E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroGen2: Humidity and Temperature Generator
with AutoCal and Range Extension options.
Instruction Manual
Instruction Manual for Software
Version 2.0.x
Document Type
Document title
Instruction Manual
© 2009-2010; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
Advisory Notice
HygroGen2: Important notice before first use
Document Type
Page
Document title
i
HygroGen2 - IMPORTANT NOTICE BEFORE FIRST USE:
Congratulations on purchasing the HygroGen2 humidity and temperature generator. To get the
most out of your instrument and ensure accurate and rapid humidity and temperature calibrations
over many years, please familiarize yourself and adhere to the best practices and procedures as
detailed in this manual.
Please carefully remove the HygroGen2 from the packaging and visually inspect for any signs of
damage. Check the contents against the list on page iv (Contents of the Standard Supply Package).
Report any damage or missing parts immediately to your supplier.
Please note the following important information:
DO NOT transport the HygroGen2 without first emptying the water reservoir
The HygroGen2 is designed to be portable, but it is vitally important to empty the water reservoir using the HGFill syringe - before transporting it. The full procedure is described in section 2.4. Failure
to do this will damage the instrument.
Follow correct Shutdown Procedure
Please be aware that incorrect shutdown of the HygroGen2 can lead to failure of the instrument.
Please adhere to the Shutdown Procedure Advisory on pages ii-iii.
© 2009-2010; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
Advisory Notice
HygroGen2: Important notice before first use
Document Type
Document title
Page
ii
ADVISORY NOTICE - SHUTDOWN
PROCEDURE
Version 1.1
This Document describes how to
correctly switch off a HygroGen2.
Introduction:
Incorrectly powering down or unplugging
the HygroGen2 while in use may cause a
software corruption. This may mean the
HygroGen2 will not start.
To correctly shutdown the HygroGen2
during normal operation:
1) Press “Power Off” button on screen.
2) Select “Shut Down”.
3) Allow the HygroGen2 to shutdown.
The HygroGen2 will isolate the
humidifier and cool/dry to ensure
excess water is removed. This may
take several minutes.
Alternative procedures including force,
transit and fast shutdown are detailed on
the next page.
DO NOT switch off at the back of the HygroGen2 or remove power from the
HygroGen2 before it has shutdown.
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
Advisory Notice
HygroGen2: Important notice before first use
Document Type
Document title
Page
iii
Summary of Shutdown Procedure
Standard Shutdown:
“Power Off“ button on screen
Use to shutdown the HygroGen2 gracefully in
normal operating conditions.
The HygroGen2 will isolate the humidifier from the
chamber and cool/dry to ensure excess water is
not left in the chamber. This process may take
several minutes.
Transit Shutdown:
“Power Off” button on screen
Use to shutdown HygroGen2 gracefully if the
HygroGen2 is to be transported.
The HygroGen2 will ask for the humidifier to be
emptied of water. It will isolate the humidifier
from the chamber and then cool/dry the chamber
to ensure excess water removed. This process may
take several minutes.
Fast Shutdown:
Front Panel Power button, 1 second push
This switches the HygroGen2 off without saving
any settings. It does not allow the HygroGen2 to
dry the chamber or isolate the humidifier. After
pushing the button it will take about 15 seconds
for the HygroGen2 to switch off.
Force Shutdown:
Front Panel Power button, 5 second push
This forces the HygroGen2 to shutdown
immediately. The HygroGen2 does not dry, isolate
the humidifier or save any settings.
This process should only be used if all the other
shutdown options fail.
DO NOT switch off at the back of the HygroGen2 or remove power from the
HygroGen2 before it has shutdown.
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
Advisory Notice
HygroGen2: Important notice before first use
Document Type
Document title
Page
iv
Contents of the Standard Supply Package:
•
•
•
•
•
•
•
•
•
•
1
HG2-S HygroGen2 generator
HG2-DES Desiccant cell filled with molecular sieve (pre-installed).
IEC mains cable
HG2-FILL Water fill syringe (with tube)
HC2-S HygroClip control probe (pre-installed) with calibration certificate 1
Sample Loop connector cover plugs
This Manual
Chamber door (according to customer's order) 2
HW4 software ID number
USB memory stick including saved test data and user manual.
The calibration certificate included will vary according to the country of supply.
In some countries, the chamber door is delivered with the HygroGen2. Due to the diversity of chamber doors
and bungs, these are normally ordered separately and may be delivered in separate packaging.
2
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroGen2: Important notice before first use
Table of Contents
Document Type
Document title
1
2
3
4
5
Scope of Document ................................................................................................................1
1.1 Introducing the HygroGen2 ................................................................................................... 1
1.2 AutoCal and Range Extension Options .................................................................................. 1
1.3 Temperature and Humidity References................................................................................. 2
Setting up the HygroGen2 ......................................................................................................3
2.1 Physical Location .................................................................................................................... 3
2.2 Electrical Supply ..................................................................................................................... 3
2.3 HygroGen2 Assembly ............................................................................................................. 4
2.4 Water Reservoir ..................................................................................................................... 5
HygroGen2 Operation ............................................................................................................8
3.1 Switching On .......................................................................................................................... 8
3.2 Upgrading From Previous Versions ........................................................................................ 8
3.3 HygroGen2 Touchscreen Interface ........................................................................................ 9
3.3.1 Primary Controller Screen ....................................................................................... 10
3.3.2 Trend Screen ........................................................................................................... 12
3.3.3 Programmer Function Screen ................................................................................. 12
3.3.4 Settings Screen ........................................................................................................ 14
3.4 AutoCal (optional) ................................................................................................................ 15
3.4.1 Activation ................................................................................................................ 15
3.4.2 AutoCal Reference .................................................................................................. 15
3.4.3 AutoCal Screen ........................................................................................................ 15
3.4.4 AutoCal Program Edit .............................................................................................. 16
3.4.5 AutoCal Operation and Best Practices .................................................................... 16
3.4.6 Customising the PDF Calibration Certificate ........................................................... 18
3.5 Range Extension (optional) .................................................................................................. 19
3.6 Operation Precautions ......................................................................................................... 19
3.6.1 Water in the Chamber............................................................................................. 19
3.6.2 Below Ambient Temperature Operation ................................................................ 20
3.6.3 Above Ambient Temperature Operation ................................................................ 21
3.6.4 Probe Insertion Depth ............................................................................................. 21
3.6.5 Protective filters ...................................................................................................... 21
3.6.6 Low Water Level Alarm ........................................................................................... 21
3.6.7 Water Level Indicator Calibration ........................................................................... 22
3.7 Switching off the HygroGen2 ............................................................................................... 23
3.8 Preparing the Unit for Transit or Storage ............................................................................ 24
HW4 Embedded ................................................................................................................... 25
4.1 HW4 Set Up and Getting Started ......................................................................................... 25
4.2 HW4 Installation and Registration ....................................................................................... 25
4.3 HW4 Support........................................................................................................................ 25
4.4 HW4 Updates and Upgrades................................................................................................ 26
Peripherals and Settings....................................................................................................... 27
5.1 USB Keyboard and Mouse.................................................................................................... 27
5.2 External Monitor .................................................................................................................. 27
5.3 Configuration Mode Settings ............................................................................................... 28
5.3.1 Date and Time Settings ........................................................................................... 29
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroGen2: Important notice before first use
Table of Contents
Document Type
Document title
5.3.2 Touch Screen Calibration ........................................................................................ 29
HygroGen2 and HW4 Feature Upgrades and Software Updates ............................................. 29
Servicing and Maintenance .................................................................................................. 30
7.1 Control HygroClip Calibration .............................................................................................. 30
7.2 Desiccant .............................................................................................................................. 30
7.3 HygroGen2 Cleaning ............................................................................................................ 32
7.4 Annual Servicing of HygroGen2 ........................................................................................... 33
A1: Calibration Reference Options ............................................................................................... 34
A1.1 Internal RH Probe Reference ................................................................................................. 34
A1.2 External RH Probe Reference ................................................................................................. 35
A1.3 Chilled Mirror Reference........................................................................................................ 35
A2: Temperature Control ............................................................................................................ 38
B1: HygroGen2 / Screen Messages............................................................................................... 39
B2: HygroGen2 Specification ....................................................................................................... 40
B3: HygroGen2 Order Codes: ....................................................................................................... 41
C1: HygroGen2 Warranty Statement............................................................................................ 43
C2: Manufacturer & Service Centre Contact Information .............................................................. 44
D1: HygroGen2 Uncertainty Framework - Internal RH Probe......................................................... 45
D2: HygroGen2 Uncertainty Framework - External RH Probe ........................................................ 46
D3: HygroGen2 Uncertainty Framework - Chilled Mirror Reference .............................................. 47
D4: Dew Point Uncertainty Analysis............................................................................................. 48
6
7
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroGen2: Humidity and Temperature Generator
with AutoCal and Range Extension options.
Instruction Manual
Instruction Manual for Software
Version 2.0.x
Document title
1
Document Type
Page
1 of 55
Scope of Document
This instruction manual refers to HygroGen2 running software version 2.0.x. To determine the
software version your instrument is running please refer to the Settings screen as shown in section
3.3.4. For version 1.x.x the software revision number is displayed by pressing the ‘HGInfo‘ button, for
version 2.0.x select ‘Info‘ from the ‘Service‘ drop down menu. An equivalent manual is available
on www.rotronic.com for HygroGen2 instruments running software version 1.x.x.
1.1 Introducing the HygroGen2
The HygroGen2 is a generator of controlled relative humidity and temperature environments,
primarily for use in calibrating humidity instrumentation, but also well suited to the calibration of
temperature instrumentation, particularly those used for the measurement of temperature in air.
