ROTRONIC HF3 - Manual (Page 8)

E-M-HF3-V1_22
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
HygroFlex HF3 Transmitters and Thermo-
hygrostats: User Guide Instruction Manual
Document Type
Page 8 of 27
Document title
© 2009-2011; Rotronic AG E-M-HF3-V1_22
MEASUREMENT ACCURACY AND RELIABILITY
► Data recording The data recording function differs from a true data logging
function in the sense that the AirChip 3000 does not time stamp
the data. The data recording function can be used to investigate
events such as a sensor malfunction as well as to retrieve data
that would otherwise be lost
o Start or stop data recording - up to 2000 value pairs (%RH
and temperature). Starting a recording session erases all
previously recorded data
o The recording mode and log interval can be specified
o When the device is powered off, the recording session is
paused but not ended As long as the recording session has
not been ended, the device automatically resumes recording
data when powered up again
o The recorded data can be downloaded to a PC with the
HW4 software, time stamped and viewed
MEASUREMENT LOOP VALIDATION
AirChip 3000 Functions Description
► Simulator mode Used to generate fixed values for the humidity, temperature and
calculated parameter. Can be configured, enabled or disabled
DEVICE SAFEGUARDS
AirChip 3000 Functions Description
► Device write protection Used to protect the device with a password to prevent
unauthorized digital access by a digital user. Can be configured,
enabled or disabled
PROCESS PROTECTION / PROTECTION OF OTHER DEVICES
AirChip 3000 Functions Description
► Limit humidity output to 100 %RH Used to prevent the humidity signal from exceeding
100 %RH when condensation forms on the sensor. Can be
enabled or disabled
► Out-of-limit value alarm Used to specify the normal range for humidity, temperature and
the calculated parameter depending on the user application.
Can be configured, enabled or disabled
Out-of-limit values trigger a digital alarm which can be also be
seen on the optional display
► Bad sensor alarm Built-in function. Cannot be disabled
A bad humidity or temperature sensor triggers a digital alarm
which can be also be seen on the optional display
► Fail safe mode Used to specify a "safe" fixed value for humidity and for
temperature in the event of a sensor failure. Can be configured,
enabled or disabled