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Table of Contents
Summary of Contents for TESTO 476
- Page 1 476 Instruction manual...
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Page 2: Preface
We will endeavour to provide fast and competent assistance to save you long periods out of operation. Copyright This documentation is subject to the copyright of Testo AG. Reproduction and employment contrary to the justified interests of Testo AG are prohibited without the prior, writ- ten consent of the company. -
Page 3: General Information
General Information This instruction manual contains important information about the features and use of the instrument. Please read this document carefully and familiarise yourself with the operation of the instrument before putting it to use. Always keep this manual close at hand in order to look up necessary information. -
Page 4: Table Of Contents
Contents Preface ............2 General Information ........2 Contents ............4 1. Basic safety instructions ......5 2. Intended use ..........6 3. Delivery range ..........6 4. Overview ............7 5. Power supply ..........8 Mains unit Setup ..........8 Charge the battery ..........9 Battery management ........10 6. Operation............10 7. -
Page 5: Basic Safety Instructions
Do not allow liquids or metallic objects to enter into the ventilation holes. Recharge the battery using only the original mains unit with supplied the testo 476 Use the supplied mains unit only with the testo 476 DANGER HIGH VOLTAGE! To reduce risk of an electronic shock, do not open the Pocket-Strobe. -
Page 6: Intended Use
2. Intended use You can use the in a variety of industrial, laborato- testo 476 ry, R&D and academic environments. Most commonly, the is used to make objects testo 476 which are moving at high speeds appear to be moving in slow motion. -
Page 7: Overview
4. Overview Close-up of LCD: Underside: On/Off Flash Adjustment Knob adjusts the flash rate. The speed with which the flash rate changes is controlled by how quickly the knob is rotated: Quick rotation = flash rate changes in large increments. -
Page 8: Power Supply
Charge the battery before first use or when the “LOW BAT“ indicator appears on the LCD. NOTE: When the “LOW BAT” indicator is shown, the testo 476 approximately 6 minutes of operating time remaining. When the “LOW BAT” indicator flashes on and off, the battery is empty and the will automatically switch off. -
Page 9: Battery Management
5. Power supply 5.3 Battery management Several factors effect the battery life: - The warmer the operating environment, the shorter the battery life; the cooler the environment, the longer the battery life. To maximise the life of the battery: Keep the battery not fully charged. Keep storage temperature as low as possible (10...20 °C) -
Page 10: Operation
6. Operation The testo 476 can be operated with and without mains unit. The Lithium ion rechargeable battery is recharged when the instrument is connected to the mains unit. 1 Aim the at the moving object and turn it on testo 476 ... -
Page 11: Error Messages
( 8. External triggering can be externally triggered. testo 476 The EXTERNAL TRIGGER jack is DTL/ TTL compatible. It detects a square-wave signal of 0 to +5 volts which is at least 800nsec in duration. -
Page 12: Replacing The Flash Tube
9. Replacing the flash tube 1 Remove the front bezel screw located on the underside of the front bezel ( 2 Swing the bezel upwards and outward carefully ( ). Be sure not to break the old flash tube. Ensure that the bezel hooks on the top edge are released. -
Page 13: Application Information
10. Application information 10.1 Slowing down motion As discussed, the primary use of the Pocket-Strobe is to slow down or “freeze” the apparent motion of moving objects. This allows you to analyse their run-time per- formances safely and easily. To make an object appear to move in slow motion, you need to strobe it at a rate slightly above or slightly below its actual speed (or any harmonic of its speed as discussed below). -
Page 14: Apparent Direction Of Movement
10. Application information 10.2 Apparent direction of movement The direction (clockwise vs. counterclockwise or forward vs. backward) at which the object appears to move is determined by the flash rate, the object’s actual direction of movement and the orientation of the stroboscopic beam to the object. -
Page 15: Determing An Object's True Rpm
10. Application information The image will appear to freeze again at 3,000 FPM. At this rate, the fan appears to be very bright. You can now use the FINE ADJUSTMENT knob to vary the rate above and below 3,000 to make the fan appear to move both clok- kwise and counterclockwise. - Page 16 10. Application information Example 1 (mark needed): This example shows why identifying marks are important. Suppose you want to determine the true RPM of this fan. The only thing you know is that its speed is less than 3,500 RPM. If you slowly decrease the flash rate starting from 3,500 FPM, the following “frozen”...
- Page 17 10. Application information Using the orientation mark, it is now clear that the images appearing at 3,300, 1,650 and 825 RPM are multiple- image harmonics. In each of these cases, three identifica- tion marks appear. On the other hand, a singular image appears at 1,100 and again at 550.
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Page 18: Maintenance
11. Maintenance Due to the high voltage contained within the , the testo 476 user should not attempt to repair the device (exception: Replacing the flash tube, see p. 12). If your needs repair, please contact the nearest testo 476 Testo service point. -
Page 19: Technical Data
Housing Material Dimensions 240 x 65 x 40mm / 9,75 x 2,75 x 1,75inch Weight 465g Ambient Conditions Ambient Temp. 0°...40°C (32°...114°F) Storage Temp. -25°C...70°C (-10°F...125°F) Humidity max. 95% not condensed Warranty 2 years, warranty conditions see website www.testo.com/warranty... - Page 20 AG Postfach 11 40, 79849 Lenzkirch Testo-Straße 1, 79853 Lenzkirch Telefon: (07653) 681-0 Fax: (07653) 681-100 E-Mail: info@testo.de Internet: http://www.testo.com 0970 4761 en 02...
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