ROTRONIC HF65 - Manual (Page 11)

E-M-HF63_65-V1_11
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
Instruction Manual
Document Type
HygroFlex HF63/HF65 Humidity Temperature
Transmitters: User Guide
Document title
Page 11 of 34
© 2008; Rotronic AG E-M-HF63_65-V1_11
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Modbus: the Modbus protocol available with the HF65 is limited to reading measurement data from the
HF65. Functions such as device configuration, humidity and temperature adjustment, etc. are not
supported by the Modbus protocol.
When using either the RO-ASCII or the Custom protocol, the HF65 can be set to send data automatically after
each refresh cycle without requiring a data request. When this mode is enabled, the receiving device must be
listening at all times in order to get the measurement data.
For details, see document E-M-AC3000-CP
3.6 Service connector
The service connector (UART interface with a mini-USB type connector) allows connecting the HF6 either to a
PC running the ROTRONIC HW4 software or to a probe input of another instrument that is compatible with the
HygroClip 2 (HC2) probes. In both cases a service cable is required. See “Maintenance” for the location of the
service connector and for the type of service cable to be used.
• Connecting the HF63 or HF65 to a PC is used to configure the HF6, gain access to the HF6 functions such
as humidity and temperature adjustment, read data from the HF6 on the PC and update the AirChip 3000
firmware.
• Connecting the HF6 to the probe input of another instrument is useful only when the other instrument has
its own display and keypad, and has an internal menu equivalent to the menu of the HP23 hand-held
calibrator. The connection allows showing the data measured by the HF6 on the other instrument display
and also allows using the other instrument internal menu to do for example a humidity and temperature
adjustment of the HF6.
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HF65 (digital outputs): the USB, Ethernet and RS-485 interfaces offer the same functionality as the
service connector but do not allow connecting the HF6 to a HP23 hand-held calibrator.
3.7 Sensor protection (dust filter)
The probe of the HF6 requires a filter to protect the sensors against dust particles and high air velocity.
Wall mount models: the probe of the HF6 is equipped with a slotted cap with a Polyethylene insert
Duct mount and cable probe models: the probe of the HF6 is equipped with a with a metal filter base mod.
NSP-ME. The filter cartridge must be ordered separately (see Accessories 11.7). Filter cartridge mod. SP-M15
is suitable for most applications.
3.8 Direct RTD option (HF63)
The standard H63 is equipped with one Pt100 RTD. When ordered with the direct RTD option, the HF63 is
supplied with a second Pt100 RTD installed on the probe. This additional RTD is directly connected to a
terminal block. (4-wire connection)