Rotronic HygroPalm HP23-A User manual

E
-M-HP23-V2_12
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroPalm HP23-A / HP23-AW-A hand-held
indicator:
User Guide
Instruction Manual
Document Type
Page
1
of 38
Document title
© 2009-2012; Rotronic AG E-M-HP23-V2_12
HygroPalm HP23-A / HP23-AW-A
Hand-Held Indicator
User Guide
QAQC LAB 589 Rappahannock Drive White Stone Va 22578 TEL [phone]

E
-M-HP23-V2_12
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroPalm HP23-A / HP23-AW-A hand-held
indicator:
User Guide
Instruction Manual
Document Type
Page
2
of 38
Document title
© 2009-2012; Rotronic AG E-M-HP23-V2_12
Table of contents
1 Overview......................................................................................................................................................4
2 General description....................................................................................................................................6
2.1 Configuration software ............................................................................................................................. 6
2.2 Power supply............................................................................................................................................ 6
2.3 Probe inputs ............................................................................................................................................. 6
2.4 Measured parameters .............................................................................................................................. 7
2.5 Calculated parameters ............................................................................................................................. 7
2.6 Alarm Indication on the display ................................................................................................................ 8
2.7 Real time clock......................................................................................................................................... 8
2.8 Service connector..................................................................................................................................... 8
3 User configurable settings and functions ................................................................................................8
3.1 Factory default settings ............................................................................................................................ 8
3.2 Interaction between the HP23 and HygroClip 2 probe functions .............................................................. 9
4 Basic operation.........................................................................................................................................11
4.1 Display ................................................................................................................................................... 11
4.1.1 Display modes........................................................................................................................ 11
4.1.2 Difference between Probe 1 and Probe 2 (Delta Probe) ........................................................ 12
4.1.3 User defined parameter.......................................................................................................... 12
4.2 Keypad ................................................................................................................................................... 12
4.3 ON/OFF key ........................................................................................................................................... 13
4.4 HOLD function........................................................................................................................................ 13
4.5 Internal menu ......................................................................................................................................... 13
4.6 Frequently used settings ........................................................................................................................ 18
4.6.1 Unit system ............................................................................................................................ 18
4.6.2 Date and time......................................................................................................................... 18
4.6.3 Select the calculated parameter for a probe input .................................................................. 18
4.6.4 Select which probe and/or parameters are shown on the display .......................................... 18
4.6.5 Set input 1 or 2 for a digital or analog probe .......................................................................... 19
4.7 Practical advice for measuring humidity ................................................................................................. 19
5 Using the HP23 functions ........................................................................................................................19
5.1 Data capture........................................................................................................................................... 19
5.1.1 Capturing data........................................................................................................................ 19
5.1.2 Viewing the captured data...................................................................................................... 20
5.2 Data logging ........................................................................................................................................... 21
5.2.1 Logging data .......................................................................................................................... 21
5.2.2 Viewing the recorded data...................................................................................................... 21
5.3 Calibrator function .................................................................................................................................. 22
5.3.1 Connecting a device to the HP23........................................................................................... 22
5.3.2 Reading measurement data ................................................................................................... 23
5.3.3 About the HP23 calibration and adjustment procedures ........................................................ 23
5.3.4 Calibration against a reference environment.......................................................................... 23
5.3.5 Calibration against a reference HygroClip 2 probe or other device ........................................ 24
5.3.6 Adjustment of humidity and temperature................................................................................ 24
5.4 Aw Mode (HP23-AW) ............................................................................................................................. 25
5.4.1 Enabling the Aw Mode and selecting the measurement function ........................................... 25
5.4.2 Probe usage guidelines.......................................................................................................... 26
5.4.3 Using the AwQuick function ................................................................................................... 27
5.4.4 Using the AwE function .......................................................................................................... 30
6 Maintenance..............................................................................................................................................32
6.1 Replacing the battery ............................................................................................................................. 32
6.2 Connecting the HP23 to a PC ................................................................................................................ 32
6.3 Location of the service connector (mini USB type)................................................................................. 32
QAQC LAB 589 Rappahannock Drive White Stone Va 22578 TEL [phone]

E
-M-HP23-V2_12
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroPalm HP23-A / HP23-AW-A hand-held
indicator:
User Guide
Instruction Manual
Document Type
Page
3
of 38
Document title
© 2009-2012; Rotronic AG E-M-HP23-V2_12
6.4 Periodic calibration check of the HygroClip 2 probe ............................................................................... 32
6.5 Cleaning or replacing the probe dust filter .............................................................................................. 34
7 Firmware updates.....................................................................................................................................34
8 Technical data...........................................................................................................................................34
8.1 Specifications ......................................................................................................................................... 34
8.2 Dew point accuracy................................................................................................................................ 36
9 Accessories...............................................................................................................................................36
10 Supporting documents.............................................................................................................................37
11 Document releases...................................................................................................................................38
QAQC LAB 589 Rappahannock Drive White Stone Va 22578 TEL [phone]

