Rotronic HF52W-D1.1.01, HF52W-X1.1.01, HF52Dh-D1.1.01, HF53Dh-D1.1.01, HF53W-X1.1.01 User manual

E-M-HF5-V3_5

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Rotronic AG
Bassersdorf, Switzerland

HygroFlex HF5 Humidity Temperature
Transmitters: User Guide

HygroFlex HF5

Humidity Tempera ture Tr ans mitters

User Guide

Instruction Manual

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Rotronic AG
Bassersdorf, Switzerland

HygroFlex HF5 Humidity Temperature
Transmitters: User Guide

Instruction Manual

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Table of contents

1

Overview .............................................................................................................................................. 3

2 Mechanical configurations and dimensions ..................................................................................... 4

2.1 Supply voltage up to 40 VDC / 28 VAC (ABS housing) .................................................................... 4

2.2 Supply voltage up to 40 VDC / 28 VAC (Alu housing) ...................................................................... 5

2.3 Supply voltage 100…240 VAC (ABS housing) ................................................................................. 5

2.4 Models with USB or Ethernet interface ............................................................................................. 6

3 General description ............................................................................................................................. 6

3.1 Power supply options ....................................................................................................................... 6

3.2 Measured parameters ...................................................................................................................... 7

3.3 Calculated parameters ..................................................................................................................... 7

3.4 Analog output signals ....................................................................................................................... 7

3.5 Digital outputs ................................................................................................................................... 8

3.6 Service connector ............................................................................................................................. 8

3.7 Probe ................................................................................................................................................ 8

3.8 HW4 software version compatibility .................................................................................................. 8

4 User configurable settings and functions ......................................................................................... 8

4.1 Function overview ............................................................................................................................. 9

4.2 Interaction between the HF5 and probe functions .......................................................................... 10

4.3 Analog output signal type (except HF52) ........................................................................................ 11

5 Mechanical installation ..................................................................................................................... 11

5.1 General guidelines .......................................................................................................................... 11

5.2 HF5 enclosure ................................................................................................................................ 12

5.3 Installation of the HF5 type W (surface mount)............................................................................... 13

6 Electrical installation ........................................................................................................................ 13

6.1 General wiring guidelines ............................................................................................................... 13

6.2 Guidelines for RS-485 wiring .......................................................................................................... 15

6.3 Cable grip and cable specifications ................................................................................................ 15

6.4 Wiring ............................................................................................................................................. 16

7 Operation ........................................................................................................................................... 29

7.1 HF5 analog outputs ........................................................................................................................ 29

7.2 HF5 digital outputs .......................................................................................................................... 29

7.3 Display and keypad option ............................................................................................................. 30

7.4 Internal menu (optional keypad and display) .................................................................................. 30

7.5 Displayed parameters (optional keypad and display) ..................................................................... 32

8 Maintenance....................................................................................................................................... 32

8.1 Service cable .................................................................................................................................. 32

8.2 Location of the service connector (mini USB type) ......................................................................... 32

8.3 Periodic calibration check of the probe ........................................................................................... 33

8.4 Cleaning ......................................................................................................................................... 34

8.5 Validation of the output signals transmission .................................................................................. 34

8.6 Fuse ............................................................................................................................................... 34

9 Firmware updates .............................................................................................................................. 34

10 Technical data ................................................................................................................................... 35

10.1 Specifications ................................................................................................................................. 35

10.2 Dew point accuracy ........................................................................................................................ 37

11 Accessories ....................................................................................................................................... 38

12 Supporting documents ..................................................................................................................... 38

13 Document releases ........................................................................................................................... 39

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Symbol

Explanation

Warning! Electric Shock!
working, make sure that there is no dangerous voltage on the device.

General warning
Please see the relevant section in the manual when this symbol appears.

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Rotronic AG
Bassersdorf, Switzerland

HygroFlex HF5 Humidity Temperature
Transmitters: User Guide

Instruction Manual

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Applicability:

This manual applies to the following HF5 series transmitters:

• 2-wire loop powered models (HF52) with firmware version 3.0

• All other models with firmware version 2.x, where 2.x can be 2.0, 2.1, etc.

Changes to the last digit of the version number reflect minor firmware changes that do not affect the manner in
which the instrument should be operated .

1 Overview

The HygroFlex HF5 transmitter series is designed for fixed installation in applications where high
measurement accuracy is required and can be used with any of the HygroClip 2 plug-in probes.

The wide assortment of HygroClip 2 humidity-temperature probes can meet almost any application
requirement. The HygroClip 2 probes feature well proven, durable sensors. Digital signal processing within the
probe ensures consistent product performance and also facilitates the task of field maintenance with features
such as potentiometer-fr ee cal ibr ati on, hot-swapping of the probe, etc.

Main features of the HF5 series:

• Interchangeable, plug-in HygroClip 2 probe (sold separately)

• Probe separation: up to 5 m / 16.4 ft (100 m / 330 ft with a digital signal booster)

• Relative humidity, temperature, dew point or other psychrometric paramet er

• 0...100%RH and -100 to 200°C (-148 to 392°F) - depe ndin g on probe mode l

• Accuracy: ± 0.8%RH and 0.1ºC / 0.2ºF

• Analog outputs only, analog and digital outputs combined or digital outputs only

• User configurable settings

• Calculation of psychrometric parameters such as the dew or frost point

• Humidity temperature calibration and adjustment

1)

• Simulator mode

• Automatic humidity sensor test and drift compensation

• Sensor failure mode

• Data recording

1) Except model HF52 (2-w ir e circ uit typ e)
The ability for the user to easily update both the HF5 and HygroClip 2 probe firmware means that instruments
of the HF5 series can be kept up-to-date regarding any future functionality improvement.

Alternating current
Protective Earth => Indicates a protective conductor terminal

Touching this part may cause a fatal electric shock. If physical contact is necessary while

1)

1)

1)

If the instructions in the manuals are not followed, the security of the equipment cannot b e guaran teed .

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Probe

Probe

NOTE:

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Rotronic AG
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HygroFlex HF5 Humidity Temperature
Transmitters: User Guide

Page

2 Mechanical configurat ions and dimensions

Depending on the supply voltage, the HF5 uses three different sizes of enclosure

2.1 Supply voltage up to 40 VDC / 28 VAC (ABS housing)

Vertical mounting applies only to:

• HF52 type D without keypad and display

• HF53 and HF54 type D without keypad and

All other models are mounted horizontally

connector

display or without digital option

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connector

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Type D: duct mount

Type W: wall mount

Probe

Probe

Probe

Probe

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HygroFlex HF5 Humidity Temperature
Transmitters: User Guide

2.2 Supply voltage up to 40 VDC / 28 VAC (Alu housing)

connector

connector

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2.3 Supply voltage 100…240 VAC (ABS housing)

connector

connector

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USB or Ethernet interface

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Transmitters: User Guide

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2.4 Models with USB or Ethernet interface

3 General description

It is important to comply with the manufacturer its instructions. If these instructions are not complied with, the
safety characteristics of the HF5-device can be influenced.

3.1 Power supply options

Depending on the circuit type, the HF5 requires the following power supply:
a) HF52 (2-wire loop powered, analog outputs): 10…28 VDC - depending on the load connected to the

output(s). The minimum supply voltage can be determined as follows:
V min = 10 V + (0.02 x Load*) *Load resistance in Ω.
For the maximum load of 500 Ω, the minimum supply voltage is 10 + (0.02 x 500) = 20 VDC. With both

output circuits closed, the maximum current consumption is 40 mA.

b) HF53, HF54 and HF56 (3-wire, analog outputs optionally combined with a digital output):

- HF531/532/535: 18…40 VDC / 13…28 VAC

- HF533: 6…40 VDC / 13…28 VAC

- HF534: 10…40 VDC / 12…28 VAC

- HF54: 9…36 VDC / 7…24 VAC, galvanic isolation of the analog outputs and power supply

- HF56: 100…240 VAC, galvanic isolation of the analog outputs and power supply
HF53 and HF54: with both output circuits closed, the typical current consumption is 100 mA.

