Michell Instruments HygroCal100 Operating Manual
HygroCal100
Humidity Validator
User’s Manual
97500 Issue 1
September 2015
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HygroCal100
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© 2015 Michell Instruments
This document is the property of Michell Instruments Ltd. and may not be copied or
otherwise reproduced, communicated in any way to third parties, nor stored in any Data
Processing System without the express written authorization of Michell Instruments Ltd.
HygroCal100 User’s Manual
Contents
Safety ...............................................................................................................................vii
Electrical Safety ..........................................................................................................vii
Toxic Materials ............................................................................................................vii
Repair and Maintenance ..............................................................................................vii
Calibration ..................................................................................................................vii
Safety Conformity .......................................................................................................vii
Abbreviations .................................................................................................................... viii
Warnings .......................................................................................................................... viii
1 INTRODUCTION ................................................................................................1
1.1 Operating Principle ............................................................................................. 1
2 INSTALLATION ..................................................................................................2
2.1 Unpacking .......................................................................................................... 2
2.2 Operating Requirements ..................................................................................... 3
2.2.1 Environmental Requirements ......................................................................... 3
2.2.2 Electrical Requirements ................................................................................. 3
2.3 Exterior Layout ................................................................................................... 4
2.4 Rear Panel Layout .............................................................................................. 7
2.4.1 Probe Input Connections ............................................................................... 7
2.4.2 USB Communications Port ............................................................................. 8
2.4.3 Service Access Port ....................................................................................... 8
2.4.4 Power Adaptor Input ..................................................................................... 9
2.5 Top Panel Layout ................................................................................................ 9
2.5.1 Probe Ports ................................................................................................... 9
2.5.2 Desiccant Reservoir ..................................................................................... 10
2.5.3 Saturator Reservoir .................................................................................... 10
3 OPERATION ....................................................................................................11
3.1 General Operational Information ........................................................................ 11
3.2 Display ............................................................................................................ 11
3.3 Main Screen Layout .......................................................................................... 12
3.4 Menu Structure ................................................................................................ 13
3.4.1 Current Set Point ........................................................................................ 14
3.4.2 Probe Selection ........................................................................................... 14
3.4.3 Operational Status Display ........................................................................... 14
3.4.4 Calibration Settings ..................................................................................... 15
3.4.4.1 Mode ................................................................................................... 15
3.4.4.2 Probes ................................................................................................. 16
3.4.4.3 Program ............................................................................................... 17
3.4.4.4 Logging ................................................................................................ 18
3.4.4.5 Reference Setup ................................................................................... 20
3.4.5 System Settings .......................................................................................... 21
3.4.5.1 Display ................................................................................................. 21
3.4.5.2 Clock .................................................................................................... 22
3.4.5.3 About ................................................................................................... 23
3.4.5.4 Correct ................................................................................................. 23
3.4.6 Table View .................................................................................................. 24
3.5 Port Adaptors ................................................................................................... 25
3.6 Probe Installation ............................................................................................. 25
3.6.1 Chamber Connection ................................................................................... 25
3.6.2 Electrical Connection ................................................................................... 26
3.7 Battery Operation ............................................................................................. 27
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HygroCal100 User’s Manual
3.8 Operating Guide ............................................................................................... 27
3.8.1 Manual Mode .............................................................................................. 27
3.8.2 Automatic Mode .......................................................................................... 28
3.9 Operating Practice ............................................................................................ 29
3.9.1 Humidity Stabilization Times ........................................................................ 30
3.9.2 Data Logging .............................................................................................. 30
3.10 Standby Mode .................................................................................................. 30
3.11 External Reference Conguration ....................................................................... 30
4 MAINTENANCE ................................................................................................31
4.1 Desiccant Reservoir ......................................................................................... 31
4.2 Saturator Reservoir .......................................................................................... 32
4.3 Replacing the Internal Reference Sensor ............................................................ 32
4.4 Calibration Correction ....................................................................................... 33