E
-M-HP23-V2_12
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroPalm HP23-A / HP23-AW-A hand-held
indicator:
User Guide
Instruction Manual
Document Type
Page
4
of 38
Document title
© 2009-2012; Rotronic AG E-M-HP23-V2_12
Applicability:
This manual is valid for the HP23 with firmware version 2.x, where 2.x can be 2.0, 2.1 etc. Changes to the last
digit of the version number reflect minor firmware changes that do not affect the manner in which the
instrument should be operated.
1 Overview
The HP23 is a multifunction hand-held indicator with data logging capability. The HP23 can be used in many
different applications such as the spot check measurement of HVAC installations and manufacturing
processes, the measurement of seeds, pharmaceutical powders and other materials in bulk, the measurement
of paper stacks and rolls, etc. The HP23 is also a calibrator that can be used to read and adjust other
instruments from ROTRONIC that are based on the AirChip 3000 technology.
Each of the two probe inputs can be configured to accept either a digital HygroClip 2 humidity -temperature
probes (factory default) or an analog probe measuring any signal such as barometric pressure, air velocity, etc
(user configuration). The HP23 has a real time clock to keep track of the date and time when recording data
and is powered with either a standard 9 V alkaline battery or with a rechargeable battery.
The HP23 features two distinct operating modes:
Standard Mode:in this mode the HP23 can be used as a general purpose indicator, as a data logger or
as a calibrator for verifying and adjusting other instruments from ROTRONIC. The standard mode offers the
following functionality (availability of some of the functions depends on the HP23 model):
Display of Measured and Calculated Values
oRelative humidity and temperature data measured by up to two HygroClip 2 digital probes
oCalculated humidity parameter such as dew / frost point or other, for up to two HygroClip 2
probes
oDifference between the values measured by two probes (the probes must be of the same type:
digital or analog)
oUp to two user defined calculations such as the difference between the temperature and the dew
point measured by a probe, the average of the temperature measured by two probes, etc.
oAny parameter measured by up to two analog probes (user defined)
Manual Data Capture
oTo facilitate the spot checking of humidity and temperature conditions, the HP23 features eight
data bins (non-volatile memory) each capable of retaining up to 250 humidity temperature values
measured by a HygroClip 2 probe (analog probe data is not recorded). Each record is stamped
for date and time. The data bins can be given a user defined name.
oProbe selection, bin selection, data capture and data viewing are done from the keypad.
Data Logging
oThe HP23 can automatically record up to 10,000 humidity-temperature value pairs measured by
a single HygroClip 2 probe or up to 10,000 values measured by a single 1-channel analog
probe. Each record is stamped for date and time. The calculated parameter (HygroClip 2 probe
only) cannot be recorded. When recording data from two probes at the same time, the recording
capacity per probe is cut in half.
oThe HP23 features two data logging mode: start-stop (recording ends when the memory is full)
and loop (when the memory is full, the oldest record is dumped to make room for a new record)
oExcept for the log file format, all log settings can be selected from the keypad. Data logging can
be started and stopped from the keypad
QAQC LAB 589 Rappahannock Drive White Stone Va 22578 TEL [phone]

E
-M-HP23-V2_12
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroPalm HP23-A / HP23-AW-A hand-held
indicator:
User Guide
Instruction Manual
Document Type
Page
5
of 38
Document title
© 2009-2012; Rotronic AG E-M-HP23-V2_12
oThe HW4 software is required to download and view the recorded data
Calibrator function:
The HP23 can be used as a calibrator for all of the ROTRONIC HygroClip 2 devices (probe,
transmitter or other) and allows to do the following:
oDisplay the measurement data from the device on the HP23.
o1-point humidity and/or temperature adjustment of the device connected to one of the HP23
probe inputs against the HygroClip 2 probe connected to second probe input of the HP23
(reference probe).
o1-point or multi-point humidity adjustment as well as a 1-point or 2-point temperature adjustment:
against a known reference environment.
Aw Mode:this specialized mode is available only with model HP23-AW and is used for measuring the
water activity (Aw) of product samples and materials in bulk such as powders, seeds, etc. When set to operate
in the water activity mode, the HP23 automatically displays humidity as Aw (1.000 aw= 100 %RH). The Aw
Mode offers the following options:
Accelerated water activity measurement (AwQuick): permits measuring the water activity of
most products in typically 5 minutes. The measurement starts simultaneously for both probe inputs
and is ended automatically.
Conventional water activity measurement (AwE): the measurement starts simultaneously
for both probe inputs. The HP23 automatically detects full equilibrium conditions and ends the
measurement at that time.
Data logging and probe adjustment are available in the water activity mode, but when using these functions
humidity is shown as %RH as opposed to aw. The other standard mode functions are not available.
The HP23 is available with a wide assortment of HygroClip 2 humidity-temperature probes to meet almost any
requirement. The HygroClip 2 probes feature well proven, durable sensors. Digital signal processing ensures
consistent product performance and also facilitates the task of field maintenance with features such as
potentiometer free digital calibration.
Depending on the probe model, the HP23 can measure conditions within the range of 0 to 100 %RH and -100
to 200 C (-148 to 392 F). The temperature operating range of the HP23 electronics is limited to -
The ability for the user to easily update both the HP23 and HygroClip 2 probe firmware means that the
indicator and probes can be kept up-to-date regarding any future functionality improvement.
QAQC LAB 589 Rappahannock Drive White Stone Va 22578 TEL [phone]

