General Tools and Instruments HT50 v.1 - Manual (Page 7)

Display Legend
▲: indicates reading is higher than high alarm setpoint
for that parameter
▼: indicates reading is lower than low alarm setpoint
for that parameter
%RH: relative humidity unit
°C: Celsius temperature unit
°F: Fahrenheit temperature unit
IRT: Indicates operation in IRT mode
Hold: Indicates that IRT measurement is being held on
the display
[-]888.8: Humidity or temperature value or one of the
following four working status indications
LOG: Unit is logging data
- - -: Unit is in standby mode, ready to log data
FUL: Internal memory is full (and logging has been
stopped)
CON: Unit needs to be configured by software
7
Fig. 1b. All possible
display indications
on the HT50