TESTO 550 Manuel utilisateur

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testo 550 · Digital manifold

Instruction manual

www. .com information@itm.com1.800.561.8187

2

www. .com information@itm.com1.800.561.8187

1 Contents

3

1Contents

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

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

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

2.2. Ensure safety...................................................................................5

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

3Specifications ..........................................................................................6

3.1. Use ..................................................................................................6

3.2. Technical data .................................................................................6

4Product description.................................................................................8

4.1. Overview..........................................................................................8

5First steps ................................................................................................9

6Using the product ..................................................................................11

6.1. Preparing for measurement ...........................................................11

6.1.1. Connecting the temperature sensor ...............................................................11

6.1.2. Switching the instrument on...........................................................................12

6.1.3. Selecting the measuring mode.......................................................................13

6.2. Performing the measurement ........................................................14

7Maintaining the product ........................................................................16

8Tips and assistance...............................................................................18

8.1. Questions and answers .................................................................18

8.2. Measurement parameters .............................................................18

8.3. Error reports ..................................................................................19

8.4. Accessories and spare parts .........................................................19

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2 Safety and the environment

4

2Safety 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.

Symbols and writing standards

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.

Note: Basic or further information.

1....

2....

Action: more steps, the sequence must be

followed.

> ... Action: a step or an optional step.

- ... Result of an action.

Menu Elements of the instrument, the instrument

display or the program interface.

[OK] Control keys of the instrument or buttons of

the program interface.

... | ... Functions/paths within a menu.

“...” Example entries

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2 Safety and the environment

5

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.

> The objects to be measured or the measurement environment

may also pose risks: Note the safety regulations valid in your

area when performing the measurements.

> If the measuring instrument falls or another comparable

mechanical load occurs, the pipe sections of the refrigerant

hoses may break. The valve positioners may also be damaged,

whereby further damage to the interior of the measuring

instrument may occur that cannot be identified from the outside.

The refrigerant hoses must therefore be replaced with new,

undamaged refrigerant hoses every time the measuring

instrument falls or following any other comparable mechanical

load. Send the measuring instrument to Testo Customer

Service for a technical check for your own safety.

> Electrostatic charging can destroy the device. Integrate all the

components (system, manifold's valve block, refrigerant bottle

etc.) into the potential equalisation (earthing). Please see the

safety instructions for the system and the refrigerant used.

2.3. Protecting the environment

> Dispose of faulty rechargeable batteries/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.

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3 Specifications

6

3Specifications

3.1. Use

The testo 550 is a digital manifold for maintenance and servicing

work at refrigeration systems and heat pumps. It must only be used

by qualified authorized personnel.

The testo 550 replaces mechanical manifolds, thermometers and

pressure/temperature tables by means of its functions. Pressures

and temperatures can be loaded, adjusted, tested and monitored.

The testo 550 is compatible with most non-corrosive refrigerants,

water and glycol. The testo 550 is not compatible with refrigerants

that contain ammonia.

The product must not be used in areas at risk of explosion!

3.2. Technical data

Characteristic Values

Parameters Pressure: kPa / MPa / bar / psi

Temperature: °C/°F/K

Sensor Pressure: 2 x pressure sensor, temperature:

2 x NTC

Meas. cycle 0.75 s

Measurement

channels

Quantity: 4

Interfaces Pressure connections: 3 x 7/16" UNF

NTC measurement

Measuring ranges Pressure measuring range HP/LP:

-1 to 50 bar (rel)/-14.7 to 725 psi (rel)/

100 to 5000 kPa (rel)/0.1 to 5 MPa (rel)

Temperature measuring range:

-50 to +150 °C/-58 to 302 °F

Humidity application

range

10 to 90 % RH

Overload 60 bar, 6000 kPa, 6 MPa, 870 psi

Resolution Pressure resolution: 0.01 bar/0.1 psi/

1 kPa/0.001 MPa

Temperature resolution: 0.1 °C/0.1 °F

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3 Specifications

7

Characteristic Values

Accuracy (nominal

temperature

22 °C/71.6 °F)

