HF52

HF53 / HF54 / HF56

General

Device type

Humidity temperature transmitter with analog output signals

Humidity temperature transmitter with analog output signals and optional digital output

Circuit type

2-wire, loop powered

3-wire

Mechanical configuration types

D and W

Power supply and connections

Supply voltage (VDD)

10…28VDC

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

HF53: 18…40 VDC or 12…28 VAC

HF54: 9 to 36 VDC or 7 to 24 VAC

Galvanic isolation

HF56: 100 to 240 VAC 47 to 63 Hz

Galvanic isolation

Typical current consumption

2 x 20 mA

HF53 / HF54: 100 mA

HF56:

< 50 mA at 100 VAC

< 35 mA at 240 VAC

Electrical connections

Terminal blocks and 1 x

M16 cable grip or ½”

conduit adapter

HF53 / HF54: Terminal blocks and 1 x M16

cable grip or ½” conduit adapter

HF56: Terminal blocks and 2 x M16 cable grip

Polarity protection

Protective diode on V+ (except HF56)

Fuse

HF56: 2A fuse, soldered to PCB

Calculated parameters

Psychrometric calculations

Dew point (Dp) above and below freezing

Frost point (Fp) below freezing and dew point above freezing

Wet bulb temperature (Tw)

Enthalpy (H)

Vapor concentration (Dv)

Specific humidity (Q)

Mixing ratio by weight (R)

Vapor concentration at saturation (Dvs)

Vapor partial pressure (E)

Vapor saturation pressure (Ew)

Start-up time and data refresh rate

Start-up time

60 s (typical)

3.s (typical)

Data refresh rate

20 s (typical)

1 s (typical)

Digital interface

Interface type

N/A

HF53 / HF54: RS-485 or USB + RS-485 or Ethernet + RS-485

HF56: RS-485 + Ethernet

Service connector

Interface type

UART (Universal Asynchronous Receiver Transmitter)

Maximum service cable length

5 m (16.4 ft)

General specifications

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

Housing material

ABS

Housing protection grade

IP 65

IP 65* (except models with Ethernet, only IP20)

*Only IP65 when the red service plug is mounted

Physical dimensions

See chapter Dimensions

Weight

250 g (8.8 oz)

Models with small enclosure: 250 g (8.8 oz)

Models with large enclosure: 540 g (1 lb 3 oz)

Models in aluminum enclosure: 750 g (26.5 oz)

Impact stress

IK08 according to IEC 62262 (horizontal impact)

Degree of pollution

2

Overvoltage category

-

Conformity with standards

CE / EMC immunity

EMC Directive

2014/30/EU:

EN 61000-6-1: 2007

EN 61000-6-2: 2005

EN 61000-6-3: 2007

EN 61000-6-4: 2007 +

A11: 2011

EN 50581: 2012

EN 61326-1: 2013

EMC Directive

2014/30/EU:

HF53 / HF54:

EN 61000-6-1: 2007

EN 61000-6-2: 2005

EN 61000-6-3: 2007

EN 61000-6-4: 2007 +

A11: 2011

EN 50581: 2012

HF56: EN61326-1:2013

Solder type

Lead free (RoHS directive)

Fire protection class

Corresponds to UL94-HB

FDA / GAMP directives

compatible

Environmental limits

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, noncondensing

HF53 / HF54 :

-40…+60 °C

-10…+60 °C (models with display)

HF56:

-10…50 °C (models with/out display)

0…100 %RH, noncondensing

Temperature limits at probe

Depends on probe model

Maximum humidity at sensor

100 %RH up to 80 °C (176 °F)

75 %RH at 100 °C (212 °F)

45 %RH at 125 °C (260 °F)

15 %RH at 150 °C (302 °F)

Maximum air velocity at probe

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

Critical environments

Humidity sensor: as per DV04-14.0803.02 – Critical chemicals

Maximal operating altitude

2000 metres above sea level

Configurable analog outputs

HF52

HF53 / HF54 / HF56

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)

Accuracy of analog output

±30 μA

±20 μA

±2 mV (0-1V)

±5 mV (0-10V)

User configurable scaling limits

-999.99 … +9999.99 engineering units

Short circuit tolerant

Yes

Maximum external load

500 Ω

500 Ω (current output)

Minimum external load

0 Ω

1000 Ω (voltage output)

0 Ω (current output)

Humidity and temperature measurement

See Probes > HC2A