Rotronic HygroFlex HTS Owner's manual

IN-E-HyFlex-V4_10

Rotronic AG

Bassersdorf, Switzerland

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Instruction Manual

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HygroFlex transmitter version 4: instruction

manual

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HygroFlex

Humidity Temperature Transmitter

Instruction Manual

Version 4

IN-E-HyFlex-V4_10

Rotronic AG

Bassersdorf, Switzerland

Document code Unit

Instruction Manual

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HygroFlex transmitter version 4: instruction

manual

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Contents

1 Overview................................................................................................................................4

2 General description..............................................................................................................6

2.1 Power requirements............................................................................................................6

2.2 Probes and probe Inputs.....................................................................................................6

2.3 Analog outputs (HygroFlex 1 and 3) ...................................................................................8

2.4 Optional display and keypad...............................................................................................9

2.5 Serial interface (HygroFlex 2 and 3) .................................................................................10

2.6 Optional Ethernet (TCP/IP) interface (HygroFlex 2 and 3) ...............................................11

3 Optional configuration and communication software ....................................................12

4 How to configure the HygroFlex .......................................................................................12

4.1 Internal service connector (HygroFlex configuration) .......................................................13

4.2 Resolution of the analog signals (HygroFlex 3)................................................................13

4.3 Baud rate compatibility requirements ...............................................................................14

4.4 Ethernet local area network ..............................................................................................14

4.5 RS-485 multi-drop network (HygroFlex 2 and 3) ..............................................................15

4.6 Selection of the probe supply voltage (main PCB) ...........................................................16

4.7 Analog signal configuration (HygroFlex 1 and 3 main PCB) ............................................17

5 Mechanical installation.......................................................................................................18

5.1 Installation of the transmitter enclosure ............................................................................18

5.2 Front cover removal ..........................................................................................................19

5.3 Front cover installation......................................................................................................20

5.4 Re-attaching the ribbon cable (cover with optional display and keypad) .........................21

5.5 Probe installation guidelines .............................................................................................22

6 Electrical installation..........................................................................................................23

6.1 Main PCB connectors .......................................................................................................23

6.2 Optional Ethernet module (HygroFlex 2 and 3) ................................................................24

6.3 Mains fuse.........................................................................................................................24

6.4 PCB number......................................................................................................................25

6.5 Connector plate.................................................................................................................25

6.6 Connector plate connectors - pin-out diagrams................................................................27

6.7 Electrical diagrams (analog outputs) ................................................................................28

6.8 Cable grips........................................................................................................................30

6.9 Grommet for the Ethernet cable (HygroFlex 2 and 3 option)............................................30

6.10 Grounding .........................................................................................................................31

6.11 RS-485 multi-drop network (HygroFlex 2 and 3) ..............................................................31

7 HygroFlex function menu...................................................................................................32

7.1 CALCULATE (HygroFlex 2 and 3)....................................................................................33

7.2 DISPLAY ...........................................................................................................................34

7.3 ADJUST M.PT...................................................................................................................34

7.4 ADJUST 1PT.....................................................................................................................36

7.5 ADJUST REF....................................................................................................................37

7.6 PROBE..............................................................................................................................38

7.7 SETTINGS ........................................................................................................................38

7.8 SYS Status........................................................................................................................39

7.9 OUTPUT ...........................................................................................................................39

8 Error and status messages................................................................................................39

9 Test connector for the HygroPalm indicator....................................................................40

9.1 Display the Probe Measurements.....................................................................................41

9.2 Functions (except ADJUST M.PT and ADJUST 1PT)......................................................41

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9.3 Functions ADJUST M.PT and ADJUST 1PT ....................................................................41

9.4 Function ADJUST REF .....................................................................................................42

10 Environmental limits...........................................................................................................42

11 Maintenance ........................................................................................................................43

11.1 On-site maintenance.........................................................................................................43

11.2 Factory / metrology lab. maintenance...............................................................................43

11.3 Maintenance of the ROTRONIC probes...........................................................................43

12 Specifications......................................................................................................................45