It is a completely self-contained, portable unit requiring no external resources except mains power.
This allows technicians to perform calibrations in the laboratory, workshop or on-site.
The HygroGen2 uses a mixed flow method for generating the %rh required by the user. A desiccant
cell provides a source of low humidity, and a piezoelectric humidifier generates high humidity. A
Peltier element is used for heating and cooling the chamber. Measurement and control is provided
by a combination of a ROTRONIC HygroClip probe, an embedded Platinum Resistance Thermometer
(PRT) and a multi-loop controller. Set-points are entered using the touch screen front panel display.
1.2 Enhanced Features : AutoCal and Range Extensions
With the introduction of software version 2.0.x the HygroGen2 comes with optional Enhanced
Feature upgrades: AutoCal and RH/Temperature Range Extensions. These are activated by the
application of a licence key, available via your ROTRONIC dealer.
AutoCal allows you to pre-program a series of set points and times, and record the instrument‘s
progression through them in a PDF Calibration Certificate which is written to an external USB disk
drive. Any values recorded on ROTRONIC HygroClip probes attached to the HygroGen2 via USB
adaptors are recorded in the certificate. Probes can be set to automatically adjust to match the
HygroGen reference probe at predetermined values.
With optional Range Extensions, the instrument is capable of creating chamber conditions down to
-5°C and 2%rh and up to 99%rh.
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroGen2: Humidity and Temperature Generator
with AutoCal and Range Extension options.
Instruction Manual
Document title
Instruction Manual for Software
Version 2.0.x
Document Type
Page
2 of 55
1.3 Temperature and Humidity References
The HygroGen2 creates stable temperature and humidity conditions uniformly within its test
chamber. Instruments under test (IUTs) are inserted into the chamber and compared to a reference
to calibrate and monitor their performance so that any appropriate adjustments can be made.
There are three main relative humidity (RH) calibration reference types that can be used with the
HygroGen2. Each has its own advantages and disadvantages, so the reference chosen should be
determined by the uncertainty of measurement required.
•
•
•
Internal control RH probe reference
External RH probe reference
Chilled Mirror Hygrometer reference
Corresponding temperature references integrated in the above may be used, or additional external
temperature references employed, for example platinum resistance thermometers (PRTs).
It is vital to consider the comparison of temperatures measured by the reference, the HygroGen2
and instruments under test. Because RH is significantly dependent on temperature, temperature
measurement should be optimised to get meaningful RH results.
For more details please see Appendix A1: Calibration Reference Options and Uncertainty.
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroGen2: Humidity and Temperature Generator
with AutoCal and Range Extension options.
Instruction Manual
Document title
2
Instruction Manual for Software
Version 2.0.x
Document Type
Page
3 of 55
Setting up the HygroGen2
2.1 Physical Location
To ensure correct operation please ensure that:
1. The unit is level and stable;
2. There is at least 15 mm clearance underneath and at least 100 mm at the back of the unit to
enable adequate air flow;
3. There is adequate access to the electrical mains connection at the rear of the unit.
Note: The feet on the rear panel are for standing the unit for service purposes, and to ensure a
sufficient air gap behind the unit. The unit will not operate in the vertical position.
2.2 Electrical Supply
Power Isolation
The unit is supplied with a mains cord set. The unit should be disconnected from the electrical supply
before the unit is moved, cleaned or has water added or removed.
Earthing
This unit must be earthed. Provision for the safety earth is made through the electrical mains
connection (Figure 2, 8) to which all parts of the unit requiring earthing are internally connected. An
earthed electrical supply is required.
Earth Leakage Current
Due to RF filtering there is an earth leakage current, within the limits specified in EN 61010-1:2001.
This may affect mains power circuits protected by Residual Current Device (RCD) or Ground Fault
Detector (GFD) type circuit breakers (particularly if used in multiples or with other equipment with
an earth leakage current on the same supply circuit).
Over Current Protection
To protect the internal circuitry against excess currents, the mains supply to the unit must be
connected with the mains cord set provided with the unit and to an appropriate mains supply.
Voltage Rating
The unit is designed to work within the limits of a 110-230 VAC 50-60 Hz mains supply with voltage
fluctuations up to ± 10% of the nominal voltage. The unit is rated impulse withstand (over voltage)
category II of IEC 60364-4-443. Where occasional voltage transients over 2.5 kV are expected or
measured, it may be necessary that the power installation to the unit includes a transient limiting
device.
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroGen2: Humidity and Temperature Generator
with AutoCal and Range Extension options.
Instruction Manual
Instruction Manual for Software
Version 2.0.x
Document Type
Page
Document title
4 of 55
Mains Filtration
If there is risk of power spikes or breaks, it is recommended that an Uninterruptable Power Supply
(UPS) is used to provide continued power and mains filtration. This should be rated according to the
HygroGen2 power specifications (see Appendix B2) and the time required to run/shutdown during
power outage.
Conductive Pollution
The unit is rated Pollution Degree 2 and must not be operated in environments where conductive
pollutants (for example carbon) may enter the unit (this includes excessive moisture ingress).
2.3 HygroGen2 Assembly
1)
2)
3)
4)
5)
6)
7)
8)
Power switch
USB ports
Touch screen controller
Water port
Desiccant cell
Chamber door
Probe aperture bung
Handle
Figure 1: Front of HygroGen2
1)
2)
3)
4)
5)
6)
7)
8)
9)
Sample loop return
Sample loop outlet
USB ports
DVI monitor interface
Ethernet socket (service use)
Type label
Fan outlet
Electrical mains connection
Power switch
Figure 2: Rear of HygroGen2
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroGen2: Humidity and Temperature Generator
with AutoCal and Range Extension options.
Instruction Manual
Document title
Instruction Manual for Software
Version 2.0.x
Document Type
Page
5 of 55
HygroGen2 Chamber and Door
The HygroGen2 does not come supplied with a door. There are various standard and customized
versions available, depending on the intended use for the instrument, the use of an external
reference (see Appendix A1.2), and the instruments under test. Figure 1,6 shows the 30mm 5-port
version (part code: HG2-D-8888). Other options are listed in Appendix B3.
To access the HygroGen2 chamber, remove the door. Grip firmly and twist the door anti-clockwise.
In the event that this proves difficult, cool the chamber first (see later sections). Occasional
application of silicone grease around the door “O” ring seal will ease movement.
Replacement can be in any position, and requires only a gentle clockwise twist.
Before using your HygroGen2, make sure that the door is secured and that all probe apertures that
are not in use are sealed with a bung (Figure 1,7) or appropriate alternative seal.
Desiccant Cell
The unit should be supplied with the desiccant cell (Figure 1,5) in place. For further details and best
practice for desiccant handling please see section 7.2.
External Sample Loop
Unless an external sampling system is to be used (see Appendix A1.3), ensure the sample loop caps
(Figures 2,1 and 2,2) are firmly secured.
HygroClip Control Probe
The HygroGen2 chamber conditions are monitored and controlled by a ROTRONIC HygroClip RH and
temperature probe. Depending on the circumstances and external references employed (see
Appendix A1.2 – External Reference Guidelines) this probe may be removed for regular calibration
(see section 7.1).
Note: For speed of response, this probe must be employed without protective filters.
2.4 Water Reservoir
The HygroGen2 requires 50 - 80 ml of distilled water in the internal reservoir. Insufficient water will
deactivate the humidification system. As long as extreme care is taken not to overfill the water
reservoir the HygroGen2 may be filled and emptied either with the unit powered up or shut down.
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroGen2: Humidity and Temperature Generator
with AutoCal and Range Extension options.
Instruction Manual
Document title
Instruction Manual for Software
Version 2.0.x
Document Type
Page
6 of 55
To fill the HygroGen2
1. Insert the tube of the dosing syringe, with the plunger fully depressed, 10 mm into the water
port and extract any residual water by drawing out the plunger.
2. Depress the collar on the water port (Figure 1,4), remove the dosing syringe tube. Wipe up
any spilt water with an absorbent cloth immediately.
3. Fill the dosing syringe with 80 ml of distilled water. Insert the end of the dosing syringe tube
firmly back into the water port and discharge the syringe steadily. (If water leaks during this
operation the filler tube is not correctly inserted in the water port.)
4. Depress the collar on the water port to remove the dosing syringe tube. Wipe up any spilt
water with an absorbent cloth immediately.
5. A water level indicator is shown in the Settings screen (see section 3.6.7).
Figure 3: How to fill and empty the Water Reservoir
Caution: Do not overfill the HygroGen2
Overfilling of the unit will result in poor humidification and in extreme cases water may be pumped
into the chamber. If the HygroGen2 is overfilled the humidifier should be fully emptied and then
refilled with 50 –80 ml of water (as described above). If there is water present in the chamber of the
HygroGen2, this should be removed using an absorbent cloth. Ensure the HygroGen2 is switched off
and the mains power unplugged before manually drying the chamber.
To empty the HygroGen2:
1. Insert the tube of the dosing syringe, with the plunger fully depressed, 10 mm into the water
port and extract any water by drawing out the plunger.
2. Depress the collar on the water port to remove the dosing syringe tube. Wipe up any spilt
water with an absorbent cloth immediately.
3. Distilled water discharged from the HygroGen2 may be stored safely and reused at a later
date.
Note: The HygroGen2 should always be emptied if it is being shipped or stored (see section 3.8
Preparing the Unit for Transit or Storage). This will prevent ingress of water into the chamber
should the unit be inverted, and prevent possible frost damage.
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroGen2: Humidity and Temperature Generator
with AutoCal and Range Extension options.
