Vaisala PTU300 Guide de l'utilisateur Page 84

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User's Guide ______________________________________________________________________
82 __________________________________________________________________ M210796EN-A
Example:
>pstab <cr>
Stab. indicator: OFF ? on
Max P change : 0.5 ? 1.0
PDMAX [x] <cr>
where
x = Pressure reading
The PDMAX [x] command is used to define the maximum pressure
difference between the pressure readings from two pressure
transducers (P1 and P2). If the defined value is exceeded, the relevant
digit in the ERR field will change from 0 to 1.
Crucial conditions for an acceptable measurement are:
- two transducers: P high - P low = Pd max limit/less than Pd max
limit
The factory setting for Pdmax is 1.0 hPa.
Example of setting the limit to 0.5 hPa:
>pdmax <cr>
Max P diff. : 1.00 ? 0.5
Pdmax limit works as follows:
>form 4.1 p1 " " p2 " " p " " u3 " " ERR #r#n
OK
Example1: Maximum pressure difference is within the limit
>send
1034.2 1034.4 1034.3 hPa 0000
>
Example2: Maximum pressure difference exceeds the limit
>send
1034.2 1035.4 ****** hPa 1000
>
Use the ERRS command to analyze problems.
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