Vaisala DM500 - Manual (Page 102)

User's Guide ______________________________________________________________________
100 _________________________________________________________________ M210205EN-D
XFLOW Setting the Flow Value Temporarily
Syntax: XFLOW x.xxx<cr>
where
x.xxx =
sample air flow value
The function of XFLOW is the same as with the command FLOW
except that with the command XFLOW the setting is valid only until
power is turned off or the command XFLOW is given without
parameters. After this the flow rate stored with the command FLOW
is valid again.
PRES Setting the Pressure
Syntax: PRES<cr>
Sets the pressure if there is no pressure transducer in the system. The
pressure value is needed in volume flow rate calculations in the T
d
measuring algorithm as well as in T
d
→ ppm unit conversion.
Example:
>pres ?
Pressure : 1.0132 bar
>pres 1.0
Pressure : 1 bar
>
NOTE
If the pressure setting is frequently adjusted, e.g. by using an external
barometer as a pressure input source, the command XPRES is
recommended.
XPRES Setting the Pressure Temporarily
Syntax: XPRES xx.xx<cr>
where
xx.xx =
sample air pressure value