HF56: typical current consumption <50 mA at 100 VAC and <35 mA at 240 VAC
Please verify the product identification label to determine which power supply option is installed on your

transmitter.

c) HF556, HF557 and HF566 (digital output only):

- HF556: 5…40 VDC / 12…28 VAC

- HF557: PoE (power over Ethernet).The HF557 is not available with a RS-485 interface and can be
powered only via a LAN.

- HF566: 100…240 VAC
Typical current consumption

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Transmitters: User Guide

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HF556 with USB interface : 100 mA
HF556 with Ethernet (TCP/IP) interface and HF557 : 300 mA
HF566 with Ethernet (TCP/IP) interface : <50 mA at 100 VAC and <35 mA at 240 VAC

3.2 Measured parameters

A HygroClip 2 from Rotronic has to be used with the HF5 transmitter.
The HygroClip 2 probe together with the HF5 transmitter measures relative humidity with a ROTRONIC
Hygromer

®

IN1 capacitive sensor and temperature with a Pt100 RTD.

3.3 Calculated parameters

Using the ROTRONIC HW4 software, the HF5 can be configured by the user to calculate one of the following
parameters:

o Dew point (Dp) above and below freezing
o Frost point (Fp) below freezing and dew point above freezing
o Wet bulb temperature (Tw)
o Enthalpy (H)
o Vapor concentration (Dv)
o Specific humidity (Q)
o Mixing ratio by weight (R)
o Vapor con centration at saturation (Dvs)
o Vapor partial pressure (E)
o Vapor saturation pressure (Ew)

Note: some of the above parameters depend on the value of the barometric pressure. Using the ROTRONIC
HW4 software, a fixed barometric pressure value can be specified. For instructions see the following HW4
manual: E-M-HW4v3-F2-005

3.4 Analog output signals

Parameter:

With the ROTRONIC HW4 software any of the two analog output signals can be made to correspond to one of
the following:

• Relative humidity

• Temperature

• Calculated parameter

Any output can also be disabled.

Output Scale:

The scale of each analog output can be set within the numerical limits of -999.99 and 9999.99. The D/A
converters used to generate the analog output signals feature a 16-bit resolution.

Signal Type:

Both analog outputs provide the same type of signal. With the exception of the HF52 (always 4…20 mA), the
type of signal can be selected with the ROTRON IC HW4 software to any of the following:

Current output: 0…20 mA, 4…20 mA (up to 15 V)
Voltage output: 0…1V, 0…5V or 0…10V (see 4.3).

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HygroFlex HF5 Humidity Temperature
Transmitters: User Guide

Instruction Manual

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3.5 Digital outputs

Models with a digital output can simultaneously transmit 3 parameters: relative humidity, temperature and
calculated parameter

a) RS-485 serial interface

Some models of the HF5 are equipped with a RS-485 serial interface. This can be used to connect together
up to 64 devices in a multi-dropped arrangement. In principl e , an unlimit ed numb er of such netw or ks can be
monitored with the HW4 software, but each RS-4 85 mult i-drop network is limited to 64 devices. The HF5 can
be used either as a slave or a master, without special configuration. The master is automatically the device
that is directly connected to a PC by means of a USB port or Ethernet (TCP/IP) port.

RS-485 Compatibility: The communication protocol used by the HF5 and other AirChip 3000 products is not
compatible with the protocol used by the previous generation of ROTRONIC instruments. Do not connect
legacy products and AirChip 3000 products to the same RS-485 multi-drop network.

b) USB or Ethernet interface

Some models of the HF5 are available with a USB or Ethernet client interface in addition to the RS-485
interface. In this case the protection grade of the HF5 enclosure is no longer IP65 / NEMA 4 rated.

3.6 Service connector

The client service connector is a UART digital interface (Universal Asynchronous Receiver Transmitter) with a
mini-USB type connector. This allows connecting the HF5 with a service cable to a PC running the
ROTRONIC HW4 software. See “Maintenance” for the location of the service connector and for the type of
service cable to be used. The service connector is used to configure the HF5 and to and update its firmware
with the HW4 software.

Note: any digital output (USB, Ethernet and RS-485) offers the same functionality as the service connector.

3.7 Probe

The HF5 is compatible with all available models of HygroClip 2 probes. For detailed information on the probes
see document E-M-HC2 Probes-V1.

3.8 HW4 software version compatibility

The HF5 version 2 requires HW4 version 3.0.0 or higher for full functionality of the Device Manager function.

4 User configurable set ti ngs a nd f unctions

The HF5 ships configured as specified on the customer order. Models with analog outputs only can be
installed and used just as any conventional humidity and temperature transmitter and most users will never
need to use the HF5 configurable settings and functions. Models with a digital output generally require some
configuration by the user.

Making use of the HF5 and probe configurable settings and functions is entirely up to the user and the
appropriate settings depend on the user application. We have provided below a short description of the HF5
and probe functions and also indicated the factory default settings.

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AirChip 3000 Functions

Description

► Humidity / temperature adjustment

o 1-point or multi-point humidity calibration or adjus tme nt

o Generate calibration and adjustment protocols

► Automatic humidity sensor test

Tests the humidity sensor for drift caused by contaminants and

Not available when the probe is connected to a HF52

► Data recording

The data recording function differs from a true data logging

Not available when the probe is connected to a HF52

Functions

Description

► Simulator mode

Used to make the HF5 generate fixed values for the humidity,
enabled or disabled

Functions

Description

► Device write protection

Used to protect the HF5 with a password to prevent
enabled or disabled

► Internal menu access from keypad

Used to prevent accidental changes to the HF5 settings and
the optional keypad. Can be enabled or disabled

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Rotronic AG
Bassersdorf, Switzerland

HygroFlex HF5 Humidity Temperature
Transmitters: User Guide

4.1 Function overview

MEASUREMENT ACCURACY AND RELIABILITY (PROBE FUNCTIONS)

o 1-point or 2-point temperature calibration or adjust me nt
o Generate a time stamp for calibrations and adjustment s
o Retain and view last adjustment date and adjustment values

and optional drift compensation

can be used to automatically apply a correction. The test is
automatically carried out at regular intervals of time. Can be
configured, enabled, or disabled

The humidity sensor status can be verified either with the HW4
software or with the instrument display (if available) and is
shown as Good, SQ-tuned (corrected for drift) or Bad (defective)

function in the sense that the AirChip 3000 does not time stamp
the data. The data recording function can be use to investigate
events such as a sensor malfunction as well as to retrieve data
that would otherwise be lost

o Start or stop data recording - up to 2000 value pairs (%RH

and temperature). Starting a recording session erases all
previously recorded data

o The recording mode and log interval can be specified
o When the device is powered off, the recording session is

paused but not ended As long as the recording se ss ion has
not been ended, the device automatically resumes recording
data when powered up again

o The recorded data can be downloaded to a PC with the

HW4 software, time stamped and viewed

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MEASUREMENT LOOP VALIDATION

temperature and calculated parameter. Can be configured,

DEVICE SAFEGUARDS

unauthorized digital access by a digital user. Can be configured,

temperature-humidity adjustment by disabling the MENU key on

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AirChip 3000 Functions

Description

► Limit humidity output to 100 %RH

This probe function is used to prevent the humidity signal from
Can be enabled or disabled