Tables
Table 1 Operation Mode Screen Parameters ............................................................15
Table 2 Probe Setup Screen Parameters .................................................................. 16
Table 3 HygroCal100 Logging Screen Parameters ....................................................18
Table 4 RH Reference Setup Screen Parameters ...................................................... 20
Table 5 Display Settings Screen Parameters ............................................................ 21
Table 6 Clock Settings Screen Parameters ............................................................... 22
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HygroCal100 User’s Manual
Figures
Figure 1 Front Panel ................................................................................................4
Figure 2 Top Panel ...................................................................................................5
Figure 3 Rear Panel .................................................................................................6
Figure 4 Probe Input Connections .............................................................................7
Figure 5 USB Communications Port ...........................................................................8
Figure 6 Service Access Port .....................................................................................8
Figure 7 Power Adaptor Input ..................................................................................9
Figure 8 Probe Ports ................................................................................................9
Figure 9 Desiccant Reservoir ..................................................................................10
Figure 10 Saturator Reservoir ...................................................................................10
Figure 11 Main Screen .............................................................................................11
Figure 12 Main Screen Layout ..................................................................................12
Figure 13 Set Point Entry Screen ..............................................................................14
Figure 14 Calibration Settings Screen ........................................................................15
Figure 15 Operation Mode Screen .............................................................................15
Figure 16 Probe Setup Screen ..................................................................................16
Figure 17 Program Calibration Routine Screen ...........................................................17
Figure 18 HygroCal100 Logging Screen .....................................................................18
Figure 19 Log Files Screen .......................................................................................19
Figure 20 RH Reference Setup Screen .......................................................................20
Figure 21 System Settings Screen .............................................................................21
Figure 22 Display Settings Screen .............................................................................21
Figure 23 Clock Settings Screen ...............................................................................22
Figure 24 About Screen ...........................................................................................23
Figure 25 Calibration Correction Screen ....................................................................23
Figure 26 Calibration in Progress Screen ...................................................................24
Figure 27 Port Adaptor ............................................................................................25
Figure 28 Port Adaptor Tool .....................................................................................25
Figure 29 Set Point Entry Screen ..............................................................................27
Figure 30 Example of Calibration Routine ..................................................................28
Figure 31 Visualization of Calibration Routine ............................................................28
Figure 32 Calibration Correction Setup Screen ...........................................................33
Figure 33 Calibration Correction Screen ....................................................................34
Appendices
Appendix A Technical Specications ..............................................................................36
Appendix B Troubleshooting.........................................................................................38
Appendix C EU Declaration of Conformity......................................................................40
Appendix D Quality, Recycling & Warranty Information ...................................................42
D.1 Pressure Equipment Directive (PED) 97/23/EC ............................... 42
D.2 Recycling Policy .......................................................................... 42
D.3 WEEE Compliance ........................................................................ 42
D.4 RoHS2 Compliance ......................................................................43
D.5 Warranty ..................................................................................... 43
D.6 REACH Compliance ...................................................................... 44
D.7 Return Policy ...............................................................................44
D.8 Calibration Facilities .....................................................................45
D.9 Manufacturing Quality .................................................................. 45
D.10 FCC (EMC Requirements for North America) ..................................45
Appendix E Return Document & Decontamination Declaration ........................................ 47
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HygroCal100 User’s Manual
Safety
The manufacturer has designed this equipment to be safe when operated using the procedures
detailed in this manual. The user must not use this equipment for any other purpose than that
stated. Do not apply values greater than the maximum value stated.
This manual contains operating and safety instructions, which must be followed to ensure the safe
operation and to maintain the equipment in a safe condition. The safety instructions are either
warnings or cautions issued to protect the user and the equipment from injury or damage. Use
qualied personnel and good engineering practice for all procedures in this manual.
Electrical Safety
The instrument is designed to be completely safe when used with options and accessories supplied by
the manufacturer for use with the instrument. The input power supply voltage is limited to 24 V DC.
Toxic Materials
The use of hazardous materials in the construction of this instrument has been minimized. During
normal operation it is not possible for the user to come into contact with any hazardous substance
which might be employed in the construction of the instrument. Care should, however, be exercised
during maintenance and the disposal of certain parts.
Repair and Maintenance
The instrument must be maintained either by the manufacturer or an accredited service agent. Refer
to www.michell.com for details of Michell Instruments’ worldwide ofces contact information.
Calibration
The recommended calibration interval for the HS3 control sensor is one year, unless otherwise
specied by Michell Instruments Ltd. The instrument should be returned to the manufacturer, Michell
Instruments, or one of their accredited service agents for re-calibration (go to www.michell.com for
contact information).
Safety Conformity
This product meets the essential protection requirements of the relevant EU directives.
Michell Instruments vii
Abbreviations
!