Pressure: ±0.75 % of final value (±1 digit)

Temperature (-40…150°C): ±0.5 K (±1 digit)

No. of refrigerants 40

Selectable

refrigerants

No refrigerant, R12, R22, R123, R134a,

R290, R401A, R401B, R402A, R402B,

R404A, R406A, R407A, R407C, R408A,

R409A, R410A, R411A, R413A, R414B,

R416A, R417A, R420A, R421A, R421B,

R422A, R422B, R422D, R424A, R427a,

R434A, R437A, R438A, R502, R503, R507,

R600, R600a, R718 (H2O), R744 (only in

permissible measuring range up to 50 bar),

R1234yf (Display: T8)

Measurable media Measurable media: All media that are stored

in the testo 550. Not measurable: Ammonia

(R717) and other refrigerants which contain

ammonia

Ambient conditions Operating temperature: -10 to 50 °C/

14 to 122 °F

Storage temperature: -20 to 60 °C/

-4 to 140 °F

Housing Material: ABS/PA/TPU

Dimensions: 265 x 135 x 75 mm

Weight: approx. 1000 g (without batteries)

Power supply Current source: Rechargeable

batteries/batteries 4x 1.5 V, type

AA/mignon/LR6

Battery life: approx. 150 h (display light off)

Display Type: Illuminated LCD

Updating of readings: 1 s

Response time: 0.5 s

Directives,

standards and tests

EC Directive: 2004/108/EC

Warranty Duration: 2 years

Warranty conditions: see website

www.testo.com/warranty

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4 Product description

8

4Product description

4.1. Overview

Display and control elements

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

cover

2Foldable suspension device (on rear)

3Display. Instrument status icons:

Icon Significance

Battery capacity: >75 %/>50 %/>25 %/<10 %

/ / Select measuring mode (see)

4Battery compartment. It is not possible to charge rechargeable

batteries in the instrument!

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5 First steps

9

5Control keys:

Key Function

[Set] Set units

[R, Start/ Stop] Select refrigerant/ Start/stop / Tightness

test

[Mode] Switching measuring mode

[Min/Max/Mean] Display min./max./mean values

[▲] Up key: Change display view

[p=0] Pressure zeroing

Light key: Switch display light on/off

[▼] Down key: Change display view

[ ] Switching the instrument on/off

6Sight glass for refrigerant flow

72 x valve positioner

83 x hose parkers for refrigerant hoses

93 x connections 7/16" UNF, brass

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

quick connect fitting, passage can be locked via valve

positioner. Centre: for refrigerant bottles, for example, with

sealing cap.

5First steps

Inserting batteries/rechargeable batteries

1.Fold out the suspension device and open the battery

compartment (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.

When not in use for long period: Remove

batteries/rechargeable batteries.

Completely charge rechargeable batteries before using the

instrument.

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5 First steps

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Switching the instrument on

> Press [].

- Initialization phase:

• All display segments are lit (length of time: 2 s).

- Measurement view is opened.

Performing settings

1.Press [Set].

- The configuration menu is opened and the adjustable

parameter flashes.

2.Set parameters:

Key functions

Representation Explanation

[▲]or [▼]Change parameter, select unit

[Set] Select units/parameters

Adjustable parameters

Representation Explanation

°C, °F Set temperature unit.

bar, kPa, MPa, psi Set unit of pressure.

Pabs, Prel or psia,

psig

Depending on the selected unit of pressure:

Switch between absolute and relative

pressure display.

29.92 inHg/

1.013 bar

Set current absolute pressure (see table)

/ / Select measuring mode (see Selecting the

measuring mode, page 13)

 Settings will be applied following the final selection.

Operating valve positioner

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 anticlockwise.

> Close valve: Turn valve positioner clockwise.

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