constant

Typical 4 sec, 63% of a step change (1m/sec air flow at sensor)

Calculated parameters

HF42

HF43

Psychrometric calculations

Dew or frost point (user configurable option)

Start-up time and data refresh rate

HF42

HF43

Start-up time

3.4s (typical)

1.9s (typical)

Data refresh rate

3.4s (typical)

1.7s (typical)

Service connector

HF42

HF43

Interface type

UART(Universal Asynchronous Receiver Transmitter)

Maximum service cable length

5 m (16.4 ft)

General specifications

HF42

HF43

Optional display

LC, 1 or 2 decimals resolution, no backlight, trend and alarm indication

LC, 1 or 2 decimals resolution, backlight, trend and alarm indication

Probe material

Polycarbonate

Probe dust filter material

Polyethylene

Housing material

ABS

Housing protection grade

IP 65 (except HF45 – USB or Ethernet)

Physical dimensions

See Dimensions

Weight

250 g (8.8 oz)

Conformity with standards

HF42

HF43

CE / EMC immunity

EMC Directive 2004/108/EG:

EN 61000-6-1: 2001, EN 61000-6-2: 2005

EN 61000-6-3: 2005, EN 61000-6-4: 2001 + A11

Solder type

Lead free (RoHS directive)

Fire protection class

Corresponds to UL94-HB

FDA / GAMP directives

compatible

Environmental limits

HF42

HF43

Storage and transit

-50…+70 °C / -20...+70 °C (models with display), 0…100 %RH, non condensing

Operating limits at electronics

-40 … +60 °C / -10….60 °C (models with display), 0…100 %RH, non condensing

Temperature limits at probe

-50…+100 °C (valid for type D)

Maximum humidity at sensor

100 %RH up to 80 °C (176 °F)

75 %RH at 100 °C (212 °F)

Maximum air velocity at probe

20 m/s (3,935 ft /min)

Critical environments

Contamination/Pollutants

Configurable analog outputs

HF42

HF43

Output 1

Can be made to correspond to any parameter

Factory default parameter

Relative humidity or dew / frost point

Factory default scale

As per ordering code

Output 2

Can be made to correspond to any parameter

Factory default parameter

Temperature

Factory default scale

As per ordering code

Output 1 and Output 2

Signal type

4…20 mA

0…20 mA

4… 20 mA

0… 1 V

0… 5 V

0… 10 V

(user configurable)

User configurable scaling limits

-999.99 … 9999.99 engineering units

Maximum offset at bottom of signal range

no offset

0…1V signal range:       10 mV

0…5V signal range:       50 mV

0…10V signal range:     100 mV

0…20mA signal range:  0.2 mA

4…20mA signal range:  no offset

Short circuit tolerant

Yes

Maximum external load

500 Ω

500 Ω (current output)

Minimum external load

0 Ω

1 kΩ (0…1 V output)

5 kΩ (0…5 V output)

10 kΩ (0…10 V output)

0 Ω (current output)