13 Probe calibration basics ....................................................................................................47

13.1 Temperature calibration....................................................................................................47

13.2 Humidity calibration...........................................................................................................48

14 Humidity Definitions...........................................................................................................49

15 Dew point accuracy............................................................................................................52

16 ASCII communications protocol .......................................................................................53

17 Metal enclosure option.......................................................................................................56

18 Accessories for the HygroFlex..........................................................................................57

19 Electrical Installation Guidelines ......................................................................................58

20 Document releases.............................................................................................................60

About the version number:

This manual is valid for all instruments with firmware version 4.x, where 4.x can be 4.0, 4.1, etc.

(see Function Menu, SYS STATUS). 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.

Note: Both instrument configuration and adjustment of the HygroClip probes require a PC with the

optional ROTRONIC HW4 software version 1.2.2 or higher. Instructions for using the software are

not included in this manual. These instructions are shipped separately on the software CD ROM.

IN-E-HyFlex-V4_10

Rotronic AG

Bassersdorf, Switzerland

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1 Overview

The HygroFlex are 3-wire humidity temperature transmitters available with a wide variety of probes

for use in many different industrial and scientific applications. The HygroFlex series uses a micro-

processor based design to achieve unparalleled accuracy, reliability and versatility.

The HygroFlex is available in 3 different models:

HygroFlex 1: Basic industrial transmitter with analog outputs

Relative humidity and temperature

- Compatible with any ROTRONIC HygroClip digital probe

1)

- Relative humidity and temperature analog outputs

- Test connector for communication with the HygroPalm indicator

2)

- Software-based calibration (HygroClip probes only)

- Internal service connector (RS232) for configuration with PC (unit system, output range)

- Two linear analog outputs, signal type (mA, V) configurable by means of jumpers

3)

- Optional LC display and keypad

4)

1) ROTRONIC analog probes are also accepted with some restrictions

2) Allows the HygroPalm to read the transmitter or to calibrate a digital probe

3) 0..1V, 0..5V, 0..10V, 0..20 mA, 4..20 mA

4) Allows direct calibration of digital probes by the transmitter and direct access to other functions

HygroFlex 2: Networkable industrial transmitter with digital outputs

Relative humidity, dew point (or other) and temperature

- Compatible with any ROTRONIC HygroClip digital probe

1)

- Optional analog input for second probe

2)

- Relative humidity, temperature, dew point, wet bulb, mixing ratio, enthalpy, etc

3)

- Test connector for communication with the HygroPalm indicator

4)

- Software-based calibration (HygroClip probes only)

- RS232 and RS485 serial ports or Ethernet (TCP/IP) and RS-485 ports

5)

- Optional LC display and keypad

6)

1) ROTRONIC analog probes are also accepted with some restrictions

2) Pressure probe or ROTRONIC HygroClip digital probe – some restrictions apply

3) Uses either a fixed barometric pressure value or the measurements from an analog pressure probe

for those parameters that require pressure as a computational input. The fixed pressure value can be

changed with the optional HW4 software.

4) Allows the HygroPalm to read the transmitter or to calibrate a digital probe

5) The optional HW4 software offers a reliable networking solution and the possibility of exporting live

data to practically any OPC client applications.

6) Allows direct calibration of digital probes by the transmitter and direct access to other functions

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HygroFlex 3: Networkable industrial transmitter with digital and analog outputs

Relative humidity, dew point (or other) and temperature

- Compatible with any ROTRONIC HygroClip digital probe

1)

- Optional input for second probe

2)

- Relative humidity, temperature, dew point, wet bulb, mixing ratio, enthalpy, etc

3)

- Test connector for communication with the HygroPalm indicator

4)

- Software-based calibration (HygroClip probes only)

- RS232 and RS485 serial ports or Ethernet (TCP/IP) and RS-485 ports

5)

- Three linear analog outputs, signal type (mA, V) configurable by means of jumpers

6)

- Optional LC display and keypad

7)

1) ROTRONIC analog probes are also accepted with some restrictions

2) Pressure probe or ROTRONIC HygroClip digital probe – some restrictions apply

3) Uses either a fixed barometric pressure value or the measurements from an analog pressure probe

for those parameters that require pressure as a computational input. The fixed pressure value can be

changed with the optional HW4 software.

