Testo 549, 550 Operating Manual

testo 549 - testo 550 . Digital manifold

Instruction manual

1 Contents

1 Contents ................................................................................................... 3

2 Safety and the environment .................................................................... 4

2.1. About this document ........................................................................ 4

2.2. Ensure safety................................................................................... 4

2.3. Protecting the environment .............................................................. 5

3 Product description ................................................................................. 5

3.1. Use .................................................................................................. 5

3.2. Overview ......................................................................................... 6

4 First steps ................................................................................................ 7

5 Using the manifold .................................................................................. 9

5.1. Preparing for measurement ............................................................. 9

5.1.1. Switching the instrument On ............................................................................... 9

5.1.2. Connecting temperature probe(s) .....................................................................11

5.1.3. Switching Bluetooth® on and off (only testo 550) ............................................11

5.1.4. Measuring mode ...............................................................................................12

5.2. Performing the measurement ........................................................ 13

6 Technical data ........................................................................................ 16

6.1.1. Bluetooth module (only testo 550) ....................................................................16

6.1.2. General technical data ......................................................................................17

7 Maintaining the product ........................................................................ 19

8 Tips and assistance............................................................................... 20

8.1. Questions and answers ................................................................. 20

8.2. Measurement parameters ............................................................. 20

8.3. Error reports .................................................................................. 21

8.4. Accessories and spare parts ......................................................... 21

9 EC declaration of conformity ................................................................ 22

2 Safety and the environment

Representation

Explanation

Warning advice, risk level according to the signal word:

Warning! Serious physical injury may occur. Caution! Slight physical injury or damage to

the equipment may occur. > Implement the specified precautionary

measures.

Elements of the instrument, the instrument display or the program interface.

[OK]

Control keys of the instrument or buttons of the program interface.

2 Safety and the environment

2.1. About this document

Use

> 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.

Symbols and writing standards

2.2. Ensure safety

> Do not operate the instrument if there are signs of damage at

the housing, mains unit or hoses.

> 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.

> Dangers may also arise from the refrigeration systems being

measured or the measuring environment: Note the safety regulations valid in your area when performing the measurements.

> If the manifold falls or another comparable mechanical load

occurs, the pipe sections of the refrigerant hoses may break. The valve stem shutoff may also be damaged, whereby further damage to the interior of the manifold may occur that cannot be identified from the outside. The refrigerant hoses must therefore be replaced with new, undamaged refrigerant hoses every time the manifold falls or following any other comparable mechanical load. Send the manifold to Testo Customer Service for a technical check for your own safety.

> To prevent damage from ESD (electro-static discharge) or

transient voltage spikes make sure that your refrigeration system is properly grounded, as otherwise the manifold might get damaged.

2.3. Protecting the environment

> Dispose of spent batteries in accordance with the valid legal

specifications.

> At the end of its useful life, send the product to the separate

collection for electric and electronic devices (observe local regulations) or return the product to Testo for disposal.

> Refrigerant gases can harm the environment. Please note the

applicable environmental regulations.

3 Product description

3.1. Use

Testo 549 and testo 550 are digital manifolds for maintenance and service work on refrigeration systems and heat pumps. They are intended for use by qualified personnel only.

The functions of the testo 549 and testo 550 are designed to replace analog manifolds, thermometers and pressure/temperature charts. Pressures and temperatures can be applied, adapted, tested and monitored.

Testo 549 and testo 550 are compatible with most non-corrosive refrigerants, water and glycol. Testo 549 and testo 550 are not compatible with refrigerants containing ammonia.

The instruments must not be used in explosive environments!

3 Product description

Icon

Significance

Battery status

Bluetooth®

/ /

Measuring mode

3.2. Overview

Display and control elements

1 Mini-DIN probe socket for NTC temperature probe, with socket

cover 2 Foldable hanging hook (on rear) 3 Display. Instrument status icons:

4 Battery compartment. NOTE: Rechargeable batteries cannot

be charged inside the battery compartment.

4 First steps

Key

Function

[Set]

Set units

[R, ►, ■]

Select refrigerant/ Start/stop / Leakage test

[Mode]

Change measuring mode to Leak mode

[Min/Max/Mean]

Display min./max./mean values

[▲]

Up key: Scroll through menu

[P=0]

Pressure zeroing

Esc

Switches to the measurement / home view

[▼]

Down key: Scroll through menu

[ / ]

Switching the instrument on/off Switch the display illumination on/off.

When not in use for long period: Remove batteries/rechargeable batteries.

5 Control keys:

6 Sight glass for refrigerant flow 7 2 x valve stem shutoff 8 3 x hose holders for refrigerant hoses 9 3 x connections 1/4" SAE, brass

Left/right: Low pressure/high pressure, for refrigerant hoses with quick connect fitting

Center: for charge / discharge of refrigerant 10 Mini-USB connection for firmware update, inside the battery

compartment.

4 First steps

Inserting batteries / rechargeable batteries

1. Fold out the hanging hook and open the battery compartment by squeezing the clip lock.

2. Insert batteries (included in delivery) or rechargeable batteries (4x 1.5 V, type AA/Mignon/LR6) in the battery compartment. Observe the polarity!

3. Close the battery compartment.

- After inserting the batteries, the instrument switches on automatically and goes into the settings menu.

4 First steps

Key functions

Description

[▲] or [▼]

Change parameters and select units

[Set]

Confirm units / parameters

Selectable parameters

Description

°F, °C

Temperature unit

Psi, bar, kPa, MPa

Unit of pressure

Psig or Pabs, Prel

Switch between absolute and relative pressure display

Pamb

Set current absolute pressure in inches of HG or bar

/ /

Select measuring mode: heat pump / cooling / or Auto

AUTO OFF

Activate or deactivate Automatic power-off. Instrument switches off after 30 minutes if no temperature probe is connected and there is no pressure apart from ambient pressure

fac

Activate or deactivate surface temperature compensation factor, icon is shown on the display if the function is deactivated

Units / Parameter selection

1. Press [Set] to confirm or change unit parameter settings

2. Press [▲] or [▼] to change the units / parameters.  The settings will be accepted once the last selection has been

made.

 Settings will be applied following the final selection.

Operating valve stem shutoffs

The digital manifold acts like a conventional two-way manifold with regard to the refrigerant path: The passages are opened by opening the valves. The adjacent pressure is measured with valves closed as well as with them open.

> Open valve: Turn valve positioner counterclockwise. > Close valve: Turn valve positioner clockwise.

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