HT instruments THT70 - Manual (Page 11)

THT70
EN - 9
4.2 DESCRIPTION OF FUNCTION KEYS
The instrument has 5 function keys indicated as , , , , further in the
manual and a trigger key “T” with multiple functions.
4.2.1 Switching on/off the instrument
Press and hold the key for approx. 3 seconds to switch on the instrument. After approx.
20 seconds internal autotest, the instrument shows its normal measuring screen.
To switch off the instrument, proceed as follows:
1. Press and hold the key for 3 seconds. The instrument shows the following screen:
Fig. 5: Instrument switch-off screen
2. Drag the icon to the right until the end of the blue section. The instrument will
automatically switch off after a few seconds. Touch the “X” key to cancel the operation.
CAUTION
 A simple pressing of the
key only causes the display to switch off and
on again. The instrument also allows the display to automatically switch
off after a selected time (see § 5.2.1.2).
 The instrument may take approx. 10s to switch off in case it is connected
to the external power supply.
4.2.2 Key
Pressing the key allows showing/hiding the icons of the instrument's main menu
(operation possible also by touching the display), setting the value of the distance from the
object in Fusion screens (see § 5.1.3) and quitting the internal function screens and going
back to the main menu.
4.2.3 Key
The IR image on the display may be out of focus after a few minutes or if a new object is
framed. In order to solve this problem it is necessary that the instrument performs its
internal calibration. It is possible to manually calibrate the instrument at any time by
pressing the
key, or to let the instrument calibrate itself automatically after a certain set
time (see § 5.2.1.2).
4.2.4 Key
Press the
key to automatically save the IR image shown on the display in the
instrument's memory (micro SD card) (see § 5.2.4.1).