E
-M-HP23-V2_12
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroPalm HP23-A / HP23-AW-A hand-held
indicator:
User Guide
Instruction Manual
Document Type
Page
6
of 38
Document title
© 2009-2012; Rotronic AG E-M-HP23-V2_12
2 General description
2.1 Configuration software
Most of the HP23 settings can be configured directly from the keypad. However, some of the settings and
access to some of the functions requires connecting the HP23 to the USB port of a PC running the HW4
software version 3.0 or higher. For instructions see the following HW4 manual: E-M-HW4v3-F2-012
2.2 Power supply
The HP23 uses either a standard 9V alkaline battery (factory default) or a 9V rechargeable Ni-MH battery
(user configuration).
The rechargeable battery is charged either by connecting the service connector to a USB port or by plugging a
battery charger (part number AC1212) to the service connector. The typical charge current is 17 mA.
Important: the HP23 is shipped with a regular 9V battery and is factory preset with the battery charge
function turned off. If you plan on using a rechargeable battery, you should turn on the battery charge function
(see Function Menu Settings). Before using a regular battery again, be sure to turn off the battery charge
function. Trying to charge a regular battery may cause the battery to burst and may damage the instrument.
With the default display refresh rate is 1 second the probes are permanently powered. To conserve battery
power, the display refresh rate can be set from the HP23 keypad to one of the following: 10 sec, 1 min or 10
min. (MENU > Device Settings > DataUpdate). The autonomy of the HP23 with a fully charged battery
depends on factors such as the display backlight, the number of probes, the display refresh rate, the functions
being used, etc. As an indication, the typical current consumption is as follows: 6.5mA with 1 probe and 20mA
with 1 probe + backlight.
WARNING: the display refresh rate setting can affect the data logging function of both the HP23 and probe
2.3 Probe inputs
The HP23 has two probe inputs. Using the HW4 software (Device Manager), each probe input can be
configured to accept one of the following:
oHygroClip 2 humidity-temperature digital probe. Any input configured to accept a HygroClip 2 digital probe
can also be used to read and adjust an instrument or device that is based on the AirChip 3000 technology
(use service cable AC2001).
o1-channel analog probe (general): To be compatible with the HP23 the analog probe must meet the
following requirements: supply voltage: max. 5 VDC, current consumption: max. 10 mA, output signal: 0
to max. 3.3 VDC. The HP23 uses a 12-bit A/D converter to digitize the probe analog signal and can be
configured to measure practically any parameter.
oAnalog pressure probe: this is a special case of analog probe and is subject to the same compatibility
requirements. When analog pressure probe is selected, the HP23 automatically uses the signal from the
probe to calculate any humidity parameter that requires barometric pressure as an input value (example:
mixing ratio).
QAQC LAB 589 Rappahannock Drive White Stone Va 22578 TEL [phone]

E
-M-HP23-V2_12
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroPalm HP23-A / HP23-AW-A hand-held
indicator:
User Guide
Instruction Manual
Document Type
Page
7
of 38
Document title
© 2009-2012; Rotronic AG E-M-HP23-V2_12
Pin-Out Diagram
2.4 Measured parameters
Depending on the configuration of the probe inputs, the HP23 can measure the following:
oHygroClip 2 probe: humidity and temperature. The HC2 probes measure relative humidity with a
ROTRONIC Hygromer®IN1 capacitive sensor and temperature with a Pt100 RTD.
oAnalog probe (general): any parameter measured by the probe. The parameter unit must be
specified with the HW4 software (Device Manager).
oAnalog pressure probe: the unit used for barometric pressure is set with the HW4 software > Device
Manager > Unit System.
2.5 Calculated parameters
When a probe input is configured to accept a HygroClip 2 digital probe, the HP23 can calculate any of the
following parameters based on the humidity and temperature values measured by the probe (to select the
calculated parameter, use either the keypad or the HW4 software > Device Manager):
oDew point (Dp) above and below freezing
oFrost point (Fp) below freezing and dew point above freezing
oWet bulb temperature (Tw)
oEnthalpy (H)
oVapor concentration (Dv)
oSpecific humidity (Q)
oMixing ratio by weight (R)
oVapor concentration at saturation (Dvs)
oVapor partial pressure (E)
oVapor saturation pressure (Ew)
Note: calculating some of the above parameters requires barometric pressure as an input parameter. When
no pressure probe is connected to the HP23, a fixed barometric pressure value can be specified using either
the keypad or the ROTRONIC HW4 software.
In addition, the HP23 can display the difference between two probes or up to two user defined calculations
such as the difference between the temperature and the dew point measured by a probe, the average of the
temperature measured by two probes, etc. (see Display in this manual)
1: RXD (UART- digital probe)
2: GND (digital and power)
3: V+: digital pbe: 3.3 VDC nominal, analog pbe
: maximum 5.0 VDC, 10 mA
4: AGND (analog ground)
5: Not used
6: 1
-channel analog probe signal : + 0.0 to 3.3 VDC
7: TXD (UART digital probe)
QAQC LAB 589 Rappahannock Drive White Stone Va 22578 TEL [phone]

