Testo 550 Operating Manual

testo 550 · Digital manifold

Instruction manual

2

2 Safety and the environment

1 Content

1 Content .....................................................................................................3

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

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

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

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

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

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

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

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

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

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

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

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

6.1.1. Connecting the temperature probe.................................................................11

6.1.2. Switching the instrument on........................................................................... 11

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

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

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

8 Tips 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

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.

Symbols and writing standards

Represen-

Explanation

tation

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

displays or the program interface.

[OK] Elements of the instrument, the instrument

displays or the program interface.

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

“...” Example entries

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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.

2 Safety and the environment

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

3 Specifications

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.

3.2. Technical data

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

Characteristic Values

Parameters Pressure: kPa / MPa / bar / psi

Temperature: °C/°F/K

Sensor

Pressure: 2 x pressure sensor, temperature:
2 x NTC

Pressure media FCKW, FKW, N, H2O

Meas. cycle 0.75 s

Measurement

Quantity: 4

channels

Interfaces Pressure connections: 3 x 7/16" UNF

NTC measurement

Measuring ranges

Pressure measuring range HP/LP:

-1 to 40 bar (rel)/-14.7 to 580 psi (rel)/
100 to 4000 kPa (rel)/0.1 to 4 MPa (rel)

Temperature measuring range:

-50 to +150 °C/-58 to 302 °F

Humidity application

10 to 90 % RH

range

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

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