PRES and XPRES commands - HMP155

HMP155 User Guide
Document code
M210912EN
Revision
G.1
Language
English
Product
HMP155
Document type
User guide

Use the PRES command to set ambient pressure value for fixed pressure compensation.

If the value is changed frequently, use the XPRES serial line command. Its value is cleared to 0.0 at reset; if it is set to other than 0, it overrides the setting given with the PRES command.

In normal pressure conditions, the PRES command is not needed. If mixing ratio is used in high altitudes, pressure changes increase the mixing ratio.

Use the serial line and do the following:

PRES a.aaaa
XPRES a.aaaa
Parameter Description
a.aaaa Ambient pressure value (bar)

Example

>pres
Pressure    : 1.013 bar ? 
>

Example

>xpres
Pressure: 0.000 bar?
>