4) Allows the HygroPalm to read the transmitter or to calibrate a digital probe. IMPORTANT: there is no

test connector on the HygroFlex 3 when it is equipped with the optional Ethernet (TCP/IP) port.

5) The optional HW4 software offers a reliable networking solution and the possibility of exporting live

data to practically any OPC client applications

6) 0..1V, 0..5V, 0..10V, 0..20 mA, 4..20 mA - corresponding to relative humidity, temperature and

computed parameter (or relative humidity of second probe)

7) Allows direct calibration of digital probes by the transmitter and direct access to other functions

HygroFlex 1 HygroFlex 2 HygroFlex 3

IN-E-HyFlex-V4_10

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2 General description

2.1 Power requirements

The HygroFlex is available with a choice of two basic internal power modules:

- Standard power module for operation with 12 to 35 VDC (maximum 300 mA) or with 12 to 24 VAC.

- Optional power module for operation with voltages within the range of 90 to 264 VAC (50/60 Hz).

Starting with PCB number 66.0738.0502 all models are equipped with a SMD power fuse

(250 VAC 1 A) – see page 19.

2.2 Probes and probe Inputs

Model HygroFlex 1 HygroFlex 2 HygroFlex 3

number of probe inputs 1 1 (standard) or 2 (optional)

probe types (see below) ROTRONIC Digital

ROTRONIC Analog

ROTRONIC Digital

ROTRONIC Analog

Third-Party Analog

number of digital input channels 1 1 (input 1) + 1 (input 2 - optional)

number of analog input channels 2 2 (input 1) + 1 (input 2 - optional)

analog input A/D resolution 10-bit 10-bit

Unless otherwise specified when ordering, all probe inputs are factory programmed to accept a HygroClip

digital probe and the voltage powering the probe is set to 5 VDC.

Prior to using any analog probe, the corresponding input should be re-programmed. This can be done with the

HW4 software after connecting the internal service connector to a PC COM port (see separate software

manual).

IMPORTANT: HygroClip EX probes require 15 VDC power supply. These probes, as well as any third party

analog probe requiring a supply voltage of more than 5 VDC, can be supplied with 15 VDC by moving the

jumper B20 to B19 – see page 12: selection of the probe supply voltage.

A matching adapter cable is required to connect analog probes.

2.2.1 HygroClip digital probes

The HygroFlex is primarily designed for use with the ROTRONIC HygroClip digital humidity

temperature probes. These probes permit to take full advantage of all the features and functions of

the HygroFlex such as the software based calibration.

The ROTRONIC HygroClip digital probes are highly accurate and are calibrated entirely by means

of software (no adjustment potentiometers). Because calibration and other data are stored in the

probe non-volatile memory, the probes are fully interchangeable. When a probe requires calibration

or has to be repaired, it can be replaced with another probe in a few seconds. The ROTRONIC

HygroClip digital probes are available in different configurations so as to meet the requirements of

each application:

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Bassersdorf, Switzerland

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HygroClip IW

for surface mount (area monitoring)

max. 85°C (185°F) – wire mesh filter

observe temperature limits of transmitter

electronics

HygroClip IC-1 (100mm) / IC-3 (250mm)

for through-wall installation

max. 200°C (392°F) - wire mesh filter

HygroClip IM-1 (120mm) / IM-3 (270mm)

for through-wall installation in high humidity

applications

max. 200°C (392°F) - wire mesh filter

HygroClip IE-1 (G ½”) / IE-2 (NPT ½”)

for compressed air (max. 50 bar / 725 PSI)

max. 85°C (185°F) – sintered steel filter

to avoid errors, temperature should be the

same on both sides of the mounting wall

HygroClip IC-05

for measurement in tight spaces

max. 100°C (212°F)