E
-M-HP23-V2_12
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroPalm HP23-A / HP23-AW-A hand-held
indicator:
User Guide
Instruction Manual
Document Type
Page
8
of 38
Document title
© 2009-2012; Rotronic AG E-M-HP23-V2_12
2.6 Alarm Indication on the display
Depending on the type of alarm, the display shows either a symbol or a text when the HP23 detects an alarm
condition:
oOut-of-limits value (defined with the HW4 software for each probe input, includes measured values
and calculated parameter).
oNo communication with the probe.
oDisplay of fixed values when no probe is connected the input. Easily identified humidity and
temperature values can be specified with the HW4 software for each probe input.
oBad RH sensor or major sensor failure (open or shorted sensor humidity and temperature)
oLow battery charge
2.7 Real time clock
The HP23 clock keeps track of the date and time and can be adjusted from the keypad. Using the HW4
software, the clock can be synchronized with the PC date and time. The clock does not automatically adjust
for daylight saving time (DST).
2.8 Service connector
The service connector of the HP23 is a USB port. Any standard cable equipped with a mini-USB type
connector at one end can be used to connect the HP23 to a PC running the ROTRONIC HW4 software. See
oConfiguration of the HP23
oDownloading data recorded on the HP23
oAccess to the HygroClip 2 probe functions
oFirmware updates
3 User configurable settings and functions
The HP23 can be used just as any conventional humidity and temperature indicator. Making use of the HP23
configurable settings and functions is entirely up to the user and the appropriate settings depend on the user
application. We have provided below a short description of the HP23 functions and also indicated the factory
default settings.
3.1 Factory default settings
Notes:
oConfiguration of the HP23 and probe by the user and access to its functions requires a PC with the
ROTRONIC HW4 software (version 3.0.0 or higher) installed. A standard USB cable with a mini-USB
connector at one end is used to connect the HP23 service connector to a USB port of the PC.
oSettings and functions that can also be accessed from the keypad are marked with the letter K(see also
Operation > Internal Menu).
HP23 Configurable Settings
Factory default
Device write protection
Disabled
RS-485 address
0
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E
-M-HP23-V2_12
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroPalm HP23-A / HP23-AW-A hand-held
indicator:
User Guide
Instruction Manual
Document Type
Page
9
of 38
Document title
© 2009-2012; Rotronic AG E-M-HP23-V2_12
HP23 Configurable Settings
Factory default
Device name
Instrument model
Fixed barometric pressure value
K
1013.25 hPa (29.92 In Hg or 14.70 PSI)
Display refresh rate
K
1 sec.
Battery type / Battery charge
K
Standard (non rechargeable)
Date and time
K
Time zone dependent
Unit system (Metric or English)
K
Metric, except USA: English
Date and time format, date separator
K
European format (except North America)
Input configuration
HygroClip 2 digital probe
Input name
Probe 1 or Probe 2
Psychrometric calculation for the input
K
No calculation
Display backlight
K
On Key Press
Displayed parameters / display mode
K
%RH and temperature + date and time
Display resolution
K
1 decimal
Trend indicator (display)
K
Enabled
Menu access from keypad
Enabled
Delta Probe / User Defined Parameter
K
Disabled
Humidity / temperature calibration
K
Enabled
Humidity / temperature adjustment
K
Enabled
Manual data capture
K
Enabled
Data Logging
K
Disabled
Aw Mode (water activity measurement)
K
Disabled
Device write protection
Disabled
Out-of-limit values alarm
Disabled
Monitor sensor alarms
Enabled (this function cannot be disabled)
Loss of communication with probe alarm
Disabled
Simulator mode (fixed values)
Disabled
For a detailed description of all HygroClip 2 probe (AirChip 3000) functions see document
E-T-AC3000-DF-V1
Instructions regarding the configuration of the HP23 and probes as well as access to the functions are
provided in the following manuals:
E-M-HW4v3-F2-012
E-M-HW4v3-F2-001
E-M-HW4v3-Main (§ 6.5)
E-M-HW4v3-DR-001
E-M-HW4v3-A2-001
E-M-AC3000-CP
3.2 Interaction between the HP23 and HygroClip 2 probe functions
It is important to note that when used together, the HP23 indicator and HC2 probe (HygroClip 2) constitute a
2-component system. Each system component has its own microprocessor, firmware and functions. Some of
these functions are unique to each system component. Other functions are found in both components.
QAQC LAB 589 Rappahannock Drive White Stone Va 22578 TEL [phone]

