TESTO 521 Instruction Manual page 9

Differential pressure meters
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Display
Header (see detailed explanation of icons below:
Icons in the header)
Designation of internal sensor or input socket 1
with selected channel and parameter unit
Reading 1
Designation of input socket 1 or 2 with selected
channel and parameter unit
Reading 2
Measuring functions
Icons in the header:
Counter for identifying the stored logs in the case of
M.
manual, automatic and fast storage of the measure-
ment series.
Counter for identifying the measurements in a measure-
N 0000
ment series in the case of automatic and fast storage.
Appears: manual saving set.
Flashes: current readings saved.
Appears: automatic saving set.
Flashes: automatic saving running.
The memory content will be cleared.
Appears: printing possible.
Flashes: print function activated.
Battery / rechargeable batter capacity:
All segments dark: rechargeable battery/battery full.
All segments light, flashing: Battery / rechargeable bat-
tery empty. The instrument switches off automatically
after 1 min.
3. Product description
3.2 Controls
9

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