Instruction Manual
Document title
Instruction Manual for Software
Version 2.0.x
Document Type
Page
7 of 55
Water Quality
The HygroGen2 should only be filled with distilled water.
As a precaution against any microbial and algae water contamination, HygroGen2 incorporates an
Ultra Violet (UV) sterilisation lamp within the water reservoir. No user intervention is required;
HygroGen2 auto cycles the process.
Under no circumstance should the water reservoir be opened by non-qualified personnel. Direct
exposure to UV lamps can cause burns or blindness.
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroGen2: Humidity and Temperature Generator
with AutoCal and Range Extension options.
Instruction Manual
Document title
3
Instruction Manual for Software
Version 2.0.x
Document Type
Page
8 of 55
HygroGen2 Operation
3.1 Switching On
1. Ensure the electrical mains supply is correctly plugged in and switched on.
2. Switch the unit on by pressing the Power Switch (see figure 1,1) once.
3. The fans within the unit will switch on giving an immediate audible indication the unit is
powered.
4. The controller will power up and display the controller primary screen (as shown in figure 6).
On power up:
•
•
•
The temperature and humidity set-points default to the last set values.
The temperature control defaults to automatic mode (controlling the temperature).
The humidity control defaults to manual mode.
If the “Low Water Level” alarm is displayed then the unit should be filled as described in the “How to
Fill the Water Reservoir” Section 2.4. Humidification is disabled until water is filled.
Figure 4: Low Water Level Alarm
3.2 Upgrading From Previous Versions
If you have upgraded your HygroGen2 software from version 1.x.x, the installation process installs
HW4 version 3.1. If you do not wish to activate the upgrade features (AutoCal and Range Extension)
and you wish to use or only have an HW4 version 2.x licence, please email hygrogen@rotronic.co.uk
for instructions to downgrade the HW4 software back to its original version, or contact your
ROTRONIC dealer for HW4 upgrade options.
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroGen2: Humidity and Temperature Generator
with AutoCal and Range Extension options.
Instruction Manual
Document title
Instruction Manual for Software
Version 2.0.x
Document Type
Page
9 of 55
3.3 HygroGen2 Touchscreen Interface
The HygroGen2 controller consists of four top level screens that are accessed using the forward or
back buttons in a loop:
Figure 5: HygroGen2 Screens
NB Programmer Screen Functionality is different when AutoCal functionality is activated.
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroGen2: Humidity and Temperature Generator
with AutoCal and Range Extension options.
Instruction Manual
Document title
Instruction Manual for Software
Version 2.0.x
Document Type
Page
10 of 55
3.3.1 Primary Controller Screen
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
Menu access (top left corner HOME)
Actual chamber temperature
Temperature set point
Temperature control status indicator
Automatic/Manual selection
Actual chamber humidity
Humidity set-point
Humidity control status indicator
Automatic/Manual selection
Back to previous screen
Access programmer function
Access HW4 software
Power off
Forward to next screen
Figure 6: Controller Primary Screen
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroGen2: Humidity and Temperature Generator
with AutoCal and Range Extension options.
Instruction Manual
Document title
Instruction Manual for Software
Version 2.0.x
Document Type
Page
11 of 55
Automatic/Manual Mode
Figure 7: Temperature and Humidity Control
Both temperature and humidity control can be set to automatic or manual. Automatic mode results
in the unit attempting to adjust to the temperature (or humidity) in the chamber to match the setpoint value. Manual mode (automatic/manual selection displays “Off”) prevents the unit from trying
to control the chamber.
Setting Temperature and Humidity Set-Points
At any time, the user can change humidity or temperature set-points by simply touching the setpoint on screen. A pop-up will appear, and either the touch screen or, where connected, the
keyboard/mouse used to input desired values.
Figure 8: Set-Point Entry Pop-Up
Note: To aid a smooth and efficient transition between temperature set-points the controller is
programmed to suspend humidification during changes in temperature. Once the chamber
temperature is within 0.7°C of the temperature set-point, the humidity control is activated.
When set-point combinations that resolve a low dew point condition (i.e. 0°C, 5%rh = -36°C dew
point) are programmed, make sure that the desiccant is dry enough to achieve the desired value.
Check the desiccant condition on screen (Figure 12) and consult maintenance records to establish
when the desiccant was last changed. Stabilisation time to low RH conditions will be longer than
normal as the chamber and internal surfaces need to be very dry.
Note: Once the HygroGen2 has reached a stable condition, the Auto/Manual button will change
colour to green.
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroGen2: Humidity and Temperature Generator
with AutoCal and Range Extension options.
Instruction Manual
Document title
Instruction Manual for Software
Version 2.0.x
Document Type
Page
12 of 55
3.3.2 Trend Screen
The Trend Screen shows the instrument‘s conditions and the set-points the instrument is
programmed to reach. The y axis is self-scaling; the x axis (time) can be adjusted by tapping
anywhere along it and typing in the desired timescale.
Figure 9: Trend Screen
3.3.3 Programmer Function Screen
The HygroGen2 programmer function enables the user to automate a sequence of RH and/or
temperature set-points.
Figure 10: Programmer
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroGen2: Humidity and Temperature Generator
with AutoCal and Range Extension options.
Instruction Manual
Instruction Manual for Software
Version 2.0.x
Document title
Document Type
Page
13 of 55
Program – Identifies the program number and its description. You can use the “<<” and “>>” buttons
to scroll through the saved programs.
Step – Identifies the set-point within the program and its values. You can use the “<<” and “>>”
buttons to scroll through the steps. (SP = Set-Point)
Play/stop – Starts or stops the program and displays the Run and Step timing information.
Program Run Time – reports how long the current program has been running.
Step Remaining – reports how long the current program step has left to run.
Current control value and set-points are displayed at the bottom of the screen.
Figure 11: Edit Program
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
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Bassersdorf, Switzerland
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Defining Programs
To define the programs, either press/click a set-point value or the “Edit” key. This opens the
Program Edit screen as shown.
The step-point steps are numbered, and set-point values and step duration can be defined below.
Steps can also be inserted or deleted as required.
A graphical representation of the program is shown above each point.
A title for each program can be entered at the bottom of the screen (using an attached USB
keyboard).
Intermediate steps to achieve ‘incremental‘ changes between each set-point can be programmed by
selecting the green button next to each parameter; otherwise the instrument will attempt to reach
the set-point as quickly as possible.
For each program temperature and humidity stabilisation values can be defined. Once the chamber
conditions are within this tolerance the step duration timing begins. If set to zero, no stabilisation
criteria are applied, and the timing of the step duration begins immediately.
NB This functionality is only available through the HOME menu when AutoCal feature is activated.
Please see section 3.4.
3.3.4 Settings Screen
1. Water level display
2. Desiccant condition display
3. Settings->
Monitor Setup
Water Level
[AutoCal]
Date and time
Touch Screen
4. Updates->
Update Software
Upgrade Features
5. Service Menu->
Service
Info
Figure 12: Setting Screen
See later sections for further details on the operation of these features.
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
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with AutoCal and Range Extension options.
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3.4 AutoCal (optional)
3.4.1 Activation
To upgrade your HygroGen2 with the AutoCal feature, please purchase an activation key via your
ROTRONIC dealer. Enter the code via the Settings Screen. Select “Upgrade Features“ from the
“Updates“ drop down menu, enter the feature code and press OK.
With AutoCal activated, the top level Programmer Function Screen is replaced by the AutoCal screen
below. The standard Programmer functionality is still available via the drop down menu in the top
left hand corner of the screen.
3.4.2 AutoCal Reference
AutoCal uses the internal control HygroClip as the reference. External references are not supported.
For a more in-depth discussion on references and calibration traceability, please see Appendices A1
and A2.
3.4.3 AutoCal Screen
As ROTRONIC probes are added via the USB ports, the individual probe slots are populated within
the AutoCal Screen. During an AutoCal calibration run, probes can be adjusted or not as desired for
each probe. Select individual probes by selecting the “Adjust“ button.
Figure 13: AutoCal Screen
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
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with AutoCal and Range Extension options.
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3.4.4 AutoCal Program Edit
Pressing the Edit button calls up the AutoCal Program Edit screen.
Figure 14: AutoCal Program Edit Screen
Set-points are programmed in an identical way to the standard Programmer. However, the green
buttons take on a different function; they are now used to determine the adjustment points. Probes
that are selected for adjustment within the AutoCal screen (3.4.3) will be adjusted at points that are
selected here. Only one temperature point can be selected, and must be selected as the first
adjustment point. This is because of the way the HygroClip probes work: if temperature is adjusted,
corresponding adjustments for RH are made at the same time. This policy is enforced by the
software: greyed out buttons refer to options that are not possible, a dark green button is a point
not selected for adjustment, and bright green is a point selected for adjustment.
It is not possible to select different adjustment points for different probes. If this is desired, please
run a new program at a later time. Tolerance for set-points to be considered stable is set in the same
way as for the Standard non-AutoCal version (section 3.3.3).
Points can be set for a minimum duration of 15 minutes; please ensure sufficient time is allowed for
the probe to stabilise. A duration of at least an hour is strongly recommended, longer for extremes
of temperature or RH. The timing of a set point will begin when the chamber is within the set
tolerance. Take particular care to allow sufficient time to allow for stabilisation of probes with
particular filters applied.
3.4.5 AutoCal Operation and Best Practices
Once the program and adjustment points are determined, programs are started by pressing the
“Play“ (>) button. After a succesful run, AutoCal saves a time-stamped PDF calibration certificate to a
USB drive plugged into the HygroGen2. Included in the PDF is the program name, set and adjustment
points, probe serial numbers and relevant calibration reference information. It is further possible to
upload a custom logo and other user and refference information (see section 3.4.6). A separate PDF
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
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is generated for each probe. NB AutoCal will not run unless a USB drive is detected by the
HygroGen2.