HygroClip ID-EX-xxx (intrinsically safe)

for through-wall installation

xxx = 002 to 100

from 2 to 100 m cable length (about 6.5ft to 328ft)

max. temperature at sensors: 200°C (392°F)

probe length 250 mm - sintered steel filter

HygroClip IW-EX-xxx (intrinsically safe)

for surface mount (area monitoring)

xxx = 002 to 100

from 2 to 100 m cable length (about 6.5ft to 328ft)

max. temperature 40°C (104°F)

probe length 150mm

sintered steel filter

Probe Extension Cable AC1616/xxx

with built-in signal booster

xxx = 002 to 200

from 2 to 200 m (about 6.5ft to 656ft)

max. temperature 85°C (185°F)

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ZB1 Zenner Barrier for ID-EX and IW-EX

AC1617xxx Connecting Cable for ZB1

with built-in signal booster

xxx = 002 to 100

2 to 100m

(

about 6.5ft to 328ft

)

2.2.2 Analog probes

Depending on the model and options, the HygroFlex transmitters can be used with one or two

analog probes. Both the scale and unit of the analog input signals can be defined by software. For

example, an analog pressure probe may used to provide the local value of barometric pressure for

the computation of parameters such as the wet bulb temperature, mixing ratio or enthalpy.

Use of analog probes is subject to the following restrictions and limitations:

a) ROTRONIC analog humidity-temperature probes with the standard temperature output signal of

– 0.5…2.0 V = -50…200°C: because the HygroFlex cannot read a negative voltage signal,

temperature measurement is generally limited to values above freezing.

b) Third-party analog probes: single channel probes (one signal), output signal within the range of

0 to 2.5 VDC, supply voltage: 15 VDC or less, maximum current consumption: 10 mA. (see

page 16 – selection of the probe supply voltage).

c) Resolution is limited by the 10-bit A/D converter used for the analog inputs. This converter

provides a theoretical maximum of 1024 counts for an input voltage span of 2.5 VDC. In theory,

this gives a resolution of 2.5 / 1024 = 0.00244 V. In practice, it is not possible to get 100% of the

counts from an A/D converter and the actual resolution should be about 0.0027 V (typical). For

example, if a probe with a temperature signal of 0..1 V = 0…100°C is being used, the signal

resolution will be about 100 x 1 x 0.0027 = 0.27°C

2.3 Analog outputs (HygroFlex 1 and 3)

Model HygroFlex 1 HygroFlex 3

analog outputs

- relative humidity

- temperature

Any three of:

- relative humidity

- temperature

- computed parameter

- user defined calculation see note

1)

below

IN-E-HyFlex-V4_10

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Model HygroFlex 1 HygroFlex 3

output signals

2)

configurable with

jumpers

0…1 V

0…5 V

0…10 V

0…20 mA

4…20 mA

0…1 V

0…5 V

0…10 V

0…20 mA

4…20 mA

D/A output

resolution

humidity: 12-bit

temperature: 16-bit

Out 1: 12-bit

Out 2: 16-bit

Out 3: 12-bit

options

floating analog current outputs

(galvanic separation)

floating analog current outputs

16-bit D/A resolution for Out1 allows

0.1 resolution with a span of more

than 200 units.

1)

Any of the 3 analog outputs of the HygroFlex 3 can be set to correspond to humidity [probe

1 or 2] or temperature [probe 1 or 2] or calculated parameter [probe 1 or 2] or user defined

calculation or optional analog probe signal (such as pressure). The HygroFlex is set at the

factory as specified when ordering. These settings can be changed at any time with the

optional HW4 software.

2)

The output signals are set at the factory according to the type and range specified when ordering. A

label located on the transmitter housing shows the type of output signal for each unit.

The analog output signals are linear and are consistent with the requirements of most data/signal

processing instrumentation (panel meter, controller, computer card, etc.).

2.4 Optional display and keypad

The LC display shows which probe input is being displayed (small indicator on top of the display)

and up to 2 parameters measured by the probe, with the associated engineering unit. When

relevant, the message line provides additional information.



