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7. Measuring
M.
00
MAN.
i . 1
h P a
10.08
1 . 1
° C
24.8
M.
02
MAN
i . 3
m 3 / h
23
2 . 1
° C
22.6
M.
00
MAN.
i . 1
h P a
10.08
1 . 1
? C
24.8
Hold
Max. Min. Mean
Mean
24.8
Hold
7.1 Zeroing the display
521 526
The measurement values can be falsified by a
change in the position of the measuring instrument.
After zeroing, the position of the measuring instrument
must not be changed. Carry out zeroing before every
measurement in order to compensate faulty positi-
oning or long-term zero-point drift. For the display
of the internal pressure to be zeroed, the instrument
must be in the measurement menu and there must be
a differential pressure of < 2.5 % of the full-scale value
(at testo 5213 reset <20% of the full scale value).
Zero the display values of all connected (zeroable)
521
pressure probes with
Zeroing is lost when the instrument is switched off.
7.2 Selecting readings
If velocity or volume flow is activated, these values are
displayed in the upper line by pressing the
Select required reading 2 (bottom line) with
7.3 Activating measuring func-
521 526
tions
The instrument has the following measuring functions:
- Hold value (Hold)
- Display maximum value (Max.)
- Display minimum value (Min.)
- Calculate spot mean value (Mean)
- Calculate chronological mean (Mean
For the measuring functions to be called up, the inst-
rument must be in the measurement menu.
521 526
Select the measuring functions one after the other
with
Hold
The last readings are held in the display.
7.1 Zeroing the display
.
:
7. Measuring
39
key.
.
)
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