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E-M-HP21-V1_21 

Rotronic AG 
Bassersdorf, Switzerland 

Document code 

Unit 

HygroPalm HP21 hand-held indicator: 
User Guide 

Instruction Manual 

Document Type 

Page 

8

 of 14 

Document title 

 
 

© 2009-2010; Rotronic AG                                                                                                                              E-M-HP21-V1_21

 

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 

Settings 

 

 

 

 

Unit 

°C / °F 

Temperature / dew or frost point 

 

Record 

On / Off 

Data recording (max. 2000 values) 

 

Back Light 

Key Press / On / Off 

Display backlight  mode 

Device Information 

 

 

 

 

Version 

Firmware version 

 

 

Serial Nbr 

Serial number 

 

 

Address 

RS-485 address 

 

 

Type 

Device type 

 

 

Name 

Device name 

User defined 

 

SensorTest 

Humidity sensor status 

Off / Good / SQ-Tuned / Bad 

Humidity Adjust 

 

 

 

 

RefValue 

Humidity reference value 

± 0.1 %RH steps 

 

<Adjust> 

 

1-point adjustment only (offset) 

Temperature Adjust 

 

 

 

 

RefValue 

Temperature reference value 

± 0.1 ˚C steps

 

 

<Adjust> 

 

1-point adjustment only (offset)

 

 
Notes: 
 

o

 

Record: 

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 

o

 

SensorTest: 

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-HW4v3-F2-004

 

 

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: 
 

o

 

Relative humidity and temperature 

o

 

Dew / frost point and temperature (when calculated parameter is enabled) 

 

4.5    Changing the temperature unit 

The temperature unit of the HP21 (°C or °F) 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 temperature unit as desired 
  Press the MENU key twice to exit the menu and return the HP21 to normal operation 

 

Summary of Contents for HygroPalm HP21

Page 1: ...sersdorf Switzerland Document code Unit HygroPalm HP21 hand held indicator User Guide Instruction Manual Document Type Page 1 of 14 Document title 2009 2010 Rotronic AG E M HP21 V1_21 HygroPalm HP21 H...

Page 2: ...tions 4 3 1 Function overview 4 3 2 Factory default settings 6 4 Operation 7 4 1 Display 7 4 2 Keypad 7 4 3 Internal menu 8 4 4 Changing the parameters shown on the display 8 4 5 Changing the temperat...

Page 3: ...V alkaline battery Based on the ROTRONIC AirChip 3000 digital technology the HP21 offers the following user functions User configurable settings Calculation of the dew or frost point Humidity temperat...

Page 4: ...t internal menu to do for example a humidity and temperature adjustment of the HP21 3 User configurable settings and functions The HP21 can be used just as any conventional humidity and temperature in...

Page 5: ...hen the device is powered off the recording session is paused but not ended As long as the recording session has not been ended the device automatically resumes recording data when powered up again o...

Page 6: ...esolution 1 decimal Display backlight K On Key Press Displayed parameters K RH and temperature Trend indicator display Enabled Communication protocol RO ASCII RS 485 address 0 Device name Instrument m...

Page 7: ...idity 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...

Page 8: ...nt adjustment only offset Notes o Record 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 o SensorTest Off m...

Page 9: ...ensation 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 calib...

Page 10: ...to select either H Adjust or T Adjust and press the ENTER key Make sure that the text line beginning with RefValue is highlighted and press the ENTER key Use the UP or DOWN key to change the reference...

Page 11: ...easily If this happens correct the alignment by holding the sensor very gently with a pair of small flat nosed pliers 6 Firmware updates Firmware updates will be available on the ROTRONIC website for...

Page 12: ...IEC 751 1 3 class B Measuring range 10 60 C Measurement accuracy at 23 C 0 2 C Repeatability 0 05 C Long term stability 0 1 C year Sensor time constant Typical 4 sec 63 of a step change 1m sec air fl...

Page 13: ...nsing Operating limits at electronics 10 60 C limited by LC display 0 100 RH non condensing Temperature limits at probe Same as electronics Maximum humidity at probe Same as electronics Maximum air ve...

Page 14: ...Main HW4 software version 3 General instructions and functions common to all devices E M HW4v3 F2 004 HW4 software version 3 HP21 hand held indicator Device configuration and AirChip 3000 functions E...

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