Humidity and Temperature

Calculated Value and Temperature

Calculated Value and Humidity

Engineering

Units

8.8:8.8

S S

Parameter or

Trend Indicators

Message Line

Probe Input Indicator

(1-2) from left to right

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Keypad

UP / DOWN: Press one of these keys to select the probe input

for the display and functions. When the function menu is active,

use these keys to navigate the menu, make a selection or to

change a number on the display.

ENTER: When the menu is active, press

this key to confirm a selection.

To prevent unauthorized or accidental changes, access from

the keypad to the calibration functions can be blocked out

when configuring the HygroFlex with the HW4 software. This

also prevents access to the calibration functions with the

HygroPalm calibrator.

MENU : Press this key to activate the function menu. The different

menu items appear on the LCD message line. Press this key again

to exit the menu

2.5 Serial interface (HygroFlex 2 and 3)

Both the HygroFlex 2 and 3 have an external receptacle (located on the connector plate) that

provides both a RS-232 and a RS-485 interface. A special connector matching this receptacle is

shipped with the HygroFlex.

Serial interface settings

The HygroFlex transmitter is compatible with the ROTRONIC HW4 software (version 1.2.2 or

higher) and backward compatible with the ROTRONIC HW3 software. Each software uses a

different communications protocol and different settings regarding the parity, number of data bits

and number of stop bits. When interrogated, the HygroFlex automatically recognizes which

software and which protocol is being used. This allows using the HygroFlex with either HW3 or

HW4 without requiring a manual configuration of the HygroFlex serial settings.

When used with HW4, the HygroFlex automatically sets its serial interface as follows:

Parity : none

Data bits : 8

Stop bits : 1

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When used with HW3, the HygroFlex automatically sets its serial interface as follows:

Parity : even

Data bits : 7

Stop bits : 1

Note: the HygroFlex will automatically set its serial interface to the above settings when

interrogated by a third-party software that uses the same ASCII commands as HW3 to request

data. On models with the optional Ethernet interface, the internal module must be re-configured as

indicated in document IN-E-TCPIP-Conf_10.doc (also available in PDF format).

IMPORTANT: The HygroFlex can be configured by the user with a Baud rate of 57600. The factory

default Baud rate of 19200 is compatible with both HW3 and HW4. The Baud rate of 57600 is

compatible only with HW4.

RS-232 interface

This interface is used to read measurement data, adjust any HygroClip probe connected to the

HygroFlex and to configure the HygroFlex. The RS-232 allows direct connection of the HygroFlex

to the COM port of a PC (up to 150 m / 490 ft separation)

The HW4 software (version 1.2.2 or higher) should be installed on the PC.

RS-485 interface

This interface is used to connect together a number of HygroFlex transmitters (as well as other

ROTRONIC devices) so as to form a RS-485 multi-drop. This is useful when the number of PC

ports is limited and provides savings on cabling costs. The RS-485 interface has the same

functionality as the RS-232 interface (measurement data, adjustment of HygroClip probes and

device configuration).

In a RS-485 multi-drop, the master is automatically the device that is connected to a COM port,

USB port or network port (Ethernet) of the PC. Any ROTRONIC device that is equipped with both a

RS-232, USB or Ethernet interface and a RS-485 interface can be used as the master. The other

devices in the RS-485 multi-drop are slaves. Any HygroFlex 2 or HygroFlex 3 transmitter can be

used either as a slave or a master, without special configuration other than giving a unique RS-485

address to each device and setting each device to use the same Baud rate.

2.6 Optional Ethernet (TCP/IP) interface (HygroFlex 2 and 3)

As an option, both the HygroFlex 2 and HygroFlex 3 can be ordered with the combination of an

Ethernet (TCP/IP) interface and a RS-485 serial interface. The HW4 software accepts connection

to the PC by means of an Ethernet network.

Note: when equipped with this option, the HygroFlex 3 does not have a Test connector.

