Thorne & Derrick HygroFlex HF7 Manuel utilisateur

E-M-HF7-V1_27

Rotronic AG

Bassersdorf, Switzerland

Document code

Unit

HygroFlex HF7 Humidity Temperature

Transmitters: User Guide

Instruction Manual

Document Type

Page

1of 27

Document title

HygroFlex HF7

Humidity Temperature Transmitters

User Guide

E-M-HF7-V1_27

Rotronic AG

Bassersdorf, Switzerland

Document code

Unit

HygroFlex HF7 Humidity Temperature

Transmitters: User Guide

Instruction Manual

Document Type

Page

2of 27

Document title

Table of contents

1Overview ..............................................................................................................................................3

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

3General description............................................................................................................................. 5

3.1 Power supply .................................................................................................................................... 5

3.2 Measured parameters ...................................................................................................................... 5

3.3 Calculated parameters .....................................................................................................................5

3.4 Analog output signals .......................................................................................................................6

3.5 Display option ...................................................................................................................................7

3.6 Service connector.............................................................................................................................7

3.7 Sensor protection (dust filter)............................................................................................................7

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

4.1 Function overview.............................................................................................................................8

4.2 Factory default settings ..................................................................................................................10

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

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

5.2 Enclosure installation (HF7 type N and W) ..................................................................................... 12

5.3 Probe installation (HF7 type N, D and A)........................................................................................ 12

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

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

6.2 Cable grip and cable specifications ................................................................................................ 14

6.3 Wiring and terminal block diagrams................................................................................................ 14

7Operation ........................................................................................................................................... 18

7.1 Minimum load requirements for the HF73 with voltage outputs...................................................... 18

7.2 HF72 and HF73 transmitters (analog outputs)................................................................................18

8Maintenance....................................................................................................................................... 19

8.1 Service cable .................................................................................................................................. 19

8.2 Location of the service connector (mini USB type) .........................................................................20

8.3 Periodic calibration check ............................................................................................................... 21

8.4 Cleaning or replacing the dust filter ................................................................................................ 21

8.5 Validation of the output signals transmission.................................................................................. 21

9Firmware updates.............................................................................................................................. 22

10 Technical data ................................................................................................................................... 23

10.1 Specifications ................................................................................................................................. 23

10.2 Dew point accuracy ........................................................................................................................ 25

11 Accessories ....................................................................................................................................... 26

12 Supporting documents ..................................................................................................................... 26

13 Document releases ........................................................................................................................... 27

E-M-HF7-V1_27

Rotronic AG

Bassersdorf, Switzerland

Document code

Unit

HygroFlex HF7 Humidity Temperature

Transmitters: User Guide

Instruction Manual

Document Type

Page

3of 27

Document title

Applicability:

This manual applies to all instruments of the HF7 series with firmware version 3.0 or higher. 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 HF7 transmitter series are designed for fixed installation in industrial applications. The HF7 measures

relative humidity and temperature and can be configured to calculate the dew or frost point. Depending on the

model, the HF7 can measure environments within the range of 0 to 100 %RH and -100 to 150C (-148 to 302F).

The electronics operating range is limited to -40…85 °C (-40…185 °F) and for units with display -10...60°C

(14...140 °F)

Two types of electronic circuits are available:

HF72: 2-wire, loop powered (4…20 mA current signal)

HF73: 3-wire (voltage or current signal).

Both circuit types provide linear analog outputs signals for transmission over a length of cable to a remote

display, recorder, controller or data processing unit and can be used to measure humidity only, temperature

only or both parameters.

The HF7 features well proven sensors and a robust housing. Digital signal processing ensures consistent

product performance and also facilitates the task of field maintenance with features such as potentiometer free

–digital calibration.

Based on the ROTRONIC AirChip 3000 digital technology the HF7 series offers the following functions:

User configurable settings

Calculation of the dew or frost point

Humidity temperature calibration and adjustment

Simulator mode

Automatic humidity sensor test and drift compensation

Fail safe mode

Data recording

The ability for the user to easily update the AirChip 3000 firmware means that instruments of the HF7 series

can be kept up-to-date regarding any future functionality improvement.

E-M-HF7-V1_27

Rotronic AG

Bassersdorf, Switzerland

Document code

Unit

HygroFlex HF7 Humidity Temperature

Transmitters: User Guide

Instruction Manual

Document Type

Page

4of 27

Document title

2 Mechanical configurations and dimensions

E-M-HF7-V1_27

Rotronic AG

Bassersdorf, Switzerland

Document code

Unit

HygroFlex HF7 Humidity Temperature

Transmitters: User Guide

Instruction Manual

Document Type

Page

5of 27

Document title

3 General description

3.1 Power supply

Depending on the circuit type, the HF7 requires the following power supply:

a) HF72 (2-wire, loop powered): 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 ohms.

