TESTO 881 User manual

testo 881 · Thermal imager
Instruction manual

2

1 Contents
3
1 Contents
1Contents ...................................................................................................3
2Safety and the environment....................................................................4
2.1. About this document ........................................................................4
2.2. Ensure safety...................................................................................5
2.3. Protecting the environment..............................................................6
3Specifications ..........................................................................................7
3.1. Use ..................................................................................................7
3.2. Technical data .................................................................................9
4Product description...............................................................................14
4.1. Overview........................................................................................14
4.2. Basic properties.............................................................................15
5First steps ..............................................................................................17
5.1. Commissioning ..............................................................................17
5.2. Getting to know the product...........................................................19
6Using the product..................................................................................26
6.1. Menu functions ..............................................................................26
6.1.1. Measuring functions....................................................................................... 26
6.1.2. Image gallery .................................................................................................29
6.1.3. Scale..............................................................................................................30
6.1.4. Display...........................................................................................................31
6.1.5. Emissivity....................................................................................................... 31
6.1.6. Palette ...........................................................................................................34
6.1.7. Configuration .................................................................................................34
6.2. Measuring......................................................................................37
7Maintaining the product ........................................................................40
8Tips and assistance...............................................................................42
8.1. Questions and answers .................................................................42
8.2. Accessories and spare parts .........................................................43

2 Safety and the environment
4
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.
Warnings
Always pay attention to information that is marked by the following
warnings with warning pictograms. Implement the specified
precautionary measures.
Representation Explanation
WARNING Indicates potential serious injuries
CAUTION indicates circumstances that may lead to
damage to the products
Symbols and writing standards
Represen-
tation
Explanation
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.

2 Safety and the environment
5
Represen-
tation
Explanation
[OK] Control keys of the instrument or buttons of the
program interface.
... | ... Functions/paths within a menu.
“...” Example entries
2.2. Ensure safety
> Only operate the product properly, for its intended purpose and
within the parameters specified in the technical data. Do not
use any force.
> Do not operate the instrument if there are signs of damage at
the housing, power supply or feed lines.
The thermal imager must not be directed at the sun or other
sources of intense radiation (e.g. objects with temperatures greater
than 500 °C, 800 °C while using the high-temperature filter) during
operation. This may lead to serious damage to the detector. The
manufacturer accepts no warranty for this type of damage to the
microbolometer detector.
> 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.
> 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.
> Improper use of rechargeable batteries can lead to destruction
or injuries by means of current surges, fire or escaping
chemicals. The following instructions must be observed to avoid
such hazards:
• Only use in accordance with the directions in the instruction
manual.
• Do not short, take apart or modify.
• Do not expose to heavy impacts, water, fire or temperatures
above 60 °C.
• Do not store in the proximity of metal objects.

2 Safety and the environment
6
• Do not use leaky or damaged rechargeable batteries. In the
event of contact with battery acid: Thoroughly wash affected
area with water and consult a doctor, if necessary.
• Only charge in the instrument or the recommended charging
station.
• Immediately stop the charging process if this is not
completed in the given time.
• In the event of improper function or signs of overheating,
immediately remove the rechargeable battery from the
measuring instrument/charging station. Caution:
Rechargeable battery may be hot!
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.

3 Specifications
7
3 Specifications
3.1. Use
The testo 881 is a handy and robust thermal imager. It opens the
door to contactless determination and illustration of the temperature
distribution on surfaces for you.
Typical areas of application are:
• Building inspection (heating, ventilation and air conditioning
trade, company technicians, engineering offices, experts):
Energy evaluation of buildings
• Preventative maintenance (servicing): Mechanical and electrical
inspection of systems and machines
• Production monitoring (quality assurance): Monitoring
production processes
The testo 881 is available in several versions, which are tailored to
various usage requirements:
• testo 881-1: High-quality wide-angle lens 32° x 23, detector
160 x 120, NETD < 50 mK, manual focus, 2 GB SD card for
approx. 1000 images, minimum focus distance 10 cm,
integrated digital camera
• testo 881-2: High-quality wide-angle lens 32° x 23°, detector
160 x 120, NETD < 50 mK, manual focus, 2 GB SD card for
approx. 1000 images, minimum focus distance 10 cm,
exchangeable lens, isotherm, min./max. on area, audio
comments, display of surface moisture distribution, lens
protection glass included in the delivery
• testo 881-3: High-quality wide-angle lens 32° x 23°, detector
160 x 120, NETD < 50 mK, 2 GB SD card for approx. 1000
images, minimum focus distance 10 cm, integrated digital
camera with power LEDs for illumination, dynamic motorfocus,
isotherm, min./max. on area, audio comments, display of
surface moisture distribution, high-temperature filter (optional)

3 Specifications
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Export control
Thermal imagers may be subject to the export restrictions of the
European Union.
The testo 881 with 33 Hz in particular can only be exported to
countries outside of the European Union with an export permit from
the authorities.
Please observe the national regulations for export control when
exporting.

3 Specifications
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3.2. Technical data
Infrared image output
Characteristic Values
Field of vision/min.
focusing distance
Standard lens: 32° x 23°/0.1 m (0.33 ft)
Telephoto lens (testo 881-2/-3 only,
optional):
9° x 7° / 0.5 m (1.64 ft)
Thermal sensitivity
(NETD)
<50 mK at 30 °C (86 °F)
Geometric resolution Standard lens: 3.3 mrad
Telephoto lens: 1 mrad
Refresh rate 33 Hz within EU, Switzerland, USA,
New Zealand, Japan
9 Hz other countries
Focus Manual
testo 881-3: manual + motorized
Detector type FPA 160 x 120 pixels, a.Si
Spectral range 8 - 14 μm
Visual image output (testo 881-1/-3 only)
Characteristic Values
Field of vision/min.
focusing distance
33° x 25°/0.4 m (1.31 ft)
Image size 640 x 480 pixels
Refresh rate 8 to 15 Hz
Image presentation
Characteristic Values
Image display 3.5" LCD with 320 x 240 pixels
Display options testo 881-2: Infrared image
testo 881-1/3: Infrared image/real
image/infrared and real image
Video stream 25 Hz

3 Specifications
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Characteristic Values
Colour palettes 9 options
Measuring
Characteristic Values
Temperature range
(can be changed)
Measuring range 1:
-20 - 100 °C (-4 - 212 °F)
Measuring range 2:
0 - 350 °C (32 - 662 °F)
Measuring range 3 (testo 880-3 only):
350 - 550 °C (662 - 1022 °F)
Accuracy With measuring range 1 activated, for
readings within the range of -20 - 100 °C
(-4 - 212 °F):
±2 °C (±3.6 °F) or ±2 % of reading
(whichever is the greater)
With measuring range 2 activated, for
readings within the range of 0 - 350 °C
(32 - 662 °F):
±2 °C (±3.6 °F) or ±2 % of reading
(whichever is the greater)
With measuring range 3 activated (testo
880-3 only), for readings within the range of
350 - 550 °C (662 - 1022 °F):
±3 % of reading
Reproducibility ±1 °C (±1.8 °F) or ±1 % (whichever is the
greater)
Measuring point
minimum diameter
Standard lens: 10 mm at 1 m
Telephoto lens: 3 mm at 1 m
On-time (time to
image)
30 s
Measuring functions Standard measurement (1-point), 2-point
measurement (testo 881-2/-3 only), Cold-
/Hotspot
Also with testo 881-2/-3: isotherm,
min./max. on area, display of surface
moisture distribution via manual input of the
dewpoint temperature