testo 420 · Flow Hood Instruction manual
1 Contents 1 Contents 1 Contents ...................................................................................................3 2 Safety and the environment....................................................................4 2.1. About this document ........................................................................4 2.2. Ensure safety...................................................................................5 2.3. Protecting the environment ........................................
2 Safety and the environment 2 Safety and the environment 2.1. About this document Use > Please read this documentation through carefully and familiarize yourself with the product before putting it to use. Pay particular attention to the safety instructions and warning advice in order to prevent injuries and damage to the products. > Keep this document to hand so that you can refer to it when necessary. > Hand this documentation on to any subsequent users of the product.
3 Specifications 2.2. Ensure safety > Do not operate the instrument if there are signs of damage at the housing, mains unit or feed lines. > Do not perform contact measurements on non-insulated, live parts. > Do not store the product together with solvents. Do not use any desiccants. > Carry out only the maintenance and repair work on this instrument that is described in the documentation. Follow the prescribed steps exactly. Use only original spare parts from Testo.
3 Specifications 3.1. Use 3.2. Technical data The use of the wireless module is subject to the regulations and stipulations of the respective country of use, and the module may only be used in countries for which a country certification has been granted. The user and every owner has the obligation to adhere to these regulations and prerequisites for use, and acknowledges that the re-sale, export, import etc. in particular in countries without wireless permits, is his responsibility. 3.2.1.
3 Specifications This instrument complies with part 15 of the FCC Rules. Its commissioning is subject to the following two conditions: (1) This instrument may not cause harmful interference and (2) this instrument must be able to accept interference, even if this could have undesired effects on the operation. Changes The FCC demands that the user be informed that any changes or modifications to the instrument that are not explicitly approved by Testo AG may void the user's right to use this instrument. 3.
3 Specifications Feature Values Resolution Temperature: 0.1 °C / 0.1°F Humidity: 0.1% RH Flow velocity: 0.01 m/s Volume flow: 1 m³/h / 1 cfm Pressure (absolute pressure): 0.1 hPa / 0.1 mbar / 0.01 kPa Pressure (differential pressure): 0.001 Pa / 0.00001 hPa / 0.00001 mbar / 0.0001 mm H2O / 0.000001 inH2O Accuracy Temperature: ±0.5 °C (0 to +70 °C) / ±0.8 °C (nominal temperatur (-20 to 0 °C) e 22°C/71.6°F) Humidity: ±1.8% RH +3% of m.v.
3 Specifications Feature Values Temperature coefficient Humidity: ± 0.03% RH / K (deviating from 22°C, in the range 0 to 60 °C) Volume flow: ± 0.02% of m.v. / K (deviating from 22 °C, in the range 0 to 60 °C) Pressure (absolute pressure): ± 0.02% of m.v. / K (deviating from 22 °C, in the range 0 to 60 °C) Pressure (differential pressure): ± 0.02% of m.v. / K (deviating from 22 °C, in the range 0 to 60 °C) Response time t90 Temperature: approx. 45 s Humidity: approx. 15 s Flow velocity: approx.
4 Product description Feature Values Display Type: Dot matrix Dimensions: 3.5 inches Directives, EU guideline: 2014/30/EU standards and tests Warranty Duration: 2 years Warranty terms: see website www.testo.com/warranty 4 Product description 4.1. Overview 4.1.1.
4 Product description 4.1.2. Overview of testo 420 1 2 3 4 5 6 Battery compartment, on rear of the instrument Display Control keys Probe socket Mini-DIN Micro-USB port Connection for pressure measurement Instrument status icons: Icon Meaning Battery capacity Bluetooth / Actual / Measuring mode: Pressure measurement, Pitot tube, volume flow (air pressure from above into the hood / suction outlet) Actual volume flow: The current ambient conditions are used to calculate the volume flow.
4 Product description Icon Meaning Standard Standard volume flow: The standard settings for temperature and barometric pressure (21 °C / 1013 hPa) are used to calculate the volume flow. K-factor Factor by which the current reading is multiplied. Depends on which outlet measurements are being taken at. Pitot Tube factor The Pitot tube factor for Pitot tubes is generally the same and must be entered: • Pitot tubes from Testo: 1.
