Memory mode
The last temperature taken before the thermo- meter powers down is stored in memory. To enter the memory mode, press the 
/mem button.
Even in memory mode, a new temperature can be taken provided that the ready symbol is 
shown.
IRT 3020
The last stored temperature is displayed along with the MEM symbol. To quit the memory mode, press the 
/mem button again.
IRT 3520
This model allows you to store up to 8 temper- atures.
When pressing the 
/mem button, the display shows the memory cell number (e.g. MEM 1). When releasing the 
/mem button, the stored temperature is displayed.
Each time the 
/mem button is pressed, a new memory cell is displayed (up to MEM 8).
An empty memory cell shows «- - - °F».
Only the first empty memory cell will be displayed.
To quit the memory mode, press the 
/mem button again after reaching MEM 8 or «- - - °F».
Memory clear
Press the 
/mem button for 5 seconds to clear the temperatures stored in memory. Release the 
/mem button to return to the ready symbol 
.
LCD light (model IRT 3520 only)
For easy nighttime reading.
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