TESTO 425 Instruction Manual
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TESTO 425 Instruction Manual

Thermal anemometer
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Bedienungsanleitung
Instruction manual
Mode d'emploi
General notes ....................................................18
1.
Safety advice .....................................................18
2.
Intended purpose ...............................................19
3.
Product description ............................................20
3.1
Display and control elements ........................................ 21
3.2
Voltage supply .............................................................. 22
4.
Commissioning ..................................................22
5.
Operation ...........................................................23
5.1
Connecting a probe...................................................... 24
5.2
Switching the instrument on / off .................................. 24
5.3
Switching the display light on / off ................................ 24
5.4
Performing settings ...................................................... 24
6.
Measuring ..........................................................26
7.
Care and maintenance .......................................30
8.
Questions and answers ......................................31
9.
Technical data ...................................................32
10. Accessories/spare parts.....................................32
testo 425
Thermal anemometer
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Summary of Contents for TESTO 425

  • Page 1: Table Of Contents

    425 Thermal anemometer Bedienungsanleitung Instruction manual Mode d’emploi Contents General notes ............18 Safety advice .............18 Intended purpose ..........19 Product description ..........20 Display and control elements ........21 Voltage supply .............. 22 Commissioning ..........22 Operation ............23 Connecting a probe............24 Switching the instrument on / off ........

  • Page 2: General Notes

    General notes General notes This chapter provides important advice on using this documentation. The documentation contains information that must be applied if the product is to be used safely and efficiently. Please read this documentation through carefully and familiarise yourself with the operation of the product before putting it to use.

  • Page 3: Safety Advice

    Take faulty rechargeable batteries/spent batteries to the > collection points provided for them. Send the product back to Testo at the end of its > useful life. We will ensure that it is disposed of in an environmentally friendly manner.

  • Page 4: Intended Purpose

    Use the product only for those applications for which it was designed. Ask Testo if you are in any doubt. testo 425 is a compact instrument for measuring flow velocities and temperatures by means of a permanently connected flow/temperature probe (hot wire probe).

  • Page 5: Product Description

    3. Production description 21 Product description This chapter provides an overview of the components of the product and their functions. 3.1 Display and control elements Overview Probe  Display  Control buttons  Battery compartment (rear)  Service compartment (rear) ...

  • Page 6: Voltage Supply

    3. Production description Important displays Display Meaning Battery capacity (bottom right in display): · 4 segments in the battery symbol are lit: Instrument battery is fully charged · No segments in the battery symbol are lit: Battery is almost spent 3.2 Voltage supply Voltage is supplied by means of a 9V monobloc battery (included in delivery) or rechargeable battery.

  • Page 7: Commissioning

    4. Commissioning 23 Commissioning This chapter describes the steps required to commission the product. Inserting a battery/rechargeable battery:  To open the battery compartment on the rear of the instrument, push the lid of the battery compartment in the direction of the arrow and remove it. Insert a battery/rechargeable battery (9V monobloc).

  • Page 8: Operation

    5. Operation Operation This chapter describes the steps that have to be executed frequently when using the product. 5.1 Connecting a probe The necessary probes are permanently connected or integrated. It is not possible to connect any additional probes. 5.2 Switching the instrument on / off Switching the instrument on: ...

  • Page 9: Performing Settings

    5. Operation 25 5.4 Performing settings To open configuration mode: The instrument is switched on and is in measurement  view. Hold, Max or Min are not activated. Press and hold (for approx. 2s) until the display > changes. - The instrument is now in configuration mode. You can change to the next function with You can leave configuration mode at any time.
  • Page 10 5. Operation To set Auto Off: Configuration mode is opened, AutoOff is flashing.  Select the desired option with and confirm > with · on: The measuring instrument switches off automatically if no button is pressed for 10min (Hold or Auto Hold is lit). ·...

  • Page 11: Measuring

    6. Measuring 27 Measuring This chapter describes the steps that are required to perform measurements with the product. Taking a measurement:  The instrument is switched on and is in measurement  view. Put the probe in position. > The arrow mark on the probe head must point in the direction of flow.
  • Page 12 6. Measuring Holding the reading, displaying the maximum/minimum value: The current reading can be recorded. The maximum and minimum values (since the instrument was last switched on) can be displayed. Press several times until the desired value is > displayed. - The following are displayed in turn: ·...
  • Page 13 6. Measuring 29 To end measurement and calculate the mean value: Press Mean flashes. The calculated spot mean value is displayed. To return to measurement view: Press Performing a mean calculation in time:  Hold, Max or Min are not activated. ...

  • Page 14: Care And Maintenance

    7. Care and maintenance 7. Care and maintenance This chapter describes the steps that help to maintain the functionality of the product and extend its service life. Cleaning the housing:  Clean the housing with a moist cloth (soap suds) if >...

  • Page 15: Questions And Answers

    · Permitted measuring · Keep to permitted range was exceeded. measuring range. If we are unable to answer your question, please contact your dealer or Testo Customer Service. For contact data, see back of this document or web page www.testo.com/ service-contact...

  • Page 16: Technical Data

    10. Accessories/spare parts Name Part no. TopSafe testo 425, protects from impact and dirt particles 0516 0221 For a complete list of all accessories and spare parts, please refer to the product catalogues and brochures or look up our website: www.testo.com...

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