TESTO 552 User manual

testo 552 - 'LJLWDO9DFXXP0HWHU
Instruction manual

Content
Content
1
Safety and waste disposal ................................................................... 1
1.1 About this document ............................................................................. 1
1.2 Safety .................................................................................................... 1
1.3 Waste disposal ...................................................................................... 2
2
Technical data ..................................................................................... 3
3
Description of the instrument ............................................................... 4
3.1 Use ........................................................................................................ 4
3.2 Instrument overview .............................................................................. 4
3.3 Displays overview.................................................................................. 5
3.4 Control keys overview ........................................................................... 6
3.5 Connection options overview ................................................................ 7
4
Operation............................................................................................. 8
4.1 Connecting ............................................................................................ 8
4.2 Switching instrument on and off............................................................ 9
4.3 Switching background illumination on and off ...................................... 9
4.4 Setting units and AutoOff ...................................................................... 9
4.5 Displaying temperature values ............................................................ 12
4.6 &DOLEUDWLRQ$GMXVWPHQW........................................................................ 13
4.7 Operating as a probe on the testo 570................................................ 13
5
Maintenance ...................................................................................... 14
5.1 Changing batteries .............................................................................. 14
5.2 Cleaning the instrument....................................................................... 14
6
Tips and assistance ........................................................................... 15
6.1 Questions and answers ....................................................................... 15
6.2 Accessories and spare parts ............................................................... 15

1 Safety and waste disposal
1
1
Safety and waste disposal
1.1
About this document
•The instruction manual is an integral part of the instrument.
•Keep this document throughout the entire operating life of the instrument.
•Always use the complete original instruction manual.
•Please read this instruction manual through carefully and familiarise
yourself with the product before putting it to use.
•Pay particular attention to the safety instructions and warning advice in
order to prevent injury and damage to the product.
1.2
Safety
General safety instructions
•Only operate this instrument in the proper manner, for its intended purpose
and within the parameters specified in the technical data.
•Do not apply any force to open the instrument.
•Do not operate the instrument if there are signs of damage at the housing,
mains unit or connected cables.
•Always comply with the locally valid safety regulations when carrying out
measurements. Dangers may also arise from objects to be measured or
the measuring environment.
•Do not store the product together with solvents.
•Do not use any desiccants.
•Only perform maintenance and repair work on this instrument that is
described in this documentation. Follow the prescribed steps exactly.
•Use only original spare parts from Testo.
Batteries
•Improper use of batteries may cause the batteries to be destroyed, or lead
to injury due to current surges, fire or escaping chemicals.
•Only use the batteries supplied in accordance with the instructions in the
instruction manual.
•Do not short-circuit the batteries.
•Do not take the batteries apart and do not modify them.

1 Safety and waste disposal
2
•Do not expose the batteries to heavy impacts, water, fire or temperatures
in excess of Ɠ)60 °C.
•Do not store the batteries in the proximity of metal objects.
•Do not use any leaky or damaged batteries.
•In the event of contact with battery acid: rinse affected areas thoroughly
with water, and if necessary consult a doctor.
•Take batteries out of the instrument immediately if they are not functioning
properly or if they show signs of overheating.
•Remove all batteries from the instrument if it is to remain unused for a
longer period.
Warnings
Always pay attention to any information denoted by the following warnings.
Implement the precautionary measures specified!
Display Explanation
WARNING
Indicates possible serious injury.
CAUTION
Indicates possible minor injury.
ATTENTION
Indicates possible damage to equipment.
1.3
Waste disposal
•Dispose of faulty rechargeable batteries and spent batteries in accordance
with the valid legal specifications.
•At the end of its useful life, dispose of the instrument via separate
collection for electro- and electronic devices. Please observe local
regulations concerning waste disposal. Or alternatively return the product
to Testo for disposal.

2 Technical data
3
2
Technical data
Feature Values
Absolute pressure sensor
(absolute)
max. 6 bar (87 psi)
ATTENTION
Pressure exceeded.
Destruction of the absolute pressure
sensor!
-
Do not exceed the maximum value.
Vacuum measuring range 1100 - 0 mbar / 825080 - 0 micron
Sensor overload (relative) 5 bar / 72 psi
Vacuum resolution 0.01 hPa / 10 micron
Vacuum accuracy
(at Ɠ)22 °C, after
calibration, confidence
level 95%)
- 0 to  micron:
±10RIUHDGLQJRUƄ micron
ZKLFKHYHULVJUHDWHU 


Operating temperature -20 to 50 °C / -4 to 122 °F
Storage temperature -20 to 50 °C / -4 to 122 °F
Temperature measuring
range
-20 to 50 °C / -4 to 122 °F
Temperature resolution 0.1 °C / 0.1 °F
Battery life 2400 h (2x AA) (approx. 130 h with background
illumination activated)
Protection class IP 42
Parameter mmHg, Torr, mbar, hPa, micron, inH2O, inHg.
Pa
Measuring cycle 0.5 sec
Sensor 1× absolute pressure sensor
Connections - 2× 7/16" UNF
- 1x MiniDIN (t570)
Warranty 2 years
Warranty terms: see website
www.testo.com/warranty

3 Description of the instrument
4
Setting values alarm threshold
Unit Adjustment resolution
mbar / hPa 0 - 7,5 0,05
micron 0 - 7500 50
3
Description of the instrument
3.1
Use
The testo 552 is a digital vacuum gauge for the precise measurement of
extremely small pressures in the vacuum range. This allows you to monitor the
evacuation (usually during commissioning) of refrigeration systems and heat
pumps.
With the testo 552, you can therefore measure the current pressure in a
refrigeration system, and thus gather information about the degree of
dehumidification and the removal of foreign matter (oils, foreign gases, etc.).
A vacuum gauge is always used in conjunction with a vacuum pump (generates
the vacuum). A manifold (analogue or digital) is also often used in order to
obtain controlled access to the refrigeration system.
3.2
Instrument overview

3 Description of the instrument
5
Element Function
1
MiniDIN probe socket Cable connection for connecting to the testo
570.
2
Display Displays instrument status icons, measuring
units and measuring values.
3
Control keys Instrument operation.
4
Connections 7/16"
UNF, brass
Connection of refrigerant hoses, vacuum pump,
manifolds, etc..
5
Hook Suspension device
6
Battery compartment Contains two AA batteries.
3.3
Displays overview
Element Function
1
Icon [ ] Displays the remaining battery capacity.
>75%
>50%
>25%
<10%
2
Icon [ ] An alarm threshold is set.