► Out-of-limit value alarm

Used to specify the normal range for humidity, temperature and

seen on the optional display

► Bad sensor alarm

This is a built-in probe function. Cannot be disabled

that the HF5 is set to monitor probe alarms

► Fail safe mode

Used to specify a "safe" fixed value for humidity and for

Can be configured, enabled or disabled

Device protection

X

X

Individual to the HF5 and HC2 probe

RS-485 address

X

X

Individual to the HF5 and HC2 probe

User defined description
replaced with the HF5 Input Name

Psychrometri c cal cu l at ion
HF5 setting overrides HC2 probe setting

Depending on the model, the data refresh rate is as follows:

Other models: typically 1 s

Generates fixed humidity and / or temperature value
When enabled, the HF5 settings override the HC2 probe settings

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Rotronic AG
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HygroFlex HF5 Humidity Temperature
Transmitters: User Guide

PROCESS PROTECTION AND PROTECTION OF OTHER DEVICES

exceeding 100 %RH when condensation forms on the sensor.

the calculated parameter depending on the user application.
Can be configured, enabled or disabled

Out-of-limit values trigger a digital alarm which can be also be

A bad humidity or temperature sensor triggers a digital alarm
which can be also be seen on the optional HF5 display provided

temperature (HF5 or probe) in the event of:

o Loss of communication with the probe (HF5 function)
o Sensor failure (probe function)

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4.2 Interaction between the HF5 and probe functions

It is important to note that when used together, the HF5 transmitter and HC2 probe (HygroClip 2) constitute a
2-component system. Each system component has its own microprocessor, firmware and functions. Some of
these functions are unique to each system component. Other functions are found in both components.

HF52 (2-wire, loop powered transmitter): due to the necessity of limiting the current consumption of the
combination of HF52 and HC2 probe to less than 4 mA, several probe functions such as RH sensor test, data
recording and probe adjustment are not available with the HF52.

The functions and settings of the HF5 transmitter and HygroClip 2 probe (HC2) operate together as indicated
below:

Function / Setting HF5 HC2 Notes

Device Name

Calculation

Data refresh rate

Simulator function

X X

X X

X

X X

The device name of the HC2 probe is not displayed by HW4 and is

HF52: typically 20 s

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The HF5 setting overrides HC2 probe setting regarding the HF5

temperature unit for both the HF5 and probe.

The HF5 settings are independent from the HC2 probe settings.

monitor probe alarms).

Parameter and scale
The HC2 probe settings have no effect on the HF5

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Transmitters: User Guide

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Function / Setting HF5 HC2 Notes

signals. The HC2 probe settings still apply when the probe is used

Unit system

Out-of-limits value alarm

Analog outputs

X X

X X

X X

alone

Make sure to use the same humidity symbol and the same

The HC2 probe settings have an effect only when the HF5 is
enabled to monitor alarms generated by the probe

When out-of-limit values have been defined for the same parameter
for both the HF5 and probe, any alarm is triggered based on the
narrowest set of limits (assuming that the HF5 has been set to

4.3 Analog output signal type (except HF52)

Both analog outputs of the HF5 provide the same type of signal. With the exception of the HF52 (always
4…20 mA), the type of signal can be selected with the ROTRONIC HW4 software to any of the following:
0…20 mA, 4…20 mA, 0…1V, 0…5V or 0…10V. To select the analog signal type proceed as follows:

• Use the appropriate model of service cable (see Maintenance > Service Cable) t o conne ct the
service connector of the HF5 to a USB port of a PC with the HW4 software installed (HW4 3.0.0 or
higher). Note that the ROTRONIC USB driver must be installed on the PC as explained in the HW4
manual E-M-HW4v3-Main

• Start HW4 on the PC and search for the HF5 (HW4 Main Menu Bar > Devices and Groups > Searc h
for USB Masters).

• After finding the HF5 with HW4, expand the device tree to see the HF5 functions. Select Device
Manager.

• For further instructions see HW4 manual E-M-HW4v3-F2-005

No adjustment is required after changing the type of output signal.

5 Mechanical installa t ion

5.1 General guidelines

Relative humidity is extremely dependent on temperature. Proper measurement of relative humidity requires
that the probe and its sensors be at exactly the temperature of the environment to be measured. Because of
this, the location where you choose to install the probe can have a significant effect on the performance of the
instrument. The following guidelines should guarantee good instrument performance:

a) Select a representative location: install the probe where humidity, temperat ure and pr es s ure

conditions are representative of the envir on me nt to be meas ured.

b) Provide good air movement at the probe: air velocity of at least 200 ft/ minute (1 meter/second)

facilitates adaptation of the probe to changing temperature.

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c) Avoid the following: (1) Close proximity of the probe to a heating element, a cooling coil, a cold or

hot wall, direct exposure to sun rays, etc. (2) Close proximity of the probe to a steam injector,

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Vertical:

•

•

digital option

Horizontal:

•

• HF53, HF54 type D with

•

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humidifier, direct exposure to precipitation, etc. (3) Unstable pressure condition s result ing from

excessive air turbulence.
d) Immerse as much of the probe as possible in the environment to be measured.
e) Prevent the accumulation of condensation water at the level of the sensor leads. Install the

probe so that the probe tip is looking downward. If this is not possible, install the probe horizontally.

5.2 HF5 enclosure

The HF5 enclosure consists of a base and a cover held together with 4 screws. To open the enclosure, use a
metric 2.5 mm or 3 mm hex key. Prior to re-assembling the enclosure, verify that the red seal is sitting properly
in its groove on the base.Installation of the HF5 type D (through wall mount)

Mounting position of the enclosure

HF52 type D without

keypad and display

HF53 and HF54 type D

without keypad and
display, and without

HF52 type D with

keypad and display
keypad and display or

with digital option

All other type D models

Mounting hardware

The QMA-15 consists of a flange and compression fitting and is designed to hold the probe of the HF5 type D
when mounted through a wall (see Accessories). The HF5 does not require any additional support.

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Horizontal:

HF52, HF53, HF54, HF55 and HF56 type W

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HygroFlex HF5 Humidity Temperature
Transmitters: User Guide

5.3 Installation of the HF5 type W (surface mount)

Mounting position of the enclosure

Mounting hardware

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Method 1: The HF5 is supplied with 2 screws, 2 drywall anchors and two rubber washers. The base of the
enclosure has 2 screw-wells (see drawing) that are normally closed at the bottom. Use the template provided
with the HF5 to drill mounting holes in the wall and insert the drywall anchors. Place a rubber washer on each
screw. Insert a screw in each well and push to open the bottom of the well.

Method 2: When a DIN-rail (35 mm / 1 3/8 “) is available use part AC5002 (not included). This is a DIN-rail
mounting kit consisting of 2 clamps that attach to the back of the enclosure with the screws provided.

6 Electrical installation

The safety of the installed system, where the device is integrated, is the responsibility of the builder of the
system.

6.1 General wiring guidelines

Power supply wiring

Heavy machinery and instrumentation should not share the same power supply wiring. If this cannot be
avoided, noise filters and surge protector s should be used. Most UPS devices have those features alrea dy
integrated.

Electrical Safety Warning (HF56x)

The HF5 transmitter series includes models designed to operate with a supply voltage of 100…240 VAC. For
safety reasons, the electrical installation of these models must be desig ned prov iding an adequate protection.
A form of an external circuit breaker, switch, fuse or other can be used to separate the transmitter from the
supply voltage. Appropriate saf ety war nings and instr uc tion s must be located by the transmitter in order to
prevent electrical shock with open transmitter enclosure.

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The guarantee of the security of the whole system which includes the HF5 is the responsibility of the
developer of the system.

When connecting, ensure that the earth wire is longer than the live wires, so that it will be the last wire to
break if the supply cable is stretched (a s show ed in the pictu r e).