Before selecting a probe for adjustment, it is recommended to perform an initial assessment
calibration run without adjustment selected. At the end of the run, examine the PDF calibration
certificate saved to the USB drive and determine whether you want to re-run the program with
adjustment selected.
For each set-point values for temperature and humidity are recorded on the calibration certificate
every 2 minutes for the last 10 minutes of the set-point.
At the first adjustment point to be applied, AutoCal will initially delete any previously saved
calibration points stored on the probe. This is recorded on the certificate. It will then apply the
values of the reference probe as a corrected value. This value is determined at the instanct the
correction is saved and is not an average of the previously recorded 5 points as shown in the
calibration certificate; these are shown in the certificate to give the user an estimate of stability.
Please note, for probes with adjustment selected, AutoCal will always attempt to make an
adjustment. If the correction is smaller than the resolution of the probe itself, the adjustment may
not be applied.
If at end of the run the probe has acknowledged all instructions it has been sent, the “Completed“
button will turn green on the AutoCal screen and the PDF is saved to the USB drive. Details of the
probes‘ progress throughout the run can be viewed via the “Details“ button. If for any reason the
run is not successful – e.g. if a probe is unplugged mid-run - a csv file is saved instead with a log of
the points that were recorded.
Please note, the performance of a HygroClip2 within its stated specification is based on temperature
adjustment being made at 23°C. AutoCal does permit the adjustment to be made at other
temperatures. However, this is only recommended when the operational environment of the probe
being adjusted is only ever at another specific temperature, e.g. a stability cabinet at 40°C.
Adjustments made at temperatures other than 23°C risk comprising the probes ability to meet its
specification between the range of optimal performance: 18 and 28°C .
Please note that HW4 cannot be used at the same time as AutoCal.
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
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with AutoCal and Range Extension options.
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3.4.6 Customising the PDF Calibration Certificate
The PDF certifcate can be customised by selecting ‘Edit Info‘ from the AutoCal screen (figure 13) or
selecting ‘AutoCal‘ from the Settings menu on the Settings screen. It is possible to enter user and
company information, reference/standard information (including the last and due calibration dates)
and to upload a custom logo.
Figure 15: Edit AutoCal Certificate
Figure 16: Edit AutoCal Certificate Contact Information
To upload a logo, save it as a a file ‘logo.jpg‘ to the root directory of a USB stick. Insert the USB into
the HygroGen2. The HygroGen2 will detect the file and display your image. Select ‘Upload Logo‘.The
logo will be uploaded to the unit and will appear automatically sized and positioned on the PDF
certificate below the “Rotronic HygroGen“ logo.
Figure 17: Upload Logo
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
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Unit
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Information about the calibration of the reference probe itself can be entered by pressing ‘Ref Std‘:
Figure 18: Edit AutoCal Standard Information
When an AutoCal run is started, the user is warned should the reference calibration be out of date
and prompted to update the reference information should the reference probe have been swapped
out. The user is further asked to confirm that the operator name to be printed on the certificate
does not require changing.
3.5 Range Extension (optional)
Range Extension can be bought at the same time and included with the same activation code as
AutoCal, or it can be purchased separately. Activate the feature code in the same manner as AutoCal
(section 3.4.1). Range extension allows the unit to operate down to -5°C and 2%rh and up to 99%rh
(between 10°C and 45°C). The unit is able to reach 90%rh above 45°C and below 10°C.
Please be aware that it may take a long time to reach set-points at these extremes of temperature
and humidity, and the unit may need to be individually adjusted to optimise performance. Expert
knowledge of PID parameters is required to do this. Access is via the Service Menu, which is locked
down for standard operation. For further information please contact hygrogen@rotronic.co.uk.
The unit can be configured to produce conditions lower than 2%rh, but the performance and
stability of the instrument below this RH is not guaranteed. Furthermore, the accuracy of the control
probe needs to be borne in mind.
3.6 Operation Precautions
3.6.1 Water in the Chamber
Before using the HygroGen2, check that there is no visible water inside the chamber. If the last
condition run by the HygroGen2 was at high humidity, and the unit not correctly shut down (see
below), condensation may have formed. Remove excess water using absorbent tissue and initially
run the HygroGen2 at an elevated temperature (40°C) and low RH set-point to dry the system before
calibrations are run.
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
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with AutoCal and Range Extension options.
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3.6.2 Below Ambient Temperature Operation
If the chamber is cooling (or maintaining a temperature below ambient), then the heat pump
assembly inside the chamber will necessarily be below the chamber temperature. If the humidity in
the chamber is high, the cool heat pump assembly can bring the local air temperature below the
dew point, causing condensation to occur on the internal heat pump assembly. If run under these
conditions for extended periods condensation will collect in the chamber. This will not affect
chamber performance within normal operating ranges (though it will increase the time to achieve
low humidity). Water in the chamber can be removed using an absorbent tissue. Ensure the
HygroGen2 is switched off before manually drying the chamber.
When operating the unit at high humidity and chamber temperatures of more than a few degrees
below ambient, the following procedure will minimise condensation in the chamber during
stabilisation.
1.
2.
3.
4.
5.
6.
Set the set-point temperature to approximately ambient.
Set the set-point humidity to 10%rh and allow the HygroGen2 to stabilise.
Set the humidity control to Manual (as described in Automatic/Manual Mode Section 3.3.1).
Apply the temperature set-point to that desired and allow the HygroGen2 to stabilise.
Wait for the Humidity reading to fully stabilise (may take 15 to 20 minutes).
Set the humidity control loop to Automatic.
It is recommended that the chamber door is not opened when the chamber temperature is below
the ambient temperature as water vapour from the atmospheric air introduced will condense out
into the chamber. The dehumidification of the chamber takes longer at lower chamber
temperatures.
Figure 19: Humidity Map – standard and extended ranges
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
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3.6.3 Above Ambient Temperature Operation
At high temperature and high relative humidity conditions it is necessary to allow the unit to
stabilize to ensure minimal condensation. It is recommended that for making measurements over
45°C and 80%rh that the HygroGen2 temperature be permitted to equilibrate for 20 minutes before
high humidity is introduced. It is also recommended that under these conditions the desired RH level
is achieved in incremental steps, allowing stabilisation at each. If the unit is operated at high
temperature and high humidity for prolonged periods it is strongly recommended that the chamber
is thoroughly dehumidified prior to switching the unit off.
3.6.4 Probe Insertion Depth
When adjusting or calibrating probes against a reference, make sure the insertion depth of each
instrument is the same for each probe. Using the same immersion depth substantially reduces the
effect of any temperature and humidity gradients in the chamber.
The immersion depth of any probe inserted in the HygroGen2 should be within the limits of 100 to
150 mm (4” to 6”), measured from the inner side of the door. This will reduce the effect of room
temperature via stem conduction on the probe.
3.6.5 Protective filters
Make sure you allow appropriate extra time for probes with particular protective filters. These
probes require longer time than the HygroGen2 to stabilise.
The Trend Screen displays the measured values over time (10 minute default on the x axis), so the
user is able to observe whether the HygroGen2 is stable within the acceptance criteria.
3.6.6 Low Water Level Alarm
The unit will inform the operator if the water level in the reservoir is too low with a visual “Low
Water Level” prompt on the controller screen. This prompt may be dismissed by following the onscreen instructions.
Figure 20: Low-Water Level Alarm
© 2012; Rotronic AG
Figure 21: Water Level Indicator
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E-M-HG2-S-V2.0
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If the water level in the saturator falls below 20 ml, humidification is disabled to prevent damage to
the humidifier. Humidification will not be re-activated until the water level is restored.
Replenish the reservoir according to the instructions in section 2.4.
Note: If the “Low Water Level” message appears on the controller screen during use, the HygroGen2
can be topped up with 50 ml of distilled water. This will bring the total water content of the reservoir
to approximately 80 ml.
3.6.7 Water Level Indicator Calibration
The water level sensor may behave differently for different qualities of water. To ensure accuracy of
the water level indicator, period calibration is advised. To access this feature, go to the Settings
Screen, and select “Water Level“ from the “Settings“ drop down menu. Follow the on-screen
instructions.
Figure 22 : Water Level Adjustment
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
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3.7 Switching off the HygroGen2
There are two Shutdown procedures; these are presented after you press the on-screen
power button. It is highly important that these are observed; instrument faults
attributable to incorrect Shutdown are not covered by the warranty.
Figure 23: Water Level
In normal circumstances use Shutdown
This dries the chamber to prevent residual water
and isolates the humidifier from the chamber. Once correctly shutdown, the HygroGen2 is in a
suitable condition for short to medium term periods without use. It is also put into a condition
where it can be moved carefully in a horizontal position (e.g. on a trolley) to a different location (say,
within a building).
Shutdown Procedure:
1. Press “Power Off” button on-screen.
2. Select “Shut Down”.
3. Allow the HygroGen2 to shutdown. The HygroGen2 will isolate the humidifier
and cool/dry to ensure excess water is removed. This may take several minutes.
DO NOT switch off at the wall before the HygroGen2 has shutdown.
DO NOT switch off at the back of the HygroGen2 before it has shutdown.
Use “Transit“
to shutdown and condition the HygroGen2 if the unit is to be transported
or stored for an extended period. The HygroGen2 will ask for the unit to be emptied of water. It will
isolate the humidifier from the chamber and then cool/dry the chamber to ensure excess water is
removed. This process may take several minutes.
Transit Procedure
1.
2.
3.
4.
Press “Power Off” button on-screen.
Select “Transit”.
Empty water as prompted on-screen.
