General Tools and Instruments HT50 v.1 - Manual (Page 18)

OTHER INDICATIONS
As mentioned earlier, the SET and STO buttons and the LCD
can be used together to display real-time temperature and
humidity measurements, and to indicate the current working
status of the HT50.
Circuitry inside the HT50 automatically shuts down the LCD
(to conserve battery life) if the SET or STO button has not
been pressed within the past 60 seconds. That is the case
even when the unit is logging data. In other words, the LCD is
normally “asleep”.
To wake up the LCD, briefly press the SET or STO button.
This first press of the button will cause the LCD to resume
displaying the same indication that was on-screen when the
LCD was last put to sleep.
Pressing the SET button briefly can produce three possible
display indications: (1) The current temperature, (2) the
current humidity level, and (3) the HT50's current working
status. Each press of the SET button changes the display to
the next indication in the sequence; pressing the SET button
when the LCD is displaying the unit's current working status
(3) resets the cycle to (1).
There are four possible working status indications:
• LOG: The unit is currently logging data
• - - -: The unit is in standby mode, ready to log data
• FUL: The unit’s internal memory is full and logging has
been stopped
• CON: The unit needs to be configured by software
The STO button has a third function, in addition to waking up
the LCD and adding IRT readings to sets of temperature and
humidity data logs. When the HT50’s LCD is on, brief presses
18