TESTO 557 Instruction Manual
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TESTO 557 Instruction Manual

Digital manifold
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Summary of Contents for TESTO 557

  • Page 1 557 · Digital manifold Instruction manual GlobalTestSupply www. .com nd Quality Products Online at: sales@GlobalTestSupply.co...

  • Page 2: Table Of Contents

    1 Contents Contents Contents ....................3 Safety and the environment ..............4 2.1. About this document ................ 4 2.2. Ensure safety ................... 4 2.3. Protecting the environment .............. 5 Product description ................. 5 3.1. Use ....................5 3.2. Overview..................6 First steps ....................

  • Page 3: Safety And The Environment

    2 Safety and the environment Safety and the environment 2.1. About this document > Please read this documentation 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 product.

  • Page 4: Protecting The Environment

    Product description 3.1. Testo 557 is a digital manifold for maintenance and service work on refrigeration systems and heat pumps. It is intended for use by qualified personnel only. The function of the testo 557 is designed to replace analog manifolds, thermometers and pressure/temperature charts.

  • Page 5: Overview

    3 Product description 3.2. Overview Display and control elements 1 Front connection for external vacuum probe 2 Mini-DIN probe socket for NTC temperature probe, with socket cover 3 Foldable hanging hook (on rear) 4 Display. Instrument status icons: Icon Meaning Battery status Bluetooth®...

  • Page 6: First Steps

    4 First steps 5 Battery compartment. The rechargeable batteries cannot be charged inside the instrument! 6 Control keys: Function [Set] Set units [R, ►, ■] Select refrigerant / Start-Stop leak test [Mode] Switch between measuring modes [Min/Max/Mean] Display min, max, mean values [▲] Up-key: Scroll through menu.
  • Page 7 4 First steps Units / Parameter selection 1. Press [Set] to confirm or change unit parameter settings 2. Press [▲] [▼] to change the units / parameters. The settings will be accepted once the last selection has been made. Key Functions Description [▲] [▼]...

  • Page 8: Using The Manifold

    5 Using the manifold WARNING Over tightening the valve stem shutoffs may cause: • Damage to the PTFE seal. • Mechanical deformation of the valve piston leading to the PTFE seal falling out. • Damage to the thread of the threaded spindle and the valve screw.
  • Page 9 > For your own safety you should return the manifold to the Testo Service Department for technical inspection. > You should therefore always replace the refrigerant hoses with new ones after an accidental drop has occurred or after any visible wear and tear.

  • Page 10: Connecting The Temperature Sensor

    Switching Bluetooth® on and off In order to to establish a connection via Bluetooth, on an Android or iOS device, the Testo App Refrigeration must be already installed. You can get the App for iOS instruments in the App Store or for Android instruments in the Play Store.

  • Page 11: Measuring Mode

    Normal function of the digital manifold Automatic If the automatic mode is activated, the mode testo 557 digital manifold automatically changes the display of the high and low pressure. This automatic change occurs when the pressure on the low-pressure side is 1 bar (15 psi) higher than the pressure on the high-pressure side.

  • Page 12: Performing The Measurement

    5 Using the manifold 5.2. Performing the measurement WARNING Risk of injury caused by refrigerant that is at high pressure, hot, cold, or poisonous! > Wear safety goggles and protective gloves.. > Before pressurizing the measuring instrument: Always fasten the measuring instrument at the hanging hook in order to prevent it from falling (risk of breakage) >...
  • Page 13 5 Using the manifold Key functions > Press [▲] [▼] to change the reading in the display. Possible display combinations: Refrigerant evaporation Refrigerant condensation temperature Ev/to (°F/°C) temperature Co/tc (°F/°C) Evaporation pressure Condensation pressure (psi/bar) (psi/bar) Measured temperature T1/t Measured temperature T2/t (°F/°C) (°F/°C) Evaporation pressure...
  • Page 14 3. To leave vacuum mode, remove the vacuum probe from the testo 557 or switch to the standard measurement view using the [Mode] button. GlobalTestSupply www.

  • Page 15: Technical Data

    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. GlobalTestSupply www. .com nd Quality Products Online at: sales@GlobalTestSupply.co...

  • Page 16: General Technical Data

    6 Technical data 6.1.2. General technical data Feature Values Pressure: psi / kPa / MPa / bar Temperature: °F / °C / K Parameters Vacuum: micron / inHg / inH O / hPa / mbar / mTorr /Torr / Pa 2 Pressure: sensors, 2 Temperature (NTC Sensors Thermistors)
  • Page 17 R437A, R438A, R502, R503, R507, R508A, R508B, R600, R600a, R718 (H2O), R744 (CO2) (only in permissible measurement range up to 60 bar), R1234yf All refrigerants that are stored in the testo 557 Measurable Ammonia (R717) and other refrigerants which media contain ammonia will damage the manifold Operating temperature: -4…122°F / -20…50°C...

  • Page 18: Maintaining The Product

    7 Maintaining the product Maintaining the product Cleaning the instrument Do not use harsh cleaning agents or solvents! Mild soap and water may be used. > Clean instrument using a damp cloth. Keeping connections clean > Keep screw connections clean and free of grease and other deposits, clean with a moist cloth as required.
  • Page 19 CAUTION Carrying out cleaning with the probe connected may result in damage to the probe! > Remove the vacuum probe from the testo 557! CAUTION Damage to the sensor due to sharp objects! > Do not insert any sharp objects into the probe! 1.

  • Page 20: Tips And Assistance

    8 Tips and assistance Tips and assistance 8.1. Questions and answers Question Possible causes/solution Batteries are almost empty. flashes > Change batteries. The instrument switches Residual capacity of the batteries is too off automatically. low. > Change batteries. uuuu lights up instead of The permissible measuring range has the parameter display been undershot.

  • Page 21: Error Reports

    If you have any questions, please contact your dealer or Testo Customer Service. The contact details can be found on the back of this document or on the Internet at www.testo.com/service- contact.

  • Page 22: Ec Declaration Of Conformity

    9 EC declaration of conformity EC declaration of conformity GlobalTestSupply www. .com nd Quality Products Online at: sales@GlobalTestSupply.co...

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