Extech Instruments LT45 User Manual page 5

MAX/AVG/MIN Memory Mode
The meter can record the maximum, minimum, and average readings as described below:
1. Momentarily press the MAX/AVG/MIN
maximum/average/minimum measurements; the "MIN" icon will display on the LCD
indicating that the meter is now displaying the minimum reading. The reading will not
change until a lower reading is registered.
2. Press the
maximum measurement value. The "MAX" icon will be displayed on the LCD.
3. Press the
show the average of the readings taken since the
icon will be displayed.
4. Press the
To exit this mode, press and hold the
should all be switched OFF when the unit returns to the normal operating mode.
Memory Record/Read Mode
1. Momentarily press the Mem/Read button to store a reading. The LCD will display a small 'M'
icon on the lower left‐hand area of the LCD along with the memory location number (1 to
99) representing the storage location for the recorded reading. Up to 99 readings can be
stored.
2. To review (read) the stored readings, press and hold the Mem/Read button until the 'MEM'
icon appears at the top of the LCD. Now use the arrow buttons to scroll through the stored
readings. The small 'M' icon and the memory location counter (1 to 99) will be shown on the
lower left‐hand corner of the LCD while the main display digits show the stored reading for
the selected memory location.
3. To store an average (AVG) reading, first access the AVG mode (See MIN/MAX/AVG section of
this guide) and while an average reading is displaying (AVG icon switched ON), momentarily
press the Mem/Read button for one second. The LCD will display 'AVG M' and the memory
location number (1 to 99) indicating that an average reading has been stored in the
numbered memory location.
4. When a stored reading is an AVG value, the screen will display 'AVG' on the lower left‐hand
corner.
5. Momentarily press the Mem/Read button to exit the Memory mode and return to the
normal operating mode.
6. To clear all 99 memory locations: With the meter switched OFF, press and hold the
Mem/Read and On/Off buttons simultaneously for two seconds. The meter will switch ON
and the screen will display "CLr" indicating that all of the 99 memory locations have been
erased.
Data Hold
Press the Hold button to freeze the displayed reading (the 'HOLD' icon will switch ON). Press the
button again to release the held reading (the 'HOLD' icon will switch OFF).
button again to switch from "MIN" to "MAX" where the meter will show the
button again to change the mode from "MAX" to "AVG", where the meter will
button again to switch from "AVG" back to "MIN".
button and the meter will begin to track the
button was first pressed. The "AVG"
button for at least 2 seconds. The MAX/AVG/MIN icons
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