Display - TESTO 645 Instruction Manual

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
The symbols on the top line are explained below
 Name of input socket and parameter

Displays reading in line 1

Name of input socket and parameter
 Displays reading in line 2

Displays measurement functions
Explanation of symbols:
Counter for the log number in the memory.
When saving manually: number of a measurement saved.
When saving automatically: number of a measurement series.
M. 00
This counter is needed in order to be able to find single logs or a
measurement series when reading the memory.
Counter for saving a measurement cycle (is only required with
N. 0000 automatic saving).
The measurement cycle in a measurement series can be found.
Manual saving of a single measurement by pressing the save
button
Automatic saving program has been set up.
Saving is activated by pressing the
Symbol for reading contents of memory on display.
Symbol for deleting memory contents
If this symbol appears, the printing function is activated.
The symbol flashes while data is being transmitted. You can
print on the desktop printer by pressing the print button
Shows capacity of battery and rechargeable battery.
If the inner segment no longer appears (symbol flashes), the
battery has to be changed or the rechargeable battery has to be
recharged. The instrument switches itself off automatically after
1 minute.
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