Siemens Sitrans LR400 Instruction Manual page 38

3.4.3 S/N Ratio
Signal-to-noise ratio of the measured value in dB
S/N ratio provides a relative measure of the strength of reflection of the material in dB. Its
display can be evaluated as follows:
• x > 20:
• 20 > x > 10:
• x < 10:
3.4.4 Validity
Validity of the measured value in %
This parameter provides a percentage measure of the certainty that the displayed
measured value corresponds to the real level and does not represent a multiple echo or a
fixed target. Its display can be evaluated as follows:
• x > 70:
• 70 > x > 50:
• 50 > x > 20:
• x < 20:
3.4.5 Sensor Temp
Internal electronics sensor temperature
4. Device Data
4.1 Units
4.1.1 Length Unit = Parameter 1.2
4.1.2 Volume unit (F = m
Specifies volume units used for dimensional values
Value
Page 34 SITRANS LR400 (7ML5421) – INSTRUCTION MANUAL
very good
good
satisfactory
very good
good
uncertain
no plausible measured value
3
)
bbl
3
yd
3
ft
3
in
bush
bbl (liq)
l
3
m
hL
Gal
ImpGal
7ML19985FH06