For the maximum load of 500 , 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) HF73 (3-wire with analog outputs): 18 to 40 VDC (see note below) or 13 to 28 VAC. With both output circuits

closed, the maximum current consumption is 100 mA for DC powered devices and 250 mA for AC powered

devices.

Note: depending on the type of output signal, the HF73 will operate with the following minimum voltage

0…1 V outputs: 6 VDC or 5 VAC

0…5 V outputs: 10 VDC or 8 VAC

0…10 V outputs: 18 VDC or 13 VAC

0…20 mA or 4 …20 mA outputs: 6 VDC or 5 VAC with 0 load

18 VDC or 13 VAC with 500 load

3.2 Measured parameters

The HF7 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 HF7 can be configured by the user to calculate either the dew point

or the frost point.

E-M-HF7-V1_27

Rotronic AG

Bassersdorf, Switzerland

Document code

Unit

HygroFlex HF7 Humidity Temperature

Transmitters: User Guide

Instruction Manual

Document Type

Page

6of 27

Document title

3.4 Analog output signals

HF72 and HF73

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

Dew or frost point

Any output can also be disabled.

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.

The D/A converters used to generate the analog output signals feature a 16-bit resolution and exhibit a small

positive offset at the bottom of the signal range as indicated below:.

Signal type

Maximum offset at range bottom

0…1 V

10 mV

0…5 V

50 mV

0…10 V

100 mV

0…20 mA

0.2 mA

4…20 mA

No offset

HF73

The ROTRONIC HW4 software allows changing the type of output signal to one of the following: 0…20 mA,

4…20 mA, 0…1V, 0…5V or 0…10V. Both output signals are automatically configured with the same signal type.

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

In the case of voltage output signals, load requirements apply to the external device or circuit connected to the

HF73 transmitter. These requirements are defined in the “Operation” chapter

E-M-HF7-V1_27

Rotronic AG

Bassersdorf, Switzerland

Document code

Unit

HygroFlex HF7 Humidity Temperature

Transmitters: User Guide

Instruction Manual

Document Type

Page

7of 27

Document title

3.5 Display option

The upper line of the display corresponds to relative humidity or dew / frost point

and the bottom line corresponds to temperature.

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 see the

following HW4 manual: E-M-HW4v3-F2-007.

The display option for the HF73 has a backlight. The display option for the HF72 does not have a backlight.

3.6 Service connector

The service connector is a UART digital interface (Universal Asynchronous Receiver Transmitter) with a mini-

USB type connector. This allows connecting the HF7 either to a PC running the ROTRONIC HW4 software or

to a probe input of another instrument that is compatible with the HygroClip 2 (HC2) probes. In both cases a

service cable is required. See “Maintenance” for the location of the service connector and for the type of service

cable to be used.

Connecting the HF7 to a PC is used to configure the HF7, gain access to the HF7 functions such as humidity

and temperature adjustment, read data from the HF7 on the PC and update the AirChip 3000 firmware.

Connecting the HF7 to the probe input of another instrument is useful only when the other instrument has

its own display and keypad, and has an internal menu equivalent to the menu of the HP23 hand-held

calibrator. The connection allows showing the data measured by the HF7 on the other instrument display

and also allows using the other instrument internal menu to do for example a humidity and temperature

adjustment of the HF7.

3.7 Sensor protection (dust filter)

A dust filter is required to protect the sensors against dust particles and high air velocity. The probe of the HF7

is equipped with a with a metal filter base mod. NSP-ME. The filter cartridge must be ordered separately (see

Accessories 11.5). Filter cartridge mod. SP-M15 is suitable for most applications.

E-M-HF7-V1_27

Rotronic AG

Bassersdorf, Switzerland

Document code

Unit

HygroFlex HF7 Humidity Temperature

Transmitters: User Guide

Instruction Manual

Document Type

Page

8of 27

Document title

4 User configurable settings and functions

The HF7 ships configured as specified on the customer order. The analog outputs can be used just as with any

conventional humidity and temperature transmitter and most users will never need to use the HF7 configurable

settings and functions.

Making use of the HF7 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 HF7 functions and also

indicated the factory default settings.

