PBI Dansensor CheckPoint O2/CO2 Manual De Uso página 13

12 User Manual
What does "Response time (T
mean
According to the specifications on page 3
the O sensor has a Response time (T
2
10 sec.
This means that when performing
consecutive measurements in areas with
large differences in the O
the device will reach 95 % of the "true"
value during the first measurement (10
sec.).
O reading
2
[%]
Start value
T value
95
"True" value
PBI-200616-G 03/2010
concentrations,
2
Difference
T=0
EN
)"
Example:
95
(See illustration below):
• Last measurement was performed in i.e.
20.9 % O
) of
95
• The following value to be measured is
1.0 % O
• Difference is:
20.9 - 1.0 = 19.9 % O
• The expected read-out value after first
measuring is:
20.9 - (0.95 * 19.9) = 2.0 % O
Difference = Start value
T valu e = Start value
95
T=10
(1. measurement)
Consequently this means that if there is a
large difference in the O
between two consecutive measurements,
multiple measurements must be
performed to obtain the most accurate
result.
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CheckPoint O
2
2
2
"True" value
(0.95*Difference)
T=20
(2. measurement)
concentrations
2
PBI-Dansensor A/S
/CO
2 2
2
time [sec]