ROTRONIC HF5XX-S User Manual

ROTRONIC Accessories for electrical

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ROTRONIC AG, CH-8303 Bassersdorf
Tel. +41 44 838 11 44, www.rotronic.com
ROTRONIC Messgeräte GmbH, D-76275 Ettlingen
Tel. +49 7243 383 250, www.rotronic.de
ROTRONIC SARL, 56, F - 77183 Croissy Beaubourg
Tél. +33 1 60 95 07 10, www.rotronic.fr
ROTRONIC Italia srl, I- 20157 Milano
Tel. +39 2 39 00 71 90, www.rotronic.it
ROTRONIC Instruments (UK) Ltd, West Sussex RH10 9EE
Phone +44 1293 571000, www.rotronic.co.uk
ROTRONIC Instrument Corp, NY 11788, USA
Phone +1 631 427-3898, www.rotronic-usa.com
ROTRONIC South East Asia Pte Ltd, Singapore 339156
Phone +65 6294 6065, www.rotronic.com.sg
ROTRONIC Shanghai Rep. Office, Shanghai 200233, China
Phone +86 40 08162018, www.rotronic.cn

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210

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160

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160

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HF53S, HF54S (galvanically isolated), HF55S

Terminal Description
K2-1 V –

Supply voltage – / Neutral

K2-2 V+

Supply voltage + / Phase

K2-3

Earth

K4-4 GND

GND

K4-3 GND

GND

K4-2 OUT2

Analogue temperature output +

*

K4-1 OUT1

Analogue humidity output +

**

K1-1 V+

DC (+) 17…24 VDC (+) See remarks below "K1"

K1-2 GND

GND

K1-3 D +

RS-485 Bi-directional TX + / RX +

K1-4 D –

RS-485 Bi-directional TX – / RX –

* For humidity and calculated value output settings:
OUT2 = calculated value, OUT1 = humidity
** For temperature and calculated value output settings:
OUT1 = calculated value, OUT2 = temperature

Terminal K2-3: Earth is usually not connected to GND. If this is wanted, a land on the PCB must
be removed.
Terminals K1 (RS-485): Terminals K1-3 and K1-4 can be used to feed the device (multi-point
connection). Several RS-485 devices can be operated with a strong 15 VDC power supply unit. In
this case the supply voltage at K2-1 to K2-2 is not used.
Warning: Make sure that all settings have been made correctly before integrating and connecting
the transmitters in the network.

Programming

The basic settings of the devices are made in the factory according to your order. The transmit-
ters are adjusted in the factory and therefore do not need to be checked and readjusted during
installation. The devices can be started immediately after installation.

Display
In models with LC display the value can be read directly.

A

Digital transmitter for humidity & temperature
Duct & Wall Version

Congratulations on your purchase of the new state-of-the-art HygroFlex5-Series transmitter. Please
read these short instructions carefully before installing the device

General description

The HygroFlex5-Series devices are universal transmitters for transmission of humidity and tempera-
ture measurements. Compatible with all interchangeable HC2 probes. These short instructions are
limited to a description of the main functions and installation of the device. The detailed instruction
manual can be found on the internet at:

www.rotronic.com

Dimensions / Connections

Duct version

Wall version

Mechanical installation

General recommendations
Relative humidity is extremely temperature-dependent. In order to measure it exactly, the probe and
sensors must be set exactly on the temperature level of the environment that is to be measured.
The installation site can therefore have a significant influence on the performance of the device.
Follow the guidelines below to ensure optimum performance:

a) Select a representative installation site: Install the probe at a point where the humidity, tem-

perature and pressure conditions are representative for the environment that is to be measured.

b) Make sure there is sufficient air movement around the probe: An air flow of at least 1 metre/

second accelerates and facilitates adjustment of the probe to changing temperatures.

c) Avoid:
1. Probe too close to heating elements, cooling coils, cold or hot walls, direct sunlight, etc.
2. Probe too close to steam, injectors, humidifiers or direct precipitation.
3. Unstable pressure conditions with high air turbulence.
d Insert the probe as far as possible into the environment that is to be measured.
e) Avoid accumulation of condensation at the contact wires of the sensor. Install the probe so

that the tip points down. If that is not possible, install it in horizontal position.

Mounting the duct version
To avoid measurement errors, at least 200 mm of the probe should be inserted into the environ-
ment that is to be measured.
If necessary, use the mounting flange AC1305-M + AC1307 to install the probe and fasten the
transmitter.

AC1305-M + AC1307 Mounting flange
for 15...16 mm probe

Mounting the wall version

Alignment
Mount the transmitter so that the probe points down.

Mounting variant 1
Drill the necessary holes using the drill template drawn on the packaging. Then insert the plugs
delivered with the device and mount the transmitter with the screws.

Electrical installation

Power supply
a) HF53 (3-wire with analogue outputs): 6 to 40 VDC or 6 to 28 VAC.