Allow the HygroGen2 to shutdown. The HygroGen2 will isolate the humidifier and cool/dry
to ensure excess water is removed. This may take several minutes.
HygroGen2 will not switch off if the water is not emptied as requested!
DO NOT switch off at the wall before the HygroGen2 has shut down. Failure to do this
may cause software corruption.
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
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with AutoCal and Range Extension options.
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3.8 Preparing the Unit for Transit or Storage
Shutdown the HygroGen2 according to the Transit Shutdown Procedure above.
If the HygroGen2 needs to be shipped, always use the original double-layer cardboard
packaging. The HG-TB transit bag is suitable for hand carrying only; for air or truck shipping
supplement the HG-TB with a sturdy cardboard box with at least 100 mm of foam or other
shock protection surrounding all sides.
When shipping involves air transportation, either remove the chamber door, or at least
one probe bung to prevent condensing of any residual moisture when exposed to low
aircraft hold temperatures.
Figure 24: HG-TB Transit Bag
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
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Bassersdorf, Switzerland
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HW4 Embedded
HygroGen2 comes with HW4 ROTRONIC device control software on its embedded PC. This provides
the user with access to HW4 functionality to access ROTRONIC USB devices without the need for a
separate PC.
HW4 features include:
• Instrument configuration
• Data acquisition
• Measurement display and graphing
• Calibration adjustment
HW4 does not work with other manufacturers‘ USB probes.
4.1 HW4 Set Up and Getting Started
For full functionality, HW4 requires an external monitor, keyboard and mouse to be connected to
the HygroGen2 (see section 5). To start HW4, touch the HW4 icon. Drag the HW4 window on to the
second monitor if available.
Any ROTRONIC USB probes that are connected to the HygroGen2’s USB ports can be connected to
HW4 using the “Search for USB Masters” command. For a full overview of the use and features of
HW4, please refer to the full HW4 manual. This can be obtained from the Downloads section of
www.rotronic.com.
4.2 HW4 Installation and Registration
HW4 is preinstalled and activated during HygroGen2 manufacture. The unique HW4 serial key
number for the machine can be identified via HG Info button on the Settings page of the HygroGen2;
please have this information available in the event that you require technical support.
To register your HW4 software and to assign your full contact details, visit www.rotronic.com and go
to the “Software” Section. Software registration will ensure that you receive full support and
notification of upgrades available.
4.3 HW4 Support
Support for HW4 is available via email. Please contact support@rotronic.ch including your full
contact details, the HygroGen2 serial number and HW4 product key, and a description of your query
or problem. You will receive a response within a maximum of two working days.
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
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4.4 HW4 Updates and Upgrades
The version of HW4 installed on the HygroGen2 is a customised version; standard versions are not
compatible. For details of upgrades and updates please refer to section 6.
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E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
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Peripherals and Settings
5.1 USB Keyboard and Mouse
All standard user functions may be accessed using the HygroGen2 touch screen. However, if desired,
any standard USB keyboard and mouse may be plugged in via front or rear USB ports to facilitate
operation.
This is particularly useful for operating the embedded HW4 ROTRONIC device control software.
5.2 External Monitor
Running the embedded HW4 software on the integrated screen is possible, but not practical, so an
external DVI monitor connection is available on the rear of the HygroGen2. DVI monitors are widely
available; no special configuration or size is required.
To configure the DVI monitor, use the following procedure:
1. Connect the HygroGen2 to the DVI monitor.
2. Plug in USB keyboard and mouse.
3. Go to the Settings page on the HygroGen2.
4. Select Monitor Set-Up – Display Properties appears.
5. Click on monitor 2 icon.
6. Select “Extend my Windows desktop onto this monitor”.
7. Click on “Apply”.
8. Screen resolution should be adjusted to suit the monitor connected.
9. Apply any changes and click “OK” to exit the Display Properties.
10. Click on the HW4 icon.
11. HW4 will open on the HygroGen2 screen.
12. Using the mouse, drag the HW4 window so that it displays on the monitor.
13. You can now size the HW4 window to suit the connected monitor.
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
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5.3 Configuration Mode Settings
Certain settings: Date/Time and Touch Screen calibration require the HygroGen2 to reboot into
Configuration/Update Mode. Selecting either option from the drop down menu will bring up the
reboot screen.
Figure 25: HygroGen2 Software Update and Settings
After rebooting, the configuration/update mode page will be displayed.
Figure 26: HygroGen2 Configuration/Update mode
At the end of the configuration/update process, press OK to reboot back into normal operation
mode.
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
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5.3.1 Date and Time Settings
Date and time stamps are included in AutoCal and HW4 logged data.
To change these settings, click the Date and Time button on the Update/Configuration page.
Figure 27: Date and Time Properties
5.3.2 Touch Screen Calibration
Pressing the touch screen button will begin a four point calibration. Press the cross in each corner of
the screen as directed.
6
HygroGen2 and HW4 Feature Upgrades and Software Updates
Feature upgrades and updates for HygroGen2 and HW4 software can be ordered from your
ROTRONIC dealer and are applied via a USB memory stick inserted into the rear USB ports of the
HygroGen2.
Applying HygroGen2 and HW4 updates requires the unit to reboot into update/configuration mode
(section 5.3). Select the Update option from the Settings screen and press OK to reboot.
After the restart, insert the USB memory stick containing the update and select the upgrade option
required.
Once the selection is made, the HygroGen2 will load the software and run through file structure
diagnostics before restarting. The diagnostics can take up to 15 minutes; under no circumstances
switch off the HygroGen2 during this process.
Once complete, the HygroGen2 will automatically restart and return the unit to its normal
operational state. For feature upgrades, a screen will appear requesting the appropriate activation
code.
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
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Servicing and Maintenance
7.1 Control HygroClip Calibration
To remove the control HygroClip for calibration, turn off the HygroGen2 auto Control and remove
the door. Reach into the chamber and unscrew the HygroClip from its mounting connector. Take
care not to cross the threads on the collar when refitting.
To minimise HygroGen2 downtime, alternative calibrated probes can be fitted in place of the
existing probe.
7.2 Desiccant
The HygroGen2 uses a desiccant when lowering humidity in the chamber. The
desiccant condition is shown within the Settings screen. This shows an approximate
indication of the dew point within the dryer cell.
If the HygroGen2 does not reach low RH set-points promptly, check the desiccant
condition and replace as required.
The measured desiccant value is established when the dryer is active and a flow of air
from the desiccant cell is passing over the desiccant sensor; this value is held when the
dryer is active to provide the user with an indication of the desiccant condition even if
the dryer is not used. To update the value, run the HygroGen2 on the lowest RH setpoint (5%rh) for at least 15 minutes.
Figure 28: Desiccant Condition
Changing Desiccant
Remove the desiccant cell from the HygroGen2 by pulling firmly on the cell cap (figure1,5). The cell is
held in place securely to maintain an air-tight seal; a gentle twist will help removal. Changing the
desiccant should be undertaken in a ventilated area.
Observing the diagram below, remove the cap and pour out the used desiccant material and replace
with new or regenerated material. Avoid exposing the replacement desiccant unduly to the
atmosphere.
Ensure that the cell is filled with as much desiccant as possible to ensure there are no air gaps.
Remember to replace the foam insert (that fits between the cell cap and the desiccant) before
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
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with AutoCal and Range Extension options.
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Document title
31 of 55
replacing the cell cap and spring clip. Application of silicone grease on the desiccant cell cap “O” ring
will help ease removal and refitting.
5a) Cell cap
5b) Retaining clip
5c) Cell body
Figure 29: Desiccant Cell
Caution: Do not use dusty desiccants as the dust may be passed into the chamber.
Choice of Desiccant
The HygroGen2 is supplied from the factory filled with molecular sieve desiccant. Molecular sieve is
preferred due to its higher performance in all temperature and humidity conditions, and is longer
lasting and can be regenerated through heating. Other desiccants including self-indicating silica gel
and drierite can be used if desired; for further information please contact hygrogen@rotronic.co.uk.
Dusty desiccants should be avoided as particles may be passed into the HygroGen2 chamber.
Replace or regenerate the desiccant whenever the drying performance of the HygroGen2 is
deteriorating.
Material Safety Sheets for the desiccants supplied by ROTRONIC are available on request.
Regeneration of Molecular Sieve Desiccant
To regenerate molecular sieve remove it from the desiccant cell and heat it at 175 °C for 3-5 hours in
a dry environment (do not use a gas oven). After heating, allow to cool in a dry or sealed
environment.
Performance of the regenerated desiccant can be measured in the HygroGen2 according to the
method described above. Alternatively, replacement new desiccant can be ordered from ROTRONIC.
Please contact your local dealer.
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroGen2: Humidity and Temperature Generator
with AutoCal and Range Extension options.
Instruction Manual
Document title
Instruction Manual for Software
Version 2.0.x
Document Type
Page
32 of 55
7.3 HygroGen2 Cleaning
Prior to cleaning, the unit should be disconnected from the electrical mains supply.
External surfaces
The external surfaces of the HygroGen2 may be cleaned with a lint-free cloth dampened with a mild
soap solution. Care must be taken not to allow fluids into any of the apertures on the unit. The fan
inlet filter can be cleaned using a vacuum cleaner to remove any particulates. The filter material is
replaced during servicing.
Chamber
Periodically it is recommended that the internal surfaces of the HygroGen2 chamber sleeve are
inspected and wiped clean of any visual residues using a lint-free cloth moistened with distilled
water. Care should be taken to avoid mechanical damage to the control probe and sampling tubes
inside the chamber.
