HT Instruments HTA103 Bedienungsanleitung Seite 20

4.3. FUNCTION KEY DESCRIPTION
4.3.1. ON/OFF key
Pushing ON/OFF key you turn on and off the instrument. After turning on, the backlight is
active and it gets automatically disabled after approx. 20s.
4.3.2. UNIT/ key
Pushing UNIT/ key permits to select the temperature measurement unit among the
options: "°C" (Celsius), "°F" (Fahrenheit) and "K" (Kelvin). The UNIT/
the function "HOLD" is activated.
The formulas that link Celsius and Fahrenheit degrees are:
T [°C] =
so:
Pushing UNIT/ key longer (>2s) permits to activate/disable the backlight.
4.3.3. JKT key
Pushing JKT key permits to set the type of external probe (K, J or T) to be connected to
the instrument. Cyclically the K, J or T settings are displayed.
4.3.4. MAX and MIN key
Pushing MAX or MIN key permits to detect the Maximum or Minimum values of measured
temperature. The secondary display (see Fig. 2 – part 9) shows the symbol linked to the
selected function: The symbol "MAX" for maximum value and "MIN" for minimum value.
The MAX or MIN values are dynamically updated while the real time value of temperature
is displayed on the main display (see Fig. 2 – part 4)
4.3.5. HOLD/ENTER key
Pushing HOLD/ENTER key the instrument's measured value gets frozen on the display
and the symbol "HOLD" is displayed. The HOLD function does not affect the secondary
display.
4.3.6.  and  keys
Use the  and  arrow keys to set the offset values during the calibration operation of the
probe fitted in the terminal input of the instrument (see § 4.3.7).
or T [°F] = T [°C] * 1.8 + 32
0°C are equal to 32°F, 100°C are equal to 212°F
EN – 5
HTA103
key is disabled if