E
-M-HP23-V2_12
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroPalm HP23-A / HP23-AW-A hand-held
indicator:
User Guide
Instruction Manual
Document Type
Page
10
of 38
Document title
© 2009-2012; Rotronic AG E-M-HP23-V2_12
The functions and settings of the HP23 indicator and HygroClip 2 probe (HC2) operate toget her as indicated
below:
Function / Setting
HP23
HC2
Notes
Device protection
X
X
Individual to the HP23 and HC2 probe
RS-485 address
X
X
Individual to the HP23 and HC2 probe
Device Name
X
X
User defined description
The device name of the HC2 probe is not displayed by HW4 and is
replaced with the HP23 Input Name
Calculation
X
X
Psychrometric calculation
HP23 setting overrides HC2 probe setting
Data refresh rate
X
Refresh interval for the LC display. When set above 1 s, this
setting causes the HC2
probe not to be powered in between
display refreshes so as to conserve battery power.
Note: when the HP23 is recording data, the probe is powered as
required by the log interval, regardless of the display refresh
interval.
Simulator function
X
X
Generates fixed humidity and / or temperature value
When enabled, the HP23 settings override the HC2 probe settings
Unit system
X
X
The HP23 setting overrides HC2 probe setting. The HC2 probe
settings still apply when the probe is used alone
Make sure to
use the same humidity symbol and the same
temperature unit for both the HP23 and probe.
Out
-of-limits value
alarm
X
X
The HP23 settings are independent from the HC2 probe settings.
The HC2 probe settings have no effect on the HP23 and out
-of-
limits
values defined at the probe level do not generate a HP23
alarm.
RH sensor test
X
The RH sensor is not tested when the refresh interval for the LC
display is set above 1 sec.
Analog outputs
X
Parameter and scale
The HC2 probe settings have no effect on the HP23
QAQC LAB 589 Rappahannock Drive White Stone Va 22578 TEL [phone]

E
-M-HP23-V2_12
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroPalm HP23-A / HP23-AW-A hand-held
indicator:
User Guide
Instruction Manual
Document Type
Page
11
of 38
Document title
© 2009-2012; Rotronic AG E-M-HP23-V2_12
4 Basic operation
4.1 Display
4.1.1 Display modes
The LC display has a backlight which can be set to be on all the time or whenever a key is pressed. The
backlight can also be disabled.
Using the HP23 Menu > Device Settings > Display Settings > Mode, the display mode can be changed as
shown below:
The display can also be configured to show a trend indicator on each line:
In the event of an alarm the symbol [ ! ] appears to the right of the value.
The bottom of the display shows the date and time as well as which probe is currently selected:
The battery charge is shown with a 7-bar icon.
A diskette icon appears when the probe data is being
logged.
The humidity and temperature
from probe 1 are being recorded
Battery charge indicator
Standard:
o%RH
oTemperature
oDate and time
3-line display:
o%RH
oTemperature
oCalculated
parameter
oNo date and time
Large:
Both the parameter
and probe can be
changed with the UP
arrow key or the
DOWN arrow key
QAQC LAB 589 Rappahannock Drive White Stone Va 22578 TEL [phone]

E
-M-HP23-V2_12
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroPalm HP23-A / HP23-AW-A hand-held
indicator:
User Guide
Instruction Manual
Document Type
Page
12
of 38
Document title
© 2009-2012; Rotronic AG E-M-HP23-V2_12
4.1.2 Difference between Probe 1 and Probe 2 (Delta Probe)
The difference between the humidity, temperature and calculated parameter of two probes connected to the
HP23 (Probe 1 value minus Probe 2 value) can be shown on the display by turning on the DPbe/UCalc option
(HP23 internal menu - accessed from the keypad). The Delta Probe function is similar to a third probe that can
be selected from the keypad with the UP key or with the DOWN key.
Note: This function works only when two probes are connected to the HP23. Delta Probe is also not available
when the HP23 has been configured with the HW4 software to calculate a user defined parameter (see
below).
4.1.3 User defined parameter
Using the HW4 software, the HP23 can be enabled to calculate up to two user defined parameters such as
the difference between the temperature and the dew point measured by a probe, the average of the
temperature measured by two probes, etc.
The user defined parameters can be shown on the display by turning on the DPbe/UCalc option (HP23
internal menu - accessed from the keypad). For additional explanations and instructions see the following
HW4 manual: E-M-HW4v3-F2-012.
4.2 Keypad
ON/OFF: Turns the instrument on or off.
Activates / de-activates HOLD function
MENU: Activates the internal menu. Press this
key again to
go back to the previous sub-
menu or to exit the menu
UP / DOWN:
o
Changes the probe being displayed (including delta
probe or user defined parameter, when enabled)
oChanges the data-bin used to capture data
oWhen the menu is active, use to navigate
the menu,
make a selection or change a value
ENTER:
oWhen the menu is active, use to confirm the
selection of a menu item, effect a change of
settings and confirm any change
oIn the HP23 Standard Mode, use to capture the
current %RH and temper
ature data to one of the 8
data bins
o
In the HP23 AW Mode, use to start, hold or stop
the water activity measurement function
QAQC LAB 589 Rappahannock Drive White Stone Va 22578 TEL [phone]