Figure 30: HG2-S Chamber
Purging internal pipes
Some humidity instruments are used in environments where chemical contaminants may be
present. Should these transfer to the HygroGen2, this may result in drift of the RH control probe
which would become apparent during calibration. To purge the internal pipe work and chamber of
the HygroGen2, replace the desiccant with Granular Activate Charcoal (GAC) and run the unit at 40°C
and 5%rh for 6 hours. Any volatile compounds within the HygroGen2 will be absorbed into the GAC.
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroGen2: Humidity and Temperature Generator
with AutoCal and Range Extension options.
Instruction Manual
Document title
Instruction Manual for Software
Version 2.0.x
Document Type
Page
33 of 55
7.4 Annual Servicing of HygroGen2
The unit does not require routine user maintenance beyond that described in this Section.
For optimum performance ROTRONIC recommend that the HygroGen2 is serviced every 12 months at an
approved HygroGen2 service centre, details of which can be found in Appendix C2 of this manual.
Under no circumstance should the unit be opened by personnel unauthorised by the
manufacturer. Doing so will void the manufacturer’s warranty, and expose potentially
dangerous electrical hazards.
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroGen2 humidity and temperature generator:
Instruction Manual
Appendix
Document title
Instruction Manual for Software
Version 2.0.x
Document Type
Page
34 of 55
A1: Calibration Reference Options
Various calibration references can be used with the HygroGen2. These include the internal control
probe, other RH probes, dew point chilled mirrors and platinum resistance thermometers (PRTs).
For traceable calibration, these references are themselves calibrated by accredited laboratories
traceable to national standards.
For more information, please refer to The Guide to Uncertainty of Measurements (GUM) published
by the UK National Physical Laboratory (or equivalent national standards documentation) and
ISO/IEC 17025:2005 “General Requirements for the Competence of Testing and Calibration
Laboratories”.
Appendix D1 provides examples of uncertainty budgets for the HygroGen2 when using different
calibration references. These are for guidance only, and ROTRONIC accepts no liability in relation to
their use.
A1.1 Internal RH Probe Reference
The display values on the HygroGen2 (which are derived from the control probe - as described in
appendix A2) can be used as the reference.
Advantages:
•
•
•
•
•
No supplementary instruments are required.
Fastest response - control is based on the reference value.
Stability during calibration – the reference is continually optimising the control value.
The reference probe can be easily replaced with another calibrated probe.
HygroClip probes have the facility to be adjusted to agree with a calibration reference,
meaning no corrections of the HygroGen2 display value need to be made in routine use.
Disadvantages:
•
•
•
RH probes can drift over time, so regular checks need to be performed to achieve best
measurement capability and a larger drift component included in an overall uncertainty
calculation.
Probe characteristics such as hysteresis or temperature coefficients must be included within
the overall uncertainty budget.
RH probes are less accurate than chilled mirrors.
Using the internal probe as your reference provides the most convenient option, but routine checks
of the probe’s stability are required to ensure the quality of the calibration. Interim calibration
checks against a traceable reference (e.g. ROTRONIC non-saturated salt solutions) should be carried
out regularly and the results recorded in a probe calibration history.
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroGen2 humidity and temperature generator:
Instruction Manual
Appendix
Document title
Instruction Manual for Software
Version 2.0.x
Document Type
Page
35 of 55
Annual recalibration of the control probe by an accredited laboratory should be the minimum
calibration regime. Interim calibration checks in combination with the annual calibration results will
allow the key drift component of an uncertainty budget to be defined and documented.
A1.2 External RH Probe Reference
Any RH instrument placed through the HygroGen2 door can be used as the reference. This may be
desired if your quality system employs a particular RH probe with a long history. It may not be
desirable to adjust this probe and use it as the control probe – a separate adjusted control probe
may be more convenient.
The same disadvantages apply when using an external RH probe as a reference as when using the RH
control probe: i.e. accuracy, susceptibility to drift, hysteresis, regular calibration requirement.
A1.3 Chilled Mirror Reference
To reduce calibration uncertainty, a chilled mirror instrument can be employed as the reference.
This type of instrument is generally accepted as a secondary humidity transfer standard. Instruments
should be maintained with an accredited (ISO17025) calibration certificate. A chilled mirror can be
used to validate the HygroGen2 calibration before and after on-site calibration using the internal RH
probe as a reference.
Chilled mirrors measure “dew point“, which is a measure of water vapour concentration and is the
temperature at which dew will form on a surface. Relative humidity can be derived from this value
with a corresponding temperature measurement.
There are two types: an all-in-one probe which can be inserted through the HygroGen2 door, with
integrated PRT temperature probe, e.g. MBW 473 with RP2 measuring head,
and an external sampling head, for which the HygroGen2 external sample loop is employed (see
section below).
Figure 31: MBW RP2 Measuring Head
Advantages of chilled mirror references:
•
•
•
Best measurement capability.
Instruments do not drift significantly.
Operates over a broad range of humidity conditions.
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroGen2 humidity and temperature generator:
Instruction Manual
Appendix
Document title
Instruction Manual for Software
Version 2.0.x
Document Type
Page
36 of 55
Disadvantages:
•
•
•
•
•
Regular mirror cleaning is required to maintain best possible performance.
Mirror measuring heads generate heat when cooling the mirror. Certain older chilled mirror
probes fitted through the HygroGen2 door can introduce temperature gradients.
For dew points above ambient conditions, sample lines must be heated to avoid
condensation which can introduce instability.
Chilled mirrors may be more expensive to calibrate than RH probes.
Longer stabilisation time.
Without doubt, a chilled mirror reference can obtain the best possible calibration uncertainty, but
they do require a good level of user expertise to ensure the best possible results. Always follow the
chilled mirror manufacturer’s best practice recommendations and check the instrument’s
compatibility with the HygroGen2 operating specifications.
Practical Guidance - Chilled Mirror Reference
Depending on the conditions being measured, some chilled mirrors do require a longer time to
stabilise, sometimes up to 90 minutes.
Attention should be paid to the following:
•
•
•
some types of chilled mirror sensors have the tendency to over or under shoot, to “hunt”
and can be off-the-mark for quite a long period of time.
at values below freezing, the indications of chilled mirror instruments without a force frost
feature can be ambiguous; readings may correspond to either the dew point or the frost
point.
whenever measuring conditions result in a dew point that is higher than the laboratory
conditions, heat the entire external sample loop, including the sensor head. Heating is
required to avoid condensation.
For advice on choosing the most appropriate chilled mirror instrument please consult your
ROTRONIC dealer.
Chilled mirror probes
Chilled mirror probes of diameters up to 50mm can be directly fitted through the HygroGen2 door.
Depending on the diameter of the probe, a special adapter or custom HygroGen2 door may be
required, please contact your ROTRONIC dealer for guidance.
Chilled mirror probes are convenient for dew point ranges above ambient as they are immersed in
the conditions and therefore condensation in sample lines need not be considered.
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroGen2 humidity and temperature generator:
Instruction Manual
Appendix
Document title
Instruction Manual for Software
Version 2.0.x
Document Type
Page
37 of 55
Figure 32: RP2 Head fully inserted into HygroGen2 door
Make sure the mirror is positioned so that moving air within the chamber flows over the mirror
surface. Figure 32 shows an example where the mirror sample cell clears the internal edge of the
HygroGen2 door.
External sample loop operation
To use a HygroGen2 with a chilled mirror that has an external sampling head, connect via the heated
sample loop points on the back panel. The HygroGen2 sample ports and internal tubing are
automatically controlled to 5°C above the chamber temperature to eliminate the possibility of
condensation formation.
Figure 33: HygroGen2 sample Ports
The connecting lines to the mirror must also be heated if the set chamber conditions create a dew
point temperature higher than the ambient conditions. Make sure that your chilled mirror operating
capability is within the required range. For humidity values with a dew point below ambient
temperature, heated sample lines are not required.
Remove the blanking caps fitted to the sample loop Swagelok fittings and use nuts and olives to
connect the sample tubes from the chilled mirror. 6 mm OD FEP or stainless tubing should be used
to connect the sample loop out and return ports to the chilled mirror unit. If the mirror instrument
does not have a built-in pump, flow meter and regulator, we recommend including these in the
sample loop (after the mirror) to confirm the air flow rate required by the chilled mirror instrument
(typically 0.5l/min).
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroGen2 humidity and temperature generator:
Instruction Manual
Appendix
Document title
Caution:
Instruction Manual for Software
Version 2.0.x
Document Type
Page
38 of 55
When tightening or releasing the Swagelok connectors do not apply torque to the
nut/caps without using a spanner on the connector body to counteract it. Finger tighten
and then apply a quarter turn with a spanner.
Replace the blanking caps when not using the sample loop.
Figure 34: HygroGen2/Chilled Mirror Set
If the chilled mirror instrument is being used in conjunction with a thermometer (in order to
calculate relative humidity), the temperature probe should be positioned in the chamber. Care
should be taken to ensure that insertion depth and stem conduction effects do not induce
measurement errors.
A typical HygroGen2/Chilled Mirror set up is shown; note the heated sample lines to the rear.
Set the flow rate through the sample loop according the mirror instrument manufacturer‘s
specifications. A lower flow rate will improve stability criteria but may influence measurement
response time.
A2: Temperature Control
Temperature control within the HygroGen2 is performed by a fast response PT100 thermometer
which is continuously referenced against the HygroClip control probe. The chamber is not
considered stable (as indicated by the control indicator being coloured green) unless the reported
temperature values are within the resolution of the control HygroClip.
If a replacement HygroClip reference is put into the HygroGen2, and it gives a significantly different
temperature reading, it may take a while - roughly 20 minutes for every 0.1°C discrepancy - the first
time stability control is engaged, as the self-adjustment algorithm runs.
