Rotronic HygroPalm HP22 Manuale utente

E-M-HP22-V1_21

Rotronic AG

Bassersdorf, Switzerland

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Unit

HygroPalm HP22 hand-held indicator:

User Guide

Instruction Manual

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1of 16

Document title

HygroPalm HP22 Hand-Held Indicator

User Guide

E-M-HP22-V1_21

Rotronic AG

Bassersdorf, Switzerland

Document code

Unit

HygroPalm HP22 hand-held indicator:

User Guide

Instruction Manual

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Table of contents

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

2General description.................................................................................................................................3

2.1 Power supply.........................................................................................................................................3

2.2 Measured parameters...........................................................................................................................3

2.3 Calculated parameters..........................................................................................................................3

2.4 Service connector..................................................................................................................................4

3User configurable settings and functions.............................................................................................4

3.1 Function overview .................................................................................................................................4

3.2 Factory default settings.........................................................................................................................5

3.3 Interaction between the HP22 and probe functions...............................................................................7

4Operation .................................................................................................................................................8

4.1 Display ..................................................................................................................................................8

4.2 Keypad..................................................................................................................................................8

4.3 Internal menu ........................................................................................................................................9

4.4 Changing the parameters shown on the display .................................................................................10

4.5 Changing the unit system....................................................................................................................10

4.6 Low battery indicator...........................................................................................................................10

4.7 Practical advice for measuring humidity..............................................................................................10

5Maintenance...........................................................................................................................................11

5.1 Replacing the battery ..........................................................................................................................11

5.2 Service cable.......................................................................................................................................11

5.3 Location of the service connector (mini USB type)..............................................................................11

5.4 Periodic calibration check of the probe................................................................................................12

5.5 Cleaning or replacing the probe dust filter...........................................................................................13

6Firmware updates..................................................................................................................................13

7Technical data .......................................................................................................................................14

7.1 Specifications......................................................................................................................................14

7.2 Dew point accuracy.............................................................................................................................15

8Accessories ...........................................................................................................................................15

9Supporting documents.........................................................................................................................15

10 Document releases................................................................................................................................16

E-M-HP22-V1_21

Rotronic AG

Bassersdorf, Switzerland

Document code

Unit

HygroPalm HP22 hand-held indicator:

User Guide

Instruction Manual

Document Type

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3of 16

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Applicability:

This manual is valid for the HP22 with firmware version 1.x, where 1.x can be 1.0, 1.1 etc. Changes to the last

digit of the version number reflect minor firmware changes that do not affect the manner in which the

instrument should be operated.

1 Overview

The HP22 is a highly accurate hand-held indicator that displays relative humidity, temperature and a

calculated parameter such as the dew or frost point. The HP22 operates with a regular 9V alkaline battery and

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 HP22 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 HP22 electronics is limited to -10…60°C.

Based on the ROTRONIC AirChip 3000 digital technology the HP22 indicator and HygroClip 2 probes offer

the following user functions:

User configurable settings

Calculation of psychrometric parameters such as the dew or frost point

Humidity temperature calibration and adjustment

Simulator mode

Automatic humidity sensor test and drift compensation

Sensor failure mode

Data recording

The ability for the user to easily update both the HP22 and HygroClip 2 probe firmware means that the

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

2 General description

2.1 Power supply

The HP22 operates with a regular 9V alkaline battery

2.2 Measured parameters

The probes used with the HP22 measure relative humidity with a ROTRONIC Hygromer®IN1 capacitive

sensor and temperature with a Pt100 RTD.

2.3 Calculated parameters

Using the ROTRONIC HW4 software, the HP22 can be configured by the user to calculate one of the

following parameters:

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)

E-M-HP22-V1_21

Rotronic AG

Bassersdorf, Switzerland

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HygroPalm HP22 hand-held indicator:

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oVapor partial pressure (E)

oVapor saturation pressure (Ew)

Note: some of the above parameters depend on the value of the barometric pressure. Using the ROTRONIC

HW4 software, a fixed barometric pressure value can be specified. For instructions see the following HW4

manual: E-M-HW4v2-F2-006

2.4 Service connector

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

USB type connector. This allows connecting the HP22 either to a PC running the ROTRONIC HW4 software

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

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

service cable to be used.

Connecting the HP22 to a PC is used to configure the HP22, gain access to the HP22 and probe functions

such as humidity and temperature adjustment, read data from the HP22 on the PC and update the

firmware of either the HP22 or probe.

Connecting the HP22 to another instrument is useful only when the other instrument has its own display

and keypad, and has a more powerful internal menu than the HP22 (example HP23 hand-held calibrator).

This allows showing the data measured by the HP22 on the other instrument display and also allows using

the other instrument internal menu to do for example a humidity and temperature adjustment of the HP22.