Ensure that the cable gland is tightened so that this is not detachable by hand.

The electrical installation of the device must be performed by a qualified electrician and correspond with IEC
(International Electrotechnical Commission) requirements.

It is important to ensure, to use a suitable mains cable:

- Voltage Range min. 240 VAC

- Cable cross-section : 2 ... 8 mm

- Max Wire cross : 2.5 mm2

- Recommended : 3x075mm

2

H05VV-F Cable

General guidelines for signal cables

The following guidelines are derived from International Standard IEC 61158 / IEC 61784 for the transmission
of signals by copper wires. When planning an installation, the rules provided by IEC 61158 / IEC 61784should
be followed under consideration of local circumstances to determine the position of machines and equipment.

Whenever the level of electromagnetic interference is expected to be high, both the instruments and signal
cables should be placed as far away as possible from the source of interference.
In general, signal cables should be installed in bundles or channels / conduits, separate from other cables as
indicated in the table below:

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Rotronic AG
Bassersdorf, Switzerland

HygroFlex HF5 Humidity Temperature
Transmitters: User Guide

• Bus signals such as RS485

• Data signals for PCs, printers etc.

• shielded analog inputs

• unshielded direct current (<= 60V)

• shielded process signals (<= 25 V)

• unshielded alternate current (<= 25V)

• coaxial cables for CRT monitors

• direct current from 60 V to 400 V

(unshielded)

• alternate current from 25V to 400 V
(unshielded)

• direct and alternate current > 400 V
(unshielded)

• Telephone lines

• lines leading into EX-rated areas

Instruction Manual

Document Type

Page

in common bundles or channels / conduits

in separated bundles or channels /
conduits, without minimum distance /

in separated bundles or channels /
conduits, without minimum distance

15 of 39

Lightning protection

Cabling in areas with a risk of lightning requires a lightning protection. For cabling underground in between
buildings, we recommend the use of special fiber optic cables. If this is not possible, use copper cables that
are suitable for underground installation.

6.2 Guidelines for RS-485 wiring

See document E-DV04-RS485.01: RS485 Network Installation and Start-up Guidelines

6.3 Cable grip and cable specifi cat io n s

Depending on the model, the HF5 is supplied either with one or two M16 sealing cable grips or with one or two
½” conduit adapters. The M16 cable grip provides effective sealing only with cables having the proper outside
diameter. Preferably, use a cable with an outside diameter of 6 to 8 mm (0.236 to 0.314 inch) with 18 AWG
wires.

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Document title

Terminals

Description

Temperature output (+)
OUT-2

K2-1: V+

Power supply: 10…28 VDC (+)

Terminals

Description

Relative humidity or dew point (+)
OUT-1

K1-1: V+

Power supply: 10…28 VDC (+)

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Rotronic AG
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HygroFlex HF5 Humidity Temperature
Transmitters: User Guide

6.4 Wiring

HF52: 2-wire, loop powered transmitter

Electrical diagram

Terminal block diagram

Instruction Manual

Document Type

Page

16 of 39

The maximum permissib le cable length connecting th e
HF52 to other devices is determined by the total
resistance resulting from the addition of the cable
resistance and that of the devices connected in series
with the unit.
This resistance should not exceed 500 Ω.

K2-2: T-OUT

K1-2: H-OUT

Note: connect the + of the power supply to only one of the V+ terminals. The two terminals marked V+ are
internally connected.

Measuring humidity or temperature only

Operation of the HF52 does not require both current loops to be closed. When using the HF52 to measure
either humidity only or temperature only, close only the loop that is being used.

Using the ROTRONIC HW4 software, any unused output of the HF52 can be disabled.

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Terminals

Description

Power supply: 18…40 VDC (+)
or 12…28 VAC (Phase)

Terminals

Description

Temperature output (+)

V

+

OUT

2

OUT 1 GND B 2

U

B

V

+

B

2

U

B

OUT

2

OUT

1

GND

Document code Unit

Rotronic AG
Bassersdorf, Switzerland

HygroFlex HF5 Humidity Temperature
Transmitters: User Guide

HF53: 3-wire transmitter

Electrical diagram for voltage outputs

Electrical diagram for current outputs

Terminal block diagram (analog outputs only)

Type D and W (horizontal mount)

Instruction Manual

Document Type

Page

17 of 39

The maximum permissible cable length can be
determined under consideration of the voltage drop
caused by the current flow ing to the devices con nected
to the unit. The voltage dro p in the ca ble depe nds both
on cable resistance and on the equivalent resistance
of the devices connected in parallel to the unit. The
total resistance connected to each unit output should
be at least 1000 Ω. Cable resistance should not be
more than 1/1000 of the load resistance.

The maximum permissible cable length, connecting
the unit to other devices, is determined by the total
resistance resulting from the addition of the cable
resistance and that of the devices connected in
series with the unit.
This resistance should not exceed 500 Ω.

K1-1: V- Power supply (-) or neutral

K1-2: V+

K1-3:

Protective ground (see note below)

K2-4: GND Ground (tied with other GND)

K2-3: GND Ground (tied with other GND)

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K2-2: OUT2

K2-1: OUT1 Relative humidity or dew point (+)

E-M-HF5-V3_5

Document title

Terminals

Description

Terminals

Description

Power supply: 18…40 VDC (+)
or 12…28 VAC (Phase)

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Rotronic AG
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HygroFlex HF5 Humidity Temperature
Transmitters: User Guide

Type D (vertical mount)

Instruction Manual

Document Type

Page

K2-4: GND Ground (tied with other GND)

K2-3: GND Ground (tied with other GND)

K2-2: OUT2 Temperature output (+)

K2-1: OUT1 Relative humidity or dew point (+)

18 of 39

K6-1: V- Power supply (-) or neutral

K6-2: V+

K6-3:

Protective ground (see note below)

Note: Terminals K1-3 or K6-3 (protective or earth ground) ar e tied with GND. If this is not wanted, a land
(B18) on the PCB must be removed.

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Document title

Terminals

Description

Power supply: 18…40 VDC (+)
or 12…28 VAC (Phase)

Terminals

Description

Terminals

Description

RS-485 Bi-directional
TX- / RX -

RS-485 Bi-directional
TX+ / RX +

DC (+) 15…24 VDC (+)
(optional, see note below)

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HygroFlex HF5 Humidity Temperature
Transmitters: User Guide

Instruction Manual

Page

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Document Type

Terminal block diagram (analog outputs and digital option)

Type D and W (horizontal mount)

K1-1: V- Power supply (-) or neutral

K1-2: V+

K1-3:

K2-4: GND Ground (tied with other GND)

K2-3: GND Ground (tied with other GND)

K2-2: OUT2 Temperature output (+)

K2-1: OUT1 Relative humidity or dew point (+)

Protective ground (see note below)

K3-4: D-

K3-3: D+

K3-2: GND Ground / Power supply (-)

K3-1: PWR

Notes:
Terminal K1-3: this terminal (protective or earth ground) is tied with GND. If this is not wanted, a land (B18)

on the PCB must be removed.
Terminal block K3 (RS-485): terminals K3-1 and K3-2 can be used to power the HF53 from a 15 to 24 VDC

power supply connected to the RS-485 main data line. In this case, do not use terminals K1-1 and pin K1-2
(normally used to power the HF53).

USB or TCP/IP port: this port is optional

Measuring humidity or temperature only

Operation of the HF53 does not require both current loops to be closed. When using the HF53 to measure
either humidity only or temperature only, close only the loop that is being used.

Using the ROTRONIC HW4 software, any unused output of the HF53 can be disabled.