DANGER
Electric
Shock Risk
The following abbreviations may or may not be used in this manual:
AC alternating current
atm pressure unit (atmosphere)
bar pressure unit (=100 kP or 0.987 atm)
°C degrees Celsius
°F degrees Fahrenheit
COM common
dp dew point
EU European Union
HMI Human Machine Interface
Hz Hertz
IEC International Electrotechnical Commission
Nl/min normal liters per minute
lb pound
mA milliampere
mAh milliampere hour
max maximum
min minute(s)
mV millivolt(s)
N/C normally closed
N/O normally open
No number
PRT Platinum resistance thermometer (typically type Pt100)
psig pound(s) per square inch (gauge)
rh relative humidity
RTU Remote Terminal Unit
scfh standard cubic feet per hour
SD storage device card (memory card for storing datalog les)
sec second(s)
temp temperature
USB Universal Serial Bus
V Volts
HygroCal100 User’s Manual
Warnings
The following general warnings listed below are applicable to this instrument. They are
repeated in the text in the appropriate locations.
Where this hazard warning symbol appears in the following
sections, it is used to indicate areas where potentially hazardous
operations need to be carried out.
Where this symbol appears in the following sections it is used to
indicate areas of potential risk of electric shock.
viii 97500 Issue 1, September 2015
HygroCal100 User’s Manual
1 INTRODUCTION
The HygroCal100 Portable Humidity Validator enables quick and convenient generation
of a known humidity condition at ambient temperatures.
The chamber allows seven relative humidity probes of various diameters to be installed
into the chamber simultaneously. The probes can be powered directly from the
HygroCal100, and monitored via the intuitive touch screen user interface.
This interface also allows the programming of a calibration prole, so that a series of
humidity values can be generated and held automatically for a set time period. The
readings from all probes under test and the built-in reference can also be logged for
completely autonomous operation.
1.1 Operating Principle
INTRODUCTION
The Validator operates on a divided ow mixing principle. The main calibration chamber
is supplemented by two reservoirs, once of which contains desiccant, the other contains
a saturator, which consists of a small quantity of distilled water and a diffuser.
A pump draws ambient air into the system, which is directed either to the desiccant or
saturator reservoir by a 2-way valve. When owing through the desiccant, moisture is
removed from the air; when owing through the saturator, moisture is added to almost
completely saturate it at the prevailing temperature.
A Michell Instruments' Hygrosmart 3 control sensor is installed inside the calibration
chamber, continually measuring the temperature and relative humidity inside. When a
target humidity level is set via the user interface, the control system uses the reading of
the HS3 control sensor to determine whether to add humid air or dry air to the chamber
in order to reach the desired level. When the reading of the HS3 is equal to that of the
target set point, the system alternates between injections of dry and wet air to maintain
a constant humidity condition in the chamber.
Michell Instruments 1
INSTALLATION
2 INSTALLATION
2.1 Unpacking
Open the box and unpack carefully as follows
1. Remove the carry case from the packing box.
HygroCal100 User’s Manual
2. Open the carry case.
3. Remove the instrument and place on a level surface.
Save all the packing materials for the purpose of returning the instrument for recalibration
or any warranty claims.
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HygroCal100 User’s Manual
The carry case should contain the following items:
• Control sensor calibration certicate
• Power adaptor
• User manual
• Port adaptor tool
• Spare Port adaptors (optional)
• Desiccant and water bottles (optional)
If there are any shortages please notify Michell Instruments immediately.
If Calibration Kit 1 or 2 has been ordered, then a separate box will also be supplied
containing the reference instrument (either an MDM25 or Optidew Vision). The specic
port adaptors for the reference will be in the carry case with any other spare port
adaptors ordered.
INSTALLATION
2.2 Operating Requirements
2.2.1 Environmental Requirements
It is important to operate the HygroCal100 within the following environmental conditions:
Minimum operating temperature +5°C (+41°F)
Maximum operating temperature +40°C (+104°F)
Maximum relative humidity 95%
2.2.2 Electrical Requirements
The power adaptor for the HygroCal100 requires the following electrical supply:
100 to 240 V AC, 50/60 Hz
Michell Instruments 3
INSTALLATION
2.3 Exterior Layout
The controls, indicators and connectors associated with the HygroCal100 are located on
the front, top and rear panels of the device.
Front Panel
HygroCal100 User’s Manual
1 2
1 USB port
2 Touch screen display
Figure 1
Accepts a USB memory device for the transfer of logged
data (see Section 3.4.4.4 for instructions on how to
download logged data).
Displays measured readings and enables the user to
control the operation of the chamber.