3 User configurable settings and functions

The HP22 can be used just as any conventional humidity and temperature indicator and most users will never

need to use the HP22 configurable settings and functions.

Making use of the HP22 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 HP22 functions

and also indicated the factory default settings.

3.1 Function overview

MEASUREMENT ACCURACY AND RELIABILITY (PROBE FUNCTIONS)

AirChip 3000 Functions

Description

►Humidity / temperature adjustment

o1-point or multi-point humidity calibration or adjustment

o1-point or 2-point temperature calibration or adjustment

oGenerate a time stamp for calibrations and adjustments

oRetain and view last adjustment date and adjustment values

oGenerate calibration and adjustment protocols

►Automatic humidity sensor test

and optional drift compensation

Tests the humidity sensor for drift caused by contaminants and

can be used to automatically apply a correction. The test is

automatically carried out at regular intervals of time. Can be

configured, enabled, or disabled

The humidity sensor status can be verified either with the HW4

software or with the instrument display and is shown as Good,

SQ-tuned (corrected for drift) or Bad (defective)

E-M-HP22-V1_21

Rotronic AG

Bassersdorf, Switzerland

Document code

Unit

HygroPalm HP22 hand-held indicator:

User Guide

Instruction Manual

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►Data recording

The data recording function differs from a true data logging

function in the sense that the AirChip 3000 does not time stamp

the data. The data recording function can be use to investigate

events such as a sensor malfunction as well as to retrieve data

that would otherwise be lost

oStart or stop data recording - up to 2000 value pairs (%RH

and temperature)

oStarting a recording session erases all previously recorded

data

oThe recording mode and log interval can be specified

oWhen the device is powered off, the recording session is

paused but not ended As long as the recording session

has not been ended, the device automatically resumes

recording data when powered up again

oThe recorded data can be downloaded to a PC with the

HW4 software, time stamped and viewed

MEASUREMENT LOOP VALIDATION

Functions

Description

►Simulator mode

Used to make the HP22 generate fixed values for the humidity,

temperature and calculated parameter. Can be configured,

enabled or disabled

DEVICE SAFEGUARDS

Functions

Description

►Device write protection

Used to protect the HP22 with a password to prevent

unauthorized digital access by a digital user. Can be configured,

enabled or disabled

►Internal menu access from keypad

Used to prevent accidental changes to the HP22 settings and

temperature-humidity adjustment by disabling the MENU key on

the optional keypad. Can be enabled or disabled

3.2 Factory default settings

Notes:

oConfiguration of the HP22 and probe by the user and access to its functions requires a PC with the

ROTRONIC HW4 software (version 2.1.1 or higher) installed. Service cable AC3006 is used to connect the

HP22 service connector to a USB port of the PC.

oSettings and functions that can also be either partially or fully accessed from the keypad are marked with

the letter K(see also Operation > Internal Menu).

E-M-HP22-V1_21

Rotronic AG

Bassersdorf, Switzerland

Document code

Unit

HygroPalm HP22 hand-held indicator:

User Guide

Instruction Manual

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Configurable Settings

Factory default

Unit system (Metric or English)

Metric, except USA: English

Psychrometric calculation

Dew / frost point

Fixed pressure value

1013.25 hPa or 29.92 In Hg

Data refresh rate

1 sec.

Display resolution

1 decimal

Display backlight (optional)

On Key Press

Displayed parameters

%RH and temperature

Trend indicator (display)

Enabled

Communication protocol

RO-ASCII

RS-485 address

Device name

Instrument model

Functions

Factory default

Humidity / temperature adjustment

Device write protection

Disabled (HP22 and probe)

Menu access from keypad

Enabled

Limit humidity output to 100 %RH

Enabled (probe)

Out-of-limit value digital / display alarm

Disabled (HP22 and probe)

Data recording (probe)

Enabled (loop mode –10 min. interval)

Automatic humidity sensor test

Disabled (probe)

Humidity sensor drift compensation

Disabled (probe)

Monitor probe alarms

Enabled

Loss of communication with probe

Disabled

Simulator mode

Disabled (HP22 and probe)

oFor a detailed description of all AirChip 3000 / HP22 main functions see document E-T-AC3000-DF-V1

oInstructions regarding the configuration of the HP22 and probe as well as access to the functions are

provided in the following manuals:

E-M-HW4v2-F2-006

E-M-HW4v2-F2-001

E-M-HW4v2-Main (§ 6.5)

E-M-HW4v2-DR-001

E-M-HW4v2-A2-001

E-M-AC3000-CP

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

E-M-HP22-V1_21

Rotronic AG

Bassersdorf, Switzerland

Document code

Unit

HygroPalm HP22 hand-held indicator:

User Guide

Instruction Manual

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3.3 Interaction between the HP22 and probe functions

It is important to note that when used together, the HP22 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.