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U

B

DC

DC

V+

GND

OUT2

OUT

1

GND

U

B

DC

DC

V+

GND

OUT2

OUT1

GND

Document code Unit

Rotronic AG
Bassersdorf, Switzerland

HygroFlex HF5 Humidity Temperature
Transmitters: User Guide

Page

HF54: 3-wire transmitter, galvanic isolation of the analog outputs

Electrical diagram for voltage outputs

The maximum permissible cable length
can be determined under consideration
of the voltage drop caused by the current
flowing to the devices connected to the
unit. The voltage drop in the cable
depends both on cable resi stance and on
the equivalent resistance of the devices
connected in parallel t o the unit. T he total
resistance connected to ea ch unit ou tput
should be at least 1000 Ω. Cable
resistance should not be more than
1/1000 of the load resistance.

Electrical diagram for current outputs

The maximum permissible cable length,
connecting the unit to other devices, is
determined by the total resistance
resulting from the addition of the cable
resistance and that of the devices
connected in series with the unit. This
resistance should not exceed 500 Ω.

Terminal block diagram (analog outputs only)

Instruction Manual

Document Type

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Document title

Terminals

Description

Power supply: 18…40 VDC (+)
or 12…28 VAC (Phase)

Terminals

Description

Terminals

Description

Terminals

Description

Power supply: 18…40 VDC (+)
or 12…28 VAC (Phase)

Document code Unit

Rotronic AG
Bassersdorf, Switzerland

HygroFlex HF5 Humidity Temperature
Transmitters: User Guide

Type D and W (horizontal mount)

Type D (vertical mount)

Instruction Manual

Document Type

Page

K1-1: V- Power supply (-) or neutral

K1-2: V+

K1-3: Protective ground (see note below)

K2-4: GND Ground (tied with other GND)

K2-3: GND Ground (tied with other GND)

K2-2: OUT2 Temperature output (+)

K2-1: OUT1 Relative humidity or dew point (+)

21 of 39

Note: Terminals K1-3 or K6-3 (protective or earth

ground) are tied with GND. If this is not wanted, a
land (B18) on the PCB must be removed.

K2-4: GND Ground (tied with other GND)

K2-3: GND Ground (tied with other GND)

K2-2: OUT2 Temperature output (+)

K2-1: OUT1 Relative humidity or dew point (+)

K6-1: V- Power supply (-) or neutral

K6-2: V+

K6-3:

Protective ground (see note below)

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Terminals

Description

Power supply: 18…40 VDC (+)
or 12…28 VAC (Phase)

Terminals

Description

Terminals

Description

RS-485 Bi-directional
TX- / RX -

RS-485 Bi-directional
TX+ / RX +

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HygroFlex HF5 Humidity Temperature
Transmitters: User Guide

Instruction Manual

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Terminal block diagram (analog outputs and digital option)

Type D and W (horizontal mount)

K1-1: V- Power supply (-) or neutral

K1-2: V+

K1-3:

K2-4: GND Ground (tied with other GND)

K2-3: GND Ground (tied with other GND)

K2-2: OUT2 Temperature output (+)

K2-1: OUT1 Relative humidity or dew point (+)

Protective ground (see note below)

K3-4: D-

K3-3: D+

K3-2: GND Ground

K3-1: PWR Not used

Notes:
Terminal K1-3: this terminal (protective or earth ground) is tied with GND. If this is not wanted, a land (B18)

on the PCB must be removed.
USB or TCP/IP port: this port is optional

Measuring humidity or temperature only

Operation of the HF54 does not require both current loops to be closed. When using the HF54 to measure
either humidity only or temperature only, close only the loop that is being used.

Using the ROTRONIC HW4 software, any unused output of the HF54 can be disabled.

© 2009-2013; Rotronic AG E-M-HF5-V3_4

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Terminals

Description

Power supply: 5…40 VDC (+)
or 12…28 VAC (Phase)

Protective ground (see note
below)

Terminals

Description

RS-485 Bi-directional
TX- / RX -

RS-485 Bi-directional
TX+ / RX +

Ground / Power supply (-)
(tied with other GND)

DC (+) 15…24 VDC (+)
(optional, see note below)

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HygroFlex HF5 Humidity Temperature
Transmitters: User Guide

Instruction Manual

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Document Type

HF556: digital output

Connectors and terminal block diagram

Notes:
Terminal K1-3: this terminal (protective or earth ground) is tied with GND. If this is not wanted, a land (B18)

on the PCB must be removed.
Terminal block K3 (RS-485): terminals K3-1 and K3-2 can be used to power the HF55 from a 15 to 24 VDC

power supply connected to the RS-485 main data line. In this case, do not use terminals K1-1 and pin K1-2
(normally used to power the HF55).

WARNING: Connecting a device to an active Ethernet network can disrupt communications on the network.
Before connecting the HF5, make sure that it is properly configured for your network.

K1-1: V- Power supply (-) or neutral

K1-2: V+

K1-3:

K3-4: D-

K3-3: D+

K3-2: GND

K3-1: PWR

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Document title

~

AC

DC

AC L

AC N

OUT 2 OUT 1 GND

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HygroFlex HF5 Humidity Temperature
Transmitters: User Guide

Instruction Manual

Page

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Document Type

HF557: digital output, PoE (power over Ethernet)

This model is powered from the Ethernet LAN and has no terminal blocks.

WARNING: Connecting a device to an active Ethernet network can disrupt communications on the network.
Before connecting the HF5, make sure that it is properly configured for your network.

HF56: 100…240 VAC supply voltage

Electrical diagram for voltage outputs

The maximum permissible cable length can be determined under consideration of the voltage drop on the
cable.
The voltage drop in the cable depends both on cable resistance and on the equivalent resistance of the
devices connected in parallel to the unit.
The total resistance connected to each unit output has to be at least 1000 Ω.
Cable resistance should not be more than 1/1000 of the load resistance.

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~

AC

DC

AC L

AC N

OUT

2

OUT

1

GND

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HygroFlex HF5 Humidity Temperature
Transmitters: User Guide

Instruction Manual

Page

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Document Type

Electrical diagram for current outputs

The maximum permissible cable length, connecting the unit to other devices, is determined by the total
resistance (cable resistance + devices connected in series with the unit).
This resistance should not exceed 500 Ω.

Measuring humidity or temperature only

Operation of the HF56 does not require both current loops to be closed. When using the HF56 to measure
either humidity only or temperature only, close only the loop that is being used.

Using the ROTRONIC HW4 software, any unused output of the HF56 can be disabled.

© 2009-2013; Rotronic AG E-M-HF5-V3_4

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Terminals

Description

Document code Unit

Rotronic AG
Bassersdorf, Switzerland

HygroFlex HF5 Humidity Temperature
Transmitters: User Guide

Terminal block diagram (analog outputs only)

AC N Power supply neutral: 100 to 240 VAC

AC L Power supply phase: 100 to 240 VAC

OUT1 Relative humidity or dew point

OUT2 Temperature output

GND Ground (tied with other GND)

GND Ground (tied with other GND)

Protective ground

Instruction Manual

Document Type

Page

26 of 39

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Terminals

Description

RS485 Bi-directiona l TX+ / RX +
(< 10,5 V)

RS485 Bi-directiona l TX- / RX –
(< 10,5 V)

Document code Unit

Rotronic AG
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HygroFlex HF5 Humidity Temperature
Transmitters: User Guide

Terminal block diagram (analog outputs and digital option)

AC N Power supply neutral: 100 to 240 VAC

AC L Power supply phase: 100 to 240 VAC

GND RS485 Ground

D+

D-

OUT1 Relative humidity or dew point

OUT2 Temperature output

GND Ground (tied with other GND)

GND Ground (tied with other GND)

Protective ground

Instruction Manual

Document Type

Page

27 of 39

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Terminals

Description

RS485 Bi-directiona l TX+ / RX +
(< 10,5 V)

RS485 Bi-directiona l TX- / RX –
(< 10,5 V)

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Rotronic AG
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HygroFlex HF5 Humidity Temperature
Transmitters: User Guide

HF566: 100…240 VAC supply voltage, digital output

Terminal block diagram (analog outputs and digital option)

AC N Power supply neutral: 100 to 240 VAC

AC L Power supply phase: 100 to 240 VAC

GND RS485 Ground

D+

D-

OUT1 Relative humidity or dew point

OUT2 Temperature output

GND Ground (tied with other GND)

GND Ground (tied with other GND)

Protective ground

Instruction Manual

Document Type

Page

28 of 39

Grounding (all models)

We generally recommend grounding the (-) side of the power supply, especially if the electronics will be
subjected to a low humidity environment (35 %RH or less).