4.1 Function overview

MEASUREMENT ACCURACY AND RELIABILITY

AirChip 3000 Functions

Description

►Humidity / temperature adjustment

o1-point or multi-point humidity calibration or adjustment

o1-point or 2-point temperature calibration or adjustment

oGenerate a time stamp for calibrations and adjustments

oRetain and view last adjustment date and adjustment

values

oGenerate calibration and adjustment protocols

►Automatic humidity sensor test

and optional drift compensation

Tests the humidity sensor for drift caused by contaminants

and 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)

►Data recording

The data recording function differs from a true data logging

function in the sense that the AirChip 3000 does not time

stamp the data. This data recording function can be used to

investigate events such as a sensor malfunction as well as to

retrieve data that would otherwise be lost

oStart or stop data recording - up to 2000 value pairs

(%RH and temperature). Starting a recording session

erases all previously recorded data

oThe recording mode and log interval can be specified

oWhen the device is powered off, the recording session is

paused but not ended As long as the recording session

has not been ended, the device automatically resumes

recording data when powered up again

oThe recorded data can be downloaded to a PC with the

HW4 software, time stamped and viewed

E-M-HF7-V1_27

Rotronic AG

Bassersdorf, Switzerland

Document code

Unit

HygroFlex HF7 Humidity Temperature

Transmitters: User Guide

Instruction Manual

Document Type

Page

9of 27

Document title

MEASUREMENT LOOP VALIDATION

AirChip 3000 Functions

Description

►Simulator mode

Used to make the HF7 generate fixed values for the

humidity, temperature and calculated parameter. Can be

configured, enabled or disabled

DEVICE SAFEGUARDS

AirChip 3000 Functions

Description

►Device write protection

Used to protect the HF7 with a password to prevent

unauthorized digital access by a digital user. Can be

configured, enabled or disabled

PROCESS PROTECTION / PROTECTION OF OTHER DEVICES

AirChip 3000 Functions

Description

►Limit humidity output to 100 %RH

Used to prevent the humidity signal from exceeding

100 %RH when condensation forms on the sensor. Can be

enabled or disabled

►Out-of-limit value alarm

Used to specify the normal range for humidity, temperature

and 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 seen on the optional display

►Bad sensor alarm

Built-in function. Cannot be disabled

A bad humidity or temperature sensor triggers a digital alarm

which can be also be seen on the optional display

►Fail safe mode

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

temperature in the event of a sensor failure. Can be

configured, enabled or disabled

E-M-HF7-V1_27

Rotronic AG

Bassersdorf, Switzerland

Document code

Unit

HygroFlex HF7 Humidity Temperature

Transmitters: User Guide

Instruction Manual

Document Type

Page

10 of 27

Document title

4.2 Factory default settings

Configuration of the HF7 by the user and access to its functions requires a PC with the ROTRONIC HW4

software (version 2.1.1 or higher) installed. Service cable AC3006 or AC3009 is used to connect the HF7 service

connector to a USB port of the PC (see Maintenance > Service Cable).

Configurable Settings

Applicability

Factory default

Unit system (Metric or English)

HF72, HF73

As per ordering code

Analog signal type (4…20 mA or other)

HF73

As per ordering code

Psychrometric calculation

HF72, HF73

As per ordering code

Output 1 parameter, scale and unit

HF72, HF73

As per ordering code (%RH or DP)

Output 2 parameter, scale and unit

HF72, HF73

Temperature, unit as per ordering

code

Functions

Applicability

Factory default

Humidity / temperature adjustment

HF72, HF73

Device write protection

HF72, HF73

Disabled

Menu access from keypad

HF72, HF73

Enabled

Limit humidity output to 100 %RH

HF72, HF73

Enabled

Out-of-limit value digital / display alarm

HF72, HF73

Disabled

Data recording

HF72, HF73

Enabled (loop mode –10 min.

interval)

Automatic humidity sensor test

HF72, HF73

Disabled

Humidity sensor drift compensation

HF72, HF73

Disabled

Fail safe mode

HF72, HF73

Disabled

Simulator mode

HF72, HF73

Disabled

For a detailed description of all AirChip 3000 / HF7 main functions see document E-T-AC3000-DF-V1

Instructions regarding the configuration of the HF7 and access to its functions are provided in the

following manuals:

E-M-HW4v3-Main

E-M-HW4v3-F2-007

E-M-HW4v3-DR-001

E-M-HW4v3-A2-001

The factory default setting for dew / frost point calculation is frost point below freezing

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