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3 Optional configuration and communication software

Depending on the model of HygroFlex, the ROTRONIC HW4 software (version 1.2.2 or higher)

offers additional functionality such as:

- Networking (unlimited number of masters, up to 64 units per multi-drop)

- Instrument configuration (unit system, etc.)

- Adjustment of the ROTRONIC HygroClip digital probes

- Data logging to a PC disk file

- Graphic functions (both on and off-line)

- Alarm functions (on-screen display, reports, notification by e-mail, etc.)

See also Accessories for the HygroFlex – HCA (HygroClip Alarm)

HW4 is compatible with Windows XP, NT4 with SP6a or higher. For more details see separate

instruction manual provided with the software.

The HygroFlex is backward compatible with the ROTRONIC HW3 software (Windows 98 or NT)

4 How to configure the HygroFlex

The HygroFlex is configured by the factory as specified when the instrument was ordered. The

configuration can be modified by the user and this requires connecting the HygroFlex to a PC with

the ROTRONIC HW4 software installed (version 1.2.2 or higher).

Depending on the model of HygroFlex, the following can be configured by the user with Device

Manager in HW4 (where relevant, the factory default is indicated in bold):

- Device name

- RS-485 address [0]

- Device write protection with password [disabled]

- Fixed barometric pressure value used in some psychrometric calculations [1013.25 hPa]

- Dew or frost point calculation below freezing [frost point]

- Language and unit system

- Probe input type (HygroClip probe, analog pressure probe, other analog probe)

- Input name

- Calculated parameter (HygroClip probe only)

- Barometric pressure (fixed value or read from an input) [fixed]

- Alarm threshold (low and high) for humidity, temperature, calculated parameter or other.

See also Appendix 9 – Accessories for the HygroFlex – HCA (HygroClip Alarm).

- Parameter or custom calculation associated with each analog output and output scale

- Custom calculation (example: difference between two parameters such as dew point)

- Optional display configuration (resolution, trend indicators, parameters to be displayed)

- Keypad: restricted menu access [not restricted]

- Baud rate (serial interface) [19200]

For more details see separate instruction manual provided with the software.

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4.1 Internal service connector (HygroFlex configuration)

All HygroFlex models have an internal RS-232 service connector (MTA) located on the main PCB

(see PCB connections). Cable AC1623 is required to connect the HygroFlex MTA connector to

COM port of a PC.

Use of the MTA service connector is limited to configuring the instrument (unit system, output

range, display, etc.). Both the HygroFlex 2 and HygroFlex 3 can also be configured via one of the

external digital ports.

Instrument configuration requires a PC with the HW4 software installed. Instructions for configuring

the HygroFlex are provided in the software manual.

4.2 Resolution of the analog signals (HygroFlex 3)

The HW4 software allows defining the range of the analog output signals of the HygroFlex 3. When

selecting a range, it is important to consider the fact that the resolution of the analog output signal

depends on the span of the selected range.

The HygroFlex 3 uses two 12-bit D/A converters to generate the analog output signals for relative

humidity (output #1) and for the computed parameter (output #3). In theory, a 12-bit D/A converter

can distinguish between 4,096 values (or counts). This number of counts, together with the span of

the signal (%RH, °C, etc.), determines the resolution of the analog output signal.

Because of the tolerance in the analog components associated with the D/A converter, the number

of counts that are effectively used tends to be less than the theoretical maximum. Typically, only

about 90% of the counts (3,680) may be effectively used.

In addition, the analog output signal may be a partial range. For example, 4…20 mA is a partial

range of 0…20 mA. With a 4…20 mA output signal, the number of useful D/A counts is further

reduced by 20% (1 - 16/20) and only 72% of the count (2,950 counts) may be effectively available.

Taking the example of a 4…20 mA output, the span of the analog signal should not exceed 140 to

150 units (for example –50 to 100°C dew point) to maintain a resolution of 0.1 unit. With analog

signal such as 0…5V or 0…20 mA, a maximum span of 180 units could be used.

The above examples are based on a resolution of 0.05 units as this prevents the analog output

signal from bouncing around by ± 0.1 units.

