Datasheet

ENS160 Datasheet v0.95 preliminary / December 2020
15
9 Output Signal Accuracy
1
Figure 10: Output Signal Accuracy for Hydrogen
The ENS160 exhibits an excellent
measurement accuracy and device-to-
device variation.
The opposite diagrams show the non-
linearity of several devices (left) and typical
and maximum accuracies (bottom) for
various hydrogen concentrations. A typical
error of <12% of the measured value can be
stated.
10 Initial Start-Up and Warm-Up
Table 9: Initial Start-Up and Warm-Up Timings
Parameter
Maximum Time
Comment
Initial Start-Up
1 hour
See below for further details
Warm-Up
1 minute
10.1 Initial Start-Up
Initial Start-Up is the time the ENS160 needs to exhibit reasonable air quality readings after
its first ever power-on.
The ENS160 sensor raw resistance signals and sensitivities will change upon first power-on.
The change in resistance is greatest in the first 48 hours of operation. Therefore, the ENS160
employs a start-up algorithm, allowing eCO
2
-, TVOC- and AQI-output signals to be used from
first power-on after 1 hour of operation
2
.
10.2 Warm-Up
Further to Initial Start-Up the conditioning or Warm-Up period is the time required to
achieve adequate sensor stability before measuring VOCs after idle periods or power-off.
Typically, the ENS160 requires 1 minute of warm-up before reasonable air quality readings
can be expected
1
.
1
All values have been determined by tests in clean, partially synthetic air in a climate chamber-with stated environmental
conditions, suitable reference analytics and sensor preconditioning of at least 24h, which may not reflect real-life environ-
ments. Unless otherwise noted, the accuracy statements have been carried out at 25°C and 50% relative humidity.
2
Slightly reduced signal accuracy may be encountered in early phase, thereafter.