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroGen2 humidity and temperature generator:
Instruction Manual
Appendix
Instruction Manual for Software
Version 2.0.x
Document Type
Page
Document title
39 of 55
B1: HygroGen2 / Screen Messages
On Screen Message:
Fault/Action:
HygroClip NC
HygroClip not connected or faulty. Check and replace as required.
Contact service centre if message persists.
HygroClip error
Temperature or RH values are incorrect within the HygroGen2’s
programming. Remove Probe and check values. Replace if found to be
faulty. Contact service centre if message persists.
HygroClip communication; invalid data output. Check HygroClip and
replace. Contact service centre if message persists.
HC null data
Desiccant probe NC
Desiccant probe connection failure. Service centre repair only. Manual
control of desiccant condition enables use to continue.
Desiccant probe null data
Desiccant probe communication; invalid data output. Service centre
repair only. Manual control of desiccant condition enables work to
continue.
Check water level, empty and refill as required, see Section 2.4. If
message persists, manual control of water level allows use to continue
until next service
Water level is too high; fully empty and refill in accordance with
Section 2.4. Contact service centre if message persists.
Low Water level
High Water level
Humidification Disabled
Displays when temperature is changing. Wait for temperature to
stabilise.
Desiccant wet
Desiccant condition warning. Replace desiccant (Section 7.2).
Heating Disabled
Over temperature event. Heating shut down for safety reasons.
Contact service centre.
Sample Loop error
Temperature fault (sample loop temperature sensor or heater).
Operation can continue at dew points below ambient temperature.
Water Sensor error
Fault with level sensor. Manual supervision of water level allows use
to continue until next service.
UV error
UV Lamp failure. Contact service centre.
Service Due
More than 3000 hours in use since last service. Contact your service
centre to arrange for the HygroGen2 to be serviced.
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroGen2 humidity and temperature generator:
Instruction Manual
Appendix
Instruction Manual for Software
Version 2.0.x
Document Type
Page
Document title
40 of 55
B2: HygroGen2 Specification
HygroGen2 Specification
Control
Sensor
Control type
Range
(with Range Extension option/s)
Stability at equilibrium
Chamber temperature gradients
Generation method
Performance
Response time
Control probe specification
Typical calibration uncertainty
Standard Features
Water level
Water quality
Desiccant condition
USB ports
Reference connection
Programmer function
Mechanical & Electrical
Chamber volume
Power
Enclosure
Operating Conditions
Weight
CE
© 2012; Rotronic AG
Relative Humidity
Temperature
HygroClip2-S, capacitive RH sensor, Pt100 temperature sensor
Embedded multiple PID controller, touch screen graphical user
interface
5….95%rh
0…60°C
2...99%rh
-5...60°C
<0.1%rh
<0.01°C
<0.05°C (15…50 °C), <0.1°C (5…60°C), <0.15 (0...5°C)
Mixed flow with desiccant Peltier thermoelectric element
dryer cell and piezoelectric with radial chamber mixing fan
humidifier
3 minutes (35 to 80% change) 5 minutes (20 to 30°C change)
±0.8%rh(23°C ±5) ±2%rh ±0.1K (23°C ±5) ±0.3K (0…60°C)
(0…60°C)
±1.5%rh (k=2) at 23°C
±0.15°C (k=2) 15…50°C
Low and high alarm, bar graph status indication
UV sterilisation, auto time cycling
Condition monitored during control operation
7 front, 2 rear
Temperature controlled outlet and inlet, 6mm fittings
20 user program memory, up to 200 set-point changes per
program
2 litres, effective working volume 1.5 litres
110…240VAC 50/60Hz, 3A
Powder coated aluminium, IP20, 450 x 406 x 205mm (Max)
10-35°C
13 kg
Safety: EN 61010-1:2001
EMC: EN 61326-1:2006EN 61326-1:2006 &EN 61000-6-1:2007
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroGen2 humidity and temperature generator:
Instruction Manual
Appendix
Instruction Manual for Software
Version 2.0.x
Document Type
Page
Document title
41 of 55
B3: HygroGen2 Order Codes:
Order code:
HG2-S
Description
HygroGen2 with touch screen user interface, set-point control and
programmer function, heated sample loop, 1x desiccant cell, 1x fill syringe,
embedded HW4-P software. Order chamber door separately.
HG2-D-HFW
HG2-DP-00000
HG2-D-xxxxx
HG2-B1
HG2-B1-xx
HG2-B8
HG2-B8-xx
Doors & Fittings
HG2 door 5 x 15mm ports (for 5 HygroClip2-S) with 5 bungs, order specific B1
sleeves for smaller probe diameters
HG2 door 5 x 30mm ports with 5 bungs, order specific B8 sleeves to suit
smaller probe diameters
HygroGen2 probe door for HF3 &HF4 wall mount transmitters
HG2 clear acrylic door (no ports) for instruments with displays
HG2 fully custom door for > 30mm, see xx diameter codes below
15mm Bung
B1 probe sleeves (15mm external, internal probe diameter see xx codes below)
30mm Bung
B8 probe sleeve (30mm external, internal probe diameter see xx codes below)
HG2-DC
HG2-FILL
HG2-DES-3
Spares
Additional desiccant cell, pre-filled with molecular sieve
Fill tube and syringe
Molecular sieve desiccant (3kg)
HG2-D-11111
HG2-D-88888
HG2-TB
HG2-AC3001-L/050
HG2-AC3001-L/050(5)
AC3015
HG2-V2.X-UPGRADE
HG2-AutoCal-Code
HG2-TempExt-Code
HG2-HumiExt-Code
HG2-AutoC/RangeE-C
© 2012; Rotronic AG
Accessories
Transit bag, lightweight
HygroClip2 calibration cable, 50cm, USB
HygroClip2 calibration cable, 50cm, USB: Bundle of 5 pieces HG2-AC3001-L/050
Mini USB transfer cable, 30cm, with 90° coupling for transmitters with fixed
probe
Extended Features
HG2-V2.x Software and HW4-V3.x upgrade USB-stick
HG2 AutoCal function, licence code only
HG2 Temperature Extension -5…60 °C, licence code only
HG2 Humidity Extension 2…99 %RH, licence code only
HG2 AutoCal and Range Extension T/RH bundle, licence code only
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
Instruction Manual for Software
Version 2.0.x
HygroGen2 humidity and temperature generator:
Instruction Manual
Appendix
Document Type
Page
Document title
42 of 55
xx probe diameter codes
0
1
2
3
4
5
6
7
8
9
A
B
C
D
15mm (HygroClip)
20mm
25mm
10mm
5mm
12mm
18mm
30mm
Cable gland to accept 9…17mm diameter probes
6mm
4mm
22mm
23mm
E
F
G
H
I
J
K
L
M
N
O
P
13mm
19mm
21mm
18.5mm (Vaisala HMP45AD)
18.2mm (Aanderaa 3445)
9mm
19.75mm (no '“O“ rings)
Cable gland to accept 3 - 7mm diameter probes
12.7mm
6.35mm (1/4 inch)
not used
3mm
© 2012; Rotronic AG
Q
R
S
T
U
V
W
X
Y
Z
-A1-A2-A3-A4-A5-A6-A7-A8-
not used
13.5mm
26mm
34mm
14mm
20mm cable gland
32mm cable gland
not used
15 mm angled Vaisala HMD
not used
24mm
12.5mm
24.7mm
General
Eastern
32mm
Chilled Mirror probe
16 mm
26.5 mm
36 mm
47 mm
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroGen2 humidity and temperature generator:
Instruction Manual
Appendix
Document title
Instruction Manual for Software
Version 2.0.x
Document Type
Page
43 of 55
C1: HygroGen2 Warranty Statement
ROTRONIC will grant a warranty for the HygroGen2 for a period of 12 months from the date of
delivery in respect of any evidenced faulty workmanship and materials. The warranty period is
extended by a further 12 months when the unit is serviced at a ROTRONIC approved service centre
12 months after the date of supply. Should the instrument be proven not to meet the published
specifications or to be contrary to contract upon inspection, the customer shall grant ROTRONIC the
opportunity hereunder of repairing the fault by returning the unit carriage paid to ROTRONIC.
Should the supply or delivery of any improvement or replacement not prove possible, the customer
may choose between having the purchase price reduced or in demanding the contract of sale to be
rescinded (conversion). Damage resulting from natural wear and tear, an act of God or non
compliance with the operating instructions shall be excluded from the warranty as well as
mechanical interference by the customer or by third parties with plant and equipment of ROTRONIC
without its written permission. No liability will be accepted for defects, damage or injury caused due
to installation not carried out in accordance with the manufacturer’s installation instructions.
The instrument maintains a record of the usage and this may only be reset by an authorised service
centre; this will determine the warranty period granted.
Figure 35: HygroGen Information
© 2012; Rotronic AG
E-M-HG2-S-V2.0
E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroGen2 humidity and temperature generator:
Instruction Manual
Appendix
Instruction Manual for Software
Version 2.0.x
Document Type
Page
Document title
44 of 55
C2: Manufacturer & Service Centre Contact Information
Manufacturer/UK Service
Centre :
Rotronic Instruments (UK) Ltd
Crompton Fields
Crompton Way
Crawley RH10 9EE
United Kingdom
Phone : +44(0)1293 571000
Fax : +44(0)1293 571008
www.rotronic.co.uk
instruments@rotronic.co.uk
Switzerland Service Centre:
Rotronic AG
Grindelstrasse 6
CH-8303
Bassersdorf
Switzerland
Phone +41 1 838 1144
Fax +41 1 837 0073
www.rotronic.ch
humidity@rotronic.ch
USA Service Centre:
Rotronic Instrument Corp.
