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HF62
User Manual
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ROTRONIC HF62 User Manual

E-M-HF62-V1_11
Document code Unit
Rotronic AG Bassersdorf, Switzerland
HygroFlex HF62 Humidity Temperature Transmitters: User Guide
HygroFlex HF62
Humidity Temperature Transmitters
User Guide
Instruction Manual
Document Type
Page
1 of 27
© 2008; Rotronic AG E-M-HF62-V1_11
E-M-HF62-V1_11
Document code Unit
Rotronic AG Bassersdorf, Switzerland
HygroFlex HF62 Humidity Temperature Transmitters: User Guide
Table of contents
1 ..............................................................................................................................................3Overview
2
..................................................................................................................................................4Models
2.1
.................................................................................................................................4Ordering codes
2.2
......................................................................................6Mechanical configurations and dimensions
...............................................................................................................6Display and keypad option
2.3
.............................................................................................................................7General description
3
3.1
....................................................................................................................................7Power supply
3.2
..................................................................................7Measuring circuits and measured parameters
.....................................................................................................................7Calculated parameters
3.3
.......................................................................................................................7Analog output signals
3.4
3.5
...........................................................................................................................8Service connectors
............................................................................................................8Sensor protection (dust filter)
3.6
3.7
.............................................................................................................................8Direct RTD option
4 .........................................................................................8User configurable settings and functions
4.1 ............................................................................................................................. 9Function overview
.................................................................................................................. 10Factory default settings
4.2
.....................................................................................................................11Mechanical installation
5
5.1
.......................................................................................................................... 11General guidelines
5.2
.............................................................................................................................. 11HF62 enclosure
........................................................................................... 12Installation of the enclosure and probe
5.3
........................................................................................................................13Electrical installation
6
6.1
............................................................................................................... 13General wiring guidelines
6.2
................................................................................................ 14Cable grip and cable specifications
.............................................................................................................................................14Wiring
6.3
...........................................................................................................................................16Operation
7
7.1
.................................................................................. 16Internal menu (optional keypad and display)
7.2
..................................................................... 17Displayed parameters (optional keypad and display)
8 ......................................................................................................................................17Maintenance
8.1 ..................................................................................................................................17Service cable
........................................................................... 18Location of circuit 1 (humidity) service connector
8.2
8.3
............................................................................................................... 18Periodic calibration check
................................................................................................ 19Cleaning or replacing the dust filter
8.4
..............................................................................................................................20Firmware updates
9
...................................................................................................................................21Technical data
10
10.1 .................................................................................................................................21Specifications
........................................................................................................................ 23Dew point accuracy
10.2
.......................................................................................................................................24Accessories
11
11.1
.................................................................................... 24Configuration and communication software
11.2
................................................................................................................................24Service cables
......................................................................................................................... 25Mounting hardware
11.3
11.4
.................................................................................................................. 25Calibration accessories
................................................................................................... 26Dust filters for wall mount models
11.5
11.6
................................................................ 26Dust filter parts for duct mount and cable probe models
.....................................................................................................................27Supporting documents
12
...........................................................................................................................27Document releases
13
Instruction Manual
Page
2 of 27
Document Type
© 2008; Rotronic AG E-M-HF62-V1_11
E-M-HF62-V1_11
Document code Unit
Rotronic AG Bassersdorf, Switzerland
HygroFlex HF62 Humidity Temperature Transmitters: User Guide
Instruction Manual
Page
3 of 27
Document Type
Applicability:
This manual applies to all instruments of the HF62 series with firmware version 1.x, where 1.x can be 1.0, 1.1, 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 HF62 series are 2-wire transmitters designed for fixed installation in industrial applications. The HF62 features two fully independent 2-wire, loop powered measuring circuits placed in a single enclosure (2 x 4…20 mA current signal). One of the circuits corresponds to relative humidity or to the dew or frost point. The other circuit corresponds to temperature. As an option, the HF62 is available with a 4-wire Pt 100 RTD directly connected to a terminal block. In this case, the electronics of the HF62 consist of just one circuit corresponding to humidity.
Depending on the model, the HF62 can measure environments within the range of 0 to 100 %RH and -100 to 150C (-148 to 302F). The electronics operating range is limited to -40…60 °C (-10…60°C with the optional LC display).
The HF62 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 HF6 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 Sensor failure mode Data recording
The ability for the user to easily update the AirChip 3000 firmware means that the HF62 transmitter can be kept up-to-date regarding any future functionality improvement.
© 2008; Rotronic AG E-M-HF62-V1_11
E-M-HF62-V1_11
Document code Unit
Rotronic AG Bassersdorf, Switzerland
HygroFlex HF62 Humidity Temperature Transmitters: User Guide
Instruction Manual
Page
4 of 27
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2 Models

