- <xsl:value-of select="concat(format-number((($size*28.3168466) div ($pressure div 1013.25)), '0.000'), ' l')" />
+ <xsl:choose>
+ <xsl:when test="$pressure != '0'">
+ <xsl:value-of select="concat(format-number((($size*28.3168466) div ($pressure div 1013.25)), '0.000'), ' l')" />
+ </xsl:when>
+ <xsl:otherwise>0</xsl:otherwise>
+ </xsl:choose>