EMA 200 Instruction Manual
8
Display
mode
Min
arrow
Max
arrow
Display
normal
measurement
off
off
instrument displays current
pressure value
hold
on
on
instrument displays pressure
value prior to switching modes
max
off
on
instrument displays the largest
measured pressure
min
on
off
instrument displays the smallest
measured pressure
6.3 Changing pressure units
The instrument allows the user to toggle between a number of different units of
pressure. Users can change pressure units during normal operation by
depressing the key. The following units are available:
The instrument will use the new units until it is switched on/off or until the next
time the units are changed. The units selected during configuration (see
section 7) are always set when the instrument is switched on.
6.4 Zeroing key
The effects of temperature and positioning of the measurement capsule may
cause the zero-point to shift, thereby distorting the measurement result, i.e.,
causing the instrument to display a measured value even when it is not
connected to a source of pressure. Users can recalibrate the zero point by
briefly pressing the
key.
It is critical that the instrument not be connected to an external source of
pressure when zeroing.
Pressure units
Factor for converting to Pa Flow rate in
1 kPa =
1000
m/s
1 Pa =
1
m/s
1 mbar(hPa) =
100
m/s
1 mmH
2
O =
9,80665
m/s
1 inH
2
O =
249,08891
fpm x 100