Suite 150
135 Engineers Road
Hauppauge, NY 11788,
USA
Phone +1 631 427 38 98
Fax +1 631 427 39 02
sales@rotronic-sa.com
www.rotronic-usa.com
Germany Service Centre :
France Service Centre:
China Service Centre:
Rotronic Messgeräte GmbH
Einsteinstrasse 17-23
76275 Ettlingen
Deutschland
Rotronic s.a.r.l.
56, bd de Courcerin,
F-77183 Croissy Beaubourg
France
info@rotronic.de
www.rotronic.de
humidite@rotronic.fr
www.rotronic.fr
Rotronic Shanghai
Representative Office
2B,Zao Fong Universe Building
No.1800 Zhong Shan West Road,
200233 Shanghai
China
Phone +49 7243 383 250
Fax +49 7243 383 260
Phone +33 160 95 07 10
Fax +33 160 17 12 56
© 2012; Rotronic AG
info@rotronic.cn
www.rotronic.cn
Phone +86 40 08162018
Fax +86 10 82254374
E-M-HG2-S-V2.0
D1: HygroGen2 Uncertainty Framework - Internal RH Probe
Input values:
Temperature sensitivity
23
4.96
°C
80
% RH
% RH/deg C
Reference
Uncertainty source
Distribution
Value
Units
Sensitivity
Equiv RH
Divisor
One SD
Squares
1
2
3
4
5
6
7
8
9
10
11
12
Uncertainty of reference probe
Repeatability of humidity
Reference drift
Reference resolution
Chamber temperature gradients
Temperature stabilisation
Repeatability of temperature
Humidity stabilisation
Humidity fluctuations
Instrument Under Test (IUT) Resolution
Standard deviation of Ref readings
Standard deviation of IUT readings
normal
normal
rectangular
rectangular
rectangular
rectangular
normal
rectangular
rectangular
rectangular
normal
normal
0.900000
0.100000
1.000000
0.050000
0.020000
0.005000
0.050000
0.050000
0.050000
0.050000
0.050000
0.100000
%rh
%rh
%rh
%rh
°C
°C
°C
%rh
% RH
% RH
%rh
%rh
1.000000
1.000000
1.000000
1.000000
4.960000
4.960000
4.960000
1.000000
1.000000
1.000000
1.000000
1.000000
0.900000
0.100000
1.000000
0.050000
0.099200
0.024800
0.248000
0.050000
0.050000
0.050000
0.050000
0.100000
2.00
1.00
1.73
1.73
1.73
1.73
1.00
1.73
1.73
1.00
1.00
1.00
0.450
0.100
0.577
0.029
0.057
0.014
0.248
0.029
0.029
0.050
0.050
0.100
0.203
0.010
0.333
0.001
0.003
0.000
0.062
0.001
0.001
0.003
0.003
0.010
Reference
1
2
3
4
5
6
7
8
9
10
11
12
From calibration certificate - check uncertainty at input
values
From Standard Deviation of 10 repeated calibration runs
Drift between two successive calibrations of the reference
instrument
Resolution from manufacturer’s specification
Measured temperature gradients from the ROTRONIC
HygroGen2 Service
Measured stability from the ROTRONIC HygroGen2 Service
From Standard Deviation of 10 repeated calibration runs
Resolution of ROTRONIC HygroGen2 Control Clip
Resolution of ROTRONIC HygroGen2 Control Clip
Resolution from manufacturer’s specification
Standard Deviation of Ref readings during calibration
Standard Deviation of IUT readings during calibration
Sum of squares
Standard uncertainty (√sum of
squares)
Expanded uncertainty (95 %
confidence)
0.63
0.793
1.59
D2: HygroGen2 Uncertainty Framework - External RH Probe
Input values:
Temperature sensitivity
23
°C
4.96 % RH/deg C
80
% RH
Reference Uncertainty source
Distribution
Value
Units
Sensitivity
Equiv RH Divisor
1
2
3
4
5
6
7
8
9
10
11
12
13
normal
normal
rectangular
rectangular
rectangular
rectangular
rectangular
normal
rectangular
rectangular
rectangular
normal
normal
0.900000
0.100000
1.000000
0.050000
0.020000
0.100000
0.005000
0.050000
0.050000
0.050000
0.050000
0.050000
0.100000
%rh
%rh
%rh
%rh
°C
°C
°C
°C
%rh
% RH
% RH
%rh
%rh
1.000000
1.000000
1.000000
1.000000
4.960000
4.960000
4.960000
4.960000
1.000000
1.000000
1.000000
1.000000
1.000000
0.900000
0.100000
1.000000
0.050000
0.099200
0.496000
0.024800
0.248000
0.050000
0.050000
0.050000
0.050000
0.100000
Uncertainty of reference probe
Repeatability of humidity
Reference drift
Reference resolution
Chamber temperature gradients
Gradients through probe stem
Temperature stabilisation
Repeatability of temperature
Humidity stabilisation
Humidity fluctuations
Instrument Under Test (IUT) Resolution
Standard deviation of Ref readings
Standard deviation of IUT readings
Reference
1
2
3
4
5
6
7
8
9
10
11
12
13
From calibration certificate - check uncertainty at input values
From Standard Deviation of 10 repeated calibration runs
Drift between two successive calibrations of the reference instrument
Resolution from manufacturer‘s specification
Measured temperature gradients from the ROTRONIC HygroGen2 Service
Stem conduction
Measured stability from the ROTRONIC HygroGen2 Service
From Standard Deviation of 10 repeated calibration runs
Resolution of ROTRONIC HygroGen2 Control Clip
Resolution of ROTRONIC HygroGen2 Control Clip
Resolution from manufacturer‘s specification
Standard Deviation of Ref readings during calibration
Standard Deviation of IUT readings during calibration
2.00
1.00
1.73
1.73
1.73
1.73
1.73
1.00
1.73
1.73
1.00
1.00
1.00
One SD
Squares
0.450
0.100
0.577
0.029
0.057
0.286
0.014
0.248
0.029
0.029
0.050
0.050
0.100
0.203
0.010
0.333
0.001
0.003
0.082
0.000
0.062
0.001
0.001
0.003
0.003
0.010
Sum of squares
0.71
Standard uncertainty (√sum of squares)
Expanded uncertainty (95 % confidence)
0.843
1.69
D3: HygroGen2 Uncertainty Framework - Chilled Mirror Reference
Temperature sensitivity
23
3.1
°C
% RH/deg C
50
% RH
Reference
Uncertainty source
Distribution
Value
Units
Sensitivity
Equiv RH
Divisor
One SD
Squares
1
2
3
4
5
6
7
8
9
10
Uncertainty of chilled mirror reference
Repeatability of humidity
Chamber temperature gradients
Temperature stabilisation
Repeatability of temperature
Humidity stabilisation
Humidity fluctuations
Instrument under test (IUT) resolution
Standard deviation of Ref readings
Standard deviation of IUT readings
normal
normal
rectangular
rectangular
normal
rectangular
rectangular
rectangular
normal
normal
0.200000
0.100000
0.020000
0.005000
0.050000
0.050000
0.050000
0.050000
0.050000
0.100000
°C
%rh
°C
°C
°C
%rh
% RH
% RH
%rh
%rh
3.100000
1.000000
3.100000
3.100000
3.100000
1.000000
1.000000
1.000000
1.000000
1.000000
0.620000
0.100000
0.062000
0.015500
0.155000
0.050000
0.050000
0.050000
0.050000
0.100000
2.00
1.00
1.73
1.73
1.00
1.73
1.73
1.00
1.00
1.00
0.310
0.100
0.036
0.009
0.155
0.029
0.029
0.050
0.050
0.100
0.096
0.010
0.001
0.000
0.024
0.001
0.001
0.003
0.003
0.010
Reference
1
2
3
4
5
6
7
8
9
10
See sheet Dew Point UA
From Standard Deviation of 10 repeated calibration runs
Measured temperature gradients from the ROTRONIC HygroGen2 Service
Measured stability from the ROTRONIC HygroGen2 Service
From Standard Deviation of 10 repeated calibration runs
Resolution of ROTRONIC HygroGen2 Control Clip
Resolution of ROTRONIC HygroGen2 Control Clip
Resolution from manufacturer’s specification
Standard Deviation of Ref readings during calibration
Standard Deviation of IUT readings during calibration
Sum of squares
0.15
Standard uncertainty (√sum of squares)
Expanded uncertainty (95 % confidence)
0.385
0.77
D4: Dew Point Uncertainty Analysis
Dew Point Temperature
Reference
1
2
3
4
5
6
9
Uncertainty source
Calibration of Standard
Drift of Standard
Repeatability
Mirror Contamination
Mirror Temperature Fluctuations
Temp Gradients Across the Mirror/Condensate
Standard Deviation of Readings
Distribution
normal
rectangular
normal
rectangular
rectangular
rectangular
normal
Value
0.1
0.1
0.05
0.05
0.05
0.01
0.01
-5 to +35
Units
°Cdp
°Cdp
°Cdp
°Cdp
°Cdp
°Cdp
°Cdp
Sensitivity
1
1
1
1
1
1
1
°Cdp
Equiv °Cdp
0.10
0.10
0.05
0.05
0.05
0.01
0.01
Divisor
2.00
1.73
1.00
1.73
1.73
1.73
1.00
One SD
0.050
0.058
0.050
0.029
0.029
0.006
0.010
Squares
0.00250
0.00333
0.00250
0.00083
0.00083
0.00003
0.00010
Sum of squares
0.01
Standard uncertainty (√sum of squares)
Expanded uncertainty (95 % confidence)
0.101
0.20
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