For the temperature analog output signal, the HygroFlex 3 uses a 16-bit D/A converter. This is

more than sufficient to offer 0.1 resolution for any temperature range and any type of analog signal

available with the HygroFlex 3.

Note: an optional 16-bit D/A converter is available for analog output 1. In that case the computed

parameter is assigned to output 1 and relative humidity to output 3.

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4.3 Baud rate compatibility requirements

Depending on the model, devices from ROTRONIC use one of the following Baud rates as the

factory default:

• 57600 bps: HygroLog NT data logger and docking stations

• 19200 bps: HygroPalm and HygroLab indicators, HygroFlex and M33 transmitters, HygroClip

Alarm programmable alarm card, HygroClip DI interface, HygroStat MB Thermo-Hygrostat

The factory default Baud rate of the HygroFlex is compatible both with both the ROTRONIC HW4

and HW3 software and is the recommended Baud rate for the HygroFlex.

IMPORTANT:

• All devices connected to a RS-485 multi-drop network (master and slaves) must use the

same Baud rate

• Models with the optional Ethernet (TCP/IP) interface: after using HW4 – Device Manager to

change the Baud rate, you should also change the configuration of the internal Ethernet

module to the new Baud rate (see separate HW4 manual).

Devices and internal Ethernet modules with mismatched Baud rate will not communicate together.

• The Baud rate configuration of a ROTRONIC device can be changed with the Device

Manager function (Digital Interface tab) available from within the HW4 software.

• The Baud rate of a Digi Module can be changed only from the module web interface. See

separate document IN-E-TCPIP-Conf_10.doc (also available in PDF format).

4.4 Ethernet local area network

ROTRONIC devices with an Ethernet (TCP/IP) interface presently use an internal module

manufactured by Digi International (Digi Connect ME for a wired connection, Digi Connect WI-ME

for a wireless connection). Both types of module feature a web interface that is used to configure

the module.

IMPORTANT: The TCP/IP settings of models with an Ethernet (TCP/IP) interface should be

configured to be compatible with the local area network. Detailed instructions are provided

separately in document IN-E-TCPIP-Conf_10.doc (also available in PDF format).

Models with an Ethernet (TCP/IP) interface are shipped with a Device Configuration Certificate that

provides information about the factory configuration settings of both the Ethernet module and

device. See example below:

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Setting Value

DHCP or Static Address Static

IP Address 192.168.1.1

Subnet Mask 255.255.255.0

Default Gateway 192.168.1.0

TCP Port 2101

MAC Address 00:40:9D:28:2D:2A

Firmware Release (device) 1.4

User Name (web interface) rotronic

Password (web interface) wlan

Serial Port Configuration Profile TCP Sockets

Basic Serial Settings

Baud Rate 57600

Data Bits 8

Parity None

Stop Bits 1

Flow Control None

4.5 RS-485 multi-drop network (HygroFlex 2 and 3)

Both the HygroFlex 2 and HygroFlex 3 feature a RS-485 connector. When the number of available

PC ports is limited, this connector can be used to connect together up to 64 HygroFlex (or other

devices) in a multi-dropped arrangement. In principle, an unlimited number of such networks can

be monitored with the HW4 software, but each RS-485 multi-drop network is limited to 64 devices.

The HygroFlex can be used either as a slave or a master, without special configuration. The master

is automatically the device that is directly connected to the PC or LAN by means of a RS-232 port

or TCP/IP port.

RS-485 Address: the RS-485 address is used to identify the individual devices that are connected

to a RS-485 multi-drop and must be unique to each device. This address is part of the HygroFlex

communications protocol. The factory default for the RS-485 address is 00. In general, this address

should not be changed manually (see note below). As far as HW4 is concerned, all masters can

share the same RS-485 address. When the HW4 command “Search for RS-485 slaves” is being

used, HW4 automatically changes from 00 to 01 the RS-485 address of any master that has slaves

attached. As a result, all masters end up with the same RS-485 network address (01). In addition,

HW4 automatically changes the RS-485 address of the slaves in each multi-drop from 00 (factory

default) to a unique address ranging from 02 to 64. The same address range (02 to 64) is used

again when there is more than one multi-drop RS485 network.