E
-M-HP23-V2_12
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroPalm HP23-A / HP23-AW-A hand-held
indicator:
User Guide
Instruction Manual
Document Type
Page
13
of 38
Document title
© 2009-2012; Rotronic AG E-M-HP23-V2_12
4.3 ON/OFF key
The ON/OFF key is used as follows:
oTo turn the instrument on: press the ON/OFF key
oTo turn the instrument off: press the ON/OFF key for more than 1 second
oTo activate the HOLD function: press the ON/OFF key briefly (less than 1 second)
oTo deactivate the HOLD function: press the ON/OFF key briefly (less than 1 second)
4.4 HOLD function
When
the date and time are normally displayed.
The display is frozen and shows the values that were either last measured or last calculated at the time the
ON/OFF key was pressed. All functions such as data logging, data capture, probe adjustment, etc. are also
frozen. Likewise, communication with the ROTRONIC HW4 software is frozen. The HP23 menu can still be
used to change the display mode, but the values are not updated. The HOLD function is automatically ended
whenever the instrument is turned off. The values that were displayed while the HOLD function was active are
not memorized and are lost.
The HOLD function is not available when the Aw Mode is enabled. Enabling the Aw Mode automatically ends
the HOLD function.
WARNING: when the HOLD function is active, functions such as data logging and probe adjustment from the
keypad should not be used because both the measured and calculated values are no longer u pdated.
4.5 Internal menu
Note
(use the HW4 software > Device Manager > Display)
Main Menu
Menu Items
Submenu
Items
Selections or
Information
Notes
Device Info
Serial Nbr
Serial number
Version
Firmware version
Type
Device type
Name
Device name
User defined
Battery
Battery charge
status
Device Settings
Display Settings
Trend
ON / OFF
Trend indication on the
display
Decimals
1 or 2
Display resolution
Contrast
LC display contrast
adjustment
Back Light
Key Press/ON/OFF
Display backlight mode
Mode
Standard
H+T+Calc
Large
See 4.1.1
DPbe/UCalc
ON / OFF
See 4.1.2 / 4.1.3
QAQC LAB 589 Rappahannock Drive White Stone Va 22578 TEL [phone]

E
-M-HP23-V2_12
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroPalm HP23-A / HP23-AW-A hand-held
indicator:
User Guide
Instruction Manual
Document Type
Page
14
of 38
Document title
© 2009-2012; Rotronic AG E-M-HP23-V2_12
Main Menu
Menu Items
Submenu
Items
Selections or
Information
Notes
Local Settings
Date Fmt
dd mm yyyy
mm dd yyyy
yyyy mm dd
Date format
Separator
. or /
Date separator
Time Fmt
24h / 12 h
Time format
Unit Sys
Metric / English
Unit system
Input 1
Pbe Type
HygroClip
Analog
Pressure
Probe type
Calc
Calculation
HygroClip probe only
U min (mV)
Analog probe voltage
output range
U max (mV)
Analog probe voltage
output range
Range Min
Analog probe measuring
range
Range Max
Analog probe measuring
range
Input 2
See Input 1
See Input 1
Pressure
Fixed barometric pressure
value used as an input for
some psychrometric
calculations
DataUpdate
1s/10s/1min/10 min
Display refresh interval
BattCharge
ON / OFF
Enable or disable battery
charge function
Date
Manual date setting
Time
Manual time setting
Probe 1
Note: this section
applies only
when input 1 is
connected to one
of the following:
HygroClip 2
probe
Service
connector of a
device with
integral probe
(HF3, HF4, etc.)
Info
Serial Nbr
Version
Firmware version
Name
User defined (HW4)
Humi Adjust
Acquired Points
Lists the cal. points
present in the probe
memory (a max. of
10 points are
shown)
Additional Options:
oClear all cal. points
oClear the last point
Acquire Ref
Saves value measured by
probe 2 as a cal. point
Acquire
Manual entry:
known reference
environment
Saves value entered
manually as a cal. point
Adjust
Adjusts the probe
Effect depends on number
of calibration points in
probe memory
QAQC LAB 589 Rappahannock Drive White Stone Va 22578 TEL [phone]

E
-M-HP23-V2_12
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroPalm HP23-A / HP23-AW-A hand-held
indicator:
User Guide
Instruction Manual
Document Type
Page
15
of 38
Document title
© 2009-2012; Rotronic AG E-M-HP23-V2_12
Main Menu
Menu Items
Submenu
Items
Selections or
Information
Notes
Reset to
Factory
Returns the probe to the
initial factory adjustment
Temp Adjust
Acquired Points
Lists the cal. points
present in the probe
memory (a max. of 2
points are shown)
Additional Options:
oClear all cal. points
o
Clear the last point
Acquire Ref
Saves value measured by
probe 2 as a cal. point
Acquire
Manual entry:
known reference
environment
Saves value entered
manually as a cal. point
Adjust
Adjusts the probe
Effect depends on number
of calibration points in
probe memory
Reset to
Factory
Returns the probe to the
original factory adjustment
Probe 1
Note: this section
applies when
input 1 is
connected by
means of cable
AC2001 to the
service connector
of a HF5 or HF8
transmitter
Probe Sel
HF5: be sure to
select probe 1
HF8: select probe 1
or probe 2
HF5: one probe only
HF8: up to 2 probes
Device Info
Serial Nbr
Information read from the
HF5 or HF8
Version
Firmware version
Name
User defined (HW4)
Probe Info
Serial Nbr
Information read from the
selected probe connected
to the HF5 or HF8
Version
Firmware version
Name
User defined (HW4)
Humi Adjust
Applies to
selected probe
connected to
HF5 or HF8
Acquired Points
Lists the cal. points
present in the probe
memory (a max. of
10 points are
shown)
Additional Options:
oClear all cal. points
oClear the last point
Acquire Ref
Saves value measured by
probe 2 (HP23) as a cal.
point
Acquire
Manual entry:
known reference
environment
Saves value entered
manually as a cal. point
Adjust
Adjusts the probe
Effect depends on number
of calibration points in
probe memory
Reset to
Factory
Returns the probe to the
initial factory adjustment
QAQC LAB 589 Rappahannock Drive White Stone Va 22578 TEL [phone]

