ROTRONIC HF8 - Manual (Page 9)

E-M-HF8-V2_10
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
HygroFlex HF8 Humidity Temperature
Transmitter: User Guide Instruction Manual
Document Type
Page 9 of 35
Document title
© 2012; Rotronic AG E-M-HF8-V2_10
Standard 3-line Large
o %RH
o Temperature
o Date and time
o Probe number
o %RH
o Temperature
o Calculated parameter
o Probe number
The date and time are not shown
o %RH or temperature or
calculated parameter shown
in large characters
o Date and time
o Probe number
Both the parameter and probe can
be changed from the keypad
The display can be configured to show a trend indicator on each line:
▲: increasing value
▼: decreasing value
Both arrows are displayed when the value is stable.
3.9.1 Alarm Indication on the display
Depending on the type of alarm, the display shows either the symbol [ ! ] to the right of the value or a text at
the bottom of the display when the HF8 detects an alarm condition:
o Out-of-limits value (defined with the ROTRONIC HW4 software for each probe input, includes
measured values and calculated parameter).
o No communication with the probe.
o Display of fixed values when no probe is connected the input. Easily identified humidity and
temperature values can be specified with the HW4 software for each probe input.
o Bad RH sensor or major sensor failure (open or shorted sensor – humidity and temperature)
3.10 Audible alarm (beeper)
The HF8 can emit a sound when an alarm condition occurs (out-of-limit value, loss of communication with a
probe, etc.). The audible alarm can be disabled, enabled and configured after connecting the HF8 service
connector to a PC running the ROTRONIC HW4 software. For details, see the following HW4 manual:
E-M-HW4v3-F2-015. The HF8 optional display and keypad do not provide access to the audible alarm
function.
3.11 Service connector
The service connector is a UART digital interface (Universal Asynchronous Receiver Transmitter) with a mini-
USB type connector. This allows connecting the HF8 with a service cable to a PC running the ROTRONIC
HW4 software. See “Maintenance” for the location of the service connector and for the type of service cable to
be used. The service connector is used for the following:
o Configuration of the HF8
o Downloading data recorded on the HF8
o Access to the HygroClip 2 probe functions
o Firmware updates
Note: the optional digital interface (Ethernet or RS-485) offers the same functionality as the service connector.
3.12 Protection grade of models with Ethernet interface
The protection grade of the enclosure of models with an Ethernet interface is not rated IP65 / NEMA 4.