1
2
Element
Function
1
Infrared lens
IR measurement
2
4-point laser
Measuring spot marking
3
Humidity probe (only H1) Measures the relative humidity
4
Trigger
-
Switches the instrument on.
-
Starts / ends a measurement.
5
Battery compartment
Contains 3x AA batteries.
6
USB interface / probe
connection socket
-
For connecting the instrument to the PC to
connect to the EasyClimate software.
-
Connection of a probe.
7
-
Joystick for confirming a selection.
-
For navigating in the menu
8
ESC
Takes the user a step back in the menu selection.
9
Switches the testo 835 on or off.
10
Saves the measured readings.
11
Setting emissivity
12
HOLD
/
SCAN
-
Scan: while the trigger is held down and the
measurement is carried out.
-
Hold: displays the measured values.
13 Time
Displays the current time.
14 Reading display
Displays the measured readings.
Max
[°C/°F]
Min
Surface temperature (IR)
Max. IR temperature
IR temperature
Min. IR temperature
[°C/°F]
Differential (surface temperature - external probe
temperature)
TC temperature
IR temperature
Temperature difference TC / IR measurement
TC probe must be connected.
[%RH]
[°C/°F]
[°Ctd/°Ftd])
Humidity measurement (envir de
IR) (only H1)
Ambient humidity
IR temperature
Ambient dewpoint temperature
Element
Function
[%RH]
[°C/°F]
[°Ctd/°Ftd])
Humidity measurement (environment and
dewpoint) – ambient temperature (only H1)
Ambient humidity
Ambient temperature
Ambient dewpoint temperature.
Max
[°CDtd/°FDtd]
Min
Dewpoint distance measurement (only H1)
Temperature difference IR minus dewpoint max
current
min.
Max
aw[-]
Min
Surface moisture measurement (only H1)
Surface moisture max.
current
min.
Calculated from dewpoint, ambient air and
surface temperature
-
0.00 - 0.64: non-critical
-
0.65 - 0.80: poss. critical
-
0.81 - 1.00: critical
15
Displays the battery charge status.
16
Displayed if alarm is switched on.
17
Displays the selected emissivity.
18
Displayed if laser is switched on.
Connecting the thermocouple probe
1
-
Connect the connecting plug to the probe socket (6).
Switching the instrument on
1
-
Press
(9).
-
OR
-
Press
Trigger
(4).
Switching the instrument off
1
-
Hold down
(9) until the display goes off.
If no button is pressed for 2 minutes, the instrument switches off
automatically.
