OPERATING INSTRUCTIONS
METEODIGIT IV (9164)
9
To
display all memory data
press and hold down key
MEM
The function field displays the
last memory location; the
main field displays the meas-
ured value.
To select the first memory location press:
MIN
To select the last memory location press:
MAX
To increment the memory location press:
M
▲
To decrement the memory location press:
M
▼
To clear the memory press:
CLR
To terminate memory display press:
MEM
10.4 Relative measuring
For certain measuring tasks it
is very useful to zero the
measured value in order to
observe just the subsequent
deviations. It is obligatory to
set zero for air flow measure-
ments by means of Pitot tubes
according to Prandtl.
This function is independent of the locking status and
does not modify the programming parameters in the
connector.
To zero-set the measured value press key:
CLR
To display relative measuring with arrow:
Return to normal measured value press and hold down
CLR
Setting to zero automatically deletes the maxi-
mum and minimum values for this channel. The
MAX
,
MIN
, and
MEM
functions are thus also available
for relative measurement.
11. DEVICE CONFIGURATION
On METEODIGIT IV a num-
ber of parameters can be
configured. For doing this
press and hold down key
MEM
when switching ON.
The function field should then
show an abbreviation for the
parameter and the main field
should show the value currently set.
To select from all possible parameters,
press keys:
M
▲
or
M
▼
Averaging time for measuring (MD)
Locking the
CLR
–key :
Automatic switch OFF time in minutes:
Air pressure for measuring value compensation:
To enter a value
first press:
ON
and the value starts flashing
To modify the value press keys:
M
▲
or
M
▼
To delete parameters press:
CLR
Select the next digit or entry is completed:
ON
To terminate or cancel configuration
:
MEM
11.1 Moving average
METEODIGIT IV offers all the possibilities to calculate
the average value. In the first menu item the averaging
term “MD” can be adjusted for the moving average (in
the example the measuring point M0). Possible values
for the averaging term are 1, 10, 20, 30, 40, 50, 60, 70,
80, 90, 100, 110, 120 s. The calculation of average
values will just be effected for the displayed channel.
The adjusted averaging term will be memorized inside
the plug of the sensor and is available again after
switching on the METEODIGIT IV or after connecting to
another METEODIGIT IV.
11.2 Device locking
The measured value in the main field of the display can
be manipulated by pressing key
CLR
and setting it to
zero. This function can be evaluated in different ways
or even switched off in cases where there is a risk of
accidentally activating relative measuring by zero-
setting the measured value.
Loc
parameter:
0 The offset is saved in RAM, base of zero-point – de-
pending on locking
1 The offset in saved in RAM only.
2 Relative measuring is locked
11.3 Automatic switch OFF
In menu item ´AOFF´ an automatic device switch OFF
time can be programmed in minutes; this will help to
save the batteries. This automatic device switch OFF
will not take effect if the setting is ´- -´ or if a mains a-
dapter or an interface cable is connected.
11.4 Atmospheric pressure compensation
Measured variables dependent on the ambient atmos-
pheric pressure may, in the event of large deviations
from normal pressure (1013 mbar), involve certain
measuring errors.
It is advisable therefore, especially when taking meas-
urements at appreciable heights above sea level to
take due account of the atmospheric pressure (approx.
-11 mbar / 100 meters above mean sea level, MSL).
The appropriate atmospheric pressure can be entered
in parameter 'mb' in device programming.