3 Description of the instrument
6
Element Function
3
Temperature display - selected, currently measured temperature
- Measurement parameter:
TH2O = evaporation temperature of water
Tamb = ambient temperature
Δt = temperature difference between
evaporation temperature of water and ambient
temperature
- unit set (°C, °F)
4
Slave Mode Appears when the testo 552 is connected to the
testo 570 via a connecting cable and the
testo 570 is in Evacuation mode.
5
Pressure display Displays the currently measured pressure, the
measurement parameter and the unit set (mmHJ,
Torr, mbar, hPa, micron, inHO, inHg).
3.4
Control keys overview
Element Function
1
- Switches to the settings.
- Switches between the set-up options.
2
Switches the display illumination on or off.
3
Switches the instrument on or off.
4
- Switches between the temperature displays.
- Navigates in the Set menu.

3 Description of the instrument
7
3.5
Connection options overview
In regard to the following connection options, the testo 570 is used to
represent any manifold and can use the testo 552 as a probe via a
MiniDIN connecting cable (see Option 1).
Option 1 (recommended)
The testo 552 is connected at the point that is furthest from the
vacuum pump. This ensures that a sufficiently deep vacuum is
generated throughout the system in order to remove any moisture or
foreign gases that may be present.
Option 2
Option 3

4 Operation
8
Option 4
Option 5
4
Operation
4.1
Connecting
Always use refrigerant hoses that are specifically intended for
evacuations.
1
- Remove sealing caps.
- Connect the testo 552 to the circuit.

4 Operation
9
4.2
Switching instrument on and off
1
- Press .
Ì
The instrument switches on or off.
4.3
Switching background illumination on
and off
1
- Switch the instrument on.
- Press .
Ì
The background illumination switches
on or off.
4.4
Setting units and AutoOff
The set-up menu must always be completely navigated through, even
if only one parameter needs to be changed.

4 Operation
10
1
- Switch the instrument on.
2
- Press to change settings.
3
- Press to set the pressure unit
required.
4
- Press .
Ì
The unit is set.
Ì
The display shows the temperature
unit.

4 Operation
11
5
- Press to set the temperature unit
required.
6
- Press .
Ì
The temperature unit is set.
Ì
The display shows the setting for the
alarm threshold.
Adjusting the alarm threshold causes an alarm to be triggered when
the set value is exceeded.
7
- Press to set the alarm threshold.
8
- Press .
Ì
The alarm threshold is set.
Ì
The display shows the AutoOff
setting.
If AutoOff is activated, the instrument switches off after 2 hours in
which no buttons are pressed.

4 Operation
12
9
- Press to switch AutoOff on or off.
10
- Press .
Ì
All settings are stored.
Ì
The display changes to the measuring
mode.
Ì
The instrument can now be used.
4.5
Displaying temperature values
1
- Press to change the temperature
measurement parameter.

4 Operation
13
Ì
The temperature measurement
parameter switches between TH2O,
Tamb and t.
t is displayed in K for °C, and
in °F for °F.
4.6
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- &RQWDFW7HVWRIRUSURFHGXUHDQGUHFRPPHQGHGHTXLSPHQW
4.7
Operating as a probe on the testo 570
1
- Switch the testo 552 on.
2
- Connect the connecting cable to the
MiniDIN probe socket of the testo
552.
3
- Connect the connecting cable to the
front-end MiniDIN probe socket of
the testo 570.
4
- Switch testo 570 on.
5
- On the testo 570 set Evacuation
mode.

5 Maintenance
14
Ì
The testo 552 switches to Slave
mode.
Ì
The readings are transmitted to the
testo 570.
5
Maintenance
5.1
Changing batteries
1
- Switch the instrument off.
2
- Flip hook up.
3
- Open the battery compartment.
4
- Remove batteries.
5
- Insert new batteries, observing the
indications inside the battery
compartment.
6
- Close the battery compartment.
7
- Fold hook down.
5.2
Cleaning the instrument
ATTENTION
Aggressive cleaning agents or solvents.
Sensor may be damaged!
-
The sensor should not be cleaned.

6 Tips and assistance
15
ATTENTION
Aggressive cleaning agents or solvents.
The instrument may be damaged!
-
Only clean the instrument housing.
-
Use mild household cleaning agents or soapy water.
9
- Close the connections using the sealing caps.
- Close the battery compartment lid.
1
- Wipe the instrument housing with a
damp cloth. Use mild household
cleaning agents or soapy water for
this.
6
Tips and assistance
6.1
Questions and answers
Question Possible cause / solution
Readings are incorrect. - Check that the testo 552 is connected
properly.
- Connect the testo 552 directly to the
vacuum pump in order to check the values.
- Check that all hoses are leak-tight.
- Carry out the field calibration of testo 552.
If we have not been able to answer your question, please contact your dealer or
Testo Customer Service. You will find contact details on the back of this
document or on the website
www.testo.com/service-contact
6.2
Accessories and spare parts
Description Item no.
Connecting cable for testo 552 0554 5520