Front Panel
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HygroCal100 User’s Manual
Top Panel
INSTALLATION
1
3
2
1 Saturator reservoir
2 Probe ports
3 Desiccant reservoir
Figure 2
Contains a diffuser and distilled water used to humidify the
air in the chamber (see Section 4.2 for instructions on how
to rell the saturator).
Used to mount probes under test into the chamber (see
Section 2.5.1 for instructions on how to install port adaptors
and probes).
Contains desiccant used to dry the air in the chamber (see
Section 4.1 for instructions on how to replace desiccant).
Top Panel
Michell Instruments 5
INSTALLATION
Rear Panel
1
HygroCal100 User’s Manual
42 3
Figure 3
1 Probe input connections
USB communications
2
port
3 Service access port
4 Power adaptor input 24 V DC input.
Connections for probes under test (see Section 2.5.1 for
instructions on how to connect probes).
Allows the HygroCal to be connected to a PC, outputting
the relative humidity and temperature values of both the
reference probes and the probes under test.
Remove for replacement of HS3 control probe (see
Section 4.3 for instructions on how to replace the control
probe).
Rear Panel
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!
2.4 Rear Panel Layout
These tasks should only be undertaken by qualied personnel.
Connections to the rear panel of the chamber are explained in the following sections:
2.4.1 Probe Input Connections
Seven 8-pin connectors are provided to allow connection of probes under test. Probes
with a voltage or current input can be connected.
INSTALLATION
1 2 3 4 5 6 7
Probe Input Connector Pins
1 +24 V DC supply
2 Ground
3 RH voltage input
4 Temperature voltage input
5 RH current input
6 Temperature current input
7 Not connected
8 Not connected
Figure 4
Probe Input Connections
Michell Instruments 7
INSTALLATION
1 2 3 4 5 6 7
2.4.2 USB Communications Port
The USB type-B connector on the rear panel allows the HygroCal to be connected to
a PC, outputting the relative humidity and temperature values of both the reference
probes and the probes under test.
HygroCal100 User’s Manual
Figure 5
When connecting the port to a PC, the device will be installed as a virtual serial port,
and assigned its own COM port number, allowing communication with many different
engineering programs and programming languages.
The output will be in the following format:
InternalReferenceRH Probe1RH Probe2RH Probe3RH Probe4RH Probe5RH Probe6RH Probe7RH
InternalReferenceTP Probe1TP Probe2TP Probe3TP Probe4TP Probe5TP Probe6TP Probe7TP
0100 0114 FFFF 0115 FFFF FFFF FFFF FFFF 00E9 00E4 FFFF 00E3 FFFF FFFF FFFF FFFF
Each 2 byte hex word is a 16 bit unsigned integer, which should be divided by 10 to give
the actual decimal value of the associated reading.
e.g. Internal Reference RH value 0x0100 = 256. Dividing this value by 10 gives the
%RH value 25.6%
USB Communications Port
2.4.3 Service Access Port
The service access port has a cover which can be removed to access the HS3 control
sensor for replacement (see replacement instructions in Section 4.3).
The cover is held in place by two at-head screws.
Figure 6
Service Access Port
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2.4.4 Power Adaptor Input
The DC power connector is a push t into the power input socket, as shown in gure X.
The method of connection is as follows:
1. Ensure that both ends of the power cable are potential free, i.e. not
connected to an AC power supply.
2. Check that the ON/OFF switch is switched to OFF.
3. Push the connector into the power input socket.
4. Connect the mains plug of the power adaptor to a suitable AC power
source (voltage range 100 to 240 V AC, 50/60 Hz) and switch on the AC
supply.
5. Switch on the instrument, as required, using the power ON switch.
INSTALLATION
2.5 Top Panel Layout
2.5.1 Probe Ports
Seven ports are provided for the installation of probes under test. Each port is tted
with an adaptor, which allows the probe to be sealed into the chamber by means of an
O-ring.
Figure 7
24V DC
Power Adaptor Input
Figure 8
Adaptors are available with a wide variety of port sizes, from 12 to 25mm.
To install a port adaptor, locate the port adaptor removal tool (A000265) in the pin holes
on each adaptor, and unscrew or tighten the adaptor into the port. Take care not to
crossthread the adaptors.
To install a probe, simply t the correct size of port adaptor, remove the blanking plug,
and push the probe straight through the center of the adaptor until the O-ring grips the
probe shaft at its widest point. Ensure that any ports not in use are blanked off with
the appropriate plug.
Probe Ports
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