E
-M-HP23-V2_12
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroPalm HP23-A / HP23-AW-A hand-held
indicator:
User Guide
Instruction Manual
Document Type
Page
16
of 38
Document title
© 2009-2012; Rotronic AG E-M-HP23-V2_12
Main Menu
Menu Items
Submenu
Items
Selections or
Information
Notes
Temp Adjust
Applies to
selected probe
connected to
HF5 or HF8
Acquired Points
Lists the cal. points
present in the probe
memory (a max. of 2
points are shown)
Additional Options:
oClear all cal. points
o
Clear the last point
Acquire Ref
Saves value measured by
probe 2 (HP23) as a cal.
point
Acquire
Manual entry:
known reference
environment
Saves value entered
manually as a cal. point
Adjust
Adjusts the probe
Effect depends on number
of calibration points in
probe memory
Reset to
Factory
Returns the probe to the
original factory adjustment
Probe 2
Note: this section
applies only
when input 2 is
connected to one
of the following:
HygroClip 2
probe
Service
connector of a
device with
integral probe
(HF3, HF4, etc.)
See Probe 1
See Probe 1
See Probe 1
Input 2 is not designed for
connection to the service
connector of a HF5 or HF8
transmitter
Data Capture
oDisplays the names of
the 8 data bins
o
Press on ENTER to
select the
highlighted
data bin
View Data
oShows the individual
data records
o
Use the up and down
keys to navigate the
records
Summary
Shows the minimum,
maximum and average
values for the data bin
Clear Data
Clears the data bin
Data Logging
oRecording (ON / OFF)
oNbr of records
oLog Interval
oMode:
QAQC LAB 589 Rappahannock Drive White Stone Va 22578 TEL [phone]

E
-M-HP23-V2_12
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroPalm HP23-A / HP23-AW-A hand-held
indicator:
User Guide
Instruction Manual
Document Type
Page
17
of 38
Document title
© 2009-2012; Rotronic AG E-M-HP23-V2_12
Main Menu
Menu Items
Submenu
Items
Selections or
Information
Notes
Start Stop / Loop
Start Recording
Stop Recording
oRecording
oSamples
oInterval
oMode
Data logging by the HP23
(max. 10,000 H+T records)
Settings
Cannot be
changed while
the HP23 is
recording data
Interval
Log interval: 5 sec to 1 h
Mode
StartStop / Loop
Start Stop: the recording
stops when the memory is
full
Loop: when the memory is
full the oldest record is
dumped to make room for
the new record
Probe 1
ON / OFF
Probe 2
ON / OFF
Aw Mode
Enable
ON / OFF
Enable = ON changes the
display as follows:
o
Humidity unit changes
to aw
oNo calculated
parameter
o
Large display mode is
disabled
Mode
AwQuick / AwE
oAwQuick: accelerated
water activity
measurement
oAwE: conventional
water activity
measurement
Dwell Time
minutes
Dwell time (AwQuick)
AwQ Temp
°C / minute
Temperature stability
definition (AwQuick)
AwE Temp
°C / minute
Temperature stability
definition (AwE)
AwE Humi
a
w
/ minute
Humidity stability definition
(AwE)
SaveResult
ON / OFF
When Aw measurement is
ended, the result is saved
in the following data bins:
Probe 1: always to Bin 1
Probe 2: always to Bin 2
NOTE: use the MENU key to go back one step from any sub-menu or to exit the entire menu (this may require
several key presses).
QAQC LAB 589 Rappahannock Drive White Stone Va 22578 TEL [phone]