2.1 Ordering codes

Transmitters with analog output signals: HF62 (2 x 2 wire)
1 2 3 4 5 6 7 8 Circuit type, supply voltage and output signal type
HF624- 2 x 2-wire (loop powered), 10 to 28 VDC, 4…20 mA
Installation type / Mechanical configuration 2 Probe separated by 2 m cable, 15 x 100 mm D Duct mount (through wall), probe 15 x 208 mm
W Wall mount, probe 15 x 85 mm
Parameters (analog outputs)
P X X Humidity (0...100 %RH) + direct 4-wire Pt100 RTD
B Humidity (0...100 %RH) and Temperature (see range below)
H X X Humidity only (0...100 %RH)
T Temperature only (see range below)
1 X X Humidity & Dew / Frost point (see range below)
A Dew / Frost point and Temperature (see range below)
Standard temperature output ranges 1 X 0…50 °C 2 X 10…40 °C 3 X -40…60 °C 4 X -30…70 °C 5 X -40…85 °C 6 X 0…100 °F 7 X 0…200 °F 8 X 0…300 °F
1 2 3 4 5 6 7 8 Standard temperature output ranges 9 X -50…200 °F S T Custom range. Specify when ordering P P 3 Pt 100 1/3 class B, 4-wire direct connection P P 5 Pt 100 1/5 class B, 4-wire direct connection P P A Pt 100 1/10 class B, 4-wire direct connection
© 2008; Rotronic AG E-M-HF62-V1_11
E-M-HF62-V1_11
Document code Unit
Rotronic AG Bassersdorf, Switzerland
HygroFlex HF62 Humidity Temperature Transmitters: User Guide
Instruction Manual
Page
5 of 27
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1 2 3 4 5 6 7 8 Optional keypad and display D Keypad and display (no backlight) X No keypad and display
Probe length options (except wall mount configuration)
S Standard length 1 Standard length + 150 mm 2 Standard length + 300 mm
3 Standard length + 450 mm 4 Standard length +600 mm
Cable fittings
1 1x M16 cable grip
3 1x ½” conduit adapter
Standard dew / frost point output ranges
X X No calculated parameter B X -50…50 (°C / °F - as per temperature output range) C X -50…100 (°C / °F - as per temperature output range) D X -50…200 (°C / °F - as per temperature output range) S C Custom range. Specify when ordering
Notes:
o Output 1: relative humidity or dew point o Output 2: temperature o The enclosure of all HF62 models is designed to be installed in the horizontal position o Cable grips are located at the bottom of the enclosure o Conduit adapters are located on top of the enclosure o The dew / frost point range uses the same unit (˚C or ˚F) as the temperature output. The factory default
setting is frost point below freezing.
o Custom range: be sure to clearly specify the desired range at the time of the order. When a special range
has been ordered, the letters ST and SC are used in columns 4 and 7 in the above table. These generic codes will be replaced with a specific code only for quantity and repeat orders
© 2008; Rotronic AG E-M-HF62-V1_11
E-M-HF62-V1_11
Document code Unit
Rotronic AG Bassersdorf, Switzerland
HygroFlex HF62 Humidity Temperature Transmitters: User Guide

2.2 Mechanical configurations and dimensions

Instruction Manual
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6 of 27
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2.3 Display and keypad option

The upper line of the LC display corresponds to relative humidity or dew / frost point and the bottom line corresponds to the temperature measured by the Pt100 RTD used to provide a compensation for the effect of temperature on the humidity sensor.
It is important to note the following:
o The HF62 uses a separate circuit to generate the
temperature analog signal. The temperature measured by this circuit is not shown on the LC display
o The LC display works only when the HF62 humidity
measuring circuit is powered and the output loop of this circuit is closed
© 2008; Rotronic AG E-M-HF62-V1_11
E-M-HF62-V1_11
Document code Unit
Rotronic AG Bassersdorf, Switzerland
HygroFlex HF62 Humidity Temperature Transmitters: User Guide
Instruction Manual
Page
7 of 27
Document Type
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-HW4v2-F2-008.

3 General description

3.1 Power supply

Each independent circuit of the HF62 (measuring circuit 1 and measuring circuit 2) requires a supply voltage of 10…28 VDC - depending on the load connected to each circuit. If so desired, the same voltage source may used for both circuits. For any of the two circuits, 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. The maximum current consumption is 20 mA per circuit in use.