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HygroFlex HF5 Humidity Temperature
Transmitters: User Guide

Instruction Manual

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7 Operation

7.1 HF5 analog outputs

Use the HW4 software to configure the analog outputs of the HF5 as desired, complete the mechanical and
electrical installation, connect the probe and simply power up the HF5.

7.2 HF5 digital outputs

The digital outputs of the HF5 use the standard RO-ASCII protocol and do not offer any other option. Users
who wish to read the measurement data without the HW4 software should consult ROTRONIC.

The different types of digital interface available with the HF5 are best used with a PC with the HW4 software
installed (version 3.0.0 or higher). In principle, users should be able to use communication software other than
HW4 to read measurement data from the HF5. In this case, communication is limit ed to the RDD (data
request) and REN (RS-485 address change) commands described separately in document E-M-AC3000-CP.

IMPORTANT: Depending on the type of digital interface, either the PC or the HF5 must be configured
by the user as indicated below.

a) USB connection

Prior to connecting the HF5 to a USB port you must install the ROTRONIC USB driver on the PC (available
from the HW4 CD or from www.rotronic-humidity.com). For instructions see the HW4 manual E-M-HW4v3-
Main (§ 7.3)

b) Ethernet (TCP/IP) connection

Prior to connecting the HF5 to an active Ethernet network you must configure the TCP/IP settings of the HF5
using either the HW4 software (version 2.1.0 or higher) or the TCP/IP configuration tool available from
www.rotronic-humidity.com. For instructions see the HW4 manual E-M-HW4v3-Main (§ 7.4) and technical
note IN-E-TCPIP-Conf

WARNING: Connecting a device to an active Ethernet network can disrupt communications on the network.
Before connecting the HF5, make sure that it is properly configured for your networ k

c) RS-485 serial interface (multi-drop)

Instructions for using the HF5 with a RS-485 network are provided in the following manuals:
E-M-HW4v3-Main (§ 7.5), E-M-HW4v3-F2-005 and E-DV04-RS485.01.

Notes:
o Inst ruments connected to the same RS-485 network must use the same baud rate and each instrument

must be given a unique RS-485 address (the address requirement applies to the HF5 but not to its probe)

o RS-485 Compatibility: The communications protocol used by the HF5 is the RO-ASCII protocol. This

protocol is not compatible with the protocol used by the previous generation of ROTRONIC products. Do
not connect legacy products and the HF5 to the same RS-485 multi-drop network.

The specifications of the RS-485 interface are as follows:
Baud rate : 19200

Parity : none
Data bits : 8
Stop bits : 1

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Main Menu

Menu Items

Selections / Information

Notes

Device Settings

Units

Metric / English

Contrast

LC display contrast adjustment

Trend

On / Off

Trend indication on the display

Device Information

Version

Firmware version

Serial Nbr

Serial number

Address

RS-485 address

Type

Device type

Name

Device name

User defined

Probe Information

Version

Firmware version

Serial Nbr

Serial number

Address

RS-485 address

MENU key: open / close menu

ENTER key: menu item selection

Menu navigation keys + / -

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Transmitters: User Guide

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7.3 Display and keypad option

Except for the HF52 (2-w ire cir cuit t y pe), the LC
display of the HF5 has a backlight.

The upper line corresponds to relative humidity the
bottom line corresponds to temperature.
If enabled the third line corresponds to the calculated
Parameter.

The display can be configured to show a trend indicator on each line:

▲: increasing value
▼: decreasing value

In the event of an alarm the display shows the symbol [ ! ] to the right of the value.
For instructions about configuring the display, see the following HW4 manual: E-M-HW4v3-F2-005.

7.4 Internal menu (optional keypad and display)

Note: Unauthorized access to the menu can be prevented by disabling the “display menu” setting
(use the HW4 software > Device Manager > Display)

Model HF52 (2-wire circuit type):

Change value up / down

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Main Menu

Menu Items

Selections / Information

Notes

Name

Device name

User defined

Main Menu

Menu Items

Selections / Information

Notes

Device Settings

Units

Metric / English

Back Light

Key Press / On / Off

Display backlight mode

Contrast

LC display contrast adjustment

Trend

On / Off

Trend indication on the display

Device Information

Version

Firmware version

Serial Nbr

Serial number

Address

RS-485 address

Type

Device type

Name

Device name

User defined

Probe Information

Version

Firmware version

Serial Nbr

Serial number

Address

RS-485 address

Name

Device name

User defined

SensorTest

Humidity sensor status

Off / Good / SQ-Tuned / Bad

Data recording by the probe
(max. 2000 values)

Humidity Adjust

RefValue

Humidity reference value

± 0.1 %RH steps

Number of cal. points in probe
memory

<Acquire>

Save cal. point to probe mem o r y

<Delete>

Erases all calibration points

Effect depends on number of
calibration points

Temperature Adjust

Temperature reference
value

<Adjust>

1-point adjustment only (offset)

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Transmitters: User Guide

Other HF5 models:

Instruction Manual

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Document Type

Record

Acquired

<Adjust>

RefValue

o Record: both the recording mode (start / stop and the log interval cannot be changed from the menu and

are as configured with the ROTRONIC HW4 software

o SensorTest: Off means that the humidity sensor has not been tested due to the configuration settings of

the test. For a description of the automatic humidity sensor test and drift compensation (SQ-tuning) see
documents E-T-AC3000-DF-V1 and E-M-HW4v3-F2-005

On / Off

± 0.1 ˚C steps

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HF32

Vertical mount: the service connector is

located either on the left side or on the
right side of the enclosure.

Horizontal mount: the service
connector is loca
the enclosure (black arrow)

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Transmitters: User Guide

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7.5 Displayed parameters (optional keypad and display)

When the menu is not active, press the ENTER key to change which parameters are shown on the display:

o Relative humidity and temperature
o Relative humidity , temperature and calculated parameter (when the calculated parameter is

enabled)

8 Maintenance

8.1 Service cable

IMPORTANT:

o Use service cable AC3009 with all 2-wire, loop powered transmitters. This cable powers up the

transmitter via the service connector. Do not use any other method for powering the transmitter when
using this cable AC3009 as this will create a ground loop and damage the transmitter. For the same
reasons do not use cable AC3006 with a 2-wire, loop powered transmitter. Only with the new HF
Firmware with SN (2xxxxxx) is this no longer required to use galvani cal ly isolat ed comput er or laptop.

o Use service cable AC3006 with all 3-wire transmitters as well as with digital models. This cable does

not provide power to the transmitter and the transmitter should powered separately when using this
cable

• Both cables AC3006 and AC3009 convert UART (service connector) to USB and are used to connect the
transmitter to a USB port of a PC running the ROTRONIC HW4 software. Prior to using any of these
cables, the ROTRONIC USB driver must be installed on the PC. Both the driver and the installation
instructions (document E-M-HW4v3-Main) are located on the HW4 CD.