E
-M-HP23-V2_12
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroPalm HP23-A / HP23-AW-A hand-held
indicator:
User Guide
Instruction Manual
Document Type
Page
18
of 38
Document title
© 2009-2012; Rotronic AG E-M-HP23-V2_12
4.6 Frequently used settings
4.6.1 Unit system
Press the MENU key and select Device Settings > Local Settings > Unit Sys. Press ENTER to activate the
Unit Sys menu item, use the UP or DOWN arrow key to change the unit system. Press ENTER to confirm and
press MENU to exit.
The HW4 software can also be used to change the unit system.
4.6.2 Date and time
Press the MENU key and select Device Settings > Date or Time. Press ENTER to activate either the Date or
the Time menu item, use the UP or DOWN arrow key to change the Date or the Time. After each change, the
cursor moves to the right. When done, press ENTER to confirm and press MENU to exit.
To change either the date or the time format, Press the MENU key and select Device Settings > Local
Settings > Date Fmt or Time Fmt. Press ENTER to activate either the Date Fmt or the Time Fmt menu item,
use the UP or DOWN arrow key to change the Date or the Time format. When done, press ENTER to confirm
and press MENU to exit.
The HW4 software can also be used to set the clock of the HP23 to the PC date and time.
4.6.3 Select the calculated parameter for a probe input
The calculated parameter is available only when the input is set for a digital HygroClip 2 probe. Press the
MENU key and select Device Settings > Input 1 or Input 2 > Calc. Press ENTER to activate the Calc sub-
menu, use the UP or DOWN arrow key to select the calculated parameter. Press ENTER to confirm and press
MENU to exit.
4.6.4 Select which probe and/or parameters are shown on the display
Press the MENU key and select Device Settings > Display Settings > Mode. Press ENTER to activate the
Mode menu item, use the UP or DOWN arrow key to select the display mode. Press ENTER to confirm and
press MENU to exit.
Depending on the display mode, use the UP or DOWN arrow key to change the probe and/or parameter being
displayed.
NOTE: The calculated parameter (HygroClip 2 probe only) is shown only if enabled for the probe input that is
selected (MENU > Input 1 or Input 2 > Calc).
QAQC LAB 589 Rappahannock Drive White Stone Va 22578 TEL [phone]

E
-M-HP23-V2_12
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroPalm HP23-A / HP23-AW-A hand-held
indicator:
User Guide
Instruction Manual
Document Type
Page
19
of 38
Document title
© 2009-2012; Rotronic AG E-M-HP23-V2_12
4.6.5 Set input 1 or 2 for a digital or analog probe
Press the MENU key and select Device Settings > Input 1 or Input 2 > Pbe Type. Press ENTER to activate the
Pbe Type menu item, use the UP or DOWN arrow key to change the probe type. Press ENTER to confirm and
press MENU to exit.
When using an analog probe, be sure to define both the voltage signal range and the measuring range of the
probe. HW4 is required to define the unit of measurement of an analog probe.
The HW4 software can also be used to change the probe type for each input.
4.7 Practical advice for measuring humidity
The most common source of error when measuring relative humidity is a difference between the temperature
of the probe and the temperature of the environment. At a humidity condition of 50 %RH, a temperature
difference of 1 C (1.8 F) typically results in an error of 3 %RH on relative humidity.
When using the HP22 hand-held indicator, it is good practice to monitor the display for temperature stability.
The probe should be given sufficient time to equilibrate with the environment to be m easured. The larger the
initial temperature difference between the probe and the environment to be measured, the more time
temperature equilibration requires. This time can be shortened, and errors avoided, by using the probe
configuration that fits best for your application.
In extreme situations, condensation may occur on the sensors when the probe is colder than the environment.
As long as the humidity / temperature limits of the humidity sensor are not exceeded, condensation does not
alter the calibration of the sensor. However, the sensor has to dry out before it can provide a valid
measurement.
Non-moving air is an excellent insulator. When there is no air movement, surprising differences in temperature
and humidity can noted over short distances. Air movement at the probe generally results in measurements
that are both faster and more accurate.
5 Using the HP23 functions
5.1 Data capture
Manual data capture is available only in the HP23 standard operating mode. Data cannot be manually
captured when the HP23 is in the AW mode.
Up to 250 relative humidity and temperature records can be manually captured to each of the 8 data -bins. The
captured data is automatically date and time stamped. The calculated parameter cannot be captured. A
descriptive name can be given to each data-bin with the HW4 software (laboratory, warehouse, etc.)
Note: a descriptive name (laboratory, warehouse, etc.) can be given to each data-bin with the HW4 software
5.1.1 Capturing data
oUse the UP or DOWN arrow key to select the probe
oSelect the data-bin with the UP or DOWN arrow key
oPress the ENTER key to activate the Data Capture function
oData capture is confirmed on the HP23 display
oWait a few seconds or press MENU to EXIT the Data Capture function
QAQC LAB 589 Rappahannock Drive White Stone Va 22578 TEL [phone]

E
-M-HP23-V2_12
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroPalm HP23-A / HP23-AW-A hand-held
indicator:
User Guide
Instruction Manual
Document Type
Page
20
of 38
Document title
© 2009-2012; Rotronic AG E-M-HP23-V2_12
5.1.2 Viewing the captured data
Press the MENU key and select Data Capture. Press ENTER to activate the Data Capture menu item. Use the
UP or DOWN arrow key to select the data-bin to be viewed. Press ENTER to confirm and open the data-bin
sub-menu. Use the UP or DOWN arrow key to select a menu item and press ENTER to confirm:
oView Data: view individual data records
oSummary: view the maximum, minimum and average values
oClear Data: erase the contents of the data-bin
Press MENU to exit.
QAQC LAB 589 Rappahannock Drive White Stone Va 22578 TEL [phone]