3.2 Measuring circuits and measured parameters

Circuit 1 of the HF62 measures relative humidity with a ROTRONIC Hygromer® IN1 capacitive sensor and uses the data from a Pt100 RTD to apply a correction for the effect of temperature on the humidity sensor.
Circuit 2 of the HF62 uses a separate Pt100 RTD to measure temperature.

3.3 Calculated parameters

Using the ROTRONIC HW4 software, measuring circuit 1 of the HF62 can be configured by the user to calculate either the dew point or the frost point.

3.4 Analog output signals

By default, the output signal of the HF62 measuring circuit 1 corresponds to humidity. With the ROTRONIC HW4 software the output signal provided by this circuit can be made to correspond to either relative humidity or to the calculated parameter.
By default, the output signal of the HF62 measuring circuit 2 corresponds to temperature and this setting should not be changed by the user.
If so desired, the analog output signal from any of the two independent circuits can also be disabled.
Using the ROTRONIC HW4 software, the scale of each analog output signal can be set within the numerical limits of -999.99 and 9999.99.
© 2008; Rotronic AG E-M-HF62-V1_11
E-M-HF62-V1_11
Document code Unit
Rotronic AG Bassersdorf, Switzerland
HygroFlex HF62 Humidity Temperature Transmitters: User Guide
Instruction Manual
Page
8 of 27
Document Type

3.5 Service connectors

The HF62 consists of two fully independent measuring circuits and the HF62 has two separate mini-USB type service connectors, each corresponding to a separate UART interface.
Circuit 1 (humidity):
The service connector of circuit 1 can be accessed without opening the enclosure and allows connecting the HF62 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 this service connector and for the type of service cable to be used.
Circuit 2 (temperature):
Both the Pt 100 RTD temperature sensor and associated electronics used by circuit 2 are very stable and should not require any adjustment after the initial factory adjustment. The service connector of circuit 2 is not designed to be accessed by the user and is located inside the enclosure on the PCB mounted inside the gray top-half of the enclosure.

3.6 Sensor protection (dust filter)

The probe of the HF62 requires a filter to protect the sensors against dust particles and high air velocity.
Wall mount models: the probe of the HF62 is equipped with a slotted cap with a Polyethylene insert Duct mount and cable probe models: the probe of the HF62 is equipped with a with a metal filter base
mod. NSP-ME. The filter cartridge must be ordered separately (see Accessories 11.6). Filter cartridge mod. SP-M15 is suitable for most applications.

3.7 Direct RTD option

As an option, the HF62 can be ordered with the Pt100 RTD normally used by measuring circuit 2 directly connected by 4-wires to a terminal block located on the transmitter PCB. In this case, the electronics of the HF62 consist of just one circuit corresponding to humidity.

4 User configurable settings and functions

The HF62 ships configured as specified on the customer order. Models with analog outputs can be installed and used just as any conventional humidity and temperature transmitter and most users will never need to use the HF62 configurable settings and functions. Models with a digital interface generally require some configuration by the user.
Making use of the HF62 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 HF62 functions and also indicated the factory default settings.
IMPORTANT: the HF62 functions are limited to circuit 1 only (humidity and temperature measured by the Pt100 RTD used to compensate the humidity sensor).
© 2008; Rotronic AG E-M-HF62-V1_11
E-M-HF62-V1_11
Document code Unit
Rotronic AG Bassersdorf, Switzerland
HygroFlex HF62 Humidity Temperature Transmitters: User Guide
Instruction Manual
Page
9 of 27
Document Type

4.1 Function overview

MEASUREMENT ACCURACY AND RELIABILITY AirChip 3000 Functions Description
► Humidity / temperature adjustment o 1-point or multi-point humidity calibration or adjustment
o 1-point or 2-point temperature calibration or adjustment o Generate a time stamp for calibrations and adjustments o Retain and view last adjustment date and adjustment values o Generate calibration and adjustment protocols
► Automatic humidity sensor test and optional drift compensation
► Data recording The data recording function differs from a true data logging
MEASUREMENT LOOP VALIDATION AirChip 3000 Functions Description
► Simulator mode Used to make the HF62 generate fixed values for the humidity,
DEVICE SAFEGUARDS AirChip 3000 Functions Description
► Device write protection Used to protect the HF62 with a password to prevent
► Internal menu access from keypad Used to prevent accidental changes to the HF62 settings and
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)
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
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 session 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
temperature and calculated parameter. Can be configured, enabled or disabled
unauthorized digital access by a digital user. Can be configured, enabled or disabled
temperature-humidity adjustment by disabling the MENU key on the optional keypad. Can be enabled or disabled
© 2008; Rotronic AG E-M-HF62-V1_11
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