8.2 Location of the service connector (mini USB type)

WARNING: the service connector is a UART interface with a mini-USB connector type. Do not connect the

service connector directly to the USB port of a PC or hub.
The service connector can be accessed without opening the enclosure after removing the small red sealing

cover.

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E-M-HF5-V3_5

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Rotronic AG
Bassersdorf, Switzerland

HygroFlex HF5 Humidity Temperature
Transmitters: User Guide

Instruction Manual

Page

33 of 39

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8.3 Periodic calibration check of the probe

Both the Pt 100 RTD temperature sensor used in the probe and associated electronics are very stable
and should not require any calibration after the initial factory adjustment.

Long term stability of the ROTRONIC Hygromer humidity sensor is typically better than 1 %RH per year.
For maximum accuracy, calibration of the probe should be verified every 6 to 12 months. Applications
where the probe is exposed to significant pollution may require more frequent verifications.

Note: the HygroClip 2 probe cannot be adjusted when connected to model HF52 (2-wire circuit
type)

a) Procedure for adjusting the probe using the optional keypad (except model HF52)

Temperature adjustment

The keypad of the HF5 allows only a 1-point adjustment of temperature. The effect of a 1-point
temperature adjustment is to add the same offset to all measured values.

• When temperature is stable, press the MENU key to show the internal menu on the display

• Use the (-) key to select Temperature Adjust and press the ENTER key

• Make sure that the text line beginning with RefValue is highlighted and press the ENTER key

• Use the (+) or (-) key to change the reference value to match the temperature reference

• Use the (-) key to highlight the Adjust text line and press the ENTER key

• The HF5 confirms the adjustment with the message “Adjust OK”

• Press the MENU key twice to exit the menu and return the HF5 to normal operation

Notes:

o Any temperature adjustment should be done prior to adjusting humidity.
o The calibration point is automatically deleted from the probe memory after an adjustment
o Because the HF5 has no real time clock, the date of the adjustment is not written to the probe. If

retaining the adjustment date is important, use the HW4 software to adjust the probe.

Humidity adjustment

The keypad of the HF5 allows a multi-point adjustment of humidity. The effect of a humidity adjustment
depends on the number of calibration points present in the probe memory prior to the adjustment:

- one calibration point: offset added to all measured values

- two calibration points: offset and slope

- three or more calibration points: offset, slope, linearity

For maximum accuracy use at least 3 to 4 calibration points distributed equally across the measurement
range of interest. The calibration points (maximum 100) can be acquired in any order but we recommend
going from low humidity values to high humidity values.

• When humidity is stable, press the MENU key to show the internal menu on the display

• Use the (-) key to select Humidity Adjust and press the ENTER key

• Make sure that the text line beginning with RefValue is highlighted and press the ENTER key

• Use the (+) or (-) key to change the reference value to match the reference humidity

• Use the (-) key to highlight the Acquire text line and press the ENTER key

• Note that the “Acquired” counter is incremented by 1 (number of calibration points in the probe

memory)

• When all calibration points have been acquired, use the (-) key to highlight the Adjust text line and
press the ENTER key. Do not adjust the probe before having acquired all calibration points.

• The HF5 confirms the adjustment with the message “Adjust OK”

• Press the MENU key twice to exit the menu and return the HF5 to normal operation

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Rotronic AG
Bassersdorf, Switzerland

HygroFlex HF5 Humidity Temperature
Transmitters: User Guide

Instruction Manual

Page

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Notes:

o All calibration points are automatically deleted from the probe memory after an adjustment
o Instructions for using the ROTRONIC calibration devices and humidity standards are provided in

document E-M-CalBasics

o Because the HF5 has no real time clock, the date of the adjustment is not written to the probe. If

retaining the adjustment date is important, use the HW4 software to adjust the probe.

b) Using the HW4 software to adjust the probe connected to a HF5 (except model HF52):

• Use the appropriate model of service cable (see Maintenance > Service Cable) t o conne ct the
service connector of the HF5 to a USB port of a PC with the HW4 software installed. Note that the
ROTRONIC USB driver must be installed on the PC as explained in the HW4 manual E-M-HW4v3­Main. In the case of the HF55, a connection with the PC can be established via the USB
(ROTRONIC USB driver) or Ethernet interface.

• Start HW4 on the PC and search for the HF5 (HW4 Main Menu Bar > Devices and Groups > Search
for USB Masters).

• After finding the HF5 with HW4, expand the device tree to see the HF5 functions. Select Probe and
Probe Adjustment.

• For further instructions see HW4 manual E-M-HW4v3-A2-001

8.4 Cleaning

Device

The device can be cleaned with a wet cloth.

Probe

See document E-M-HC2 Probes-V1

8.5 Validation of the output signals transmission

If so desired, transmission of the HF5 output signals can be validated by using the simulator function. The
HW4 software is required to enable and configure this function. When this function is enabled the HF5
generates fixed digital and analog signals as specified by the user. For instructions see document

E-M-HW4v3-F2-005

8.6 Fuse

The device includes a fuse. This fuse can only be exchanged by Rotronic.

9 Firmware updates

Firmware updates will be available on the ROTRONIC website for downloading. Firmware files are given a
name that shows both to which device the file applies and the version number of the firmware. All firmware
files have the extension HEX or ROF. Procedure for updating the firmware:

• Use the appropriate model of service cable (see Maintenance > Service Cable) t o conne ct the
service connector of the HF5 to a USB port of a PC with the ROTRONIC HW4 software installed.
Note that the ROTRONIC USB driver must be installed on the PC as explained in the HW4 manual
E-M-HW4v3-Main. In the case of the HF55, a connection with the PC can be established via the
USB (ROTRONIC USB driver) or Ethernet interface.

• Copy the firmware update file from the ROTRONIC website to the PC.

• Start HW4 software on the PC and search for the HF5 (HW4 Main Menu Bar > Devices and Groups

> Search for USB Masters).

• After finding the HF5, expand the device tree to see the HF5 functions. Select Device Manager. In
the Device Manager menu bar select Tools > Firmware Update. For instructions see document
E-M-HW4v3-F2-005

© 2009-2013; Rotronic AG E-M-HF5-V3_4

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General

HF52

HF53 / HF54 / HF56

HF556 / HF557 / HF566

Humidity temperature

optional digital output

Circuit type

2-wire, loop powered

3-wire

Mechanical configuration types

D and W

Power supply and connections

HF52

HF53 / HF54 / HF56

HF556 / HF557 / HF566

Supply voltage (VDD)

10…28VDC

HF53: 18…40 VDC or

Galvanic isolation

HF556: 5…40 VDC or

Typical current consumption

2 x 20 mA

HF53 / HF54: 100 mA

HF 556: wit h USB

< 35 mA at 240 VAC

Electrical connections

Terminal blocks and 1 x

HF53 / HF54:Terminal

HF556: Connector (USB

Humidity and temperature
measurement

See document E-M-HC2 Probes > Specifications

Document code Unit

Rotronic AG
Bassersdorf, Switzerland

HygroFlex HF5 Humidity Temperature
Transmitters: User Guide

10 Technical data

10.1 Specifications

Device type

Humidity temperature
transmitter with analog
output signals

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

Page

transmitter with analog
output signals and

12…28 VAC
HF54: 9 to 36 VDC or

7 to 24 VAC
Galvanic isolation

HF56: 100 to 240 VAC
47 to 63 Hz

Instruction Manual

Document Type

35 of 39

Humidity temperature
transmitter with digital
output

12…28 VAC
HF557: PoE
HF566: 100 to 240 VAC

47 to 63 Hz

Polarity protection Protective diode on V+ (except HF56, HF57 and HF58)
Fuse HF56 / HF566: 2A fuse, soldered to PCB

