User manual

H82.0.02.6C-05 Operating Manual GMH 5150 page 8 of 22
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Averaging Filter
*
1 … 120
Averaging period in seconds
oFF
Averaging function is deactivated
Auto Power-Off: Select power-off delay
1 ... 120
Power-off delay in minutes.
Device will be automatically switched off as soon as this time has
elapsed if no key is pressed/no interface communication takes
place.
oFF
Automatic power-off function deactivated (continuous operation)
Background illumination
oFF
Illumination deactivated
5 … 120
Turn off illumination after 5 
on
Illumination always on
Set Calculation: Calculated display values
*
Choice of function
oFF
No calculated display
dP:dt
Pressure change per time (leak rate measurements, ...)
SPEd
Flow speed measurement with pitot tube etc.
FLo
Volumetric flow rate measurement with pitot tube etc.
“dP:dt”: Settings
Time unit of pressure change rate
Per.S
Pressure change rate unit per second, e.g. mbar/s
Per.n
Pressure change rate unit per minute, e.g. mbar/min
Per.h
Pressure change rate unit per hour, e.g. mbar/h
Test period, for which the pressure change rate is calculated
0:01... 1:00
Period in [minutes:seconds], ex works: 1s
SPEd” or “Flo”: Settings
SPEd: speed unit
n:S
meter per second, m/s
kn:h
kilometer per hour, km/h
nPh
miles per hour, mph
knot
knots
FLo: Volumetric flow unit
n3:s
cubic meter per second, m
3
/s
n3:n
cubic meter per minute, m
3
/min
n3:h
cubic meter per hour, m
3
/h
L:S
liter per second, l/s
L:n
liter per minute, l/min
FLo: Volumetric flow - cross section
10.0 … 1999.9,
2000 … 14000
cross section in cm
2
0.1000 ...
1.9999
coefficient,(Prandtl pitot tube = 1.0000 please refer to
chapter 7.7)
-100.0 ... 1000.0
°C
air flow temperature
100.0 ... 1999.9
mbar
ambient pressure
0000, 000.0 …
00.00
decimal point setting
oFF, 1 … 1000
minimum display, below always display 0