TESTO 835 User Manual

8. Settings
8.1 Performing settings
- The instrument is switched on.
1 Open settings mode with [].
- A box appears around the selected function.
2 Select the required function with []and open with [].
3 Perform settings with []and apply with []:
Functions
Backlight: set the intensity of the display illumination.
Laser: switch the laser on/off for measurement spot marking.
Beeper: switch the beeper on/off.
Continual: switch continual IR measurement on/off.
Unit: set the temperature unit.
Emissivity: set the emission level (also see chapter 8.2). This function can also be opened directly from
the measurement view with
[
ε
]
.
Memory: manage the memory (also see chapter 8.3).
Alarm: set alarm thresholds (also see chapter 8.4).
Calendar: set the date and time. When measurement data is saved, it is given a date and time stamp.
Language: set the user interface language (also see chapter 6.2).
Reset: reset to factory settings.
Information: display instrument information.
8.2 Details: Emissivity
The emission level can be set in three different ways.
- The Emissivity function is opened.
Select material
Select a material (with allocated typical emission level) from the list with []and
apply the selection with [].
Customise manual
1 Use []to select Customise manual and open the function with [].
2 Set the emission level with []and apply this setting with [].
Customise automatic
A connected contact probe or a separate contact thermometer is required. The
emission level is calculated via a comparison of the measured surface temperatures
(contact measurement and IR measurement).
Automatic calculation is not possible if the temperature difference between the
measurement object and the surrounding environment is too low or the infrared
reading is higher than the contact reading: ---is displayed and the previously set
value is retained.
1 Use []to select Customise automatic and open the function with [].
- If a contact probe (thermocouple type K, class 1) is connected, the surface
temperature measured via the thermocouple (T
TC
) is displayed. If no contact probe is
connected, the temperature (measured with a different contact thermometer) must
18 8. Settings

TESTO 835 Specifications

General

Emissivity	0.1 to 1.0 adjustable
Resolution	0.1 °C
Spectral Range	8 to 14 µm
Temperature Range	-30 to +500 °C
Optics	50:1
Response Time	500 ms