Datasheet

www.sensirion.com Version 0.9 – August 2017 9/15
Measure Test
The command “Measure_test” which is included for integration and production line testing runs an on-chip self-test. In case of
a successful self-test the sensor returns the fixed data pattern 0xD400 (with correct CRC).
Feature Set
0x0020
Command
Hex. Code
Parameter length
including CRC [bytes]
Response length
including CRC [bytes]
Measurement
duration [ms]
Typ.
Max.
Init_air_quality
0x2003
-
-
2
10
Measure_air_quality
0x2008
-
6
10
12
Get_baseline
0x2015
-
6
10
10
Set_baseline
0x201e
6
-
10
10
Set_humidity
0x2061
3
1
10
Measure_test
9
0x2032
-
3
200
220
Get_feature_set_version
0x202f
-
3
1
2
Measure_raw_signals
0x2050
-
6
20
25
Table 10 Measurement commands.
6.4 Soft Reset
A sensor reset can be generated using the “General Call” mode according to I
2
C-bus specification. It is important to
understand that a reset generated in this way is not device specific. All devices on the same I
2
C bus that support the General
Call mode will perform a reset. The appropriate command consists of two bytes and is shown in Table 11.
9
The «Measure_Test» command is intended for production line testing and verification only. It should not be used after having issued an
“Init_air_quality” command. For the duration of the «Measure_Test» command, the sensor is operated in measurement mode with a supply
current as specified in Table 3. After the command, the sensor is in sleep mode.