Max. power consumption: <3.8 Watt

b) HF54 (3-wire galvanic separated with analogue outputs): 9 to 36 VDC or 7 to 24 VAC.
Max. power consumption: <3.8 Watt.
c) HF55 (3-wire with digital output: 17 to 40 VDC or 14 to 28 VAC.
Max. power consumption: <3.8 Watt

Supply voltage / Technology
Type

Supply voltage V+

Load

Output

3 / 4-wire
HF531S

7...40 VDC / 4... 28 VAC

Max. 500

Ω

0...20 mA

HF532S

7...40 VDC / 4...28 VAC

Max. 500

Ω

4...20 mA

HF533S

6...40 VDC / 6...28 VAC

Min. 1000

Ω

0...1 V

HF534S

10...40 VDC / 8...28 VAC

Min. 1000

Ω

0...5 V

HF535S

15...40 VDC / 12...28 VAC

Min. 1000

Ω

0...10 V

Galvanically separated
HF541S

9...36 VDC

Max. 500

Ω

0...20 mA

HF542S

9...36 VDC

Max. 500

Ω

4...20 mA

HF543S

9...36 VDC

Min. 1000

Ω

0...1 VDC

HF544S

9...36 VDC

Min. 1000

Ω

0...5 VCD

HF545S

9...36 VDC

Min. 1000

Ω

0...10 VCD

Digital output
HF556S

17...40 VDC / 14...28 VAC

Digital output

HF557S

Power over Ethernet (PoE)

Digital output

Caution:

Wrong supply voltages and excessively high loading of the outputs can

damage the transmitter.

Terminal configuration / Connection diagrams
The type is defined using the table Supply voltage / Technology to then use the following connec-
tion diagrams:

Button MENU:

open / close menu

Button ENTER:
select menu point

Menu navigation:

Buttons + / - change value: increase/decrease

Note: Unauthorised use of the menu can be prevented by locking the setting “Display Menu”
(using the HW4 software > Device Manager > Display).

The main menu points

Main menu

Menu points

Options / Information

Remarks

Decive Settings

Units

Metric / English

Contrast

LC display contrast

adjustment

Trend

On / Off

Trend shown on the

display

Device Information

Version

Firmware version

Serial No.

Serial number

Address

Address RS-485

Type

Device type

Name

Device name

User-defined

Sources of error

Measured values can be influenced by the following factors:
Temperature errors :
Adaptation time too short, cold outside wall, heating elements, sunlight, etc.
Humidity errors:
Steam, water spray, dripping water or condensation at the sensor, etc. Repeatability and long term
stability are, however, not influenced by these factors even if the probe is exposed to high humidity
or saturation with steam (condensation) over a longer period of time.
Soiling:
By dust in the air. The choice of probe filter depends on the amount of soiling at the measuring
point. The filter must be cleaned or replaced periodically.

Scaling / Adjustment / Firmware update
The following settings can be made with the help of the HW4 software and either the service cable
AC3006 or AC3009:
• new scaling of the outputs
• adjustment
• firmware update
You can find a detailed description in the manual that you can download from our web site at
www.rotronic.com

Periodic calibration of the probe / transmitter
Both the Pt 100 RTD temperature sensor and the corresponding electronics are very stable and do
not normally need to be changed or calibrated after factory calibration. The long term stability of the
ROTRONIC Hygromer humidity probes is typically better than 1 %rh per year. For maximum accuracy
we recommend calibration of the probe about every six to 12 months. More frequent calibration
can be necessary in applications where the sensor is exposed to pollutants. The calibration can
be performed by the user himself on site or in the laboratory / workshop. For routine calibrations
the probe should be checked at one or two points.

The electronics of the transmitter do not normally require calibration in the field. They can be
checked easily with the help of the probe simulator in the HW4 software package. The electronics
cannot be repaired in the field and should be returned to the manufacturer in the case of problems.
For details on calibration, please see the full version of the instruction manual, which you can
download from the internet.

Technical data (measurement)

Humidity:

0...100 %rh

Temperature:

–100...200 °C

Accuracy:

Probe-dependent: ±0,8 %rh, ±0,1 K @ 23°C (HC2-S)

Protection: IP65
Outputs:

Current or voltage signals, digital output depending on order code,

UART service interface

Technical data (

Electronics operating range)

Temperature:

–40...60 °C (–10...60 °C with Display)

Humidity:

0...100 %rh, non-condensing

SHORT INSTRuCTION MANuAL

Current output

Voltage output

=

~

K2: V +

K2: V −

K2: GND

K4: OUT1
K4: OUT2

K2: V+

K2: V −

K4: GND

K4: OUT1
K4: OUT2

Equipment depending on model

Digit

al

Analog

Pow

er

Sup

ply

USB

Ethernet

PoE

K 1

1
2
3
4

B5

K 4

4
3
2
1

1 2 3

K 2

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