The functions and settings of the HP22 indicator and HygroClip 2 probe (HC2) operate together as indicated

below:

Function / Setting

HP22

HC2

Notes

Device protection

Individual to the HP22 and HC2 probe

RS-485 address

Individual to the HP22 and HC2 probe

Device Name

User defined description

The device name of the HC2 probe is not displayed by HW4 and is

replaced with the HP22 Input Name

Calculation

Psychrometric calculation

HP22 setting overrides HC2 probe setting

Data refresh rate

When set above 1 s, causes the HC2 probe not to be powered in

between measurements

Simulator function

Generates fixed humidity and / or temperature value

When enabled, the HP22 settings override the HC2 probe settings

Unit system

The HP22 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 HP22 and probe.

Out-of-limits value

alarm

The HP22 settings are independent from the HC2 probe settings.

The HC2 probe settings have an effect only when the HP22 is

enabled to monitor alarms generated by the probe

When out-of-limit values have been defined for the same

parameter for both the HP22 and probe, alarms are triggered

based on the narrowest set of limits.

Analog outputs

Parameter and scale

The HC2 probe settings have no effect on the HP22

E-M-HP22-V1_21

Rotronic AG

Bassersdorf, Switzerland

Document code

Unit

HygroPalm HP22 hand-held indicator:

User Guide

Instruction Manual

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4 Operation

4.1 Display

The LC display of the HP22 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.

The upper line corresponds to relative humidity or

dew / frost point and the bottom line corresponds to

temperature.

The display can be configured to show a trend

indicator on each line:

▲: increasing value

▼: decreasing value

In the event of an alarm the display shows the symbol [ ! ] to the right of the value.

For instructions see the following HW4 manual: E-M-HW4v2-F2-006.

4.2 Keypad

ON/OFF: Turns the instrument on or off

MENU: Press this key to activate the

internal menu. Press this key

again to exit the menu

UP / DOWN: When the menu is active, use these

keys to navigate the menu, make a

selection or change a value

ENTER: When the menu is active, press

this key to confirm a selection.

E-M-HP22-V1_21

Rotronic AG

Bassersdorf, Switzerland

Document code

Unit

HygroPalm HP22 hand-held indicator:

User Guide

Instruction Manual

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4.3 Internal menu

Note: Unauthorized access to the menu can be prevented by disabling the “display menu” setting

(use the HW4 software > Device Manager > Display)

Main Menu

Menu Items

Selections / Information

Notes

Device Settings

Units

Metric / English

Back Light

Key Press / On / Off

Display backlight mode

Contrast

LC display contrast adjustment

Trend

On / Off

Trend indication on the display

Device Information

Version

Firmware version

Serial Nbr

Serial number

Address

RS-485 address

Type

Device type

Name

Device name

User defined

Probe Information

Version

Firmware version

Serial Nbr

Serial number

Address

RS-485 address

Name

Device name

User defined

SensorTest

Humidity sensor status

Off / Good / SQ-Tuned / Bad

Record

On / Off

Data recording by the probe

(max. 2000 values)

Humidity Adjust

RefValue

Humidity reference value

± 0.1 %RH steps

Acquired

Number of cal. points in probe

memory

Save cal. point to probe memory

Erases all calibration points

Effect depends on number of

calibration points

Temperature Adjust

RefValue

Temperature reference value

± 0.1 ˚C steps

1-point adjustment only (offset)

oRecord: both the recording mode (start / stop and the log interval cannot be changed from the menu and

are as configured with the ROTRONIC HW4 software

oSensorTest: Off means that the humidity sensor has not been tested due to the configuration settings of

the test. For a description of the automatic humidity sensor test and drift compensation (SQ-tuning) see

documents E-T-AC3000-DF-V1 and E-M-HW4v2-F2-006

E-M-HP22-V1_21

Rotronic AG

Bassersdorf, Switzerland

Document code

Unit

HygroPalm HP22 hand-held indicator:

User Guide

Instruction Manual

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4.4 Changing the parameters shown on the display

When the menu is not active, press the ENTER key to change which parameters are shown on the display:

oRelative humidity and temperature

oRelative humidity, temperature and calculated parameter (when calculated parameter is enabled)

4.5 Changing the unit system

The unit system of the HP22 (metric or English) can be changed from the keypad (Menu > Settings > Unit).

Press the MENU key to show the internal menu on the display

With the menu item Settings highlighted, press the ENTER key

With the menu item Unit highlighted, press the ENTER key

Use the UP or DOWN key to change the unit system as desired

Press the MENU key twice to exit the menu and return the HP22 to normal operation

The optional HW4 software can also be used to change the unit system:

4.6 Low battery indicator

When the battery is down to about 20% of its initial charge, “Low Battery”appears at the bottom of the display.

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 measured. 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.

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