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S

5.1.1. Measuring Relative Humidity

Once a relative humidity measurement has been made, the results of the measurement may be converted to

percent relative humidity by using the following expression:

%RH = 1

----2---5

--∗-R

----H

----_

----C

----o

65536

Where:

%RH is the measured relative humidity value in %RH

RH_Code is the 16-bit word returned by the TH06

A humidity measurement will always return XXXXXX10 in the LSB field.

Due to normal variations in RH accuracy of the device as described in Table 4, it is possible for the measured value

of %RH to be slightly less than 0 when the actual RH level is close to or equal to 0. Similarly, the measured value

of %RH may be slightly greater than 100 when the actual RH level is close to or equal to 100. This is expected

behavior, and it is acceptable to limit the range of RH results to 0 to 100%RH in the host software by truncating

values that are slightly outside of this range.

5.1.2. Measuring Temperature

Each time a relative humidity measurement is made a temperature measurement is also made for the purposes of

temperature compensation of the relative humidity measurement. If the temperature value is required, it can be

read using command 0xE0; this avoids having to perform a second temperature measurement. The measure

temperature commands 0xE3 and 0xF3 will perform a temperature measurement and return the measurement

value, command 0xE0 does not perform a measurement but returns the temperature value measured during the

relative humidity measurement.

The checksum output is not available with the 0xE0 command.

Sequence to read temperature value from previous RH measurement

Slave

Address

W

A

0xE0

A

Sr

Slave

Address

R

A

MS Byte

A

LS Byte

NA

P