Notes:

- We recommend using HW4 to give each HygroFlex a unique name for easier identification.

- In the situation where an RS-485 network is to be monitored by software other than HW4, you

will have to use HW4 to give each device a unique RS-485 address prior to connecting to the

network.

- If you change an instrument from master to slave, be sure to change the RS address of the

instrument to 00 before establishing the RS-485 connection. Not doing so may prevent HW4

from detecting the instrument. After detecting the instrument, HW4 will automatically change

the RS address to 02 or higher. Please note that HW4 may eventually change the address of

any master with address 00.

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- All devices within a multi-drop should use the same Baud rate. See Baud rate compatibility

requirements.

- Models with Ethernet (TCP/IP) interface: please note that the Baud rate of the HygroFlex and

the Baud rate of the internal Ethernet module should be set to the same value.

4.6 Selection of the probe supply voltage (main PCB)

Starting with PCB number 66.0738.0602, the default

factory setting for the probe supply voltage is 5 VDC.

IMPORTANT: HygroClip EX probes require 15 VDC

power supply. A third party analog probe may also

require a supply voltage of more than 5 VDC (HygroFlex

2 and HygroFlex 3). Moving jumper B20 to B19 supplies

all probes with 15 VDC

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Bassersdorf, Switzerland

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4.7 Analog signal configuration (HygroFlex 1 and 3 main PCB)

On the HygroFlex 1 and HygroFlex 3, the type of analog output signal can be selected by means

of jumpers on the PCB:

HygroFlex 1: to configure the temperature range

and unit, use this 3-pin service connector and

connect to a PC with cable # AC1623.

HygroFlex 3: the transmitter can be configured

by connecting the RS232 / RS485 output to a

PC.

For both transmitters, configuration requires the

HW4 software installed on the PC.

RS232 / RS485

B31

B32

B33

Res.

B34

Signal Jumpers to be closed

0…1 V B2, B3, B12, B13, B22, B23, B31

0…5 V B2, B4, B12, B14, B22, B24, B32

0…10 V B2, B5, B12, B15, B22, B25, B31, B32

0…20mA B1, B3, B11, B13, B21, B23, B33, B34

4…20mA B1, B3, B11, B13, B21, B23, B31, B33, B34

The scale of each analog output can be changed with the HW4 software (see separate

instructions). On the HygroFlex 3, the parameter corresponding to the third output can also be

changed by software (see software instructions).

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Rotronic AG

Bassersdorf, Switzerland

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5 Mechanical installation

Each HygroFlex transmitter is shipped in an individual box, separately from the probe. The shipping

box has a label with the following information: instrument type, main specifications and serial

number. An identical label is located inside of the transmitter enclosure.

5.1 Installation of the transmitter enclosure

Note: see appendix 8 for the optional metal enclosure

The HygroFlex is comprised of 5 parts: mounting bracket (1), electronics housing (2), main circuit

board (3), connector plate (4) and front cover with or without optional display and keypad (5).

V-shaped

slot

2

3

5

4

1

After unpacking the

HygroFlex, separate the

mounting bracket from the

back of the housing.

To attach the transmitter to a mounting surface:

1) Attach the wall plate in the position shown above to an appropriate surface using 4 screws.

2) Slide the electronics housing down on the wall plate to the mechanical stop

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5.2 Front cover removal

The front cover is held in place by 4 small tabs molded into the electronics housing. To remove the

cover, insert a screwdriver in the V-shaped slot on top of cover and press lightly to unlock prior to

pulling the cover away from the electronics housing.

Note: If the cover has the optional display and keypad, it is connected to the main circuit board by

a ribbon cable. When removing the front cover, this cable can easily become detached. This is

nothing to worry about since the cable can be just as easily re-attached.

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Bassersdorf, Switzerland

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5.3 Front cover installation

To put the front cover back on the HygroFlex, proceed as shown below:

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