M16 cable grip or ½”
conduit adapter

HF56:
< 50 mA at 100 VAC
< 35 mA at 240 VAC

blocks and 1 x M16
cable grip or ½” conduit
adapter

HF56: Terminal blocks
and 2 x M16 cable grip
or ½” conduit adapter

interface: 100 mA
HF556 / HF557 with

Ethernet interface: 300
mA

HF566:
< 50 mA at 100 VAC

or Ethernet), terminal
blocks (power supply
and RS-485) and 1 x
M16 cable grip or ½”
conduit adapter

HF557: Ethernet
Connector

HF566: Connector
(Ethernet), terminal
blocks (power supply
and RS-485) and 2 x
M16 cable grip or ½”
conduit adapter

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E-M-HF5-V3_5

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Calculated parameters

HF52

HF53 / HF54 / HF56

HF556 / HF557 / HF566

Dew point (Dp) above and below freezing

Vapor saturation pressure (Ew)

Start-up time and data refresh rate

HF52

HF53 / HF54 / HF56

HF556 / HF557 / HF566

Start-up time

60 s (typical)

3.s (typical)

3 s (typical)

Data refresh rate

20 s (typical)

1 s (typical)

1 s (typical)

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

0…20 mA

(user configurable)

±20 µA
±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)

1000 Ω (voltage output)
0 Ω (current output)

Digital interface

HF52

HF53 / HF54 / HF56

HF556 / HF557 / HF566

Interface type

N/A

Optional: RS-485 or

HF556/ HF566: RS-485

HF557: Ethernet

Service connector

HF52

HF53 / HF54 / HF56

HF556 / HF557 / HF566

Interface type

UART (Universal Asynchronous Receiver Transmitter)

Maximum service cable length

5 m (16.4 ft)

Document code Unit

Rotronic AG
Bassersdorf, Switzerland

HygroFlex HF5 Humidity Temperature
Transmitters: User Guide

Frost point (Fp) below freezing and dew point above freezing
Wet bulb temperature (Tw)
Enthalpy (H)

Psychrometric calculations

Vapor concentration (Dv)
Specific humidity (Q)
Mixing ratio by weight (R)
Vapor concentration at saturation (Dvs)
Vapor partial pressure (E)

Instruction Manual

Page

36 of 39

Document Type

Signal type 4…20 mA

Accuracy of analog output ±30 µA

Mini mum external load 0 Ω

4… 20 mA
0… 1 V
0… 5 V
0… 10 V

±2 mV (0-1V)

USB + RS-485 or
Ethernet + RS-485

or
RS-485 or
Ethernet + RS-485

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General specifications

HF52

HF53 / HF54 / HF56

HF556 / HF557 / HF566

LC, 1 or 2 decimals

indication

Housing material

ABS

IP 65

IP 65* (except models with Ethernet)

*Only IP65 when the red service plug is mounted

Physical dimensions

See chapter “mechanical configuration and dimensions”

Models with small enclosure: 250 g (8.8 oz)
Models with large enclosure: 540 g (1 lb 3 oz)

Impact stress

IK08 according to IEC 62262 (horizontal impact)

Degree of pollution

2

Overvoltage category

-

II

Conformity with standards

HF52

HF53 / HF54 / HF56

HF556 / HF557 / HF566

EMC Directive

EMC Directive

EMC Directive

Solder type

Lead free (RoHS directive)

Fire protection class

Corresponds to UL94-HB

FDA / GAMP directives

compatible

Environment a l limits

HF52

HF53 / HF54 / HF56

HF556 / HF557 / HF566

Storage and transit

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

HF53 / HF54 :

HF556 / HF557

Temperature limits at probe

Depends on probe model

100 %RH up to 80 °C (176 °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

Document code Unit

Rotronic AG
Bassersdorf, Switzerland

HygroFlex HF5 Humidity Temperature
Transmitters: User Guide

Optional display

Housing protection grade

Weight 250 g (8.8 oz)

CE / EMC imm unity

resolution, no backlight,
trend and alarm

2004/108/EG:
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

Instruction Manual

Document Type

Page

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

2004/108/EG:
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

37 of 39

2004/108/EG:
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

-40…+60 °C

-10…+60 °C (models

Operating limits at electronics

Maximum humidity at sensor

with display)
0…100 %RH, non­condensing

75 %RH at 100 °C (212 °F)
45 %RH at 125 °C (260 °F)

10.2 Dew point accuracy

See document E-M-HC2 Probes > Dew point accuracy

-40…+60 °C

-10…+60 °C (models
with display)

HF56:

-10…60 °C (models
with/out display)
0…100 %RH, non­condensing

-40…+60 °C

-10…+60 °C (models with
display)

HF566:

-10…60 °C (models
with/out display)
0…100 %RH, non­condensing

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E-M-HF5-V3_5

Document title

Document File Name

Contents

HW4 software version 3: General instructions and functions common to all
devices

Configuration procedures for ROTRONIC devices
with Ethernet (TCP/IP) interface

Temperature and humidity calibration basics
Instructions for using the ROTRONIC humidity standards

Document code Unit

Rotronic AG
Bassersdorf, Switzerland

HygroFlex HF5 Humidity Temperature
Transmitters: User Guide

Instruction Manual

Page

38 of 39

Document Type

11 Accessories

For accessories and parts such as the HW4 configuration software, service cables, calibration accessories
and spare dust filters, please see document E-M-HC2-accessories

12 Supporti ng doc um e nt s

E-M-HC2 Probes-V1

E-M-HC2-accessories

E-T-AC3000-DF-V1

E-M-HW4v3-DIR

E-M-HW4v3-Main

HygroClip 2 (HC2) Humidity Temperature Probes, User Guide

Accessories and parts for probes, indicators and transmitters

AirChip 3000 Description and Main Functions

List of the HW4 manuals

E-M-HW4v3-F2-005

E-M-HW4v3-F2-001

E-M-HW4v3-A2-001

E-M-HW4v3-DR-001

E-M-AC3000-CP

E-DV04-RS485.01

E-M-TCPIP-Conf

E-M-CalBasics

E-T-HumiDefs

Note: All document file names have an extension corresponding to the document release number. This

extension is not shown in the above table.

HW4 software version 3: Device Manager – HF5 transmitter

HW4 software version 3: Device Manager – HC2 probe series

HW4 software version 3: Probe Adjustment function AirChip 3000 devices

HW4 software version 3: Data Recording Function AirChip 3000 Devices

AirChip 3000 Communication Prot ocol Opti ons

RS485 Network Installation and Start-up Guidelines

Humidity Definitions

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E-M-HF5-V3_5

Document title

Updated this document regarding the model of service cable to
be used with 2-wire and 3-wire models.

Changed the HF52 operation limits to -40…60 °C (new

Added HF5xx-S (Alu enclosure) Model

Power Supply change 15…40 VDC to 18…40 VDC
Changes for HF56x according to actual standards.

AC3006 with 2-wires transmitters. Galvanically isolated
computer is no longer required with the new Firmware (2xxxx)

Document code Unit

Rotronic AG
Bassersdorf, Switzerland

HygroFlex HF5 Humidity Temperature

Instruction Manual

Transmitters: User Guide

Page

39 of 39

13 Document releases

Doc. Release Date Notes

V2_10 Dec. 14, 2010 Original release
V2_11 Oct. 28, 2011
V2_12 Mar. 27, 2013 Changed the HF52 operating limits at electronics

V3_0 July, 2014

V3_1 May 2015 Several points according to DIN EN 61010.1:2010
V3_2 July 24, 2015 Accuracy of analog outputs added

V3_3 Sep 08, 2015
V3_4 Sept 18, 2015 Changes for HF56x according to actual standards.

hardware version).
Added Electrical Safety Warnings.

Document Type

V3_5 Nov. 11.2015

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