Datasheet

EL-USB-2
Temperature, Humidity and Dew Point
Data Logger
www.lascarelectronics.com
Issue 14 08/2016 N.R Page 3 of 4
SENSOR ACCURACY & INFORMATION
± 0
± 2
± 4
± 6
± 8
± 10
0102030405060708090 100
Relative Humidity (%RH)
Δ RH (%RH)
maximum error
typical accuracy
± 0.0
± 0.5
± 1.0
± 1.5
± 2.0
-40 -200 20 40 60 80
Temperature (°C)
maximum error
typical accuracy
ΔT (°C)
0
20
40
60
80
100
-40-20 020406080 100 120
Temperature (°C)
Relative Humidity (%
)
Max.
Range
Normal
Range
100 ±3.5 ±3 ±3.5 ±4
90 ±2.5 ±3 ±3.5
80 ±3 ±3.5
70 ±3 ±2.5 ±3
60
50 ±2.5 ±2
40
30
20
10 ±3 ±2.5
0±3.5±3
01020304050607080
Relative Humidity (%RH)
Temperature (°C)
EL-USB-2, EL-USB-2-LCD
Typical and maximal tolerance at 25°C for relave humidity.
± 0
± 2
± 4
± 6
± 8
± 10
0102030405060708090 100
Relative Humidity (%RH)
Δ
RH (%RH)
maximum error
typical accuracy
± 0.0
± 0.5
± 1.0
± 1.5
± 2.0
-40 -200 20 40 60 80
Temperature (°C)
maximum error
typical accuracy
ΔT (°C)
0
20
40
60
80
100
-40-20 020406080 100 120
Temperature (°C)
Relative Humidity (%
)
Max.
Range
Normal
Range
100 ±3.5 ±3 ±3.5 ±4
90 ±2.5 ±3 ±3.5
80 ±3 ±3.5
70 ±3 ±2.5 ±3
60
50 ±2.5 ±2
40
30
20
10 ±3 ±2.5
0±3.5±3
01020304050607080
Relative Humidity (%RH)
Temperature (°C)
EL-USB-2, EL-USB-2-LCD
Typical and maximal tolerance for temperature sensor in °C.
± 0
± 2
± 4
± 6
± 8
± 10
0102030405060708090 100
Relative Humidity (%RH)
Δ RH (%RH)
maximum error
typical accuracy
± 0.0
± 0.5
± 1.0
± 1.5
± 2.0
-40 -200 20 40 60 80
Temperature (°C)
maximum error
typical accuracy
ΔT (°C)
0
20
40
60
80
100
-40-20 020406080 100 120
Temperature (°C)
Relative Humidity (%
)
Max.
Range
Normal
Range
100 ±3.5 ±3 ±3.5 ±4
90 ±2.5 ±3 ±3.5
80 ±3 ±3.5
70 ±3 ±2.5 ±3
60
50 ±2.5 ±2
40
30
20
10 ±3 ±2.5
0±3.5±3
01020304050607080
Relative Humidity (%RH)
Temperature (°C)
EL-USB-2, EL-USB-2-LCD
Typical accuracy of relave humidity measurements given in
%RH for temperatures 0 to 80°C.
± 0
± 2
± 4
± 6
± 8
± 10
0102030405060708090 100
Relative Humidity (%RH)
Δ
RH (%RH)
maximum error
typical accuracy
± 0.0
± 0.5
± 1.0
± 1.5
± 2.0
-40 -200 20 40 60 80
Temperature (°C)
maximum error
typical accuracy
ΔT (°C)
0
20
40
60
80
100
-40-20 020406080 100 120
Temperature (°C)
Relative Humidity (%
)
Max.
Range
Normal
Range
100 ±3.5 ±3 ±3.5 ±4
90 ±2.5 ±3 ±3.5
80 ±3 ±3.5
70 ±3 ±2.5 ±3
60
50 ±2.5 ±2
40
30
20
10 ±3 ±2.5
0±3.5±3
01020304050607080
Relative Humidity (%RH)
Temperature (°C)
EL-USB-2, EL-USB-2-LCD
Operang condions
Long term exposure to humidity levels outside of the
‘normal’ range may temporarily oset RH measurements
(±3%RH aer 60 hours). Once returned to less extreme
condions the device will slowly return towards calibraon
state.
When tracking changes in ambient condions, the response me of the humidity sensor in your data logger is approximately
20 minutes to reach 90% of the reading. However, if you are measuring step changes in humidity (for example if calibrang the
product) it is advised that you leave the unit for up to four hours to ensure that it has enough me to sele at the new level.
It is worth remembering that the value of relave humidity is of course sensive to temperature variaon. As an example, at a
relave humidity of ~90%RH at ambient temperature, a variaon in temperature of 1°C will result in a change of up to -5%RH.
Therefore when comparing mulple devices or calibrang them, any temperature variaons must be considered.