5 First steps 5 First steps Inserting batteries/rechargeable batteries 1. Open the battery compartment. 2. Insert the batteries or rechargeable batteries (scope of delivery includes 4x 1.5V Type AA/ LR6). 3. Close the battery compartment. When not in use for a long period of time, take the batteries/rechargeable batteries out. Implementing settings 1. Press to access the menu. 2. Select the menu item you require using ►, ▲, ▼, ◄.
5 First steps 1. Menu Level 2. Menu Level 3. Menu Level Memory New Folder -- Folder 1 -- Volume Flow on/off Diff.Pressure on/off Temperature on/off Velocity on/off Humidity on/off Abs.
6 Using the product 6 Using the product 6.1. Switching Bluetooth® on and off In order to be able to establish a connection via Bluetooth, you need a tablet or smartphone with the Testo App Climate already installed on it. You can get the App for iOS instruments in the App Store or for Android instruments in the Play Store. Information about compatibility can be found in the relevant App Store. 1. Press -> Device Settings -> Bluetooth, ► and using ▲/▼ -> select Off. Confirm with .
6 Using the product 6.2.2. Hood calibration This input is provided for the filing of calibration data by the relevant calibration laboratory. The flow hood-specific adjustment data can be input manually for supply air and exhaust air and has a direct effect on the measurement results. Input option of 0.001-9.999. 1. Press , then select Device settings and Hood adjustment. - Calibration of the hood can be set for supply air and exhaust air. 6.2.3.
6 Using the product 6.3. Volume flow measurement setup Standard hood (610x610 mm, scope of delivery; 360x360, accessories) 1. 2. 3. 4. Pull the lower end of the hood over the measurement base. Attach the hood at two corners using the snap fasteners. Tighten the closure. Push the support rods through the hood, along the markings and into the funnel in the measurement base. 5. Push the support rods on the top of the hood into the brackets. - The hood is installed.
6 Using the product Large hood (1220x610 and 1220x305, accessories) 1. Install the aluminium frame and stretch the fabric hood over the framework, so that the elastic band lies in the recess of the frame. Make sure that the elastic band fits correctly, especially at the corners. 2. Pull the lower end of the hood over the measurement base. 3. Attach the hood at two corners using the snap fasteners. 4. Tighten the closure. 5.
6 Using the product Attaching the measuring instrument 1. Push the testo 420 completely into the instrument holder, pay attention to the catch on the right-hand and left-hand side in the bracket.
6 Using the product 6.4. Measuring 6.4.1. Volume flow measurement ✓ The volume flow hood is fitted. 1. Switch on the instrument. 2. In the instrument settings, set the application volume flow hood and also the required measurement program: Single measurement or Continuous measurement. 3. Press ►, ■ on the testo 420, or the trigger on the measurement base to hold or start and stop the measurement. 4. Press to save the measurement data.
6 Using the product 4. Carry out the measurement. 5. Press to save the measurement data. Unsaved measurement data is lost once you carry out the next measurement. - The target folder and file name are displayed, confirm with to save the measurement data under this name and in the selected folder. 6.5. Saving > -> Memory -> - The folder overview is shown on the display. Create a new folder via New Folder. Open folder > Using the arrow keys, navigate to the required folder and press .
8 Tips and assistance 1. Using the arrow keys, navigate to the required folder and press . 2. Select the menu item Total Volume Flow and confirm with . - The single measurements and the total volume flow are displayed. 6.6. Transferring measurement data to the PC 1. Connect the testo 420 to your PC using the USB cable. - The testo 420 switches on automatically, a window appears on the PC, select Open folder here. The folders and files saved on your testo 420 are displayed.
8 Tips and assistance 8.3. Accessories and spare parts Description Article no.
0970 4200 de 01 V01.
Power is so low that no RF exposure calculation is needed. FCC statements: This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. NOTE: The manufacturer is not responsible for any radio or TV interference caused by unauthorized modifications or changes to this equipment.
