Testo 835-T2 Operating Manual
Bedienungsanleitung de
Instruction manual en
Mode d’emploi fr
Manual de instrucciones es
Manuale di istruzioni it
Handleiding nl
Руководство пользователя ru
testo 835
Infrarot- und Kontaktthermometer
Infrared and contact thermometer
Thermomètre infrarouge et à contact
Termómetro de contacto e infrarrojo
Termometro a infrarossi e a contatto
Infrarood- en contactthermometer
Инфракрасный термометр
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1. General information
1. General information
Please read this document through carefully and familiarise yourself with the operation
of the product before using it. Keep this documentation to hand so that you can refer to
it when necessary.
2. Safety information
Avoid electrical hazards:
Do not conduct measurements on or near live parts!
Adhere to the product safety/warranty requirements:
Always operate the instrument properly and according to its intended purpose and
within the parameters specified. Do not use force.
Do not store with solvents (e.g. acetone).
Only open the instrument if this is expressly described in the documentation for the
purpose of maintenance or repair work.
Ensure correct disposal:
Dispose of defective rechargeable batteries and spent batteries at the collection
points provided.
Send the instrument directly to us at the end of its life cycle. We will ensure that it is
disposed of in an environmentally friendly manner.
3. Intended use
The testo 835 is a compact infrared thermometer for non-contact measurement of
surface temperatures. When a probe is connected, a contact measurement can also be
carried out. The H2 version also has an integrated humidity probe for measuring
ambient humidity.
The product should not be used in the following areas:
· Potentially explosive areas
· For diagnostic measurements in the medical sector
4. Technical data
Feature Values
Infrared measurement
Lens 50:1 + opening diameter of the sensor (24 mm /0.95”)
Spectral range 8 to 14 μm
Laser type 4point laser
Output / wavelength < 1 mW / 8 to 14 μm
Class / standard 2 / EN 608251:2007
Measuring range T1 / H1: 30 to +600 °C / 22 to +1112 °F
T2: 10 to +1500 °C / 14 to +2732 °F
Resolution 0.1°C/°F
Accuracy T1 / H1: ±2.5 °C / ±4.5 °F (30.0 to 20.1 °C / 22.0 to 4.1 °F)
(at +23 °C / 73.4 °F, ±1.5 °C / ±2.7 °F(20.0 to 0.1 °C / 4.0 to 31.8 °F)
±1 digit) ±1.0 °C/ ±1.8 °F (0.0 to +99.9 °C / 32.0 to +211.9 °F)
±1 % of the measuring value (remaining range)
T2: ±2.0 °C / ±3.6 °F or ±1 % of the measuring value
(the higher value applies)
Measuring rate 0.5 s
Contact measurement
Sensor type Thermocouple type K (connectable)
Measuring range T1 / H1: 50 to +600 °C / 58 to +1112 °F
T2: 50 to +1000 °C/ 58 to +1832 °F
Resolution 0.1 °C/°F
Accuracy (±1 digit) ± (0.5 °C / 0.9 °F + 0.5 % of the measuring value)
Measuring rate 0.5 s
Humidity measurement (only H1)
Measuring range 0 to 100 % RH (at 20 to +50 °C) / 4 to +122 °F)
Resolution 0.1 %RH (humidity)
0.1 °C/°F (temperature)
0.1 °C td/°F td (dew point temperature)
Accuracy (±1 digit) ± 2 %RH
± 0.5 °C/ 0.9 °F
Measuring rate 0.5 s
General
Operating temperature 20 to +50 °C / 4 to 122 °F
Transportation/storage
temperature 30 to +50 °C / 22.0 to 122 °F
Voltage supply 3 x battery type AA or via USB port (only in conjunction with EasyClimate software)
Battery life 25 h (typical at 25 °C / 77 °F without laser and display illumination)
10 h (typical at 25 °C / 77 °F without display illumination)
Housing ABS/PC
Dimensions 193 x 166 x 63 mm / 7.6 x 6.5 x 2.5”
Weight T1 / T2: 514 g / 1.13 lbs (incl. batteries)
H2: 527 g / 1.16 lbs (incl. batteries)
EC Directive 2004/108/EC
Warranty 2 years, warranty terms: see www.testo.com/warranty
14 4. Techical data
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5. Product description
1 Infrared sensor (IR) lens
2 4-point laser for measurement spot marking
3 Ambient humidity probe, ambient temperature probe (only H1)
4 Trigger (measurement, switching on)
5 Battery compartment
6 USB interface, probe connector socket for thermocouple probe (TC)
7 Control keys:
· []: Switch instrument on/off
· []: Save measuring values
· []: Open Emissivity menu
· [Esc]: Back
· []: 5-way joystick (press , up , down , left , right ): Open
configuration menu, confirm entry, navigate
8 Display
155. Product description
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